1996-02-06_REVISION - M1977493 (14)

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• 0 Chapter 4-Site-Specific Industrial Storm Water BMP$ Vehicle Position" What Is It Vehicle positioning is the practice of locating trucks or rail cars while transferring materials to prevent spills of materials onto the ground surface, which may then contaminate storm water runoff. Vehicle positioning is a simple and effective method of material spill prevention and yet it is commonly overlooked. I When and Where to Use It Vehicle positioning can be used at all types of industrial facilities. This practice is appropriate for any area where materials are transferred from or to vehicles, such as loading and unloading areas, storage areas, and material transfer areas. Use vehicle positioning in conjunction with other practices such as covering, sumps, drip pans, or loading and unloading by air pressure or vacuum where chemical spills are of concern. What to Consider The purpose of vehicle positioning is to locate vehicles in a stable and appropriate position to prevent problems, such as spills resulting from broken material storage containers, spills caused by vehicle movement during materials transfer activities, and spills caused by improperly located • vehicles. Vehicles should also be positioned near containment or flow diversion systems to collect unexpected spills from leaks in transfer lines or connections. The following activities are included in this practice: • Constructing walls that help in positioning the vehicles • Positioning vehicle either over a drain or on a sloped surface that drains to a containment structure • Outlining required vehicle positions on the pavement • Using wheel guards or wheel blocks • Posting signs requiring the use of emergency brakes • Requiring vehicles to shut off engines during materials transfer activities. Advantages of Vehicle Positioning • Is inexpensive • Is easy and effective Disadvantages of Vehicle Positioning • May require redesign of loading and unloading areas 4-25