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San Joaquin Valley Air Pollution Control District Page 3 District Reference No. 20211108 November 2, 2021 To assist land use agencies and project proponents with Prioritization analyses, the District has created a prioritization calculator based on the aforementioned CAPCOA guidelines, which can be found here: http:www.valleyair.orq/busind/pto/emission factors/C rite ria/Toxics/Utilities/PRIORITI ZATION%20RMR%202016.XLS Health Risk Assessment: Prior to performing an HRA, it is strongly recommended that land use agencies/development project proponents contact the District to review the proposed health risk modeling protocol. A development project would be considered to have a potentially significant health risk if the HRA demonstrates that the project-related health impacts would exceed the Districts significance threshold of 20 in a million for carcinogenic risk, or 1.0 for either the Acute or Chronic Hazard Indices. 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) model files • HARP2 files • Summary of emissions source locations, emissions rates, and emission factor calculations and methodology. For assistance, please contact the District's Technical Services Department by: • E-Mailing inquiries to: hramodeleKuD_valleyair.org • Calling (559) 230-5900 • Visiting the Districts modeling guidance website at: http://www.valleyair.org/busind/pto/Tox Resources/AirQualityMonitoring.htm. Recommended Measure: Development projects resulting in toxic air contaminant emissions should be located an adequate distance from residential areas and other sensitive receptors in accordance to CARB's Air Quality and Land Use Handbook: A Community Health Perspective. Recommended Measure: A health risk screening and/or assessment should be performed to assess potential risks to sensitive receptors for all of the following projects: • Projects whose proposed locations are within the established buffer distances identified in CARB's handbook located at