January 31, 2017

• RegulatoryagencieslikeAQMDsetconcentrationlimitsbasedonpotentialhealthriskviaahealthriskassessment(HRA).

• Determininganacceptablehealthriskissubjecttomanyfactors• Emissionconcentrationandrate• Winddirection/speed• Distancetotheclosestsensitivereceptors• Othertoxicchemicalcompoundsemittingfrom

thesamefacility• Othersimilarfacilitiesnearby

• CalEPA’s OfficeofEnvironmentalHealthHazardAssessment(OEHHA)• Calculatedcancerriskbasedonexposureforan

entirelifetime• 0.045nanogram percubicmeter(ng/m3)from

allsourcescombinedfor24hoursperday,7daysaweek,for30yearscouldincreasecancerrisktoa25inamillionprobability

• Exposureovershorterperiodsoftimewouldbeassociatedwithmuchlowercancerrisks.

• OEHHAhasalsodevelopedachronicReferenceExposureLevel(REL)– 200ng/m3

• Health-basedbenchmarksetatalevelatorbelowwhichadverse,noncancer healtheffectsareunlikelytooccurinthegeneralhumanpopulationwhenexposedcontinuouslyoveralifetime.

• LevelsabovetheRELdonotindicatethehealtheffectswilloccur,rather,thechancesofthesehealtheffectsoccurringincreaseatlevelsabovetheREL.

• ForAnaplexandAerocraft,SCAQMDestablished1nanogrampercubicmeter(ng/m3)basedontheirHRA.• Airqualitysamplesarerecordedeverythreedays• Enforcementisbasedontherolling3-sampleaverage

Day Level(ng/m3) RollingAverage OK?Day1 0.01Day4 1.70Day7 0.02 (0.01+1.7+0.02) ÷ 3=0.58 OKDay10 1.10 (1.7+0.02+1.1) ÷ 3=0.94 OKDay13 1.20 (0.02+1.1+1.2) ÷ 3=0.77 OKDay16 1.50 (1.1+1.2+1.5) ÷ 3=1.27 NODay19 0.15 (1.2+1.5+0.15)÷ 3=0.95 OK

• PermittingProcess• Airmonitoring• Inspection• Typical:Once/year• Follow-up:9calls/day

• NoticestoComply• NoticesofViolation• HearingBoard• OrderforAbatement• CeaseOperation

• Aerocraft- operatingunderAQMDstipulatedorderforabatement• OnJanuary19theCitywasnotifiedthatAerocraft

wasinviolationofthatorderandwasforcedtoceaseoperationofchromiumrelatedfacilities

• AnaplexandAQMDagreedtoasimilarstipulatedorderonJanuary9

Focusonenforcingexistingregulationsandinformingenhancementstothoseregulations

ü WorkedwithAQMDtoconductbusinesssweepsofhundredsofbusinesses,potentialemitters,andotherfacilitiesofconcern

ü Coordinating withAQMDonpubliccomplaints

• 28NoticestoComply• 10NoticesofViolation• CarltonForge*• Anaplex• Procast• Aerocraft• GoldenSt.Engineering

*IssuedadditionalNoV’s Jan.24th and26th basedonpubliccomplaintsandfollow-upinspection.

*Once7validsamplesarecollectedAQMDwillconsiderrelocatingmonitorstoadifferentschool