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Element 10: Control Dewatering (2.1.10) <br /> Describe where dewatering will occur, including source of the water to be removed. State clearly <br /> if dewatering water is contaminated or has the potential to be contaminated. <br /> Water from foundations, vaults, and trenches with characteristics similar to stormwater runoff <br /> shall be discharged into a controlled conveyance system before discharging to a sediment trap <br /> or sediment pond. Clean dewatering water will not be routed through stormwater sediment <br /> ponds. <br /> Only clean, non-turbid dewatering water (such as well-point groundwater) may be discharged to <br /> systems tributary to, or directly into, surface waters of the State, provided the dewatering flow <br /> does not cause erosion or flooding of receiving waters. <br /> Describe how you will manage dewatering water to prevent the discharge of contaminants to <br /> waters of the State, including dewatering water that has comingled with stormwater (i.e. <br /> treatment system, off-site disposal). <br /> Check treatment of disposal option for dewatering water, if applicable: <br /> Table 4— Dewatering BMPs <br /> Infiltration <br /> Transport off-site in a vehicle (vacuum truck for legal disposal) <br /> Ecology-approved on-site chemical treatment or other suitable treatment technologies <br /> Sanitary or combined sewer discharge with local sewer district approval (last resort) <br /> Use of sedimentation bag with discharge to ditch or swale (small volumes of localized <br /> dewatering) <br /> No BMP's are applicable to the project. <br /> Installation Schedules: [Insert text here] <br /> Inspection and Maintenance plan: [Insert text here] <br /> Responsible Staff: [Insert text here] <br />