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BMP C150: 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 <br /> unexpected heavy summer rains. Having these materials on-site reduces the time <br /> needed to implement BMPs when inspections indicate that existing BMPs are not <br /> meeting the Construction SWPPP requirements. In addition, contractors can save <br /> money by buying some materials in bulk and storing them at their office or yard. <br /> Conditions of Use <br /> • Construction projects of any size or type can benefit from having materials on <br /> hand. A small commercial development project could have a roll of plastic and <br /> some gravel available for immediate protection of bare soil and temporary berm <br /> construction. A large earthwork project, such as highway construction, might <br /> have several tons of straw, several rolls of plastic, flexible pipe, sandbags, <br /> geotextile fabric and steel "T" posts. <br /> • Materials are stockpiled and readily available before any site clearing, grubbing, <br /> or earthwork begins.A large contractor or developer could keep a stockpile of <br /> materials that are available for use on several projects. <br /> • If storage space at the project site is at a premium, the contractor could maintain <br /> the materials at their office or yard. The office or yard must be less than an hour <br /> from the project site. <br /> Design and Installation Specifications <br /> Depending on project type, size, complexity, and length, materials and quantities will <br /> vary. A good minimum list of items that will cover numerous situations includes: <br /> Material <br /> • Clear Plastic, 6 mil <br /> • Drainpipe, 6 or 8 inch diameter <br /> • Sandbags, filled <br /> • Straw Bales for mulching, <br /> • Quarry Spalls <br /> • Washed Gravel <br /> • Geotextile Fabric <br /> • Catch Basin Inserts <br /> • Steel "T" Posts <br /> • Silt fence material <br /> • Straw Wattles <br /> Maintenance Standards <br /> • All materials with the exception of the quarry spalls, steel "T" posts, and gravel <br /> should be kept covered and out of both sun and rain. <br /> • Re-stock materials used as needed. <br /> Page 138 <br />