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San Joaquin Valley Air Pollution Control District Page 2 District Reference No.20210504 June 14,2020 The District offers the following comments: 1) Proiect Related Criteria Pollutant Emissions 1a) Construction Emissions: Although the construction-related emissions are expected to have a less than significant impact,the District suggests that the City advise project proponents with construction-related exhaust emissions and activities resulting in less than significant impact on air quality to utilize the cleanest reasonably available off-road construction fleets and practices (i.e. eliminating unnecessary idling) to further reduce impacts from construction-related exhaust emissions and activities. 1b) Health Risk Screening/Assessment Located approximately 0.1 miles east of the project there is one sensitive receptor (i.e.single family residential units).Also located approximately 0.1 north and east of the project there are two sensitive receptors(i.e. single family residential units and commercial buildings). A Health Risk Screening/Assessment identifies potential Toxic Air Contaminants (TACs) impact on surrounding sensitive receptors such as hospitals, daycare centers,schools,work-sites,and residences.TACs are air pollutants identified by the Office of Environmental Health Hazard Assessment/California Air Resources Board (OEHHA/CARB)that pose a present or potential hazard to human health. A common source of TACs can be attributed to diesel exhaust emitted from both mobile and stationary sources. List of TACs identified by OEHHA/CARB can be found at: https://ww2.arb.ca.gov/resources/documents/carb-identified-toxic-air- conta m ina nts The District recommends the development project(s) be evaluated for potential health impacts to surrounding receptors (on-site and off-site) resulting from operational and multi-year construction TAC emissions. i) The District recommends conducting a screening analysis that includes all sources of emissions. A screening analysis is used to identify projects which may have a significant health impact. A prioritization, using the latest approved California Air Pollution Control Officer's Association (CAPCOA) methodology, is the recommended screening method. A prioritization score of 10 or greater is considered to be significant and a refined Health Risk Assessment(HRA)should be performed. For your convenience,the District's prioritization calculator can be found at: PA-2100031, 32, 61, 62 (ZR, SU) Response Letters 38