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Ms. Hate/ Page 3 <br /> PA-0600514(SA) <br /> - Curtail construction during periods of high ambient pollutant concentrations; this may include <br /> ceasing of construction activity during the peak-hour of vehicular traffic on adjacent roadways, and <br /> "Spare the Air Days"declared by the District. <br /> - Implement activity management (e.g. rescheduling activities to reduce short-term impacts) <br /> - During the smog season (May through October), lengthen the construction period to minimize the <br /> number of vehicles and equipment operating at the same time. <br /> - Off road trucks should be equipped with on-road engines when possible. <br /> - Minimize obstruction of traffic on adjacent roadways. <br /> Construction equipment may be powered by diesel engines fueled by Ultra Low Sulfur Diesel (ULSD) or <br /> alternative diesel fuel blends. The California Air Resources Board (GARB) has certified specific <br /> alternative diesel fuel blends for NOx and/or PM emission reductions. Information on alternative diesel <br /> fuel blends can be found on CARB's website at www.arb.ca.gov/fuels/diesel/altdiesel/altdiesel.htm. <br /> Alternative-fueled equipment may use Compressed Natural Gas (CNG), Liquid Propane Gas (LPG), <br /> electricity, or other designated alternative fuels to achieve greater emission reductions than current <br /> diesel equipment. For more information on any of the fuels or technologies above, please contact Mr. <br /> Chris Acree, Senior Air Quality Specialist, at(559) 230-5829. <br /> Construction equipment may be used that meets the current off-road engine emission standards. <br /> Equipment with uncontrolled engines may be repowered with an emissionized engine that meets current <br /> standards. Tier I, Tier ll, and Tier III engines have significantly less NOx and PM emissions compared <br /> to uncontrolled engines. To find engines certified by GARB, see www.arb.ca.gov/msproq/offroad/cert/ <br /> cert.oho. Construction equipment may also be retrofit with exhaust after-treatment devices that reduce <br /> NOx, ROG, and/or PM. A list of retrofit devices can be found on CARB's Diesel Emission Control <br /> Srategies webpage, see www.arb.ca.gov/diesel/verdev/verifiedtechnologies/vt.htm. For more <br /> information on heavy-duty engines, please contact Mr. Thomas Astone, Air Quality Specialist, at (559) <br /> 230-5800. <br /> District staff is available to meet with you and/or the applicant to further discuss the regulatory <br /> requirements that are associated with this project. If you have any questions or require further <br /> information, please call Jessica at (559) 230-5818 and provide the reference number at the top of this <br /> letter. <br /> Sincerely, <br /> David Warner <br /> Director of Permits Services <br /> rnaud Marjollet <br /> Permit Services Manager <br /> DW:jw <br />