75C - PH - THE BOWERY - Laserfiche WebLink

Home Browse Search

years). The annualized average concentration for operation was used for the remainder of the 30-year exposure period, which makes up the remainder of the infantile stage of life (0 - 2 years), child stages of life (2 -16 years) and adult stages of life (16 - 30 years). Consistent with OEH HA, SCAQMD, BAAQMD, and SIVAPCD guidance, we used Age Sensitivity Factors (ASFs) to account for the heightened susceptibility of young children to the carcinogenic toxicity of air poll uti on. 20, n, 24 zs According to this guidance, the quantified cancer risk should be multiplied by a factor of ten during the third trimester of pregnancy and during the first two years of life (infant) as well as multiplied by a factor of three during the child stage of life (2 to 16 years). We also included the quantified cancer risk without adjusting for the heightened susceptibility of young children to the carcinogenic toxicity of air pollution in accordance with older OEH HA guidance from 2003. This guidance utilizes a less health protective scenario than what is currently recommended by SCAQMD, the air quality district responsible for the City, and several other air districts in the state. Furthermore, in accordance with guidance set forth by O€HHA, we used the 9V percentile breathing rates for infants." Finally, according to SCAQMD guidance, we used a Fraction of Time At Home (FAH) Value of 1 for the 3rd trimester and infant receptors." We used a cancer potency factor of 11 mg/kg-day]-' and an averaging time of 25,550 days. The results of our calculations are shown below. The Closest Exposed Individual at an Existing Residential Receptor Duration Concentration Breathing Cancer Risk Cancer Activity (years) (ug/m3J Rate(L/kg- without ASF Riskwith ri—A acc.+ 4cc.. Construction 0.25 0.05355 361 7.3E-09 10 7.3E-07 e' "Risk Assessment Guidelines Guidance Manual for Preparation of Health Risk Assessments." QEHHA, February 2015, available ot: hnps://cehha.ca.gm/media/downloadsfcrnr/2Cl5guidancema nual.pdf. "Draft Environmental Impact Report (DEIR) far the Proposed Thal nge (SCH No 2018071058) " SCAQMD, March 2019, available ot-. huo://www.ag md.gov/dots/default�ource/ceoa/comment- letters/2019/march/RVC190115-03 pdfNNrsn=8, p_ 4_ ""California Environmental Quality Act Air Quality Guidelines," BAAQMD, May 2017, available ac http.//www.baagmd.gw/-'/mediaffilesiRlanning-and-research/cega/cega guidelines may2017-pdf.pdf7la=en p. 56; we also "Recommended Methods for Screening and Modeling Local Risks and Hazards." BAAQMD, May 2011, pvalloble at. htto,//www.baaamd gw/-lmedia/Files/Planning%20and%2OResearchlCEOA/BAAQMD%2DModeling%20Auproac h.a�hx p, 65, 86. ""Update to District's Risk Management Policy to Address OEHHA's Revised Risk Assessment Guidance Document."SIVAPCD, May 2015,availableat:https://www.vallevair.orpbusind/pm/staff-report-5-23-15.p ff, p. 8, 20, 24. �""Supplemental Guidelines for Preparing Risk Assessments for the Air Toxics Mot Spots' Information and Assessment Act," June 5, 2015, available at: hHp:t/www.aqmd.gov/dots/defaultsource/plannindrfsk p_ 19. "Risk Assessment Guidelines Guidance Manual for Preparation of Health Risk Assessments." OEHHA, February 2015, uvailable at hur s J ochha ca_ew/media/downloads/crnrl2015guidancema nual.pdi ""Risk Assessment Procedures for Rules 1401, 1401.1. and 212." SCAQMD. Augul ovalkabfeat: ,try /lwww anmd arrvldnrs/dafanh-sn, pre/n,lc-hnnklPrnnnced- Rules/1401/riskassessmentprocedures 2017 080717.odf. p.7. 12 36 75C-180