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1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />PENSKE TRUCK LEASING EVERETT ONSITE IMPROVEMENTS <br />CONSTRUCTION STORMWATER POLLUTION PREVENTION PLAN <br />Sitts & Hill Engineers, Inc. <br />Job Number 17,710 <br />• Lower speed limits. High vehicle speed increases the amount of dust stirred up <br />from unpaved roads and lots. <br />• Upgrade the road surface strength by improving particle size, shape, and mineral <br />types that make up the surface and base materials. <br />• Add surface gravel to reduce the source of dust emission. Limit the amount of fine <br />particles (those smaller than .075 mm) to 10 to 20 percent <br />• Use geotextile fabrics to increase the strength of new roads or roads undergoing <br />reconstruction. <br />. Encourage the use of alternate, paved routes, if available. <br />. Restrict use of paved roadways by tracked vehicles and heavy trucks to prevent <br />damage to road surface and base. <br />. Apply chemical dust suppressants using the admix method, blending the product <br />with the top few inches of surface material. Suppressants may also be applied as <br />surface treatments. <br />. Pave unpaved permanent roads and other trafficked areas. <br />. Use vacuum street sweepers. <br />. Remove mud and other dirt promptly so it does not dry and then turn into dust <br />• Limit dust -causing work on windy days. <br />• Contact your local Air Pollution Control Authority for guidance and training on other <br />dust control measures. Compliance with the local Air Pollution Control Authority <br />constitutes compliance with this BMP. <br />r <br />Maintenance Standards <br />Respray area as necessary to keep dust to a minimum. <br />BMP C1SO: Materials on Hand <br />Purpose <br />Keep quantities of erosion prevention and sediment control materials on the project site <br />at all times to be used for regular maintenance and emergency situations such as unex- <br />pected heavy summer rains. Having these materials on -site reduces the time needed to <br />implement BMPs when inspections indicate that existing BMPs are not meeting the Con- <br />struction SWPPP requirements. In addition, contractors can save money by buying some <br />materials in bulk and storing them at their office or yard. <br />2014 Stormwater Management Manual for Westem Washington <br />Volume II - Chapter 4 - Page 311 <br />SITTS & HILL ENGINEERS, INC. 46 <br />TACOMA, WASHINGTON <br />