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Ms.Lein �' November 17,2005 <br /> PA-0500708(SA) Page 3 <br /> • Construction activity mitigation measures include: <br /> - Install sandbags or other erosion control measures to prevent silt runoff to public roadways from <br /> sites with a slope greater than one percent <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 a <br /> 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. <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, and <br /> "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 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. Hector R. Guerra, Senior Air Quality Planner, at (559) 230-5820 and provide the reference <br /> number at the top of this letter. <br /> Sincerely, ///� <br /> - w [� ✓vl�C-t�`J <br /> Jessica R. Willis/ <br /> Air Quality Specialist <br /> Central Region <br /> c: file <br />