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Cemex Vemalis Quarry Mining and Reclamation Project Response to Comment J-2 Commenter suggests potential off-site reductions to impacts to air quality, such as entering into a voluntary Air Quality Mitigation Agreement with the District. Comment noted. Response to Comment J-3 Commenter also states that the District encourages the applicant and fleet operators using the facility to take advantage of the District's Heavy-Duty Engine program to reduce emissions. Comment noted. Response to Comment J-4 The commenter states that the District finds the Health Risk Assessment provided in the DEIR to not be sufficient, and provides a list of items needing further review. A new health risk assessment,using the District's HARP model,was prepared in consultation with District staff. This assessment is included in Appendix A of the FEIR.Assumptions are also included in Appendix A. The results of the assessment are incorporated into Chapter 4 of the FEIR(revisions to the draft). . _ Response to Comment J-5 _ Commenter recommends that Diesel Particulate Matter(DPM) be analyzed using a 70 year lifespan for residents and a 40 year lifespan for workers. The HARP assessment incorporated these assumptions. Response to Comment J-6 Commenter recommends use of the latest version of the Hot Spots Analysis and Reporting Program released by the Air Resources Board be used in analyzing the health rishs of DPM emissions. See Response to Comment J-4. Response to Comment J-7 _ Commenter states that, regarding Toxic Air Contaminant risk impacts, emissions from asphalt plan, concrete plant and DPM impacts need to be run concurrently. See revised health risk assessment,which includes the asphalt plant,onsite equipment,off-road trucks, and fugitive dust. Cemex Vernalis Quarry Mining and RmlamaEon Pied 3-38 ESA/203015 Final Emvanmenial Impact Report June 2005