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Projects throughput to 4.0 million ton per year, assumed as the Project baseline in B-44 _ emission calculations. cont. V.13 Fugitive PM 10 Emissions Quarry operations are a major source of fugitive dust. Some applicable mitigation measure were listed in Comment III.C.2. Appendix D to the Draft EIR further identifies numerous "successful" methods to control fugitive dust emissions from quarry operations including: for haul roads, dust suppressant application, — paving, and route modifications; for conveyors, covering and wet suppression; for storage piles, wet suppression,windbreaks, enclosures, and soil stabilizers; for conveyors and batch transfer points, wet suppression and various methods to reduce freefall distance; and for screening and other size clarifications, covering and wet suppression. (Draft EER, Appx. D, p. 2.) Practices in other similar industries B-45 include: for transfer points, dustless transfers, minimizing drop height, low pressure drops, treating material with a chemical suppressant prior to transfer, and dry fogging systems; for haul road, use of dust suppressants, prompt removal of — materials deposited on the roadway, covering of open trucks transporting material likely to become airborne, salting/sanding for snow and ice conditions, paving or otherwise stabilizing the shoulders of haul roads, and use of wind breaks to prevent wind erosion from adjacent areas,-43 and for storage piles, enclosing them in geodesic domes. (See also Comment IV.D.) _ The on-site equipment and material haul roads at the Project site would be unpaved. (Draft EIR, p. 4.6-22.) Paving these roads, for example, would reduce the amount of entrained road dust and wind-blown dust and reduce the amount of water needed to reduce fugitive dust emissions, thus reducing hydrologic impacts. The Draft EIR does not require any of these"successful" methods to reduce PM10 emissions. V.0 Off-road Mobile Equipment Diesel Exhaust Emissions Mitigation B-46 Exhaust emissions from off-road mobile equipment would be significant during for both site preparation and mobile equipment use during the operational phase. 43 C.Cowherd and others,Control of Open Fugitive Dust Sources,EPA Report EPA-450/3-88-008, September 1988,Sec.2.0;U.S.EPA,Fugitive Dust Background Document and Technical Information Document for Best Available Control Measures, Report EPA-450/2-92-004,September 1992,Sec.3.0; C.Cowherd and others,Control of Fugitive and Hazardous Dusts,Noyes Data Corp.1990;H. _ Hesketh and F.L.Cross,Jr.,Fugitive Emissions and Controls, Ann Arbor Science,1983. 34