1710 W MARINE VIEW DR 2024-01-03

the concrete should be broken up, removed, and disposed of per applicable solid waste reg- ulations. Dispose of hardened concrete on a regular basis. . During periods of concrete work, inspect the concrete washout areas daily to verify continued performance. • Check overall condition and performance. • Check remaining capacity (% full). • If using self -installed concrete washout areas, verify plastic liners are intact and side - walls are not damaged. • If using prefabricated containers, check for leaks. Maintain the concrete washout areas to provide adequate holding capacity with a minimum freeboard of 12 inches. • Concrete washout areas must be cleaned, or new concrete washout areas must be con- structed and ready for use once the concrete washout area is 75% full. . If the concrete washout area is nearing capacity, vacuum and dispose of the waste material in an approved manner. . Do not discharge liquid or slung to waterways, storm drains or directly onto ground. . Do not discharge to the sanitary sewer without local approval. . Place a secure, non -collapsing, non -water collecting cover over the concrete washout area prior to predicted wet weather to prevent accumulation and overflow of pre- cipitation. . Remove and dispose of hardened concrete and return the structure to a functional con- dition. Concrete may be reused on -site or hauled away for disposal or recycling. . When you remove materials from a self -installed concrete washout area, build a new struc- ture; 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 Concrete Washout Areas . When concrete washout areas are no longer required for the work, the hardened concrete, slurries and liquids shall be removed and properly disposed of. . Materials used to construct concrete washout areas 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 concrete washout areas shall be backfilled, repaired, and stabilized to prevent erosion. 2019 Stormwater Management Manual for Western Washington Volume // - Chapter 3 - Page 323