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1 1 1 1 1 1 1 F 1 1 1 1 1 1 1 1 1 PENSKE TRUCK LEASING EVERETT ONSITE IMPROVEMENTS CONSTRUCTION STORMWATER POLLUTION PREVENTION PLAN Sitts & Hill Engineers, Inc. Job Number 17,710 . Washout facilities shall be maintained to provide adequate holding capacity with a minimum freeboard of 12 inches. . Washout facilities must be cleaned, or new facilities must be constructed and ready for use once the washout is 75% full. . If the washout is nearing capacity, vacuum and dispose of the waste material in an approved manner. . Do not discharge liquid or slurry to waterways, storm drains or directly onto ground. . Do not use sanitary sewer without local approval. . Place a secure, non -collapsing, non -water collecting cover over the concrete washout facility prior to predicted wet weather to prevent accumulation and overflow of precipitation. . Remove and dispose of hardened concrete and return the structure to a func- tional condition. Concrete may be reused on -site or hauled away for disposal or recycling. . When you remove materials from the self -installed concrete washout, build a new structure; or, if the previous structure is still intact, inspect for signs of weakening or damage, and make any necessary repairs. Re -line the structure with new plastic after each cleaning. Removal of Temporary Concrete Washout Facilities . When temporary concrete washout facilities are no longer required for the work, the hardened concrete, slurries and liquids shall be removed and properly dis- posed of. . Materials used to construct temporary concrete washout facilities shall be removed from the site of the work and disposed of or recycled. . Holes, depressions or other ground disturbance caused by the removal of the tem- porary concrete washout facilities shall be backfilled, repaired, and stabilized to prevent erosion. 2014 Stormwater Management Manual for Westem Washington Volume ll - Chapter 4 - Page 321 SITTS & HILL ENGINEERS, INC. 56 TACOMA, WASHINGTON