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Cemex Vemahs Qua"Mining and Reclamation Projed • the attached Excel spreadsheets calculated wind erosion emissions assuming that these emission factors are actually in units ofgrams per square meter and the stockpile has an area of 2500 square meters or 50 meters squared; • there is no discussion, besides the use ofwatering,for how the 75 percent fugitive dust control will be achieved. Assumptions are included in Appendix D of the DEIR,and assumptions for the revised air quality analysis are provided in FOR Appendix A. Meteorology is based on data from the Fresno Airport (see Response to Comment B-58). See also Response to Comment B-33 regarding 75%dust control. Per the BAAQMD CEQA Handbook and WRAP Fugitive Dust Handbook (Sept 2006), control efficiency of water on stockpiles may be higher than 75%. Response to Comment B-35 Commenter states that they were unable to reproduce the emission factor for handling and _ storage activities (Appx. D,p. 9), and that there is no support provided for the mean wind speed (7.4 mph)and material moisture content(0.7%)used to make the calculations. Commenter also states that there should be more than one emission factor should be used to accommodate the differences between various materials and that the DEIR should assume that the materials will be handled many times, not only once. Commenter restates their request for support for the basis of the assumed 75 percent control offugitive dust. Revised operational assumptions are included in FEIR Appendix A. Wind data is from the Fresno Airport(see Response to Comment B-58). See also Response to Comment B-33. Response to Comment B-36 _ Commenter states that quarry processing emissions were incorrectly calculated in the DEIR, and that the fundamental approach used to calculate quarry emissions is flawed Commenter also states that the reasonably foreseeable maximum production rate should have been calculated from the resource size, equipment capacity, and reasonable worst-case operating scenario. See Response to Comment B-29. Response to Comment B-37 _ Commenter states that either the Draft EIR has erred and assumed only one pit feeder rather than four, or the design processing rate of 8,000 ton/hour assumed in other calculations is in error, and that pit feeder emissions should be increased by a factor offour. Revised equipment assumptions for the revised air quality analysis are provided in FEIR Appendix A. The revised assumptions do not add significant new information not already discussed in the Draft EIR as defined in CEQA Guidelines Section 15088.5. Cemex Vernalis Quarry Mining and Reciam n Project 3-14 ESA 1203015 Final Environmental Impact Report June 2008