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4 <br /> Mr.Jolley August 4, 2004 t <br /> Page3 <br /> PA-0400396 <br /> • Construction activity mitigation measures include: <br /> - Require construction equipment used at the site be equipped with catalystslparticulate <br /> traps to reduce particulate'and NOx emissions. These catalysts/traps require the use of <br /> ultra-low sulfur diesel fuel (15 ppm). Currently, California Air Resources Board (ARB) has <br /> verified a limited number of these devices for installation in several diesel engine families <br /> to reduce particulate emissions. At the time bids are made, have the contractors show <br /> that the construction equipment used is equipped with particulate filters and/or catalysts or <br /> prove why it is infeasible. <br /> Use alternative fuel construction equipment. <br /> Replace fossil-fueled equipment with electrically driven equivalents (provided they are not <br /> run via portable generator set). <br /> i - Install wind breaks on windward sides of construction areas. <br /> Curtail construction during periods of high ambient pollutant concentrations. This may <br /> include ceasing construction activity during peak-hour vehicular traffic on adjacent <br /> roadways, and "Spare the Air Days" declared by the District. <br /> Require that all diesel engines be shut off while on the premises (when not in use) to <br /> reduce emissions from idling. <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 Mr. Hector R. Guerra, Senior Air Quality Planner, or myself at 230- <br /> 5800. <br /> Sinerely <br /> Cynthia Echavarria <br /> Air Quality Specialist <br /> Central Region <br /> Enclosures <br /> c: File <br />