20 - Laserfiche WebLink

Screening Health Risk Assessment for 3370 Hopyard Road Project Screening Health Risk Assessment Overview Health risk impacts are evaluated based on exposure to toxic air contaminant(TAC)emissions. In addition,the BAAQMD recommends evaluating fine particulate matter(PM2.5)emissions since it is often associated with fossil fuel exhaust TAC emissions.A TAC is defined by California Health and Safety Code Section 39655. As per the definition, all federal hazardous air pollutants(HAPS)are considered as TACs: "Toxic air contaminant"means an air pollutant which may cause or contribute to an increase in mortality or in serious illness, or which may pose a present or potential hazard to human health. A substance that is listed as a hazardous air pollutant pursuant to subsection (b) of Section 112 of the federal act(42 U.S.C. Sec. 7412(b)) is a toxic air contaminant. The BAAQMD provides screening analysis tools to evaluate potential health risk impacts from exposure to TACs. The Stationary Source Screening Analysis Tool(BAAQMD 2012b)is a Google Earth-based inventory of stationary source risks and hazards. This source provides addresses and locations of permitted TAC sources in the BAAQMD jurisdiction. According to the BAAQMD, sources within 1,000 feet of the Project Site boundary should be included in a health risk assessment. Based on a survey of stationary sources using the Stationary Source Screening Analysis Tool,there are no stationary sources located within 1,000 feet of the Project Site (based on the listed address for each stationary source). The Roadway Screening Analysis Calculator(BAAQMD 2015)is a spreadsheet-based risk calculator for mobile source emissions from vehicles traveling on roadway.According to the BAAQMD, roadways within 1,000 feet of the Project Site and with average daily trips(ADT)of 10,000 vehicles or more should be assessed in a health risk assessment. The Project Site is adjacent to and within 1,000 feet of Hopyard Road. Furthermore,as discussed previously,the City identified Hopyard Road as having greater than 10,000 ADT;therefore,the Roadway Screening Analysis Calculator was used to evaluate health risks from this roadway. Significance Thresholds Appendix G of the State CEQA Guidelines provides an environmental checklist to determine if a project would result in a significant impact to the environment. The checklist item that most directly relates to air quality health risk impacts is listed as checklist item d. under section III., air quality and is as follows: III. Air Quality d. Expose sensitive receptors to substantial pollutant concentrations. The State CEQA Guidelines(Section 15064.7)provide that,when available,the significance criteria established by the applicable air quality management district or air pollution control district may be relied upon to make determinations of significance. The potential air quality impacts of the project are,therefore,evaluated according to the significance criteria in the BAAQMD CEQA Air Quality Guidelines. According to these guidelines,the Project would result in a significant air quality impact if it would: • Expose sensitive receptors to TAC emissions from combined off-site sources of TAC emissions within 1,000 feet that would result in an incremental increase in cancer risk that exceeds 100 in one million, and/or a combined Hazard Index of 10, and/or combined PM2.5 concentration of 0.8 µg/m3. CWIN\53247\1016910.1/vountvilje Hill Winery Project 3 ESA/MSRG001AQ