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Mr. Griffin August f 5,2005 PA-0500462(SA) Page 4 Specialist, at (559) 230-5829. Information on blodiesel can also be found at CARB's website- http://www.arb.ca.gov/fuels/diesel/altdiesel/altdiesel.htm and the EPA's website http://www.epa.gov/oms/models/biodsl.htm. • Light Duty Cars and Trucks should be alternative fueled or hybrids. • Construction activity mitigation measures include: - Install sandbags or other erosion control measures to prevent silt runoff to public roadways from sites with a slope greater than one percent - Install wheel washers for all exiting trucks, or wash off all trucks and equipment leaving the site - Install wind breaks at windward side(s) of construction areas - Suspend excavation and grading activity when winds exceed 20 mph - 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) - Apply idling time limits or 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. • The applicant should use California Air Resources Board (CARE) 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 California Air Resources Board, see their certification website http://www.arb.ca.gov/msprog/offroad/Cert/Gert.r)hl). For more information on alternative fuel engines, please call Mr. Chris Acree, 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 California Air Resources Board), or be repowered with an engine that meets this standard. Tier I and Tier 11 engines have significantly less NOx and PM emissions compared to uncontrolled engines. To find engines certified by the California Air Resources Board, see hffp://.www.arb.ca.gov/msp,rog/off road/cert/cert.ohp. 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. 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) 230-5800 or Mr. Hector R. Guerra, Senior Air Quality Planner, at (559) 230-5820 and provide the reference number at the top of this letter. Sincerely, a �•, Chrystal Meier Air Quality Specialist Central Region Enclosure c:file