7800 EVERGREEN WAY HYUNDAI O&M Manual 2025-04-28

. Operators may use a manually operated positive control valve for uncovered wash pads, but a pneumatic or electric valve system is preferable. The valve may be on a timer circuit and opened upon completion of a wash cycle.After draining the sump or separator, the timer would then close the valve. • Minimize the use of water and detergents in washing operations when practicable. • Use phosphate-free biodegradable detergents when practicable. ▪ Use the least hazardous cleaning products available. . Consider recycling the washwater. Operators may use soluble/emulsifiable detergents in the wash medium and should use it with care and the appropriate treatment. Carefully consider the selection of soaps and detergents and treat- ment BMPs. Oil/water separators are ineffective in removing emulsified or water soluble detergents. Another treatment appropriate for emulsified and water soluble detergents may be required. Exceptions: • At gas stations(for charity car washes)or commercial parking lots,where it is not possible to discharge the washwater to a sanitary sewer, a temporary plug or a temporary sump pump can be used at the storm drain to collect the washwater for off-site disposal such as to a nearby sanitary sewer. • New and used car dealerships may wash vehicles in the parking stalls as long as employees use a temporary plug system to collect the washwater for disposal as stated above,or an approved treatment system for the washwater is in place. At industrial sites, contact Ecology for NPDES Permit requirements even when not using soaps, detergents, and/or other chemical cleaners in washing trucks. 4. 34 BMPs for Dock Washing Descriptio of Pollutant Sources: Washing docks(or wharves, piers, floats . d boat ramps) can result in the • charge dirt, bird feces, soaps, and detergents that can • oxic to aquatic life, especially after they t. - on contaminants while cleaning.The BMPs.• is section do not address dry docks, graving docks, • arine railway cleaning operations Pollutant Control Approach: U : •ry methods and e• • pment(scraping, sweeping,vacuuming) to remove debris and contaminants prio • cleanin• ith water to prevent these substances from entering surface water. Applicable Operational B - : Surface Pre•aration • a • S•of Cleanin• • Scoop an• ollect debris and bird feces. • S -ep, capture, and dispose of debris from the dock as solid waste. Sweep • acuum docks to minimize the need for chemical cleaners. 2019 Stormwater Management Manual for Western Washington Volume IV- Chapter 2-Page 507