9600 SHARON DR EXPLORER MIDDLE SCHOOL 2016-05-27

CITY OF EVERETT STORMWATER MANAGEMENT MANUAL 3.3.2 Activity Code A2 -Transfer of Liquid or Solid Materials A2.I Loading and Unloading Areas for Liquid or Solid Material Description of Pollutant Sources: Loading/unloading of liquid and solid materials at industrial and commercial facilities is typically conducted at shipping and receiving, outside storage,fueling areas,etc. Materials transferred can include products,raw materials, intermediate products,waste materials,fuels, scrap metals,etc. Leaks and spills of fuels,oils, powders,organics,heavy metals, salts,acids,alkalis, etc. during transfer are potential causes of stormwater contamination. Spills from hydraulic line breaks are a common problem at loading docks. Pollutant Control Approach: Cover and contain the loading/unloading area where necessary to prevent run-on of stormwater and runoff of contaminated stormwater. Required BMPs At All Loading/Unloading Areas: 1. A significant amount of debris can accumulate at outside,uncovered loading/unloading areas. Sweep these surfaces frequently to remove material that could otherwise be washed off by stormwater. Sweep outside areas that are covered for a period of time by containers, logs,or other material after the areas are cleared. 2. Place drip pans, storm drain covers or other appropriate temporary containment devices at locations where leaks or spills may occur such as hose connections,hose reels,and filler nozzles. Drip pans shall always be used when making and breaking connections. Check loading/unloading equipment such as valves,pumps, flanges,and connections regularly for leaks and repair as needed. 3. Consistent with Uniform Fire Code requirements and to the extent practicable, conduct unloading or loading of solids and liquids in a manufacturing building or under a roof, lean-to, or other appropriate cover. 4. Berm, dike,and/or slope the loading/unloading area to prevent run-on of stormwater and to prevent the runoff or loss of any spilled material from the area. 5. Large loading areas frequently are not curbed along the shoreline. As a result, stormwater passes directly off the paved surface into surface water. Place curbs along the edge, or slope the edge such that the stormwater can flow to an internal stormwater drainage system that leads to an approved treatment BMP. 6. Pave and slope loading/unloading areas to prevent the pooling of water. The use of catch basins and drain lines within the interior of the paved area must be minimized as they will frequently be covered by material, or they should be placed in designated"alleyways"that are not covered by material,containers, or equipment. 7. To minimize the risk of accidental spillage,prepare an"Operations Plan"that describes procedures for loading/unloading. Train the employees, especially fork lift operators, in its execution and post it or otherwise have it readily available to employees and regulatory officials. 8. Report spills of reportable quantities to Ecology Northwest Regional Office(refer to Appendix B for telephone number). Volume IV— Source Control 3-9