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Spill Prevention and Control WM-4 <br />• Store and dispose of used clean up materials, contaminated materials, and recovered spill <br />material that is no longer suitable for the intended purpose in conformance with the <br />provisions in applicable BMPs. <br />• Do not allow water used for cleaning and decontamination to enter storm drains or <br />watercourses. Collect and dispose of contaminated water in accordance with WM-10, Liquid <br />Waste Management. <br />• Contain water overflow or minor water spillage and do not allow it to discharge into <br />drainage facilities or watercourses. <br />• Place proper storage, cleanup, and spill reporting instructions for hazardous materials <br />stored or used on the project site in an open, conspicuous, and accessible location. <br />• Keep waste storage areas clean, well organized, and equipped with ample cleanup supplies <br />as appropriate for the materials being stored. Perimeter controls, containment structures, <br />covers, and liners should be repaired or replaced as needed to maintain proper function. <br />Cleanup <br />• Clean up leaks and spills immediately. <br />• Use a rag for small spills on paved surfaces, a damp mop for general cleanup, and absorbent <br />material for larger spills. If the spilled material is hazardous, then the used cleanup <br />materials are also hazardous and must be sent to either a certified laundry (rags) or disposed <br />of as hazardous waste. <br />• Never hose down or bury dry material spills. Clean up as much of the material as possible <br />and dispose of properly. See the waste management BMPs in this section for specific <br />information. <br />Minor Spills <br />• Minor spills typically involve small quantities of oil, gasoline, paint, etc. which can be <br />controlled by the first responder at the discovery of the spill. <br />• Use absorbent materials on small spills rather than hosing down or burying the spill. <br />• Absorbent materials should be promptly removed and disposed of properly. <br />• Follow the practice below for a minor spill: <br />Contain the spread of the spill. <br />Recover spilled materials. <br />Clean the contaminated area and properly dispose of contaminated materials. <br />Semi-Signifi.cant Spills <br />• Semi-significant spills still can be controlled by the first responder along with the aid of <br />other personnel such as laborers and the foreman, etc. This response may require the <br />cessation of all other activities. <br />January 2011 California Stormwater BMP Handbook <br />Construction <br />www.casqa.org <br />3 of 6