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CITY OF EVERETT STORMWATER MANAGEMENT MANUAL <br /> 2. Upgrade the road surface strength by improving particle size, shape, and mineral types that make <br /> up the surface and base materials. <br /> 3. Add surface gravel to reduce the source of dust emission. Limit the amount of fine particles <br /> (those smaller than .075 mm) to 10 to 20 percent. <br /> 4. Use geotextile fabrics to increase tihe strength of new roads or roads undergoing reconstruction. <br /> 5. Encourage the use of alternate, paved routes, if available. <br /> 6. Restrict use by tracked vehicles and heavy trucks to prevent damage to road surface and base. <br /> 7. Apply chemical dust suppressants using the admix method, blending the product with the top few <br /> inches of�surface material. Suppressants may also be applied as surface treatments. <br /> 8. Pave unpaved permanent roads and other trafficked areas. <br /> 9. Use vacuum street sweepers. <br /> , 10. Remove mud and other dirt promptly so it does not dry and then turn into dust. <br /> 11. Limit dust-causing work on windy days. <br /> Contact the Puget Sound Air Pollution Control Agency(PSAPC.A) for guidance and training on other <br /> dust control measures. Compliance with PSACP constitutes compliance with this BMP. <br /> Maintenance Standards <br /> Re-spray area as necessary to keep dust to a minimum. <br /> 3.2.17 BMP C150: Materials on Hand <br /> Purpose <br /> Quantities of erosion prevention and sediment control materials shall be kept on the project site at all <br /> times to be used for emergency situations such as unexpected heavy summer rains. Having these <br /> materials on site reduces the time needed to implement BMPs when inspections indicate that existing <br /> BMPs are not meeting the GSWPPP requirements. <br /> Conditions of Use <br /> 1. Materials shall be stockpiled and readily available before any site clearing, grubbing, or <br /> earthwork begins. <br /> � 2. If storage space at the project site is at a premium, the contractor shall maintain the materials at <br /> ' their office or yard. The office or yard must be less than an hour from the project site. <br /> . Design and/nstallation Specifications <br /> � Depending on the project type, size, complexity, and length, materials and quantities will vary. A good <br /> minimum that will cover numerous situations includes the materials in the table at the end of this section. <br /> Maintenance Standards <br /> 1. All materials with the exception of the quarry spalls, steel T-posts, and gravel should be kept <br /> covered and out of both sun and rain. <br /> 2. Materials shall be restocked as needed. <br /> Volume ll— Construction Stormwater Pollution Prevention <br /> 3-29 <br />