attachment 34 to gnro-2012/00039 - er reference - mdeq ... · 27/4/2011 · selenium, total -0.007...

Attachment 34 to GNRO-2012/00039

Attachment 34 to

GNRO-2012/00039

ER Reference - MDEQ 2011a (NPDES Permit Rationale) Rationale for Reissuance

PERMIT RATIONALE FOR REISSUANCEEntergy Mississippi Ine, Grand Gulf Nuclear Station

Claiborne CountyPort Gibson, Mississippi

Water NPDES No. MS0029521April 27, 2011

FACILITY INFORMATION

Facility Name: Entergy Mississippi Inc, Grand Gulf Nuclear Station

Facility Address: 7003 Bald Hill Road

Port Gibson, MS 39150

Permit No.: MS0029521

SIC: 4911

Permit Writer: Thomas Kelly

EPD Branch: Energy and Transportation Branch

[I. NATURE OF BUSINESS

Nuclear Powered Steam Electric Plant. The facility operations fall within SIC Code 4911 -Steam Electric

Power Generation. This facility is classified as a NPDES major source.

Ill. EFFLUENT AND RECEIVING STREAM FLOW DATA

Ektemal Outfalls

001 - Discharged from the Mixing/Discharge Basin. Effluent from this outfall is combination of internal

outfalls(s) 002,004,005,006 and 011. This outfall has a maximum 30 day flow of 12.05MGD and

discharges to the Mississippi River.

The Mississippi River is classified as "Fish and Wildlife". The 7QI0 flow is 82,082 MGD.

013 - Discharged from Sediment Basin A - Effluent from this outfall consists of the combined discharge

from the Bechtel Shop; Vehicle Maintenance Shop; Ice House Condensate; Standby Service Water

Leakage; Construction and Site Runoff; Once Through Cooling; Site Processing Facility HVAC;

Internal Outfall 010 (Sanitary); Internal Outfall 016 (Energy Service System). This outfall has a

maximum 30 day flow of 0.8 MGD.

2082 PER20070001 I

Outfalls 013 discharge to an unnamed creek thence to Hamilton Lake. The receiving stream is c, ssified as

"Fish and Wildlife" and has a 7Q10 flow of 0 MOD.

014- Discharge from Sedimentation Basin B - This discharge is a combination of discharges thlnm Outfall

007; Standby Service Water Leakage and Releases; Intermittent Circulation Water Basin C4verflows;

and Storm water Runoff. This outfall has a maximum 30 day flow of 0.07 MOD.

Outfall 014 discharges to an unnamed creek thence to Hamilton Lake. The receiving stream is classified as

"Fish and Wildlife" and has a 7Q10 flow of 0 MOD.

Internal Outfalls

002 - (Categorical: Cooling Tower Blowdown) - Natural draft and auxiliary cooling Tower Btowdown.

This outfall has a maximum 30 day flow of 11.64 MGD and discharges via Outfall 00.

004- (Categorical: Cooling Tower Blowdown) - Unit One standby service water (SSW- A). this outfall

has a maximum 30 day flow of 4.16 MOD and discharges via Outfall 001.

005 - (Categorical: Cooling Tower Blowdown) - Unit Two standby service water (SSW-B). 74his outfall

has a maximum 30 day flow of 5.97 MOD and discharges via Outfall 001.

006 - (Categorical: Low Volume) - Low volume waste basin including demineralizer wastewa~er, carbon

filter backwash, and water treatment building sump. This outfall has a maximum 30 day flow of

0.65 MOD and discharges via Outfall 00 1.

007 - (Categorical: Low Volume)- Miscellaneous Wastewaters discharged into Sedimentati n Basin B

comprised of Administrative Building Drains; Yard and Storm Drains; Fire Water Pump House;

Oily Waste Sumps; Ionics Reject Water; Turbine Building Cooling Water BlowdovJn; HVAC

Blowdown; Air Conditioner Once Through Cooling; Outage Air Compressor Onc4 Through

Cooling; Intermittent Standby Service Water and Plant Service Water leakage and sma I releases.

This outfall has a maximum 30 day flow of 0.299 MOD and discharges via Outfall 014.

010- Outfall 010 (Non-categorical) - Sanitary Wastewater. This outfall has an average flo, of 0.012

MOD and discharges via Outfall 013.

2082 PER20070001 2

01 - (Non-categorical) - Treated Liquid Rad Waste Water. This outfall has a maximnum30 day flow of

0.049 MGD and discharges via Outfall 001.

016- (Non-categorical) - Miscellaneous Wastewaters from the: Energy Services Center Inclusive of

Water Softener Backwash, Air Conditioning.Cooling Tower Blowdown and Storm Water Runoff.

This outfall has a maximum 30 day flow of 0.0698 MGD and discharges via Outfal. 013.

IV.. 363(d) ISSUES

T~is~is an existing discharger with no modifications occurring to the facility's operations therefore, there are no

363(d) concems,

V. 1TPE OF WASTEWATER TREATMENT:

00 ! - Commingling of waste streams from Outfalls 002, 004, 005, 006, 0 11, and the cooling tower makeup

bypass.

002- No treatment.,

004 - No treatment.

0O5- No treatment.006 - No treatment.

007 - Oil/Water separation provided for selected internal waste streams.

016- Sanitary Wastewater Treatment Plant with treatment including activated sludge, aeration, chlorination

and dechlorination.

0 11 No treatment.063.-. Oil/Water.separation provided forselectedintemal waste streams. Settling:provided forcommingled

wastewaters.

0o4 - Oil/Water separation provided for selected internal waste:streams. Settling provided forcommingled

wasteWaters.

0116 . No treatment.

VI. STATE APPLICABLE GUIDELINES

[ Wastewater Regulations for National Pollutant Discharge Elimination System (NPDES, Permits.

Underpground Iniection Control (UIC) Permits., State Permits, Water OualitY Based Effluent

Limitations. and Water Ouality Certification. hereafter referred to as WPC-J.

2082 PER2007000O 3

12. State of Mississippi Water nualitv Criteria for Intrastate. Interstate, and Coastal Water dby k nn Cnmiun nnFnirnmunt1 )Il~iv l~the 9 9ffl~ ~re Mf rfprrpdtn

by MiSSiSSi Di CO i ion on Environ ental, ualitv: October 24 20021 he after fe-dito asWPC-2.

VII. EPA APPLICABLE GUIDELINES

40 CFR Part 423 - Steam Electric Power Generation Point Source Category; Sections 423.12

Practicable Control Technology Currently Available) and 423.13 (BAT-Best Available T

Economically Available). See Attachment A.

VIII. DATA FROM APPLICATION FORM (2C, 2E):

External Outfalls:

3EPT-Best

chnology

Maximum Daily Value

Parameter Outfall 001 Outfall 013 Outfall 014 i

BODs 1.2 mg/I 1.2 mg/I 1.0 mg/I _!

COD 89 mg/I 32 mg/I < 20.0 mg/ItTOC 8.3 mg/I 5.9 mg/i 4.4 mg/I

TSS 5 mg/I 24 mg/I 3.0 mg/I

Ammonia (as N) 0.1 mg/I <0.1mg/I 0.12 mg/l IFlow 24.24 MGD 0.8 MGD 0.07 MGD

Temperature (Winter) 30.7 OC 14.5 °C 17.3 OC

Temperature (Summer) 44.9 °C 27.1 °C 28.6 °C

pH 8.31 S.U. 7.98 S.U. 8.64 S.U.

Bromide 0.74 mg/I 1.06 mg/I 0.25 mg/I

Chlorine, Total Residual -- -- --

Fecal Coliform 180 col./I 00 ml 110 col./l00 ml 110 coL/100 n__

Fluoride 0.57 mg/I 0.17 mg/I

Nitrate-Nitrite 0. 10 mg/I -- --

Nitrogen, Total Organic (as N) 0.86 mg/I 0.48 mg/I --__

Phosphorus 0.97 mg/I 0.18 mg/I 0.28 mg/I _

Sulfate (as SO 4) 310 mg/I -- 18.3 mg/l _ _

Barium, Total 0.25 mg/I 0. 12 mg/I 0.07 mg/I

Boron, Total 0.15 mg/I -- -

Iron, Total' 2.39 mg/L 0.27 mg/I 0.10 Mg/I _

Magnesium, Total 43.9 mg/I 24.0 mg/I 15.7 mg/I _

2082 PER20070001 4

Maximum Daily Valu&

Parameter Outfall 00 L., Outfall1 013. Outfall 014

Manganese, Total .0.37 mg/I 0.28mg/I --

Antimony, Total <0.0005 mg/l < 0.005 mg/i < 0.005mg/I

Arsenic, Total' 0.008 mg/I 0.012 mg/I 0.015 mg/I

Beryllium, Total <0.001 mg/I <0.001 mg/I < 0.001 mg/ICadmium, Total < 0.005 mg/l <0.005 mg/I < 0.005 mg/I

Chromium, Total < 0.002 mg/I < 0.002 mg/I < 0.002 mg/I.

Copper. Total < 0.010 Mgt] < 0.010mg/I• 0.010 mg/i

Lead,.Total < 0.001 mg/i < 0.001 mg/I 0,00 1 mg/I

Mercury, Total' 6.3e-6:mg/I 2.0e-6 mg/I 2.3e-6 mg/I

Nickel, Total < 0.02 mg/I < 0.02 mg!I < 0.02 mg/I

Selenium, Total <0.005 mg/I <0.005 mg/I <0.005 mg/I

Silver, Total <0.0003 mg/I <0.0003.mg/! <0.0003 mg/I

Thallium, Total <0.001 mg/I <0,001 mg/It <0.001 mg/l

Zinc, Total' 0.356 mg/l <0.01 mg/I <0.01 mg/I

Bis (2-Ethyl-hexyl) Phthalate! 0.017 mg/I .. _

Internal Outfalls:.

Maximum Daily Value _

Parameter Outfall 002 Outfall 004 Outfall 005 Outfall 006

qOD5 < 1.0 mg/l <1.0mg/I 1.2 mg/I 15 mg/i

COD .30 mg/I 55 mg/I 36 mg/l: < 20,0 mg/I

1kOC 10mg/I 11.7mg/l 12.2 mg/i 4.6 mg/I

iss < 1.00 mg/i 5 mg/l: 4 mg/I 16 mg/I

4mmonia (as N): < 0.310 mg/l 0.17 mg/I 0.23 mg/l < 0. 10 mg/I

Plow 13.06 MGD 6.66 MGD 5.97 MGD 0.65 MGD

Temperature (Winter) 17.4 0C 16.1 *C 18.8 °C 18.9 *C

Temperature (Summer) 28. 1°C 26.2 *C. 22.6 °C 29.2 'C8.35 S.U. 7.51 S.U. 6.96 S.U. .8,51 SU;

..romide 0.76 mg/I 14.4 mg/I 12.1 mg/l 0.52 mg/I

qhlorine, Total Residual .0.17 mg/I.

6ecal Coliform. 180 coui00 ml nil

Flluoride 0.66 mg/I 032 mg/t 0.33 mg/I 0.35 mg/l

Nitrate-Nitrite 1.10 mg/I 0.28 mg/i 0.63 mg/I

Nitrogen, Total Organic 0.75 mg/I. 1.27 mg/I 1.05 mg/I 0.40 mg/l.

I'losphorus .1.09 mg/i .2.86 mg/! 3.48 mg/l 3.38 mg/l

Sulfate 388 mg/l 202 mg/I 257 mg/I 3370 mg/IlAluminum, Total. - 5.46 mg,/

2082 PER2007000I 55

Maximum Daily Value.

Parameter Outfall 002 Outfall 004 Outfall O05 Outfall 006

Barium, Total 0.32 mg/I 0.09 mg/I 0.09 mg/I 0.04 mg/I -

Boron, Total 0.23 mg/I 0.12 mg/I 0.11 mg/! .

Cobalt, Total -.. 0.01 mg/i.

Iron, Total 12.61 mg/I 2.47 mg/i. 3.16 mrg. 48.6 mg/1

Magnesium, Total 53.5 mg•/ 24.7 mg/i 25.9 mg/ 54.3 mg/I

Manganese, Total 0.34 mg/I 0.08 mg/l 0.22 mg/[ 1.47 mo/il

Arsenic, Total 0.008 mg/I 0.006 mg/I 0.012 m&I

Cadmium, Total - 0.0008 m VI

Chromium, Total - - 0.125 M I

Copper, Total - 0.039 mg/I 0.1: 13 mg/l .0.098 m I

Lead, Total 0.003 mg I

Mercury,-Total 3.9e-6 mg/ 1.23e-5 mg/I 2.98e-5 mg/I 5.5e-6 m ..

Nickel, Total 0.008 mg/I •0.16 0.13 mg!I 0.136m&i

Selenium, Total -0.007 m

Zinc, Total 0.78 mg/I 0.59 mg/I 0.62 mg/I 0.270 m4-Nitrophenol - 0.283 mg/I - _

Benzidine 1.51 mg/I ..

4-Bromophenyl Phenyl Ether - 0.006 mg/I l

Maximum Daily Value

Parameter Outfall 007 Outfall 011 Outfall 01 6 Outfall 0 10BOD5 3.0 mg/I < 2.0 mg/L < 1.0 mg/L 11.70 mog!:.

COD < 20.0 mg/l < 4.32 mg/L 80 mg/L < 20 mg/iTOC 4.30 mg/l < 0.33 mg/I 10.1 mg/I 3.30 mg/I1

TSS 47.mg/I 1.55 mg/L I1 mg/L 23.

Ammonia (as N) <0.1 mg/I 0.042mg/L <0.1 mg/L <0.1 mgotL

Flow 0.5472 MGD 0.0762 MGD 0.0698 MGD 0.06 M bGTemperature (Winter) 20.6 0C 31.2 0C 15.8 OC 22.20 OCTTemperature (Summer) 28.1 0C 31.0 1C 29.6 0C. 28.90 *C _

pH, 8.79 s.u. 7.75 s.u. 8.80 s.u:. 8.32.s.u.i

Fecal Coliform -_ 1.2000 coldI1.00 ml 20 col.1001WmBromide 5.29mg/ -

Chloride, Total Residual -- 0.21 mg/l 0. 16 mg/I

Fluoride 0.30 mg/I - 0.30 mg/L -

2082 PER20070001 6

Maximum Daily Value

Parameter Outfall 007 OutfallOI 1 Outfall 016 Oulfall 010

Nýitrate-Nitrite 0.85 mg/i - 0.99 mg/L -Nitrogen, Total Organic (as 0.22 mg/I 0.042 mg/I 0.52 mg/L -

N)Chlorine, Total Residual 1.43 mg/i 0 mg/I - -

Oil and Grease <637 mg/I - < 2.4 mg/I

Phosphorus 0.24 mg/[ 0.74 mg/L 0.17 mg/I _

Alpha, Total: 4.63 pCi/I - _-

Beta,. Total ,- 725 pCi/I -

Radium, Total - 2.55 pCi/I -

Radium 228, Total -- 1.05 pCi/A --

Sulfate (as SO4) 35.6 mg/I - 27.6 mg/I _

Barium, Total: 0.08 mg/I - 0.42 mg/I _.

Boron, Total 0.04 mg/I - 0.03 mg/I

Cobalt, Total - 0.111 mg/i. -

kon, Total 0.23 mg/I 39.5 mg/L 0.08 mg/L _

Magnesium, Total 32.2 mg/l - 146 mg/I -

Molybdenum, Total, , 0. 149 mg/i -

Manganese, Total .. 0.'06 mg/I

Arsenic, Total - 0.027 mg/L -

Chromium, Total 0.004 mg/I - 0.006 mg/L _

Copper, Total 0.01 2 mg/I 0.599 mg/L -

Mercury, Total 8.7e-6 mg/I - 2.3e-6 mg/L _

Thallium, Total - 0.336 mg/I -

Zinc, Total 0.042 mg/I I _- .0.013 mg/I _

The parameters listed above were reported at a concentration greater than the appropriate minimumquantification level (MQL) listed in Exhibit D of the WPC-I regulations. All other parameters listed on theForm2C application are not shown due to one of the following reasons: (I) testing was not required, (2) theparameters were believed absent, (3) the reported concentrations were non-detect or less than the appropriateMIL for each parameter tested.

'These parameters have been included in the External Outfaill 001 toxicity screening procedureprovided in Attachment B.

ViII. WATER QUALITY LIMITATIONS BASED ON WASTELOAD ALLOCATION

None

,2082 PER20070001 7,

IX. CATEGORICAL LIMITATION CALCULATIONS

Not Applicable

X. TOXICITY SCREENING

See Attachment B

X1. PROPOSED FINAL LIMITATIONS

1. Outfall 001 - ExternalAverage Permit Limitations:

Water ProposedCategorical Quality Present Permit Permit

Outfall Parameter Limitation Limitation Limitation Limitation Basis001 Flow (MGD- Report Report Eng. Jidgment001 Temperature IF -- -- Report Report Eng. J dgent001 Chlorine, Free 0.2 mg/I 0,2 mg/I 0.2 mg/I Categ~rical

Available001 pH - 6.0 s.u. 6.5 s.u. 6.0 s.u. WPC-_ _

Maximum Permit Limitations:


Outfall Parameter Limitation Limitation Limitation Limitation Basis001 Flow (MGD) -RReport eport Eng. JAdgment001 Temperature *F Report Report Eng. J~dgment

Chlorine, Free001 Available 0.5 mg/I 0.5 mg/I Categorical

001 pH - 9.0 s.u. 9.0 s.u. 9.0 s.u. WpC-2

2. Outfall 002 - Internal

Average Permit Limitations:


Outfall Parameter Limitation Limitation Limitation Limitation Basis.002 Flow (MGD) -- -- Report Report Eng. .,udgment

002 AiablChlorine Free 0.2 mI 0.2 mg/I 0.2 mg/I Categ rical____Available 9P_____________ ________

002 Chlorination Duration -- . Report Report Eng. Judgment002 Zinc, Total Recoverable 1.0 mg/I -- 1.0 mg/I1.0 mj l Categbrical

2082 PER20070001 8

Maximum. Permit Limitations:

Water ProposedCategorical Quality. Present Permit Permit

Outfall Parameter Limitation Limitation- Limitation: Limitation Basis002 Flow (MGD). - ... _- Report Report Eng. Judgment.

002 Chlorine, Free. 0.5 Mgt[ 0.5 mg/i 0.5 mg/I CategoricalAvailable 0_-_5_5_a r

002 Chlorination.Duration 120 min - 120 min 120 min Categorical002: Zinc, Total Recoverable 1.0 mg/I 1.0 mg/I 1.0 mg/l Categorical.

3I OUtfall:004 - Internal

Average Permit Limitations::

Water Proposed,Categorical Quality Present Permit Permit

Outfall lOarameter Limitation Limitation Limitation. Limitation Basis004 Flow (MGD). - - Report Report Eng. Judgment

004 Chlorine, Free 0.2 mg/I - 0.2mg/i. 0.2 mg/l CategoricalAvailable. • " .__"

004 Chlorination Duration .... Report Report Eng. Judgment004 Zinc, Total Recoverable 1.0 mg/I - 1.0 mg/I 1.0 ral! Categorical



Outfall Parameter Limitation Limitation Limitation Limitation; Basis004 , low (MGD) . -- ReportReport Eng. Judgment

C~hlorine,.Free004 Chloinebre 0.5 mg/I - 0.5 mgIl 0.5 mg/I Categorical

____Available_______________________

004 Chlorination Duration 120 min - 120 min 120 min Categorical004 Zinc, Total Recoverable 1.0 mg/I 1.0 mg/I I,0 rg!! Categorical

4. Outfal1 005 - Internal.

Aerage Permit Limitations:

Water ProposedOutfall Parameter Categorical Qualitye Present Permit Permit BasisLimittion Basisitaio

Limitation QLitato Limitation Limitation_,005 Flow (MGD) -- Report R Eng. Judgment

.. .. Chlorine, .Free. ".....005 Avaiae F 0.2 mg/I 0.2 mg/l 0.2 mg/I Categorical

005: Chlorination Duration . ... Report Report Eng.: Judgment005 Zinc, Total Recoverable] 1.0 mg/I " 1.0 mg/I . l Categorical

2082 PER20070001'. 9.


Water Proposed*Categorical Quality Present Permit Permit

Outfall Parameter Limitation Limitation Limitation Limitation Basis _

005 Flow (MGD) -- . Report Report Eng. Jddgment

005 Chlorine, Free 0.5 mg/I -- 0.5 mg/I 0.5 Mg/! CategoricalAvailable

005 Chlorination Duration 120 min -- 120 min 120 min Categ ical005 Zinc, Total Recoverable 1.0 mg/I - 1.0 mg1.0 mg/I Catego rical



Categorical Water Present Permit ProposedOutfall Parameter Limitation Quality Limitation PermitaBaoLimitation Limitation006 Flow (MGD) - - Report Report Eng. J dgment006 Oil and grease 15 mg/I 15-I mg/mg5 I CategRlrical

Solids (Total006 Suspended) 30 mg/I 30 mg/I 30 mg/I Categgrical


Water Pr sedCategorical Present Permit ropo

Outfall Parameter Limitation Permit Basisn Limitation Limitation006 Flow (MGD) -- - Report Report Eng. Jqdgment006 Oil and grease 20 mg/I 20 20 mg0 mg/I Categ rical

006 Solids (Total 100 mg/I 100 mg/I 100 mag/I Categ rival____Suspended) ______ ____________________________

T




Outfall Parameter Limitation Limitation Limitation Limitation BasisI007 Flow (MGD) -- . Report Report Eng. J14dgment007 Oil and grease 15 mg/I 15 mg/I !5 mg/I Categcrical

Solids (Total007 Suspended) 30 mg/I 30 mg/I 30 mg/I Categdrical

007 Residua Total - Report Report Eng. JhdgmentResidual 6

1007 pH 6.0 s.u. 6.5 s.u. 6.0 s.u. WPC-4

2082 PER20070001 10


OutfallIParameterCategorical! Water Present Permit ProposedQuality Permit Basisi Oufal: PramterLimitation Limitation.Limitation; Limitation

007 Flow (MGD) - - Report Report Eng. Jud4Gment007 Oil and grease 20 mg/! 0m m Categorical

007 Solids (Total 100 mg/I - 100 mg/I IO0 mg/I Categorical____Suspended)____________________________ _________

Chlorine, Total:007 Residual - Report Repor Eng. Judgment

007 pH 9s9.0 S.u. .0 su. 9.0 s.u. WPC-2

7. Outfall 010- Internal


Categorica ProposedWater Quality Preesent Permit Permit

Outfall Parameter Limitation Limitation Limitation Limitation Basis010 Mlow (MGD) - - Report Report, Eng. Judgmentold IOD Dy). 30 mg/ 30 mg/i Domestic

0(D)m 3Guidelines

010 Solids (Total Suspended) - - 30 mg/I 30 mg/I Domstic.. _ _,_Guidelines

'010 ihlorine, Total Residual - - Report Report Eng. Judgment

010. lecal Coliform, 200 col,/100 ml - 200 col.1!00 mi WPC-2(summer)010 Fiecal Coliform, (winter) -2000 col./100 2000 col 100 2000 co!JI00 ml WPC-2

___ ___ _ l ml __ _ _ _ _ _ _ _ _ _ _ _ _ _ _

010 pH - 6.0 s.u. 6.5 s.u. 6.0.s.u. WPC-2.

SMaximum Permit Limitations:

Categorica ProposedI Water Quality Present Permit Permit

Outfall Parameter Limitation Limitation Limitation Limitation Basis..

010 1llow (MGD) Report Report Eng. Judgment

•010 BOD (5-Day). - 45 mg/I 45 mg/I GuDestic.... Guidelines

- 45Domestic.010 Solids (Total Suspended) 45 mg/l. 45 Mg/ Guidelines

010 qhlorine, Total Residual - - 0.5 mg/i 0.5 mg/I Eng. Judgment

010 Fecal Coliform, 400 col./100 ml - 400 col.!100 ml WPC-2(summer)_ _

010 Fecal Coliform, (winter) -. 4000 col./100 4000 coIl100 4000 col./100 ml WPC-2130___ 9.0_______ml ml 9.0s ___ ____ _ ._..._..010 p~-l -- 9.0s.u. 9.0s.u.. 9.0s.u. WPC-2 . ...

2082 PER2007000 1: 11

S. Outfall 0 11 - InternalAverage Peanit Limitations:

Ouitfall Parameter Categorical: Water Quality Present Permit PrmitsedsiOutfa PrameerLimitation Limitation Limitation Permit Basis•__•__•_ _Limitation _

0oi Flow (MGD). - - Report Report Eng.] dgxnentSolids (Total

01 Soidspend ( - Report Report Eng. Jldgment..Suspended)


Water Present Permit ProposedOutfall Parameter iii Quality Limitation Permit BasisLimitation Limitation

O.ill "Flow (MGD)" Report Report. Eng. Jdgient

oil .Solids (TotalSuspended) 30 mg/i 30 mg/l Eng. Jidgment

9. Outfall 0,13 - ExternalAverage Permit Limitations:.


Outfall Parameter: Limitation Limitation Limitation Limitation. Basis013 Flow (MGD) " - Report Report Eng. Jidgment

Solids (Total013 Suspended) - - Report Report Eng. J idgment. . . . S u s e n e d . .. .•:............... . ... . .; .. ..

013 1 p11 - 6.0 s.u. 6.5 s.u. 6.0 s.u. WPC-2.0.13 Zinc, Total Recoverable -_ " 0.065 mg/I - Report K, Eng. Jhdgment

Maximum Permit Limitations*


Outfall Parameter Limitation Limitation Limitation Limitation Basis!013. Flow (MGD) - - Report Report Eng. Yudgment

Solids (Total013 Suspended) - - Report Report Eng. Judgment

013 pH . - 9.0 s.u. 9.0 s.U. 9.0 s.u. WPC-2013 Zinc, Total Recoverable -j 0.065 mg/I - 0.065 mg/i: WPC2

10. Outfall 014Average Permit Limitations:


Outfall Parameter Limitation Limitation. Limitation..... Limitation Basis:014 Flow (MGD) - - Report Report Eng. Judgment014 Solids (total Report Report Eng. Judgment.

014 Zinc, Total Recoverable - ... . . Report Eng. Judgment014 pH - 6.0 s.u. 6.5 s.u. 6.0 s.u. WPC-2

2082 PER2007000t1 12



Outfall Parameter Limitation Limitation Limitation Limitation Basisl014. Flow (MGD) - Report Report Eng. Judgment014 Solids (Total

0uspended). - - Report Report Eng. Judgment

014 Zinc, Total Recoverable - 0.065. mgtl -- 0.065 mg/l WPC-2014 pH - 9.0 s.u. 9,0 s.u. 9.0 s.u. WPC-2

11. Outfall 016Average Permit Limitations:


Outfall Parameter Limitation Limitation Limitation Limitation Basis016 Flow (MGD) - Report Report Eng. Judgment0.16 Chlorine, Total

Residual -- - Report Report Eng. Judgment016 pH - 6.0 S-u. 6.5 s.u. 6.0 s.u. WPC-2



Outfa1l Parameter Limitation Limitation Limitation Limitation Basis016 Flow (MGD). - Report Report Eng. Judgment

Chlorine, Total

016 Residual -- 0.5 mg/I 0.5 mg/I Eng. Judgment:

016 pH 9.0 s.u. 9.. 9.0 s 9.0 s.U. WPC-2

Total Recoverable Iron

Total Recoverable Iron shall be monitored at Outfall 013 on a monthly basis, utilizing 24-hour composite sampling,,

until 12 monthly samples have been: collected., Sampling should begin following the effective re-issuance date of this

permit and shall be representative of all 4 seasons upon completion. Total Recoverable Iron shall be analyzed using

EPA method 200.8 or an approved equivalent method with a MQL of 10 micrograms/L.

Total Recoverable Arsenic

Total recoverable Arsenic shall be monitored atOutfall 014 on a monthly basis, utiiizing.24-hour composite sampling,

until 12 monithly samples have.been collected. Sampling should begin following the effective re-issuance date.of this:

permit and s all be representative of all 4 seasons upon. completion. Total Recoverable Arsenic shall be analyzed using

EPA method 200.8 or an approved equivalent method with a MQL of 0.5 micrograms/L.

2082:PEP,26070001 13

Total Recoverable Copoer

Total Recoverable Copper shall be monitored at Outfall 014 on a monthly basis, utilizing 24-hour compositejsampling,

until 12 monthly samples have been collected. Sampling should begin following the effective re-issuance d ite of this

permit and shall be representative of all 4 seasons upon completion. Total Recoverable Arsenic shall be anal, zed using

EPA method 200.8 or an approved equivalent method with a MQL of 1.0 micrograms/L.

Once the monitoring for Total Recoverable Iron, Total Recoverable Arsenic and Total Recoverable Copper has been

completed, a report shall be submitted to MDEQ listing the analytical result and date of all sampling eventi. This report

shall be sent the Environmental Permits Division and should not be combined with the Discharge Monitoring Report

(DMR) submittal. The NPDES permit may be modified if data indicates a violation of water quality standards.

MONITORING TYPE AND FREQUENCY

" "Total residual Chlorine (TRC)" shall be measured at Outfalls 007 and 010 twice per month utilizing drab sampling

and reported on a monthly basis. TRC shall be measured at Outfall 016 twice per quarter utilizing grab •ampling andreported on an annual basis.

" "Free Available Chlorine (FAC)" shall be monitored at Outfall 001 during outages when the Natural Draft andAuxiliary Cooling Towers have no load and the Plant Service Water (PSW) bypasses the tower and discl arges directlyto the Discharge Basin through outfall serial no. (OSN) 001, which shall be monitored continuously with multiple grabsamples taken every 30 minutes following commencement of the bypass until no chlorine is detectabli; Outfall 002continuously utilizing multiple grab samples and reported on a monthly basis. Multiple grab sampling hall consist ofa series of grab samples taken every 30 minutes following startup of blowdown following chlorine addition until notchlorine is detectable; Outfall 004 and 005 once per batch discharge during operation utilizing multiple grab samples

and reported on a monthly basis. Monitoring shall be performed daily whenever a batch is dischargedf Initiation ofdischarge shall not occur until a series of instantaneous reading indicate the discharge shall be in compliance with

permit limitations. Multiple grab sampling shall consist of a series of grab samples taken every 30 minites following

startup of blowdown following chlorine addition until not chlorine is detectable.

* "Chlorination duration" shall be monitored at Outfalls 001, 002,004,005 daily and reported on a monthly basis.

* "Flow" shall be monitored at Outfalls 001 continuously utilizing pump logs and reported on a monthly basis; Outfall

002 twice per month utilizing instantaneous sampling and reported on a monthly basis; Outfalls 004, 00S and 006 onceper batch discharge during operation using instantaneous sampling and reported on a monthly basis; Ou fall 007 twice

per month utilizing instantaneous sampling and reported on a monthly basis; Outfall 010 continuou ly utilizing a

continuous recorder and reported on a monthly basis; Outfall 011 continuously utilizing a pump log anc reported on amonthly basis; Outfall 013 quarterly utilizing instantaneous sampling and reported on an annual basi; Outfall 014

quarterly utilizing instantaneous sampling and reported on an annual basis.

2082 PER20070001 14

* "Total Recoverable Zinc" shall be monitored at Outfall 002 twice per month utilizing 24-hour composite

sampling and reportedon a monthly basis;. Outfall 013 and 014 monthly utilizing 24-hour composite sampling and

reported. on a quarterly basis; Outfalls 004 and 005 once per batch discharge during operation utilizing composite..sampling and reported on a monthly basis. If the basin has been re-circulated for a timeframe ofno less than four (4)

hours to-allow for adequate mixing with each quadrant, a composite will be defined as the combined sample ofthe four(4) grab samples from each: quadrant of the basin. If the basin is not re-circulated for a sufficient period of time to

allow for adequate mixing within the quadrants, a composite will be defined as the combined sample of the three (3).

individtal samples collected at the beginning, middle, and end of the discharge for each batch discharge.S •"Total Recoverable Iron" shall be monitored at Outfall 013 monthly utilizing 24-hr composite sampling until 12

monthly, samples have been collected. Upon completion of the monitoring, the monitoring results shall be submitted to

MDEQ within 2 years from the effective issuance date of the permit.

"Total Recoverable Copper" shall be monitored at Outfall 014 monthly utilizing 24-hr composite samplinguntil12 monthly samples have been collected. Upon completion of the monitoring, the monitoring results shall besubmitted to MDEQ within 2 years from the effective issuance date of the permit.

a "Total Recoverable Arsenic" shall be:monitored at Outfall 014 monthly utilizing 24-hr composite sampling until

12 monthly samples have been collected. Upon completion of the monitoring, the monitoring results shall besubmitted to MDEQ within 2 years from the effective issuance date of the permit.

"Oil and Grease"! shall be monitored at Outfall 006 once per batch discharge during operation utilizing grab

sampling and reported on a monthly basis; Outfall 007 twice per month utilizing grab sampling and reported on a

monthly basis.

&"PH" shall be monitored at Outfalls 001 weekly utilizing grab sampling and reported on a monthly basis; Outfal1010

twice per: month utilizing grab sampling and reported on a monthly basis: Outfall 01 3 and 014 quarterly utilizing grab

sampling and reported on an annual basis.

* "Temperature (Deg. F)" shall be monitored at Outfall 001 continuously utilizing a continuous recorder and

reported on a monthly basis.

0 "Fecal Coliform" shall be, monitored at Outfall 0 !0 twice per month utilizing grab sampling and reported on a monthly

basis.

* "Biochemical oxygen demand, 5-day" shall be monitored at Outfall010 twice per month utilizing 24-hour composite

sampling and reported on a monthly basis..,

a "TSS" siall be monitored at Outfall 007 twice per month utilizing grab sampling and reported on a monthly basis;

Outfall (d 10 twice per month utilizing 24-hour composite sampling twice per quarter and reported on a monthly basis;

Outfall 011 once per month utilizing grab sampling and reported on a monthly basis; Outfall 013 and 014 quarterly

2082 PER20070001. 15

utilizing grab sampling and reported on an annual basis.

XII. BASIS FOR PROPOSED PERMIT LIMITATIONS

Total Suspended Solids (TSSM

The average and maximum TSS limits of 30 mg/I and 45 mg/I are based on secondary treatment standards and

engineering judgment. Secondary treatment standards describe the minimum effluent quality attainable by econdary

treatment for sanitary wastewater [40 CFR 133.102].

At Outfall 011 the average and maximum TSS limits of "Report" and 30 mg/I are based on engineeringjud ment. At

Outfalls 013 and 014 the average and maximum TSS limits of "Report" are based on engineering judgmei t.

Oil & Grease

The average and maximum effluent limit of 15 mg/I and 20 mg/I are categorical limitations defined in 40 CfR 423.12

(BPT) for low-volume wastewater.

Total Residual Chlorine (TRC)

The average and maximum TRC limits of "Report" and 0.5 mg/I placed on outfalls 010 and 016 are based on

engineering judgment.

At Outfall 004, the average and maximum "Report" only limits is based on engineeringjudgment.

Chlorination Duration

The duration of chlorination limit of 120 minutes per day per unit is a categorical limitation defined in 40 CFR 423.12

(BPT) and 40 CFR 423.13 (BAT).

Temperature (EF)

The average and maximum temperature limit of "Report" only is based on engineering judgment.

Thermal Mixing Zone

The receiving water shall not exceed a maximum water temperature change of 2.8 degrees Celsius (5.0 degrees Fahrenheit)

relative to the upriver temperature, outside a mixing zone not exceeding a maximum width of 60 feet from the river edge

2082 PER20070001 16

and a maximum length of 6,000 feet downstream from the point of discharge, as measured at a depth of 5 feet. The river

edge shall be defined as being no further east than the mouth of the barge slip. The maximum water temperature shall not

exceed 32.A degrees Celsius (90 degrees Fahrenheit) outside the same mixing zone, except then ambient temperatures

approach or exceed this value.

Thermal MWdeling:

Thermal monitoring shall be performed any time the river stage is less than 0.5 feet (Vicksburg gauge) during winter

months (November-April) or, is less than minus 1.2 feet (Vicksburg gauge) during the summer months (May-October). If

these conditions occur and the plant is generating power, monitoring shall be performed upriver at PT. I (surface/5 feet sub-

surface), Discharge Outlet, Barge Slip Outlet, and down river at PT.7. However, once monitoring has been performed at

river stages less than those cited (0.5 feet during the winter months and minus 1.2 feet during the summer months), the

river stages which existed at the time of thermal modeling, will then become the standard river stage during which a

subsequent monitoring exercise must be performed if the river falls below that stage. Thorough documentation shall be

maintained ?n file of the river stage during each period of thermal monitoring. This policy is subject to modification if any

data collected during a particular stage indicates temperature variations not previously measured. Additionally, thermal

monitoring shall be performed during the winter of 2013/2014 and the summer of 2014. Results shall be included with theapplication for permit re-issuance. Agreement regarding specific conduct of the thermal monitoring shall be determined

prior to implementation.

Biochemical Oxygen Demand - 5 day (BODs)

The average and maximum BOD9 limits of 30 mgfl and 45 mg/I are based on secondary treatment standards andengineering judgment. Secondary treatment standards describe the minimum effluent quality attainable by secondary

treatment for sanitary wastewater [40 CFR 133.102].

Fecal Coliform

Fecal colifo•m limits are water quality based effluent limits (WQBELs) defined in section 111.4 of WPC-2 for streamsclassified as!"Fish and Wildlife". For the months of May through October (summer), fecal coliform shall not exceed an

average conrentration of 200 colonies per 100 ml and a maximum concentration of 400 colonies per 100 ml. For the

months of November through April (winter), fecal coliform shall not exceed an average concentration of 2000 colonies per

100 ml and a maximum concentration of 4000 colonies per 100 ml.

Total Recoverable Zinc

The average and maximum total recoverable zinc limits of 1.0 mg/i are categorical limitations defined in 40 CFR 423.13

(BAT) for cooling tower blowdown.i

2082 PER20070001 17

The total recoverable zinc maximum limit of 0.065 mg/I is a WQBEL determined using the State of Mississippi Water

Quality Criteria (WPC-2). This limit was established because the permittee failed the acute toxicity screen ?erformed

on zinc monitoring data provided in compliance with Part I condition B.! (a) of the current permit.

Total Recoverable Iron

The permittee failed the total iron acute toxicity screen because ofa variability factor, i.e. only one sample wa; provided

on the application. Based on engineering judgment, the applicant will be required to monitor Outfall 01until 12

monthly effluent samples that are representative of all 4 seasons have been analyzed. If this data indicates a 5olation of

water quality standards, the NPDES permit may be modified.

Total Recoverable Arsenic

The permittee failed the total arsenic acute toxicity screen because of a variability factor, i.e only one sample was

provided on the application. Based on engineering judgment, the applicant will be required to monitor Outf4 014 until

12 monthly effluent samples that are representative of all 4 seasons have been analyzed. If this data indicates violation

of water quality standards, the NPDES permit may be modified.

Total Recoverable Copper

Only one analysis was performed and reported on the renewal application for total copper. Using tht reported

concentration, Outfall 014 failed the acute and chronic toxicity screen. Instead of establishing a water quility based

effluent limit (WQBEL) based on I analysis, the applicant will be required to monitor Outfall 014 until 1 monthly

effluent samples that are representative of all 4 seasons have been analyzed. If this data indicates a violatio• of water

quality standards, the NPDES permit may be modified.|

pHH

The minimum and maximum pH effluent limits of 6.0 s.u. and 9.0 s.u. are WQBELs that reflect the WPC-2 requirement

for the normal pH of waters to be 6.0 to 9.0.

2082 PER20070001 18

126 Priority Pollutants Certification

The permittee shall certify, not less than once per year (with the DMR on January 28 'h of each year), that chemical products

added for cooling tower maintenance, including such chemical used for corrosion inhibition, do not result in the dischargevia cooling tower blowdown of any of the 126 priority pollutants (including but not limited to chromium and zinc) in

detectable concentrations. Additionally, once for each product used for cooling system and/or boiler maintenance,compliance shall be demonstrated by submission of certification from the manufacturer that such product contains no

priority pollutants

The additioi of any chemical product to the cooling system and/or the boiler system other than those submitted with the

application is prohibited unless prior written approval is obtained in accordance with condition S-9 on page 7 of this

permit. Chemicals used for the maintenance of cooling water chemistry and boiler water chemistry, or otherwise to operate

or maintain these systems, shall not cause a violation of the terms and conditions contained in condition S-I on page 4 of

this permit.

2082 PER20070001 19

ATTACHMENT A

EPA APPLICABLE CATEGORICAL GUIDELINES

423.12 Best Practicable Control Technology Currently Available (BPT)

(I) The pH of all discharges shall be within the range of 6.0- 9.0.

(2) There shall be no discharge of polychiorinated biphenyl compounds.

(3) The quantity of pollutants discharged fromlow volume-waste sources (Outfalls 006 and 007) shall not e Xceed

the quantity determined by multiplying the flow of low volume waste sources times the concentrationlisted

in the following table:

BPT effluent limitations

Pollutant or Pollutant Property Maximum for any I day Average of daily values for 30(mg/I) consecutive days shall not

exceed (mg/l)

TSS ............................................ 100.0 30.0:Oil and grease.... ...................... 20.0 15.0

(The facility does not generate bottom ash orfly ash. Therefore, 423.12(b)(4) doesnot apply

(The facility does not generate metal cleaning wastes. Therefore, 423. 12(b)(5) does not apply.)

(The facility does not have once-through cooling water. Therefore; 423.12(b)(6) does not apply.)

(4) The quantity of pollutants in cooling tower blowdown (Outfalls 002. 004 and 005) shall not exceed the

quantity determined by multiplying the flow of once through cooling water sources times the concentration

listed in the following table:

BPT effluent limitationsPollutant or pollutant property Maximum 1 Average concentration

concentration (mg/I) (mg/I)

Free available chlorine. ........... .... 0.5 mg/L 0.2 mg/L

2082 PER2007000 i 20

BAT effluent limitations

Average of daily, valuesPollutant or Pollutant. Property Maximum for any I day for 30 consecutive days

,_,(mg/i) Shall not exceed.(mg/i)

The 12 6 priority pollutants contained in

chemicals added for cooling tower No detectable amount No detectable amount.

maintenance, except:Chromium, total ....................... 0...... 0 ,06.2

Zincý total ............... .... 1.0 1.0

(5) Neither free available chlorine nor total residual chlorine may be discharged from any unit for more than two

hours in any one day (120 min) and not more than one unit in any plant may discharge free available or total

residual chlorine at any one time unless the utility can demonstrate to the Regional Administratoror State, ifthe

State has NPDES permit issuing authority, that the units in a particular location cannot operate at or below this

level of chlorination.

(This facility does not have coal pile, therefore 423.1 (b) (9) and (10) do not apply)

(6) At the permitting authority's discretion, the quantity of pollutant allowed to be discharged may be expressed as a

concentration limitation instead:of the mass based limitations ofthis section, Concentration limitations shall be

those; concentrations specified in this section.

(7) In the event that waste streams from various sources art combined for treatment or discharge, the quantity of

each Pollutant or pollutant property controlled shall not exceed the specified limitation for that waste source.

423.13 Best Available Technology Economically Achievable (BAT)

(8) There shall be no discharge of polychlorinated biphenyl compounds.

(The facility does not. have once-through cooling water. Therefore, 423.13(b) and (c) does not apply.).

(9) Totalkresidual chlorine may not be discharged from any single generating unit for more than two hours per day

unles§ the discharger demonstrates to the permitting authority that a discharge for more than two hours is

required for macro invertebrate control. Simultaneous multi-unit chlorination is permitted.

(10) The quantity of pollutants discharged in cooling tower blowdown (Outfall 002, 004 and 005) shall not exceed

the qtantity determined by multiplying the flow of cooling tower blowdown times the concentration listed in'the

following table:

2082 PER20070001 21

BAT effluent limitations

Maximum concentration Average concentration

Pollutant or Pollutant Property (mg/I) (mg/I)

Free available chlorine ................ 0.5 mE 0.2 mg&

(11) Neither free available chlorine nor total residual chlorine may be discharged from any unit for more than two

hours in any one day (120 min) and not more than one unit in any plant may discharge free availab e or total

residual chlorine at any one time unless the utility can demonstrate to the Regional Administrator or S ate, if the

State has NPDES permit issuing authority, that the units in a particular location cannot operate at or I elow this

level of chlorination.

(12) The quantity of pollutant allowed to be discharged may be expressed as concentration limitations instcid of mass

based limitations.

(13) In the event that waste streams from various sources are combined for treatment or discharge, the quant ofeadh pollutant

or pollutant property controlled shall not exceed the specified limitation fbr that waste source.

2082 PER20070001 22

ATTACHMENT B

TOXICITY SCREENING

Grand Gulf Nuclear Station has three external discharge points. Outfall 001 is a combination of internal outfalls

002, 004, 005, 006 and 0 11 that discharges directly into the Mississippi: River. Outfall 013 consists of the

combined discharge from the Bechtel Shop; vehicle maintenance shop; Ice House Condensate; Standby Service.

Water Leakage; Construction and Site Runoff; Once-through cooling Water; site processing facility HVAC;

Internal Outfall 010 (Sanitary); Internal Outfall 016 (Energy SerVice System) which discharges to Hamilton Lake.

Outfall 014 consists of a discharge from sedimentation basin B which includes water from internal Outfall 007;

standby service water leakage and releases; intermittent circulation water basin overflows; and stormwater runoff.Outfalls 004, 005 and 006 are internal outfalls that discharge through Outfall 002 which discharge to Hamilton

Lake.

For Outfails 001

QF i 7Qi.0 of receiving stream (Acute Screening)

82,082 MGD

Mean annual flow (Human Health Screcning)

653,272.60 MGD

= Maximum 30 day value. flow.=1 2.95 MGD

IWC 100 * Q/(Q, + Qw)

=100" (12.05)/(82,082+12.05) •0.01% (7Q10)- 100 * (12.05)/(653272.74-12.05) = 0.002 % (Mean Annual)

Because IWC is less than 1 percent, an acute and human health toxicity screen will be performed.

For Outfalls 013

Q, = Receiving Stream Flow

= 0 MGD (7QI 0-Acute and Chronic Screening)= 5.881 MGD (Mean Annual - Human Health Screening)

Q.. = Maximum 30 day value flow.

= 0.08 MGD (Outfall 013)

IWC (%) = Q. /(Q, + Q.)*i 00

2082 PER20070001 23

= 0.8/(5.881 +0.8)* 100 = 11.97 % (Outfall 013) Mean= 0.8/(0+0.8)*100 = 100 % (Outfall 013) 7Q10=0

Because IWC is greater than I percent, an acute, chronic and human health toxicity screen will be perfo med.

For Outfalls 014

Q, = Receiving Stream Flow

= 0 MGD (7QI 0-Acute and Chronic Screening)

= 0 MGD (Mean Annual - Human Health Screening)

Q. =- Maximum 30 day value flow.= 0.07 MGD (Outfall 014)

= 11.64 MGD (Outfall 002 via Outfall 014)

IWC (%) =Qw/(Qr+Qw)*100= 0.7/(5.881+0.8)* 100 = 11.97 % (Outfall 014) Mean

= 0.7/(0+0.7)*100 = 100 % (Outfall 014) 7QI0=0

Because IWC is greater than I percent, an acute, chronic and human health toxicity screen will be performed.

For Outfall 002 when discharged to Outfall 007 and thence to Outfall 014

During plant outages when the Circulating Water System is drained, there is a portion of the Circulating Water

System that cannot be discharged via Outfall 002. This portion of effluent is manually pumped into the 100-yearstorm ditch and discharged via Outfall 007 (thence to Outfall 014). To predict if there would be a violation towater quality, a toxicity screen for this discharge was performed on those parameters that were reported atconcentration above the minimum quantification levels (MQL's). Because this effluent is normally part ýf Outfall002, a toxicity screen for this discharge was performed for using the data provided on the application fo Outfall002. Since this type of discharge will seldom occur, only an acute toxicity screen is applicable to this dicharge

option.

Qr = Receiving Stream Flow

= 0 MGD (7Q I0-Acute and Chronic Screening)

= 0 MGD (Mean Annual - Human Health Screening)

Qw = Maximum 30 day value flow.

= 11.64 MGD (Outfall 002 via Outfall 014)

IWC (%) =Q, /(Q, + Qw)*100= 11.64/(0+1 1.64)*100 = 100% (Outfall014) Mean

2082 PER20070001 24

=1 .64/(0+11,64)*100= 100% (OutfalO104)r7Q10"0

xr = Receiving stream concentration.

X Historical effluent data. from the application.

X = Permit limits from previous permit or from effluent guidelines.

X,.. The calculated instream concentration based on existing permit limits or the calculated limit based on

current effluent guidelines.X, 'The calculated instream concentration based on historical effluent data from the application

a= (o. * + (o.*X)(Q,.+ Q+)

To calculate Xt substitute X,.for X,..

Until 12 samples can be. analyzed, the effluent is multiplied by 10 as seen in the following equation::

x, Q, * x,) +o*X 10)(Q,.+ Q,)

To ensure that the each pollutant limitation would protect water quality, the pollutant .limitations wereevaluated in the toxicity screen as well. To view screening results, see the toxicity screening. tables on

the following pages.

2082 PER20070001 25

Ouffall 001 Chemical Specific Screening (Using data from the Form 2C Application)

Ir (river, mean annual) =Or (river, 7Q10) =

ow (effluent) =

653272.70 MGD82082.00 MGD

12.05 MGD

IWC: 100,* [Qwl(Qr+Qw)] %IWC (mean) 0.002 !%I IWC 7Q10)= 0.01 %

Water Quality Acute Screen: (Ouffall 001)

Xt = f((r x Xr) + (Ow x (Xw11 / (Or.+ Qw•Conc. in ua/1. unless otherwise stated.

Assuming Xw x t AssumIng Xw x I WQ Criteria

P,,, Xw (less than) Xw Xr Xt. where QrwQ1O Xt, whom QrO 7Q10 Acute

tdonc.;I67EffluM)i Cons. In Eftluf Cons.4tii inxng 0'~ ~ Cqe 1 ~ P sfalZinc, Total .. 356 0 0.052255 . Pass 0.522547 Pass 65J000,

Water Quality Human Health Screen: (Outfall 001)

Xt =[(Or x Xr) + (Qw x (Xwfl I (Or + Ow) Conc. in ug/I, unless otherwise stated.Xt_=__(__xr) __ ( _wx_(Xw)__I_(_r_+ __w) _......_ •Assuming Xw x I AssumInq Xw x 10 WO Criteria

Xw (less than) Xw Xr XA, where Qr mean XA, where Or. mean Human Health

Parameter " coh... Eu onei Ioluene (con. i4 RW) f er ,o•o: R*) ie) (Cn. n.i"ssailArsenic, Total 2 0 0,000037 Pass 0.000369 Pass 0.0780Mercury, Total 0.0063 .0 0000000 Pass 0.000001 .. Pass 0.151 "

Zinc, Total 356, 0 0,006567 Pass 0.065665 Pass 5000,0000BIs(2-ethylhe•xf)pthaiata 0.017 0 0o00000 Pass 0.000003 Pass 2.2

2082 PER20070001 -26

Outfall 013 Chemical SpecificScreening (Using data from the Form 2C Application)

Qr (river,.mean annual) =,Qr (river, 7Q10) =

Qw (effluent) =

6.881484 MGOD0.00 MGD

0.8 MGD

lWC:..lWC (mean) =I wc (7010) =

100 * [Ow/(Qr, Qw)] %11.97 %100a0 1%

I l " l i iI

Water Quality Acute Screen: (Ouffal! 013):

An acute screening. could not be performed because there are no acute water quality standards available for the pollutants subject to the screening.

Water Quality Chronic Screen: (Outfall 013)

Xt = Qr x Xr)+ (Qw x (Xw)/I (Qr + Qw) Conc. in ug/l, unless otherwise stated.Assuming Xw x I Assuming Xw zI Critera

Xw (less then) Xr Xt, where Or z 7Q10. Xt. where Or: 7Q10 AcutePearareter E ......Con. In Effluent) • .Conc• in Eflu) (Conc.cAtiron, Total 270 0 270.000000 Pass 2700.000000 Fall 1000.0

Water Quality Human Health Screen: MOuffalO 013)

Xt [(= r x Xr) + (Qw x I / (Qr + Qw) Conc. in ugn, unless otherwise stated.Assuming Xw x I AssumIng Xwx 10 WO Criteda

I Xw (loss than) Xw X xA where Or = mean Xt, whore Or =.mean H.uman HealthPar-ymter ... .. . In Eum`i ) nc°.I un)`` .I` fie) oo. Alr bd"ng) PassafFai (.or. A•t•r Mixing), PS& ,.-a.:.S L

Arsenic, Total 12 0 i.436807 Pass 14.388066 Pass 24.0000

Mercury, Total _ 0.002 0 .0.002000 Pass 04020000 Pass 0.151

Zinc, Total 356 0 42.625261 Pass 426.252611 Pass 5000.0000Bis(Z4thylhexyllpthalate 0.01v 0 0,002035 Pus 0,020355 Pan 2.2

2082 PER20070001 27

Outfall 013 Chemical Specific Screening (Using August 1, 2004 Monitoring Submittal)

r. (river, mean annual) qQr (river, 7Q10) =

Qw (effluent) =

5.881484 MGD0.00 MGD0.8 MGD

IWC: 100' iQw/(QIf= (mean) =

1*w9] . %11.97 1 WJIWC (7Q10 = 100.00 ] yo

Water Quality Acute Screen: (Outfall 013)

Xt = [(Or x Xr• + (Ow x )]/11 (Or + Ow) Conc. in uall. unless otherwise stated..Assuming Xw x -. AssuminXwx10 WQ Criteria

Xw (less than) Xw Xr Xt, where Or'= 7010 XA, where Qr 7010 .Acute

.,;.. ,,,,,,,ro ,,,,,,,,,o, In Effluene) (Corc. inoncln ek .: In iP.,) (Con,.A MWag) 'Pa&sFai jCoi Mar • •Mxn PasaI -Zinc, Total ,, 0 94.000000 Fall ... 65.0

Zinc, Total 0.066 0 0.065000 Pass - - 65.0

Water Quality Chronic Screen: (Ouffall 013)

Xt = [(Qr x Xr) + (Qw x (Xw)] / (Qr + Qw) Conc. in ughl, unless otherwise stated."_ "Assuming Xw x I Assuming Xw x 10 Wo Criteria

Xw (less than) Xr XA, where OQr 7Q10 XA, where Qr = 7010 Acute•~~~ ~ 1:: & 6, .."• ..:I.i::n=fU t "1 .ýn ) "-cin . (~n.-- .• M 'g' .. = -. •: .• • • -"--3•: _- -i: :I-iZinc, Total 8: 0 8.000000 Pass - - 65.0

Zinc, Total (Limit) 65 0 65.000000 Pass - 65.0

The following total zinc data was provided on the August 1, 2004 monitoring submittal:

Maximum Daily Value 94 ug/IlMaximum 30-day Value 94 ug/Long Term Average 8.ugIl

2082 PER20070001 28

Assuming Xw x I Assuming Xwxl10 WQ Criteria

Xw (less than) Xw Xr XL. where Qr= 7010 Xt, where Or= 7010 Acute

Copper. Total 10 0 10.000000 Fall 100=000000. Fail 7.000

Copper, Total (Limit) 7 0 7.000000 Pass - - 7.000

Water Quality Chronic Screen: (Outfall 014)

Xt =M(Qr x Xr) + (Qw x Xw)./ (Qr + Qw) Conc. in uq/i, unless otherwise stated....... _Assuming Xw x I Assuming Xw x 10 WO Criteria

Xw (less than) Xr Xt, where r = 7010 Xt where Qr = 7Q10 Acute

Copper, Total 10 0 0 10,000000 Fail 10M000000 Fall 5.0

Copper, Total (Limit) 5 0 5.000000 Pass - - 5.0

Iron, Total: 100 0 100.000000 1 Pass 1000,000000 1 Pass 1000.0

Water Quality"Human Health Screen: (Outfall 014)

Xt = Qr x Xr) +.(Qwx (Xw)]/(Qr+Qw) Conc. in ug/i, unless otherwise stated.... Assuming Xw~x.1. Assuming Xw x 10 WQ Criteria

Xw (loss than) Xw Xri XA, where Or = mean xA, where Or = mean . Human Health

,..ssm i I ,c "4 .....Parameter InCoo. Effliqent} tConc. In Effluent. (Coc. InRivet)R (Con After MWng) Pas/Fatj (C Ae ).j Paal .

.Arsenic. Total 15 0 15.000000 Pass 150.000000 Fall 24.0000

Copper, Total 10 0 '10.000000 Pass 1 00.000000 Pass 1000.0000

2082 PER20070001I 29

Ouffall 014 Chemical Specific Screening (Using August 2004 Monitoring Submittal)

Qr (river, mean annual) =Qr (river, 7Q10) =

.Qw (effluent) =

0.00 MGD0.00 MGD0.07 MGD

IWC: 100 * [Qw/(Qr+Qw)]lIwc (mean)= 100.00 I

WC 7010= oo100.00 1


Xt =Qr x Xr) + (Ow x (Xw I / (Qr + Qw) Conc. in ugI, unless otherwise stated.Assuming xw x I Assuming Xw x 10 Wo Criteria

Xw (lass than) xw Xr At where Qr =7010 At where Or = 7010 Acute

Zinc, Total 69 0 69.000000 Fal - I - 65.0

Zinc, Total (Limit) j0065 0 0065000 Pass - - 65.0

Water Quality Chronic Screen: 1Ouffall 014)

Xt = .[Qr x Xr) + (Qw x (Xw i/(Qr + Qw) Conc. in ug/l, unless otherwise stated.__Assuming Xw x I Assumin xw x 10 WO Criteria

Xw (less than). X At, where OrzTQI0 Xt. where Or= -410 Acute

Zinc, Total _$ 0 9.000000 Pass - - 65.0

Zinc, Total (Um.t) 0.065 0 0.065000 Pass .. . . 65.0

Water Quality Human Health Screen: (Ouffall 014)

Xt (Qr x Xr) + (Qwx (X )A / (Qr +Qw) Conc. in u/i£ unless otherwise stated......_Assuming Xw x I Assuming Xw x 10 - WO Criteria

Xw (less than) Xw Xr Xt where Or = mean It, where Qr= mean _ _ Human Health

Paameter..t (Conc. Afte•r iP.l aAr .s,. .a-.W, "i .lZinc, Total 9 0 9.0000D s - - 000.0

The following total zinc data was provided on the August 1, 2004 monitoring submittal'

Maximum Daily Value 69 ug/hMaximum 30-day Value 69 ug/ILong Term Average.. 9 ug . . .........).....

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Outfall 002 When Portions Are Drained to Outfall 007 thence 014

ir (river, mean annual).:Qr (•iver, 7Q10)

Qw (effluent) :

0.00 MGO-040;MGD

11.64 MGD

IWC:IenI IWC (7QI 0)= %li li - 4 I'


Xt [(Qr x Xr)+ ,(Qw x (Xw)] I (Qr + Qw) Conc. in ug/n. unless otherwise stated.Assuming Xw x I Assuming Xw x 10 WO COrfrta

Xw (less than) Xw Xr ,Xt.where Qr= 7010 Xt% where Qr=a 7010. Acute

Zinc, Total 730 0 780.000000 Fall 7800.000000 Fall 66.000

Nickel, Total 4 0 .8.000000 I Passt 80.000000 Pass 280.0

During plant outages when the Circulating Water System is drained, there is a portion of the Circulating Water System that cannont be discharged viaOutfall002. This portion of effluent is manually pumped into the 100-year storm ditch and discharged via Outfall 007 (thence to Outfall 014). To,predict if there would be a violation to water quality, a toxicity screen for this discharge was performed on those parameters that were: reported atconcgntration above the mimimum quantification levels (MQL's). Because this. effluent is normally part of Outfal1 002; a toxicity screen for thisdischarge was performed for using thedata provided on the application for Outfall. 002.

An acute toxicity screen could not be performed on Iron, Magnesium, Arsenic and Mercury because there are no acute water quality criteria available,for these parameters. Because this type of.discharge is not routine, there should not be any chronic or human health impacts. Therefore, a chronic andhuman health, screen will also not be performed for the aforementioned parameters.

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attachment 34 to gnro-2012/00039 - er reference - mdeq ... · 27/4/2011 · selenium, total -0.007...

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