Item 27 - Appeal Application Nos. 2020-03 and 2020-04 - Central Pointe Mixed-Use Development

Home Browse Search

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 -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 OEHHA guidance from 2003. This guidance utilizes a less health protective scenario than what is currently recommended by SCAQMD, the air quality district with jurisdiction over the City, and several other air districts in the state. Furthermore, in accordance with the guidance set forth by OEHHA, we used the 95t" percentile breathing rates for infants.17 Finally, according to SCAQMD guidance, we used a Fraction of Time At Home ("FAH") Value of 1 for the 3rd trimester and infant receptors.18 We used a cancer potency factor of 1.1 (mg/kg-day)-1 and an averaging time of 25,550 days. The results of our calculations are shown below. The Maximum Exposed Individual at an Existing Residential Receptor (MEIR) Duration Concentration Breathing Cancer Risk Cancer Activity (years) (ug/m3) Rate (L/kg- without ASF Risk with day) ASFs* ASFs* Construction 0.25 0.3357 361 4.6E-07 10 4.6E-06 3rd Trimester 3rd Duration 0.25 4.6E-07 Trimester 4.6E-06 Exposure Construction 0.97 0.3357 1090 5.4E-06 10 5.4E-05 Operation 1.03 2.252 1090 3.8E-05 10 3.8E-04 Infant Exposure 2.00 4.3E-05 Infant 4.3E-04 Duration Exposure Operation 14.00 2.252 572 2.7E-04 3 8.2E-04 Child Exposure Child 14.00 2.7E-04 8.2E-04 Duration Exposure Operation 14.00 2.252 261 9.1E-05 1 9.1E-05 Adult Exposure 14.00 9.1E-05 Adult 9,1E-05 Duration Exposure Lifetime Exposure 30.00 4.1E-04 Lifetime 1.3E-03 Duration Exposure * We, along with CARB and SCAQMD, recommend using the more updated and health protective 2015 OEHHA guidance, which includes ASFs. As demonstrated in the table above, the excess cancer risk to adults, children, infants, and during the 3rd trimester of pregnancy at the MEIR located approximately 125 meters away, over the course of Project construction and operation, utilizing age sensitivity factors, are approximately 91, 820, 430, and 4.6 in 1' "Supplemental Guidelines for Preparing Risk Assessments for the Air Toxics 'Hot Spots' Information and Assessment Act," July 2018, available at: http://www.agmd.gov/docs/default-source/planning/risk- assessment/ab2588supplementalguidelines.pdf, p. 16. "Risk Assessment Guidelines Guidance Manual for Preparation of Health Risk Assessments." OEHHA, February 2015, available at: https://oehha.ca.gov/media/downloads/crnr/2015guidancemanual.pdf 18 "Risk Assessment Procedures for Rules 1401, 1401.1, and 212." SCAQMD, August 2017, available at: http://www.agmd.gov/docs/default-sou rce/ru le-book/Proposed- Rules/1401/riskassessmentprocedures 2017 080717.pdf, p. 7. 11