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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