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San Joaquin Vafley Air Pollution Control district Page 3 of 7 dfstrict Reference No,20231078 November 22, 2423 A project with a significant health risk would trigger all feasible mitigation measures. The District strongly recommends that development projects that result in a significant health risk not be approved by the land use agency. The District is available to review HRA protocols and analyses. For HRA submittals please provide the following information electronically to the District for review: + HRA (AERMOD) modeling files • HARP2 files • Summary of emissions source locations, emissions rates, and emission factor calculations and methodologies. For assistance, please contact the District's Technical Services Department by: • E-Mailing inquiries to: hramodeler(a-)valleyair.org • Calling (559) 230-5900 Recommended Measure: Development projects resulting in TAG emissions should be located an adequate distance from residential areas and other sensitive receptors to prevent the creation of a significant health risk in accordance to CARB's Air Quality and Land Use Handbook: A Community Health Perspective located at https:Yww2.arb.ca.govlou r-worklprog rams/resou rce-center/strategy- devela mentlland-use-resources. 3) Ve etative Barriers and Urban Greening There are residential units located north and east, and commercial businesses to the west and south of the Project. The District suggests the County consider the feasibility of incorporating vegetative barriers and urban greening as a measure to further reduce air pollution exposure on sensitive receptors (e.g., residential units). While various emission control techniques and programs exist to reduce air quality emissions from mobile and stationary sources, vegetative barriers have been shown to be an additional measure to potentially reduce a population's exposure to air pollution through the interception of airborne particles and the update of gaseous pollutants. Examples of vegetative barriers include, but are not limited to the following: trees, bushes, shrubs, or a mix of these. Generally, a higher and thicker vegetative barrier with full coverage will result in greater reductions in downwind pollutant concentrations. In the same manner, urban greening is also a way to help improve air quality and public health in addition to enhancing the overall beautification of a community with drought tolerant, low-maintenance greenery.