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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-1o, 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 -Significant 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 3 of 6 <br />Construction <br />www.casqa.org <br />