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Ms.Allen November 16 2005 PA-0500729 Page 3 fuel engines. New alternative fuel heavy-duty trucks also qualify. For more information regarding this program contact the District at (559) 230-5858 or visit our website at http-//www.valleyair.org/transportation/heavydutyidx.htm. • The applicant/tenant(s) should require that all diesel engines be shut off when not in use on the premises to reduce emissions from idling. The applicant should install equipment that provides amenities that would otherwise he powered by idling engines. An example of such technology includes ldleAire. See http://www.idleaire.6om/. • The applicant should use GARB certified alternative fueled engines in construction equipment where practicable. Alternative fueled equipment may be powered by Compressed Natural Gas (CNG), Propane (LPG), electric motors, or other CARB certified off-road technologies. To find engines certified by the CARB, see their certification website http://www.ar_b.ca.gov/msProg/offroad/cert/cert.php. For more information on alternative fuel engines, please tail Mr. Chris Acree, Senior Air Quality Specialist, at (559) 230-5829. • Construction equipment should have engines that,meet the current off-road engine emission standard (as certified by the CARB), or'be re-powered with an engine that meets this standard. Tier I and Tier II engines have significantly less.NOx and PM emissions compared to uncontrolled engines. To find engines certified by the CARB, see http://www.arb.ca.gov/msprogloffroad/cer-Vicert.i)hp. This site lists engines by type, then manufacturer. The "Executive Order" shows what Tier the engine is certified as. For more information on heavy-duty engines, please contact Mr. Kevin McCaffrey, Air Quality Specialist, at (559) 230-5831. • Enhanced construction activity mitigation measures include: Instal! sandbags or other erosion control measures to prevent silt runoff to public roadways from sites with a slope greater than one percent Limit area subject to excavation, grading, and other construction activity at any one time - Limit the hours of operation of heavy duty equipment and/or the amount of equipment in use Replace fossil-fueled equipment with electrically driven equivalents (provided they are not run via a portable generator set) Require that all diesel engines be shut off when not in use on the premises to reduce emissions from idling. - Curtail construction during periods of high ambient pollutant concentrations; this may include ceasing of construction activity during the peak-hour of vehicular traffic on adjacent roadways, and "Spare the Air Days"declared by the District. - Implement activity management (e.g. rescheduling activities to reduce short-term impacts) - During the smog season (May through October), lengthen the construction period to minimize the number of vehicles and equipment operating at the same time. - Off road trucks should be equipped with on-road engines when possible. - Minimize obstruction of traffic on adjacent roadways. District staff is available to meet with you and/or the applicant to further discuss the regulatory requirements that are associated with this project. If you have any questions or require further information, please call me at (559) 230-5820, or Mr. Hector Guerra, Senior Air Quality Planner, at (559) 230-5820, and provide the reference number at the top of this letter. Sincerely, 9es ,- k�,ca R.Willis Air Quality Specialist Central Region i i C: file