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<br />Prepared by: Bolton & Menk, Inc. MCM 6: MUNICIPAL OPERATIONS BEST MANAGEMENT PRACTICES <br />Orono SWPPP ǀ 0C1.126140 Page 4 <br />Equipment and building washing can generate dry weather runoff contaminated with <br />detergents, oils, grease, and heavy metals. Equipment and building washing BMPs can <br />eliminate contaminated wash water discharges to the storm sewer system. <br />1. Proper equipment maintenance includes: <br />a) Maintain equipment regularly: Check for leaks or stains, and fix leaks immediately. <br />b) Capture leaks and rips during maintenance activities with a drip pan. <br />c) If equipment is stored outside, provide a tarp or roof to protect the equipment <br />from precipitation. <br />2. Proper infrastructure cleaning includes: <br />a) Perform the activity during dry periods. <br />b) Use non-toxic chemicals for maintenance and minimize or eliminate the use of <br />solvents. <br />3. Proper Building Repair, Remodeling, and Construction includes: <br />a) Do not dump any toxic substance or liquid waste on the pavement, the ground, <br />or toward a storm drain. <br />b) Use ground or drop cloths underneath outdoor painting, scraping, and <br />sandblasting work and properly dispose of collected material daily. <br />4. Proper dumpster cleaning includes: <br />a) Do not wash out dumpsters outdoors or in a parking lot. <br />b) Dumpsters should be washed in a wash bay or over a floor drain that goes to the <br />sanitary sewer or return dumpsters to the waste disposal contractor for cleaning <br />at the contractor’s facility. <br />c) Route leaks and other wastewaters from dumpsters to the sanitary sewer system. <br />d) Keeping spill clean-up materials easy to access. <br /> Use, Storage and Disposal of Significant Materials <br />The storage, use and disposal of hazardous materials and chemicals require consideration of <br />a number of environmental health and safety factors. These include inventory control, as well <br />as the proper use and disposal of containers and equipment. <br />1. Proper BMPs for chemicals and hazardous materials: <br />a) Keep lids on all containers and store under cover. <br />b) Properly close all containers when not in use. <br />c) Use secondary containment for hazardous materials and protect from rain. Store <br />hazardous materials in an area where spills will not reach storm drains. <br />d) Label all hazardous materials according to hazardous waste regulations. <br />e) All hazardous materials should be properly labeled and remain labeled. The <br />purchase date should be placed on the label. <br />f) In general, storage areas should not be hot or humid. <br />2. Proper BMPs for flammable materials: <br />a) Flammable materials should be stored in ventilated storage cabinets or approved