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Ms.Lein January 17, 2006 <br /> PA-0500871 (GP) Page 3 <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 /> • The applicant should use diesel equipment fueled by alternative diesel fuel blends or Ultra Low Sulfur Diesel <br /> (ULSD). The California Air Resources Board (CARB) has verified specific alternative diesel fuel blends for <br /> NOx and PM emission reduction. Only fuels that have been certified by CARB should be used. Information <br /> on biodiesel can be found on CARB's website at http://www.arb.ca.gov/fuels/diesel/altdiesel/altdiesel.htm <br /> and the EPA's website at htti)://www.epa.gov/oms/models/biodsi.htm. The applicant should also use CARB <br /> certified alternative fueled engines in construction equipment where practicable. Alternative fueled <br /> equipment may be powered by Compressed Natural Gas (CNG), Liquid Propane Gas (LPG), electric <br /> motors, or other CARB certified off-road technologies. To find engines certified by the CARB, see their <br /> certification website http://www.arb.ca.gov/msprog/offroad/cert/cert.php. For more information on any of the <br /> technologies listed above, please contact Mr. Chris Acree, Senior Air Quality Specialist, at(559)230-5829. <br /> • Construction equipment should have engines that meet the current off-road engine emission standard (as <br /> certified by the CARB), or be re-powered with an engine that meets this standard. Tier I, Tier II and Tier III <br /> engines have significantly less NOx and PM emissions compared to uncontrolled engines. To find engines <br /> certified by the CARB, see http://www.arb.ca.gov/msprog/offroad/cert/cert.php. This site lists engines by <br /> type, then manufacturer. The "Executive Order" shows what Tier the engine is certified as. For more <br /> information on heavy-duty engines, please contact Mr. Thomas Astone, Air Quality Specialist, at (559) 230- <br /> 5800. <br /> District staff is available to meet with you and/or the applicant to further discuss the regulatory requirements that <br /> are associated with this project. If you have any questions or require further information, please call me at(559) <br /> 230-5800, or Mr. Dave Mitchell, Planning Manager, at (559) 230-5800, and provide the reference number at the <br /> top of this letter. <br /> Sincerely, <br /> Jessica Willis <br /> Air Quality Specialist <br /> Central Region <br /> C:file <br />