order no. r1 2012 0101 npdes no. ca0023051 wdid...order no. r1‐2012‐0101 occidental county...

ORDERNO.R1‐2012‐0101NPDESNO.CA0023051WDIDNO.1B83001OSON

WASTEDISCHARGEREQUIREMENTS

FORTHE

OCCIDENTALCOUNTYSANITATIONDISTRICT

ANDSONOMACOUNTWATERAGENCY

OCCIDENTALWASTEWATERTREATMENTFACILITY

SONOMACOUNTY

ThefollowingPermitteeissubjecttowastedischargerequirementsassetforthinthisOrder:

Table1. PermitteeInformation

Permittee OccidentalCountySanitationDistrict(Owner)andSonomaCountyWaterAgency(Operator)

NameofFacility OccidentalCountySanitationDistrictWastewaterTreatmentFacility(WWTF)

FacilityAddress

14445OccidentalRoad

Occidental,CA95465

SonomaCounty

TypeofFacility Publicly‐OwnedTreatmentWorks(POTW)

FacilityDesignFlow 0.05mgd(averageannualdryweathertreatmentcapacity)1

TableNotes:1.Theaverageannualdryweatherflowshallbethearithmeticmeanoftheinfluentflowforthefourconsecutivelowestflowmonthsinacalendaryear.

Table2. DischargeLocationsDischargePoint EffluentDescription

DischargePointLatitude

DischargePointLongitude ReceivingWater

001Disinfectedsecondarytreatedmunicipal

effluent38°24’46”N 122°56’31”W Effluentstoragepond

(Graham’sPond)

ORDERNO.R1‐2012‐0101OCCIDENTALCOUNTYSANITATIONDISTRICTandSONOMACOUNTYWATERAGENCYNPDESNO.CA0022888

Limitations and Discharge Requirements 2

DischargePoint

EffluentDescription DischargePointLatitude

DischargePointLongitude

ReceivingWater

effluent‐‐‐ ‐‐‐

OutfallfromGraham’sPondtoDutchBillCreek,tributarytotheRussianRiver

effluent‐‐‐ ‐‐‐

DischargestoLoades’PropertyIrrigation

System

Table3. AdministrativeInformationThisOrderwasadoptedbytheRegionalWaterQualityControlBoardon: December6,2012ThisOrdershallbecomeeffectiveon: February1,2013ThisOrdershallexpireon: January31,2018ThePermitteeshallfileaReportofWasteDischargeasanapplicationforrenewalofwastedischargerequirementsinaccordancewithtitle23,CaliforniaCodeofRegulations,nolaterthan:

March1,2017

TheU.S.EnvironmentalProtectionAgency(USEPA)andtheRegionalWaterQualityControlBoardhaveclassifiedthisdischargeasaminordischarge.

ITISHEREBYORDERED,thatthisOrdersupersedesRegionalWaterQualityControlBoard(RegionalWaterBoard)OrderNo.93‐42andMonitoringandReportingProgram(MRP)No.93‐42(revisedApril23,2009)upontheeffectivedatespecifiedinTable3.Inordertomeettheprovisionscontainedindivision7oftheCaliforniaWaterCode(WaterCode)(commencingwithsection13000)andregulationsadoptedthereunder,andtheprovisionsofthefederalCleanWaterAct(CWA)andregulationsandguidelinesadoptedthereunder,thePermitteeshallcomplywiththerequirementsinthisOrder.ThisactioninnowaypreventstheRegionalWaterBoardfromtakinganyenforcementactionforpastviolationsofthepreviouspermit.IfanypartofthisOrderissubjecttoatemporarystayofenforcement,unlessotherwisespecified,thePermitteeshallcomplywiththeanalogousportionsofOrderNo.93‐42,whichshallremainineffectforallpurposesduringthependencyofthestay.

I,MatthiasSt.John,ExecutiveOfficer,doherebycertifythatthisOrderwithallattachmentsisafull,true,andcorrectcopyoftheOrderadoptedbytheCaliforniaRegionalWaterQualityControlBoard,NorthCoastRegion,onDecember6,2012.

_____________________________________________MatthiasSt.John,ExecutiveOfficer

TableofContents

I. FacilityInformation ....................................................................................................... ..5 II. Findings ........................................................................................................................ ..5 III. DischargeProhibitions................................................................................................... ..6 IV. EFFLUENTLIMITATIONSANDDISCHARGESPECIFICATIONS ......................................... ..7

A. EffluentLimitations .................................................................................................. ..7 B. LandDischargeSpecifications ................................................................................... 10 C. Irrigation/ReclamationSpecificationsandRequirements–DischargePoint003(AuthorizedReclamationSites) ...................................................................................... 10 D. OtherRequirements ................................................................................................. 16

V. ReceivingWaterLimitations .......................................................................................... 17 A. SurfaceWaterLimitations ........................................................................................ 17 B. GroundwaterLimitations ......................................................................................... 19

VI. Provisions ..................................................................................................................... 19 A. StandardProvisions ................................................................................................. 19 B. MonitoringandReportingProgram(MRP)Requirements ......................................... 20 C. SpecialProvisions .................................................................................................... 20

VII. ComplianceDetermination ............................................................................................ 31 A. General .................................................................................................................... 31 B. MultipleSampleData ............................................................................................... 31 C. AverageMonthlyEffluentLimitation(AMEL) ............................................................ 32 D. AverageWeeklyEffluentLimitation(AWEL) ............................................................. 32 E. MaximumDailyEffluentLimitation(MDEL) .............................................................. 32 F. InstantaneousMinimumEffluentLimitation ............................................................. 33 G. InstantaneousMaximumEffluentLimitation ............................................................. 33 H. Mass‐BasedEffluentLimitations ............................................................................... 33 I. BacteriologicalLimitations(TotalColiform) .............................................................. 34 J. ChronicToxicityTriggers ......................................................................................... 34

ListofTables

Table1. ....... PermitteeInformation ................................................................................................. ..1 Table2. ....... DischargeLocations ..................................................................................................... ..1 Table3. ....... AdministrativeInformation ........................................................................................ ..2 Table4. ....... FinalEffluentLimitations–DischargePoint001(DischargetoGraham’sPond) .. ..8 Table5. ....... EffluentLimitations–DischargePoint002(DischargetoDutchBillCreek) .......... 10 Table6. ...... FinalIrrigation/ReclamationSpecifications–DischargePoint003 ........................ 11 Table7. ...... InterimIrrigation/ReclamationSpecifications–EFF‐003 ....................................... 12 Table8. ...... ComplianceScheduleforFinalIrrigation/ReclamationSpecificationsforTotalNitrogen

....................................................................................................................................... 30

ListofAttachments

AttachmentA–Definitions.............................................................................................................................................A‐1AttachmentB–MapOfOccidentalWastewaterTreatmentPlant................................................................B‐1AttachmentC–FacilityFlowSchematic...................................................................................................................C‐1AttachmentD–StandardProvisions.........................................................................................................................D‐1AttachmentE–MonitoringandReportingProgram(MRP)............................................................................E‐1AttachmentF–FactSheet...............................................................................................................................................F‐1

I. FACILITYINFORMATION

InformationdescribingtheOccidentalCountySanitationDistrictWastewaterTreatmentFacility(hereinafterFacility)issummarizedinTable1ofthisOrderandinsectionsIandIIoftheFactSheet(AttachmentF).SectionIoftheFactSheetalsoincludesinformationregardingtheFacility’spermitapplication.

II. FINDINGS

TheCaliforniaRegionalWaterQualityControlBoard,NorthCoastRegion(hereinafterRegionalWaterBoard),finds:

A. LegalAuthorities.ThisOrderisissuedpursuanttosection402ofthefederalCleanWaterAct(CWA)andimplementingregulationsadoptedbytheU.S.EnvironmentalProtectionAgency(USEPA)andchapter5.5,division7oftheWaterCode(commencingwithsection13370).ItshallserveasaNPDESpermitforpointsourcedischargesfromthisFacilitytosurfacewaters.ThisOrderalsoservesasWasteDischargeRequirements(WDRs)pursuanttoarticle4,chapter4,division7oftheWaterCode(commencingwithsection13260).

B. BasisandRationaleforRequirements.TheRegionalWaterBoarddevelopedtherequirementsinthisOrderbasedoninformationsubmittedaspartofthePermittee’sapplicationforpermitrenewal,monitoringdatacollectedandsubmittedduringthetermofthePermittee’spreviousOrder,andotheravailableinformation.TheFactSheet(AttachmentF)containsinformationandrationalefortherequirementsinthisOrder,andisherebyincorporatedintothisOrderandconstitutestheFindingsforthisOrder.AttachmentsAthroughEarealsoincorporatedintothisOrder.

C. ProvisionsandRequirementsImplementingStateLaw.Theprovisions/requirementsinsubsectionsIII.E,III.F,IV.B,IV.C,V.B,VI.C.1.g,VI.C.5.a,VI.C.5.d,andVI.C.7.aofthisOrder,andsectionsVI.,VII.,VIII.B,X.D.2,X.D.3.h,andX.EoftheMRPareincludedtoimplementstatelawonly.Theseprovisions/requirementsarenotrequiredorauthorizedunderthefederalCWA;consequently,violationsoftheseprovisions/requirementsarenotsubjecttotheenforcementremediesthatareavailableforNPDESviolations.

D. NotificationofInterestedParties.TheRegionalWaterBoardhasnotifiedthePermitteeandinterestedagenciesandpersonsofitsintenttoprescribeWasteDischargeRequirementsforthedischargeandhasprovidedthemwithanopportunitytosubmittheirwrittencommentsandrecommendations.DetailsofthenotificationareprovidedintheFactSheetofthisOrder.

E. ConsiderationofPublicComment.TheRegionalWaterBoard,inapublicmeeting,heardandconsideredallcommentspertainingtothedischarge.DetailsofthePublicHearingareprovidedintheFactSheetofthisOrder.

III. DISCHARGEPROHIBITIONS

A. ThedischargeofanywastenotdisclosedbythePermitteeornotwithinthereasonablecontemplationoftheRegionalWaterBoardisprohibited.

B. Creationofpollution,contamination,ornuisance,asdefinedbysection13050oftheWaterCodeisprohibited.

C. Thedischargeofsludgeordigestersupernatantisprohibited,exceptasauthorizedundersectionVI.C.5.cofthisOrder(SludgeDisposalandHandlingRequirements).

D. Thedischargeorreclamationuseofuntreatedorpartiallytreatedwaste(receivingalowerleveloftreatmentthandescribedinsectionII.AoftheFactSheet)fromanywherewithinthecollection,treatment,ordisposalsystemsisprohibited,exceptasprovidedforinAttachmentD,StandardProvisionG(Bypass).

E. Anysanitaryseweroverflow(SSO)thatresultsinadischargeofuntreatedorpartiallytreatedwastewaterto(a)watersoftheState,(b)groundwater,or(c)land,thatcreatespollution,contamination,ornuisance,asdefinedinWaterCodesection13050(m)isprohibited.

F. ThedischargeofwastetolandthatisnotownedbyorunderagreementtousebythePermitteeisprohibited,exceptforuseforfiresuppressionasprovidedintitle22,sections60307(a)and60307(b)oftheCaliforniaCodeofRegulations(CCR).

G. ThedischargeofwasteatanypointnotdescribedinsectionII.BoftheFactSheetorregulatedbyapermitissuedbytheStateWaterResourcesControlBoard(StateWaterBoard)oranotherRegionalWaterBoardisprohibited.

H. TheaverageannualdryweatherflowofwasteintotheFacilityinexcessofdesignflowof0.05mgdisprohibited.Averageannualdryweatherflowisthearithmeticmeanoftheinfluentflowforthefourconsecutivelowestflowmonthsinacalendaryear.

I. ThedischargeofwastewatereffluentfromtheFacilitytoDutchBillCreekoritstributariesisprohibitedduringtheperiodfromMay15throughSeptember30ofeachyear.

J. DuringtheperiodofOctober1throughMay14ofeachyear,dischargesofwastewatertoDutchBillCreekwhichistributarytotheRussianRivershallnotexceedonepercentof

theflowofDutchBillCreek,asmeasuredattheCampMeekerbridge.ForpurposesofthisOrder,compliancewiththisdischargeratelimitationisdeterminedasfollows:

1. Thedischargeoftreatedwastewatershallbeadjustedatleastoncedailytoavoidexceeding,totheextentpracticable,onepercentofthemostrecentdailyflowmeasurementoftheDutchBillCreekattheCampMeekerBridge,and

2. InnocaseshallthetotalvolumeoftreatedwastewaterdischargedinacalendarmonthexceedonepercentofthetotalvolumeofDutchBillCreekattheCampMeekerbridgeinthesamecalendarmonth.

Duringperiodsofdischarge,thegageshallbereadatleastoncedaily,andthedischargeflowrateshallbesetfornogreaterthanonepercentoftheflowofDutchBillCreekattheCampMeekerBridgeatthetimeofthedailyreading.Atthebeginningofthedischargeseason,thefirstmonthlyflowcomparisonsshallbedeterminedfromthedatewhenthedischargecommencedtotheendofthecalendarmonth.Attheendofthedischargeseason,thefinalmonthlyflowvolumeshallbedeterminedfromthefirstdayofthecalendarmonthtothedatewhenthedischargeendedfortheseason.

K. ThedischargeofanyradiologicalorbiologicalwarfareagentintowatersofthestateisprohibitedunderWaterCodesection13375.

IV. EFFLUENTLIMITATIONSANDDISCHARGESPECIFICATIONS

A. EffluentLimitations

1. FinalEffluentLimitations–DischargePoint001(DischargetoGraham’sPond)

a. Thedischargeofadvancedtreatedwastewater,asdefinedbythenumericallimitationsbelow,shallmaintaincompliancewiththefollowingeffluentlimitationsatDischargePoint001,withcompliancemeasuredatMonitoringLocationEFF‐001asdescribedintheMonitoringandReportingProgram(MRP)(AttachmentE).Theadvancedtreatedwastewatershallbeadequatelyoxidized,filtered,anddisinfectedasdefinedintitle22,division4,chapter3,oftheCCR.

Table4. FinalEffluentLimitations–DischargePoint001(DischargetoGraham’sPond)

Parameter Units

EffluentLimitations

AverageMonthly1

AverageWeekly1

MaximumDaily1

InstantaneousMinimum1

InstantaneousMaximum1

BiochemicalOxygenDemand5‐day@20°C(BOD5)

mg/L 10 15 ‐‐‐ ‐‐‐ ‐‐‐

lbs/day2, 4.2 6.3 ‐‐‐ ‐‐‐ ‐‐‐

TotalSuspendedSolids(TSS)

mg/L 10 15 ‐‐‐ ‐‐‐ ‐‐‐

lbs/day2 4.2 6.3 ‐‐‐ ‐‐‐ ‐‐‐

pH StandardUnits

‐‐‐ ‐‐‐ ‐‐‐ 6.5 8.5

Copper,TotalRecoverable

µg/L 3.6 ‐‐‐ 7.8 ‐‐‐ ‐‐‐

Lead,TotalRecoverable µg/L 0.65

‐‐‐1.5 ‐‐‐ ‐‐‐

Silver,TotalRecoverable µg/L 0.5

‐‐‐1.0 ‐‐‐ ‐‐‐

Dichlorobromo‐methane

µg/L 0.56‐‐‐

1.3 ‐‐‐ ‐‐‐

Chlorodibromo‐methane µg/L 0.41

‐‐‐0.8 ‐‐ ‐‐‐

Bis(2‐EthylHexyl)Phthalate µg/L 1.8

‐‐‐4.5 ‐‐‐ ‐‐‐

Chlorine,TotalResidual, mg/L 0.01

‐‐‐0.02 ‐‐‐ ‐‐‐

Ammonia,TotalasN mg/L 1.2 ‐‐‐ 2.1 ‐‐‐ ‐‐‐NitrateasN mg/L 10 ‐‐‐ 20 ‐‐‐ ‐‐‐TableNotes:1.SeeDefinitionsinAttachmentAandComplianceDeterminationdiscussioninsectionVIIofthisOrder.2. Mass‐basedeffluentlimitationsarebasedonthedesignflowoftheFacilityof0.05mgdandapplyduringperiodsofdischargetosurfacewaters

(Graham’sPond).SeesectionVII.HofthisOrderregardingcompliancewithmass‐basedeffluentlimitations.

b. PercentRemoval.TheaveragemonthlypercentremovalofBOD5andTSSshallnotbelessthan85percent.PercentremovalshallbedeterminedfromthemonthlyaveragevalueofinfluentwastewaterconcentrationincomparisontothemonthlyaveragevalueofeffluentconcentrationmeasuredatMonitoringLocationEFF‐001forthesameconstituentoverthesametimeperiodasmeasuredatMonitoringLocationsINF‐001.

c. Disinfection.DisinfectedeffluentdischargedatDischargePoint001,withcompliancemeasuredatMonitoringLocationEFF‐001,shallnotcontaincoliformbacteriainexcessofthefollowingconcentrations:

i. ThemedianconcentrationshallnotexceedanMPNof2.2per100mL,usingthebacteriologicalresultsofthelast7daysforwhichanalyseshavebeencompleted1;and

ii. ThenumberofcoliformbacteriashallnotexceedanMPNof23per100mLinmorethanonesampleinany30‐dayperiod.

iii. NosinglesampleshallexceedanMPNof240totalcoliformbacteriaper100mL.

d. SettleableSolids.Effluentshallnotcontainmeasurablelevelsofsettleablesolids,usingananalyticalmethodwithaminimumdetectionlevelof0.1mL/L.

e. AcuteToxicity.ThereshallbenoacutetoxicityintreatedwastewaterdischargedtoDutchBillCreekoritstributaries,includingGraham’sPond.ThePermitteewillbeconsideredincompliancewiththislimitationwhenthesurvivalofaquaticorganismsina96‐hourbioassayofundilutedeffluentcomplieswiththefollowing:

i. Minimumforanyonebioassay:70percentsurvival;and

ii. Medianforanythreeormoreconsecutivebioassays:atleast90percentsurvival.

CompliancewiththiseffluentlimitationshallbedeterminedinaccordancewithsectionV.AoftheattachedMRP.

2. FinalEffluentLimitations–DischargePoint002(DischargetoDutchBillCreek)

a. ThePermitteeshallmaintaincompliancewiththefollowingeffluentlimitationsatDischargePoint002,withcompliancemeasuredatMonitoringLocationEFF‐002asdescribedintheattachedMRP.

1 SeesectionVII.HofthisOrderregardingcompliancewithbacteriologicallimitations.

Table5. EffluentLimitations–DischargePoint002(DischargetoDutchBillCreek)

Parameter UnitsEffluentLimitations

AverageMonthly1

AverageWeekly1

MaximumDaily1

InstantaneousMinimum1

InstantaneousMaximum1

pH standardunits

‐‐ ‐‐ ‐‐ 6.5 8.5

TableNotes:1.SeeDefinitionsinAttachmentAandComplianceDeterminationdiscussioninsectionVIIofthisOrder.

3. InterimEffluentLimitations

ThisOrderdoesnotincludeinterimlimitationsfordischargestosurfacewaters.InterimlimitsfordischargestoGraham’sPondarecontainedinaceaseanddesist(CDO)order,currentlyCDONo.R1‐2012‐0102.

B. LandDischargeSpecifications

1. SpecialStudy.AspecialstudyisrequiredtodetermineifirrigationoftheLoades’propertyisatagronomicrates(reclamation)orgreaterthanagronomicrates(landdischarge).SectionVI.C.2.cofthisOrderrequiresthePermitteetoconductaspecialstudytomakethisdetermination.

2. Ifirrigationisatgreaterthanagronomicrates,theIrrigation/ReclamationSpecificationsandRequirementsinsectionIV.C.1,IV.C.2,andIV.C.4(exceptsubsectionsf,m,ands)shallapplyasLandDischargeSpecifications.

C. Irrigation/ReclamationSpecificationsandRequirements–DischargePoint003(AuthorizedReclamationSites2)

1. FinalIrrigation/ReclamationSpecifications.

a. Duringperiodsofdischargetotheirrigationsystem,thePermitteeshallcomplywiththefollowingirrigation/reclamationspecificationsatDischargePoint003asmeasuredatMonitoringLocationEFF‐003:

2 AuthorizedreclamationsitesmeanssiteswhichhavebeenevaluatedforCEQAcomplianceandaddressedinthePermittee’stitle22RecycledWaterEngineeringReportand

approvedbytheStateDepartmentofPublicHealthandRegionalWaterBoard.

Table6. FinalIrrigation/ReclamationSpecifications–DischargePoint003

AverageMonthly1

AverageWeekly1

MaximumDaily1

BiochemicalOxygenDemand5‐day@20°C(BOD5)

mg/L 30 45 60

TotalSuspendedSolids(TSS) mg/L 50 65 80

SettleableSolids mg/L 0.1 ‐‐‐ 0.2pH pHUnits 6.0‐9.0TotalNitrogen,asN mg/L 10 ‐‐‐ 20

b. DisinfectionSpecificationsforIrrigation/ReclamationoftheLoades’IrrigationSite.Thedisinfectedeffluent,sampledatMonitoringLocationEFF‐001,shallnotcontainconcentrationsoftotalcoliformbacteriaexceedingthefollowingconcentrations:

i. ThemedianconcentrationsshallnotexceedaMostProbableNumber(MPN)of23per100milliliters,usingthebacteriologicalresultsofthelastsevendaysforwhichanalyseshavebeencompleted3;and

ii. ThenumberofcoliformbacteriashallnotexceedanMPNof240per100millilitersinmorethanonesampleinany30‐dayperiod.

2. InterimIrrigation/ReclamationSpecifications

a. BeginningontheeffectivedateofthisOrderandendingJanuary31,2018,thePermitteeshallmaintaincompliancewiththefollowinginterimirrigation/reclamationspecificationsatDischargePoint003,withcompliancemeasuredatMonitoringLocationEFF‐003,asdescribedintheMRP.Finalirrigation/reclamationspecificationsspecifiedinsectionIV.C.1.a(Table7)becomeeffectiveonFebruary1,2018.

3 SeeSectionIXofthisOrderregardingcompliancewiththe7‐daymedianrequirement.

Table7. InterimIrrigation/ReclamationSpecifications–EFF‐003

AverageMonthly1

AverageWeekly1

MaximumDaily1

TotalNitrogen,asN mg/L ‐‐‐ ‐‐‐ 25

1. ReclamationRequirements.IfthespecialstudyidentifiedinsectionVI.C.2.cdeterminesthatirrigationoftheLoades’propertyisatorbelowagronomicrates,thePermitteeshallcomplywithapplicablestateandlocalrequirementsregardingtheproductionanduseofreclaimedwastewater,includingrequirementsofWaterCodesections13500–13577(WaterReclamation)andCaliforniaDepartmentofPublicHealth(CDPH)regulationsattitle22,sections60301–60357oftheCaliforniaCodeofRegulations(WaterRecyclingCriteria).

2. Irrigation/ReclamationRequirements.ThePermitteeshallcomplywiththefollowingirrigation/reclamationrequirements:

a. ThePermitteeshallproperlyinstall,operate,andmaintaintheirrigationsystemtoensurecompliancewithallrequirementsofthisOrder.

b. ThePermitteeshallconductperiodicinspectionsoftheirrigationsystem,facilities,andoperationstomonitorandensurecompliancewiththeconditionsofthisOrder.

c. ThePermitteeshallreportallviolationsofthisOrderinthePermittee’srecycledwater/irrigationmonitoringreports,includingincidentalrunoffeventsthatthePermitteeisawareof.

d. ThePermitteeshallminimizethepotentialforsurfacerunoffofrecycledwater.TheRegionalWaterBoardbutrecognizesthatevenwithdiligentimplementationofbestmanagementpractices(BMPs),incidentalrunoffeventsmayoccuronoccasion.Incidentalrunoffisdefinedasunintendedsmallamountsofrunofffromrecycledwateruseareaswhereagronomicratesandappropriatebestmanagementpracticesarebeingimplemented.Examplesofincidentalrunoffincludeunintended,minimalover‐sprayfromsprinklersthatescapestherecycledwateruseareaoraccidentalbreakageofasprinklerheadonaproperlymaintainedirrigationsystem.Waterleavingairrigation/recycledwateruseareaisnotconsideredincidentalifitispartofthefacilitydesign,ifitisduetoexcessiveapplication,ifitisduetointentionaloverfloworapplication,or

ifitisduetonegligence.Incidentalrunoffeventsaretypicallyinfrequent,lowvolume,accidental,notduetoapatternofneglectorlackofoversight,andarepromptlyaddressed.

TheRegionalWaterBoardrecognizesthatsuchminorviolationsareunavoidableandpresentalowrisktowaterquality.Allrunoffincidents,includingincidentalrunoffshallbesummarizedinthePermittee’srecycledwatermonitoringreports.Enforcementactionshallbeconsideredforrunoffthatisnotincidental,inadequateresponsebythePermittee,repeatedrunoffincidentsthatwerewithinthePermittee’scontrol,whereincidentalrunoffcausesviolationsofwaterqualityobjectives,incidentsthatcreateaconditionofpollutionornuisance,anddischargesthatreachsurfacewatersinviolationofDischargeProhibitionsinsectionIIIofthisOrderand/orReclamationRequirementsspecifiedinsectionIV.C.4ofthisOrder.

e. Theuseoftreatedeffluentforirrigationshallnotresultinunreasonablewasteofwater.

f. AlluseoftreatedeffluentforirrigationprovidedpursuanttothisOrdershallbetreatedandmanagedinconformancewithallapplicableprovisionsoftheRecycledWaterPolicy.

g. Thedischargeoruseoftreatedeffluentforirrigationshallnotcauseorcontributetoanexceedanceofanyapplicablewaterqualitystandard.ThePermitteeshallberesponsibleforensuringthatallrecycledwatermeetsalltermsandconditionsofthisOrder,includingthequalitystandardsinsectionsIVandVIofthisOrder.

h. ThePermitteeshalldiscontinuealldeliveryoftreatedeffluentforirrigationduringanyperiodthatthereisreasontobelievethattherequirementsforuseasspecifiedinthisOrderortherequirementsofCDPHorUSEPAarenotbeingmet.Thedeliveryoftreatedeffluentforirrigationshallnotresumeuntilallconditionshavebeencorrected.

i. Disinfectedsecondaryrecycledwatershallnotbeirrigatedwithin100feet,anddisinfectedtertiaryrecycledwatershallnotbeirrigatedwithin50feet,ofanydomesticwatersupplywellordomesticwatersupplysurfaceintake,unlessthetechnicalrequirementsspecifiedinCCRtitle22,section60310(a)havebeenmetandapprovedbyCDPH.

j. Theuseoftreatedeffluentforirrigationshallnotcausedegradationofanywatersupply.

k. Areasirrigatedwithtreatedeffluentshallbemanagedtopreventpondingandconditionsconducivetotheproliferationofmosquitoesandotherdiseasevectors,andtoavoidcreationofapublicnuisanceorhealthhazard.Thefollowingpracticesshallbeimplemented,ataminimum:

i. Irrigationwatershallinfiltratecompletelywithina48‐hourperiod;and

ii. Low‐pressureandunpressurizedpipelinesandditchesthatmaybeaccessibletomosquitoesshallnotbeusedtostorerecycledwater.

l. Allareaswheretreatedeffluentisusedforirrigationthatareaccessibletothepublicshallbepostedwithsignsthatarevisibletothepublic,inasizenolessthan4incheshighby8incheswidethatincludethefollowingwording:‘RECYCLEDWATER–DONOTDRINK’.[CCRtitle22,section60310(g)]EachsignshalldisplayaninternationalsymbolsimilartothatshowninCCRtitle22,Figure60310‐A.Thesewarningsignsshallbepostedatleastevery500feetwithaminimumofasignateachcornerandaccessroad.CDPHmayacceptalternativesignageorwording,oraneducationalprogram,providedthattheapplicantdemonstratestoCDPHthatthealternativeapproachwillassureanequivalentdegreeofpublicnotification.

m. Theseasonalnutritiveloadingofthetreatedeffluentusedforirrigation,includingthenutritivevalueoforganicandchemicalfertilizersandofthetreatedeffluent,shallnotexceedthenutritivedemandofthelandscape.

n. Treatedeffluentusedforirrigationshallnotbeallowedtoescapetherecycledwateruseareasintheformofsurfacerunoff.[CCRtitle22,section60310(e)]However,incidentalrunoffofrecycledwater,asdescribedinsectionIV.A.4.d,above,isnotaviolationofthisOrder.Whereappropriate,practicesandstrategiestopreventtheoccurrenceofrunoffshallinclude,butnotbelimitedto:

i. Aminimum50‐footsetbacktoallsurfacewatersorprovidewrittendocumentationofappropriatebestmanagementpracticesthatwillbeimplementedtopreventorminimizethepotentialforrunoffdischargingtosurfacewater;

ii. ImplementationofanOperationsandMaintenancePlanthatprovidesfordetectionofleaks(forexamplefromsprinklerheads),andcorrectionwithin72hoursoflearningthatrunoff,orpriortoreleaseof1,000gallons,whichevercomesfirst;

iii. Properdesignandaimofsprinklerheads;

iv. Properdesignandoperationoftheirrigationsystem;

v. Refrainingfromapplicationduringprecipitationevents;

vi. Applicationatanagronomicratethatdoesnotexceedthewaterornutrientdemandofthecroporvegetationbeingirrigated;

vii. Useofrepeatstarttimesandmultiplewaterdaystoincreaseirrigationefficiencyandreducerunoffpotential;

viii. Maintenanceofirrigationinfrastructure(pipelines,pumps,etc.)topreventandminimizebreakageandleaks;and

ix. Adequateprotectionofalleffluentstoragereservoirsandpondsagainstoverflow,structuraldamage,orareductioninefficiencyresultingfroma25‐year,24‐hourstormorfloodeventorgreater,andnotificationoftheRegionalWaterBoardExecutiveOfficer,ifadischargeoccurs.

o. Useareasthataresprayirrigatedandallowpublicaccessshallbeirrigatedduringperiodsofminimaluse.Considerationshallbegiventoallowmaximumdryingtimepriortosubsequentpublicuse.

p. Directorwindblownspray,mist,orrunofffromirrigationareasshallnotenterdwellings,designatedoutdooreatingareas,orfoodhandlingfacilities,roadways,oranyotherareawherethepublicwouldaccidentallybeexposedtorecycledwater.[CCRtitle22,section60310(e)(3)]

q. Allirrigationequipment,pumps,piping,valves,quickcouplersandoutletsshallbeatypeorsecuredinamannerthatonlypermitsoperationbyauthorizedpersonnelandshallbeappropriatelymarkedtodifferentiatethemfrompotablefacilities.

r. Themainshutoffvalveoftheirrigationsystemmetershallbetaggedwitharecycledwaterwarningsign.Thevalveshallbeequippedwithanappropriatelockingdevicetopreventunauthorizedoperationofthevalve.

s. ThePermitteeshallimplementtherequirementsoftheCaliforniaHealthandSafetyCode(CHSC),section116815regardingtheinstallationofpurplepipe.CHSCsection116815requiresthat“allpipesinstalledaboveorbelowtheground,onorafterJune1,1993,thataredesignedtocarryrecycledwater,shallbecoloredpurpleordistinctivelywrappedwithpurpletape.”Section116815alsocontainsexemptionsthatapplytomunicipalfacilitiesthathaveestablishedalabelingormarkingsystemforrecycledwaterusedontheirpremisesandforwaterdeliveredforagriculturaluse.ThePermitteeshalldocumentcompliancewiththisrequirementonanannualbasisinitsannualmonitoringreport.ThePermitteeshallcontinuetoimplementtherequirementsofCHSCsection116815duringthetermofthisOrder.

D. OtherRequirements

1. DisinfectionProcessRequirementsforChlorineDisinfectionSystem.Treatedeffluentshallbedisinfectedinamannerthatensureseffectivepathogenreduction.Thedisinfectionspecificationsshallbemetattheendofthedisinfectionprocess(DischargePoint001,MonitoringLocationEFF‐001):

a. Thechlorinedisinfectionprocessshallprovideaminimumchlorineresidualof1.5mg/L.

b. ThefollowingdisinfectionprocessrequirementappliesifthePermitteeupgradestheFacilitytoincludeAWTprocessesforcontinueddischargetosurfacewaters(Graham’sPondandDutchBillCreek:

i. WhendischargingtoGraham’sPondand/orDutchBillCreek,thechlorinedisinfectionprocessshallprovideaCTvalue4ofnotlessthan450milligram‐minutesperliteratalltimes.

2. FiltrationProcessRequirementsforAdvancedWastewaterTreatmentSystem

ThefollowingfiltrationprocessrequirementsapplyifthePermitteeupgradestheFacilitytoincludeAWTprocessesforcontinueddischargetosurfacewaters(Graham’sPondandDutchBillCreek):

a. Turbidity.TheeffluentshallatalltimesbefilteredsuchthatthefilteredeffluentdoesnotexceedanyofthefollowingspecificationsatMonitoringLocationEFF‐001priortodischargetothedisinfectionsystem:

i. Anaverageof2NephelometricTurbidityUnits(NTU)duringany24‐hourperiod.

ii. 5NTUmorethan5percentofthetimeduringany24‐hourperiod;and

iii. 10NTUatanytime.

b. Filteredeffluentinexcessoftheturbidityspecificationsshallnotbedischargedtosurfacewaters.FilteredeffluentinexcessofturbidityspecificationsshallbeautomaticallydivertedtoanupstreamtreatmentprocessortoemergencystorageorresultinaplantshutdownassoonasthePermitteeisawareoftheexceedance.

4 TheCTvalueistheproductoftotalchlorineresidualandmodalcontacttimemeasuredatthesameperiod.Themodalcontacttimeistheamountoftimethatelapsedbetween

thetimethatatracer,suchassaltordye,isinjectedintotheinfluentattheentranceofthechlorinationchamberandthetimethatthehighestconcentrationofthetraceris

observedintheeffluentfromthechamber.

ThePermitteeshallprovidenotificationofnon‐compliancewithfiltrationprocessrequirementsasrequiredinProvisionVI.A.2.bofthisOrder.

3. StoragePonds.Pondsusedforthestorageofrecycledwatershallbeconstructedinamannerthatprotectsgroundwater.SectionVI.C.2.dincludesaspecialstudyrequirementforanynewlyaddedpondsforeffluent/recycledwaterstorage.

V. RECEIVINGWATERLIMITATIONS

ReceivingwaterlimitationsarebasedonwaterqualityobjectivescontainedintheBasinPlanandarerequiredtobeaddressedaspartofthisOrder.However,receivingwaterconditionsnotinconformancewithreceivingwaterlimitationsarenotnecessarilyinviolationofthisOrder.CompliancewithreceivingwaterlimitationsshallbemeasuredatmonitoringlocationsdescribedintheMRP(AttachmentE).TheRegionalWaterBoardmayrequireaninvestigationtodeterminecauseandculpabilitypriortoassertingaviolationhasoccurred.

DischargesfromtheFacilityshallnotcausethefollowinginthereceivingwaters:

A. SurfaceWaterLimitations

1. Thedischargeshallnotcausethedissolvedoxygenconcentrationofthereceivingwatertobedepressedbelow7.0mg/L.Additionally,thedischargeshallnotcausethedissolvedoxygencontentofthereceivingwatertofallbelow10.0mg/Lmorethan50percentofthetime,orbelow7.5mg/Lmorethan10percentofthetimeinacalendaryear.Intheeventthatthereceivingwatersaredeterminedtohaveadissolvedoxygenconcentrationoflessthan7.0mg/L,thedischargeshallnotdepressthedissolvedoxygenconcentrationbelowtheexistinglevel.

2. ThedischargeshallnotcausethepHofreceivingwaterstobedepressedbelow6.5norraisedabove8.5.Withinthisrange,thedischargeshallnotcausethepHofthereceivingwaterstobechangedatanytimemorethan0.5unitsfromthatwhichoccursnaturally.

3. Thedischargeshallnotcausetheturbidityofreceivingwaterstobeincreasedmorethan20percentabovenaturallyoccurringbackgroundlevels.

4. Thedischargeshallnotcausereceivingwaterstocontainsuspendedmaterialinconcentrationsthatcausenuisanceoradverselyaffectbeneficialuses.

5. Thedischargeshallnotcausereceivingwaterstocontainfloatingmaterials,includingsolids,liquids,foams,andscum,inconcentrationsthatcausenuisanceoradverselyaffectbeneficialuses.

6. Thedischargeshallnotcausereceivingwaterstocontaintaste‐orodor‐producingsubstancesinconcentrationsthatimpartundesirabletastesorodorstofishfleshor

otheredibleproductsofaquaticorigin,thatcausenuisance,orthatadverselyaffectbeneficialuses.

7. Thedischargeshallnotcausecolorationofreceivingwatersthatcausesnuisanceoradverselyaffectsbeneficialuses.

8. Thedischargeshallnotcausebottomdepositsinreceivingwaterstotheextentthatsuchdepositscausenuisanceoradverselyaffectbeneficialuses.

9. Thedischargeshallnotcauseorcontributeconcentrationsofbiostimulatorysubstancestoreceivingwatersthatpromoteobjectionableaquaticgrowthtotheextentthatsuchgrowthcausesnuisanceoradverselyaffectsbeneficialuses.

10. Thedischargeshallnotcausereceivingwaterstocontaintoxicsubstancesinconcentrationsthataretoxicto,orthatproducedetrimentalphysiologicalresponsesinhumans,plants,animals,oraquaticlife.Compliancewiththisobjectivewillbedeterminedbyuseofindicatororganisms,analysesofspeciesdiversity,populationdensity,growthanomalies,bioassaysofappropriateduration,orotherappropriatemethods,asspecifiedbytheRegionalWaterBoard.

11. ThedischargeshallnotcauseameasurabletemperaturechangeinthereceivingwateratanytimeunlessitcanbedemonstratedtothesatisfactionoftheRegionalWaterBoardthatsuchalterationintemperaturedoesnotadverselyaffectbeneficialuses.

12. Thedischargeshallnotcauseanindividualpesticideorcombinationofpesticidestobepresentinconcentrationsthatadverselyaffectbeneficialuses.Thedischargeshallnotcausebioaccumulationofpesticide,fungicide,woodtreatmentchemical,orothertoxicpollutantconcentrationsinbottomsedimentsoraquaticlifetolevelsthatareharmfultohumanhealth.

13. ThedischargeshallnotcausereceivingwaterstocontainconcentrationsofpesticidesinexcessofthelimitingconcentrationssetforthinTable3‐2oftheBasinPlanorinexcessofmorestringentMaximumContaminantLevels(MCLs)establishedforthesepollutantsintitle22,division4,chapter15,articles4and5.5oftheCCR.

14. Thedischargeshallnotcausereceivingwaterstocontainoils,greases,waxes,orothermaterialsinconcentrationsthatresultinavisiblefilmorcoatingonthesurfaceofthewateroronobjectsinthewater,thatcausenuisance,orthatotherwiseaffectbeneficialuses.

15. ThedischargeshallnotcauseaviolationofanyapplicablewaterqualitystandardforreceivingwatersadoptedbytheRegionalWaterBoardortheStateWaterBoard,asrequiredbythefederalCleanWaterActandregulationsadoptedthereunder.Ifmorestringentapplicablewaterqualitystandardsarepromulgatedorapprovedpursuanttosection303oftheCleanWaterAct,oramendmentsthereto,theRegionalWater

BoardwillreviseandmodifythisOrderinaccordancewithsuchmorestringentstandards.

16. ThedischargeshallnotcauseconcentrationsofchemicalconstituentstooccurinexcessoflimitsspecifiedinTable3‐2oftheBasinPlanorinexcessofmorestringentMCLsestablishedforthesepollutantsintitle22,division4,chapter15,articles4and5.5oftheCCR.

17. Thedischargeshallnotcausereceivingwaterstocontainradionuclidesinconcentrationswhicharedeleterioustohuman,plant,animaloraquaticlife,norwhichresultintheaccumulationofradionuclidesinthefoodwebtoanextentwhichpresentsahazardtohuman,plant,animalorindigenousaquaticlife.

B. GroundwaterLimitations

1. Thecollection,treatment,storage,anddisposalofwastewaterorrecycledwatershallnotcauseorcontributetoastatisticallysignificantdegradationofgroundwaterqualityunlessatechnicalevaluationisperformedthatdemonstratesthatanydegradationthatcouldreasonablybeexpectedtooccur,afterimplementationofallregulatoryrequirementsandreasonablebestmanagementpractices,willnotviolategroundwaterqualityobjectivesorcauseimpactstobeneficialusesofgroundwater.

2. Thecollection,treatment,storage,anddisposaloftreatedwastewaterorrecycledwatershallnotcauseorcontributetolevelsofchemicalconstituentsingroundwaterthatexceedthelevelsspecifiedintitle22,division4,chapter15,article4,section64435oftheCCRorlistedinTable3‐2oftheBasinPlan.

3. Thecollection,treatment,storageanddisposalofthetreatedwastewaterorrecycledwatershallnotcauseorcontributetolevelsofradionuclidesingroundwaterinexcessofthelimitsspecifiedintitle22,division4,chapter15,article5,section64443oftheCCR.

4. Thecollection,treatment,storage,anddisposalofwastewaterorrecycledwatershallnotcausegroundwatertocontaintaste‐orodor‐producingsubstancesinconcentrationsthatcausenuisanceoradverselyaffectbeneficialuses.

VI. PROVISIONS

A. StandardProvisions

1. FederalStandardProvisions.ThePermitteeshallcomplywithallStandardProvisionsincludedinAttachmentDofthisOrder.

2. RegionalWaterBoardStandardProvisions.ThePermitteeshallcomplywiththefollowingRegionalWaterBoardstandardprovisions.Intheeventthereisany

conflict,duplication,oroverlapbetweenprovisionsspecifiedbythisOrder,themorestringentprovisionshallapply.

a. FailuretocomplywithprovisionsorrequirementsofthisOrder,orviolationofotherapplicablelawsorregulationsgoverningdischargesfromthisFacility,maysubjectthePermitteetoadministrativeorcivilliabilities,criminalpenalties,and/orotherenforcementremediestoensurecompliance.Additionally,certainviolationsmaysubjectthePermitteetocivilorcriminalenforcementfromappropriatelocal,state,orfederallawenforcemententities.

b. IntheeventthePermitteedoesnotcomplyorwillbeunabletocomplyforanyreason,withanyprohibition,interimorfinaleffluentlimitation,landdischargespecification,receivingwaterlimitation,orprovisionofthisOrderthatmayresultinasignificantthreattohumanhealthortheenvironment,suchasinundationoftreatmentcomponents,breachofpondcontainment,sanitaryseweroverflow,irrigationrunoff,etc.,thatresultsinadischargetoadrainagechannelorasurfacewater,thePermitteeshallnotifyRegionalWaterBoardstaffwithin24hoursandreportorallyandinwritingtotheRegionalWaterBoardstaffallunauthorizedspillsofwaste.SpillnotificationandreportingshallbeconductedinaccordancewithsectionX.EoftheMonitoringandReportingProgram.

B. MonitoringandReportingProgram(MRP)Requirements

ThePermitteeshallcomplywiththeMRPincludedasAttachmentEtothisOrder,andfuturerevisionsthereto.

C. SpecialProvisions

1. ReopenerProvisions

a. StandardRevisions.IfapplicablewaterqualitystandardsarepromulgatedorapprovedpursuanttoSection303oftheCWA,oramendmentsthereto,theRegionalWaterBoardmayreopenthisOrderandmakemodificationsinaccordancewithsuchrevisedstandards.

b. ReasonablePotential.ThisOrdermaybereopenedformodificationtoincludeaneffluentlimitation,ifmonitoringestablishesthatthedischargecauses,orhasthereasonablepotentialtocauseorcontributeto,anexcursionaboveawaterqualitycriterionorobjectiveapplicabletothereceivingwater.

c. WholeEffluentToxicity.AsaresultofaToxicityReductionEvaluation(TRE),thisOrdermaybereopenedtoincludeachronictoxicitylimitation,anewacutetoxicitylimitation,and/oralimitationforaspecifictoxicantidentifiedintheTRE.Additionally,ifanumericchronictoxicitywaterqualityobjectiveisadoptedbytheStateWaterBoard,thisOrdermaybereopenedtoincludeanumericchronictoxicityeffluentlimitationbasedonthatobjective.

d. 303(d)‐ListedPollutants.Ifanapplicabletotalmaximumdailyload(TMDL)(seeFactSheetsectionIII.C)programisadopted,thisOrdermaybereopenedandeffluentlimitationsforthepollutant(s)thatarethesubjectoftheTMDLwillbemodifiedorimposedtoconformthisOrdertotheTMDLrequirements.

e. WaterEffectsRations(WERs)andMetalTranslators.AdefaultWERof1.0hasbeenusedinthisOrderforcalculatingCTRcriteriaforapplicableprioritypollutantinorganicconstituents.Inaddition,defaultdissolved‐to‐totalmetaltranslatorshavebeenusedtoconvertwaterqualityobjectivesfromdissolvedtototalrecoverablewhendevelopingeffluentlimitationsforcopper.IfthePermitteeperformsstudiestodeterminesite‐specificWERsand/orsite‐specificdissolved‐to‐totalmetaltranslatorsandsubmitsareportthatdemonstratesthatWERortranslatorstudieswereperformedinaccordancewithUSEPAorotherapprovedguidance,thisOrdermaybereopenedtomodifytheeffluentlimitationsfortheapplicableconstituents.

f. Nutrients.ThisOrdercontainsmonitoringrequirementsforammonia,nitrate,andphosphorus.Ifnewwaterqualityobjectivesfornutrientsareestablished,orifmonitoringdataindicatetheneedforeffluentlimitationsforanyoftheseparameters,thisOrdermaybereopenedandmodifiedtoincludenewormodifiedeffluentlimitations,asnecessary.

g. SaltandNutrientManagementPlans.TheRecycledWaterPolicyadoptedbytheStateWaterBoardonFebruary3,2009andeffectiveMay14,2009recognizesthefactthatsomegroundwaterbasinsinthestatecontainsaltsandnutrientsthatexceedorthreatentoexceedwaterqualityobjectivesintheapplicableBasinPlans,andthatnotallBasinPlansincludeadequateimplementationproceduresforachievingorensuringcompliancewiththewaterqualityobjectivesforsaltornutrients.TheRecycledWaterPolicyfindsthattheappropriatewaytoaddresssaltandnutrientissuesisthroughthedevelopmentofregionalorsubregionalsaltandnutrientmanagementplansratherthanthroughimposingrequirementssolelyonindividualrecycledwaterprojects.TheRegionalWaterBoardisdevelopingaplantoaddresssaltandnutrientmanagement.ThisOrdermaybereopenedtoincorporateprovisionsconsistentwithanysaltandnutrientmanagementplan(s)adoptedbytheRegionalWaterBoard.

2. SpecialStudies,TechnicalReportsandAdditionalMonitoringRequirements

a. ToxicityReductionRequirements

i. WholeEffluentToxicity.Inadditiontoanumericlimitationforwholeeffluentacutetoxicity,theMRPofthisOrderrequiresroutinemonitoringforwholeeffluentchronictoxicitytodeterminecompliancewiththeBasinPlan’snarrativewaterqualityobjectivefortoxicity.AsestablishedbytheMRP,ifeitheroftheeffluentlimitationsforacutetoxicityisexceeded(asingle

samplewithlessthan70%survivalorathreesamplemedianoflessthan90%survival)orifthechronictoxicitymonitoringtriggerofeitherasinglesamplemaximumof1.6chronictoxicityunits(TUc)oramonthlymedianof1.0TUc(whereTUc=100/NOEC)5isexceeded,thePermitteeshallconductacceleratedmonitoringasspecifiedinsectionV.oftheMRP.

Resultsofacceleratedtoxicitymonitoringwillindicateaneedtoconductatoxicityreductionevaluation(TRE),iftoxicitypersists;oritwillindicatethatareturntoroutinetoxicitymonitoringisjustifiedbecausepersistenttoxicityhasnotbeenidentifiedbyacceleratedmonitoring.TREsshallbeconductedinaccordancewiththeTREworkplanpreparedbythePermitteepursuanttoSectionVI.C.2.a.iiofthisOrder,below.

ii. ToxicityReductionEvaluationWorkplan.ThePermitteesubmittedaTREworkplantotheRegionalWaterBoardonJanuary15,2009.Thisplanshallbereviewedatleastonceevery5yearsandupdatedasnecessaryinordertoremaincurrentandapplicabletothedischargeanddischargefacilities.ThePermitteeshallnotifytheRegionalWaterBoardofthisreviewandsubmitanyrevisionoftheTREworkplanwitheachReportofWasteDischarge.

TheTREworkplanshalldescribethestepsthePermitteeintendstofollowiftoxicityisdetected,andshouldincludeatleastthefollowingitems:

(a). Adescriptionoftheinvestigationandevaluationtechniquesthatwouldbeusedtoidentifypotentialcausesandsourcesoftoxicity,effluentvariability,andtreatmentsystemefficiency.

(b). Adescriptionofthefacility’smethodsofmaximizingin‐housetreatmentefficiency,goodhousekeepingpractices,andalistofallchemicalsusedintheoperationofthisFacility.

(c). Ifatoxicityidentificationevaluation(TIE)isnecessary,anindicationofthepersonwhowouldconducttheTIEs(i.e.,anin‐houseexpertoranoutsidecontractor).

iii. ToxicityReductionEvaluations(TRE)Implementation.TheTREshallbeconductedinaccordancewiththefollowing:

(a). TheTREshallbeinitiatedwithin30daysofthedateofcompletionoftheacceleratedmonitoringtesting,requiredbySectionsV.A.7andV.B.9oftheMRP,observedtoexceedeithertheacuteorchronictoxicityparameter.

5 SeesectionVII.JofthisOrderregardingcompliancewithchronictoxicitytriggers.

(b). TheTREshallbeconductedinaccordancewiththePermittee’sTREworkplan.

(c). TheTREshallbeinaccordancewithcurrenttechnicalguidanceandreferencematerialincluding,ataminimum,theUSEPAmanualEPA/833B99/002.

(d). TheTREmayendatanystageif,throughmonitoringresults,itisdeterminedthatthereisnolongerconsistenttoxicity.ThePermitteeshallnotifytheRegionalWaterBoardofthisdetermination.

(e). ThePermitteemayinitiateaTIEaspartoftheTREprocesstoidentifythecause(s)oftoxicity.TIEsshallbeconductedinaccordancewithcurrenttechnicalguidanceandreferencematerial,including,ataminimum,thePermitteeshallusetheUSEPAacuteandchronicmanuals,EPA/600/6‐91/005F(PhaseI),EPA/600/R‐92/080(PhaseII),andEPA‐600/R‐92/081(PhaseIII).

(f). Astoxicsubstancesareidentifiedorcharacterized,thePermitteeshallcontinuetheTREbydeterminingthesource(s)andevaluatingalternativestrategiesforreducingoreliminatingthesubstancesfromthedischarge.Allreasonablestepsshallbetakentoreducetoxicitytolevelsconsistentwithchronictoxicityparameters.

(g). ManyrecommendedTREelementsaccompanyrequiredeffortsofsourcecontrol,pollutionprevention,andstormwatercontrolprograms.TREeffortsshouldbecoordinatedwithsuchefforts.Topreventduplicationofefforts,evidenceofcomplyingwithrequirementsofrecommendationsofsuchprogramsmaybeacceptabletocomplywithrequirementsoftheTRE.

(h). TheRegionalWaterBoardrecognizesthatchronictoxicitymaybeepisodicandidentificationofareductionofsourcesofchronictoxicitymaynotbesuccessfulinallcases.ConsiderationofenforcementactionbytheRegionalWaterBoardwillbebasedinpartonthePermittee’sactionsandeffortstoidentifyandcontrolorreducesourcesofconsistenttoxicity.

b. TechnicalReport(s)RegardingExistingRecycledWaterUseSite.ThePermitteecurrentlyprovidesrecycledwatertooneirrigationsiteontheLoades’property.Technicalinformationisneededtodemonstratewhethereffluentisbeingreclaimed(e.g.,appliedathydraulicandnutrientagronomicrates)ordischargedatratesthatconstitutedisposal.Within90daysoftheeffectivedateofthisOrder,thePermitteeshallsubmit,forapprovalbytheRegionalWaterBoardExecutiveOfficer,aworkplandescribingthePermittee’splanandtimescheduleforassessingcurrentirrigationpractices.TheWorkplanshallleadtothe

submittaloftechnicalinformationthatissufficientto(1)determinewhetherornotrecycledwaterisbeingappliedatnutrientandhydraulicagronomicrates,(2)describeirrigationBMPsbeingimplemented,(3)evaluateifBMPsareadequatetopreventandminimizethepotentialforsurfacerunoffandimpactstogroundwater,and(4)identifyanyadditionalBMPsthatareneededtomeettherequirementsofthisOrder.

c. ReceivingWaterSpecialStudy.Within120daysoftheeffectivedateofthis

Order,thePermitteeshallsubmit,forapprovalbytheRegionalWaterBoardExecutiveOfficer,aworkplandescribingamonitoringstudytoassesstheeffectsofthedischargefromGraham’sPondonDutchBillCreek.TheWorkplanshallincludeatimescheduleforcompletingthestudyandsubmittalofmonitoringandstudyresultstotheExecutiveOfficer.

d. StoragePondTechnicalReport.Priortoconstructionofanynewwastewater

storagepondsoruseofanyexistingpondforstorageofrecycledwater,thePermitteeshallsubmittotheRegionalWaterBoardExecutiveOfficerforreviewandapproval,atechnicalreportthatincludesdesignproposalsandatechnicalevaluationthatdemonstratesthattheponddesigncomplieswiththeWaterCodeandtitle27oftheCaliforniaCodeofRegulationsandisprotectiveofgroundwaterquality.TheponddesignandoperationplanmustincludefeaturesandBMPstoprotectgroundwaterandpreventexceedancesofgroundwaterqualityobjectives.

3. BestManagementPracticesandPollutionPrevention

a. PollutantMinimizationProgram(PMP)

ThePermitteeshall,asrequiredbytheExecutiveOfficer,developandconductaPMPasfurtherdescribedbelowwhenthereisevidence(e.g.,sampleresultsreportedasdetected,butnotquantified(DNQ)whentheeffluentlimitationislessthanthemethoddetectionlimit(MDL),sampleresultsfromanalyticalmethodsmoresensitivethanthosemethodsrequiredbythisOrder,presenceofwholeeffluenttoxicity,healthadvisoriesforfishconsumption,resultsofbenthicoraquaticorganismtissuesampling)thataprioritypollutantispresentintheeffluentaboveaneffluentlimitationandeither:

i. AsampleresultisreportedasDNQandtheeffluentlimitationislessthantheRL;or

ii. AsampleresultisreportedasNDandtheeffluentlimitationislessthantheMDL,usingdefinitionsdescribedinAttachmentAandreportingprotocolsdescribedinMRPsectionX.B.4.

a. ThePMPshallinclude,butnotbelimitedto,thefollowingactionsandsubmittalsacceptabletotheRegionalWaterBoard:

i. Anannualreviewandsemi‐annualmonitoringofpotentialsourcesofthereportableprioritypollutant(s),whichmayincludefishtissuemonitoringandotherbio‐uptakesampling;

ii. Quarterlymonitoringforthereportableprioritypollutant(s)intheinfluenttothewastewatertreatmentsystem;

iii. Submittalofacontrolstrategydesignedtoproceedtowardthegoalofmaintainingconcentrationsofthereportableprioritypollutant(s)intheeffluentatorbelowtheeffluentlimitation;

iv. Implementationofappropriatecost‐effectivecontrolmeasuresforthereportableprioritypollutant(s),consistentwiththecontrolstrategy;and

v. AnannualstatusreportthatshallbesubmittedaspartoftheAnnualFacilityReportdueMarch1sttotheRegionalWaterBoardandshallinclude:

(a) AllPMPmonitoringresultsforthepreviousyear;

(b) Alistofpotentialsourcesofthereportableprioritypollutant(s);

(c) Asummaryofallactionsundertakenpursuanttothecontrolstrategy;and

(d) Adescriptionofactionstobetakeninthefollowingyear.

4. Construction,OperationandMaintenanceSpecifications

a. ThePermitteeshallatalltimesproperlyoperateandmaintainallfacilitiesandsystemsoftreatmentandcontrol(andrelatedappurtenances)thatareinstalledorusedbythePermitteetoachievecompliancewiththisOrder.Properoperationandmaintenanceincludesadequatelaboratoryqualitycontrolandappropriatequalityassuranceprocedures.ThisprovisionrequirestheoperationofbackuporauxiliaryfacilitiesorsimilarsystemsthatareinstalledbythePermitteeonlywhennecessarytoachievecompliancewiththeconditionsofthisOrder.

b. ThePermitteeshallmaintainanupdatedOperationandMaintenance(O&M)ManualfortheFacility.ThePermitteeshallupdatetheO&MManual,asnecessary,toconformtochangesinoperationandmaintenanceoftheFacility.TheO&MManualshallbereadilyavailabletooperatingpersonnelonsiteandforreviewbystateorfederalinspectors.TheO&MManualshallincludethefollowing.

i. DescriptionoftheFacility’sorganizationalstructureshowingthenumberofemployees,dutiesandqualificationsandplantattendanceschedules(daily,weekendsandholidays,part‐time,etc.).Thedescriptionshouldinclude

documentationthatthepersonnelareknowledgeableandqualifiedtooperatethetreatmentfacilitysoastoachievetherequiredleveloftreatmentatalltimes.

ii. Detaileddescriptionofsafeandeffectiveoperationandmaintenanceoftreatmentprocesses,processcontrolinstrumentationandequipment.

iii. Descriptionoflaboratoryandqualityassuranceprocedures.

iv. Processandequipmentinspectionandmaintenanceschedules.

v. Descriptionofsafeguardstoassurethat,shouldtherebereduction,loss,orfailureofelectricpower,thePermitteewillbeabletocomplywithrequirementsofthisOrder.

vi. Descriptionofpreventive(fail‐safe)andcontingency(responseandcleanup)plansforcontrollingaccidentaldischarges,andforminimizingtheeffectofsuchevents.Theseplansshallidentifythepossiblesources(suchasloadingandstorageareas,poweroutage,wastetreatmentunitfailure,processequipmentfailure,tankandpipingfailure)ofaccidentaldischarges,untreatedorpartiallytreatedwastebypass,andpolluteddrainage.

5. SpecialProvisionsforMunicipalFacilities(POTWsOnly)

a. WastewaterCollectionSystems

i. StatewideGeneralWDRsforSanitarySewerSystems

ThePermitteeshallmaintaincoverageunder,andshallbesubjecttotherequirementsofOrderNos.2006‐0003‐DWQandWQ‐2008‐0002‐EXECandanyfuturerevisionstheretoforoperationofitswastewatercollectionsystem.TheStatewideGeneralWDRsforSanitarySewerSystemsarefurtherdescribedinsectionVII.B.5.aoftheFactSheet.

InadditiontothecoverageobtainedunderOrderNo.2006‐0003,thePermittee’scollectionsystemispartofthetreatmentsystemthatissubjecttothisOrder.Assuch,pursuanttofederalregulationsatsection122.44,title40oftheCodeofFederalRegulations(40CFR),thePermitteemustproperlyoperateandmaintainitscollectionsystem(40CFR122.41(e)),reportanynon‐compliance(40CFR122.41(l)(6)and(7)),andmitigateanydischargefromthecollectionsysteminviolationofthisOrder(40CFR122.41(d)).

ii. SpillsandSanitarySewerOverflows

(a) ThePermitteeshalltakeallfeasiblestepstostopspillsandsanitaryseweroverflows(SSOs)assoonaspossible.Allreasonablestepsshouldbetakentocollectspilledmaterialandprotectthepublicfromcontactwithwastesorwaste‐contaminatedsoilorsurfaces.

(b) ThePermitteeshallreportorally6andinwritingtotheRegionalWaterBoardstaffallSSOsandunauthorizedspillsofwaste.SpillnotificationandreportingshallbeconductedinaccordancewithsectionX.EoftheMonitoringandReportingProgram.

b. SourceControlandPretreatmentProvisions

ThePermitteeshallperformsourcecontrolfunctionsandprovideasummaryofsourcecontrolactivitiesconductedintheAnnualFacilityReport(dueMarch1sttotheRegionalWaterBoard).Sourcecontrolfunctionsandrequirementsshallincludethefollowing:

i. Implementthenecessarylegalauthoritiestomonitorandenforcesourcecontrolstandards,restrictdischargesoftoxicmaterialstothecollectionsystemandinspectfacilitiesconnectedtothesystem.

ii. IfwastehaulersareallowedtodischargetotheFacility,establishawastehaulerpermitsystem,tobereviewedbytheExecutiveOfficer,toregulatewastehaulersdischargingtothecollectionsystemorFacility.

iii. ConductawastesurveytoidentifyalldischargersthatmightdischargepollutantsthatcouldpassthroughorinterferewiththeoperationorperformanceoftheFacility.Thewastesurveyisrequiredduringthe12‐monthperiodthatbeginsonJuly1,2013,andtheresultsofthewastesurveyshallbesubmittedtotheRegionalWaterBoardinawrittenreportnolaterthanOctober1,2014.

iv. Performpublicoutreachtoeducateindustrial,commercial,andresidentialusersabouttheimportanceofpreventingdischargesofindustrialandtoxicwastestothewastewatertreatmentplant.

v. Performongoinginspectionsandmonitoring,asnecessary,toensureadequatesourcecontrol.

vi. TheRegionalWaterBoardretainstherighttotakelegalactionagainstanindustrialuserand/orthePermitteewhereauserfailstomeettheapprovedapplicablefederal,state,orlocalpretreatment.

vii. TheRegionalWaterBoardmayamendthisOrder,atanytime,torequirethePermitteetodevelopandimplementanindustrialpretreatmentprogram

6 OralreportingmeansdirectcontactwithaRegionalWaterBoardstaffperson.Theoralreportmaybegiveninpersonorbytelephone.Afterbusinesshours,oralcontactmust

bemadebycallingtheCaliforniaEmergencyManagementAgencyat(800)852‐7550ortheRegionalWaterBoardspillofficerat(707)576‐2220.

pursuanttotherequirementsof40CFRPart403iftheRegionalWaterBoardfindsthattheFacilityreceivespollutantsfromanIUthatissubjecttopretreatmentstandards,orifothercircumstancessowarrant.

c. SludgeDisposalandHandlingRequirements

i. Sludge,asusedinthisOrder,meansthesolid,semisolid,andliquidresiduesremovedduringprimary,secondary,oradvancedwastewatertreatmentprocesses.Solidwastereferstogritandscreeningsgeneratedduringpreliminarytreatment.Biosolidsreferstosludgethathasbeentreated,tested,anddemonstratedtobecapableofbeingbeneficiallyandlegallyusedpursuanttofederalandstateregulationsasasoilamendmentforagriculture,silviculture,horticulture,andlandreclamationactivities.

ii. Allcollectedsludgesandothersolidwasteremovedfromliquidwastesshallberemovedfromscreens,sumps,ponds,andtanksasneededtoensureoptimalplantoperationanddisposedofinaccordancewithapplicablefederalandStateregulations.

iii. Theuseanddisposalofbiosolidsshallcomplywithallofthelandapplicationanddisposalrequirementsin40CFR503,whichareenforceablebytheUSEPA,nottheRegionalWaterBoard.IfduringthelifeofthisOrder,theStateacceptsprimacyforimplementationof40CFR503,theRegionalWaterBoardmayalsoinitiateenforcementwhereappropriate.

iv. Sludgeorbiosolidsthataredisposedofinamunicipalsolidwastelandfillorusedasdailylandfillcovershallmeettheapplicablerequirementsof40CFR258.Intheannualself‐monitoringreport,thePermitteeshallreporttheamountofsludgeplacedinalandfillandthelandfill(s)whichreceivedthesludgeorbiosolids.

v. ThebeneficialuseofbiosolidsbyapplicationtolandassoilamendmentisnotcoveredorauthorizedbythisOrder.BiosolidsthatareappliedtolandassoilamendmentbythePermitteewithintheNorthCoastRegionshallcomplywithStateWaterBoardWaterQualityOrderNo.2004‐12‐DWQ(GeneralWasteDischargeRequirementsfortheDischargeofBiosolidstoLandasaSoilAmendmentinAgricultural,Silvicultural,Horticultural,andLandReclamationActivities)orotherpermitsissuedbytheRegionalWaterBoard.

vi. ThePermitteeshalltakeallreasonablestepstopreventandminimizeanysludgeuseordisposalinviolationofthisOrderthatmayadverselyaffecthumanhealthortheenvironment.

vii. Solidsandsludgetreatment,storage,anddisposalorreuseshallnotcreateanuisance,suchasobjectionableodorsorflies,andshallnotresultingroundwatercontamination.

viii. Solidsandsludgetreatmentandstoragesitesshallhavefacilitiesadequatetodivertsurfacewaterrunofffromadjacentareas,toprotecttheboundariesofthesitefromerosion,andtopreventdrainagefromthetreatmentandstoragesite.Adequateprotectionisdefinedasprotectionfromatleasta100‐yearstorm.

ix. Thedischargeofsewagesludgeandsolidsshallnotcausewastematerialtobeinapositionwhereitis,orcanbe,conveyedfromthetreatmentandstoragesitesanddepositedinthewatersoftheState.

d. DischargeofBiosolids

ForthedischargeofbiosolidsfromtheFacility,thePermitteeshallcomplywiththefollowingrequirements:

i. StatewideGeneralWDRsforDischargeofBiosolidstoLand

Ifapplicable,thePermitteeshallobtainauthorizationtodischargeunderandmeettherequirementsoftheStateWaterBoardWaterQualityOrderNo.2004‐0012‐DWQGeneralWasteDischargeRequirementsfortheDischargeofBiosolidstoLandorUseasaSoilAmendmentinAgricultural,Silvicultural,Horticultural,andLandReclamationActivities.Forexistingdischargesofbiosolidstoland,thePermitteeshallsubmitaNoticeofIntenttoComplywithin180daysoftheeffectivedateofthisOrder.Forfuturedischargesofbiosolidstoland,thePermitteeshallsubmitaNoticeofIntenttoComplyinaccordancewiththeenrollmentrequirementsofOrderNo.2004‐0012‐DWQ;or

ii. Alternatively,thePermitteemaydisposeofbiosolidsatanotherappropriatelypermittedfacility.

iii. NewsludgetreatmentandstoragefacilitiesmustcomplywiththeWaterCodeandtitle27oftheCCRrequirementsfortheprotectionofwaterquality.

e. OperatorCertification

Supervisorsandoperatorsofmunicipalwastewatertreatmentfacilities(WWTFs)shallpossessacertificateofappropriategradeinaccordancewithtitle23,CCR,section3680.TheStateWaterBoardmayacceptexperienceinlieuofqualificationtraining.InlieuofaproperlycertifiedWWTFoperator,theStateWaterBoardmayapproveuseofawatertreatmentfacilityoperatorofappropriategradecertifiedbytheCaliforniaDepartmentofPublicHealth(CDPH)wherewaterreclamationisinvolved.

f. AdequateCapacity

IftheFacilityoreffluentdisposalareaswillreachcapacitywithin4years,thePermitteeshallnotifytheRegionalWaterBoard.Acopyofsuchnotificationshallbesenttoappropriatelocalelectedofficials,localpermittingagencies,andthepress.Factorstobeevaluatedinassessingreservecapacityshallinclude,ataminimum,(1)comparisonofthewetweatherdesignflowwiththehighestdailyflow,and(2)comparisonoftheaveragedryweatherdesignflowwiththelowest30‐dayflow.ThePermitteeshalldemonstratethatadequatestepsarebeingtakentoaddressthecapacityproblem.ThePermitteeshallsubmitatechnicalreporttotheRegionalWaterBoardshowinghowflowvolumeswillbepreventedfromexceedingcapacity,orhowcapacitywillbeincreased,within120daysafterprovidingnotificationtotheRegionalWaterBoard,orwithin120daysafterreceiptofRegionalWaterBoardnotification,thattheFacilitywillreachcapacitywithinfouryears.ThetimeforfilingtherequiredtechnicalreportmaybeextendedbytheRegionalWaterBoard.Anextensionof30daysmaybegrantedbytheExecutiveOfficer,andlongerextensionsmaybegrantedbytheRegionalWaterBoarditself.[CCRtitle23,section2232]

3. OtherSpecialProvisions

a. StormWaterBestManagementPractices(BMPs).BMPstocontrolstormwaterattheFacilityshallbedevelopedandupgraded,asnecessary.IneachannualreportsubmittedtotheRegionalWaterBoard,thePermitteeshalldescribetheeffectivenessofstormwaterBMPsaswellasactivitiestomaintainandupgradetheseBMPsduringthepreviousyear.

4. ComplianceSchedules

a. ComplianceScheduleforFinalIrrigation/ReclamationSpecificationsforTotalNitrogenforIrrigation/Reclamation

ThePermitteeshallcomplywiththefollowingcompliancescheduletoachievecompliancewithfinalirrigation/reclamationspecificationsfortotalnitrogenspecifiedinsectionIV.C.1.a(Table7)ofthisOrder:

Table8. ComplianceScheduleforFinalIrrigation/ReclamationSpecificationsforTotalNitrogen

TaskNumber TaskDescription ComplianceDate

1ThePermitteeshallsubmitforExecutiveOfficerapproval,aworkplanidentifyingaplanforcomplyingwithfinalIrrigation/Reclamation

February1,2014

SpecificationsforTotalNitrogen.

ThePermitteeshallsubmitsemi‐annualreportsidentifyingprogresstowardcompliancewithfinalIrrigation/ReclamationSpecificationsforTotalNitrogen.

August1andFebruary1ofeachyear,beginningAugust1,

3ThePermitteeshallcomplywithfinalIrrigation/ReclamationSpecificationsforTotalNitrogen.

January31,2018

b. CDOComplianceScheduleforCompliancewithEffluentLimitationsatDischargePoint001(DischargetoGraham’sPond)andCompliancewithBasinPlanSeasonalDischargeProhibition.AscheduleforcompliancewithBOD5,TSS,copper,lead,silver,dichlorobromomethane,chlorodibromomethane,andbis(2‐ethylhexyl)phthalate,andammoniaisestablishedinaCDO.ThecurrentCDOisOrderNo.R1‐2012‐0102.

VII. COMPLIANCEDETERMINATION

CompliancewiththeeffluentlimitationscontainedinsectionIVofthisOrderwillbedeterminedasspecifiedbelow.

A. General

CompliancewitheffluentlimitationsforprioritypollutantsshallbedeterminedusingsamplereportingprotocolsdefinedintheMRPofthisOrder.ForpurposesofreportingandadministrativeenforcementbytheRegionalandStateWaterBoards,thePermitteeshallbedeemedoutofcompliancewitheffluentlimitationsiftheconcentrationoftheprioritypollutantinthemonitoringsampleisgreaterthantheeffluentlimitationandgreaterthanorequaltothereportinglevel(RL).

B. MultipleSampleData

WhendeterminingcompliancewithanAMELforprioritypollutants,andmorethanonesampleresultisavailable,thePermitteeshallcomputethearithmeticmeanunlessthedatasetcontainsoneormorereporteddeterminationsof“Detected,butNotQuantified”(DNQ)or“NotDetected”(ND).Inthosecases,thePermitteeshallcomputethemedianinplaceofthearithmeticmeaninaccordancewiththefollowingprocedure.

1. Thedatasetshallberankedfromlowtohigh,rankingthereportedNDdeterminationslowest,DNQdeterminationsnext,followedbyquantifiedvalues(ifany).TheorderoftheindividualNDorDNQdeterminationsisunimportant.

2. Themedianvalueofthedatasetshallbedetermined.Ifthedatasethasanoddnumberofdatapoints,thenthemedianisthemiddlevalue.Ifthedatasethasanevennumberofdatapoints,thenthemedianistheaverageofthetwovaluesaroundthemiddleunlessoneorbothofthepointsareNDorDNQ,inwhichcasethemedianvalueshallbethelowerofthetwodatapointswhereDNQislowerthanavalueandNDislowerthanDNQ.

C. AverageMonthlyEffluentLimitation(AMEL)

Iftheaverage(orwhenapplicable,themediandeterminedbysubsectionBaboveformultiplesampledata)ofdailydischargesoveracalendarmonthexceedstheAMELforagivenparameter,thiswillrepresentasingleviolation,thoughthePermitteewillbeconsideredoutofcomplianceforeachdayofthatmonthforthatparameter(e.g.,resultingin31daysofnon‐complianceina31‐daymonth).IfonlyasinglesampleistakenduringthecalendarmonthandtheanalyticalresultforthatsampleexceedstheAMEL,thePermitteewillbeconsideredoutofcomplianceforthatcalendarmonth.ThePermitteewillonlybeconsideredoutofcompliancefordayswhenthedischargeoccurs.Foranyonecalendarmonthduringwhichnosample(dailydischarge)istaken,nocompliancedeterminationcanbemadeforthatcalendarmonth.

D. AverageWeeklyEffluentLimitation(AWEL)

Iftheaverage(orwhenapplicable,themediandeterminedbysubsectionBaboveformultiplesampledata)ofdailydischargesoveracalendarweekexceedstheAWELforagivenparameter,thiswillrepresentasingleviolation,thoughthePermitteewillbeconsideredoutofcomplianceforeachdayofthatweekforthatparameter,resultingin7daysofnon‐compliance.IfonlyasinglesampleistakenduringthecalendarweekandtheanalyticalresultforthatsampleexceedstheAWEL,thePermitteewillbeconsideredoutofcomplianceforthatcalendarweek.ThePermitteewillonlybeconsideredoutofcompliancefordayswhenthedischargeoccurs.Foranyonecalendarweekduringwhichnosample(dailydischarge)istaken,nocompliancedeterminationcanbemadeforthatcalendarweek.

E. MaximumDailyEffluentLimitation(MDEL)

Ifadailydischarge(orwhenapplicable,themediandeterminedbysubsectionB,above,formultiplesampledataofadailydischarge)exceedstheMDELforagivenparameter,thePermitteewillbeconsideredoutofcomplianceforthatparameterforthat1dayonlywithinthereportingperiod.Forany1dayduringwhichnosampleistaken,nocompliancedeterminationcanbemadeforthatday.

F. InstantaneousMinimumEffluentLimitation

Iftheanalyticalresultofasinglegrabsampleislowerthantheinstantaneousminimumeffluentlimitationforaparameter,thePermitteewillbeconsideredoutofcomplianceforthatparameterforthatsinglesample.Non‐complianceforeachsamplewillbeconsideredseparately(e.g.,theresultsoftwograbsamplestakenwithinacalendardaythatbotharelowerthantheinstantaneousminimumeffluentlimitationwouldresultintwoinstancesofnon‐compliancewiththeinstantaneousminimumeffluentlimitation).

G. InstantaneousMaximumEffluentLimitation

Iftheanalyticalresultofasinglegrabsampleishigherthantheinstantaneousmaximumeffluentlimitationforaparameter,thePermitteewillbeconsideredoutofcomplianceforthatparameterforthatsinglesample.Non‐complianceforeachsamplewillbeconsideredseparately(e.g.,theresultsoftwograbsamplestakenwithinacalendardaythatbothexceedtheinstantaneousmaximumeffluentlimitationwouldresultintwoinstancesofnon‐compliancewiththeinstantaneousmaximumeffluentlimitation).

H. Mass‐BasedEffluentLimitations

Compliancewithmass‐andconcentration‐basedeffluentlimitationsforthesameparametershallbedeterminedseparately.Mass‐basedcalculationsshallusetransferflowrateandeffluentconcentrationmeasuredatEFF‐001(dischargetoGraham’sPond).

1. WeeklyAverage.Compliancewiththeweeklymass‐basedaveragelimitationshallbedeterminedusingthefollowingformula:

lbs./day=8.34*Ce*Q,where

Ce=averageofeffluentconcentrationscollectedduringthecalendarweek(mg/L)

Q=averageflowrateaveragedoverthesamecalendarweek(mgd)

2. MonthlyAverage.Compliancewiththemonthlymass‐basedaveragelimitationshallbedeterminedusingthefollowingformula:

lbs./day=8.34*Ce*Q,where

Ce=averageofeffluentconcentrationscollectedduringthecalendarmonth(mg/L)

Q=averageflowrateaveragedoverthesamecalendarmonth(mgd)

I. BacteriologicalLimitations(TotalColiform)

1. Median.Themedianisthecentraltendencyconcentrationofthepollutant.Thedatasetshallberankedfromlowtohigh,rankingtheNDconcentrationslowest,followedbyquantifiedvalues.Themedianvalueisdeterminedbasedonthenumberofdatapointsintheset.Ifthedatasethasanoddnumberofdatapoints,thenthemedianisthemiddlevalue.Ifthedatasethasanevennumberofdatapoints,themedianistheaverageofthetwomiddlevalues,unlessoneorbothpointsareNDorDNQ,inwhichcasethemedianvalueshallbethelowerofthetwomiddledatapoints.DNQislowerthanadetectedvalue,andNDislowerthanDNQ.

2. Compliancewiththe7‐daymedianwillbedeterminedasarollingmedianduringperiodswhensamplingoccursmorefrequentlythanweekly.Duringperiodswhensamplingisweekly,thisrequirementshallapplytoeachweeklysample.

J. ChronicToxicityTriggers

1. Whenasinglechronictoxicitytestresultisavailableinamonthlymonitoringperiod,compliancewillbedeterminedbycomparingthesingleresulttothemonthlymedianchronictoxicitytriggerof1.0TUc.

2. Ifmultiplechronictoxicitytestresultsareavailableinamonthlymonitoringperiod,

compliancewillbedeterminedbycalculatingthemedianofthetestresultsandcomparingthecalculatedmediantothemonthlymedianchronictoxicitytriggerof1.0TUc,andtheindividualsampleresultswillbecomparedtothesinglesamplechronictoxicitytriggerof1.6TUc.

AttachmentA–Definitions A‐1

ATTACHMENTA–DEFINITIONS

ArithmeticMean():alsocalledtheaverage,isthesumofmeasuredvaluesdividedbythenumberofsamples.Forambientwaterconcentrations,thearithmeticmeaniscalculatedasfollows:

Arithmeticmean==x/n where:xisthesumofthemeasuredambientwaterconcentrations,andnisthenumberofsamples.

AverageMonthlyEffluentLimitation(AMEL):thehighestallowableaverageofdailydischargesoveracalendarmonth,calculatedasthesumofalldailydischargesmeasuredduringacalendarmonthdividedbythenumberofdailydischargesmeasuredduringthatmonth.

AverageWeeklyEffluentLimitation(AWEL):thehighestallowableaverageofdailydischargesoveracalendarweek(SundaythroughSaturday),calculatedasthesumofalldailydischargesmeasuredduringacalendarweekdividedbythenumberofdailydischargesmeasuredduringthatweek.

BioaccumulativePollutants:substancestakenupbyanorganismfromitssurroundingmediumthroughgillmembranes,epithelialtissue,orfromfoodandsubsequentlyconcentratedandretainedinthebodyoftheorganism.

CarcinogenicPollutants:substancesthatareknowntocausecancerinlivingorganisms.

CoefficientofVariation(CV):ameasureofthedatavariabilityandiscalculatedastheestimatedstandarddeviationdividedbythearithmeticmeanoftheobservedvalues.

DailyDischarge:DailyDischargeisdefinedaseither:(1)thetotalmassoftheconstituentdischargedoverthecalendarday(12:00amthrough11:59pm)orany24‐hourperiodthatreasonablyrepresentsacalendardayforpurposesofsampling(asspecifiedinthepermit),foraconstituentwithlimitationsexpressedinunitsofmass;or(2)theunweightedarithmeticmeanmeasurementoftheconstituentoverthedayforaconstituentwithlimitationsexpressedinotherunitsofmeasurement(e.g.,concentration).

Thedailydischargemaybedeterminedbytheanalyticalresultsofacompositesampletakenoverthecourseofoneday(acalendardayorother24‐hourperioddefinedasaday)orbythearithmeticmeanofanalyticalresultsfromoneormoregrabsamplestakenoverthecourseoftheday.

Forcompositesampling,if1dayisdefinedasa24‐hourperiodotherthanacalendarday,theanalyticalresultforthe24‐hourperiodwillbeconsideredastheresultforthecalendardayinwhichthe24‐hourperiodends.

Detected,butNotQuantified(DNQ):sampleresultslessthantheRL,butgreaterthanorequaltothelaboratory’sMDL.

DilutionCredit:theamountofdilutiongrantedtoadischargeinthecalculationofawaterquality‐basedeffluentlimitation,basedontheallowanceofaspecifiedmixingzone.Itiscalculatedfromthedilutionratioordeterminedthroughconductingamixingzonestudyormodelingofthedischargeandreceivingwater.

EffectiveConcentration(EC):apointestimateofthetoxicantconcentrationthatwouldcauseanadverseeffectonaquantal,“allornothing,”response(suchasdeath,immobilization,orseriousincapacitation)inagivenpercentofthetestorganisms.Iftheeffectisdeathorimmobility,thetermlethalconcentration(LC)maybeused.ECvaluesmaybecalculatedusingpointestimationtechniquessuchasprobit,logit,andSpearman‐Karber.EC25istheconcentrationoftoxicant(inpercenteffluent)thatcausesaresponsein25percentofthetestorganisms.

EffluentConcentrationAllowance(ECA):avaluederivedfromthewaterqualitycriterion/objective,dilutioncredit,andambientbackgroundconcentrationthatisused,inconjunctionwiththecoefficientofvariationfortheeffluentmonitoringdata,tocalculatealong‐termaverage(LTA)dischargeconcentration.TheECAhasthesamemeaningaswasteloadallocation(WLA)asusedinUSEPAguidance(TechnicalSupportDocumentForWaterQuality‐basedToxicsControl,March1991,secondprinting,EPA/505/2‐90‐001).

EnclosedBays:indentationsalongthecoastthatencloseanareaofoceanicwaterwithindistinctheadlandsorharborworks.Enclosedbaysincludeallbayswherethenarrowestdistancebetweentheheadlandsoroutermostharborworksislessthan75percentofthegreatestdimensionoftheenclosedportionofthebay.Enclosedbaysinclude,butarenotlimitedto,HumboldtBay,BodegaHarbor,TomalesBay,Drake’sEstero,SanFranciscoBay,MorroBay,LosAngeles‐LongBeachHarbor,UpperandLowerNewportBay,MissionBay,andSanDiegoBay.Enclosedbaysdonotincludeinlandsurfacewatersoroceanwaters.

EstimatedChemicalConcentration:theestimatedchemicalconcentrationthatresultsfromtheconfirmeddetectionofthesubstancebytheanalyticalmethodbelowtheMLvalue.

Estuaries:waters,includingcoastallagoons,locatedatthemouthsofstreamsthatserveasareasofmixingforfreshandoceanwaters.Coastallagoonsandmouthsofstreamsthataretemporarilyseparatedfromtheoceanbysandbarsshallbeconsideredestuaries.Estuarinewatersshallbeconsideredtoextendfromabayortheopenoceantoapointupstreamwherethereisnosignificantmixingoffreshwaterandseawater.Estuarinewatersincluded,butarenotlimitedto,theSacramento‐SanJoaquinDelta,asdefinedinWaterCodesection12220,SuisunBay,CarquinezStraitdownstreamtotheCarquinezBridge,andappropriateareasoftheSmith,Mad,Eel,Noyo,Russian,Klamath,SanDiego,andOtayrivers.Estuariesdonotincludeinlandsurfacewatersoroceanwaters.

InhibitionConcentration(IC):theIC25istypicallycalculatedasapercentageofeffluent.Itisthelevelatwhichtheorganismsexhibit25percentreductioninbiologicalmeasurementsuchasreproductionorgrowth.Itiscalculatedstatisticallyandusedinchronictoxicitytesting.

InlandSurfaceWaters:allsurfacewatersoftheStatethatdonotincludetheocean,enclosedbays,orestuaries.

InstantaneousMaximumEffluentLimitation:thehighestallowablevalueforanysinglegrabsampleoraliquot(i.e.,eachgrabsampleoraliquotisindependentlycomparedtotheinstantaneousmaximumlimitation).

InstantaneousMinimumEffluentLimitation:thelowestallowablevalueforanysinglegrabsampleoraliquot(i.e.,eachgrabsampleoraliquotisindependentlycomparedtotheinstantaneousminimumlimitation).

MaximumDailyEffluentLimitation(MDEL):thehighestallowabledailydischargeofapollutant,overacalendarday(or24‐hourperiod).Forpollutantswithlimitationsexpressedinunitsofmass,thedailydischargeiscalculatedasthetotalmassofthepollutantdischargedovertheday.Forpollutantswithlimitationsexpressedinotherunitsofmeasurement,thedailydischargeiscalculatedasthearithmeticmeanmeasurementofthepollutantovertheday.

Median:themiddlemeasurementinasetofdata.Themedianofasetofdataisfoundbyfirstarrangingthemeasurementsinorderofmagnitude(eitherincreasingordecreasingorder).Ifthenumberofmeasurements(n)isodd,thenthemedian=X(n+1)/2.Ifniseven,thenthemedian=(Xn/2+X(n/2)+1)/2(i.e.,themidpointbetweenthen/2andn/2+1).

MethodDetectionLimit(MDL):theminimumconcentrationofasubstancethatcanbemeasuredandreportedwith99percentconfidencethattheanalyteconcentrationisgreaterthanzero,asdefinedintitle40oftheCodeofFederalRegulations,Part136,AttachmentB,revisedasofJuly3,1999.

MinimumLevel(ML):theconcentrationatwhichtheentireanalyticalsystemmustgivearecognizablesignalandacceptablecalibrationpoint.TheMListheconcentrationinasamplethatisequivalenttotheconcentrationofthelowestcalibrationstandardanalyzedbyaspecificanalyticalprocedure,assumingthatallthemethodspecifiedsampleweights,volumes,andprocessingstepshavebeenfollowed.

MixingZone:alimitedvolumeofreceivingwaterthatisallocatedformixingwithawastewaterdischargewherewaterqualitycriteriacanbeexceededwithoutcausingadverseeffectstotheoverallwaterbody.

NotDetected(ND):thosesampleresultslessthanthelaboratory’sMDL.

OceanWaters:theterritorialmarinewatersoftheStateasdefinedbyCalifornialawtotheextentthesewatersareoutsideofenclosedbays,estuaries,andcoastallagoons.DischargestooceanwatersareregulatedinaccordancewiththeStateWaterBoard’sCaliforniaOceanPlan.

PersistentPollutants:substancesforwhichdegradationordecompositionintheenvironmentisnonexistentorveryslow.

PollutantMinimizationProgram(PMP):wasteminimizationandpollutionpreventionactionsthatinclude,butarenotlimitedto,productsubstitution,wastestreamrecycling,alternativewastemanagementmethods,andeducationofthepublicandbusinesses.ThegoalofthePMPshallbetoreduceallpotentialsourcesofaprioritypollutant(s)throughpollutantminimization(control)strategies,includingpollutionpreventionmeasuresasappropriate,tomaintaintheeffluentconcentrationatorbelowthewaterquality‐basedeffluentlimitation.Pollutionpreventionmeasuresmaybeparticularlyappropriateforpersistentbioaccumulativeprioritypollutantswherethereisevidencethatbeneficialusesarebeingimpacted.TheRegionalWaterBoardmayconsidercosteffectivenesswhenestablishingtherequirementsofaPMP.ThecompletionandimplementationofaPollutionPreventionPlan,ifrequiredpursuanttoWaterCodesection13263.3(d),shallbeconsideredtofulfillthePMPrequirements.

PollutionPrevention:anyactionthatcausesanetreductionintheuseorgenerationofahazardoussubstanceorotherpollutantthatisdischargedintowaterandincludes,butisnotlimitedto,inputchange,operationalimprovement,productionprocesschange,andproductreformulation(asdefinedinWaterCodesection13263.3).Pollutionpreventiondoesnotincludeactionsthatmerelyshiftapollutantinwastewaterfromoneenvironmentalmediumtoanotherenvironmentalmedium,unlessclearenvironmentalbenefitsofsuchanapproachareidentifiedtothesatisfactionoftheStateorRegionalWaterBoard.

PubliclyOwnedTreatmentWorks(POTW):atreatmentworksasdefinedinsection212oftheCleanWaterAct(CWA),whichisownedbyaStateormunicipalityasdefinedbysection502(4)oftheCWA.[Section502(4)oftheCWAdefinesamunicipalityasacity,town,borough,county,parish,district,association,orotherpublicbodycreatedbyorpursuanttoStatelawandhavingjurisdictionoverdisposalofsewage,industrialwastes,orotherwastes).Thisdefinitionincludesanydevicesandsystemsusedinthestorage,treatment,recycling,andreclamationofmunicipalsewageorindustrialwastesofaliquidnature.Italsoincludessewers,pipesandotherconveyancesonlyiftheyconveywastewatertoaPOTWTreatmentPlant.Thetermalsomeansthemunicipalityasdefinedinsection502(4)oftheCleanWaterAct,whichhasjurisdictionovertheIndirectDischargestoandthedischargesfromsuchatreatmentworks.

ReportingLevel(RL):theML(anditsassociatedanalyticalmethod)usedforreportingandcompliancedetermination.TheMLsincludedinthisOrdercorrespondtoapprovedanalyticalmethodsforreportingasampleresultthatareselectedbytheRegionalWaterBoardeitherfromAppendix4oftheSIPinaccordancewithsection2.4.2oftheSIPorestablishedinaccordancewithsection2.4.3oftheSIP.TheMLisbasedontheproperapplicationofmethod‐basedanalyticalproceduresforsamplepreparationandtheabsenceofanymatrixinterferences.OtherfactorsmaybeappliedtotheMLdependingonthespecificsamplepreparationstepsemployed.Forexample,thetreatmenttypicallyappliedincaseswheretherearematrix‐effectsistodilutethe

sampleorsamplealiquotbyafactoroften.Insuchcases,thisadditionalfactormustbeappliedtotheMLinthecomputationoftheRL.

SatelliteCollectionSystem:theportion,ifany,ofasanitarysewersystemownedoroperatedbyadifferentpublicagencythantheagencythatownsandoperatesthewastewatertreatmentfacilitythatasanitarysewersystemistributaryto.

SourceofDrinkingWater:anywaterdesignatedasmunicipalordomesticsupply(MUN)inaRegionalWaterBoardBasinPlan.

StandardDeviation():ameasureofvariabilitythatiscalculatedasfollows:

= ([(x‐)2]/(n–1))0.5

where:

x istheobservedvalue;

isthearithmeticmeanoftheobservedvalues;and

n isthenumberofsamples.

ToxicityReductionEvaluation(TRE):astudyconductedinastep‐wiseprocessdesignedtoidentifythecausativeagentsofeffluentorambienttoxicity,isolatethesourcesoftoxicity,evaluatetheeffectivenessoftoxicitycontroloptions,andthenconfirmthereductionintoxicity.ThefirststepsoftheTREconsistofthecollectionofdatarelevanttothetoxicity,includingadditionaltoxicitytesting,andanevaluationoffacilityoperationsandmaintenancepractices,andbestmanagementpractices.AToxicityIdentificationEvaluation(TIE)mayberequiredaspartoftheTRE,ifappropriate.(ATIEisasetofprocedurestoidentifythespecificchemical(s)responsiblefortoxicity.Theseproceduresareperformedinthreephases(characterization,identification,andconfirmation)usingaquaticorganismtoxicitytests.)

AttachmentB–MapofOccidentalWastewaterTreatmentPlant B‐1

ATTACHMENTB–MAPOFOCCIDENTALCSDWASTEWATERTREATMENTPLANT

AttachmentC–WastewaterFlowSchematic C‐1

ATTACHMENTC–FACILITYFLOWSCHEMATIC

AttachmentD–StandardProvisions D‐1

D.ATTACHMENTD–STANDARDPROVISIONS

I. STANDARDPROVISIONS–PERMITCOMPLIANCE

A. DutytoComply

1. ThePermitteemustcomplywithalloftheconditionsofthisOrder.AnynoncomplianceconstitutesaviolationoftheCleanWaterAct(CWA)andtheCaliforniaWaterCodeandisgroundsforenforcementaction,forpermittermination,revocationandreissuance,ormodification;ordenialofapermitrenewalapplication.(40CFR§122.41(a).)

2. ThePermitteeshallcomplywitheffluentstandardsorprohibitionsestablishedunderSection307(a)oftheCWAfortoxicpollutantsandwithstandardsforsewagesludgeuseordisposalestablishedundersection405(d)oftheCWAwithinthetimeprovidedintheregulationsthatestablishthesestandardsorprohibitions,evenifthisOrderhasnotyetbeenmodifiedtoincorporatetherequirement.(40CFR§122.41(a)(1).)

B. NeedtoHaltorReduceActivityNotaDefense

ItshallnotbeadefenseforaPermitteeinanenforcementactionthatitwouldhavebeennecessarytohaltorreducethepermittedactivityinordertomaintaincompliancewiththeconditionsofthisOrder.(40CFR§122.41(c).)

C. DutytoMitigate

ThePermitteeshalltakeallreasonablestepstominimizeorpreventanydischargeorsludgeuseordisposalinviolationofthisOrderthathasareasonablelikelihoodofadverselyaffectinghumanhealthortheenvironment.(40CFR.§122.41(d).)

D. ProperOperationandMaintenance

ThePermitteeshallatalltimesproperlyoperateandmaintainallfacilitiesandsystemsoftreatmentandcontrol(andrelatedappurtenances)whichareinstalledorusedbythePermitteetoachievecompliancewiththeconditionsofthisOrder.Properoperationandmaintenancealsoincludesadequatelaboratorycontrolsandappropriatequalityassuranceprocedures.ThisprovisionrequirestheoperationofbackuporauxiliaryfacilitiesorsimilarsystemsthatareinstalledbyaPermitteeonlywhennecessarytoachievecompliancewiththeconditionsofthisOrder.(40CFR§122.41(e).)

E. PropertyRights

1. ThisOrderdoesnotconveyanypropertyrightsofanysortoranyexclusiveprivileges.(40CFR§122.41(g).)

2. TheissuanceofthisOrderdoesnotauthorizeanyinjurytopersonsorpropertyorinvasionofotherprivaterights,oranyinfringementofstateorlocallaworregulations.(40CFR§122.5(c).)

F. InspectionandEntry

ThePermitteeshallallowtheRegionalWaterBoard,StateWaterBoard,UnitedStatesEnvironmentalProtectionAgency(USEPA),and/ortheirauthorizedrepresentatives(includinganauthorizedcontractoractingastheirrepresentative),uponthepresentationofcredentialsandotherdocuments,asmayberequiredbylaw,to(40CFR§122.41(i);WaterCode,§13383):

1. EnteruponthePermittee'spremiseswherearegulatedfacilityoractivityislocatedorconducted,orwhererecordsarekeptundertheconditionsofthisOrder(40CFR§122.41(i)(1));

2. Haveaccesstoandcopy,atreasonabletimes,anyrecordsthatmustbekeptundertheconditionsofthisOrder(40CFR§122.41(i)(2));

3. Inspectandphotograph,atreasonabletimes,anyfacilities,equipment(includingmonitoringandcontrolequipment),practices,oroperationsregulatedorrequiredunderthisOrder(40CFR§122.41(i)(3));and

4. Sampleormonitor,atreasonabletimes,forthepurposesofassuringOrdercomplianceorasotherwiseauthorizedbytheCWAortheWaterCode,anysubstancesorparametersatanylocation.(40CFR§122.41(i)(4).)

G. Bypass

1. Definitions

a. “Bypass”meanstheintentionaldiversionofwastestreamsfromanyportionofatreatmentfacility.(40CFR§122.41(m)(1)(i).)

b. “Severepropertydamage”meanssubstantialphysicaldamagetoproperty,damagetothetreatmentfacilities,whichcausesthemtobecomeinoperable,orsubstantialandpermanentlossofnaturalresourcesthatcanreasonablybeexpectedtooccurintheabsenceofabypass.Severepropertydamagedoesnotmeaneconomiclosscausedbydelaysinproduction.(40CFR§122.41(m)(1)(ii).)

2. Bypassnotexceedinglimitations.ThePermitteemayallowanybypasstooccurwhichdoesnotcauseexceedancesofeffluentlimitations,butonlyifitisforessentialmaintenancetoassureefficientoperation.ThesebypassesarenotsubjecttotheprovisionslistedinStandardProvisions–PermitComplianceI.G.3,I.G.4,andI.G.5below.(40CFR§122.41(m)(2).)

3. Prohibitionofbypass.Bypassisprohibited,andtheRegionalWaterBoardmaytakeenforcementactionagainstaPermitteeforbypass,unless(40CFR§122.41(m)(4)(i)):

a. Bypasswasunavoidabletopreventlossoflife,personalinjury,orseverepropertydamage(40CFR§122.41(m)(4)(i)(A));

b. Therewerenofeasiblealternativestothebypass,suchastheuseofauxiliarytreatmentfacilities,retentionofuntreatedwastes,ormaintenanceduringnormalperiodsofequipmentdowntime.Thisconditionisnotsatisfiedifadequateback‐upequipmentshouldhavebeeninstalledintheexerciseofreasonableengineeringjudgmenttopreventabypassthatoccurredduringnormalperiodsofequipmentdowntimeorpreventivemaintenance(40CFR§122.41(m)(4)(i)(B));and

c. ThePermitteesubmittednoticetotheRegionalWaterBoardasrequiredunderStandardProvisions–PermitComplianceI.G.6below.(40CFR§122.41(m)(4)(i)(C).)

4. BurdenofProof.Inanyenforcementproceeding,thePermitteeseekingtoestablishthebypassdefensehastheburdenofproof.

5. TheRegionalWaterBoardmayapproveananticipatedbypass,afterconsideringitsadverseeffects,iftheRegionalWaterBoarddeterminesthatitwillmeetthethreeconditionslistedinStandardProvisions–PermitComplianceI.G.3above.(40CFR§122.41(m)(4)(ii).)

6. Notice

a. Anticipatedbypass.IfthePermitteeknowsinadvanceoftheneedforabypass,itshallsubmitanotice,ifpossibleatleast10daysbeforethedateofthebypass.(40CFR§122.41(m)(3)(i).)

b. Unanticipatedbypass.ThePermitteeshallsubmitnoticeofanunanticipatedbypassasrequiredinStandardProvisions‐ReportingV.Ebelow(24‐hournotice).(40CFR§122.41(m)(3)(ii).)

H. Upset

UpsetmeansanexceptionalincidentinwhichthereisunintentionalandtemporarynoncompliancewithtechnologybasedpermiteffluentlimitationsbecauseoffactorsbeyondthereasonablecontrolofthePermittee.Anupsetdoesnotincludenoncompliancetotheextentcausedbyoperationalerror,improperlydesignedtreatmentfacilities,inadequatetreatmentfacilities,lackofpreventivemaintenance,orcarelessorimproperoperation.(40CFR§122.41(n)(1).)

1. Effectofanupset.AnupsetconstitutesanaffirmativedefensetoanactionbroughtfornoncompliancewithsuchtechnologybasedpermiteffluentlimitationsiftherequirementsofStandardProvisions–PermitComplianceI.H.2belowaremet.Nodeterminationmadeduringadministrativereviewofclaimsthatnoncompliancewascausedbyupset,andbeforeanactionfornoncompliance,isfinaladministrativeactionsubjecttojudicialreview.(40CFR§122.41(n)(2).)

2. Conditionsnecessaryforademonstrationofupset.APermitteewhowishestoestablishtheaffirmativedefenseofupsetshalldemonstrate,throughproperlysigned,contemporaneousoperatinglogsorotherrelevantevidencethat(40CFR§122.41(n)(3)):

a. AnupsetoccurredandthatthePermitteecanidentifythecause(s)oftheupset(40CFR§122.41(n)(3)(i));

b. Thepermittedfacilitywas,atthetime,beingproperlyoperated(40CFR§122.41(n)(3)(ii));

c. ThePermitteesubmittednoticeoftheupsetasrequiredinStandardProvisions–ReportingV.E.2.bbelow(24‐hournotice)(40CFR§122.41(n)(3)(iii));and

d. ThePermitteecompliedwithanyremedialmeasuresrequiredunderStandardProvisions–PermitComplianceI.Cabove.(40CFR§122.41(n)(3)(iv).)

3. Burdenofproof.Inanyenforcementproceeding,thePermitteeseekingtoestablishtheoccurrenceofanupsethastheburdenofproof.(40CFR§122.41(n)(4).)

II. STANDARDPROVISIONS–PERMITACTION

A. General

ThisOrdermaybemodified,revokedandreissued,orterminatedforcause.ThefilingofarequestbythePermitteeformodification,revocationandreissuance,ortermination,oranotificationofplannedchangesoranticipatednoncompliancedoesnotstayanyOrdercondition.(40CFR§122.41(f).)

B. DutytoReapply

IfthePermitteewishestocontinueanactivityregulatedbythisOrderaftertheexpirationdateofthisOrder,thePermitteemustapplyforandobtainanewpermit.(40CFR§122.41(b).)

C. Transfers

ThisOrderisnottransferabletoanypersonexceptafternoticetotheRegionalWaterBoard.TheRegionalWaterBoardmayrequiremodificationorrevocationandreissuanceoftheOrdertochangethenameofthePermitteeandincorporatesuchotherrequirementsasmaybenecessaryundertheCWAandtheWaterCode.(40CFR§122.41(l)(3);§122.61.)

III. STANDARDPROVISIONS–MONITORING

A. Samplesandmeasurementstakenforthepurposeofmonitoringshallberepresentativeofthemonitoredactivity.(40CFR§122.41(j)(1).)

B. MonitoringresultsmustbeconductedaccordingtotestproceduresunderPart136or,inthecaseofsludgeuseordisposal,approvedunderPart136unlessotherwisespecifiedinPart503unlessothertestprocedureshavebeenspecifiedinthisOrder.(40CFR§122.41(j)(4);§122.44(i)(1)(iv).)

IV. STANDARDPROVISIONS–RECORDS

A. ExceptforrecordsofmonitoringinformationrequiredbythisOrderrelatedtothePermittee'ssewagesludgeuseanddisposalactivities,whichshallberetainedforaperiodofatleastfiveyears(orlongerasrequiredbyPart503),thePermitteeshallretainrecordsofallmonitoringinformation,includingallcalibrationandmaintenancerecordsandalloriginalstripchartrecordingsforcontinuousmonitoringinstrumentation,copiesofallreportsrequiredbythisOrder,andrecordsofalldatausedtocompletetheapplicationforthisOrder,foraperiodofatleastthree(3)yearsfromthedateofthesample,measurement,reportorapplication.ThisperiodmaybeextendedbyrequestoftheRegionalWaterBoardExecutiveOfficeratanytime.(40CFR§122.41(j)(2).)

B. Recordsofmonitoringinformationshallinclude:

1. Thedate,exactplace,andtimeofsamplingormeasurements(40CFR§122.41(j)(3)(i));

2. Theindividual(s)whoperformedthesamplingormeasurements(40CFR§122.41(j)(3)(ii));

3. Thedate(s)analyseswereperformed(40CFR§122.41(j)(3)(iii));

4. Theindividual(s)whoperformedtheanalyses(40CFR§122.41(j)(3)(iv));

5. Theanalyticaltechniquesormethodsused(40CFR§122.41(j)(3)(v));and

6. Theresultsofsuchanalyses.(40CFR§122.41(j)(3)(vi).)

C. Claimsofconfidentialityforthefollowinginformationwillbedenied(40CFR§122.7(b)):

1. ThenameandaddressofanypermitapplicantorPermittee(40CFR§122.7(b)(1));and

2. Permitapplicationsandattachments,permitsandeffluentdata.(40CFR§122.7(b)(2).)

V. STANDARDPROVISIONS–REPORTING

A. DutytoProvideInformation

ThePermitteeshallfurnishtotheRegionalWaterBoard,StateWaterBoard,orUSEPAwithinareasonabletime,anyinformationwhichtheRegionalWaterBoard,StateWaterBoard,orUSEPAmayrequesttodeterminewhethercauseexistsformodifying,revokingandreissuing,orterminatingthisOrderortodeterminecompliancewiththisOrder.Uponrequest,thePermitteeshallalsofurnishtotheRegionalWaterBoard,StateWaterBoard,orUSEPAcopiesofrecordsrequiredtobekeptbythisOrder.(40CFR§122.41(h);WaterCode,§13267.)

B. SignatoryandCertificationRequirements

1. Allapplications,reports,orinformationsubmittedtotheRegionalWaterBoard,StateWaterBoard,and/orUSEPAshallbesignedandcertifiedinaccordancewithStandardProvisions–ReportingV.B.2,V.B.3,V.B.4,andV.B.5below.(40CFR§122.41(k).)

2. Allpermitapplicationsshallbesignedbyeitheraprincipalexecutiveofficerorrankingelectedofficial.Forpurposesofthisprovision,aprincipalexecutiveofficerofafederalagencyincludes:(i)thechiefexecutiveofficeroftheagency,or(ii)aseniorexecutiveofficerhavingresponsibilityfortheoveralloperationsofaprincipalgeographicunitoftheagency(e.g.,RegionalAdministratorsofUSEPA).(40CFR§122.22(a)(3).).

3. AllreportsrequiredbythisOrderandotherinformationrequestedbytheRegionalWaterBoard,StateWaterBoard,orUSEPAshallbesignedbyapersondescribedinStandardProvisions–ReportingV.B.2above,orbyadulyauthorizedrepresentativeofthatperson.Apersonisadulyauthorizedrepresentativeonlyif:

a. TheauthorizationismadeinwritingbyapersondescribedinStandardProvisions–ReportingV.B.2above(40CFR§122.22(b)(1));

b. Theauthorizationspecifieseitheranindividualorapositionhavingresponsibilityfortheoveralloperationoftheregulatedfacilityoractivitysuchasthepositionofplantmanager,operatorofawellorawellfield,superintendent,positionofequivalentresponsibility,oranindividualorpositionhavingoverallresponsibilityforenvironmentalmattersforthecompany.(Adulyauthorizedrepresentativemaythusbeeitheranamedindividualoranyindividualoccupyinganamedposition.)(40CFR§122.22(b)(2));and

c. ThewrittenauthorizationissubmittedtotheRegionalWaterBoardandStateWaterBoard.(40CFR§122.22(b)(3).)

4. IfanauthorizationunderStandardProvisions–ReportingV.B.3aboveisnolongeraccuratebecauseadifferentindividualorpositionhasresponsibilityfortheoveralloperationofthefacility,anewauthorizationsatisfyingtherequirementsofStandardProvisions–ReportingV.B.3abovemustbesubmittedtotheRegionalWaterBoardandStateWaterBoardpriortoortogetherwithanyreports,information,orapplications,tobesignedbyanauthorizedrepresentative.(40CFR§122.22(c).)

5. AnypersonsigningadocumentunderStandardProvisions–ReportingV.B.2orV.B.3aboveshallmakethefollowingcertification:“Icertifyunderpenaltyoflawthatthisdocumentandallattachmentswerepreparedundermydirectionorsupervisioninaccordancewithasystemdesignedtoassurethatqualifiedpersonnelproperlygatherandevaluatetheinformationsubmitted.Basedonmyinquiryofthepersonorpersonswhomanagethesystemorthosepersonsdirectlyresponsibleforgatheringtheinformation,theinformationsubmittedis,tothebestofmyknowledgeandbelief,true,accurate,andcomplete.Iamawarethattherearesignificantpenaltiesforsubmittingfalseinformation,includingthepossibilityoffineandimprisonmentforknowingviolations.”(40CFR§122.22(d).)

C. MonitoringReports

1. MonitoringresultsshallbereportedattheintervalsspecifiedintheMonitoringandReportingProgram(AttachmentE)inthisOrder.(40CFR§122.22(l)(4).)

2. MonitoringresultsmustbereportedonaDischargeMonitoringReport(DMR)formorformsprovidedorspecifiedbytheRegionalWaterBoardorStateWaterBoardforreportingresultsofmonitoringofsludgeuseordisposalpractices.(40CFR§122.41(l)(4)(i).)

3. IfthePermitteemonitorsanypollutantmorefrequentlythanrequiredbythisOrderusingtestproceduresapprovedunderPart136or,inthecaseofsludgeuseordisposal,approvedunderPart136unlessotherwisespecifiedinPart503,orasspecifiedinthisOrder,theresultsofthismonitoringshallbeincludedinthecalculationandreportingofthedatasubmittedintheDMRorsludgereportingformspecifiedbytheRegionalWaterBoard.(40CFR§122.41(l)(4)(ii).)

4. Calculationsforalllimitations,whichrequireaveragingofmeasurements,shallutilizeanarithmeticmeanunlessotherwisespecifiedinthisOrder.(40CFR§122.41(l)(4)(iii).)

D. ComplianceSchedules

Reportsofcomplianceornoncompliancewith,oranyprogressreportson,interimandfinalrequirementscontainedinanycompliancescheduleofthisOrder,shallbesubmittednolaterthan14daysfollowingeachscheduledate.(40CFR§122.41(l)(5).)

E. Twenty‐FourHourReporting

1. ThePermitteeshallreportanynoncompliancethatmayendangerhealthortheenvironment.Anyinformationshallbeprovidedorallywithin24hoursfromthetimethePermitteebecomesawareofthecircumstances.Awrittensubmissionshallalsobeprovidedwithinfive(5)daysofthetimethePermitteebecomesawareofthecircumstances.Thewrittensubmissionshallcontainadescriptionofthenoncomplianceanditscause;theperiodofnoncompliance,includingexactdatesandtimes,andifthenoncompliancehasnotbeencorrected,theanticipatedtimeitisexpectedtocontinue;andstepstakenorplannedtoreduce,eliminate,andpreventreoccurrenceofthenoncompliance.(40CFR§122.41(l)(6)(i).)

2. Thefollowingshallbeincludedasinformationthatmustbereportedwithin24hoursunderthisparagraph(40CFR§122.41(l)(6)(ii)):

a. AnyunanticipatedbypassthatexceedsanyeffluentlimitationinthisOrder.(40CFR§122.41(l)(6)(ii)(A).)

b. AnyupsetthatexceedsanyeffluentlimitationinthisOrder.(40CFR§122.41(l)(6)(ii)(B).)

c. ViolationofamaximumdailydischargelimitationforanyofthepollutantslistedinthisOrdertobereportedwithin24hours[40CFR§122.41(l)(6)(ii)(C)]

3. TheRegionalWaterBoardmaywaivetheabove‐requiredwrittenreportunderthisprovisiononacase‐by‐casebasisifanoralreporthasbeenreceivedwithin24hours.(40CFR§122.41(l)(6)(iii).)

F. PlannedChanges

ThePermitteeshallgivenoticetotheRegionalWaterBoardassoonaspossibleofanyplannedphysicalalterationsoradditionstothepermittedfacility.Noticeisrequiredunderthisprovisiononlywhen(40CFR§122.41(l)(1)):

1. Thealterationoradditiontoapermittedfacilitymaymeetoneofthecriteriafordeterminingwhetherafacilityisanewsourceasdefinedinsection122.29(b)(40CFR§122.41(l)(1)(i));or

2. Thealterationoradditioncouldsignificantlychangethenatureorincreasethequantityofpollutantsdischarged.ThisnotificationappliestopollutantsthatarenotsubjecttoeffluentlimitationsinthisOrder.(40CFR§122.41(l)(1)(ii).)

3. ThealterationoradditionresultsinasignificantchangeinthePermittee’ssludgeuseordisposalpractices,andsuchalteration,addition,orchangemayjustifytheapplicationofpermitconditionsthataredifferentfromorabsentintheexistingpermit,includingnotificationofadditionaluseordisposalsitesnotreportedduringthepermitapplicationprocessornotreportedpursuanttoanapprovedlandapplicationplan.(40CFR§122.41(l)(1)(iii).)

G. AnticipatedNoncompliance

ThePermitteeshallgiveadvancenoticetotheRegionalWaterBoardorStateWaterBoardofanyplannedchangesinthepermittedfacilityoractivitythatmayresultinnoncompliancewithGeneralOrderrequirements.(40CFR§122.41(l)(2).)

H. OtherNoncompliance

ThePermitteeshallreportallinstancesofnoncompliancenotreportedunderStandardProvisions–ReportingV.C,V.D,andV.Eaboveatthetimemonitoringreportsaresubmitted.ThereportsshallcontaintheinformationlistedinStandardProvision–ReportingV.Eabove.(40CFR§122.41(l)(7).)

I. OtherInformation

WhenthePermitteebecomesawarethatitfailedtosubmitanyrelevantfactsinapermitapplication,orsubmittedincorrectinformationinapermitapplicationorinanyreporttotheRegionalWaterBoard,StateWaterBoard,orUSEPA,thePermitteeshallpromptlysubmitsuchfactsorinformation.(40CFR§122.41(l)(8).)

VI. STANDARDPROVISIONS–ENFORCEMENT

A. TheRegionalWaterBoardisauthorizedtoenforcethetermsofthispermitunderseveralprovisionsoftheWaterCode,including,butnotlimitedto,sections13385,13386,and13387

VII. ADDITIONALPROVISIONS–NOTIFICATIONLEVELS

A. Publicly‐OwnedTreatmentWorks(POTWs)

AllPOTWsshallprovideadequatenoticetotheRegionalWaterBoardofthefollowing(40CFR§122.42(b)):

1. AnynewintroductionofpollutantsintothePOTWfromanindirectdischargerthatwouldbesubjecttosections301or306oftheCWAifitweredirectlydischargingthosepollutants(40CFR§122.42(b)(1));and

2. AnysubstantialchangeinthevolumeorcharacterofpollutantsbeingintroducedintothatPOTWbyasourceintroducingpollutantsintothePOTWatthetimeofadoptionoftheOrder.(40CFR§122.42(b)(2).)

3. AdequatenoticeshallincludeinformationonthequalityandquantityofeffluentintroducedintothePOTWaswellasanyanticipatedimpactofthechangeonthequantityorqualityofeffluenttobedischargedfromthePOTW.(40CFR§122.42(b)(3).)

AttachmentE–MRP E‐1

E. ATTACHMENTE–MONITORINGANDREPORTINGPROGRAMNO.R1‐2012‐0068

TableofContents

I. GeneralMonitoringProvisions ....................................................................................... ..E‐2 II. MonitoringLocations ..................................................................................................... ..E‐3 III. InfluentMonitoringRequirements ................................................................................. ..E‐4

A. MonitoringLocationINF‐001.................................................................................... ..E-4 IV. EffluentMonitoringRequirements ................................................................................. ..E‐5

A. MonitoringLocationEFF‐001 ................................................................................... ..E-5 B. MonitoringLocationEFF‐002 ................................................................................... ..E-7

V. WholeEffluentToxicityTestingRequirements........................................................................................E‐8VI. LandDischargeMonitoringRequirements..............................................................................................E‐14VII. Irrigation/ReclamationMonitoringRequirements..............................................................................E‐15

A. Irrigation/ReclamationMonitoringRequirements .................................................... E-15 B. RecycledWaterProductionandUse. ......................................................................... E-16

VIII. ReceivingWaterMonitoringRequirements–SurfaceWaterAndGroundwater....................E‐17A. SurfaceWaterMonitoringLocationsRSW‐001andRSW‐002 .................................... E-17 B. Groundwater ............................................................................................................ E-17

IX. OtherMonitoringRequirements...................................................................................................................E‐18X. ReportingRequirements..................................................................................................................................E‐18

ListofTablesTableE‐1. ... TestMethodsandMLsforPriorityPollutants ........................................................... ….E-3 TableE‐2. ... MonitoringStationLocations ...................................................................................... …..E-3 TableE‐3. ... InfluentMonitoring–MonitoringLocationINF‐001 ................................................ …..E-4 TableE‐4. ... EffluentMonitoringofDischargetoGraham’sPond–MonitoringLocationEFF‐001...E-5 TableE‐5. ... EffluentMonitoringforDischargesfromGraham’sPondtoDutchBillCreek–

MonitoringLocationEFF‐002 ..................................................................................... ….E-7 TableE‐6. ... Irrigation/ReclamationMonitoringRequirements–MonitoringLocationEFF‐003..E-15 TableE‐7. ... RecycledWaterProductionandUse .......................................................................... ….E-16 TableE‐8. ... ReceivingWaterMonitoringRequirements .............................................................. ….E-17 TableE‐9. ... MonitoringPeriodsandReportingSchedule ............................................................. ….E-19

AttachmentE–MonitoringandReportingProgram(MRP)TheCodeofFederalRegulations(CFR)at40CFR122.48requiresthatallNationalPollutantDischargeEliminationSystem(NPDES)permitsspecifymonitoringandreportingrequirements.CaliforniaWaterCode(WaterCode)sections13267and13383alsoauthorizetheRegionalWaterQualityControlBoard(RegionalWaterBoard)torequiretechnicalandmonitoringreports.ThisMonitoringandReportingProgram(MRP)establishesmonitoringandreportingrequirements,whichimplementthefederalandCaliforniaregulations.

I. GENERALMONITORINGPROVISIONS

A. WastewaterMonitoringProvision.CompositesamplesmaybetakenbyaproportionalsamplingdeviceapprovedbytheExecutiveOfficerorbygrabsamplescompositedinproportiontoflow.Incompositinggrabsamples,thesamplingintervalshallnotexceedonehour.

B. IfthePermitteemonitorsanypollutantmorefrequentlythanrequiredbythisOrder,usingtestproceduresapprovedby40CFRPart136orasspecifiedinthisOrder,theresultsofsuchmonitoringshallbeincludedinthecalculationandreportingofthedatasubmittedinthemonthlyandannualdischargemonitoringreports.

C. LaboratoriesanalyzingmonitoringsamplesshallbecertifiedbytheCaliforniaDepartmentofPublicHealth(CDPH)inaccordancewiththeprovisionsofWaterCodesection13176,andmustincludequalityassurance/qualitycontroldatawiththeiranalyticalreports.

D. Complianceandreasonablepotentialmonitoringanalysesshallbeconductedusingcommerciallyavailableandreasonablyachievabledetectionlimitsthatarelowerthantheapplicableeffluentlimitation.IfnoMinimumLevel(ML)valueisbelowtheeffluentlimitations,thelowestMLshallbeselectedastheReportingLevel(RL).TableE‐1liststhetestmethodsthePermitteemayuseforcomplianceandreasonablepotentialmonitoringtoanalyzeprioritypollutantswitheffluentlimitations.

TableE‐1. TestMethodsandMLsforPriorityPollutants

ConstituentTypesofAnalyticalMethods

MinimumLevels(µg/L)

TypesofAnalyticalMethods(SeeDefinitionofAcronymsBelowthisTable)MinimumLevels(µg/L)

GC GCMS COLOR ICPMS SPGFAA CVAA GFAA

6 Copper ‐‐‐ ‐‐‐ ‐‐‐ 0.5 2 ‐‐‐ ‐‐‐7 Lead ‐‐‐ ‐‐‐ ‐‐‐ 0.5 2 ‐‐‐ ‐‐‐8 Mercury ‐‐‐ ‐‐‐ ‐‐‐ 0.5 0.2 ‐‐‐11 Silver ‐‐‐ ‐‐‐ ‐‐‐ 0.25 2 ‐‐‐ ‐‐‐14 Cyanide ‐‐‐ ‐‐‐ 5 ‐‐‐ ‐‐‐ ‐‐‐ ‐‐‐20 Bromoform 0.5 2 ‐‐‐ ‐‐‐ ‐‐‐ ‐‐‐ ‐‐‐

23 Chlorodibromomethane

0.5 2 ‐‐‐ ‐‐‐ ‐‐‐ ‐‐‐ ‐‐‐

26 Chloroform 0.5 2 ‐‐‐ ‐‐‐ ‐‐‐ ‐‐‐ ‐‐‐

27 Dichlorobromomethane

0.5 2 ‐‐‐ ‐‐‐ ‐‐‐ ‐‐‐ ‐‐‐

68 Bis(2‐ethylhexyl)phthalate

‐‐‐ 5 ‐‐‐ ‐‐‐ ‐‐‐ ‐‐‐ ‐‐‐

TableNotes:GC–GasChromatographyGCMS‐GasChromatography/MassSpectroscopyCOLOR–Colorimetric

ICPMS– InductivelyCoupledPlasma/MassSpectroscopySPGFAA–StabilizedPlatformGraphiteFurnaceAtomicAbsorptionCVAA–ColdVaporAtomicAbsorptionGFAA–GraphiteFurnaceAtomicAbsorption

II. MONITORINGLOCATIONS

ThePermitteeshallestablishthefollowingmonitoringlocationstodemonstratecompliancewiththeeffluentlimitations,dischargespecifications,andotherrequirementsinthisOrder:

TableE‐2. MonitoringStationLocationsDischargePointName

MonitoringLocationName MonitoringLocationDescription

‐‐ INF‐001 Untreatedinfluentwastewatercollectedatarepresentativepointprecedingprimarytreatment.

001 EFF‐001 ArepresentativepointimmediatelyfollowingalltreatmentanddisinfectionprocessesandbeforetransfertoGraham’sPond.

002 EFF‐0021 TreatedwastewaterdischargedfromGraham’sPondtoDutchBillCreek.Samplesaretobecollectedfromtheendofthedischargepipe.

003 EFF‐0031 TreatedwastewaterdischargedfromGraham’sPondtotheLoades’propertyirrigationsystem.

‐‐ RSW‐001 UpstreamreceivingwatermonitoringlocationthatisonthemaincreekchannelthatdrainsintoGraham’sPond.

‐‐ RSW‐002

DownstreamreceivingwatermonitoringlocationinDutchBillCreekdownstreamofthepointofdischarge.SamplesshallberepresentativeofconditionsinDutchBillCreekfollowingintroductionandmixingofeffluentfromGraham’sPond.ThePermitteeshallprovideadescriptionoftheproposeddownstreamreceivingwatermonitoringlocationforapprovaloftheExecutiveOfficer.

TableNotes:

1.EFF‐002andEFF‐003arethesamelocation,thesamplingpointfollowingeffluentstorageinGraham’sPond.DifferentDischargePointNameshavebeenassignedduetodifferencesinmonitoringrequirementsatDischargePoint002(dischargetoDutchBillCreek)andDischargePoint003(dischargetoLoades’propertyirrigationsystem..

III. INFLUENTMONITORINGREQUIREMENTS

A. MonitoringLocationINF‐001

ThePermitteeshallmonitorinfluenttotheFacilityatMonitoringLocationINF‐001asfollows:

TableE‐3. InfluentMonitoring–MonitoringLocationINF‐001

Parameter Units SampleTypeMinimumSampling

FrequencyRequiredAnalytical

TestMethodBiochemicalOxygenDemand(5‐day@20°C)

mg/L 24‐hrcomposite Monthly StandardMethods1

TotalSuspendedSolids mg/L 24‐hrcomposite Monthly StandardMethods

SettleableSolids ml/L Grab Monthly StandardMethodsMeanDailyFlow2 mgd Meter Continuous ‐‐

TableNotes:

1.InaccordancewiththecurrenteditionofStandardMethodsforExaminationofWaterandWastewater(AmericanPublicHealthAdministration)orcurrenttestproceduresspecifiedin40CFR136.

2.Duringtheirrigationseason,whenthereisnodischargefromGraham’sPondtoDutchBillCreek,meandailyinfluentflowmaybecalculatedbasedonatotalizerreadingthatisnotreaddaily.

IV. EFFLUENTMONITORINGREQUIREMENTS

A. MonitoringLocationEFF‐001

ThePermitteeshallmonitortreated,disinfected,dechlorinatedwastewatertobedischargedtoGraham’sPondatDischargePoint001,asmeasuredatMonitoringLocationEFF‐001asfollows:

TableE‐4. EffluentMonitoringofDischargetoGraham’sPond–MonitoringLocationEFF‐001

Parameter Units SampleTypeMinimumSamplingFrequency

RequiredAnalyticalTest

MethodMeanDailyFlow1 mgd Meter Continuous ‐‐

BiochemicalOxygenDemand(5‐day@20°C)

mg/L GrabWeekly

StandardMethods2

lbs/day Calculate ‐‐Monthly%Removal Calculate ‐‐‐

TotalSuspendedSolidsmg/L Grab

Weekly

StandardMethods

lbs/day Calculate ‐‐Monthly%Removal Calculate ‐‐‐

SettleableSolids mL/L Grab Weekly StandardMethods

TotalColiformBacteria MPN/100mL Grab Daily3 StandardMethods

Chlorine,TotalResidual4

mg/L Meter Continuous StandardMethods

pH Standardunits Grab DailyStandardMethods

Hardness5 mg/L Grab Monthly StandardMethods

Copper,TotalRecoverable5

µg/LGrab Monthly EPAMethod

200Lead,TotalRecoverable5

µg/L Grab Monthly EPAMethod200

Mercuryµg/L Grab Monthly EPAMethod

1631ESilver,TotalRecoverable5

Cyanide,Total(asCN)µg/L Grab Monthly EPAMethod

335Dichlorobromomethane µg/L Grab Monthly EPAMethod

Method624

Chlorodibromomethaneµg/L Grab Monthly EPAMethod

Bromoformµg/L Grab Monthly EPAMethod

Chloroformµg/L Grab Monthly EPAMethod

624Bis(2‐Ethylhexyl)Phthalate

AcuteToxicity 96hour%survivalorTUaGrab Monthly SeeSection

V.A.below

ChronicToxicity TUcGrab Annually

SeeSectionV.B.below

ChronicToxicity(narrative)

Passed/Triggered6 ‐‐‐

CTRPollutants7 µg/LGrab

1X/permitterm StandardMethods

Title22Pollutants8 µg/LGrab

1X/permitterm StandardMethods

NitrateNitrogen,Total(asN)

mg/L Grab MonthlyStandardMethods

AmmoniaNitrogen,Total(asN)

mg/L GrabMonthly Standard

Methods

OrganicNitrogen,Total(asN)

Methods

NitriteNitrogen,Total(asN)

Methods

Phosphorus,Total(asP)

Methods

TableNotes:

1.Duringtheirrigationseason,whenthereisnodischargefromGraham’sPondtoDutchBillCreek,meandailyinfluentflowmaybecalculatedbasedonatotalizerreadingthatisnotreaddaily.

3.TotalcoliformsamplingshallbedailywhendischargingtotheLoades’propertyirrigationsystem.TotalcoliformsamplingmaybedecreasedtoweeklywhendischargingfromGraham’sPond.

4.ChlorineresidualshallbemonitoredbeforeandafterchlorinationandshalldemonstratethepresenceofachlorineresidualpriortodechlorinationandthatthereisnochlorineresidualintheeffluentafterdechlorinationpriortodischargetoGraham’sPond.ThismonitoringshalloccurcontinuouslywhentransferringfromthechlorinecontacttanktoGraham’sPond

Method5.Monitoringforeffluentandreceivingwaterhardnessshallbeconductedconcurrentlywitheffluentsamplingforcopper,lead,andsilver.

6.ThePermitteeshallincludereportingregardingcompliancewiththenarrativetoxicityobjectiveinReceivingWaterLimitationV.A.10byreportingwhetherthechronictoxicitytest“passed”or“triggered”inrelationtothechronictoxicitytriggerof1.6TUc(whereTUc=100/NOEC)foreachsinglesampleor1.0TUcasamonthlymedian.Fornarrativechronictoxicityreporting“Passed”shallbereportedwhenchronictoxicityeffluentresultsdonottriggeracceleratedtesting(e.g.,asinglesampleresultof≤1.6TUcoramonthlymedianof≤1.0TUc).“Triggered”shallbereportedwhenchronictoxicityeffluentresultstriggeracceleratedtestingbyexceedingthechronictoxicitytriggerof1.6TUcforasinglesampleor1.0TUcasamonthlymedian.

7.CTRpollutantsarethosepollutantsidentifiedintheCaliforniaToxicsRuleat40CFR131.38.Forprioritypollutants,themethodsmustmeetthelowestminimumlevel(ML)specifiedinAttachment4ofthePolicyforImplementationofToxicsStandardsforInlandSurfaceWaters,EnclosedBays,andEstuariesofCalifornia(StateImplementationPolicyorSIP,seesectionIII.B.3oftheFactSheet).InaccordancewithSection2.4oftheSIP,thePermitteeshallreporttheMLandMDLforeachsampleresult.Wherenomethodsarespecifiedforagivenpollutant,thePermitteeshallusemethodsapprovedbytheRegionalWaterBoard.Thelaboratory’scurrentMDLshallusemethodsapprovedbytheRegionalWaterBoard.Thelaboratory’scurrentMDLshallbedeterminedbytheprocedurefoundin40CFR136(revisedasofMay14,1999).

8.Title22pollutantsarethosepollutantsforwhichtheCaliforniaDepartmentofPublicHealthhasestablishedMaximumContaminantLevels(MCLs)attitle22,division4,chapter15,article4,section64431(InorganicChemicals)andarticle5.5,section64444(OrganicChemicals)oftheCCR.DuplicateanalysesarenotrequiredforpollutantsthatareidentifiedbothasCTRandtitle22pollutants.Monitoringrequiredinfuturepermittermsmaybereducedtoonlythosepollutantsdetectedinthetitle22samplingconductedduringthispermitterm.

B. MonitoringLocationEFF‐002

1. ThePermitteeshallmonitordisinfected,dechlorinatedwastewatertobedischargedfromGraham’sPondtoDutchBillCreekatDischargePoint002,asmeasuredatMonitoringLocationEFF‐002duringperiodsofdischargetoDutchBillCreekasfollows:

TableE‐5. EffluentMonitoringforDischargesfromGraham’sPondtoDutchBillCreek–MonitoringLocationEFF‐002

Parameter Units SampleType

MinimumSamplingFrequency

RequiredAnalyticalTestMethod

MeanDailyFlow mgd Meter Continuous ‐‐

pH standardunits

Grab Weekly StandardMethods1

DissolvedOxygen mg/L Grab Weekly StandardMethodsTemperature °For°C Grab Weekly StandardMethodsTurbidity NTU Grab Weekly StandardMethods

Hardness,Total(as mg/L Grab Monthly StandardMethods

CaCO3)

TableNotes:

V. WHOLEEFFLUENTTOXICITYTESTINGREQUIREMENTS

A. AcuteToxicityTesting

ThePermitteeshallconductacutewholeeffluenttoxicitytesting(WET)todeterminecompliancewiththeeffluentlimitationforacutetoxicityestablishedbysectionIV.A.1oftheOrder.

1. TestFrequency.ThePermitteeshallconductacuteWETtestinginaccordancewiththescheduleestablishedbythisMRPwhiledischargingatDischargePoint001,assummarizedinMRPsectionIV.A.1andTableE‐4,above.

2. SampleType.For96‐hourstaticrenewalor96‐hourstaticnon‐renewaltesting,theeffluentsamplesshallbegrabsamplescollectedatMonitoringLocationEFF‐001.

3. TestSpecies.TestspeciesforacuteWETtestingshallbeavertebrate,therainbowtrout,Oncorhynchusmykissandaninvertebrate,thewaterflea,Ceriodaphniadubia,foratleastthefirsttwosuitesoftestsconductedwithin12monthsaftertheeffectivedateoftheOrder.Afterthisscreeningperiod,monitoringshallbeconductedmonthlyusingthemostsensitivespecies.Atleastonceeveryfiveyears,thePermitteeshallre‐screenwiththetwospecieslistedaboveandcontinuemonitoringwiththemostsensitivespecies.ThenexttwospeciesacuteWETtestshallbeconductedbyMarch31,2014.

4. TestMethods.ThepresenceofacutetoxicityshallbeestimatedasspecifiedinMethodsforMeasuringtheAcuteToxicityofEffluentsandReceivingWaterstoFreshwaterandMarineOrganisms(USEPAReportNo.EPA‐821‐R‐02‐012,5theditionorsubsequenteditions),orothermethodsapprovedbytheExecutiveOfficer.

TestproceduresrelatedtopHcontrol,samplefiltration,aeration,temperaturecontrolandsampledechlorinationshallbeperformedinaccordancewiththeUSEPAmethodandfullyexplainedandjustifiedineachacutetoxicityreportsubmittedtotheRegionalWaterBoard.ThecontrolofpHinacutetoxicitytestsisallowed,providedthetestpHismaintainedattheeffluentpHmeasuredatthetimeofsamplecollection,andthecontrolofpHisdoneinamannerthathastheleastinfluenceonthetestwater

chemistryandonthetoxicityofotherpHsensitivematerialssuchassomeheavymetals,sulfide,andcyanide.

5. TestDilutions.Theacutetoxicitytestshallbeconductedusing100percenteffluentcollectedatMonitoringLocationEFF‐001.

6. TestFailure.Ifanacutetoxicitytestdoesnotmeetalltestacceptabilitycriteria,asspecifiedinthetestmethod,thePermitteeshallre‐sampleandre‐testassoonaspossible,nottoexceed7daysfollowingnotificationoftestfailure.

7. AcceleratedMonitoring.Iftheresultofanyacutetoxicitytestfailstomeetthesingletestminimumlimitation(70percentsurvival),andthetestingmeetsalltestacceptabilitycriteria,thePermitteeshalltaketwomoresamples,onewithin14daysandonewithin21daysfollowingreceiptoftheinitialsampleresult.Ifanyoneoftheadditionalsamplesdonotcomplywiththethreesamplemedianlimitation(90percentsurvival),thePermitteeshallinitiateaToxicityReductionEvaluation(TRE)inaccordancewithsectionVI.C.2.a.iioftheOrder.Ifthetwoadditionalsamplesareincompliancewiththeacutetoxicityrequirementandtestingmeetsalltestacceptabilitycriteria,thenaTREwillnotberequired.Ifthedischargestopsbeforeadditionalsamplescanbecollected,thePermitteeshallcontacttheExecutiveOfficerwithin21dayswithaplantodemonstratecompliancewiththeeffluentlimitation.

8. Notification.ThePermitteeshallnotifytheRegionalWaterBoardverballywithin72hoursandinwritingwithin14daysafterthereceiptoftestresultsexceedingtheacutetoxicityeffluentlimitationduringregularoracceleratedmonitoring.ThenotificationwilldescribeactionsthePermitteehastakenorwilltaketoinvestigateandcorrectthecause(s)oftoxicity.ItmayalsoincludeastatusreportonanyactionsrequiredbythisOrder,withascheduleforactionsnotyetcompleted.Ifnoactionshavebeentaken,thereasonsshallbegiven.

9. Reporting.Theacutetoxicitytestresultsshallincludethecontractinglaboratory’scompletereportprovidedtothePermitteeandshallbeinaccordancewithsection12(ReportPreparation)ofMethodsforMeasuringtheAcuteToxicityofEffluentsandReceivingWaterstoFreshwaterandMarineOrganisms.Thesubmittedreportshallclearlyidentifythetestresults.

10. AmmoniaToxicity.Theacutetoxicitytestshallbeconductedwithoutmodificationstoeliminateammoniatoxicity.

B. ChronicToxicityTesting

ThePermitteeshallconductchronictoxicitytestingtodemonstratecompliancewiththeBasinPlan’swaterqualityobjectivefortoxicity.ThePermitteeshallmeetthefollowingchronictoxicitytestingrequirements:

1. TestFrequency.ThePermitteeshallconductannualchronicWETtestinginaccordancewiththescheduleestablishedbythisMRPwhiledischargingatDischargePoint001,assummarizedinMRPsectionIV.A.1andTableE‐4,above.

2. SampleType.For96‐hourstaticrenewalor96‐hourstaticnon‐renewaltesting,theeffluentsamplesshallbegrabsamplescollectedatMonitoringLocationEFF‐001andshallberepresentativeofthevolumeandqualityofthedischarge..Whentestsareconductedoff‐site,aminimumofthreesamplesshallbecollected,inaccordancewithUSEPAtestmethods.AnyreceivingwaterusedforcontrolordilutionwatershallbeagrabsampleobtainedfromMonitoringLocationRSW‐001,asidentifiedinTableE‐2ofthisMRP.

3. TestSpecies.TestspeciesforchronicWETtestingshallbeavertebrate,thefatheadminnow,Pimephalespromelas(LarvalSurvivalandGrowthTestMethod1000.0),aninvertebrate,thewaterflea,Ceriodaphniadubia(SurvivalandReproductionTestMethod1002.01),andaplant,thegreenalgae,Selanastrumcapricornutum(alsonamedRaphidocelissubcapitata)(GrowthTestMethod1003.0).Atleastonetimeevery5years,thePermitteeshallconducttwosuitesofchronicWETtestingusingthethreespeciesidentifiedabove.Afterthisscreeningperiod,monitoringshallbeconductedannuallyusingthemostsensitivespecies.ThenextmultiplespecieschronicWETtestshallbeconductedbyMarch31,2014.

4. TestMethods.ThepresenceofchronictoxicityshallbeestimatedasspecifiedinUSEPA’sShort‐TermMethodsforEstimatingtheChronicToxicityofEffluentsandReceivingWatertoFreshwaterOrganisms(USEPAReportNo.EPA‐821‐R‐02‐013,orsubsequenteditions).

TestproceduresrelatedtopHcontrol,samplefiltration,aeration,temperaturecontrolandsampledechlorinationshallbeperformedinaccordancewiththeUSEPAmethodandfullyexplainedandjustifiedineachacutetoxicityreportsubmittedtotheRegionalWaterBoard.ThecontrolofpHinchronictoxicitytestsisallowed,providedthetestpHismaintainedatthepHofthereceivingwatermeasuredatthetimeofsamplecollection,andthecontrolofpHisdoneinamannerthathastheleastinfluenceonthetestwaterchemistryandonthetoxicityofotherpHsensitivematerialssuchassomeheavymetals,sulfideandcyanide.

5. TestDilutions.Thechronictoxicitytestshallbeconductedusingaseriesofatleastfivedilutionsandacontrol.Theseriesshallconsistofthefollowingdilutionseries:12.5,25,50,75,and100percent,andacontrol.EffluentdilutionwaterandcontrolwatermaybereceivingwatercollectedatRSW‐001orstandardsyntheticlaboratorywater,asdescribedintheUSEPAtestmethodsmanual.Wherethereceivingwaterdoesnotexhibittoxicityorbiostimulatoryeffects,receivingwaterispreferredforcontrolanddilutionwater.Ifthedilutionwaterusedisdifferentfromthetestorganismculturewater,asecondcontrolusingculturewatershallbeused.

6. ReferenceToxicant.Iforganismsarenotculturedin‐house,concurrenttestingwithareferencetoxicantshallbeconducted.Whereorganismsareculturedin‐house,monthlyreferencetoxicanttestingissufficient.Referencetoxicanttestsalsoshallbeconductedusingthesametestconditionsastheeffluenttoxicitytests(e.g.,sametestduration,etc.).

7. TestFailure.Ifeitherthereferencetoxicanttestorthechronictoxicitytestdoesnotmeetalltestacceptabilitycriteria,asspecifiedinthetestmethod,thePermitteeshallre‐sampleandre‐testassoonaspossible,nottoexceed14daysfollowingnotificationoftestfailure.

8. Notification.ThePermitteeshallnotifytheRegionalWaterBoardverballywithin72hoursandinwritingwithin14daysafterthereceiptoftestresultsexceedingthechronictoxicitytriggerduringregularoracceleratedmonitoring.

9. AcceleratedMonitoringRequirements.Iftheresultofanyroutinechronictoxicitytestexceedsthechronictoxicitymonitoringtriggerof1.6TUcasasinglesampleresultor1.0TUcasamonthlymedian,asspecifiedinsectionVI.C.2.a.oftheOrder,andthetestingmeetsalltestacceptabilitycriteria,thePermitteeshallinitiateacceleratedmonitoring.Acceleratedmonitoringshallconsistofuptofouradditionaleffluentsamplesanddilutionseries(specifiedinnumber5above)–withonetestforeachtestspeciesshowingtoxicityresultsexceedingthetoxicitytrigger,asdefinedbyconditionsa.throughc.,below.Acceleratedmonitoringtestsshallbeconductedapproximatelyeveryweekovera4weekperiod.

Testingshallcommencewithin14daysofreceiptofinitialsampleresultswhichindicatedanexceedanceofthechronictoxicitytrigger.Ifthedischargewillceasebeforetheadditionalsamplescanbecollected,thePermitteeshallcontacttheExecutiveOfficerwithin21dayswithaplantoaddresselevatedlevelsofchronictoxicityineffluentand/orreceivingwater.ThefollowingprotocolshallbeusedforacceleratedmonitoringandTREimplementation:

a. Iftheresultofanyacceleratedtoxicitytestexceeds1.0TUC,thePermitteeshallceaseacceleratedmonitoringand,withinthirty(30)daysofthedateofcompletionoftheacceleratedmonitoringtest,initiatetheTREWorkplandevelopedinaccordancewithSectionVI.C.2.a.(2)oftheOrdertoinvestigatethecause(s)andidentifycorrectiveactionstoreduceoreliminatethechronictoxicity.Withinthirty(30)daysofcompletingtheTREWorkplanimplementation,thePermitteeshallsubmitareporttotheRegionalWaterBoardincluding,ataminimum:

i. SpecificactionsthePermitteetooktoinvestigateandidentifythecause(s)oftoxicity,includingaTREWETmonitoringschedule;

ii. SpecificactionsthePermitteetooktomitigatetheimpactofthedischargeandpreventtherecurrenceoftoxicity;

iii. Recommendationsforfurtheractionstomitigatecontinuedtoxicity,ifneeded;and

iv. Ascheduleforimplementationofrecommendedactions.

b. Iftheresultsoffourconsecutiveacceleratedmonitoringtestsdonotexceed1.0TUc,thePermitteemayceaseacceleratedmonitoringandresumeregularchronictoxicitymonitoring.However,ifthereisadequateevidenceofapatternofeffluenttoxicity,theRegionalWaterBoard’sExecutiveOfficermayrequirethatthePermitteeinitiateaTRE.

c. Ifthesource(s)ofthetoxicityiseasilyidentified(i.e.temporaryplantupset),thePermitteeshallmakenecessarycorrectionstothefacilityandshallcontinueacceleratedmonitoringuntilfour(4)consecutiveacceleratedtestsdonotexceedthemonitoring“trigger.”Uponconfirmationthatthechronictoxicityhasbeenremoved,thePermitteemayceaseacceleratedmonitoringandresumeregularchronictoxicitymonitoring.

10. AmmoniaToxicity.Thechronictoxicitytestshallbeconductedwithoutmodificationstoeliminateammoniatoxicity.

C. ChronicToxicityReporting

1. RoutineReporting.Alltoxicitytestreportsshallincludethecontractinglaboratory’scompletereportprovidedtothePermitteeandshallbeinaccordancewiththeappropriate“ReportPreparationandTestReview”sectionsofthemethodmanualsandthisMonitoringandReportingProgram.

Regularchronictoxicitymonitoringresultsshallbesubmittedwithin30daysfollowingcompletionofthetest.TheWETtestreportshallcontainanarrativereportthatincludesdetailsaboutWETtestproceduresandresults,includingthefollowing:

a. receiptandhandlingoftheeffluentsamplethatincludesatabularsummaryofinitialwaterqualitycharacteristics;

b. thesourceandmake‐upofthelabcontrol/diluentwaterusedforthetest;

c. anymanipulationsdonetolabcontrol/diluentandeffluentsuchasfiltration,nutrientaddition,etc.;

d. identificationofanyreferencetoxicanttestingperformed;

e. tabularsummaryoftestresultsforcontrolwaterandeacheffluentdilutionandstatisticssummarytoincludecalculationofNOEC,TUcandIC25;

f. identificationofanyanomaliesornuancesinthetestproceduresorresults;and

g. summaryandconclusionssection.

Testresultsshallinclude,ataminimum,foreachtest:

a. Sampledate(s);

b. Testinitiationdate;

c. Testspecies;

d. Endpointvaluesforeachdilution(e.g.,numberofyoung,growthrate,percentsurvival);

e. NOECvalue(s)inpercenteffluent;

f. IC15,IC25,IC40,andIC50values(orEC15,EC25…etc.)inpercenteffluent;

g. TUcvalues(100/NOEC);

h. Meanpercentmortality(±s.d.)after96hoursin100percenteffluent(ifapplicable);

i. NOECandLOECvaluesforreferencetoxicanttest(s);

j. IC50orEC50value(s)forreferencetoxicanttest(s);

k. Availablewaterqualitymeasurementsforeachtest(e.g.,pH,DO,temperature,conductivity,hardness,salinity,ammonia);

l. Statisticalmethodsusedtocalculateendpoints;

m. Thestatisticaloutputpage,whichincludesthecalculationofpercentminimumsignificantdifference(PMSD);and

n. Resultsofapplicablereferencetoxicantdatawiththestatisticaloutputpageidentifyingthespecies,NOEC,LOEC,typeoftoxicant,dilutionwaterused,concentrationsused,PMSDanddatestested;thereferencetoxicantcontrolchartsforeachendpoint,toincludesummariesofreferencetoxicanttestsperformedbythecontractinglaboratory;andanyinformationondeviationsfromstandardtestproceduresorproblemsencounteredincompletingthetestandhowtheproblemswereresolved.

2. QualityAssuranceReporting.Becausethepermitrequiressublethalhypothesistestingendpointsfrommethods1000.0,1002.0,and1003.0inthetestmethodsmanualtitledShort‐termMethodsforEstimatingtheChronicToxicityofEffluentsandReceivingWaterstoFreshwaterOrganisms(EPA‐821‐R‐02‐013,2002),with‐intestvariabilitymustbereviewedforacceptabilityandvariabilitycriteria(upperandlowerPMSDbounds)mustbeapplied,asdirectedundersection10.2.8–TestVariabilityofthetestmethodsmanual.Undersection10.2.8,thecalculatedPMSDforbothreferencetoxicanttestandeffluenttoxicitytestresultsmustbecomparedwiththeupperandlowerPMSDboundsvariabilitycriteriaspecifiedinTable6–VariabilityCriteria(UpperandLowerPMSDBounds)forSublethalHypothesisTestingEndpointsSubmittedUnderNPDESPermits,followingthereviewcriteriainparagraphs10.2.8.2.1through10.2.8.2.5ofthetestmethodsmanual.Basedonthisreview,onlyacceptedeffluenttoxicitytestresultsshallbereported.

3. ComplianceSummary.Themonthlyself‐monitoringreportsshallcontainanupdatedchronologyofchronictoxicitytestresultsexpressedinTUc,andorganizedbytestspecies,typeoftest(survival,growthorreproduction),andmonitoringfrequency(routine,accelerated,orTRE).ThefinalreportshallclearlydemonstratethatthePermitteeisincompliancewitheffluentlimitationsandotherpermitrequirements.

VI. LANDDISCHARGEMONITORINGREQUIREMENTS

AspecialstudyisneededtodetermineifirrigationoftheLoades’propertyisatagronomicrates(reclamation)orgreaterthanagronomicrates(landdischarge).SectionVI.C.2.boftheOrderrequiresthePermitteetoconductaspecialstudytomakethisdetermination.Ifirrigationisatgreaterthanagronomicrates,thePermitteeshallcomplywiththelanddischargespecificationsinsectionIV.BoftheOrder.

VII. IRRIGATION/RECLAMATIONMONITORINGREQUIREMENTS

AspecialstudyisneededtodetermineifirrigationoftheLoades’propertyisatagronomicrates(reclamation)orgreaterthanagronomicrates(landdischarge).SectionVI.C.2.boftheOrderrequiresthePermitteetoconductaspecialstudytomakethisdetermination.Ifirrigationisatorbelowagronomicrates,thePermitteeshallcomplywiththereclamationspecificationsinsectionIV.CoftheOrder.

A. Irrigation/ReclamationMonitoringRequirements

ThefollowingirrigationmonitoringrequirementsareapplicableduringperiodswhentheLoades’propertyirrigationsystemisbeingused.MonitoringrequirementsidentifiedinthissectionarenotapplicableduringperiodswhenalleffluentisdischargedtoDutchBillCreek.ThePermitteeshallmonitortreated,disinfectedwastewaterpriortoreclamationatDischargePoint003,asmeasuredatMonitoringLocationEFF‐003asfollows:

TableE‐6. Irrigation/ReclamationMonitoringRequirements–MonitoringLocationEFF‐003

Flow1 mgd Meter Continuous Meter

pH Standardunits

Grab Monthly StandardMethods

NitrateNitrogen2 mg/L Grab Monthly StandardMethodsNitriteNitrogen2 mg/L Grab Monthly StandardMethodsAmmoniaNitrogen2 mg/L Grab Monthly StandardMethodsOrganicNitrogen2 mg/L Grab Monthly StandardMethodsTDS mg/L Grab Monthly3 StandardMethodsChloride mg/L Grab Monthly3 StandardMethodsBoron mg/L Grab Monthly3 StandardMethodsSodium mg/L Grab Monthly3 StandardMethodsVisualObservations4 ‐‐ ‐‐ Daily Visual

TableNotes:

1.Eachmonth,thePermitteeshallreportthenumberofdaysthattreatedwastewaterwasusedforreclamation,aswellastheaverageandmaximumdailyflowrate.

2.Monitoringfornitrate,nitrite,ammonia,andorganicnitrogenisforthepurposeofdeterminingtotalnitrogenconcentrationforagronomicratecalculations.

3.Themonitoringfrequencyfortotaldissolvedsolids,chloride,boron,andsodiummaybereducedoreliminatedwiththeapprovaloftheExecutiveOfficer,ifmonitoringdatademonstratesthatconcentrationsoftheseparametersareconsistentlylowerthanwaterqualityobjectivesforprotectionofgroundwater.

4.Duringperiodsofdischargetotheirrigationsystem,visualobservationsshallbeconducteddailytoverifycompliancewithirrigation/recycledwaterrequirementsinsectionIV.CoftheOrderandtoconfirmproperoperationoftheirrigation/recycledwatersystemandassociatedBMPs.Themonthlymonitoringreportshallincludethedailyvolumeoftreatedwastewaterdischargedtotheirrigationsystemandanyobservationsindicatingnon‐compliancewiththeprovisionsofthewastedischargerequirements,includingrecordsofanymalfunctionsorfindingsofimproperoperation,includingbutnotlimitedtoodors,evidenceofsurfacerun‐off,orpondingthatexceeds48hours..

B. RecycledWaterProductionandUse.

Forreclamationuse,recycledwaterqualitycharacteristicsandprecipitationdatashallbeusedtoascertainnitrogenloadingratesateachrecycledwaterusesite.ThefollowinginformationshallbereportedforanynewusesiteaddedafterthepermitadoptiondateandforexistingusesitesuponcompletionoftheagronomicrateevaluationrequiredbyProvisionVI.C.2.c.oftheOrder.

TableE‐7. RecycledWaterProductionandUse

Parameter Units SampleTypeMinimumSampling

Frequency

Volumeofrecycledwater1 Acre‐feet Meter MonthlyTotalareaofapplication Acres Observation MonthlyTotalNitrogenapplicationrate2,3 lbs/acre‐month Calculation MonthlyRainfall Inches Gage DailyTableNotes:

1.Estimationofthevolumeofrecycledwatershallnotincludeotherpotableornon‐potable“make‐up”waterusedinconjunctionwithrecycledwater.

2.Nitrogenapplicationrateshallconsidernitrogencontentoftherecycledwater,basedoneffluentmonitoringdata.

3.Nitrogenconcentrationsshallbecalculatedandreported“asN”.Forexample,nitrate‐nitrogen=27mg/LasNO3shallbeconvertedandreportedasnitrate‐nitrogen=6.1mg/LasNusingaconversionfactorof15.067(N)/62.0049(NO3).

IX. RECEIVINGWATERMONITORINGREQUIREMENTS–SURFACEWATERANDGROUNDWATER

A. SurfaceWaterMonitoringLocationsRSW‐001andRSW‐002

1. ThePermitteeshallmonitorupstreamofGraham’sPondatMonitoringLocationRSW‐001anddownstreamofGraham’sPondatMonitoringLocationRSW‐002,duringperiodsofdischargetoDutchBillCreekasfollows:

TableE‐8. ReceivingWaterMonitoringRequirements

mg/L Grab Monthly StandardMethods1

DissolvedOxygen mg/L Grab Weekly StandardMethods1

pH2 standardunits

Grab Weekly StandardMethods

Turbidity NTU Grab Weekly StandardMethodsTemperature2 °For°C Grab Weekly StandardMethodsHardness,Total(asCaCO3)2 mg/L Grab Monthly StandardMethodsAmmoniaNitrogen,Total(asN)2

mg/L Grab Monthly StandardMethods

UnionizedAmmonia(asN) mg/L Calculation Monthly ‐‐NitrateNitrogen,Total(asN)

mg/L Grab Monthly StandardMethods

Phosphorus,Total(asP) mg/L Grab Monthly StandardMethodsStreamFlow mgd Gage Daily ‐‐‐

Dilution %ofStreamFlow

Calculation Daily ‐‐‐

TableNotes:

1.InaccordancewiththecurrenteditionofStandardMethodsforExaminationofWaterandWastewater(AmericanPublicHealthAdministration)orcurrenttestproceduresspecifiedin40CFRPart136.

2.EffluentandreceivingwaterpH,temperature,andammoniasamplesshallbecollectedonthesamedayandatapproximatelythesametime.

B. Groundwater

Thereisnogroundwatermonitoringrequirementinthismonitoringandreportingprogram.Groundwatermonitoringmaybeestablishedinthefuture,ifnecessary,toassessimpactsofeffluentdischargetotheirrigationsystem.

X. OTHERMONITORINGREQUIREMENTS

A. DisinfectionProcessMonitoringforChlorineDisinfectionSystem(EFF‐001)

1. Monitoring.Thechlorineresidualoftheeffluentshallbemonitoredcontinuouslyatapointpriortodechlorinationandrecorded.

2. Compliance.Themonitoringdatashalldemonstratethatthereisachlorineresidualattheendofthechlorinedisinfectionsystematalltimes.Inaddition,monitoringshalldemonstratecompliancewithtotalcoliformeffluentlimitationsinsectionsIV.A.1.candIV.C.1.boftheOrder.

3. Reporting.Ifeffluentfollowingdisinfectiondoesnothaveachlorineresidual,orifthereisafailureofthechlorinedisinfectionsystem,theeventshallbereportedtotheRegionalWaterBoardinaccordancewithStandardProvisionVI.A.2.boftheOrder.

B. VisualMonitoringofDischargetoGraham’sPond(EFF‐001),DischargefromGraham’sPond(EFF‐002),andDownstreamReceivingwater(RSW‐002)

VisualobservationsofthedischargetoGraham’sPond(EFF‐001),fromGraham’sPond(EFF‐002)andDutchBillCreekdownstreamofthedischargefromGraham’sPond(RSW‐002)shallberecordedmonthlyandonthefirstdayofeachintermittentdischarge.Visualmonitoringshallinclude,butnotbelimitedto,observationsforfloatingmaterials,coloration,objectionableaquaticgrowths,oilandgreasefilms,andodors.VisualobservationsshallberecordedandincludedinthePermittee’smonthlymonitoringreports.

XI. REPORTINGREQUIREMENTS

A. GeneralMonitoringandReportingRequirements

1. ThePermitteeshallcomplywithallStandardProvisions(AttachmentD)relatedtomonitoring,reporting,andrecordkeeping.

2. SchedulesofCompliance.Ifapplicable,thePermitteeshallsubmitallreportsanddocumentationrequiredbycomplianceschedulesthatareestablishedbythisOrder.SuchreportsanddocumentationshallbesubmittedtotheRegionalWaterBoardonorbeforeeachcompliancedateestablishedbythisOrder.Ifnoncomplianceisreported,thePermitteeshalldescribethereasonsfornoncomplianceandaspecificdatewhencompliancewillbeachieved.ThePermitteeshallnotifytheRegionalWaterBoardwhenitreturnstocompliancewithapplicablecompliancedatesestablishedbyschedulesofcompliance.

B. Self‐MonitoringReports(SMRs)

1. ThePermitteeshallsubmitelectronicSelf‐MonitoringReports(eSMRs)usingtheStateWaterBoard’sCaliforniaIntegratedWaterQualitySystem(CIWQS)ProgramWebsite(http://www.waterboards.ca.gov/ciwqs/index.html).TheCIWQSWebsitewillprovideadditionaldirectionsforSMRsubmittalintheeventtherewillbeserviceinterruptionforelectronicsubmittal.ThePermitteeshallmaintainsufficientstaffingandresourcestoensureitsubmitseSMRsthatarecompleteandtimely.Thisincludesprovisionoftrainingandsupervisionofindividuals(e.g.,Permitteepersonnelorconsultant)onhowtoprepareandsubmiteSMRs.

2. ThePermitteeshallreportintheSMRtheresultsforallmonitoringspecifiedinthisMRPundersectionsIIIthroughIX.ThePermitteeshallsubmitmonthlySMRsincludingtheresultsofallrequiredmonitoringusingUSEPA‐approvedtestmethodsorothertestmethodsspecifiedinthisOrder.IfthePermitteemonitorsanypollutantmorefrequentlythanrequiredbythisOrder,theresultsofthismonitoringshallbeincludedinthecalculationsandreportingofthedatasubmittedintheSMR.

3. Allmonitoringresultsreportedshallbesupportedbytheinclusionofthecompleteanalyticalreportfromthelaboratorythatconductedtheanalyses.

4. Monitoringperiodsandreportingforallrequiredmonitoringshallbecompletedaccordingtothefollowingschedule:

TableE‐9. MonitoringPeriodsandReportingScheduleSamplingFrequency MonitoringPeriodBeginsOn… MonitoringPeriod SMRDueDate

Continuous Permiteffectivedate AllFirstdayofsecondcalendarmonthfollowingmonthofsampling

Daily Permiteffectivedate

(Midnightthrough11:59PM)orany24‐hourperiodthatreasonablyrepresentsacalendardayforpurposesofsampling.

Firstdayofsecondcalendarmonthfollowingmonthofsampling

WeeklySundayfollowingpermiteffectivedateoronpermiteffectivedateifonaSunday

SundaythroughSaturdayFirstdayofsecondcalendarmonthfollowingmonthofsampling

Monthly

Firstdayofcalendarmonthfollowingpermiteffectivedateoronpermiteffectivedateifthatdateisfirstdayofthemonth

Firstdayofcalendarmonththroughlastdayofcalendarmonth

Firstdayofsecondcalendarmonthfollowingmonthofsampling

SamplingFrequency

MonitoringPeriodBeginsOn… MonitoringPeriod SMRDueDate

QuarterlyClosestofJanuary1,April1,July1,orOctober1following(oron)permiteffectivedate

JanuarythroughMarchAprilthroughJuneJulythroughSeptemberOctoberthroughDecember

Firstdayofsecondcalendarmonthfollowingendofquarter

Annually January1following(oron)permiteffectivedate

January1throughDecember31

March1,eachyear

5. ReportingProtocols.ThePermitteeshallreportwitheachsampleresultthe

applicableML,theRLandthecurrentMethodDetectionLimit(MDL),asdeterminedbytheprocedurein40CFRPart136.ThePermitteeshallreporttheresultsofanalyticaldeterminationsforthepresenceofchemicalconstituentsinasampleusingthefollowingreportingprotocols:

a. SampleresultsgreaterthanorequaltothereportedMLshallbereportedasmeasuredbythelaboratory(i.e.,themeasuredchemicalconcentrationinthesample).

b. SampleresultslessthantheRL,butgreaterthanorequaltothelaboratory’sMDL,shallbereportedas“Detected,butNotQuantified,”orDNQ.Theestimatedchemicalconcentrationofthesampleshallalsobereported.Forthepurposesofdatacollection,thelaboratoryshallwritetheestimatedchemicalconcentrationnexttoDNQaswellasthewords“EstimatedConcentration”(maybeshortenedto“Est.Conc.”).Thelaboratorymay,ifsuchinformationisavailable,includenumericalestimatesofthedataqualityforthereportedresult.Numericalestimatesofdataqualitymaybepercentaccuracy(+apercentageofthereportedvalue),numericalranges(lowtohigh),oranyothermeansconsideredappropriatebythelaboratory.

c. Sampleresultslessthanthelaboratory’sMDLshallbereportedas“NotDetected,”orND.

d. PermitteesaretoinstructlaboratoriestoestablishcalibrationstandardssothattheMLvalue(oritsequivalentifthereisdifferentialtreatmentofsamplesrelativetocalibrationstandards)isthelowestcalibrationstandard.AtnotimeisthePermitteetouseanalyticaldataderivedfromextrapolationbeyondthelowestpointofthecalibrationcurve.

6. ThePermitteeshallsubmitSMRsinaccordancewiththefollowingrequirements:

a. ThePermitteeshallarrangeallreporteddatainatabularformat.Thedatashallbesummarizedtoclearlyillustratewhetherthefacilityisoperatingincompliancewithinterimand/orfinaleffluentlimitations.Thereporteddatashallincludecalculationofalleffluentlimitationsthatrequireaveraging,takingofamedian,orothercomputation.ThePermitteeisnotrequiredtoduplicatethesubmittalofdatathatisenteredinatabularformatwithinCIWQS.WhenelectronicsubmittalofdataisrequiredandCIWQSdoesnotprovideforentryintoatabularformatwithinthesystem,thePermitteeshallelectronicallysubmitthedatainatabularformatasanattachment.Duringperiodsofdischargetotheirrigationsystem,thereportsshallcertify“landdischarge”.

b. ThePermitteeshallattachacoverlettertotheSMR.Theinformationcontainedinthecoverlettershallclearlyidentify:

(1.) Facilitynameandaddress;

(2.) WDIDnumber;

(3.) Applicableperiodofmonitoringandreporting;

(4.) ViolationsoftheWDRs(identifiedviolationsmustincludeadescriptionoftherequirementthatwasviolatedandadescriptionoftheviolation);

(5.) Correctiveactionstakenorplanned;and

(6.) Theproposedtimescheduleforcorrectiveactions.

d. ElectronicSMRsmustbesubmittedtotheRegionalWaterBoard,signedandcertifiedasrequiredbytheStandardProvisions(AttachmentD),totheCIWQSProgramWebsite(http://www.waterboards.ca.gov/ciwqs/index.html).IntheeventthatpapersubmittalofSMRsisrequired,theDischargeshallsubmittheSMRtotheaddresslistedbelow:

RegionalWaterQualityControlBoardNorthCoastRegion5550SkylaneBlvd.,SuiteASantaRosa,CA95403

C. DischargeMonitoringReports(DMRs)

DMRsarecurrentlyrequiredforfacilitiesdesignatedasmajordischargers.ThisFacilityisaminordischarger,therefore,DMRrequirementsdonotapplyatthistime.

AsdescribedinSectionX.B.1above,atanytimeduringthetermofthispermit,the1.StateorRegionalWaterBoardmaynotifythePermitteetoelectronicallysubmitself‐monitoringreportsthatwillsatisfyfederalrequirementsforsubmittalofDischarge

MonitoringReports(DMRs).Untilsuchnotificationisgiven,majordischargersshallsubmitDMRsinaccordancewiththerequirementsdescribedbelow.

DMRsmustbesignedandcertifiedasrequiredbythestandardprovisions2.(AttachmentD).TheDischargeshallsubmittheoriginalDMRandonecopyoftheDMRtotheaddresslistedbelow:

STANDARDMAIL FEDEX/UPS/OTHERPRIVATECARRIERS

StateWaterResourcesControlBoardDivisionofWaterQuality

c/oDischargeMonitoringReportProcessingCenterPostOfficeBox100

Sacramento,CA95812‐1000

StateWaterResourcesControlBoardDivisionofWaterQualityc/oDMRProcessingCenter1001IStreet,15thFloorSacramento,CA95814

AlldischargemonitoringresultsmustbereportedontheofficialUSEPApre‐printed3.DMRforms(EPAForm3320‐1).Formsthatareself‐generatedormodifiedcannotbeaccepted.

D. OtherReports

1. ThePermitteeshallreporttheresultsofanyspecialstudies,acuteandchronictoxicitytesting,TRE/TIE,PMP,andPollutionPreventionPlanrequiredbySpecialProvisions–VI.C.2andVI.C.3ofthisOrder.

2. IrrigationofLoades’Property

a. IrrigationOperationsReporting

i. EachmonththatthePermitteeprovidesrecycledwaterforirrigationoftheLoades’property,thePermitteeshallmonitorinaccordancewithsectionVIIofthisMRPandreporttheresultsonitsmonthlymonitoringreport.

ii. Theirrigationsiteshallbeinspectedeachdaythatirrigationoccurstoensurethatrecycledwaterisappliedinamannerthatcomplieswithirrigation/recycledwaterrequirementsidentifiedinsectionIV.CoftheOrder.ThePermitteeshallreport:

(a) Inspectiondates;

(b) Allobservationsofrecycledwateroverapplicationand/orrunoff;

(c) Asummaryofoperationalproblems,plantequipmentmalfunctions,andanydiversionofrecycledwaterwhichdoesnotmeettherequirementsspecifiedinthisOrder;

(d) DocumentationofnotificationstousersifanyrecycledwaterwasdeliveredthatdidnotmeettherequirementsspecifiedinthisOrder;and

(e) Arecordofequipmentorprocessfailuresinitiatinganalarm,aswellasanycorrectiveandpreventativeactions.

b. AnnualIrrigation/RecycledWaterReport.Theannualreportshallincludebutnotbelimitedtothefollowing;

i. Acompliancesummaryanddiscussionofthecompliancerecordforthepriorcalendaryear,including:

(a) Ifviolationsoccurred,thereportshallalsodiscussthecorrectiveactionstakenandplannedtobringthereclamationprogramintofullcompliancewiththisOrder.

(b) Anevaluationofhydraulicandnutrientapplicationrates.Thisevaluationshalleitherdemonstratethattreatedwastewaterisbeingappliedatagronomicratesorthatanyapplicationinexcessofagronomicratesdidnotcauseimpactstowaterquality.Ifactualorpotentialimpactstowaterqualityareidentified,thePermitteeshallidentifyandimplementcorrectiveactions,asnecessary.

(c) CertificationthatallreasonableBMPsandmanagementpracticeswereimplementedtoensureefficientandcompliantoperationoftheirrigationsystem;and

(d) Identificationofanyotherproblemsthatoccurredintheirrigationsystemduringtheprioryearandplanstorectifythoseproblemsinthecomingyear.

ii. Asummaryofscheduledandnon‐scheduledmaintenanceoftheirrigationsystemappurtenancesandirrigationareas.

3. AnnualReport.ThePermitteeshallsubmitanannualreporttotheRegionalWaterBoardforeachcalendaryear.ThereportshallbesubmittedbyMarch1stofthefollowingyear.Thereportshall,ataminimum,includethefollowing:

a. Bothtabularand,whereappropriate,graphicalsummariesofthemonitoringdataanddisposalrecordsfromthepreviousyear.IfthePermitteemonitorsanypollutantmorefrequentlythanrequiredbythisOrder,usingtestproceduresapprovedunder40CFR,section136orasspecifiedinthisOrder,theresultsofthismonitoringshallbeincludedinthecalculationandreportofthedatasubmittedSMR.

b. AcomprehensivediscussionoftheFacility’scompliance(orlackthereof)withalleffluentlimitationsandotherWDRs,andthecorrectiveactionstakenorplanned,whichmaybeneededtobringthedischargeintofullcompliancewiththeOrder.

c. Thenames,certificategrades,andgeneralresponsibilitiesofallpersonsemployedattheFacility;

d. Thenamesandtelephonenumbersofpersonstocontactregardingthewastewatertreatmentfacilityforemergencyandroutinesituations;

e. Astatementcertifyingwhentheflowmeter(s)andothermonitoringinstrumentsanddeviceswerelastcalibrated,includingidentificationofwhoperformedthecalibration;and

f. Astatementcertifyingwhetherthecurrentoperationandmanagementmanualandspillcontingencyplan,reflectthewastewatertreatmentfacilityascurrentlyconstructedandoperated,andthedateswhenthesedocumentswerelastreviewedandlastrevisedforadequacy.

g. SourceControlActivityReporting.ThePermitteeshallsubmit,aspartofitsannualreporttotheRegionalWaterBoard,adescriptionofthePermittee’ssourcecontrolactivities,asrequiredbyProvisionVI.C.5.b.ofthisOrder.

i. Acopyofthesourcecontrolstandards;

ii. Adescriptionofthewastehaulerpermitsystem;

iii. Asummaryofthecomplianceandenforcementactivitiesduringthepastyear.ThesummaryshallincludethenamesandaddressesofanyindustrialorcommercialusersundersurveillancebythePermittee,anexplanationofwhethertheywereinspected,sampled,orboth,thefrequencyoftheseactivitiesateachuser,andtheconclusionsorresultsfromtheinspectionorsamplingofeachuser.

iv. Asummaryofanyindustrialwastesurveyresults;and

v. Asummaryofpublicparticipationactivitiestoinvolveandinformthepublic.

h. BiosolidsHandlingandDisposalActivityReporting.ThePermitteeshallsubmit,aspartofitsannualreporttotheRegionalWaterBoard,adescriptionofthePermittee’ssolidshandling,disposalandreuseactivitiesovertheprevioustwelvemonths.IfbiosolidsarenotgeneratedattheFacilityduringtheyear,thereportshallstate,“Nobiosolidsgeneratedthisyear.”IfbiosolidsaregeneratedattheFacilityduringtheyear,thereportshallcontainataminimum:

i. Annualsludgeproduction,indrytonsandpercentsolids

ii. Aschematicdiagramshowingsludgehandlingfacilities(e.g.,digesters,thickeners,dryingbeds,etc.),ifanyandasolidsflowdiagram.

iii. Methodsoffinaldisposalofsludge:

(a) Foranyportionofsludgedischargedtoasanitarylandfill,thePermitteeshallprovidethevolumeofsludgetransportedtothelandfill,thenamesandlocationsofthefacilitiesreceivingsludge,theRegionalWaterBoard’sWDRsordernumberfortheregulatedlandfill,andthelandfillclassification.

(b) Foranyportionofsludgedischargedthroughlandapplication,thePermitteeshallprovidethevolumeofbiosolidsapplied,thedateandlocationswherebiosolidswereapplied,theRegionalWaterBoard’sWDRsordernumberfortheregulateddischarge,ademonstrationthatthedischargewasconductedincompliancewithapplicablepermitsandregulations,and,ifapplicable,correctiveactionstakenorplannedtobringthedischargeintocompliancewithWDRs.

(c) Foranyportionofsludgefurthertreatedthroughcomposting,thePermitteeshallprovideasummaryofthecompostingprocess,thevolumeofsludgecomposted,andademonstrationandsignedcertificationstatementthatthecompostingprocessandfinalproductmetallrequirementsforClassAbiosolids.

i. StormWaterReporting.ThePermitteeshallsubmit,aspartofitsannualreporttotheRegionalWaterBoard,anevaluationoftheeffectivenessofthePermittee’sbestmanagementpractices(BMPs)tocontrolstormwater,aswellasactivitiestomaintainandupgradetheseBMPs.

E. SpillsandOverflowsNotification

1. Allspills,unauthorizeddischarges,andsanitaryseweroverflows(SSOs)equaltoorinexcessof1,000gallonsoranysizespillorSSOthatresultinadischargetoadrainagechannelorasurfacewater:

a. Assoonaspossible,butnotlaterthantwo(2)hoursafterbecomingawareofthedischarge,thePermitteeshallnotifytheCaliforniaEmergencyManagementAgency(CalEMA)1,thelocalhealthofficerordirectorsofenvironmentalhealthwithjurisdictionoveraffectedwaterbodiesorlandareas,andtheRegionalWaterBoard.

InformationtobeprovidedverballytotheRegionalWaterBoardincludes:

i. Nameandcontactinformationofcaller;ii. Date,timeandlocationofspilloccurrence;iii. Estimatesofspillvolume,rateofflow,andspillduration;iv. Surfacewaterbodiesimpacted,ifany;v. Causeofspill;vi. Cleanupactionstakenorrepairsmade;andvii. Respondingagencies.

b. Assoonaspossible,butnotlaterthantwenty‐four(24)hoursafterbecomingawareofadischarge,thePermitteeshallsubmittotheRegionalWaterBoardacertificationthatCalEMAandthelocalhealthofficerordirectorsofenvironmentalhealthwithjurisdictionoveraffectedwaterbodiesorlandareashavebeennotifiedofthedischarge.Forthepurposeofthisrequirement,“certification”meansaCalEMAcertificationnumberand,forthelocalhealthdepartment,nameoflocalhealthstaff,departmentname,phonenumberanddateandtimecontacted.

c. Withinfive(5)businessdays,thePermitteeshallsubmitawrittenreporttotheRegionalWaterBoardoffice.Thereportmustincludeallavailabledetailsrelatedtothecauseofthespillandcorrectiveactiontakenorplannedtobetaken,aswellascopiesofreportssubmittedtootheragencies.

i. Informationprovidedintheverbalnotification;ii. Otheragenciesnotifiedbytelephone;iii. Detaileddescriptionofcleanupactionsandrepairstaken;and

1 ThecontactnumberforspillreportingfortheCalEMAis(800)852‐7550.ThecontactnumberoftheRegionalWaterBoardduringnormalbusinesshoursis(707)576‐2220.

Afternormalbusinesshours,spillreportingtoCalEMAwillsatisfythe2hournotificationrequirementfortheRegionalWaterBoard.

iv. Descriptionofactionsthatwillbetakentominimizeorpreventfuturespills.

d. Inthecoverletterofthemonthlymonitoringreport,thePermitteeshallincludeabriefwrittensummaryoftheeventandanyadditionaldetailsrelatedtothecauseorresolutionoftheevent,including,butnotlimitedtoresultsofanywaterqualitymonitoringconducted.

2. Allspills,unauthorizeddischarges,andsanitaryseweroverflows(SSOs)lessthan1,000gallonsthatdonotreachadrainagechannelorasurfacewater:

a. Assoonaspossible,butnotlaterthantwenty‐four(24)hoursafterbecomingawareofthedischarge,thePermitteeshallnotifytheRegionalWaterBoardandprovidetheapplicableinformationinrequirement1.aofthissection.

b. Inthecoverletterofthemonthlymonitoringreport,thePermitteeshallincludeawrittendescriptionofthespillevent.

AttachmentF–FactSheet F‐1

ATTACHMENTF–FACTSHEET

TableofContents

I. PermitInformation.............................................................................................................................................…F‐3II. FacilityDescription.............................................................................................................................................…F‐5III. ApplicablePlans,Policies,AndRegulations.............................................................................................F‐15IV. RationaleForEffluentLimitationsAndDischargeSpecifications..................................................F‐22

A. DischargeProhibitions F-22 B. Technology‐BasedEffluentLimitations F-25 C. WaterQuality‐BasedEffluentLimitations(WQBELs) F-28 D. FinalEffluentLimitations F-52 E. InterimEffluentLimitations F-58 F. LandDischargeSpecifications F-58 G. ReclamationSpecifications F-59 H. OtherRequirements F-63

V. RationaleForReceivingWaterLimitations.............................................................................................F‐63A. SurfaceWater F-63 B. Groundwater F-64

VI. RationaleForMonitoringAndReportingRequirements...................................................................F‐64A. InfluentMonitoring F-64 B. EffluentMonitoring F-64 C. WholeEffluentToxicityTestingRequirements F-65 D. LandDischargeMonitoringRequirements F-65 E. Irrigation/ReclamationMonitoringRequirements F-66 F. ReceivingWaterMonitoring F-67 G. OtherMonitoringRequirements F-67

VII. RationaleForProvisions..................................................................................................................................F‐67A. StandardProvisions F-67 B. SpecialProvisions F-68

VIII. PublicParticipation............................................................................................................................................F‐73A. NotificationofInterestedParties F-74 B. WrittenComments F-74 C. PublicHearing F-74 D. WasteDischargeRequirementsPetitions F-75 E. InformationandCopying F-75 F. RegisterofInterestedPersons F-75 G. AdditionalInformation F-76

ListofTablesTableF‐1. .... FacilityInformation ..................................................................................................... ..F-3 TableF‐2. .... HistoricEffluentLimitationsandMonitoringData–DischargePoint001 ............. ..F-8 TableF‐3. .... HistoricEffluentLimitationsandMonitoringData–DischargePoint001 ............. F-9 TableF‐4. .... BasinPlanBeneficialUses ........................................................................................... F-16 TableF‐5....USEPAAcute(30‐dayaverage)CriteriaforAmmonia .............................................. F-33 TableF‐6....USEPAChronic(1‐houraverage)CriteriaforAmmonia .......................................... F-34 TableF‐7....DeterminationofLongTermAveragesforAmmonia ............................................... F-36 TableF‐8....DeterminationofFinalWQBELsBasedonAquaticLifeCriteriaforAmmonia ...... F-36 TableF‐9. .... SummaryofReasonablePotentialAnalysisResults ................................................. F-42 TableF‐10. . DeterminationofLongTermAverages ...................................................................... F-47 TableF‐11. . DeterminationofFinalWQBELsBasedonAquaticLifeCriteria.............................. F-47 TableF‐12. . DeterminationFinalWQBELsBasedonHumanHealthCriteria ............................. F-48 TableF‐13. . SummaryofFinalEffluentLimitations–DischargePoint001 ................................ F-56 TableF‐14. . SummaryofFinalEffluentLimitations–DischargePoint002 ................................ F-58 TableF‐15. . SummaryofFinalEffluentLimitations–DischargePoint003 ................................ F-58 TableF‐16. . SummaryofReclamationSpecifications .................................................................... F-62 ATTACHMENTF‐1RPASummary .................................................................................................. ..F-1

ATTACHMENTF–FACTSHEET

AsdescribedinsectionII.BoftheOrder,theRegionalWaterBoardincorporatesthisFactSheetasfindingsoftheRegionalWaterBoardsupportingtheissuanceofthisOrder.ThisFactSheetincludesthelegalrequirementsandtechnicalrationalethatserveasthebasisfortherequirementsofthisOrder.

ThisOrderhasbeenpreparedunderastandardizedformattoaccommodateabroadrangeofdischargerequirementsfordischargersinCalifornia.OnlythosesectionsorsubsectionsofthisOrderthatarespecificallyidentifiedas“notapplicable”havebeendeterminednottoapplytothisPermittee.SectionsorsubsectionsofthisOrdernotspecificallyidentifiedas“notapplicable”arefullyapplicabletothisPermittee.

I. PERMITINFORMATION

ThefollowingtablesummarizesadministrativeinformationrelatedtotheOccidentalCountySanitationDistrictWastewaterTreatmentFacility.

TableF‐1. FacilityInformation

WDID 1B830100OSON

Permittee OccidentalCountySanitationDistrict(Owner)andSonomaCountyWaterAgency(Operator)

NameofFacilityOccidentalCountySanitationDistrictWastewaterTreatmentFacility(WWTF)

FacilityAddress14445OccidentalRoadOccidental,CA95465SonomaCounty

FacilityContact,TitleandPhone WendyGjestland,WaterAgencyEngineer,(707)521‐1866

AuthorizedPersontoSignandSubmitReports

HodyWilson,OperationsManager,(707)521‐1843

MailingAddress P.O.Box11628,SantaRosa,CA95406BillingAddress SameasmailingaddressTypeofFacility PubliclyOwnedTreatmentWorks(POTW)MajororMinorFacility MinorThreattoWaterQuality 1Complexity BPretreatmentProgram NoReclamationRequirements ProducerFacilityDesignandPermittedFlow

0.05mgd(averageannualdryweathertreatmentcapacity)1

Watershed RussianRiverHydrologicUnit,GuernevilleHydrologicSubarea

A. TheOccidentalCountySanitationDistrict(OCSD)ownstheOccidentalCountySanitationDistrictWastewaterTreatmentFacility(hereinafterFacility),apubliclyownedtreatmentworks(POTW),asshownonAttachmentB.TheSonomaCountyWaterAgency(SCWA)isundercontracttooperateandmaintaintheFacility.TheOCSDandSCWAarecollectivelyreferredtoasthePermittee.ForthepurposesofthisOrder,referencestothe“discharger”or“permittee”inapplicablefederalandstatelaws,regulations,plans,orpolicyareheldtobeequivalenttoreferencestothePermitteeherein.

B. TheFacilitydischargessecondarytreated,disinfected,dechlorinatedwastewatertoGraham’sPondwhichistributarytoDutchBillCreek,thencetheRussianRiver,allwatersoftheUnitedStates.TheFacilityiscurrentlyregulatedbyOrderNo.93‐42whichwasadoptedonMay27,1993,andexpiredonMay26,1998.ThePermitteeisalsoregulatedbyMonitoringandReportingProgram(MRP)No.93‐42,whichwasoriginallyadoptedonMay27,1993,andrevisedbytheRegionalBoardExecutiveOfficeronSeptember15,2008,andApril23,2009,toincreasemonitoringrequirements.

C. ThetermsandconditionsofOrderNo.93‐42andtheMRP(asrevisedonApril23,2009)havebeenautomaticallycontinuedandremainineffectuntilnewWasteDischargeRequirements(WDRs)andNationalPollutantDischargeEliminationSystem(NPDES)permitareadoptedpursuanttothisOrder.Duringthisperiodofcontinuation,theRegionalWaterBoardandstaffhaveworkedwiththePermitteetoidentifysolutionstoviolationsofWDRsandtheBasinPlan,asfurtherdescribedinsectionsII.D(ComplianceSummary)andII.E(PlannedChanges)ofthisFactSheet.

D. ThePermitteefiledaReportofWasteDischarge(ROWD)andsubmittedanapplicationforrenewalofitsWDRsandNPDESpermitonJanuary14,2009.SupplementalinformationwasrequestedbyRegionalWaterBoardstaffbyletterdatedDecember1,2010andemaildatedJuly30,2012.SupplementalprioritypollutantdatausedinthefinalreasonablepotentialanalysiswassubmittedbythePermitteeinitsmonthlyself‐monitoringreportsfromDecember2010throughJune2012.Aninfeasibilityanalysisforcopper,lead,silver,dichlorobromomethane(DCBM),chlorodibromomethane(CDBM),bis(2‐ethylhexyl)phthalate,andammoniawassubmittedonSeptember10,2012.TheROWDwasdeemedcompleteonSeptember11,2012.

ReceivingWater DutchBillCreek,tributarytotheRussianRiver

ReceivingWaterType InlandSurfaceWater

TableNotes:

1.Theaverageannualdry‐weatherflowshallbethearithmeticmeanoftheinfluentflowforthefourconsecutivelowestflowmonthsinacalendaryear.

II. FACILITYDESCRIPTION

TheFacilityprovidessewerageservicetoapopulationofapproximately650,includingresidentialandcommercialcustomers(includingadentist)inthetownofOccidental.Thereisalsooneindustrialuser,asmallslaughterhousethatispermittedtodischargeupto1,000gpdofwashwaterintotheFacility,butnoanimalwasteisdischarged.ThePermittee’swastewatermakeupisapproximately52percentresidentialflow,43percentcommercialflow,and5percentindustrialflow.

A. DescriptionofWastewaterandBiosolidsTreatmentorControls

1. CollectionSystem

ThePermittee’scollectionsystemwasoriginallyconstructedinthe1950s.Thetotallengthofthecollectionsystemis12,670feet(8,428feetofgravitypipe,3,200feetofforcemain,and1,042feetofprivatelaterals).Thegravitysewerpipelineflowstoaliftstationfromwhichsewageispumpedapproximately250feetinelevationtothetreatmentplantthrough3200feetof4‐inchforcemain.In2007,thePermitteereplaceda3,820feetofthegravityportionsofthecollectionsystemwhichresultedinasignificantreductioninwetweatherflowtotheFacility.Thisamountsto30percentoftheentirecollectionsystem,40percentoftheunpressurizedportion(District‐ownedgravityplusprivatelaterals)and45percentoftheDistrict‐ownedgravityportionofthecollectionsystem.

ThePermitteehasacollectionsystemmaintenanceprogramthatisdesignedtoreducethelikelihoodofsanitaryseweroverflows(SSOs).Activitiesincluderoddingandhydrocleaningsewermainlinestokeepthelinesclear;videoinspectionsofsewermainlinestoassesstheconditionofthepipeline;locationandmarkingofsewermainlinespriortoconstructionprojectstopreventdamagetopipingandpossibleaccidentaldischargeofrawsewage;repairingmanholes,mainlines,andlaterals;liftstationmaintenance;infiltrationandinflow(I&I)investigation;andrespondingtoreportedsewerstoppagesorsanitaryseweroverflows.

ThePermittee’ssourcecontroleffortsprimarilyfocusonrestaurants.Greasetraps/interceptorsareinspectedaminimumofannually.Ifproblemsareencountered,therestaurantownerisnotifiedinwritingandinstructedtocleanthetraporinterceptorwithinaspecifiedtimeframe.

2. WastewaterTreatment

TheFacilityisdesignedtoprovidesecondarytreatmentforuptoanaveragedailydryweatherflowof0.05mgd.Thedischargepumpsaredesignedtohandleapeakwetweatherflowof175gallonsperminutewhichisequivalentto0.252mgdifthe

Facilitydischargedatpeakflowforacontinuous24hourperiod.Thecurrenttreatmentsystemconsistsofaheadworks,oneaerationpond,onesettlingpond,chlorination,dechlorination,andpHadjustment.

Theheadworksislocatedattheliftstationandconsistsofagritchamber,wetwell,andwetwelloverflowstoragetank.Theaeratedpondhasanestimatedcapacityof0.65milliongallons(withtwofeetoffreeboard)andisequippedwithtwofloatingmechanicalaeratorsaswellasabafflesystemtoreduceshort‐circuiting.Thesettlingpondhasaworkingcapacityof0.22milliongallonsandhasanaveragedepthof4feetandsurfaceareaof8,400squarefeet.ThePermitteeremovedapproximately30drytonsofsludgein2007toensurethatthepondhasadequatecapacity.Chlorinedisinfectionisaccomplishedinthreeenclosedtankswithatotalstoragevolumeof13,500gallonsthatareplumbedinseriesandparalleltoprovideoperationalflexibility.Thecontacttanksareoperatedinseriesundernormaloperatingconditions.Gaseouschlorineiscurrentlyusedfordisinfectionatadosageofapproximately24partspermillion(ppm).Chlorinatedeffluentisdechlorinatedusingsodiumbisulfiteatanaveragedosageof24ppmina3,000gallontank,thenpHadjustedusing25percentcausticsodaatadosageof4ppm.

3. EffluentStorage

Secondarytreated,disinfected,dechlorinatedwastewaterisdischargedtoGraham’sPond,a10milliongallonstoragereservoirthatoverflowstoDutchBillCreek,atributaryoftheRussianRiver.ThePermitteehasutilizedGraham’sPondasayear‐roundstoragereservoirsinceapproximately1977.However,RegionalWaterBoardanalysishasdeterminedthatGraham’sPondisawateroftheUnitedStatesduetoitsconstructionandlocationwithinanexistingheadwatersdrainagesystem.Graham’sPondisanin‐streampondthatwasconstructedattheheadwatersofDutchBillCreek,originallyforuseasanagriculturalpond.Graham’sPondreceivesrunofffromupstreamslopesandseveralsmalldrainagesintothepond.

Beginningin1977,Occidental’swastedischargerequirements(OrderNo.77‐153)alloweddischargesoftreated,disinfectedeffluenttoGraham’sPondduringtheperiodswhentherewasnodischargefromGraham’sPondtoDutchBillCreekforsubsequentirrigationuseontheadjacentpastureland.OrderNo.83‐001allowedyear‐rounddischargestoGraham’sPondwithwet‐weatherdischargestoDutchBillCreekat100:1dilutionratemeasuredatthereservoiroverflow.OrderNo.88‐20allowedthe100:1dilutionratetobemeasuredatCampMeeker.

4. RecycledWater/LandDisposal

Duringthedryweatherseason(May15toSeptember30),andotherperiodsasallowedunderthisOrder,thePermitteeirrigatesan8.26acrecattlepasturewith

effluentstoredinGraham’sPond.ThepastureandGraham’sPondareownedbytheLoadesfamilyandthepastureislocatedadjacenttoandimmediatelydowngradientfromGraham’sPond.Theirrigationsystemiscontrolledbythepropertyownerusingamanuallycontrolledsprinklersystemthathasfourindependentlycontrolledlines.Undernormaloperations,onelineisoperatedatatimeonarotationalbasisinordertoavoidtheoccurrenceofrunoffandtomaximizetheefficiencyofthesystem.Inaddition,SCWAoperationsstaffinspectsthepropertyaminimumoftwotimesperweekinordertopreventrunofffromoccurring.Duringtheirrigationseason,thesystemisused2to3daysperweekforamaximumofeighthoursperday.Theaverageapplicationrateis400gpm.

5. Biosolids

Biosolidsgeneratedduringthetreatmentprocessaccumulateintheaerationandsettlingponds,wheretheyundergoanaerobicdigestionandcompaction.Overtime,thevolumeofsettledsolidsincreases,reducingtheretentiontimeofflowthroughtheponds.Asnecessary,biosolidsareremovedanddisposedatalegalpointofdisposal.Thelastsludgeremovaloccurredin2007.

B. DischargePointsandReceivingWaters

1. TheFacility’spointofdischargetoGraham’sPond(DischargePoint001)islocatedwithintheGuernevilleHydrologicSubareaoftheLowerRussianRiverHydrologicAreaandtheRussianRiverHydrologicUnitat38°24’46”Nlatitudeand122°56’31”Wlongitude.ThePermitteecurrentlydischargesyear‐roundtoGraham’sPond.

2. DuringtheperiodofOctober1throughMay14,thePermitteeintermittentlydischargescomingledeffluentandstormwaterfromGraham’sPondtoDutchBillCreek(DischargePoint002)atonepercentoftheflowofDutchBillCreekasmeasuredattheCampMeekerbridge.DischargestypicallyoccurbetweenthemonthsofNovemberandMay.Duringperiodsofsustainedwetweatherflows,itisdifficultforthePermitteetocontroldischargesfromGraham’sPondduetotheinfluxofstormwaterfromthesurroundinghillsidesandthetwosmallstreamsthatflowintoGraham’sPond.WhenstormwaterflowstoGraham’sPondcauseittofillataratethatexceedsthecapacityofthemetereddischargepipe,comingledeffluentandstormwaterdischargeoveranunmeteredspillwaytoDutchBillCreek.

C. SummaryofExistingRequirementsandSelf‐MonitoringReport(SMR)Data

1. EffluentlimitationscontainedinOrderNo.93‐42fordischargesfromDischargePoint001(MonitoringLocationEFF‐001)andrepresentativemonitoringdatafromthetermofOrderNo.93‐42aresummarizedinthefollowingtwotables.

TableF‐2. HistoricEffluentLimitationsandMonitoringData–DischargePoint001

Parameter Units

EffluentLimitationsMonitoringData(January2000–December2006)

AverageMonthly1

AverageWeekly2

MaximumDaily3

HighestReportedValue4

NumberofViolations

mg/L 30 45 60 67 25

lbs/day(dry‐weather)5

12 18 24 57.5 42

%Removal 65 ‐‐ ‐‐ (>65)6 0

TotalSuspendedSolids

mg/L 50 65 80 73 4

20 27 33 63 41

%Removal Norequirement ‐‐‐ ‐‐‐SettleableSolids

ml/L 0.1 ‐‐ 0.2 0.1 0

TotalColiformOrganisms

MPN/100mL 2.2 ‐‐‐ 23 1600 15

ChlorineResidual

mg/L ‐‐‐ ‐‐‐ 0.1 16.8 10

pH standardunits ‐‐ ‐‐6.5–8.5

(6.4)–10

FishBioassay %survival (0) 3Flow(Influent)

mgd 0.05 ‐‐ ‐‐ 7 0

TableNotes:

1. Thearithmeticmeanofallsamplescollectedinacalendarmonth.2. Thearithmeticmeanofallsamplescollectedinacalendarweek,SundaytoSaturday.3. Themaximumresultofallsamplescollectedinacalendarday.4. Someparameters,suchaspHandfishbioassayhavelowerlimitsthatareevaluatedforcompliance.Parameters

forwhichalowerlimitmustbeevaluatedareindicatedinparentheses.5. Mass‐basedeffluentlimitationsarebasedonthewastewatertreatmentfacilityaveragedry‐weatherdesignflow

of0.05mgd.6. Monitoringdatawasnotreviewedtodeterminehighest(orlowest)reportedvalueduetothefactthattherewere

noviolations..7. ThePermitteehasnotexceededtheADWFlimitof0.05mgd.

TableF‐3. HistoricEffluentLimitationsandMonitoringData–DischargePoint001

Parameter Units

EffluentLimitationsMonitoringData

(January2007–June2012)

AverageMonthly1

AverageWeekly2

MaximumDaily3

HighestReportedValue4

NumberofViolations

mg/L 30 45 60 71 10

12 18 24 33.4 4

%Removal 65 ‐‐ ‐‐ (99) 0

mg/L 50 65 80 186 6

20 27 33 52 5

%Removal Norequirement ‐‐‐ ‐‐‐SettleableSolids

ml/L 0.1 ‐‐ 0.2 1.5 2

TotalColiformOrganisms

MPN/100mL 2.2 ‐‐‐ 23130

ChlorineResidual

mg/L ‐‐‐ ‐‐‐ 0.1 10.7 5

pH standardunits ‐‐ ‐‐ 6.5–8.5 8 1FishBioassay %survival (0) 17Flow(Influent)

mgd 0.05 ‐‐ ‐‐ 6 0

TableNotes:

1. Thearithmeticmeanofallsamplescollectedinacalendarmonth.2. Thearithmeticmeanofallsamplescollectedinacalendarweek,SundaytoSaturday.3. Themaximumresultofallsamplescollectedinacalendarday.4. Someparameters,suchaspHandfishbioassayhavelowerlimitsthatareevaluatedforcompliance.Parameters

forwhichalowerlimitmustbeevaluatedareindicatedinparentheses.5. Mass‐basedeffluentlimitationsarebasedonthewastewatertreatmentfacilityaveragedry‐weatherdesignflow

of0.05mgd.6. ThePermitteehasnotexceededtheADWFlimitof0.05mgd.

D. ComplianceSummary

1. ViolationsSummary

Duetothelonghistoryofviolationsandthelengthoftimebetweenpermitrenewals,themonitoringdataissummarizedintwotables,onefortheperiodof2000through

2006andtheotherforthetimeperiodof2007throughJune2012.ThisdivisionoftimewasselectedbecausethePermitteemadeimprovementstotheFacilityovertimethatresultedinagradualreductioninviolations.Thenumberofeffluentlimitationviolationsintheearlytimeperiodtotaled143incomparisonto62duringthelattertimeperiod.

a. Violationsofeffluentlimitations.DuringthetermofthepreviousOrder,thePermitteeexperiencedviolationsofbiochemicaloxygendemand(BOD5),totalsuspendedsolids,settleablesolids,chlorineresidual,pH,totalcoliformandacutetoxicityeffluentlimitations.Non‐effluentviolationsincludedseveralsanitaryseweroverflows,spillsrelatedtoaleakintheeffluentsettlingpond,effluentdischargestoreceivingwateratgreaterthan1%ofthestreamflow,andseveralmissingdataviolations.AfterthePermitteecompleteditscollectionsystemreplacementprojectin2007,thenumberofdischargerateviolationsdecreasedfrom18to11,unauthorizeddischargesdecreasedfrom16to4,andsanitaryseweroverflowsdecreasedfrom5to1.ThePermittee’sreportingpracticesalsoimprovedwiththenumberofmissingdataviolationsdecreasingfrom14to3.

EffluentlimitationviolationsareassessedatthepointofdischargetoGraham’sPondbecauseGraham’sPondhasbeenidentifiedasawateroftheUS.Numerousacutetoxicityviolationshavenotbeeninvestigatedwellandmayberelatedtohighammoniaintheeffluentdischarge.TheOrderincludesfinaleffluentlimitationsforammonia,aswellasupdatedacuteandchronictoxicityrequirementsandrequirementstoinvestigateevidenceoftoxicitywithatoxicityreductionevaluation.

ViolationsofBOD5,TSS,settleablesolids,coliformandpHhavedecreasedsincecompletionofthecollectionsystemreplacementprojectin2007.Theseviolationshavebeenintermittentandsometimesepisodic(aclusterofviolationsoverashortperiodoftime),butthereasonfortheviolationsisnottypicallyevidentoridentifiable.

b. OtherViolations

ThePermitteehasreportedoccasionalleaksfromthesettlingpond.Theleaksaretheresultofponddeteriorationovertime.ThePermitteehasestablishedanoperatingprotocolofreducingthelevelofwaterinthepond.Theleaksoccurwhenthewaterlevelisraisedaboveaspecificlevel.

2. EnforcementActionSummary

Since1997,severalenforcementactionshavebeentakenagainstthePermittee,includingfiveceaseanddesistorders,twoadministrativecivilliabilitycomplaints,

andtwoadministrativecivilliabilityorders.Thelastenforcementactionoccurredin2007.Violationsthathaveoccurredbetween2007and2012willbethesubjectofafutureenforcementaction.

EnforcementactionstakenagainstthePermittee,relatedtoviolationsofwastedischargeandNPDESrequirements,aresummarizedbelow.

a. CeaseandDesistOrderNo.97‐74.OnAugust27,1997,theRegionalWaterBoardadoptedCDONo.97‐74requiringthePermitteetoceaseanddesistfromthreateningtodischargeinviolationofWDROrderNo.93‐42andTimeScheduleOrderNo.97‐75prescribinganadministrativecivilliabilitypenaltyscheduleuponthePermittee’sfailuretocomplywithtaskspertainingtodevelopmentandconstructionofacapitalimprovementproject(CIP)tocorrectviolationsfromtheexistingfailingWWTF.TheRegionalWaterBoardfoundthatthePermitteeviolatedWDRsOrderNo.93‐42by(1)dischargingtreated,disinfectedeffluenttoDutchBillCreekfromGraham’sPondduringthesummerdischargeprohibitionperiod;and(2)dischargingtreatedeffluentwithpHandchlorineresidualviolationstoGraham’sPond.TheRegionalWaterBoardalsofoundthattheseviolationsoccurredandmaycontinuetooccurduetoalackofadequatestoragecapacityand/orinadequateoperationoftreatmentandstoragefacilitiesattheWWTF.CDONo.97‐74containedatimescheduleofshort‐andlong‐termactionsforthePermitteetocomplete.Theshort‐termactionswerecompletedinatimelymanner.Someofthelong‐termactionshavebeencompletedandothers,suchascompletionofaCIPtoachievecompliancewithallBasinPlanrequirements,wereextendedinsubsequentCDOs.

b. AdministrativeCivilLiability(ACL)OrderNo.97‐126.OnOctober23,1997,theRegionalWaterBoardadoptedACLOrderNo.97‐126imposingacivilliabilityof$125,000againstthePermitteeforviolationsofWDROrderNo.93‐42andprohibitionscontainedintheWaterQualityControlPlanfortheNorthCoastRegion.ThePermitteewaiveditsrighttoapublichearingandproposedtosettlethiscomplaintbypaying:(1)$25,000intotheCleanupandAbatementAccount;(2)$50,000ifCEQAdocumentswerenotcertifiedbyJanuary1,2000;and(3)$50,000iftheCIPwasnotconstructedbySeptember1,2002.ThePermitteemetthefirstandsecondsettlementrequirements.AlthoughthedeadlineforCIPconstructionwasextendedinsubsequentCDOs,aCIPhasnotbeencompletedandthe$50,000identifiedinthethirdsettlementrequirementisstilloutstanding.

c. CDONo.R1‐2001‐47.OnJanuary25,2001,andMarch2,2001,theSCWAsubmittedletterstotheRegionalWaterBoardExecutiveOfficerdescribingthePermittee’splanforselectingandconstructingafinalWWTFupgradeprojectandrequestinganextensionoftimetocompleteTasksHandIinCDONo.97‐74

pertainingtoawardingabidforandcompletingconstructionoftheselectedCIP.TheMarch2,2001letterrequestedanextensionofoneyearandninemonthstoawardthebidfortheselectedprojectandstatedthattheycouldnotcommittoadateforcompletionofconstructionpendingselectionofaCIP.ThetimeextensionswererequestedtoallowforconsiderationofacombinedOccidental/CampMeekerwastewaterprojectproposedbytheCampMeekerParksandRecreationDistrictasanadditionalupgradealternative.

OnMay24,2001,theRegionalWaterBoardconsideredthePermittee’sextensionrequestsandadopted:(1)CDOOrderNo.R1‐2001‐47thatextendedtheremainingdeadlinesinCDONo.97‐74,subjecttocompletionofaninterimprojecttoreducethepotentialforon‐goingeffluentlimitationviolationsandaprohibitiononadditionaldischarges;and(2)TimeScheduleOrder(TSO)No.R1‐2001‐48prescribinganadministrativecivilliabilitypenaltyscheduleuponthePermittee’sfailuretocomplywithtasksthereinpertainingtodevelopmentandconstructionoftheselectedCIP.

CertificationofanEIR:AnEIRfortheOccidental/CampMeekerprojectwascertifiedbytheCampMeekerRecreationandParksDistrictonMarch12,2002.TheEIRidentifiedapreferredCIPthatconsistedofacombinedOccidental/CampMeekerwastewatercollection,treatment,disposal,andreclamationupgradeproject.TheidentifiedprojectconsistedofacollectionsystemandliftstationinCampMeeker,aforcemainfromCampMeekertoOccidental,replacementoftheexistingcollectionsysteminOccidental,modificationoftheexistingliftstationinOccidental,upgradeoftheexistingOccidentalWWTFtoincludetertiarytreatmentcapabilities,anew2‐milliongallonrecycledwaterstoragepond,abandonmentoftheuseofGraham’sPond,constructionofwoodlandsandwetlanddisposal,wet‐weathersurfacewaterdischargetoDutchBillCreekatanaveragerateof2.2percentoftheflowofDutchBillCreek,anddry‐weatherirrigationonthesameparcelcurrentlybeingusedfordry‐weatherirrigation.TheBoardofDirectorsfortheOCSDapprovedthepreferredprojectonMarch26,2002.

CompletedInterimProject:InJune2002,thePermitteecompletedtheinterimprojectrequiredbyCDONo.R1‐2001‐47(dredgingsludgefromthesettlingpond)thatwastoimproveWWTFreliability.ThePermitteecontinuedtoreporteffluentlimitationviolationsinmonthlyself‐monitoringreportsafterthecompletionoftheinterimproject.

d. CDONo.R1‐2003‐0020.InawrittenprogressreportdatedMay31,2002,theSCWAstatedthattheOCSDandSCWAwouldnotbeabletomeettwocompliancedatesinCDONo.R1‐2001‐47:theDecember1,2002,dateforawardingabidfortheCIPandtheDecember1,2003,dateforcompletionoftheCIP.TheSCWA

requestedaone‐yeartimeextensiontoawardabidfortheCIPanda27‐monthtimeextensiontocompleteconstructionoftheCIP.TheprogressreportstatedthatprogresstowarddesignandconstructionoftheproposedfacilitywasmovingaheadslowlyduetofinancialconstraintsandthatthePermitteewouldcontinuetoseekgrantstofundtheproposedproject.TheprogressreportstatedthattheextensionwouldallowthePermitteeandCampMeekertocontinuetheireffortstoobtainfundingfortheCIPbutdidnotprovideadefinitiveplanforobtainingthefunding.

FinancialPlan:InaletterdatedOctober31,2002,theRegionalWaterBoardExecutiveOfficerrequiredthatthePermitteesubmitafinancialplandocumentingthatfundingwasavailableforcompletionofthepreferredCIP.OnDecember18,2002,andJanuary8,2003,theSCWAsubmitteddraftsofawrittenreporttitled“FinancialPlan,Long‐TermCapitalImprovementProject”(CIPReport)withatimescheduleandfinancialplanforcompletionoftheCIP.TheCIPReportdescribedaphasedapproachtoconstructingtheCIPthatinvolvedseparatingtheprojectintoprioritizedstand‐alonephasesthatcouldbeconstructedasgrantfundingwasobtained.TheCIPReportidentifiedfundingsourcesthatwerebeingappliedforinordertopayforcompletionoftheCIP.

OnMarch27,2003,theRegionalWaterBoardadopted(1)CDONo.R1‐2003‐0020thatextendedtheremainingdeadlinesinCDONo.R1‐2001‐47inaccordancewiththePermittee’sFinancialPlanReport,subjecttocompletionofanadditionalinterimprojecttoreducethepotentialforon‐goingeffluentlimitationviolationsandaprohibitiononadditionaldischarges,and(2)TimeScheduleOrderNo.R1‐2003‐0021prescribinganadministrativecivilliabilitypenaltyscheduleuponthePermittee’sfailuretocomplywithtasksthereinpertainingtodevelopmentandconstructionoftheselectedCIP.

e. ACLCNo.R1‐2003‐0125.OnNovember3,2003,theExecutiveOfficerissuedACLCNo.R1‐2003‐0125assessingmandatorypenaltiesforviolationsofeffluentlimitationsduringthedischargeseason.Thecomplaintidentified83seriousandchronicviolationsandproposedapenaltyof$216,000.Thecomplaintrequiredthat$26,000bepaidtotheStateCleanupandAbatementAccount(CAA)andallowedforsuspensionof$90,000forcompletionofaninterimprojectbyApril30,2004,andanother$100,000forcompletionoftreatmentplantupgrades,includinginstallationoftertiaryfilters,byJune30,2008.

f. CDONo.R1‐2004‐0102.OnNovember29,2004,theRegionalWaterBoardadoptedCDONo.R1‐2004‐0102andTimeScheduleOrderNo.2004‐0103,extendingthecompliancedatefromDecember31,2004toOctober1,2005for

awardofbidfortreatmentplantimprovements.ThedateforcompletionoftheCIPdidnotchangeandremainedatJune30,2008.

g. CDONo.R1‐2005‐0085.OnOctober12,2005,theRegionalWaterBoardadoptedCDONo.R1‐2005‐0085andTSONo.R1‐2005‐0086,extendingthetimeforimplementingalongtermCIP.TheCDOtasksincludeddatesforreleaseofadraftCEQAdocumentbyFebruary28,2007,completionofcollectionsystemupgradeprojectbyOctober30,2007,certificationofaCEQAdocumentbyDecember30,2007,completionoffinaldesignoftheCIPbyDecember30,2008,andcompletionofconstructionoftheCIPbyJune30,2010.ThePermitteecompletedandcertifiedtheCEQAdocumentandcompletedthecollectionsystemupgradeproject,buthasnotcompletedthedesignorconstructionoftheCIP.

h. ACLCNo.R1‐2007‐0022.OnMarch5,2007,theRegionalWaterBoardExecutiveOfficerissuedACLCNo.R1‐2007‐0022assessingmandatorypenaltiesforviolationsofeffluentlimitationsduringthedischargeseasonbetweenApril17,2003andOctober31,2006.TheComplaintidentified18seriousand17chronicviolationsandproposedapenaltyof$93,000.TheComplaintrequiredthat$10,000bepaidtotheCAAandallowedforsuspensionof$83,000forcompletionofComplianceProject(CP)totalingatleast$83,000.

i. ACLOR1‐2007‐0054.OnSeptember13,2007,theRegionalBoardadoptedACLOR1‐2007‐0054assessingamandatorypenaltyof$309,000forviolationsaddressedinACLCNos.R1‐2003‐0125andR1‐2007‐0022.ThePermitteehadpreviouslysettledthecomplaintsbypayingthesumof$36,000intotheCAAandconductingComplianceProjects(CP)totalingatleast$273,000.TheCPsinvolvedtheadditionofbafflesintheaeratedtreatmentpondthatwascompletedin2004andacollectionsystemreplacementprojectthatwascompletedin2007.

3. ComplianceProjects.

InresponsetotheCDOsandACLsdescribedinsectionII.D.2,above,severalpotentialCIPswereidentifiedandevaluatedbetween1997and2009,includingasubsurfacedisposalsystem,anAWTupgradetoserveOccidentalandCampMeeker,anAWTupgradetoserveOccidental,andconstructionofapipelinetoconveywastewaterfromOccidentaltotheRussianRiverSanitationDistrictWWTFinGuerneville.Eachoftheseprojectsweresubsequentlydeemedenvironmentallyand/orfinanciallyinfeasibletocomplete.

PursuanttorequirementsinCDONo.2005‐0085,thePermitteecompletedacollectionsystemreplacementprojectin2007thatresultedinareductionoftheamountofinfiltrationandinflowtotheFacility.Sincecompletionofthisproject,

therehasbeenareductioninthenumberofeffluentlimitationanddischargerateviolationsofOrderNo.93‐42.

E. PlannedChanges

OrderNo.R1‐2005‐0085requiredcompletionofaCIPbyJune30,2010.ThePermitteesubmittedafeasibilitystudyandwaterbalancetoRegionalBoardstaffinJuly2008(andamendedinSeptember2008)foraprojecttoeliminatedischargestosurfacewaters.Sincethattime,thePermitteehasbeenevaluatingaprojectthatincludesconstructionofanewstoragepondtoreplaceGraham’sPond,anincreaseinirrigationacreage,andeliminationofdischargestosurfacewaters.Theprojectwouldalsoincorporatewaterconservationmeasures.ThePermitteesubmitsquarterlyprogressreportstotheRegionalBoard.

Althoughprogresshasbeenslow,thePermitteehasidentifiedapotentialstoragepondsiteforwhichithasinitiatednecessarygeotechnicalevaluations,environmentalstudies,andpreliminarydesign.TheproposedprojectwouldincludeincreasingtheirrigationareaoftheLoades’propertyfrom8acrestoapproximately18acres.ThePermitteemustcompleteaCEQAdocumentinthenearfuture.Projectcostsareestimatedtobe$5milliondollars,andafundingsourcefortheprojecthasnotbeenidentified.ACeaseandDesistOrderhasbeendevelopedforadoptionwiththispermitrenewal.TheCDO(OrderNo.R1‐2012‐0102)includesacomplianceschedulerequiringthePermitteetocompletetheCIPandachievecompliancewithallpermitrequirementsbyJanuary31,2018.

III. APPLICABLEPLANS,POLICIES,ANDREGULATIONS

TherequirementscontainedinthisOrderarebasedontherequirementsandauthoritiesdescribedinthissection.Thissectionprovidessupplementalinformation,whereappropriate,fortheplans,policies,andregulationsrelevanttothedischarge.

A. CaliforniaEnvironmentalQualityAct(CEQA)

UnderCaliforniaWaterCode(WaterCode)section13389,thisactiontoadoptanNPDESpermitisexemptfromtheprovisionsofChapter3ofCEQA(commencingwithsection21100)ofdivision13ofthePublicResourcesCode.Accordingly,thisexemptionfromCEQAappliestotheRegionalWaterBoard’sactiontoadoptthoseportionsoftheOrderthatregulateNPDESdischarges.

Thisactionalsoinvolvesthere‐issuanceofwastedischargerequirementsforanexistingfacilitythatdischargestreatedwastewatertolandthroughtheuseofpercolationpondsfordisposal.TheRegionalWaterBoard’sactioninapprovingthosepartsoftheOrderthatregulateWDR‐relateddischargesisalsoexemptfromCEQAasanexistingfacilityfor

whichnoexpansionofdesignflowisbeingpermittedatthetimeoftheleadagency’sdeterminationpursuanttotitle14,CaliforniaCodeofRegulations(CCR),section15301.

B. StateandFederalRegulations,Policies,andPlans

1. WaterQualityControlPlans.TheRegionalWaterQualityControlBoard(RegionalWaterBoard)adoptedaWaterQualityControlPlanfortheNorthCoastRegion(hereinafterBasinPlan)thatdesignatesbeneficialuses,establisheswaterqualityobjectives,andcontainsimplementationprogramsandpoliciestoachievethoseobjectivesforallwatersaddressedthroughtheplan.Inaddition,theBasinPlanimplementsStateWaterResourcesControlBoard(StateWaterBoard)ResolutionNo.88‐63,whichestablishesStatepolicythatallwaters,withcertainexceptions,shouldbeconsideredsuitableorpotentiallysuitableformunicipalordomesticsupply.TheBasinPlan,atpage2‐18.00,establishesbeneficialusesforgroundwaterasmunicipalanddomesticsupply,industrialservicesupply,industrialprocesssupply,agriculturalsupply,andfreshwatersupply.Thus,beneficialusesapplicabletoDutchBillCreekandgroundwaterwithintheGuernevilleHydrologicSubareaoftheRussianRiverHydrologicUnitareasfollows:

TableF‐4. BasinPlanBeneficialUses

DischargePoint

ReceivingWaterName

BeneficialUse(s)

002 DutchBillCreek(anditstributaries),tributarytotheRussianRiverwithintheGuernevilleHydrologicSubareaoftheRussianRiverHydrologicUnit

Existing:Municipalanddomesticwatersupply(MUN)Agriculturalsupply(AGR)Industrialservicesupply(IND)Groundwaterrecharge(GWR)Freshwaterreplenishment(FRESH)Navigation(NAV)Watercontactrecreation(REC‐1)Non‐contactwaterrecreation(REC‐2)CommercialandSportfishing(COMM)Warmfreshwaterhabitat(WARM)Coldfreshwaterhabitat(COLD)Wildlifehabitat(WILD)Preservationofrare,threatenedorendangeredspecies(RARE)Migrationofaquaticorganisms(MIGR)Spawning,reproductionand/orearlydevelopment(SPWN)EstuarineHabitat(EST)Potential:Industrialprocesssupply(PRO)Shellfishharvesting(SHELL)Aquaculture(AQUA)

InadditiontothebeneficialusessetoutintheBasinPlan,thereareseveralimplementationplansthatincludeactionsintendedtomeetwaterqualityobjectivesandprotectbeneficialusesoftheNorthCoastalBasin.FortheRussianRiveranditstributaries,nopointsourcewastedischargesareallowedfromMay15throughSeptember30,andduringallotherperiodswhenthewastedischargeflowisgreaterthanonepercentofthereceivingstream’sflow.FormunicipalwastedischargedfromOctober1throughMay14,thedischargemustbeofadvancedtreatedwastewater,andmustmeetamediancoliformlevelof2.2MostProbableNumber(MPN)per100milliliters(mL).

RequirementsofthisOrderimplementtheBasinPlan.ThePermitteedoesnotcurrentlycomplywiththeBasinPlanwithregardtorequirementsforadvancedwastewatertreatment,theseasonaldischargeprohibitionandthedischargeflowlimitation.

2. NationalToxicsRule(NTR)andCaliforniaToxicsRule(CTR).USEPAadoptedtheNTRonDecember22,1992,andlateramendeditonMay4,1995,andNovember9,1999.AboutfortycriteriaintheNTRappliedinCalifornia.OnMay18,2000,USEPAadoptedtheCTR.TheCTRpromulgatednewtoxicscriteriaforCaliforniaand,inaddition,incorporatedthepreviouslyadoptedNTRcriteriathatwereapplicableinthestate.TheCTRwasamendedonFebruary13,2001.Theserulescontainfederalwaterqualitycriteriaforprioritypollutants.

3. StateImplementationPolicy.OnMarch2,2000,theStateWaterBoardadoptedthePolicyforImplementationofToxicsStandardsforInlandSurfaceWaters,EnclosedBays,andEstuariesofCalifornia(StateImplementationPolicyorSIP).TheSIPbecameeffectiveonApril28,2000,withrespecttotheprioritypollutantcriteriapromulgatedforCaliforniabytheUSEPAthroughtheNTRandtotheprioritypollutantobjectivesestablishedbytheRegionalWaterBoardintheBasinPlan.TheSIPbecameeffectiveonMay18,2000,withrespecttotheprioritypollutantcriteriapromulgatedbytheUSEPAthroughtheCTR.TheStateWaterBoardadoptedamendmentstotheSIPonFebruary24,2005,thatbecameeffectiveonJuly13,2005.TheSIPestablishesimplementationprovisionsforprioritypollutantcriteriaandobjectivesandprovisionsforchronictoxicitycontrol.RequirementsofthisOrderimplementtheSIP.

4. ComplianceSchedulesandInterimRequirements.Theprovisioninsection2.1oftheSIPthatallowedfortheuseofcomplianceschedulesandinterimlimitationsinan

001,002,and003

Groundwater Existing:Municipalanddomesticwatersupply(MUN)Agriculturalsupply(AGR)Industrialservicesupply(IND)Industrialprocesssupply(PRO)Hydropowergeneration(POW)

NPDESpermitforCTRconstituentsendedonMay18,2010.Basedonapermittee’srequestanddemonstrationthatitisinfeasibletocomplywithaneffluentlimitationderivedfromaCTRcriterion,complianceschedulesmaybeallowedinaceaseanddesistorderortimescheduleorderadoptedbytheRegionalWaterBoard.

TheStateWaterBoardadoptedResolutionNo.2008‐0025onApril15,2008,titledPolicyforComplianceSchedulesinNationalPollutantDischargeEliminationSystemPermits,whichincludescomplianceschedulepoliciesforpollutantsthatarenotaddressedbytheSIP.ThisPolicybecameeffectiveonAugust27,2008.

ThisOrderdoesnotincludeanyinterimeffluentlimitationsorcomplianceschedulesrelatedtodischargestosurfacewaters.TheOrderdoesinterimlimitsandacompliancescheduleforthePermitteetoachievecompliancewiththefinalirrigation/reclamationspecificationfortotalnitrogen.

5. AlaskaRule.OnMarch30,2000,USEPAreviseditsregulationthatspecifieswhennewandrevisedstateandtribalwaterqualitystandards(WQS)becomeeffectiveforCWApurposes(40CFR§131.21,65Fed.Reg.24641(April27,2000)).Undertherevisedregulation(alsoknownastheAlaskaRule),newandrevisedstandardssubmittedtoUSEPAafterMay30,2000,mustbeapprovedbyUSEPAbeforebeingusedforCWApurposes.ThefinalrulealsoprovidesthatstandardsalreadyineffectandsubmittedtoUSEPAbyMay30,2000,maybeusedforCWApurposes,whetherornotapprovedbyUSEPA.

6. AntidegradationPolicy.40CFR131.12requiresthatthestatewaterqualitystandardsincludeanantidegradationpolicyconsistentwiththefederalpolicy.TheStateWaterBoardestablishedCalifornia’santidegradationpolicyinStateWaterBoardResolutionNo.68‐16.ResolutionNo.68‐16incorporatesthefederalantidegradationpolicywherethefederalpolicyappliesunderfederallaw.ResolutionNo.68‐16requiresthatexistingwaterqualitybemaintainedunlessdegradationisjustifiedbasedonspecificfindings.TheRegionalWaterBoard’sBasinPlanimplements,andincorporatesbyreference,boththeStateandfederalantidegradationpolicies.Thepermitteddischargemustbeconsistentwiththeantidegradationprovisionof40CFR131.12andStateWaterBoardResolutionNo.68‐16.AsdiscussedindetailinsectionIV.D.2ofthisFactSheet,thepermitteddischargeisconsistentwiththeantidegradationprovisionof40CFR131.12andStateWaterBoardResolutionNo.68‐16.

7. Anti‐BackslidingRequirements.Sections402(o)(2)and303(d)(4)oftheCWAandfederalregulationsat40CFR122.44(l)restrictbackslidinginNPDESpermits.Theseanti‐backslidingprovisionsrequirethateffluentlimitationsinareissuedpermitmustbeasstringentasthoseinthepreviouspermit,withsomeexceptionsinwhichlimitationsmayberelaxed.

8. EndangeredSpeciesAct.ThisOrderdoesnotauthorizeanactthatresultsinthetakingofathreatenedorendangeredspeciesoranyactthatisnowprohibited,orbecomesprohibitedinthefuture,undereithertheCaliforniaEndangeredSpeciesAct(FishandGameCodesections2050to2097)ortheFederalEndangeredSpeciesAct(16U.S.C.Asections1531to1544).ThisOrderrequirescompliancewitheffluentlimits,receivingwaterlimits,andotherrequirementstoprotectthebeneficialusesofwatersoftheState.ThePermitteeisresponsibleformeetingallrequirementsoftheapplicableEndangeredSpeciesAct.

C. ImpairedWaterBodiesonCWA303(d)List

Section303(d)ofthefederalCWArequiresstatestoidentifywaterbodiesthatdonotmeetwaterqualitystandardsafterimplementationoftechnology‐basedeffluentlimitationsonpointsources.Eachstatemustsubmitanupdatedlist,the303(d)ListofImpairedWaterbodies,toUSEPAbyAprilofeachevennumberedyear.Inadditiontoidentifyingthewaterbodiesthatarenotsupportingbeneficialuses,the303(d)listalsoidentifiesthepollutantorstressorcausingimpairmentandestablishesaschedulefordevelopingacontrolplantoaddresstheimpairment.TheCWArequiresdevelopmentofatotalmaximumdailyload(TMDL)foreach303(d)listedpollutantandwaterbodycontaminant.TMDLsestablishthemaximumquantityofagivenpollutantthatcanbeaddedtoawaterbodyfromallsourceswithoutexceedingtheapplicablewaterqualitystandardforthatpollutantanddeterminewasteloadallocations(theportionofaTMDLallocatedtoexistingandfuturepointsources)andloadallocations(theportionofaTMDLattributedtoexistingandfuturenonpointsources).

OnOctober11,2011,theUSEPAprovidedfinalapprovalofthe2008‐2010303(d)listofimpairedwaterbodiespreparedbytheState.ThelistidentifiestheentireRussianRiverwatershedasimpairedbyexcesssedimentandelevatedwatertemperatures.PursuanttoCWAsection303(d),TMDLsaredevelopedtoaddressimpairingpollutantsin303(d)listedwaters,andarethenimplementedinpartthroughprovisionsofNPDESpermits.

AspectsofthesedimentimpairingtheRussianRiverincludesettleablesolids,suspendedsolids,andturbidity.Theimpactofsettleablesolidsresultswhentheycollectonthebottomofawaterbodyovertime,makingthemapersistentoraccumulativeconstituent.Theimpactofsuspendedsolidsandturbidity,bycontrast,resultsfromtheirconcentrationinthewatercolumn.

AnanalysisofthePermittee’seffluentmonitoringdataindicateslevelsofsettleablesolidsintheeffluentaregenerallynon‐detectable.LevelsofBOD5andTSSmaybeaconcernduetothefactthattheFacilityprovidesonlysecondarytreatmentanddischargeshigherconcentrationsandloadsofBOD5andTSSthanotherfacilitiesthatprovidetertiaryleveltreatment.Inaddition,becausethisFacilitydischargesfromapondthatreceivesnon‐

pointinputsofcowmanureandthedischargeratefromGraham’sPondiscalculatedbasedonDutchBillCreekflowsinCampMeeker,approximately1.5milesdownstream,portionsofDutchBillCreekbetweenGraham’sPondandCampMeekerreceiveeffluentdischargesatratesinexcessoftheonepercentdischargerateallowedbytheBasinPlan.ThePermitteeproposestoceasedischargestoDutchBillCreekwithinthenexttenyears,byconstructingadditionalstorageandirrigationinfrastructure.

The303(d)listingfortheRussianRiverlistssourcesofelevatedtemperatureasflowregulation/modification,habitatmodifications,nonpointsources,andremovalofriparianvegetation.Thecriticaltimeperiodfortemperatureisinthesummer,whichisalsothetimeperiodwhenpointsourcedischargesfromtheFacilityareprohibited.Therefore,compliancewiththesummerdischargeprohibitionwillensurethatthedischargedoesnotcontributetotheimpairmentoftheRussianRiver.

D. OtherPlans,PoliciesandRegulations

1. OnMay2,2006,theStateWaterBoardadoptedStateWaterBoardOrderNo.2006‐0003‐DWQ,StatewideGeneralWDRsforSanitarySewerSystemsandonFebruary20,2008adoptedOrderNo.WQ2008‐0002‐EXECAdoptingAmendedMonitoringandReportingRequirementsforStatewideGeneralWasteDischargeRequirementsforSanitarySewerSystems.OrderNo.2006‐0003‐DWQrequiresthatallpublicagenciesthatcurrentlyownoroperatesanitarysewersystemsapplyforcoverageundertheGeneralWDRs.ThedeadlinefordischargerstoapplyforcoveragewasNovember2,2006.ThePermitteeappliedforcoverageandissubjecttotherequirementsofOrderNos.2006‐0003‐DWQandWQ2008‐0002‐EXECandanyfuturerevisionstheretoforoperationofitswastewatercollectionsystem.

2. TheStateWaterBoardWaterQualityOrderNo.97‐03‐DWQ,NPDESGeneralPermitNo.CAS000001,WasteDischargeRequirementsforDischargesofStormWaterAssociatedwithIndustrialActivitiesExcludingConstructionActivitiesregulatesstormwaterdischargesfromwastewatertreatmentfacilitieswithdesignflowsgreaterthan1.0mgdunlessallstormwateriscapturedandtreatedand/ordisposedofwithinthefacility’sNPDESpermittedprocesswastewaterorifstormwaterisdisposedoftoevaporationponds,percolationponds,orcombinedsewersystems.ThedischargefromthisFacilityislessthan1mgd,thereforecoverageundertheGeneralStormWaterPermitisnotrequiredforthisFacility.SectionVII.B.11.aofthisFactSheetdiscussesthePermittee’shandlingofstormwater.

3. OnJuly22,2004,theStateWaterBoardadoptedStateWaterBoardOrderNo.2004‐0012‐DWQ,GeneralWasteDischargeRequirementsfortheDischargeofBiosolidstoLandforUseasaSoilAmendmentinAgricultural,Silvicultural,Horticultural,andLandReclamationActivities.TheOrderrequiresthePermitteetoobtaincoverage

underOrderNo.2004‐0012‐DWQpriortoanyremovalofbiosolidsfromtheFacilitythatwillbelanddisposedonpropertyownedorcontrolledbythePermittee.

4. OnFebruary3,2009theStateWaterBoardadoptedtheRecycledWaterPolicy(StateWaterBoardResolutionNo.2009‐0011)forthepurposeofincreasingtheuseofrecycledwaterfrommunicipalwastewatersourcesinamannerthatimplementsstateandfederalwaterqualitylaws.TheRecycledWaterPolicybecameeffectiveonMay14,2009.TheRecycledWaterPolicyprovidesdirectiontotheregionalwaterboardsregardingtheappropriatecriteriatobeusedinissuingpermitsforrecycledwaterprojectsanddescribespermittingcriteriaintendedtostreamline,andprovideconsistencyfor,thepermittingofthevastmajorityofrecycledwaterprojects.PertinentprovisionsandrequirementsofthepolicyhavebeenincorporatedintothisOrdertoaddressconditionsspecifictothePermittee’splantoimplementwaterrecycling.

TheRecycledWaterPolicyrecognizesthefactthatsomegroundwaterbasinsinthestatecontainsaltsandnutrientsthatexceedorthreatentoexceedwaterqualityobjectivesintheapplicableBasinPlans,andthatnotallBasinPlansincludeadequateimplementationproceduresforachievingorensuringcompliancewiththewaterqualityobjectivesforsaltornutrients.TheRecycledWaterPolicyfurtherrecognizesthattheseconditionscanbecausedbynaturalsoils/conditions,dischargesofwaste,irrigationusingsurfacewater,groundwaterorrecycledwater,andwatersupplyaugmentationusingsurfaceorrecycledwater,andthatregulationofrecycledwateralonewillnotaddresstheseconditions.ItistheintentoftheRecycledWaterPolicythatsaltsandnutrientsfromallsourcesbemanagedonabasin‐wideorwatershed‐widebasisinamannerthatensuresattainmentofwaterqualityobjectivesandprotectionofbeneficialuses.TheRecycledWaterPolicyfindsthattheappropriatewaytoaddresssaltandnutrientissuesisthroughthedevelopmentofregionalorsubregionalsaltandnutrientmanagementplansratherthanthroughimposingrequirementssolelyonindividualrecycledwaterprojects.

ThisOrderisconsistentwiththerequirementsoftheRecycledWaterPolicy.ThePermitteeisrequiredtoconductprioritypollutantmonitoringasrequiredbytheRecycledWaterPolicy.Inaddition,theRegionalWaterBoardisdevelopingaplantoaddresssaltandnutrientmanagement.ThisOrdermaybereopenedtoincorporateprovisionsconsistentwithanysaltandnutrientmanagementplan(s)adoptedbytheRegionalWaterBoard.

5. Priortomakinganychangeinthepointofdischarge,placeofuse,orpurposeofuseoftreatedwastewaterthatresultsinadecreaseofflowinanyportionofawatercourse,thePermitteemustfileapetitionwiththeStateWaterBoard,DivisionofWaterRights,andreceiveapprovalforsuchachange.TheStateWaterBoardretainsthejurisdictionalauthoritytoenforcesuchrequirementsunderWaterCodesection1211.

IV. RATIONALEFOREFFLUENTLIMITATIONSANDDISCHARGESPECIFICATIONS

TheCWArequirespointsourcedischargerstocontroltheamountofconventional,non‐conventional,andtoxicpollutantsthataredischargedintothewatersoftheUnitedStates.ThecontrolofpollutantsdischargedisestablishedthrougheffluentlimitationsandotherrequirementsinNPDESpermits.Therearetwoprincipalbasesforeffluentlimitationsinthe40CFR122.44(a)requiresthatpermitsincludeapplicabletechnology‐basedlimitationsandstandards;and40CFR122.44(d)requiresthatpermitsincludewaterquality‐basedeffluentlimitations(WQBELs)toattainandmaintainapplicablenumericandnarrativewaterqualitycriteriatoprotectthebeneficialusesofthereceivingwaterwhereareasonablepotentialtoexceedthosecriteriaexist.

A. DischargeProhibitions

1. DischargeProhibitionIII.A.ThedischargeofanywastenotdisclosedbythePermitteeornotwithinthereasonablecontemplationoftheRegionalWaterBoardisprohibited.

ThisprohibitionisbasedontheBasinPlanandStateWaterBoardOrderWQONo.2002‐0012regardingthepetitionofWDRsOrderNo.01‐072fortheEastBayMunicipalUtilityDistrictandBayAreaCleanWaterAgencies.InStateWaterBoardOrderNo.WQO2002‐0012,theStateWaterBoardfoundthatthisprohibitionisacceptableinorders,butshouldbeinterpretedtoapplyonlytoconstituentsthatareeithernotdisclosedbythePermittee,orarenotreasonablyanticipatedtobepresentinthedischargebuthavenotbeendisclosedbythePermittee.Itspecificallydoesnotapplytoconstituentsinthedischargethatdonothave“reasonablepotential”toexceedwaterqualityobjectives.

TheStateWaterBoardhasstatedthattheonlypollutantsnotcoveredbythisprohibitionarethosewhichwere“disclosedtothepermittingauthorityand…canbereasonablycontemplated.”[InrethePetitionofEastBayMunicipalUtilitiesDistrictetal.,(StateWaterBoard,2002)OrderNo.WQO2002‐0012,p.24]InthatOrder,theStateWaterBoardcitedacasewhichheldthePermitteeisliableforthedischargeofpollutants“notwithinthereasonablecontemplationofthepermittingauthority….whetherspillsorotherwise…”[PineyRunPreservationAssn.v.CountyCommissionersofCarrollCounty,Maryland(4thCir.2001)268F.3d255,268.]ThustheStateWaterBoardauthorityprovidesthat,tobepermissible,theconstituentdischarged(1)musthavebeendisclosedbythePermitteeand(2)canbereasonablycontemplatedbytheRegionalWaterBoard.

WhetherornotthePermitteereasonablycontemplatesthedischargeofaconstituentisnotrelevant.WhatmattersiswhetherthePermitteedisclosedtheconstituenttotheRegionalWaterBoardorwhetherthepresenceofthepollutantinthedischarge

canotherwisebereasonablycontemplatedbytheRegionalWaterBoardatthetimeofOrderadoption.

2. DischargeProhibitionIII.B.Creationofpollution,contamination,ornuisance,asdefinedbysection13050oftheWaterCodeisprohibited.

Thisprohibitionisbasedonsection13050oftheWaterCode,andhasbeenretainedfromOrderNo.93‐42.

3. DischargeProhibitionIII.C.Thedischargeofsludgeordigestersupernatantisprohibited,exceptasauthorizedundersectionVI.C.5.c.(SludgeDisposalandHandlingRequirements,sectionVI.C.5.coftheOrder.)

Thisprohibitionisbasedonrestrictionsonthedisposalofsewagesludgefoundinfederalregulations(40CFRPart503(Biosolids),Part527andPart258)andtitle27oftheCaliforniaCodeofRegulations(CCR).IthasbeenretainedfromOrderNo.93‐42.

4. DischargeProhibitionIII.D.Thedischargeorreclamationuseofuntreatedorpartiallytreatedwastefromanywherewithinthecollection,treatment,ordisposalsystemsisprohibited,exceptasprovidedforinAttachmentD,StandardProvisions(Bypass).

ThisprohibitionhasbeenretainedfromtheOrderNo.93‐42andisbasedontheBasinPlantoprotectbeneficialusesofthereceivingwaterfromunpermitteddischarges,andtheintentoftheWaterCodesections13260through13264relatingtothedischargeofwastetowatersoftheStatewithoutfilingforandbeingissuedanOrder.Thisprohibitionappliestospillsnotrelatedtosanitaryseweroverflows(SSOs)andotherunauthorizeddischargesofwastewaterwithinthecollection,treatment,anddisposalfacilities.Thedischargeofuntreatedorpartiallytreatedwastewaterfromthecollection,treatment,ordisposalfacilityrepresentsanunauthorizedbypasspursuantto40CFR122.41(m)oranunauthorizeddischargewhichposesathreattohumanhealthand/oraquaticlife,andthereforeisexplicitlyprohibitedbythisOrder.

5. DischargeProhibitionIII.E.AnySSOthatresultsinadischargeofuntreatedorpartiallytreatedwastewaterto(a)watersoftheState,(b)groundwater,or(c)landthatcreatespollution,contamination,ornuisance,asdefinedinWaterCodesection13050(m)isprohibited.

ThisprohibitionappliestospillsrelatedtoSSOsandisbasedonStatestandards,includingsection13050oftheWaterCodeandtheBasinPlan.ThisprohibitionisconsistentwiththeState’santidegradationpolicyasspecifiedinStateWaterBoard

ResolutionNo.68‐16(StatementofPolicywithRespecttoMaintainingHighQualityofWaterinCalifornia)inthattheprohibitionimposesconditionstopreventimpactstowaterquality,thedegradationofwaterquality,negativeeffectsonreceivingwaterbeneficialuses,andlesseningofwaterqualitybeyondthatprescribedinStateWaterBoardorRegionalWaterBoardplansandpolicies.

ThisprohibitionisstricterthantheprohibitionsstatedinStateWaterBoardOrder2006‐003‐DWQ,StatewideGeneralWasteDischargeRequirementsforSanitarySewerSystems.OrderNo.2006‐0003‐DWQprohibitsSSOsthatresultinthedischargeofuntreatedorpartiallytreatedwastewatertowatersoftheUnitedStatesandSSOsthatcauseanuisance,comparedtoProhibitionIII.EofthisOrder,whichprohibitsSSOdischargesthatcreatenuisanceorpollutiontowatersoftheState,groundwater,andlandforamorecompleteprotectionofhumanhealth.TherationaleforthisprohibitionisbecauseoftheprevalenceofhighgroundwaterintheNorthCoastRegion,andthisRegion’srelianceongroundwaterasadrinkingwatersource.

6. DischargeProhibitionIII.F.ThedischargeofwastetolandthatisnotownedorunderagreementtousebythePermitteeisprohibited,exceptforuseforfiresuppressionasprovidedintitle22,sections60307(a)and(b)oftheCCR.

ThisprohibitionisretainedfromOrderNo.93‐42.LandusedfortheapplicationofwastewatermustbeownedbythePermitteeorbeunderthecontrolofthePermitteebycontractsothatthePermitteemaintainsameansforultimatedisposaloftreatedwastewater.

7. DischargeProhibitionIII.G.ThedischargeofwasteatanypointnotdescribedinFindingII.BorauthorizedbyapermitissuedbytheStateWaterBoardoranotherRegionalWaterBoardisprohibited.

ThisprohibitionisageneralprohibitionthatallowsthePermitteetodischargewasteonlyinaccordancewithWDRs.Itisbasedonsections301and402ofthefederalCWAandsection13263oftheWaterCode.

8. DischargeProhibitionIII.H.TheaverageannualdryweatherflowofwasteintotheFacilityinexcessofdesignflowof0.05mgdisprohibited.Averageannualdryweatherflowisthearithmeticmeanoftheinfluentflowforthefourconsecutivelowestflowmonthsinacalendaryear.

ThisprohibitionisbasedonthedryweatherdesigncapacityoftheFacility.

9. DischargeProhibitionIII.I.ThedischargeofwastewatereffluentfromtheFacilitytoDutchBillCreekoritstributariesisprohibitedduringtheperiodofMay15throughSeptember30ofeachyear.

ThisprohibitionisretainedfromthepreviousOrder,andisrequiredbytheBasinPlan.TheBasinPlanprohibitsdischargestotheRussianRiveranditstributariesduringtheperiodofMay15throughSeptember30(Chapter4,NorthCoastalBasinDischargeProhibitionNo.3).TheoriginalintentofthisprohibitionwastopreventthecontributionofwastewatertothebaselineflowoftheRussianRiverduringtheperiodoftheyearwhentheRussianRiveranditstributariesexperiencetheheaviestwater‐contactrecreationuse.

10. DischargeProhibitionIII.J.DuringtheperiodfromOctober1throughMay14,dischargesoftreatedwastewatershallnotexceed1percentoftheflowofDutchBillCreekasmeasuredattheCampMeekerBridge.

ThisprohibitionisretainedfromthepreviousOrderandisrequiredbytheBasinPlan(Chapter4,NorthCoastalBasinDischargeProhibitionNo.3).TheBasinPlanprohibitsdischargestotheRussianRiveranditstributarieswhenthewastedischargeflowisgreaterthanonepercentofthereceivingwater’sflow.

BasinPlanProhibitionNo.4doesnotspecifyhowcompliancewiththeone‐percentflowrequirementshouldbedetermined.Thisprohibition,setforthinProvisionIII.KofthisOrder,specifiesthatthedischargemaycomplywiththe1percentrequirementasamonthlyaverageforthesurfacewaterdischargeseason,providedthePermitteemakesareasonableefforttoadjustthedischargeoftreatedwastewatertoonepercentofthemostrecentdailyflowmeasurementofDutchBillCreek,asmeasuredattheCampMeekerbridge.Thismodificationprovidesday‐to‐dayoperationalflexibilityforthePermitteewhileretainingtheintentoftheprohibition.

11. DischargeProhibitionIII.K.ThedischargeofanyradiologicalorbiologicalwarfareagentintowatersofthestateisprohibitedunderWaterCodesection13375.

Thisprohibitionisbasedonsection13375oftheWaterCode.

B. Technology‐BasedEffluentLimitations

1. ScopeandAuthority

Section301(b)oftheCWAandimplementingUSEPApermitregulationsatsection40CFR122.44,requirethatpermitsincludeconditionsmeetingapplicabletechnology‐basedrequirementsataminimum,andanymorestringenteffluentlimitationsnecessarytomeetapplicablewaterqualitystandards.ThedischargeauthorizedbytheOrdermustmeetminimumfederaltechnology‐basedrequirementsbasedonSecondaryTreatmentStandardsat40CFRPart133andBestProfessionalJudgment(BPJ)inaccordancewith40CFR125.3.

Regulationspromulgatedin40CFR125.3(a)(1)requiretechnology‐basedeffluentlimitationsformunicipaldischargerstobeplacedinNPDESpermitsbasedonSecondaryTreatmentStandardsorEquivalenttoSecondaryTreatmentStandards.

TheFederalWaterPollutionControlActAmendmentsof1972(PL92‐500)establishedtheminimumperformancerequirementsforPOTWs(definedinsection304(d)(1)oftheCWA)].Section301(b)(1)(B)oftheCWArequiresthatsuchtreatmentworksmust,asaminimum,meeteffluentlimitationsbasedonsecondarytreatmentasdefinedbytheUSEPAAdministrator.

Basedonthisstatutoryrequirement,USEPAdevelopedsecondarytreatmentregulations,whicharespecifiedin40CFRPart133.Thesetechnology‐basedregulationsapplytoallmunicipalwastewatertreatmentplantsandidentifytheminimumlevelofeffluentqualityattainablebysecondarytreatmentintermsofBOD5,TSS,andpH,asfollows:

2. BOD5andTSS

a. The30‐dayaverageshallnotexceed30mg/L.

b. The7‐dayaverageshallnotexceed45mg/L.

c. The30‐dayaveragepercentremovalshallnotbelessthan85%.

ThepHshallbemaintainedwithinthelimitsof6.0to9.0.

TheeffluentlimitationforpHrequiredtomeetthewaterqualityobjectiveforhydrogenionconcentration(pH)iscontainedintheBasinPlan,Table3‐1.

Inaddition,40CFR122.45(f)requirestheestablishmentofmass‐basedeffluentlimitationsforallpollutantslimitedinOrders,exceptfor1)pH,temperature,radiation,orotherpollutantswhichcannotbeappropriatelyexpressedbymass,and2)whenapplicablestandardsandlimitationsareexpressedintermsofotherunitsofmeasure.

4. ApplicableTechnology‐BasedEffluentLimitations

TheeffluentlimitationsinthisOrderforBOD5,TSS,andpHmeetthetechnology‐basedrequirementsforsecondarytreatmentsetforthin40CFR133.102.MorestringenteffluentlimitationsforBOD5,TSS,andpHhavebeenestablishedthatalsomeetthewaterquality‐basedrequirementssetforthintheBasinPlan.

Inadditiontotheminimum,federaltechnology‐basedrequirements,theBasinPlanrequiresthatdischargesofmunicipalwaste“shallbeofadvancedtreatedwastewaterinaccordancewitheffluentlimitationscontainedinNPDESpermitsforeachaffecteddischarger,andshallmeetamediancoliformlevelof2.2MPN/100mL”fordischargestotheRussianRiveranditstributariesduringOctober1throughMay14.ThisrequirementleavesdiscretiontotheRegionalWaterBoardtodefineadvancedwastewatertreatmentbytheimplementationofeffluentlimitationsinindividualpermits.

a. DischargePoint001(DischargetotheRussianRiver)

i. BOD5andTSS.ThePermitteeisabletoachievetheBOD5andTSSeffluentlimitationsidentifiedinsectionIV.B.2above.However,forthepurposeofapplyingadvancedwastewatertreatmentrequirementsonthedischargetoGraham’sPondandDutchBillCreek,effluentlimitationsforBOD5andTSSareestablishedat10mg/Lasamonthlyaverageand15mg/Lasaweeklyaverage.Currently,theseeffluentlimitationsarenottechnicallyachievablebecausethePermitteedoesnothaveatertiarywastewatertreatmentsystem.Inadditiontotheseconcentration‐basedeffluentlimitations,40CFR133.102,indescribingtheminimumlevelofeffluentqualityattainablebysecondarytreatment,statesthatthe30‐dayaveragepercentremovalshallnotbelessthan85percent.ThepercentremovaleffluentlimitationsarestricterthanOrderNo.93‐42whichhada65percentremovalrequirementforBOD5andnopercentremovalrequirementfortotalsuspendedsolids.MonitoringdatacollectedbythePermitteeinrecentyearshasdemonstratedthatthePermitteeisabletomeetthe85%removalrequirementsforBOD5.BasedonareviewoftheTSSpercentremovalperformanceinrecentyears,aninterimpercentremovalrequirementof65%isestablishedintheOrder.

ii. pH.Thesecondarytreatmentregulationsat40CFRPart133requirethatpHbemaintainedbetween6.0and9.0standardunits.

5. Mass‐BasedEffluentLimitations.MasseffluentlimitationsforBOD5andTSSarerequiredpursuantto40CFR122.45(f)forthepurposeofassuringthatdilutionisnotusedasamethodofachievingtheconcentrationlimitationsinthepermit.Mass‐basedeffluentlimitationsaretechnology‐based;andforthispermitarebasedontheFacility’sdesigndry‐weathercapacityof0.05mgd.

6. TotalColiformBacteria.Eventhougheffluentlimitsforcoliformbacteriaarenotset

outinthefederalregulationsforsecondarytreatment,theyareincludedhereinthesectionontechnology‐basedeffluentlimitsbecausetheyreflecttechnologystandardsfortertiarytreatment.Coliformbacteriaareapollutantofconcerninallwastewaters

ofdomesticorigin.TheOrderestablisheseffluentlimitationsfortotalcoliformbacteriathataremorestringentthanOrderNo.93‐42.TheseeffluentlimitationsreflectstandardsfortertiarytreatedeffluentintheBasinPlan(Section4,ImplementationPlans)andutilizethedefinitionoftertiarytreatedrecycledwateradoptedbytheCaliforniaDepartmentofPublicHealth(CDPH)intitle22oftheCCR.OrderNo.93‐42established30‐daymedianandmaximumdailyeffluentlimitationsthatwerebasedontheBasinPlanrequirementforAWTandtitle22tertiarystandards.ThisOrderestablishesa7‐dayrollingmedian,30‐daymaximum,andsinglesamplemaximum,basedontertiarystandardsasestablishedintitle22.AlthoughtheFacilitydoesnotprovidetertiarytreatment,disinfectionstandardshavebeenheldtothetertiarytreatmentstandardstoensurethateffluentdischargedtoDutchBillCreekisprotectiveofpublichealth.

C. WaterQuality‐BasedEffluentLimitations(WQBELs)

Section301(b)oftheCWAand40CFR122.44(d)requirethatpermitsincludelimitationsmorestringentthanapplicablefederaltechnology‐basedrequirementswherenecessarytoachieveapplicablewaterqualitystandards.TheOrdercontainsrequirements,expressedastechnologyequivalencerequirementsthatarenecessarytomeetapplicablewaterqualitystandards.Therationalefortheserequirements,whichconsistofadvancedwastewatertreatment,isdiscussedinsectionIV.B.4ofthisFactSheet.Inaddition,theOrdercontainsadditionalrequirementstomeetapplicablewaterqualitystandards.TherationalefortheserequirementsisdiscussedinthissectionoftheFactSheet.

40CFR122.44(d)(1)(i)requiresthatpermitsincludeeffluentlimitationsforallpollutantsthatareormaybedischargedatlevelsthathavethereasonablepotentialtocauseorcontributetoanexceedanceofawaterqualitystandard,includingnumericandnarrativeobjectiveswithinastandard.Areasonablepotentialanalysis(RPA)demonstratedreasonablepotentialfordischargesfromtheFacilitytocauseorcontributetoexceedancesofcopper,lead,silver,cyanide,DCBM,CDBM,bis(2‐ethylhexyl)phthalate,andammonia.

Wherereasonablepotentialhasbeenestablishedforapollutant,butthereisnonumericcriterionorobjectiveforthepollutant,WQBELsmustbeestablishedusing:(1)USEPAcriteriaguidanceunderCWAsection304(a),supplementedwherenecessarybyotherrelevantinformation;(2)anindicatorparameterforthepollutantofconcern;or(3)acalculatednumericwaterqualitycriterion,suchasaproposedstatecriterionorpolicyinterpretingthestate’snarrativecriterion,supplementedwithotherrelevantinformation,asprovidedin40CFR122.44(d)(1)(vi).

TheprocessfordeterminingreasonablepotentialandcalculatingWQBELswhennecessaryisintendedtoprotectthedesignatedusesofthereceivingwaterasspecifiedintheBasinPlan,andachieveapplicablewaterqualityobjectivesandcriteriathatarecontainedinotherstateplansandpolicies,oranyapplicablewaterqualitycriteriacontainedintheCTRandNTR.

2. ApplicableBeneficialUsesandWaterQualityCriteriaandObjectives

a. BeneficialUses.BeneficialusedesignationsforreceivingwatersfordischargesfromtheFacilityarepresentedinsectionIII.B.1ofthisFactSheet.

b. BasinPlanWaterQualityObjectives.Inadditiontothespecificwaterqualityobjectivesindicatedabove,theBasinPlancontainsnarrativeobjectivesforcolor,tastesandodors,floatingmaterial,suspendedmaterial,settleablematerial,oilandgrease,biostimulatorysubstances,sediment,turbidity,pH,dissolvedoxygen,bacteria,temperature,toxicity,pesticides,chemicalconstituents,andradioactivitythatapplytoinlandsurfacewaters,enclosedbays,andestuaries,andincludestheRussianRiveranditstributaries.Forwatersdesignatedforuseasdomesticormunicipalsupply(MUN),theBasinPlanestablishesasapplicablewaterqualitycriteriatheMaximumContaminantLevels(MCLs)establishedbyCDPHfortheprotectionofpublicwatersuppliesattitle22oftheCCRsection64431(InorganicChemicals)andsection64444(OrganicChemicals).

c. SIP,CTRandNTR.WaterqualitycriteriaandobjectivesapplicabletothisreceivingwaterareestablishedbytheCaliforniaToxicsRule(CTR),establishedbytheUSEPAat40CFR131.38;andtheNationalToxicsRule(NTR),establishedbytheUSEPAat40CFR131.36.Criteriaformostofthe126prioritypollutantsarecontainedwithintheCTRandtheNTR.

Aquaticlifefreshwaterandsaltwatercriteriaareidentifiedascriterionmaximumconcentrations(CMC)andcriterioncontinuousconcentrations(CCC).TheCTRdefinestheCMCasthehighestconcentrationofapollutanttowhichaquaticlifecanbeexposedforashortperiodoftimewithoutdeleteriouseffectsandtheCCCasthehighestconcentrationofapollutanttowhichaquaticlifecanbeexposedforanextendedperiodoftime(4days)withoutdeleteriouseffects.TheCMCisusedtocalculateanacuteor1‐houraveragenumericeffluentlimitationandtheCCCisusedtocalculateachronicor4‐dayaveragenumericeffluentlimitation.AquaticlifefreshwatercriteriawereusedfortheRPA,andforthecalculationofeffluentlimitationsforcopper.

Humanhealthcriteriaarefurtheridentifiedas“waterandorganisms”and“organismsonly.”“Waterandorganism”criteriaaredesignedtoaddressriskstohumanhealthfrommultipleexposurepathways.Thecriteriafromthe“waterand

organisms”columnofCTRwereusedfortheRPAbecausetheBasinPlanidentifiesthatthereceivingwater,TheRussianRiverhasthebeneficialusedesignationofmunicipalanddomesticsupply.Effluentlimitationswereestablishedfor2,3,7,8‐TCDDandnitratebasedoncriteriafortheprotectionofhumanhealth.

TheSIP,whichisdescribedinsectionIII.B.3ofthisFactSheet,includesproceduresfordeterminingtheneedfor,andthecalculationof,WQBELsandrequiresdischargerstosubmitdatasufficienttodoso.

Attitle22,division4,chapter15oftheCCR,CDPHhasestablishedMCLsforcertainpollutantsfortheprotectionofdrinkingwater.Chapter3oftheBasinPlanestablishestheseMCLsaswaterqualityobjectivesapplicabletoreceivingwaterswiththebeneficialusedesignationofmunicipalanddomesticsupply.

AttachmentF‐1includesasummaryofRPAresultsforallprioritytoxicpollutantsandammonia,nitrate,andphosphorus,withwaterqualitycriteria/objectivesthatareapplicabletoDutchBillCreek.

3. DeterminingtheNeedforWQBELs

NPDESregulationsat40CFR122.44(d)requireeffluentlimitationstocontrolallpollutantswhichareormaybedischargedatalevelwhichwillcause,havethereasonablepotentialtocause,orcontributetoanexcursionaboveanyStatewaterqualitystandard.

a. Non‐PriorityPollutants

i. pH.TheeffluentlimitationforpHof6.5to8.5isretainedfromOrderNo.93‐42andappliestodischargestoGraham’sPond.ThislimitationisbasedonthewaterqualityobjectiveforallsurfacewatersoftheNorthCoastRegionestablishedinChapter3oftheBasinPlan.Federaltechnology‐basedrequirementsprescribedin40CFR133arenotsufficienttomeettheseBasinPlanwaterqualitystandards.

ii. ChlorineResidual.TheBasinPlanestablishesanarrativewaterqualityobjectivefortoxicity,statingthat“[a]llwatersshallbemaintainedfreeoftoxicsubstancesinconcentrationsthataretoxicto,orthatproducedetrimentalphysiologicalresponsesinhuman,plant,animal,oraquaticlife.”TheRegionalWaterBoardconsidersanychlorinateddischargeashavingthereasonablepotentialtocauseorcontributetoexceedancesofthiswaterqualityobjectivefortoxicity,andtherefore,theOrderestablisheseffluentlimitationsforchlorine.USEPAhasestablishedthefollowingcriteriaforchlorine‐produced

oxidantsforprotectionoffreshwateraquaticlife.[QualityCriteriaforWater1986(TheGoldBook,1986,EPA440/5/‐86‐001)]

ChronicCriterion AcuteCriterion

0.011mg/L 0.019mg/L

OrderNo.93‐42requiredthattherebenodetectableleveloftotalchlorineintheeffluenttoDutchBillCreekusingananalyticalmethodorchlorineanalyzerwithaminimumdetectionlevelof0.1mg/L.TheOrderreviseseffluentlimitationsforchlorineresidualtobeconsistentwiththewaterqualitycriteria,whicharebelowcurrentanalyticaldetectionlimits.ThewaterqualitycriteriarecommendedbyUSEPAhavebeentranslatedtoaveragemonthlyandmaximumdailyeffluentlimitationsfortotalchlorineresidual.ThenewchlorineresidualeffluentlimitationsestablishedinthisOrderarenumericallylowerthantheminimumdetectionlimitforthefinaleffluentlimitationinthepreviousOrderthatrequirednodetectablelevelofchlorineineffluentatthepointofdischargeatadetectionlimitof0.1mg/L.ThePermittee’scontinuouschlorineresidualmonitoriscapableofachievingthemorestringentchlorineresidualeffluentlimitations.

iii. AmmoniaandNitrate.Untreateddomesticwastewatercontainsammonia.Nitrificationisabiologicalprocessthatconvertsammoniatonitriteandnitrate.Denitrificationisaprocessthatconvertsnitratetonitrogengas,whichisthenreleasedtotheatmosphere.Wastewatertreatmentfacilitiescommonlyusenitrificationtoremoveammoniafromthewastestreamanddenitrificationtoremovenitratefromthewastestream.Inadequateorincompletenitrificationmayresultinthedischargeofammoniatothereceivingwaterandinadequateorincompletedenitrificationmayresultinthedischargeofnitratetothereceivingwater.DuetothefactthatthisFacilitydoesnotprovidenitrificationordenitrification,effluentdischargedtoGraham’sPondcontainshighconcentrationsofammoniaandlowconcentrationsofnitrate.Asdiscussedinthefollowingparagraphs,effluentlimitationsforbothnitrateandammoniaarenecessaryintheOrdertoassurethatthePermitteeprotectsthebeneficialusesofthereceivingwatersandtopreventaquatictoxicity.

Nitrate.Nitrateisknowntocauseadversehealtheffectsinhumans.Forwatersdesignatedasdomesticormunicipalsupply,theBasinPlan(Chapter3)adoptstheMCLs,establishedbyCDPHfortheprotectionofpublicwatersuppliesattitle22oftheCCR,section64431(InorganicChemicals)and64444(OrganicChemicals).TheMCLfornitrate(10mg/LasN)istherefore

applicableasawaterqualitycriterionfordischargestoGraham’sPondandDutchBillCreek.

ThePermitteesampleditseffluentdischargetoGraham’sPondfornitrate45timesbetweenOctober2008andJune2012.Monitoringresults,reportedasnitrogen,showedaconcentrationrangebetween<0.2mg/Land5.8mg/L.Twenty‐nineofthesampleswere<0.2mg/Landtherangeofthe16sampleswithdetectableconcentrationsofnitratewas0.3mg/Lto5.8mg/LasNwiththemaximumconcentrationof5.8mg/LoccurringinOctober2009.DuetothefactthattheFacilitydoesnotprovideanynitrogenremovalandammoniamaybeconvertedtonitrateunderappropriateconditions,theRegionalWaterBoardconcludesthatdischargesfromtheFacilityhaveareasonablepotentialtocauseorcontributetoexceedancesofapplicablewaterqualitycriteriainthereceivingwater.TheOrderthereforeestablisheseffluentlimitationsfornitratefortheprotectionofhumanhealth.

Ammonia.Ammoniaisknowntocausetoxicitytoaquaticorganismsinsurfacewaters.TheBasinPlanestablishesanarrativewaterqualityobjectivefortoxicity,statingthat“[a]llwatersshallbemaintainedfreeoftoxicsubstancesinconcentrationsthataretoxicto,orthatproducedetrimentalphysiologicalresponsesinhuman,plant,animal,oraquaticlife.”DischargesoftoxicconcentrationsofammoniawouldviolatetheBasinPlannarrativetoxicityobjective.Duetoconcernsregardingammoniatoxicity,theRegionalWaterBoardreliesonUSEPA’srecommendedwaterqualitycriteriaforammoniainfreshwaterfromthe1999UpdateofAmbientWaterQualityCriteriaforAmmonia,EPA‐822‐R‐99‐014(1999)tointerprettheBasinPlan’snarrativeobjectivefortoxicity.USEPAhasrecommendedacuteandchronicwaterqualitycriteriafortheprotectionofaquaticlife,whicharedependentonreceivingwaterpHandthepresence/absenceofsalmonids(acutecriteria),andpH,temperature,andthepresence/absenceofearlylifestagesoffish(chroniccriteria).EPAfoundthataspHincreased,boththeacuteandchronictoxicityofammoniaincreased.Salmonidsweremoresensitivetoacutetoxicityeffectsthanotherspecies.However,whiletheacutetoxicityofammoniawasnotinfluencedbytemperature,itwasfoundthatinvertebratesandyoungfishexperiencedincreasingchronictoxicityeffectswithincreasingtemperature.

SincetheDutchBillCreekandtheRussianRiveraresalmonidstreams,onlytheformulasandtablessummarizingcalculationsfromtheseformulasarepresentedinthediscussionbelow.

Thethirty‐dayaverageconcentrationoftotalammonia(inmg/LNineffluent)shallnotexceedthecontinuousconcentrationcriteria(CCCorchroniccriterion),appliedhereastheAMEL,calculatedusingthefollowingequation:Whenfishearlylifestagesarepresent:

(a) CCC=((0.0577/(1+107.688‐pH))+(2.487/(1+10pH‐7.688))xMIN(2.85,1.45·100.028·(25‐T))

CalculatedchroniccriteriaaresummarizedinTableF‐5,below.

TableF‐5.USEPAAcute(30‐dayaverage)CriteriaforAmmonia

Forexample,receivingwaterconditionsofapHof7.8,atemperatureof18°C,andfishearlylifestagespresentwouldhaveachronicammoniaeffluentlimitationof2.54mg/L.

0 14 15 16 18 20 22 24 26 28 306.5 6.67 6.67 6.46 6.06 5.33 4.68 4.12 3.62 3.18 2.80 2.466.6 6.57 6.57 6.36 5.97 5.25 4.61 4.05 3.56 3.13 2.75 2.426.7 6.44 6.44 6.25 5.86 5.15 4.52 3.98 3.50 3.07 2.70 2.376.8 6.29 6.29 6.10 5.72 5.03 4.42 3.89 3.42 3.00 2.64 2.326.9 6.12 6.12 5.93 5.56 4.89 4.30 3.78 3.32 2.92 2.57 2.257.0 5.91 5.91 5.73 5.37 4.72 4.15 3.65 3.21 2.82 2.48 2.187.1 5.67 5.67 5.49 5.15 4.53 3.98 3.50 3.08 2.70 2.38 2.097.2 5.39 5.39 5.22 4.90 4.31 3.78 3.33 2.92 2.57 2.26 1.997.3 5.08 5.08 4.92 4.61 4.06 3.57 3.13 2.76 2.42 2.13 1.877.4 4.73 4.73 4.59 4.30 3.78 3.32 2.92 2.57 2.26 1.98 1.747.5 4.36 4.36 4.23 3.97 3.49 3.06 2.69 2.37 2.08 1.83 1.617.6 3.98 3.98 3.85 3.61 3.18 2.79 2.45 2.16 1.90 1.67 1.477.7 3.58 3.58 3.47 3.25 2.86 2.51 2.21 1.94 1.71 1.50 1.327.8 3.18 3.18 3.09 2.89 2.54 2.23 1.96 1.73 1.52 1.33 1.177.9 2.80 2.80 2.71 2.54 2.24 1.96 1.73 1.52 1.33 1.17 1.038.0 2.43 2.43 2.36 2.21 1.94 1.71 1.50 1.32 1.16 1.02 0.908.1 2.10 2.10 2.03 1.91 1.68 1.47 1.29 1.14 1.00 0.88 0.778.2 1.79 1.79 1.74 1.63 1.43 1.26 1.11 0.97 0.86 0.75 0.668.3 1.52 1.52 1.48 1.39 1.22 1.07 0.94 0.83 0.73 0.64 0.568.4 1.29 1.29 1.25 1.17 1.03 0.91 0.80 0.70 0.62 0.54 0.488.5 1.09 1.09 1.06 0.99 0.87 0.76 0.67 0.59 0.52 0.46 0.408.6 0.92 0.92 0.89 0.84 0.73 0.65 0.57 0.50 0.44 0.39 0.348.7 0.78 0.78 0.75 0.71 0.62 0.55 0.48 0.42 0.37 0.33 0.298.8 0.66 0.66 0.64 0.60 0.53 0.46 0.41 0.36 0.32 0.28 0.248.9 0.56 0.56 0.55 0.51 0.45 0.40 0.35 0.31 0.27 0.24 0.219.0 0.49 0.49 0.47 0.44 0.39 0.34 0.30 0.26 0.23 0.20 0.18

Continuous Concentration Criteria for Fish Early Life Stages Present, 30-day average (mg N/L)

pHTemperature, °C

Theone‐houraverageconcentrationoftotalammonianitrogen(inmg/LN)wheresalmonidfisharepresentshallnotexceedthecontinuousmaximumconcentration(CMCoracutecriterion),appliedhereastheMDEL,ascalculatedusingthefollowingequations:(b)Wheresalmonidfisharepresent:

CMC=(0.275/(1+107.204‐pH))+(39.0/(1+10pH‐7.204))

CalculatedacutecriteriaaresummarizedinTableF‐6,below.

TableF‐6.USEPAChronic(1‐houraverage)CriteriaforAmmonia

CriteriaMaximumConcentration,1‐houraverage,(mgN/L)

pH SalmonidsPresent6.5 32.66.6 31.36.7 29.86.8 28.06.9 26.27.0 24.17.1 21.97.2 19.77.3 17.57.4 15.37.5 13.37.6 11.47.7 9.67.8 8.17.9 6.88.0 5.68.1 4.68.2 3.88.3 3.18.4 2.68.5 2.18.6 1.88.7 1.58.8 1.28.9 1.09.0 0.9

Forexample,receivingwaterconditionswithapHof7.8andthepresenceofsalmonidfishwouldhaveanacutelimitationforammoniaof8.1mg/L.

TotalAmmoniaReasonablePotentialAnalysis.

ThePermitteesampleditseffluentdischargetoGraham’sPondforammonia45timesbetweenOctober2008andJune2012.Themonitoringdatashowsarangeofammoniaconcentrationsbetween3.8and24mg/Landanaveragetotalammoniaconcentrationof12.83mg/L.Themaximumconcentrationof24mg/LoccurredinJune2011.ThePermitteealsosampleditsdischargetoGraham’sPondforpHonalldatesthatammoniawassampledandfortemperatureon17ofthedatesthatammoniawassampled.AreasonablepotentialanalysisconductedontheeffluentdatadischargedtoGraham’sPondshowsthatthereisreasonablepotentialforthedischargetocauseorcontributetoanexcursionabovetheapplicablecriterionorobjectiveforammonia,thuseffluentlimitationsforammoniaareincludedinthisOrder.

InconditionsdocumentedinthereceivingwaterfordischargesfromtheFacility(maximumdownstreampH=8.0fortheacuteconditionandhighestaveragemonthlydownstreamtemperature=16.5°CandhighestaveragemonthlydownstreampHof8.0forthechroniccondition)andtheknownpresenceofearlylifestagesoffishinDutchBillCreek,towhichtheFacilitydischarges,USEPA’srecommendedchronicandacutecriteriafortheprotectionofaquaticlifefromammoniatoxicityare2.14mg/Land5.4mg/Ltotalammonia,respectively,expressedasN.

BecauseammoniahasbeenmeasuredintheeffluentatconcentrationsgreaterthanUSEPA’srecommendedwaterqualitycriteriaforfreshwaters,theRegionalWaterBoardconcludesthatdischargesfromtheFacilityhaveareasonablepotentialtocauseorcontributetoexceedancesoftheBasinPlan’sapplicablenarrativewaterqualitycriterionfortoxicity.TheOrderthereforeestablishesfinaleffluentlimitationsforammoniafortheprotectionofaquaticlife.USEPArequiresdiscretefinaleffluentlimitationsratherthanfloatinglimits(limitsdeterminedbasedonthereceivingwaterpHandtemperatureatthetimeofthesamplingevent)fortotalammoniatherefore,discreteeffluentlimitationsforammoniaareincludedintheOrder.

Thereasonablepotentialanalysiswasconductedusing45ammoniaresultsbetweenSeptember2008andJune2012.Theaverageofthe45sampleswas12.8andthestandarddeviationwas5.361resultinginacoefficientofvariationof0.42.Aspreadsheetwasusedtocalculatethefinaleffluentlimitations,withkeyvaluesusedinthecalculationsummarizedasfollows:

TableF‐7.DeterminationofLongTermAveragesforAmmonia

PollutantECA ECAMultiplier LTA(µg/L)

Acute Chronic Acute Chronic Acute ChronicAmmonia 2.14 5.35 0.42 0.63 0.9 3.37

TableF‐8.DeterminationofFinalWQBELsBasedonAquaticLifeCriteriaforAmmonia

Pollutant LowestLTA(µg/L)

MDELMultiplier

AMELMultiplier

MDEL(µg/L)

AMEL(µg/L)

Ammonia 0.9 2.35 1.38 2.1 1.2

Theaveragemonthlyeffluentlimitation(AMEL)isbasedoncontinuouscriteriaestablishedbyUSEPAandthemaximumdailyeffluentlimitation(MDEL)isbasedoncriteriamaximumconcentrationsestablishedbyUSEPA.BecauseDutchBillCreekisasalmonidstream,theMDELissetatthestricterlevelsrequiredforprotectionofsalmonids.

ThePermitteeprovidedaninfeasibilitystudydatedSeptember10,2012demonstratingthatitisinfeasibletoachieveimmediatecompliancewithfinaleffluentlimitationsforammonia.ACDOadoptedconcurrentlywiththisOrderincludesamaximumdailyinterimeffluentlimitationforammoniaof24mg/LbasedonexistingFacilityperformance.

b. Phosphorus.TheBasinPlancontainsanarrativewaterqualityobjectiveforbiostimulatorysubstancesthatstates“[w]atersshallnotcontainbiostimulatorysubstancesinconcentrationsthatpromoteaquaticgrowthstotheextentthatsuchgrowthscausenuisanceoradverselyaffectbeneficialuses.”TheRegionalWaterBoardisincreasinglyconcernedaboutthebiostimulatorypropertiesofdischargestosurfacewatersintheNorthCoastRegion.Nutrients,intreatedwastewater,suchasphosphorusandnitrogencontainingcompoundsstimulatebiologicalgrowth,therebydepletingdissolvedoxygenandadvancingeutrophicationofreceivingwaters.Atpresent,forinterpretationoftheBasinPlan’snarrativewaterqualityobjectiveforbiostimulatorysubstances,USEPAhasestablishedrecommendedwaterqualitycriteriafornutrientsinNutrientCriteriaDocumentsforLakesandRiversandNutrientCriteriaDocumentsforRiversandStreams.USEPAhasdefined14“ecoregions”andfurthercategorizedsurfacewatersaslakesandreservoirsorriversandstreamsforpurposesofdefiningapplicablenumericwaterqualitycriteriafornutrients.TheStateandRegionalWaterBoardscontinuetoexamineothermethodsofinterpretingtheBasinPlan’snarrativewaterqualityobjectiveforbiostimulatorysubstances.WhentheBoardsdeterminethatUSEPA’srecommendedcriteriaareappropriateforimplementing

theBasinPlanobjectives,orwhenamoreappropriateandmeaningfulmethodisestablished,theneedforlimitingnutrientsinrelationtobiostimulatoryproperties,includingphosphorusandnitrogen‐containingcompounds,inalldischargesintheRegionwillbereassessed.Inthemeantime,theRPAfornutrientsinrelationtobiostimulatoryproperties,performedfordevelopmentofthisOrder,isinconclusive.

TheOrderestablishesmonitoringrequirementsforphosphorusandnitrogen

containingcompoundsindischargesfromtheFacilitytoallowadeterminationof“reasonablepotential”atsuchtimeastheStateandRegionalWaterBoardsselectanappropriatemethodforinterpretationoftheBasinPlan’snarrativeobjective.ProvisionIV.C.2.coftheOrderalsoincludesaspecialreceivingwaterstudyrequirementtoassesstheeffectsofthedischargefromGraham’sPondonDutchBillCreek.Thestudywillneedtoassessbiostimulatoryeffectsofthedischarge.

ThePermitteesampleditseffluentdischargetoGraham’sPondforphosphorus45

timesbetweenOctober2008andJune2012.Monitoringresultsshowedphosphorusconcentrationsrangingbetween<1mg/Land9.8mg/L.Theaverageoftheresultsis5.5mg/Landthemaximumconcentrationof9.8mg/LoccurredinNovember2010.

c. PriorityPollutants

TheSIPestablishesprocedurestoimplementwaterqualitycriteriafromtheNTRandCTRandforpriority,toxicpollutantobjectivesestablishedintheBasinPlan.TheimplementationproceduresoftheSIPincludemethodstodeterminereasonablepotential(forpollutantstocauseorcontributetoexcursionsaboveStatewaterqualitystandards)andtoestablishnumericeffluentlimitations,ifnecessary,forthosepollutantsshowingreasonablepotential.

Section1.3oftheSIPrequirestheRegionalWaterBoardtouseallavailable,valid,relevant,andrepresentativereceivingwaterandeffluentdataandinformationtoconductanRPA.ForthisRPA,theRegionalWaterBoardhasusedeffluentandreceivingwatermonitoringdatageneratedfromfoursamplescollectedonNovember11,2002,February20,2003,September28,2008,andJanuary14,2009formostoftheCTRpollutants.AdditionaldatacollectedbythePermitteebetweenOctober2008andJune2012forlead,silver,zinc,DCBMandCDBM;betweenSeptember2008andDecember2011forcopper;andbetweenSeptember2008andMay2011forthallium,cyanide,andbis(2‐ethylhexyl)phthalatewasalsousedinconductingtheRPA.

HardnessTheCaliforniaToxicsRuleandtheNationalToxicsRulecontainwaterqualitycriteriaforsevenmetalsthatvaryasafunctionofhardness;thelowerthehardness,thelowerthewaterqualitycriteria.Thehardness‐dependentmetalcriteriaincludecadmium,copper,chromium(III),lead,nickel,silver,andzinc.

Effluentlimitationsforthedischargemustbesettoprotectthebeneficialusesofthereceivingwaterforalldischargeconditions.Effluentlimitationsmustbesetusingareasonableworst‐caseconditioninordertoprotectbeneficialusesforalldischargeconditions.TheSIPdoesnotaddresshowtodeterminehardnessforapplicationtotheequationsfortheprotectionofaquaticlifewhenusinghardness‐dependentmetalscriteria.Itsimplystates,inSection1.2,thatthecriteriashallbeproperlyadjustedforhardnessusingthehardnessofthereceivingwater.TheCTRrequiresthat,forwaterswithahardnessof400mg/L(asCaCO3),orless,theactualambienthardnessofthesurfacewatermustbeused.Itfurtherrequiresthatthehardnessvaluesusedmustbeconsistentwiththedesigndischargeconditionsfordesignflowsandmixingzones(See40CFR131.38(c)(4)(i)).TheCTRdoesnotdefinewhethertheterm“ambient”,asappliedintheregulations,necessarilyrequirestheconsiderationoftheupstreamasopposedtodownstreamhardnessconditions.

StateWaterBoardOrderNo.WQ‐2008‐0008(CityofDavis)furtherinterpretedtheSIPbystating“…theregionalwaterboardshaveconsiderablediscretionintheselectionofhardness.Regardlessofwhichmethodisusedfordetermininghardness,theselectionmustbeprotectiveofwaterqualitycriteria,giventheflowconditionsunderwhichaparticularhardnessexists….Regardlessofthehardnessused,theresultinglimitsmustalwaysbeprotectiveofwaterqualityunderallflowconditions.”Thepointinthereceivingwateraffectedbythedischargeisdownstreamofthedischarge.Astheeffluentmixeswiththereceivingwater,thehardnessofthereceivingwatercanchange.Therefore,wherereliable,representativedataareavailable,itisappropriatetousetheambienthardnessdownstreamofthedischargethatisamixtureoftheeffluentandreceivingwaterforthedeterminationoftheCTRhardness‐dependentmetalscriteria.

A2006Study(Emerick,R.W.;Booroum,Y.;&Pedri,J.E.,2006.CaliforniaandNationalToxicsRuleImplementationandDevelopmentofProtectiveHardnessBasedMetalEffluentLimitations,WEFTEC,Chicago,Ill.)demonstratesthatusingthelowestrecordedreceivingwaterhardnessforestablishingwaterqualitycriteriaisnotalwaysprotectiveofthereceivingwaterundervariousmixingconditions(e.g.,whentheeffluenthardnessislessthanthereceivingwaterhardness).

The2006studyevaluatedtherelationshipsbetweenhardnessandtheCTRmetalscriterionthatiscalculatedusingtheCTRmetalsequation.Theequationdescribingthetotalrecoverableregulatorycriterion,asestablishedintheCTR,isasfollows:

CTRCriterion=WERx(em[ln(H)]+b)(Equation1)

Where:

WER=watereffectratio H=Hardness b=metal‐andcriterion‐specificconstant m=metal‐andcriterion‐specificconstant

InaccordancewiththeCTR,thedefaultvaluefortheWERis1.Adischarger‐specificWERstudymustbeconductedinordertouseaWERvalueotherthan1.Theconstants“m”and“b”arespecifictoboththemetalunderconsideration,andthetypeoftotalrecoverablecriterion(i.e.,acuteorchronic).Themetal‐specificvaluesfortheseconstantsareprovidedintheCTRatparagraph(b)(2),Table1.TherelationshipbetweenhardnessandtheresultingcriterioninEquation1canexhibiteitheradownward–facing(i.e.,concavedownward)oranupward‐facing(i.e.,concaveupward)curvedependingonthevaluesofthecriterion‐specificconstants.Thecurveshapesforacuteandchroniccriteriaforthemetalsareasfollows:ConcaveDownwardMetals:acuteandchronicchromium(III),copper,nickel,andzinc;andchroniccadmium.Forthosecontaminantswheretheregulatorycriteriaexhibitaconcavedownwardrelationshipasafunctionofhardness,anymixtureofreceivingwaterthatiscompliantwithwaterqualityobjectivesforthatmetalandeffluentthatiscompliantwithwaterqualityobjectivesforthatmetalwillalwaysresultinamixturethatiscompliantwithwaterqualityobjectivesanduseofthelowestrecordedeffluenthardnessforestablishmentofwaterqualityobjectivesisfullyprotectiveofallbeneficialusesregardlessofwhethertheeffluentorreceivingwaterhardnessishigher.Useofthelowestrecordedeffluenthardnessisalsoprotectiveunderallpossiblemixingconditionsbetweentheeffluentandthereceivingwater(i.e.,fromhighdilutiontonodilution).BecausetheOrderrequirescompliancewitheffluentlimitationsattheendofthedischargepipe,effluenthardnessisanappropriateandprotectivehardnesstouse

inadjustingthewaterqualitycriteriafortheconcavedownwardmetals.Thereasonableworst‐caseambienthardnesscanbeestimatedbyusingthelowesteffluenthardness.Copperistheonlyconcave‐downwardmetalthatexhibitsreasonablepotential.ThewaterqualitycriteriaforcopperwascalculatedforthisOrderusingEquation1andareportedminimumeffluenthardnessof54mg/LasCaCO3,basedon46effluenthardnessmeasurementsobtainedbythePermitteebetweenOctober2008andJune2012.Themaximumeffluenthardnessmeasurementduringthattimeperiodwas244mg/Landtheaverageofthe46measurementswas141mg/L.ConcaveUpwardMetals:cadmium(acute),lead,andsilver(acute).

ForConcaveUpwardMetals,the2006Studydemonstratesthatduetoadifferentrelationshipbetweenhardnessandthemetalscriteria,theeffluentandupstreamreceivingwatercanbeincompliancewiththeCTRcriteria,buttheresultingmixturemaybeoutofcompliance.The2006StudyprovidesamathematicalapproachtocalculatethefinaleffluentlimitationsforConcaveUpwardMetalsthatisprotectiveofaquaticlifeinallareasofthereceivingwateraffectedbythedischarge,underalldischargeandreceivingwaterflow(seeEquation2,below).

Tobeconsistentwiththismethodology,thereasonableworst‐caseupstreamreceivingwaterhardness,thelowestobservedeffluenthardness,andassumingnoreceivingwaterassimilativecapacityformetals(i.e.,ambientbackgroundmetalsconcentrationsareattheirrespectiveCTRcriterion),wasusedinEquation4fordeterminingwhetherreasonablepotentialexistsfortheConcaveUpwardhardness‐basedmetals.Equation2isnotusedinplaceoftheCTRequation(Equation1).Rather,Equation2,whichisderivedusingtheCTRequation,isusedasadirectapproachforcalculatingtheECA.TheCTRequationhasbeenusedtoevaluatethereceivingwaterdownstreamofthedischargeatalldischargeandflowconditionstoensuretheECAisprotective.

Where:

m,b = criterionspecificconstants(fromCTR)He = lowestobservedeffluenthardnessHrw = reasonableworst‐caseupstreamreceivingwaterhardness

Thelowesteffluenthardnessis54mg/LasCaCO3,whilethereceivingwaterhardnessofGraham’sPond,awateroftheUS,rangedfrom10mg/Lto168mg/L

b)ln(Hm

bHlnmrwe rw

eH - Hm

Allowance

ionConcentrat

Effluent

(Equation 4)

(Equation 2)

asCaCO3betweenOctober2008June2012.Graham’sPondcontainsamixtureofstormwateranddisinfectedsecondaryeffluent.Duringthattimeperiod,Graham’sPondhardnesswasmeasured68timesbetweenOctober2008andApril2012:theaverageofthemeasurementsis92.5mg/Landthemedianis84mg/L.ThelowestGraham’sPondhardnessoccurredonetimeduringextremelywetweather,therefore,thereceivingwaterhardnesstouseinEquation2tocalculatetheECAis44ug/L(thesecondlowestreceivingwaterhardnessmeasured).UsingtheproceduresdiscussedabovetocalculatetheECAforallConcaveUpMetalswillresultinWQBELsthatareprotectiveunderallpotentialeffluentreceivingwaterconditions(highflowtolowflow)andunderallknownhardnessconditions.

ToconducttheRPA,RegionalWaterBoardstaffidentifiedthemaximumeffluentconcentration(MEC)andmaximumbackground(B)concentrationforeachpriority,toxicpollutantfromeffluentandreceivingwaterdataprovidedbythePermittee,andcomparedthisinformationtothemoststringentapplicablewaterqualitycriterion(C)foreachpollutantwithapplicablewaterqualitycriteriafromtheNTR,CTR,andtheBasinPlan.Section1.3oftheSIPestablishesthreetriggersforafindingofreasonablepotential.

Trigger1.IftheMECisgreaterthanC,thereisreasonablepotential,andaneffluentlimitationisrequired.

Trigger2.IfBisgreaterthanC,andthepollutantisdetectedineffluent(MEC>ND),thereisreasonablepotential,andaneffluentlimitationisrequired.

Trigger3.Afterareviewofotheravailableandrelevantinformation,apermitwritermaydecidethataWQBELisrequired.Suchadditionalinformationmayinclude,butisnotlimitedto:thefacilitytype,thedischargetype,solidsloadinganalyses,lackofdilution,historyofcomplianceproblems,potentialtoxicimpactofthedischarge,fishtissueresiduedata,waterqualityandbeneficialusesofthereceivingwater,CWA303(d)listingforthepollutant,andthepresenceofendangeredorthreatenedspeciesortheircriticalhabitat.

ReasonablePotentialDetermination

TheRPAdemonstratedreasonablepotentialfordischargesfromtheFacilitytocauseorcontributetoexceedancesofapplicablewaterqualitycriteriaforcopper,lead,silver,cyanide,DCBM,CDBM,bis(2‐ethylhexyl)phthalate,andammonia.Reasonablepotentialcouldnotbedeterminedforallpollutants,astherearenotapplicablewaterqualitycriteriaforallpollutants.TheRPAdeterminedthatthereiseithernoreasonablepotentialortherewasinsufficientinformationtoconcludeaffirmativereasonablepotentialfortheremainderofthe126prioritypollutants.

ThefollowingtablesummarizestheRPAforeachprioritypollutantthatwasreportedindetectableconcentrationsintheeffluentorthereceivingwater(detectedvaluesareindicatedinboldtype).TheMECs,moststringentwaterqualityobjectives/waterqualitycriteria(WQO/WQC),andbackgroundconcentrations(B)usedintheRPAarepresented,alongwiththeRPAresults(YesorNoandwhichtrigger)foreachtoxicpollutantanalyzed.Nootherpollutantswithapplicable,numericwaterqualitycriteriafromtheNTR,CTR,andtheBasinPlanweremeasuredabovedetectableconcentrationsduringthemonitoringeventsconductedbythePermittee.AttachmentF‐1tothisOrdersummarizestheRPAforall126prioritypollutants.

TableF‐9. SummaryofReasonablePotentialAnalysisResults

CTR# PriorityPollutants

CorMostStringentWQO/WQC(µg/L)

MECorMinimumDL(µg/L)1

BorMinimumDL(µg/L)1

RPAResults2

2 Arsenic 10 0.98 ‐‐‐ No5a ChromiumIII3 125 1.8 ‐‐‐ No6 Copper3 5.5 83 ‐‐‐ Yes(Trigger1)7 Lead4 1.1 5.5 ‐‐‐ Yes(Trigger1)8 Mercury 0.050 0.0311 ‐‐‐ No9 Nickel3 31 6.5 ‐‐‐ No11 Silver4 1.0 5.6 ‐‐‐ Yes(Trigger1)12 Thallium 1.7 1.5 ‐‐‐ No13 Zinc3 71 30 ‐‐‐ No14 Cyanide 5.2 9.2 ‐‐‐ Yes(Trigger1)5

23 Chlorodibromomethane 0.41 1.17 ‐‐‐ Yes(Trigger1)26 Chloroform ‐‐‐ 30 ‐‐‐ Ud(NoCriteria)27 Dichlorobromomethane 0.56 5.75 ‐‐‐ Yes(Trigger1)39 Toluene 150 6.8 ‐‐‐ No68 Bis(2‐Ethylhexyl)Phthalate 1.8 5.5 ‐‐‐ Yes(Trigger1)81 Di‐n‐butylPhthalate 2,700 4.2 ‐‐‐ No‐‐ TotalTrihalomethanes6 80 36 ‐‐‐ No‐‐ Ammonia 2140 24000 ‐‐‐ Yes(Trigger1)‐‐ Nitrate(asN) 10,000 5800 ‐‐‐ BPJ

TableNotes:

1. TheMaximumEffluentConcentration(MEC)ormaximumbackgroundconcentration(B)istheactualdetectedconcentrationunlessitisprecededby“<”,inwhichcasethevalueshownistheminimumdetectionlevelastheanalyticalresultwasreportedasnotdetected(ND).

2. RPAResults: =Yes,ifMEC>WQO/WQC,orB>WQO/WQCandMECisdetected;

CTR# PriorityPollutants

CorMostStringentWQO/WQC(µg/L)

MECorMinimumDL(µg/L)1

BorMinimumDL(µg/L)1

RPAResults2

=No,ifMECandBare<WQO/WQCoralleffluentdataareundetected; =Undetermined(Ud) =BestProfessionalJudgment(BPJ)3. WaterQualityCriteriaforchromiumIII,copper,nickel,andzincarebasedonanthelowestdetectedeffluenthardnessconcentrationof54mg/Landhavebeenconverted

tototalrecoverablemetalfractionusingconversionfactorsintheCTRandadefaultwatereffectratioof1.

4. WaterQualityCriteriaforthehardness‐basedmetalsleadandsilverarebasedonthereasonablelowestdetectedreceivingwater(Graham’sPond)hardnessconcentration

of44mg/LandhavebeenconvertedtototalrecoverablemetalfractionusingtheconversionfactorsintheCTR.

5. AlthoughtheMECforcyanideexceededthemoststringentwaterqualityobjectiveof5.2ug/L,the13othersampleswerelessthan5.2ug/L.Inlieuofestablishingan

effluentlimitationforcyanide,theMRPrequiresadditionalmonitoringtocollectenoughdatatodeterminewhetherornotreasonablepotentialexistsforcyanide.

6. TotalTrihalomethanesmeansthesumofthetrihalomethanecompoundsdichlorobromomethane,chloroform,chlorodibromomethane,andbromoform(CCR,title22,

section64401.92).

Additionaldetailsregardingeachofconstituentsforwhichreasonablepotentialwasfoundareincludedinthefollowingparagraphs.

Copper.TheCTRestablishesbothaquaticlifeandhumanhealthwaterqualityobjectivesforcopper.EffluentmonitoringdatasubmittedbythePermitteebetweenSeptember2008andDecember2011revealedconcentrationsoftotalrecoverablecopperrangingfrom7.3ug/Lto470ug/Lin48samples.Theresultof470ug/Lappearstobeanoutlier.Adeterminationofreasonablepotentialhasbeenmadebasedonthemaximumeffluentconcentrationof83ug/Lexceedingthemoststringentwaterqualityobjectiveforprotectionofaquaticlifeof5.5ug/Lcalculatedbasedontheminimumeffluenthardnessconcentrationof54mg/L.All48effluentsamplesexceededthemoststringent(chronic)waterqualityobjectiveof5.5ug/Land46ofthe48samplesexceededtheacuteobjectiveforprotectionofaquaticlifeof7.8ug/L.Thereisnoreasonablepotentialtoexceedthewaterqualitycriteriaof1300ug/Lforprotectionofhumanhealth.

Lead.TheCTRestablishesonlyaquaticlifewaterqualityobjectivesforlead.EffluentmonitoringdatasubmittedbythePermitteebetweenSeptember2008andJune2012revealedconcentrationsoftotalrecoverableleadrangingfrom<0.6ug/Lto5.5ug/Lin52samples.Adeterminationofreasonablepotentialhasbeenmadebasedonthemaximumeffluentconcentrationof5.5ug/Lexceedingthemoststringentwaterqualityobjectiveof1.1ug/Lcalculatedbasedonthereasonablelowestreceivingwater(Graham’sPond)hardnessof44mg/L.Twelvesampleresultswere<0.6ug/L.Twenty‐fourresultsexceededthemoststringent(chronic)waterqualityobjectiveof1.1ug/Landnoresultsexceededtheacutewaterqualityobjectiveof35.5ug/L

Silver.TheCTRestablishesonlyanacutewaterqualityobjectiveforprotectionofaquaticlifeforsilver.EffluentmonitoringdatasubmittedbythePermittee

betweenSeptember2008andJune2012revealedconcentrationsoftotalrecoverablesilverrangingfrom<0.6ug/Lto5.6ug/Lin52samples.Adeterminationofreasonablepotentialhasbeenmadebasedonthemaximumeffluentconcentrationof5.6ug/Lexceedingthemoststringentwaterqualityobjectiveof1.0ug/Lcalculatedbasedonthereasonableminimumreceivingwater(Graham’sPond)hardnessof44mg/L.Minimumdetectionlimitsrangingfrom0.6ug/Lto2ug/Lwereusedforanalyzingsamplesforsilver,andthereare22sampleresultsthatcannotbeassessedtodetermineifsilverwaspresentaboveorbelow1.0ug/L.Sixofthesevenresultswithdetectionsabovethedetectionlimitexceededthemoststringent(acute)waterqualityobjectiveof1.0ug/L.Thereisnochronicwaterqualityobjectiveforsilver.

Dichlorobromomethane(DCBM).DCBMisacomponentofagroupofchemicals,commonlyknownastrihalomethanes(THMs),whichareformedduringthedisinfectionprocessfordrinkingwaterandwastewatertreatmentthroughthereactionofchlorineandorganicandinorganicmaterial.OtherTHMsincludechloroform,bromoform,andchlorodibromomethane.THMsarehumancarcinogens.TheCTRcriterionforDCBMtoprotecthumanhealthfordrinkingwatersources(consumptionofwaterandaquaticorganisms)is0.56ug/L.

TheCTRestablishesonlyawaterqualityobjectiveforprotectionofhumanhealth.EffluentmonitoringdatasubmittedbythePermitteebetweenSeptember2008andJune2012revealedconcentrationsofDCBMrangingfrom<0.48ug/Lto5.75ug/Lin47samples.Adeterminationofreasonablepotentialhasbeenmadebasedonthemaximumeffluentconcentrationof5.75ug/Lexceedingthemoststringentwaterqualityobjectiveof0.56ug/L.Thirteensampleswerenon‐detectatmethoddetectionlimitsrangingfrom0.48ug/Lto4.8ug/L.Alloftheremainingsamplesexceededthemoststringentwaterqualityobjectiveof0.56ug/Lforprotectionofhumanhealth.

Chlorodibromomethane(CDBM).CDBMwassampled47timesbetweenSeptember2008andJune2012.Sampleswereanalyzedusingdetectionlimitsbetween0.08and4.7ug/L.CDBMwasdetectedonetimeataconcentrationof1.17ug/L,whichisgreaterthanthewaterqualityobjectiveof0.41ug/L,thereforeafindingofreasonablepotentialforCDBMismade.Onlyfiveofthesamplesuseddetectionlimitsgreaterthan0.4ug/Land41sampleswerebelowthewaterqualityobjectiveof0.41ug/L.SincethisFacilityuseschlorinefordisinfection,itisimportanttothatallfuturemonitoringdataforCDBMbeanalyzedutilizinganalyticalmethodswithdetectionlimitslessthan0.4ug/LinordertodemonstratecompliancewiththeCDBMeffluentlimitations

Bis(2‐Ethylhexyl)Phthalate.TheCTRestablishesonlyawaterqualityobjectiveforprotectionofhumanhealthforbis(2‐ethylhexyl)phthalate.EffluentmonitoringdatasubmittedbythePermitteebetweenSeptember2008andMay2011revealedconcentrationsofbis(2‐ethylhexyl)phthalaterangingfrom<0.83ug/Lto5.5ug/Lin14samples.Adeterminationofreasonablepotentialhasbeenmadebasedonthemaximumeffluentconcentrationof5.5ug/Lexceedingthemoststringentwaterqualityobjectiveof1.8ug/L.Sixsamplesexceededthisobjective,whiletheremaining8sampleswerenon‐detectatadetectionlimitof0.83ug/L.

Additionaldetailsregardingseveralconstituentswithregardtochangesinmonitoringstatusareincludedinthefollowingparagraphs:

Mercury.Threesampleswereanalyzedformercury(February2003,September2008,January2009)withresultsrangingfrom0.0153ug/Lto0.0311ug/L.Theolder2003datawasusedforthisRPAduetothelimiteddataset.Duetothefactthattheseresultsareclosetothemoststringentwaterqualityobjectiveforprotectionofhumanhealthof0.05ug/L,themonitoringandreportingprogramincludesmonitoringrequirementsformercury.

Cyanide.TheCTRestablishesbothaquaticlifeandhumanhealthwaterqualityobjectivesforcyanide.EffluentmonitoringdatasubmittedbythePermitteebetweenSeptember2008andMay2011revealedconcentrationsofcyaniderangingfrom<2ug/Lto9.2ug/Lin14samples.Onlyonesampleexceededthemoststringentwaterqualityobjectiveof5.2ug/Landnosamplesexceededtheacuteeffluentlimitof22ug/L.Elevenofthe14resultswerenon‐detectatmethoddetectionlimitsrangingfrom2ug/Lto4.8ug/Landonesamplewasdetectedbetweenthemethoddetectionlimitof2ug/Landreportinglimitof5ug/L.Basedonthesefindings,effluentlimitationshavenotbeenestablishedforcyanide,butmonthlymonitoringforcyanidehasbeenestablishedtogatheradditionaldatatodeterminewhetherornotreasonablepotentialexistsforcyanide.Inaddition,thePermitteehasproposedtoinvestigatethemodificationofanalyticalmethodsandsamplepreservationtechniquestodetermineifthesearecreatingfalsepositiveresultsforcyanide.

Thallium.FourteensampleswereanalyzedforthalliumbetweenSeptember2008andMay2011withresultsrangingfrom<0.3ug/Lto1.5ug/L.Thalliumwasonlydetectedabovethedetectionlimitinsixsamples,withfiveofthesamplesintherangeof0.35to0.47ug/L.Althoughonesamplewasdetectedclosetothewaterqualityobjective,thefactthatthe13othersampleswerewellbelowthedetectionlimitestablishesafindingofnoreasonablepotentialforthallium.

Zinc.TheCTRestablishesonlyaquaticlifewaterqualityobjectivesforzinc.EffluentmonitoringdatasubmittedbythePermitteebetweenSeptember2008andJune2012revealedconcentrationsoftotalrecoverablezincrangingfrom5.7ug/Lto30ug/Lin48samples.Adeterminationofnoreasonablepotentialhasbeenmadebasedonthemaximumeffluentconcentrationof30ug/Lbeinglessthanthemoststringentwaterqualityobjectiveof71ug/Lcalculatedbasedoneffluenthardnessof54mg/L.ThemonitoringrequirementforzincisnotincludedinthisOrderduetothefindingofnoreasonablepotential.

Chloroform.Chloroformwassampled47timesbetweenSeptember2008andJune2012,withresultsrangingbetween9.2ug/Land63.8ug/L.SincethisFacilityuseschlorinefordisinfection,itisimportanttorequireon‐goingmonitoringforchloroformtoensurethatthechlorinationprocessisoperatedinamannerthatdoesnotgeneratetotaltrihalomethanes(combinationofDCBM,CDBM,chloroform,andbromoform)atconcentrationsthatwouldexceedthetitle22maximumcontaminantlevelof80ug/L.

4. WQBELCalculations

FinalWQBELsforcopper,lead,silver,DCBM,CDBM,andbis(2‐ethylhexyl)phthalatehavebeendeterminedusingthemethodsdescribedinSection1.4oftheSIP.

Step1:Foreachprioritypollutantthatdemonstratereasonablepotential,identifytheapplicablewaterqualitycriterion/objectivesforthepollutant(s),andadjustthecriterionorobjective,ifapplicable.ThisstepisdescribedinsectionsIV.C.3.bandIV.C.3.c,above.

Step2:Tocalculatetheeffluentlimits,aneffluentconcentrationallowance(ECA)iscalculatedforeachpollutantfoundtohavereasonablepotentialusingthefollowingequation,whichtakesintoaccountdilutionandbackgroundconcentrations:

ECA=C+D(C–B),where

C=theapplicablewaterqualitycriterion(adjustedforreceivingwaterhardnessandexpressedasthetotalrecoverablemetal,ifnecessary)

D=thedilutioncredit(hereD=0,asthedischargedoesnotqualifyforadilutioncredit)

B=thebackgroundconcentration

Becausenocreditfordilutionisbeingallowed,D=0,andtheECAisequaltotheapplicablecriterion(ECA=C).

Step3:ForeachECAbasedonanaquaticlifecriterion/objective(i.e.,copper,lead,and,silver),thelongtermaveragedischargecondition(LTA)isdeterminedbymultiplyingtheECAbyafactor(multiplier),whichadjuststheECAtoaccountforeffluentvariability.Themultiplierdependsonthecoefficientofvariation(CV)ofthedatasetandwhetheritisanacuteorchroniccriterion/objective.Table1oftheSIPprovidespre‐calculatedvaluesforthemultipliersbasedonthevaluesoftheCV.Whenthedatasetcontainslessthan10sampleresults,orwhen80percentormoreofthedatasetisreportedasnon‐detect(ND),theCVissetequalto0.6.Derivationofthemultipliersispresentedinsection1.4oftheSIP.

FromTable1oftheSIP,theacuteandchronicECAmultipliersforcalculatingLTAsatthe99thpercentileoccurrenceprobabilityforcopper,lead,andsilverareshowninthetablebelow.TheLTAsaredeterminedasfollows.

TableF‐10. DeterminationofLongTermAverages

PollutantECA ECAMultiplier LTA(µg/L)

Acute Chronic Acute Chronic Acute ChronicCopper 7.8 5.5 0.11 0.19 0.86 1.02Lead 21.5 0.84 0.26 0.45 5.56 0.38Silver 1.0 ‐‐‐ 0.32 ‐‐‐ 0.32 ‐‐‐

Step4:WQBELs,includinganaveragemonthlyeffluentlimitation(AMEL)andamaximumdailyeffluentlimitation(MDEL)arecalculatedusingthemostlimiting(lowest)LTA.TheLTAismultipliedbyafactorthataccountsforaveragingperiodsandexceedancefrequenciesoftheeffluentlimitations,andfortheAMEL,theeffluentmonitoringfrequency.HerethecalculatedCVforcopperis0.7andforleadis0.70.TheCVforsilverissettothedefaultCVof0.60.Thesamplingfrequencyforallthreepollutantsissetequalto4(n=4).The99thpercentileoccurrenceprobabilitywasusedtodeterminetheMDELmultiplieranda95thpercentileoccurrenceprobabilitywasusedtodeterminetheAMELmultiplier.

FromTable2oftheSIP,theMDELmultipliersandtheAMELmultipliersweredeterminedasshowninthetablebelow.FinalWQBELsforcopper,lead,andsilveraredeterminedasfollows.

TableF‐11. DeterminationofFinalWQBELsBasedonAquaticLifeCriteria

Pollutant LTA(µg/L)

MDELMultiplier

AMELMultiplier

MDEL(µg/L)

AMEL(µg/L)

Copper 0.86 9.14 2.92 7.8 3.6Lead 0.38 3.87 1.72 1.5 0.65Silver 0.32 3.11 1.55 1.0 0.5

Thefinaleffluentlimitspresentedaboveforcopperarebasedonaneffluenthardnessof54mg/L.Thefinaleffluentlimitspresentedaboveforleadandsilverarebasedonareceivingwater(Graham’sPond)hardnessof44mg/L.Allthreemetaleffluentlimitationswerecalculatedusingadefaultdissolved‐to‐totalmetaltranslatorstoconvertwaterqualityobjectivesfromdissolvedtototalrecoverable.

Step5:Whenthemoststringentwaterqualitycriterion/objectiveisahumanhealthcriterion/objective(asforDCBM,CDBM,andbis(2‐ethylhexylphthalate)),theAMELissetequaltotheECA.FromTable2oftheSIPforDCBM,whenCV=0.84andn=4,theMDELmultiplieratthe99thpercentileoccurrenceprobabilityequals4.19,andtheAMELmultiplieratthe95thpercentileoccurrenceprobabilityequals1.79.ForCDBM,whenCV=0.6andn=4,theMDELmultiplieratthe99thpercentileoccurrenceprobability=3.11,andtheAMELmultiplieratthe95thpercentileprobability=1.55,andforbis(2‐ethylhexyl)phthalate,whenCV=0.99andn=4,theMDELmultiplieratthe99thpercentileoccurrenceprobabilityequals4.86,andtheAMELmultiplieratthe95thpercentileoccurrencelevelequals1.94.TheMDELforprotectionofhumanhealthiscalculatedbymultiplyingtheECAbytheratiooftheMDELmultipliertotheAMELmultiplier.FinalWQBELsforDCBM,CDBM,andBis(2‐EthylHexyl)Phthalatearedeterminedasfollows:

TableF‐12. DeterminationFinalWQBELsBasedonHumanHealthCriteria

Pollutant Units ECA MDEL/AMEL MDEL AMELDichlorobromomethane µg/L 0.56 2.34 1.3 0.56Chlorodibromomethane µg/L 0.41 2.01 0.8 0.41Bis(2‐EthylHexyl)

Phthalateµg/L 1.8 2.51 4.5 1.8

5. WholeEffluentToxicity(WET)

Effluentlimitationsforwholeeffluentacuteandmonitoringtriggersforchronictoxicity,protectthereceivingwaterfromtheaggregateeffectofamixtureofpollutantsthatmaybepresentineffluent.TherearetwotypesofWETtests–acuteandchronic.Anacutetoxicitytestisconductedoverashorttimeperiodandmeasuresmortality.Achronictestisconductedoveralongerperiodoftimeandmaymeasuremortality,reproduction,and/orgrowth.

WETrequirementsarederivedfromtheCWAandtheBasinPlan.TheBasinPlanestablishesanarrativewaterqualityobjectivefortoxicitythatstates“Allwatersshallbemaintainedfreeoftoxicsubstancesinconcentrationsthataretoxicto,orthatproducedetrimentalphysiologicalresponsesinhuman,plant,oraquaticlife.”Detrimentalresponsesmayinclude,butarenotlimitedto,decreasedgrowthrate,decreasedreproductivesuccessofresidentorindicatorspecies,and/orsignificant

alterationsinpopulation,communityecology,orreceivingwaterbiota.ForcompliancewiththeBasinPlan’snarrativetoxicityobjective,thisOrderrequiresthePermitteetoconductWETtestingforacuteandchronictoxicity,asspecifiedintheMRP(AttachmentE,sectionV).

TheBasinPlanstates“…effluentlimitsbaseduponacutebioassaysofeffluentwillbeprescribed.”USEPARegion9providedguidanceforthedevelopmentofacutetoxicityeffluentlimitationsintheabsenceofnumericwaterqualityobjectivesfortoxicityinitsdocumenttitled“GuidanceforNPDESPermitIssuance”,datedFebruary1994.InsectionB.2“ToxicityRequirements”,theUSEPAdocumentstatesthat,“Intheabsenceofspecificnumericwaterqualityobjectivesforacuteandchronictoxicity,thenarrativecriterion,‘notoxicsintoxicamounts’,applies.Achievementofthenarrativecriterion,asappliedherein,meansthatambientwatersshallnotdemonstrateforacutetoxicity:1)lessthan90percentsurvival,50percentofthetime,basedonthemonthlymedian,or2)lessthan70percentsurvival,10percentofthetime,basedonanymonthlymedian.”

NotificationrequirementsforacuteandchronicWETtestingincludea72hourverbalnotificationrequirementanda14daywrittenreportrequirement,iftestresultsindicatetoxicity.The14daywrittennotificationisestablishedintheUSEPAWETGuidancedocumentscitedintheMRP.The72hourverbalnotificationrequirementisbeingaddedtoprovidetheRegionalWaterBoardwithknowledgeofthetoxicityinadvanceofthewrittenreport.The72hourrequirementisintendedtogivethePermitteesufficienttimetomakeatelephonecalltoRegionalWaterBoardstaffandaccountsfornon‐workingdays(e.g.,weekends).VerbalnotificationofWETtestexceedancesmaybeleftbyvoicemailiftheRegionalWaterBoardstaffpersonisnotimmediatelyavailablebytelephone.

a. AcuteAquaticToxicity

ConsistentwithOrderNo.93‐42,thisOrderincludesaneffluentlimitationforacutetoxicityinaccordancewiththeBasinPlan,whichrequiresthattheaveragesurvivaloftestorganismsinundilutedeffluentforanythreeconsecutive96‐hourbioassaytestsbeatleast90percent,withnosingletesthavinglessthan70percentsurvival.

TheOrderalsoimplementsfederalguidelines(Regions9and10GuidelinesforImplementingWholeEffluentToxicityTestingPrograms)byrequiringdischargerstoconductacutetoxicitytestsonafishspeciesandonaninvertebratetodeterminethemostsensitivespecies.AccordingtotheUSEPAmanual,MethodsforEstimatingtheAcuteToxicityofEffluentsandReceivingWaterstoFreshwaterandMarineOrganisms(EPA/600/4‐90/‐27F),theacceptablevertebratespeciesfortheacutetoxicitytestarethefatheadminnow,Pimephalespromelasandthe

rainbowtrout,Oncorhynchusmykiss.Theacceptableinvertebratespeciesfortheacutetoxicitytestarethewaterflea,Ceriodaphniadubia,Daphniamagna,andD.pulex.ThePermitteetestsitseffluentforacutetoxicityusingtherainbowtrout,Oncorhynchusmykiss.Thisrequirementfortwo‐speciestestingwasnotincludedinthepreviouspermit.

SinceJanuary2000,thePermitteeviolatedtheacutetoxicityeffluentlimitations20times,withviolationsrangingfrom0to60percentsurvival.WhenthePermitteediscoversaviolationoftheacutetoxicityeffluentlimitation,itconductsadditionalmonitoring,generallyonaweeklybasistoidentifywhetherornotthetoxicityispersistent.ThePermitteehasnotconductedatoxicityreductionevaluationortoxicityidentificationevaluationtoidentifythesourceofthetoxicity.Highammoniaintheeffluentisalikelycause,butsporadicdischargesofprioritypollutantssuchascopper,lead,silver,andDCBM,andCDBMareotherpossiblecausesoftoxicity.ThePermitteesubmittedaToxicityReductionEvaluationworkplanonJanuary15,2009,andtheMRPofthisOrderrequiresthePermitteetoconductacceleratedmonitoringandinvestigatecausesofidentifiedtoxicity.

b. ChronicAquaticToxicity

TheSIPrequirestheuseofshort‐termchronictoxicityteststodeterminecompliancewiththenarrativetoxicityobjectivesforaquaticlifeintheBasinPlan.TheSIPrequiresthatthePermitteedemonstratethepresenceorabsenceofchronictoxicityusingtestsonthefatheadminnow,Pimephalespromelas,thewaterflea,Ceriodaphniadubia,andthefreshwateralga,Selenastrumcapricornutum.InaccordancewiththeSIP,thePermitteewillberequiredtoconductchronictoxicitytestinginordertodeterminereasonablepotentialandestablishWQBELsasnecessary

ToensurecompliancewiththenarrativeeffluentlimitationandtheBasinPlan’snarrativetoxicityobjective,thePermitteeisrequiredtoconductchronicWETtesting,asspecifiedintheMonitoringandReportingProgram(AttachmentE,sectionV).Furthermore,SpecialProvisionIV.C.2.aofthisOrderrequiresthePermitteetoinvestigatethecausesof,andidentifyandimplementcorrectiveactionstoreduceoreliminateeffluenttoxicity.Ifthedischargedemonstratesapatternoftoxicityexceedingthenumerictoxicitymonitoringtrigger,thePermitteeisrequiredtoinitiateaToxicityReductionEvaluation(TRE)inaccordancewithanapprovedTREworkplan.Thenumerictoxicitymonitoringtriggerisnotaneffluentlimitation;itisthetoxicitythresholdatwhichthePermitteeisrequiredtoperformacceleratedchronictoxicitymonitoring,aswell

asthethresholdtoinitiateaTREifapatternofeffluenttoxicityhasbeendemonstrated.

SectionV.B.9oftheMRPdefinesthechronictoxicitymonitoringtriggerasasinglesampleresultof1.6TUcandamonthlymedianof1.0TUc,andsectionV.C.1.goftheMRPrequiresTUctobecalculatedas100/NOECforpurposesofdeterminingifthePermittee’seffluentexceedsthechronictoxicitymonitoringtrigger.AlthoughthefederalrequirementsmayprovideforflexibilityindetermininghowtocalculateTUcforcompliancepurposes(e.g.,100/NOEC,100/IC25,100/EC25),USEPARegion9recommendsthateffluentlimitationsandtriggersbebasedonthenoobservedeffectconcentration(NOEC)whenthepermitlanguageandchronictoxicitytestingmethodsincorporateimportantsafeguardsthatimprovethereliabilityoftheNOEC.Thesesafeguardsincludetheuseofadilutionseries(testingofaseriesofeffluentconcentrations)toverifyandquantifyadose‐responserelationshipandarequirementtoevaluatespecificperformancecriteriainordertodeterminethesensitivityofeachchronictoxicitytest.Thegoalistodemonstratethateachtestissensitiveenoughtodeterminewhetherornottheeffluentistoxicornot.

Theuseof100/IC25or100/EC25asmethodsforcalculatingchronictoxicityarepointestimatesthatautomaticallyallowfora25percenteffectbeforecallinganeffluenttoxic.TheBasinPlanhasanarrativeobjectivefortoxicitythatrequiresthat“allwatersbemaintainedfreeoftoxicsubstancesinconcentrationsthataretoxicto,orthatproducedetrimentalphysiologicalresponsesinhuman,plant,animal,oraquaticlife.”Allowanceofapossible25percenteffectwouldnotmeettheBasinPlan’snarrativetoxicityrequirement.Inaddition,CaliforniahashistoricallyusedtheNOECtoregulatechronictoxicityforoceandischarges,thusitisfittingthatthesamemethodbeusedtoregulatechronictoxicityininlandsurfacewaterdischarges.

Becausenodilutionhasbeengrantedforthechroniccondition,chronictoxicitytestingresultsexceeding1.6chronictoxicityunit(TUc)asasinglesampleresultand1.0TUcasamonthlymediandemonstratesthatthedischargeisinviolationofthenarrativetoxicitywaterqualityobjective.

Ifacceleratedsamplingofthedischargedemonstratesapatternoftoxicityexceedingthechronictoxicitytrigger,thePermitteeisrequiredtoinitiateaToxicityReductionEvaluation(TRE),inaccordancewithanapprovedTREworkplantodeterminewhetherthedischargeiscontributingchronictoxicitytothereceivingwater.SpecialProvisionVI.C.2.a.iirequiresthePermitteetomaintaintheTREWorkPlantoensurethePermitteehasaplantoimmediatelymoveforwardwiththeinitialtiersofaTRE,intheeventeffluenttoxicityisencountered

inthefuture.Theprovisionalsoincludesanumerictoxicitymonitoringtriggerandrequirementsforacceleratedmonitoring,aswellasrequirementsforTREinitiationifapatternoftoxicityisdemonstrated.

ChronicWETlimitationswillbeestablishedifmonitoringresultsdemonstratethatdischargesfromtheFacilityarecausingorcontributingtochronictoxicityinthereceivingwater.

c. Ammonia‐relatedToxicity

Thechronictoxicitytestshallbeconductedwithoutmodificationstoeliminateammoniatoxicity.AmmoniatoxicityinwaterisduemostlytoitsunionizedfractionwhichisprimarilyafunctionofthetemperatureandthepHofthewaterbeingtested.AsthepHandtemperatureincreasesodoesthetoxicityofagivenconcentrationofammonia.InstaticWETtests,thepHinthetestconcentrationsoftenincreases(drifts)duetothelossofcarbondioxide(CO2)fromthetestconcentrationsasthetestchambersareincubatedoverthetestperiod.ThisupwarddriftresultsinpHvaluesinthetestconcentrationsthatoftenexceedthosepHvaluesthatcouldreasonablybeexpectedtobefoundintheeffluentorinthemixingzoneunderambientconditions.UnionizedammoniatoxicitycausedbypHdriftisconsideredtobeanartifactoftestconditionsandisnotatruemeasureoftheammoniatoxicitylikelytooccurasthedischargeentersthereceivingwaters.Inordertoreducetheoccurrenceofartifactualunionizedammoniatoxicity,itmaybenecessarytocontrolthepHintoxicitytests,providedthecontrolofpHisdoneinamannerthathastheleastinfluenceonthetestwaterchemistryandonthetoxicityofotherpHsensitivematerialssuchassomeheavymetals,sulfideandcyanide.ThisOrderauthorizestheuseofpHcontrolprocedureswheretheproceduresareconsistentwithUSEPAmethodsanddonotsignificantlyalterthetestwaterchemistrysoastomaskothersourcesoftoxicity.

D. FinalEffluentLimitations

1. SatisfactionofAnti‐BackslidingRequirements

Sections402(o)(2)and303(d)(4)oftheCWAandfederalregulationsattitle40,CodeofFederalRegulationssection122.44(l)prohibitbackslidinginNPDESpermits.Theseanti‐backslidingprovisionsrequireeffluentlimitationsinareissuedpermittobeasstringentasthoseinthepreviouspermit,withsomeexceptionswherelimitationsmayberelaxed.AlleffluentlimitationsinthisOrderareatleastasstringentastheeffluentlimitationsinthepreviousOrder.

2. SatisfactionofAntidegradationPolicy

ThisOrderisconsistentwithapplicablefederalandStateantidegradationpolicies,asitdoesnotauthorizethedischargeofincreasedconcentrationsofpollutantsorincreasedvolumesoftreatedwastewater.Alleffluentlimitations,standards,andconditionscontainedinthisOrderareatleastas(ormore)stringentastheeffluentlimitationsinOrderNo.R1‐2006‐0049.

WithrespecttodischargesofchlorineresidualfromDischargePoint001,neweffluentlimitationsareestablishedinthisOrder.InthepreviousOrder,theeffluentlimitationwasexpressedasnodetectablelevelsofchlorineresidualinthedischarge,usingamethoddetectionlimitof0.1mg/L.Thenewlimitationsareexpressedasanaveragemonthlylimitationof0.01mg/Landamaximumdailylimitationof0.02mg/L.ThenewlimitationsestablishedintheOrderarenumericallylowerthantheminimumdetectionlimitforthefinaleffluentlimitationofthepreviouspermitthatrequirednodetectablelevelofchlorineintheeffluentatthepointofdischarge.Althoughnolongerexpressedas“non‐detect”,thenewlyestablishedeffluentlimitationsareeffectivelymorestringentlimitationsbecausethedischargeisrequiredtoachieveaneffluentconcentrationofchlorineresidualthatisnumericallylowerthanwasrequiredbythepreviouspermit.Thus,anti‐backslidingrequirementsaresatisfiedforchlorineresidual.

3. SatisfactionofAntidegradationPolicy

a. SurfaceWater.ThisOrderisconsistentwithapplicablefederalandStateantidegradationpolicies,asitdoesnotauthorizethedischargeofincreasedconcentrationsofpollutantsorincreasedvolumesoftreatedwastewaterbeyondthatwhichwaspermittedtodischargeinaccordancewiththepreviousOrder.

b. Groundwater.Thebeneficialusesoftheunderlyinggroundwateraremunicipalanddomesticsupply,industrialservicesupply,industrialprocesssupply,agriculturalsupply,andaquaculture,andNativeAmericanculturaluses.Groundwaterlimitationsarerequiredtoprotectthebeneficialusesoftheunderlyinggroundwater.

StateWaterBoardResolutionNo.68‐16,requires,inpart,thatwhenevertheexistingqualityofwaterisbetterthanthequalityestablishedinpoliciesasofthedateonwhichsuchpoliciesbecomeeffective,suchexistinghighqualitywaterwillbemaintaineduntilitisdemonstratedtothestatethatanychangeswillbeconsistentwiththemaximumbenefittothepeopleofthestate,willnotunreasonablyaffectbeneficialusesofsuchwater,andwillnotresultinwaterqualitylessthanprescribedinthepolicies.

4. StringencyofRequirementsforIndividualPollutants

ThisOrdercontainsbothtechnology‐basedeffluentlimitationsandWQBELsforindividualpollutants.Thetechnology‐basedeffluentlimitationsconsistofrestrictionson5‐daybiochemicaloxygendemand(BOD5),totalsuspendedsolids(TSS),pH,andtheminimumpercentremovalforBOD5andTSS.ThisOrder’stechnology‐basedpollutantrestrictionsimplementtheminimumapplicablefederaltechnology‐basedrequirements.Inaddition,thisOrdercontainseffluentlimitationsforBOD5andTSS,pH,andtotalcoliformbacteriathataremorestringentthantheminimum,federaltechnology‐basedrequirementsandarenecessarytoachievetertiarytreatmentofwastewater,consistentwiththeBasinPlan’srequirementsthatdischargesofmunicipalwastewaterintotheRussianRiveranditstributariesbeofadvancedtreatedwater.RestrictionsonthesepollutantsarediscussedinsectionIV.BinthisFactSheet.

ThisFacilityisnotdesignedtoachievetertiarytreatmentofwastewaterasrequiredbytheBasinPlan,thuscannotcurrentlymeettheadditionaltechnology‐basedeffluentlimitationsforBOD5andTSS.

WQBELshavebeenscientificallyderivedtoimplementwaterqualityobjectivesthatprotectbeneficialuses.Boththebeneficialusesandthewaterqualityobjectiveshavebeenapprovedpursuanttofederallawandaretheapplicablefederalwaterqualitystandards.TotheextentthattoxicpollutantWQBELswerederivedfromtheCTR,theCTRistheapplicablestandardpursuantto40CFR131.38.ThescientificproceduresforcalculatingtheindividualWQBELsforprioritypollutantsarebasedontheSIP,whichwasapprovedbyUSEPAonMay18,2000.MostbeneficialusesandwaterqualityobjectivescontainedintheBasinPlanwereapprovedunderstatelawandsubmittedtoandapprovedbyUSEPApriortoMay30,2000.AnywaterqualityobjectivesandbeneficialusessubmittedtoUSEPApriortoMay30,2000,butnotapprovedbyUSEPAbeforethatdate,arenonetheless“applicablewaterqualitystandardsforpurposesoftheCWA”pursuantto40CFR131.21(c)(1).TheremainingwaterqualityobjectivesandbeneficialusesimplementedbythisOrder(specificallytheadditionofthebeneficialusesWaterQualityEnhancement(WQE),FloodPeakAttenuation/FloodWaterStorage(FLD),WetlandHabitat(WET),NativeAmericanCulture(CUL),andSubsistenceFishing(FISH))andtheGeneralObjectiveregardingantidegradation)wereapprovedbyUSEPAon,March4,2005,andareapplicablewaterqualitystandardspursuantto40CFR131.21(c)(2).Collectively,thisOrder’srestrictionsonindividualpollutantsarenomorestringentthanrequiredtoimplementtherequirementsoftheCWA.

TheRegionalWaterBoardhasconsideredthefactorsinWaterCodesection13263,includingtheprovisionsofWaterCodesection13241,inestablishingthese

requirements.Factorssetforthinsection13241mustbeevaluatedforrequirementsthatgobeyondwhatisrequiredbytheCleanWaterAct.

WaterCodesection13263requiresthatwastedischargerequirements“implementanyrelevantwaterqualitycontrolplansthathavebeenadoptedandtakeintoconsiderationthebeneficialusestobeprotected,thewaterqualityobjectivesreasonablyrequiredforthatpurpose,otherwastedischarges,theneedtopreventnuisanceandtheprovisionsofsection13241.”Theserequirements,however,onlyapplytothoseportionsofthepermitthatexceedtherequirementsofthefederalCWA,andnottothoserequirementsthatarenecessarytomeetthetechnology‐basedeffluentlimitationsortheWQBELsnecessarytoprotectwaterqualityobjectivesforsurfacewaterssetoutintheBasinPlan.(CityofBurbankv.StateWaterResourcesControlBoard,35Cal.4th613,627.)InthisOrder,thoserequirementsthatexceedtherequirementsofthefederalCWAarethosethatsolelyapplytothelanddischarge.Nonetheless,theRegionalWaterBoardconsideredthefactorsinWaterCodesection13263and13241inestablishingtherequirementsfordischargestosurfacewatersandland,andconcludedthatthefactorsdidnotmeritanychangetotheproposedeffluentlimits,dischargeprohibitions,orreceivingwaterlimitations.

TheRegionalWaterBoardconsideredthefactorssetforthinsection13263and13241throughoutvariousportionsofthepermit,includingAttachmentF,whichcontainsbackgroundinformationandrationalefortherequirementssetforthinthepermit.Thepermit,insectionII.H,andsectionIII.CofAttachmentF,identifiesthebeneficialusesidentifiedintheBasinPlan.SectionIVofAttachmentFsetsforththerationalefortheeffluentlimits,particularlythebeneficialusestobeprotectedandwaterqualityobjectivesrequiredforthatpurpose.AlleffluentlimitationsestablishedforsurfacewaterdischargesarerequiredbytheCWA,BasinPlanorCTR‐SIP.SectionIV.FofAttachmentFsetsoutadiscussionofthefactorssetforthin13263and13241consideredfortheeffluentlimitsonthelanddischarge.TheRegionalWaterBoardalsoconsideredupgradestotheFacilityperformedbythePermittee,alongwithotherwastedischargesinthewatershed,andconcludedthatcoordinatedcontrolofotherdischargeswouldnoteliminatetheneedfortherequirementsonthisdischarge,particularlygiventhecontinuedgrowthintheregionandthepast,presentandprobablefutureusesofthereceivingwatersandtheenvironmentalcharacteristics,includingwaterquality,oftheGuernevillehydrologicsubareaoftheRussianRiver.(SeeAttachmentF,SectionIII.D,III.E,IV,andV.)TheRegionalWaterBoardalsoconsideredtheneedtodevelopanduserecycledwater,andthepotentialforincreasedreclamationopportunities.TheRegionalWaterBoardalsoconsideredtheneedtopreventnuisance,andincorporateddischargeprohibitionstoprotectagainstnuisancecausedbythedischargeoruseforreclamationofuntreatedorpartiallytreatedwastefromanywherewithinthecollection,treatmentordisposalsystemorfromsanitaryseweroverflows.Monitoringandreportingrequirementsareestablishedtoassesscompliancewitheffluentlimitationsandreceivingwater

limitations.MonitoringfrequenciesareestablishedbasedonthreattowaterqualityandareconsistentwithmonitoringfrequenciesrequiredofotherdischargersintheNorthCoastRegion.

AlthoughthePermitteedidnotsubmitaneconomicanalysis,theRegionalWaterBoardisawarethattheresidentsinOccidentalcurrentlypayannualsewerchargesof$1,682perequivalentsingle‐familydwelling(ESD).Theseratesareapproximately2.6percentofthemedianhouseholdincome(MHI)OF$64,714basedonthe2010censusreport.

RegionalWaterBoardstaffconsideredOccidental’seconomicstatusinestablishingnewpermitrequirementsandcarefullyconsideredthecostandneedforadditionalmonitoringrequirements.Althoughnewpermitrequirementsforreclamation/landdischargeandsurfacewaterdischargeshavebeenaddedtotheproposedpermitthatwerenotinthepriorpermit,RegionalWaterBoardstaffcarefullyconsideredthepriorityandtimingofnewrequirements.NewrequirementsrelatedtosurfacewaterdischargesarediscussedinthefollowingparagraphswhilenewrequirementsrelatedtoreclamationarediscussedinFactSheetsectionIV.GReclamationSpecifications.

Monitoringfrequenciesformanyconstituentswereretainedatthesamelevelasthepreviouspermit.Monitoringrequirementswereonlyincreasedwherenecessary.Forexample,effluentdischargeandreceivingwatermonitoringrequirementswereincreasedfordissolvedoxygen,temperature,pH,andturbidityduetotheneedtobetterassessimpactsofthedischargeonthesmallreceivingwaterstream.Threeoftheseparameterscanbemonitoredatthetreatmentplant,thussavingcostsofmoreexpensivelaboratoryanalyses.Inaddition,effluentandreceivingwaternutrientmonitoringarenecessaryduetothefactthattheFacilitydoesnotremovenitrogenandammoniaishighlytoxictoaquaticlife.

TablesF‐13throughF‐15summarizeallfinaleffluentlimitationsincludedintheOrderandthebasisfortheirinclusion.

SummaryofFinalEffluentLimitationsDischargePoints001,002,and003

TableF‐13. SummaryofFinalEffluentLimitations–DischargePoint001

Basis1AverageMonthly

AverageWeekly

MaximumDaily

InstantaneousMinimum

InstantaneousMaximum

mg/L 10 15 ‐‐ ‐‐ ‐‐AWTlbs/day2

(dry‐weather)11 16 ‐‐ ‐‐ ‐‐

%Removal 85 ‐‐ ‐‐ ‐‐ ‐‐ CFR

AverageWeekly

MaximumDaily

mg/L 10 15 ‐‐ ‐‐ ‐‐AWTlbs/day2

(dry‐weather)11 16 ‐‐ ‐‐ ‐‐

%Removal 85 ‐‐ ‐‐ ‐‐ ‐‐ CFRTotalColiformBacteria

MPN/100mL ‐‐ 2.2. 23 ‐‐ ‐‐ AWT

pH standardunits

‐‐ ‐‐ ‐‐ 6.5 8.5 BP

Copper,TotalRecoverable

µg/L 3.6 ‐‐ 7.8 ‐‐ ‐‐ CTR

Lead,TotalRecoverable

µg/L 0.65 ‐‐ 1.5 CTR

Silver,TotalRecoverable

µg/L 0.5 ‐‐ 1.0 CTR

Dichlorobromomethane

µg/L 0.56 ‐‐ 1.3 ‐‐ ‐‐ CTR

Chlorodibromomethane

µg/L 0.41 ‐‐‐ 0.8 ‐‐‐ ‐‐‐ CTR

Bis(2‐ethylhexyl)Phthalate

µg/L 1.8 4.5 CTR

Chlorine,TotalResidual

mg/L 0.01 ‐‐ 0.02 ‐‐ ‐‐ AL

AmmoniaNitrogen,asN

mg/L 1.2 ‐‐ 2.1 ‐‐ ‐‐ AL

Nitrate mg/L 10 ‐‐‐ 20 ‐‐‐ ‐‐‐ MCLAcuteToxicity3

%Survival ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ BP

TableNotes:1. AWT–Basedonthetechnicalcapabilityofanadvancedwastewatertreatmentfacility.

BP–BasedonwaterqualityobjectivescontainedintheBasinPlan.

CFR–Basedonsecondarytreatmentregulationscontainedin40CFRPart133.

CTR–BasedonwaterqualitycriteriacontainedintheCaliforniaToxicsRuleandappliedasspecifiedintheSIP.

PO–BasedoneffluentlimitationscontainedinthepreviousOrderNo.93‐42

AL–BasedontheQualityCriteriaforWater1986(TheGoldBook,1986,EPA440/5/‐86‐001)forprotectionoffreshwateraquaticlife.

MCL–BasedontheMaximumContaminantLevel.

NAWQC–BasedontheNationalAmbientWaterQualityCriteriaforprotectionoffreshwateraquaticlife.

2.Mass‐basedeffluentlimitationsapplyduringperiodsofdischargetosurfacewaters.SeesectionVII.HofthisOrderregardingcompliancewithmass‐basedeffluentlimitations.

3. ThereshallbenoacutetoxicityintreatedwastewaterdischargedtoGraham’sPondorDutchBillCreek.ThePermitteewillbeconsideredcompliantwiththislimitationwhen

thesurvivalofaquaticorganismsina96‐hourbioassayofundilutedeffluentcomplieswiththefollowing:(1)Minimumforanyonebioassay:70percentsurvival;and(2)

Medianforanythreeormoreconsecutivebioassaysatleast90percentsurvival.CompliancewiththeseeffluentlimitationsshallbedeterminedinaccordancewithsectionV.A

oftheMonitoringandReportingProgram(AttachmentE.).

AverageWeekly

MaximumDaily

pH standardunits

‐‐ ‐‐ ‐‐ 6.5 8.5 BP

TableNotes:1. BP–BasedonwaterqualityobjectivescontainedintheBasinPlan.

AverageWeekly

MaximumDaily

Nitrate(asN) mg/L 10 ‐‐‐ 20 ‐‐‐ ‐‐‐ MCLAmmonia(asN) mg/L 1.5 ‐‐‐ ‐‐‐ ‐‐‐ ‐‐‐ MCLTotalDissolvedSolids

mg/L500 ‐‐‐ ‐‐‐ ‐‐‐ ‐‐‐

Sodium mg/L 60 ‐‐‐ ‐‐‐ ‐‐‐ ‐‐‐ MCL

Chloride mg/L 250 ‐‐‐ ‐‐‐ ‐‐‐ ‐‐‐ MCL

Aluminum mg/L 1.0 ‐‐‐ ‐‐‐ ‐‐‐ ‐‐‐ MCL

pH pHUnits

‐‐‐ ‐‐‐ ‐‐‐ 6.0 9.0 BP

TableNotes:1. MCL–BasedontheMaximumContaminantLevel.

BP–BasedonwaterqualityobjectivescontainedintheBasinPlan.

E. InterimEffluentLimitations

TheOrderdoesnotincludeanyinterimlimitationsfordischargestosurfacewaters.CDONo.R1‐2012‐0102,adoptedconcurrentlywiththisOrderincludesinterimeffluentlimitationsforBOD5,TSS,copper,lead,silver,DCBM,CDBM,bis(2‐ethylhexyl)phthalate,andammonia,withascheduletoachievecompliance.

F. LandDischargeSpecifications

SectionVI.C.2.cofthisOrderrequiresthePermitteetoconductaspecialstudytodeterminewhetherirrigationoftheLoades’propertyisatgreaterthanagronomicratesoratorbelowagronomicrates.Ifirrigationisatgreaterthanagronomicrates,thePermitteeshallcomplywiththelanddischargespecificationsinsectionIV.BoftheOrder.

G. ReclamationSpecifications

ThePermitteeusestreated,disinfected,dechlorinatedeffluenttoirrigateapastureadjacenttotheeffluentstoragepond,Graham’sPond,fromMay15throughSeptember30andothertimesduringtheyearwhenweatherallows(e.g.,dryfall,winterandspringperiods).SectionVI.C.2.coftheOrderrequiresthePermitteetoconductaspecialstudytodeterminewhetherirrigationoftheLoades’propertyisatgreaterthanagronomicratesoratorbelowagronomicrates.Ifirrigationisatorbelowagronomicrates,thePermitteeshallcomplywiththereclamationspecificationsinsectionIV.CoftheOrder.

Section13263oftheWaterCoderequirestheRegionalWaterBoardtoprescriberequirementsforproposeddischarges,existingdischarges,ormaterialchangeinanexistingdischargebasedupontheconditionsofthedisposalareaorreceivingwatersuponorintowhichthedischargeismadeorproposed.Theprescribedrequirementsshallimplementanyrelevantwaterqualitycontrolplansthathavebeenadopted,andshalltakeintoconsiderationthebeneficialusestobeprotected,thewaterqualityobjectivesreasonablyrequiredforthatpurpose,otherwastedischarges,theneedtopreventnuisance,andtheprovisionsofWaterCodesection13241.Inprescribingrequirements,theRegionalWaterBoardisnotobligatedtoauthorizethefullwasteassimilationcapacitiesofthereceivingwater.

Here,theRegionalWaterBoardconsideredallofthesefactorswhendevelopingthewastedischargerequirementsforthereclamationdischarge.LimitationsforBOD5,TSS,andpHwerescientificallyderivedtoimplementwaterqualityobjectivesthatprotectbeneficialuses.BothbeneficialusesandthewaterqualityobjectiveshavebeenapprovedpursuanttoStatelaw,andthensubmittedtoandapprovedbyUSEPA.Inaddition,dischargeprohibitionswereincludedtoprohibitthereclamationuseofuntreatedorpartiallytreatedwaste,inordertopreventnuisance.Inaddition,theRegionalWaterBoardconsideredthefactorssetforthinWaterCodesection13241,includingtheconsiderationofpast,present,andprobablefuturebeneficialusesofthereceivingwater,whichtheRegionalWaterBoardanticipatestobethesameassetforthintheBasinPlan.TheRegionalWaterBoardconsideredtheenvironmentalcharacteristics,includingwaterqualityoftheRussianRiver‐GuernevilleHydrologicSubareaoftheRussianRiverHydrologicUnit,thecoordinatedcontrolofallfactorswhichaffectwaterqualityinthearea,andtheneedtodevelopanduserecycledwater,whichthisOrdersupports.AlthoughthePermitteedidnotsubmitaneconomicanalysis,RegionalWaterBoardstaffconsideredOccidental’seconomicstatusinestablishingnewpermitrequirementsandcarefullyconsideredthecostandneedforadditionalmonitoringrequirements.Newrequirementswereaddedonlyasnecessary.

Effluentmonitoringrequirementswereaddedfornutrientsandsaltsduetotheneedtoassessnitrogenandsaltapplicationratesforrecycledwater.Themonitoringandreportingprogramallowsforapotentialreductionofsomeofthesemonitoringrequirementsifmonitoringdemonstratesnoreasonablepotential.

2. ApplicableBeneficialUsesandWaterQualityCriteriaandObjectives

a. BeneficialUses.BeneficialusedesignationsforgroundwaterestablishedintheBasinPlanincludeMUN,IND,PRO,AGR,andFRSH.

b. BasinPlanWaterQualityObjectives.TheBasinPlancontainsnarrativeobjectivesfortastesandodors,bacteria,radioactivity,andchemicalconstituents(includingthosechemicalsthatadverselyaffectagriculturalwatersupply)thatapplytogroundwater.

3. DeterminingtheNeedforWQBELsandTechnology‐BasedLimitsforReclamation

ThefollowingreclamationspecificationsapplytoeffluentdischargestoallauthorizedreclamationsitesatDischargePoint003.

a. BOD5andTSS.ThisOrderestablishesdischargespecificationsforBOD5andTSSbasedontechnology‐basedeffluentlimitations.Section133.102of40CFRestablishestheminimumlevelofeffluentqualitythatmustbeattainedbysecondarytreatmentforBOD5andTSS,butallowsforsomeexceptionsasprovidedforinsections133.103and133.105.ThesecondarytreatmenteffluentlimitationsforBOD5andTSSareupto30mg/L(30‐dayaverage)and45mg/L(7‐dayaverage).Section133.105allowsalternativelimitationsforfacilitiesusingtricklingfiltersandwastestabilizationpondsthatmeettherequirementsfor“equivalenttosecondarytreatment.”These“equivalenttosecondarytreatment”limitationsareupto45mg/L(30‐dayaverage)andupto65mg/L(7‐dayaverage)forBOD5andTSS.Section133.103(c)allowsforlessstringentTSSlimitationsforPOTWsthatusewastestabilizationpondsastheprincipalprocessforsecondarytreatmentandwhoseoperationandmaintenancedataindicatethattheTSSvaluesspecifiedintheequivalent‐to‐secondaryregulationscannotbeachieved.

Section133.101(g)prescribestheconditionsunderwhichaPOTWiseligibleforconsiderationforequivalent‐to‐secondarylimitationsasfollows:

(a) Theprincipaltreatmentprocessmustbeeitheratricklingfilterorwastestabilizationpond;

(b) Theeffluentqualityconsistentlyachieved,despiteproperoperationsandmaintenance,isinexcessof30mg/LBOD5and/orTSS;and

(c) Waterqualityisnotadverselyaffectedbythedischarge.

ThePermittee’sFacilitymeetscondition(a)abovebecausetheprincipalwastetreatmentprocessisawastestabilizationpond.

ThepreviouspermitrequiredcompliancewithstandardsecondaryeffluentlimitationsforBOD5.AlthoughmonitoringdatacollectedduringthetermofthepreviouspermitdemonstratesthatthePermitteeisnotabletocomplyconsistentlywiththestandardsecondaryeffluentlimitationsforBOD5,effluentlimitationscannotbemadelessstringentthantheeffluentlimitationsinthepreviouspermit.

Thepreviouspermitincludedequivalent‐to‐secondaryeffluentlimitationsforTSSthatconsistofamonthlyaverageof50mg/L,aweeklyaverageof65mg/Landadailymaximumof80mg/L.Themonthlyaverageeffluentlimitationof50mg/Lislessstringentthantheequivalent‐to‐secondaryeffluentlimitationestablishedinthefederalregulationsbecausemaintenanceandmonitoringdatademonstratedthattheTSSvaluesspecifiedintheequivalent‐to‐secondaryregulationscouldnotbeachieved.MonitoringdatacollectedduringthetermofthepreviouspermitdemonstratesthatthePermitteeisnotabletocomplyconsistentlywitheventhemodifiedequivalent‐to‐secondaryeffluentlimitations,however,limitationscannotbemadelessstringentthantheeffluentlimitationsinthepreviouspermit.

b. ColiformBacteria.ThisOrderestablishesreclamationspecificationsforcoliformbacteriathatreflectstandardsforsecondarytreatedrecycledwateradoptedbytheCDPHintitle22oftheCaliforniaCodeofRegulationsandareincludedtoensurethatrecycledwaterqualityisprotectiveofhumanhealth.

c. pH.TheOrderestablishesareclamationdischargespecificationforpHof6.0to9.0basedontechnology‐basedeffluentlimitationsrequiredbyUSEPApursuantto40CFRPart133.ThesepHlimitsareincludedintheOrdertoensurethatpHlevelsareappropriateforprotectionofgroundwaterwhendischargingtoreclamationsites.

d. ChemicalConstituents.TheBasinPlanrequiresthatwatersdesignatedforuseasMUNshallnotcontainconcentrationsofchemicalconstituentsinexcessofthelimitsspecifiedinCCR,title22,Chapter15,Division4,Article4,Section64435(Tables2and3),andSection64444.5(Table5),andlistedinTable3‐2oftheBasinPlan.MonitoringandReportingProgramNo.93‐42didnotrequiresuchmonitoring.ThemonitoringandreportingprogramrequiresthePermitteeto

monitorforconstituentslistedintheCCR,title22,division4,chapter15,sections64431(inorganicchemicals)and64444(organicchemicals)onetimeduringthetermofthisOrderinordertodeterminewhetheranyoftheseconstituentsarepresentinthetreateddisinfectedrecycledwater.

4. WQBELCalculations

ThissectiondoesnotapplytothereclamationaspectofthisFacility.AllofthereclamationspecificationsarebasedonthetechnicalcapabilitiesofthetreatmentsystemandlevelsrequiredbytheBasinPlanandtitle22,thusnocalculationswereneededtodeterminetheWQBELs.

TableF‐16. SummaryofReclamationSpecifications

Parameter Units

DischargeSpecifications

AverageMonthly

AverageWeekly

MaximumDaily

mg/L 30 45 60 ‐‐

mg/L 50 65 80 ‐‐

pH standardunits

‐‐ ‐‐ 6.0 9.0

TotalColiformBacteria

MPN/100mL

‐‐‐ 23 240 ‐‐

TableNotes:1. NottoexceedanMPNof23/100mLusingthebacteriologicalresultsofthelastsevendaysforwhichanalyseshavebeencompleted.

2. NottoexceedanMPNof240/100mLinmorethanonesampleinany30‐dayperiod.

5. WaterReclamationRequirementsandProvisions

SectionIV.CoftheOrderincludesIrrigation/ReclamationSpecificationsandRequirementsthatapplytotheirrigationsystem.RegionalWaterBoardstaffreviewedmonitoringreportsthatidentifiedtheamountoftreatedeffluentirrigatedontheLoades’propertyirrigationsiteanditappearsthatirrigationvolumesmayexceedagronomicrates,atleastduringpartoftheirrigationseason.SectionVI.C.2.coftheOrderrequiresthePermitteetoconductaspecialstudytoidentifywhetherornotirrigationisatagronomicratesornot.

AkeytosuccessfulreclamationisforthePermitteetoestablishappropriateBMPstoprotectagainstthepossibilityofrecycledwaterspills.ThussectionIV.C.4.doftheOrderrequiresthePermitteetorecognizethepossibilityofrunofffromrecycled

wateruseareasanddescribemeasures,includingBMPsthatthePermitteewillimplementtominimizethepossibilityofrunoff.

H. OtherRequirements

TheOrdercontainsadditionalspecificationsthatapplytotheFacility.TurbidityandDisinfectionProcessRequirementsforChlorineDisinfectionSystemapplyintheeventthatthePermitteechoosestocontinuetodischargetosurfacewaters.StoragePondrequirementsapplytoanyexistingpondsthatarenewlyaddedtothesystemforeffluentstorageorforconstructionofneweffluentstorageponds.

1. Turbidity.Anyfuturetertiaryupgrademustcomplywithturbidityrequirementsfoundintitle22section60301.230.Thisprovisionspecifiesthattheturbidityofthefilteredwastewaternotexceedanaverageof2NTUinany24‐hourperiod,5NTUmorethan5percentofthetime,and10NTUatanytime.Thetitle22definitionisusedasareasonableperformancestandardtoensureadequateremovalofturbidityupstreamofdisinfectionfacilities.Properlydesignedandoperatedeffluentfilterswillmeetthisstandard.Thepointofcompliancefortheturbidityrequirementsisapointfollowingfiltrationandbeforedischargetothedisinfectionsystem.

2. DisinfectionProcessRequirementsforChlorineDisinfectionSystem.Anyfuturetertiaryupgradesmustcomplywithchlorinedisinfectionrequirementsfoundintitle22,includingrequirementstoachieveaCTvalueof450mg‐min/L.Theserequirementsarenecessarytodemonstrateeffectivepathogenreductionforprotectionofhumanhealth.

3. StoragePonds.StoragepondrequirementsareincludedinsectionIV.C.2.doftheOrdertoensurethatfuturestoragepondsareconstructedinamannerthatprotectsgroundwaterandcomplieswithrequirementsoftitle27oftheCCR.

V. RATIONALEFORRECEIVINGWATERLIMITATIONS

A. SurfaceWater

CWAsection303(a‐c)requiresstatestoadoptwaterqualitystandards,includingcriteriawheretheyarenecessarytoprotectbeneficialuses.TheRegionalWaterBoardadoptedwaterqualitycriteriaaswaterqualityobjectivesintheBasinPlan.TheBasinPlanstatesthat“[t]henumericalandnarrativewaterqualityobjectivesdefinetheleaststringentstandardsthattheRegional[Water]Boardwillapplytoregionalwatersinordertoprotectthebeneficialuses.”TheBasinPlanincludesnumericandnarrativewaterqualityobjectivesforvariousbeneficialusesandwaterbodies.ThisOrdercontainsReceivingSurfaceWaterLimitationsbasedontheBasinPlannumericalandnarrativewaterqualityobjectivesforbiostimulatorysubstances,bacteria,chemicalconstituents,color,dissolved

oxygen,floatingmaterial,oilandgrease,pH,pesticides,radioactivity,sediment,settleablematerial,suspendedmaterial,tastesandodors,temperature,toxicity,andturbidity.

B. Groundwater

1. Thebeneficialusesoftheunderlyinggroundwateraremunicipalanddomesticsupply,industrialservicesupply,industrialprocesssupply,agriculturalsupply,NativeAmericanculture,andaquaculturetosurfacewaters.

2. Groundwaterlimitationsarerequiredtoprotectthebeneficialusesoftheunderlyinggroundwater.

3. DischargesfromtheFacilityshallnotcauseexceedanceofapplicablewaterqualityobjectivesorcreateadverseimpactstobeneficialusesofgroundwater.

4. TheBasinPlanrequiresthatwatersdesignatedforuseasMUNshallnotcontainconcentrationsofchemicalconstituentsinexcessofthelimitsspecifiedintitle22,division4,chapter15,article4.1,section64435,andarticle5.5,section64444oftheCCR.

VI. RATIONALEFORMONITORINGANDREPORTINGREQUIREMENTS

40CFR122.48requiresthatallNPDESpermitsspecifyrequirementsforrecordingandreportingmonitoringresults.WaterCodesections13267and13383authorizetheRegionalWaterBoardtorequiretechnicalandmonitoringreports.TheMonitoringandReportingProgram(MRP)establishesmonitoringandreportingrequirementstoimplementfederalandstaterequirements.ThisMonitoringandReportingProgramisprovidedinAttachmentEofthispermit.ThefollowingprovidestherationaleforthemonitoringandreportingrequirementscontainedintheMRPforthisFacility.

A. InfluentMonitoring

Influentmonitoringrequirementsforflow,BOD5,TSSandsettleablesolidsareretainedfromthepreviousmonitoringandreportingprogram,OrderNo.93‐42,revisedonApril23,2009.InfluentmonitoringforBOD5andTSSarenecessarytodeterminecompliancewiththeOrder’spercentremovalrequirementfortheseparameters.

B. EffluentMonitoring

Effluentmonitoringrequirementsarenecessarytodeterminecompliancewithprohibitionsand/oreffluentlimitationsestablishedbytheOrder.MonitoringatMonitoringLocationsEFF‐001andEFF‐002isnecessarytodemonstratecompliancewithtechnology‐basedeffluentlimitations,demonstratecompliancewithWQBELs,and

demonstratewhetherornotthedischargeposesreasonablepotentialforapollutanttoexceedanynumericornarrativewaterqualityobjectives.

1. DischargePoint001atMonitoringLocationEFF‐001(dischargestoGraham’sPond):

a. Retainedmonitoringrequirementsforflow,BOD5,TSS,settleablesolids,pH,chlorineresidual,acutetoxicity,hardness,DCBM,lead,silver,ammonia,nitrate,andphosphorus.

b. Removedmonitoringrequirementforzincbasedonnofindingofreasonablepotential.

c. Addedanewdailymonitoringrequirementfortemperature

d. Addednewmonthlyeffluentmonitoringrequirementsforcopper,cyanide,chlorodibromomethane,bromoform,chloroform,bis(2‐ethylhexyl)phthalate,andorganicnitrogen.

e. Addednewannualeffluentmonitoringrequirementforchronictoxicity.

f. AddednewmonitoringrequirementsforCTRpollutantsandtitle22pollutantsonetimeduringthepermitterm.

2. DischargePoint002atMonitoringLocationEFF‐002(dischargesfromGraham’s

Pond):

a. Retainedmonitoringrequirementsforflow,dilutionrate,dissolvedoxygen,pH,temperature,hardness,andturbidity.

C. WholeEffluentToxicityTestingRequirements

Wholeeffluenttoxicity(WET)limitationsandmonitoringrequirementsareretainedfromthepreviousMRP(OrderNo.93‐42revisedonApril23,2009)andareincludedintheOrdertoprotectthereceivingwaterqualityfromtheaggregateeffectofamixtureofpollutantsintheeffluent.Acutetoxicitytestingmeasuresmortalityin100percenteffluentoverashorttestperiodandchronictoxicitytestingisconductedoveralongertimeperiodandmaymeasuremortality,reproduction,and/orgrowth.

NewmonitoringrequirementsforchronictoxicityhavebeenaddedtoassesscompliancewiththeBasinPlan’snarrativewaterqualityobjectivefortoxicityandwithmonitoringtriggersforchronictoxicityestablishedinsectionVI.C.2.a.ioftheOrder.

D. LandDischargeMonitoringRequirements

SectionVI.C.2.coftheOrderrequiresthePermitteetoconductaspecialstudytodetermineifirrigationoftheLoades’propertyisatagronomicrates(reclamation)orgreaterthanagronomicrates(landdischarge).Ifirrigationisatgreaterthanagronomic

rates,theMRPwillbemodifiedtoincludelanddischargemonitoringrequirementsinplaceofreclamationmonitoringrequirements.

E. Irrigation/ReclamationMonitoringRequirements

IfthespecialstudydescribedinSectionVI.C.2.coftheOrderdemonstratesthatirrigationisatorbelowagronomicrates,thePermitteeshallcomplywiththereclamationmonitoringrequirementsinsectionVIIoftheMRP.

TheOrderrequiresthatthePermitteecomplywithapplicablestateandlocalrequirementsregardingtheproductionanduseofreclaimedwastewater.

TheMRPrequiresthePermitteetomonitorcontinuouslyforflowandreporttheaverageandmaximumdailyflowrate;reportthenumberofdaysthattreatedwastewaterisusedforreclamationatallauthorizedsites;andreporttheaverageandmaximumdailyflowratetoauthorizedreclamationsites;andreportthemonthlyvolumeandnitrogenapplicationrateforeachusesite.Theserequirementsapplyimmediatelyforanynewreclamationsiteanduponcompletionofagronomicratestudiesforexistingreclamationsites.

TheOrderincludesseveralnewreclamationmonitoringrequirementsincluding:

1. WeeklymonitoringforpHasdiscussedinsectionB.,above.

2. Monthlymonitoringfornitrate,nitrite,ammonia,andorganicnitrogen.Itisnecessarytodeterminethetotalnitrogenconcentrationoftheeffluentinordertoensureapplicationofrecycledwateratnutrientagronomicrates.

3. Monthlymonitoringfortotaldissolvedsolids,chloride,boron,andsodiumtodeterminewhetheranyoftheseconstituentsarepresentintheeffluentatconcentrationsthatmayexceedwaterqualityobjectivesfortheseconstituents.TDSisadirectmeasureofsalinity,whichcanaffectunderlyinggroundwaterqualityasitrelatestodrinkingwaterandagriculturalsupplybeneficialuses.SecondaryMCLsfortasteandodorindrinkingwaterhavebeenestablishedbyCDPHforTDS(500mg/L),chloride(250mg/L)andsodium(60mg/L).Anagriculturalwaterqualitylimitof0.7mg/Lhasbeenestablishedforboron.TheMRPallowsforreductionofmonitoringfrequencyoreliminationofthemonitoringrequirementifmonitoringdatacollectedovertimedemonstratesthatanyconstituentispresentinconcentrationsthatcouldnotcauseanexceedanceofwaterqualityobjectives.

4. Visualmonitoringofrecycledwaterusesites.Duringinspections,thePermitteeisrequiredtomakeobservationsoftherecycledwaterusesitestoensurethatrecycledwaterrequirementsarebeingmet.Thepurposeofthevisualmonitoringistoidentify

anyindicators,suchassurfacerunoff,ponding,brokensprinklerheads,sprinklersoperatingwhenthegroundissaturated,thatcouldresultinaviolationofpermitconditionsandtoimplementanyneededcorrectivemeasures.

F. ReceivingWaterMonitoring

1. SurfaceWater

ReceivingwatermonitoringrequirementshavebeenincreasedoverthemonitoringrequirementsinMRPOrderNo.93‐42(revisedonApril23,2009)asfollows:

a. Monitoringfrequencyhasbeenincreasedfordissolvedoxygen,pH,turbidity,andtemperature.

b. Monthlyrequirementshavebeenaddedforammonia,nitrate,andphosphorus,withamonthlymonitoringfrequency.

2. Groundwater

Atthistime,therearenogroundwatermonitoringrequirementsforthisFacility.

G. OtherMonitoringRequirements

VisualmonitoringrequirementsofthedischargetoGraham’sPond(EFF‐001),fromGraham’sPondtoDutchBillCreek(EFF‐002),andatthereceivingwatermonitoringlocationinDutchBillCreek(RSW‐002)havebeenadded

VII. RATIONALEFORPROVISIONS

A. StandardProvisions

1. FederalStandardProvisions

StandardProvisions,whichapplytoallNPDESpermitsinaccordancewith40CFR122.41,andadditionalconditionsapplicabletospecifiedcategoriesofpermitsinaccordancewith40CFR122.42,areprovidedinAttachmentD.ThePermitteemustcomplywithallstandardprovisionsandwiththoseadditionalconditionsthatareapplicableunder40CFR122.42.TheRegionalWaterBoardhasalsoincludedinthisOrderspecialprovisionsapplicabletothePermittee.TherationaleforthespecialprovisionscontainedintheOrderisprovidedinsectionVII.B,below.

40CFR122.41(a)(1)and(b)through(n)establishconditionsthatapplytoallState‐issuedNPDESpermits.Theseconditionsmustbeincorporatedintothepermitseitherexpresslyorbyreference.Ifincorporatedbyreference,aspecificcitationtothe

regulationsmustbeincludedintheOrder.40CFR123.25(a)(12)allowsthestatetoomitormodifyconditionstoimposemorestringentrequirements.Inaccordancewith40CFR123.25,thisOrderomitsfederalconditionsthataddressenforcementauthorityspecifiedin40CFR122.41(j)(5)and(k)(2)becausetheenforcementauthorityundertheWaterCodeismorestringent.Inlieuoftheseconditions,thisOrderincorporatesbyreferenceWaterCodesection13387(e).

2. RegionalWaterBoardStandardProvisions

InadditiontotheFederalStandardProvisions(AttachmentD),thePermitteeshallcomplywiththeRegionalWaterBoardStandardProvisionsprovidedinStandardProvisionsVI.A.2.

a. OrderProvisionVI.A.2.aidentifiestheState’senforcementauthorityundertheWaterCode,whichismorestringentthantheenforcementauthorityspecifiedinthefederalregulations(e.g.,40CFRsections122.41(j)(5)and(k)(2)).

b. OrderProvisionVI.A.2.brequiresthePermitteetonotifyRegionalWaterBoardstaff,orallyandinwriting,intheeventthatthePermitteedoesnotcomplyorwillbeunabletocomplywithanyOrderrequirement.ThisprovisionrequiresthePermitteetomakedirectcontactwithaRegionalWaterBoardstaffperson.

B. SpecialProvisions

1. ReopenerProvisions

a. StandardProvisions(SpecialProvisionVI.C.1.a).Conditionsthatnecessitateamajormodificationofapermitaredescribedin40CFR122.62,whichincludethefollowing:

i. Whenstandardsorregulationsonwhichthepermitwasbasedhavebeenchangedbypromulgationofamendedstandardsorregulationsorbyjudicialdecision.Therefore,ifrevisionsofapplicablewaterqualitystandardsarepromulgatedorapprovedpursuanttoSection303oftheCWAoramendmentsthereto,theRegionalWaterBoardwillreviseandmodifythisOrderinaccordancewithsuchrevisedstandards.

ii. Whennewinformationthatwasnotavailableatthetimeofpermitissuancewouldhavejustifieddifferentpermitconditionsatthetimeofissuance.

b. ReasonablePotential(SpecialProvisionVI.C.1.b).ThisprovisionallowstheRegionalWaterBoardtomodify,orrevokeandreissue,thisOrderifpresentorfutureinvestigationsdemonstratethatthePermitteegovernedbythisPermitis

causingorcontributingtoexcursionsaboveanyapplicableprioritypollutantcriterionorobjective,oradverselyimpactingwaterqualityand/orthebeneficialusesofreceivingwaters.

c. WholeEffluentToxicity(SpecialProvisionVI.C.1.c).ThisOrderrequiresthePermitteetoinvestigatethecausesof,andidentifycorrectiveactionstoreduceoreliminateeffluenttoxicitythroughaTRE.ThisOrdermaybereopenedtoincludeanumericchronictoxicitylimitation,anewacutetoxicitylimitation,and/oralimitationforaspecifictoxicantidentifiedintheTRE.Additionally,ifanumericchronictoxicitywaterqualityobjectiveisadoptedbytheStateWaterBoard,thisOrdermaybereopenedtoincludeanumericchronictoxicitylimitationbasedonthatobjective.

d. 303(d)‐ListedPollutants(SpecialProvisionVI.C.1.d).ThisprovisionallowstheRegionalWaterBoardtoreopenthisOrdertomodifyexistingeffluentlimitationsoraddeffluentlimitationsforpollutantsthatarethesubjectofanyfutureTMDLaction.

e. WaterEffectsRatios(WERs)andMetalTranslators(SpecialProvisionVI.C.1.e).ThisprovisionallowstheRegionalWaterBoardtoreopenthisOrderiffuturestudiesundertakenbythePermitteeprovidenewinformationandjustificationforapplyingawatereffectsratioormetaltranslatortoawaterqualityobjectiveforoneormoreprioritypollutants.

f. Nutrients(SpecialProvisionVI.C.1.f).ThisOrderestablisheseffluentlimitationsfortotalnitrateandmonitoringrequirementsfortheeffluentandreceivingwaterfornutrients(i.e.,ammonia,nitrate,andphosphorus).ThisprovisionallowstheRegionalWaterBoardtoreopenthisOrderiffuturemonitoringdataindicatestheneedforeffluentlimitationsormorestringenteffluentlimitationsforanyoftheseparameters.

g. SaltandNutrientManagementPlans(SpecialProvisionVI.C.1.g).ThisprovisionallowstheRegionalWaterBoardtoreopenthisOrderifitadoptsaregionalorsubregionalsaltandnutrientmanagementplanthatisapplicabletothePermittee.

2. SpecialStudiesandAdditionalMonitoringRequirements

a. ToxicityReductionEvaluations(SpecialProvisionVI.C.2.a).TheSIPrequirestheuseofshort‐termchronictoxicityteststodeterminecompliancewiththenarrativetoxicityobjectivesforaquaticlifeintheBasinPlan.AttachmentEofthisOrderrequireschronictoxicitymonitoringfordemonstrationofcompliancewiththenarrativetoxicityobjective.

InadditiontoWETmonitoring,thisprovisionrequiresthePermitteetomaintainanup‐to‐dateTREWorkPlanforapprovalbytheExecutiveOfficer,toensurethePermitteehasaplantoimmediatelymoveforwardwiththeinitialtiersofaTRE,intheeventeffluenttoxicityisencounteredinthefuture.TheTREisinitiatedbyevidenceofapatternoftoxicitydemonstratedthroughtheadditionaleffluentmonitoringobtainedasaresultofanacceleratedmonitoringprogram.

b. TechnicalReport(s)RegardingExistingRecycledWaterUseSites.(SpecialProvisionVI.C.2.b)Technicalinformationisneededtoassessexistingrecycledwaterusesitestodeterminewhetherornotrecycledwaterisbeingappliedatnutrientandhydraulicagronomicrates.ThePermitteemustprovideaworkplanandtimescheduleforprovidingthedescribedinsectionVI.C.2.boftheOrder.Theworkplanmustalsocontainatasktosubmitacorrectiveactionplantoaddressanyrecycledwaterusethatisfoundtoexceedagronomicratesortoberesultinginrunoffofrecycledwatertosurfacewaters.ExamplesofhowcompliancecouldbeachievedincludeadjustingapplicationratesattheusesitetoensurethatagronomicratesaremetandimplementingappropriateBMPstominimizethepotentialforrunoff;orrecognizethesiteasalanddisposalsitewithappropriategroundwatermonitoringandpossiblepermitmodificationtoincludeanyneededlanddischargespecifications.

c. ReceivingWaterSpecialStudy(SpecialProvisionVI.C.2.c)requiresthePermitteetosubmitaworkplandescribingastudytoassesstheeffectsofthedischargefromGraham’sPondonDutchBillCreek.ThisstudyisnecessarytoensurethatthedischargeisnotimpactingthebeneficialusesofDutchBillCreek.

d. StoragePondTechnicalReport.(SpecialProvisionVI.C.2.d)requiresthePermitteetoprovidetechnicalinformationforanypondthatisproposedforstorageoftreatedeffluentinplaceofGraham’sPond.Thisrequirementapplieswhetherthefutureproposedpond(s)arenewlyconstructedpondsorexistingpondsnewlyidentifiedforeffluent/recycledwaterstorage.Thisinformationisneededtodeterminewhetherthestoragepondsareadequatelydesignedtominimizethepotentialfortreatedeffluent/recycledwatertocauseadverseimpactstoarealgroundwaterandbeneficialusesthereof.ThePermitteewilleventuallyneedtodemonstratethatstorageoftreatedwastewatermeetstherequirementsoftitle27andisprotectiveofgroundwaterquality.Inaddition,groundwatermonitoringmayberequiredinthefutureifitisdeterminedthatrecycledwaterisbeingappliedatgreaterthanhydraulicornutrientagronomicrates.

3. BestManagementPracticesandPollutionPrevention

a. PollutantMinimizationPlan.ProvisionVI.C.3.aisincludedinthisOrderasrequiredbysection2.4.5oftheSIP.TheRegionalWaterBoardincludesstandardprovisionsinallNPDESpermitsrequiringdevelopmentofaPollutantMinimizationProgramwhenthereisevidencethatatoxicpollutantispresentintheeffluentataconcentrationgreaterthananapplicableeffluentlimitation.

4. Construction,Operation,andMaintenanceSpecifications

a. ProvisionVI.C.4isincludedinthisOrderbecause40CFR122.41(e)requiresproperoperationandmaintenanceofpermittedwastewatersystemsandrelatedfacilitiestoachievecompliancewithpermitconditions.Anup‐to‐dateoperationandmaintenancemanual,asrequiredbyProvisionVI.C.4.boftheOrder,isanintegralpartofawell‐operatedandmaintainedfacility.

5. SpecialProvisionsforMunicipalFacilities(POTWsOnly)

a. WastewaterCollectionSystems(SpecialProvisionVI.C.5.a)

i. StatewideGeneralWDRsforSanitarySewerSystems.TheStateWaterBoardissuedGeneralWasteDischargeRequirementsforSanitarySewerSystems,WaterQualityOrderNo.2006‐0003‐DWQ(GeneralOrder)onMay2,2006.TheGeneralOrderrequirespublicagenciesthatownoroperatesanitarysewersystemswithgreaterthan1mileofpipesorsewerlinestoenrollforcoverageundertheGeneralOrder.TheGeneralOrderrequiresagenciestodevelopsanitarysewermanagementplans(SSMPs)andreportallSSOs,amongotherrequirementsandprohibitions.

Furthermore,theGeneralOrdercontainsrequirementsforoperationandmaintenanceofcollectionsystemsandforreportingandmitigatingsanitaryseweroverflows.InasmuchthatthePermittee’scollectionsystemispartofthesystemthatissubjecttothisOrder,certainstandardprovisionsareapplicableasspecifiedinProvisionsVI.A.2.bandVI.C.5oftheOrder.ThePermitteemustcomplywithboththeGeneralOrderandthisOrder.ThePermitteeandpublicagenciesthataredischargingwastewaterintothefacilitywererequiredtoobtainenrollmentforregulationundertheGeneralOrderbyDecember1,2006.ThePermitteehasenrolledundertheGeneralOrderasrequired.

AllNPDESpermitsforPOTWscurrentlyincludefederallyrequiredstandardconditionstomitigatedischarges(40CFR122.41(d)),toreportnon‐compliance(40CFR122.41(1)(6)and(7)),andtoproperlyoperateand

maintainfacilities(40CFR122.41(e)).Thisprovisionisconsistentwiththesefederalrequirements.

ii. SanitarySewerOverflows.ThisOrderincludesprovisions(ProvisionVI.C.5.(a)(ii),andAttachmentDsubsectionI.C.,I.D,V.E,andV.H.)toensureadequateandtimelynotificationsaremadetotheRegionalWaterBoardandappropriatelocal,state,andfederalauthoritiesincaseofsewagespills.Inaddition,asanEnrolleeunderGeneralOrderNo.2006‐0003‐DWQ,thePermitteeisrequiredtoreportSSOstoanonlineSSOdatabaseadministeredthroughtheCaliforniaIntegratedWaterQualitySystem(CIWQS)andviatelefaxwhentheonlineSSOdatabaseisnotavailable.DetailednotificationandreportingrequirementsforSSOsandsewagespillsarespecifiedinAttachmentEsubsectionE(MonitoringandReportingProgram).ThegoaloftheseprovisionsistoensureappropriateandtimelyresponsebythePermitteetoSSOstoprotectpublichealthandwaterquality.

6. SourceControlProgram(SpecialProvisionVI.C.5.b).Becausetheaveragedryweatherdesignflowofthefacilityislessthan5.0mgd,theOrderdoesnotrequirethePermitteetodevelopapretreatmentprogramthatconformstofederalregulations.However,theproposedOrderincludesrequirementsforthePermitteetoimplementasourceidentificationandreductionprogram.ThePermittee’ssourceidentificationandreductionprogramwillneedtoaddressonlythosepollutantsthatcontinuetobedetectedatlevelsthattriggerreasonablepotential.

Inaddition,theRegionalWaterBoardrecognizesthatsomeformofsourcecontrolisprudenttoensuretheefficientoperationoftheFacility,thesafetyofFacilitystaff,andtoensurethatpollutantsdonotpassthroughthetreatmentfacilitytoimpairthebeneficialusesofthereceivingwater.

7. SludgeDisposalandHandlingRequirements(SpecialProvisionVI.C.5.c).Thedisposalorreuseofwastewatertreatmentscreenings,sludges,orothersolidsremovedfromtheliquidwastestreamisregulatedby40CFRParts257,258,501,and503,andtheStateWaterBoardpromulgatedprovisionsoftitle27,CaliforniaCodeofRegulations.ThePermitteehasindicatedthatallscreenings,sludges,andsolidsremovedfromtheliquidwastestreamarecurrentlydisposedofoff‐siteatamunicipalsolidwastelandfillinaccordancewithallapplicableregulations.SeeFactSheetsectionII.Aformoredetail.

8. StatewideGeneralWDRsforDischargeofBiosolidstoLand(SpecialProvisionVI.C.5.d).ThisprovisionrequiresthePermitteetocomplywiththeState’sregulationsrelatingtothedischargeofbiosolidstotheland.ThedischargeofbiosolidsthroughlandapplicationisnotregulatedunderthisOrder.Instead,thePermitteeisrequiredtoobtaincoverageundertheStateWaterBoardOrderNo.

2004‐0012‐DWQ,GeneralWasteDischargeRequirementsfortheDischargeofBiosolidstoLandasaSoilAmendmentinAgricultural,Silvicultural,Horticultural,andLandReclamationActivities(GeneralOrder).CoverageundertheGeneralOrder,asopposedtocoverageunderthisNPDESpermitorindividualWDRs,implementsaconsistentstatewideapproachtoregulatingthiswastedischarge.

9. OperatorCertification(SpecialProvisionVI.C.5.e).ThisprovisionrequirestheFacilitytobeoperatedbysupervisorsandoperatorswhoarecertifiedasrequiredbytitle23,section3680oftheCCR.

10. AdequateCapacity(SpecialProvisionVI.C.5.f).ThegoalofthisprovisionistoensureappropriateandtimelyplanningbythePermitteetoensureadequatecapacityfortheprotectionofpublichealthandwaterquality.

11. OtherSpecialProvisions

a. StormWaterBestManagementPractices(BMPs)(SpecialProvisionVI.C.6.a).ThePermitteehasdeterminedthattheFacilitydoesnothaveindustrialstormwaterdischargestosurfacewatersandstormwaterBMPsareinplacetodivertstormwaterrun‐onfromthetreatmentfacilitygrounds.TheStatewideGeneralStormWaterPermit(StateWaterBoardOrderNo.97‐03‐DWQ)doesnotrequirefacilitiestoobtaincoverageifstormwateriscapturedandtreatedand/ordisposedofwiththeFacility'sNPDESpermittedprocesswastewaterorifstormwaterisdisposedoftoevaporationponds,percolationponds,orcombinedsewersystems.Therefore,coverageundertheGeneralStormWaterPermitisnotrequired.ThePermitteeshallannuallyinspectandmaintainstormwaterBMPs,andreporttheseactivitiestotheRegionalWaterBoard.

12. ComplianceSchedules(SpecialProvisionVI.C.7)

ThisOrdercontainsacompliancescheduleforthePermitteetoachievecompliancewithfinalirrigation/reclamationspecificationsfortotalnitrogen.ThetimescheduleintheOrderrequiresfullcompliancewithfinaleffluentlimitationsforammoniabyJanuary31,2018.

OthercomplianceschedulesareincludedinCDONo.R1‐2012‐0102tobeadoptedconcurrentlywiththisOrder.

VIII. PUBLICPARTICIPATION

TheCaliforniaRegionalWaterQualityControlBoard,NorthCoastRegion(RegionalWaterBoard)isconsideringtheissuanceofwastedischargerequirements(WDRs)thatwillserveasaNationalPollutantDischargeEliminationSystem(NPDES)permitfortheOccidental

CountySanitationDistrictWastewaterTreatmentPlant.AsastepintheWDRadoptionprocess,theRegionalWaterBoardstaffhasdevelopedtentativeWDRs.TheRegionalWaterBoardencouragespublicparticipationintheWDRadoptionprocess.

A. NotificationofInterestedParties

TheRegionalWaterBoardhasnotifiedthePermitteeandinterestedagenciesandpersonsofitsintenttoprescribewastedischargerequirementsforthedischargeandhasprovidedthemwithanopportunitytosubmittheirwrittencommentsandrecommendations.NotificationwasprovidedthroughthefollowingpostingontheRegionalWaterBoard’sInternetsiteat:http://www.waterboards.ca.gov/northcoast/public_notices/public_hearings/npdes_permits_and_wdrs.shtmlandthroughpublicationinthePressDemocraton[DATE].

B. WrittenComments

Thestaffdeterminationsaretentative.InterestedpersonsareinvitedtosubmitwrittencommentsconcerningthesetentativeWDRs.CommentsmustbesubmittedeitherinpersonorbymailtotheExecutiveOfficeattheRegionalWaterBoardattheaddressaboveonthecoverpageofthisOrder.

TobefullyrespondedtobystaffandconsideredbytheRegionalWaterBoard,writtencommentsmustbereceivedattheRegionalWaterBoardofficesby5:00p.m.onOctober22,2012.

C. PublicHearing

TheRegionalWaterBoardwillholdapublichearingonthetentativeWDRsduringitsregularBoardmeetingonthefollowingdateandtimeandatthefollowinglocation:

Date: December6,2012Time: 8:30a.m.orasannouncedintheRegionalWaterBoard’sagendaLocation: RegionalWaterBoardHearingRoom

5550SkylaneBoulevard,SuiteASantaRosa,CA95403

Interestedpersonsareinvitedtoattend.Atthepublichearing,theRegionalWaterBoardwillheartestimony,ifany,pertinenttothedischarge,WDRs,andpermit.Oraltestimonywillbeheard;however,foraccuracyoftherecord,importanttestimonyshouldbeinwriting.

Pleasebeawarethatdatesandvenuesmaychange.OurWebaddressishttp://www.waterboards.ca.gov/northcoastwhereyoucanaccessthecurrentagendaforchangesindatesandlocations.

D. WasteDischargeRequirementsPetitions

AnypersonaffectedbythisactionoftheRegionalWaterBoardmaypetitiontheStateWaterResourcesControlBoard(StateWaterBoard)toreviewtheactioninaccordancewithWaterCodesection13320andtitle23,section2050oftheCCR.ThepetitionmustbereceivedbytheStateWaterBoardwithin30daysofthedateofthisOrder.Copiesofthelawandregulationsapplicabletofilingpetitionswillbeprovideduponrequest.InadditiontofilingapetitionwiththeStateWaterBoard,anypersonaffectedbythisOrdermayrequesttheRegionalWaterBoardtoreconsidertheOrder.Tobetimely,suchrequestmustbemadewithin30daysofthedateofthisOrder.NotethatevenifreconsiderationbytheRegionalwaterBoardissought,filingapetitionwiththeStateWaterBoardwithinthe30‐dayperiodisnecessarytopreservethepetitioner’slegalrights.IfthePermitteechoosestorequestreconsiderationofthisOrderorfileapetitionwiththeStateWaterBoard,thePermitteemustcomplywiththeOrderwhiletherequestforreconsiderationand/orpetitionisbeingconsidered.Thepetitionmustbesubmittedwithin30daysoftheRegionalWaterBoard’sactiontothefollowingaddress:

StateWaterResourcesControlBoardOfficeofChiefCounselP.O.Box100,1001IStreetSacramento,CA95812‐0100

E. InformationandCopying

TheReportofWasteDischarge(ROWD),relateddocuments,tentativeeffluentlimitationsandspecialprovisions,commentsreceived,andotherinformationareonfileandmaybeinspectedattheaddressaboveatanytimebetween8:30a.m.and4:45p.m.,MondaythroughFriday.CopyingofdocumentsmaybearrangedthroughtheRegionalWaterBoardbycalling(707)576‐2220.

F. RegisterofInterestedPersons

AnypersoninterestedinbeingplacedonthemailinglistforinformationregardingtheWDRsandNPDESpermitshouldcontacttheRegionalWaterBoard,referencethisfacility,andprovideaname,address,andphonenumber.

G. AdditionalInformation

RequestsforadditionalinformationorquestionsregardingthisordershouldbedirectedtoCathleenGoodwinatCathleen.Goodwin@waterboards.ca.govor(707)576‐2687.

ORDER NO. R1-2012-0101 OCCIDENTAL COUNTY SANITATION DISTRICT and SONOMA COUNTY WATER AGENCY NPDES NO. CA0022888

AttachmentF1–RPASummary F‐1

ATTACHMENTF‐1RPASummary

order no. r1 2012 0101 npdes no. ca0023051 wdid...order no. r1‐2012‐0101 occidental county...

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