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Element 10: Control Dewatering (2.1.10) <br />There will be a significant excavation in the till ranging to 14 feet on the west side of the <br />site. The till is dense and might hold perched groundwater. Any dewatering volume <br />would need to be filtered by Bakers tanks or the like. <br />Table 4 — Dewatering BMPs <br />Infiltration <br />x <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 />dewaterin <br />List and describe BMPs: N/A <br />Installation Schedules: N/A <br />Inspection and Maintenance plan: N/A <br />Responsible Staff: N/A <br />