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San Joaquin County QX-99-2 November 16, 1999 Page 2 Additionally, the following list highlights some effective measures to reduce PM-10 emissions generated by this facility that will help comply with Regulation VIII. The areas disturbed by clearing, earth moving, or excavation activities should be minimized at all times. All inactive portions of the site must be promptly seeded and watered until vegetation has sufficiently grown to cover bare earth. • All materials transported throughout the site (trucks hauling earth, gravel or other materials to and from the project site) shalt be either sufficiently watered or securely covered to prevent excessive amounts of dust. ♦ All topsoil stored on site must be adequately covered with tarps or soil stabilizers or adequately moistened to minimize the generation of fugitive dust. • When heavy equipment leaves the construction site, all excessive dirt accumulations on the equipment should be cleaned. • On-site vehicle speed should be limited to 15 miles per hour. Vehicle speed control can reduce fugitive dust emissions from unpaved roads and areas at construction sites by up to 60% assuming compliance with the 15 mph speed limit. To reduce ozone precursor and diesel toxic emissions, the District strongly recommends the project applicant implement the following measures that are designed to reduce this project's impact to the ambient air quality. Ensure all internal combustion engine driven equipment is properly tuned to the manufacturer's specifications. Limit on-site idle time of heavy equipment to 10 minutes. Encourage employees to rideshare or carpool to job site to reduce the amount of vehicle traffic to and from the project area. • When available, natural gas powered or electric equipment shall be utilized in lieu of gasoline and diesel powered engines. Additionally any modifications to existing equipment may be subject to the permitting requirements of the District. Any equipment subject to the District's Permit to Operate (PTO) requirements must obtain an Authority to Construct (ATC) from the District. Construction of equipment that requires an ATC, such as foundations and utility hookups for the equipment, cannot begin until an ATC is obtained_ This process oan