For 2014 Golden Empire AWMA Conference September 16, 2014 Leland Villalvazo, Supervising AQS San Joaquin Valley APCD

2008 OEHHA started work on revisions –Included updates to the non-cancer health effects, cancer potency factors, and exposure assessment procedures –Approved by SRP –Largely aimed at providing additional protections for children

“Air Toxics Hot Spots Program Guidance Manual for Preparation of Health Risk Assessments” forms the basis by which HRAs are performed in California: –AB2588 –CEQA –Permitting health risk assessments

Minimize health risk from new and modified sources of air pollution Health risk impact from a new and modified source must not be significant Avoid unreasonable restrictions on permitting Public has a right to know about existing air toxics risk in their neighborhoods High risk facilities must reduce risk

Years of Exposure (30 vs. 70 years) Age Groups(Bins) Age Sensitivity Factors (ASF) Breathing Rates Chronic Reference Exposure Levels (8- hour) Fraction of Time at Home

Worker Exposure Duration (25 vs. 40 years) Worker Modeled Concentration Adjustment Dispersion Model Change (EPA’s AERMOD) Spatial Averaging Poly Aromatic Hydrocarbons (PAH), Creosotes & Lead

Age Groups (Bins) Current Method Proposed Method Age Group 0 – 70 years (Resident) 3 rd Trimester – 0 years 0<2 years 0 – 9 years (Children) 2<9 years 2<16 years 40 years (Worker) 16<30 years years

Age Sensitivity Factors Current MethodProposed method Age Group Age Sensitivity Factor Age Group Age Sensitivity Factor 0 – 70 years (Resident) 1 3 rd Trimester – 0 year10 0<2 years10 0 – 9 years (Children) 2<9 years3 2<16 years3 40 years (Worker) 16<30 years years1

MethodGroupMeasure Long-Term Daily Breathing Rate (L/kg-day) By age Bin 3rd Trimester 0<22<92<1616< Current Adult 95 th pctl. NA 393 Adult 80 th pctl.302 Children 581NA Proposed Adult Mean th pctl th pctl Worker / Children Mean th pctl Adult95 th / 80 th pctl.*

Fraction of Time at Home Current MethodProposed method Age Group Fraction of Time at Home Age Group Fraction of Time at Home 0 – 70 years (Resident) 1 3 rd Trimester <2 years 0 – 9 years (Children) 2<9 years <16 years 40 years (Worker) 16<30 years years

Ambient Air Cancer Risk, San Joaquin Valley (The California Almanac of Emissions and Air Quality, CARB, 2009)

Permitting of stationary sources –BACT for toxics (T-BACT) at above 1 in a million –Will not issue permits if facility’s cumulative increase in risk is above 10 in a million California Environmental Quality Act (CEQA): –10 in a million defined as significant Air Toxics “Hot Spots” Act (AB2588): –Public notification of significant risk facilities at 10 in a million –Risk reduction required if over 100 in a million

Incorporate OEHHA’s Risk Assessment Guideline updates designed to provide protection of infants and children Permitting and CEQA –Adjust thresholds as necessary to prevent unreasonable restrictions –No relaxation of current health protections (no increase in actual air toxics exposure, compared to current policies)

Air Toxics “Hot Spots” –Enhance public right-to-know and health protections by retaining current notification and risk-reduction thresholds Incorporate all possible streamlining efforts in incorporating OEHHA updates Develop effective outreach tools and processes to communicate changes to all interested parties