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San Joaquin Valley Air Pollution Control District Page 2 of 8 District Reference No: 20230359 May 11 , 2023 IF1 ) construct Ion Em0SSMS The District recommends , to reduce impacts from construction - related diesel exhaust emissions , the Project should utilize the cleanest available off- road construction equipment , including the latest tier equipment . I h) Recommended Wode for 0u n 'rKV' Mg „ ire zrrmssaons Project- related criteria pollutant emissions from construction and operational sources should be identified and quantified . Emissions analysis should be performed using the California Emission Estimator Model ( CalEEMod ) , which uses the most recent CARR - approved version of relevant emissions models and emission factors . CalEEMod is available to the public and can be downloaded from the CalEEMod website at : www , caleemod . com . 2 ) Health Risk Screening /Assessment The County should evaluate the risk associated with the Project for sensitive receptors ( residences , businesses , hospitals , day - care facilities , health care facilities , etc . ) in the area and mitigate any potentially significant risk to help limit exposure of sensitive receptors to emissions . To determine potential health impacts on surrounding receptors ( residences , businesses , hospitals , day - care facilities , health care facilities , etc . ) a Prioritization and /or a Health Risk Assessment ( HRA) should be performed for the Project . These health risk determinations should quantify and characterize potential Toxic Air Contaminants ( TACs ) 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 . Health risk analyses should include all potential air emissions from the project , which include emissions from construction of the project , including multi - year construction , as well as ongoing operational activities of the project . Note , two common sources of TACs can be attributed to diesel exhaust emitted from heavy - duty off- road earth moving equipment during construction , and from ongoing operation of heavy - duty on - road trucks . Prioritization ( Screening Health Risk Assessment) : A " Prioritization " is the recommended method for a conservative screening - level health risk assessment . The Prioritization should be performed using the California Air Pollution Control Officers Association ' s ( CAPCOA) methodology .