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Ms. Hatef March 6,2006 <br /> PA-0600068(SA) Page 3 <br /> • Enhanced construction activity mitigation measures include: <br /> - Limit area subject to excavation, grading, and other construction activity at any one time <br /> - Limit the hours of operation of heavy duty equipment and/or the amount of equipment in use <br /> - Replace fossil-fueled equipment with electrically driven equivalents (provided they are not run via <br /> a portable generator set) <br /> - Require that all diesel engines be shut off when not in use on the premises to reduce emissions <br /> from idling. The applicant should install equipment that provides amenities that would otherwise <br /> be powered by idling engines. An example of such technology includes IdleAire. For more <br /> information see htto://www.idleaire.com/. <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, <br /> and "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 /> 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 me at (559) 230-5818 or Mr. Dave Mitchell, Planning Manager, at (559) 230-5807 <br /> and provide the reference number at the top of this letter. <br /> Sincerely, <br /> 9essica R.Willis <br /> Air Quality Specialist <br /> Central Region <br /> c:file <br />