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EXECUTIVE SUMMARY <br /> TABLE S-1 (Continued) <br /> SUMMARY OF IMPACTS AND MITIGATION MEASURES <br /> LEVEL OF SIGNIFICANCE <br /> ENVIRONMENTAL IMPACT MITIGATION MEASURES AFTER MITIGATION <br /> Air Quality(continued) B.5d: The project applicant shall investigate and use the <br /> following technologies to reduce particulate emissions from <br /> diesel-fueled engines:exhaust treatment technologies that <br /> use catalytic and non-catalytic oxidation and filtration(e.g., <br /> exhaust gas purifiers,thermal oxidizers,and filters);engine <br /> modifications;and,fuel additives. Manufacturers have <br /> claimed that these technologies can achieve between a 10 <br /> and 95 percent reduction in particulate emissions. Assuming <br /> that these retrofit technologies could be used with all off- <br /> road mobile equipment and a removal efficiency of <br /> 25 percent could be achieved,overall exhaust diesel <br /> particulates could be reduced by an estimated 4 pounds per <br /> day. <br /> B.5e: To the extent feasible,the project applicant shall <br /> purchase and/or phase in new diesel-powered mobile <br /> equipment that incorporates more stringent emissions <br /> standards mandated by the ARB. To demonstrate mandated <br /> engine improvements,post-1997 diesel-powered engines <br /> greater than 175 horsepower have an emission factor of <br /> 0.15 grams/horsepower-hour versus the post-1987 <br /> uncontrolled emission factor of 0.38 grams/horsepower-hour <br /> factor used to estimate project emissions. If post-1997 <br /> models were purchased for all equipment of 175 hp or <br /> greater,overall exhaust diesel particulates could be reduced <br /> by an estimated 8 pounds per day. <br /> Storktnn Scavenger Transfer Station Expansion S.10 ESA/990190 <br />