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1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1� <br />1 <br />n <br />I- <br />I <br />Discharge to Baker Tank or similar treatment device. Dewatering water may be <br />pumped to a Baker Tank, or alternate treatment system. Discharges meeting the <br />project turbidity requirements may be discharged directly to existing storm sewer or <br />site discharge locations. All discharges should be recorded in the site log. book and <br />shown on the sampling map. <br />Discharge to surface runoff sediment facilities. Dewatering water may be <br />discharged to already in place sediment removal facilities ONLY if Turbidity levels in <br />the dewatering water are similar to the site runoff water being treated. Dewater water <br />with higher turbidity levels must be pretreated prior to discharging to surface runoff <br />treatment facilities. <br />Table 4 — Dewatering BMPs <br />Infiltration <br />® <br />Transport off -site in a vehicle (vacuum truck for legal disposal) <br />® <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 />2.1.11 Element 11: Maintain BMPs <br />All temporary and permanent Erosion and Sediment Control (ESC) BMPs shall be maintained <br />and repaired as needed to ensure continued performance of their intended function. <br />Maintenance and repair shall be conducted in accordance with each particular BMP <br />specification (attached). Visual monitoring of all BMPs installed at the site will be conducted at <br />least once every calendar week and within 24 hours of any stormwater or non-stormwater <br />discharge from the site. If the site becomes inactive and is temporarily stabilized, the inspection <br />frequency may be reduced to once every calendar month. <br />All temporary ESC BMPs shall be removed within 30 days after final site stabilization is <br />achieved or after the temporary BMPs are no longer needed. Trapped sediment shall be <br />stabilized on -site or removed. Disturbed soil resulting from removal of either BMPs or vegetation <br />shall be permanently stabilized. <br />Storm water controls at the site shall be maintained and repaired using the following BMP: <br />• Materials on hand (BMP C150) <br />2.1.12 Element 12: Manage the Project <br />The project will be managed based on the following principles: <br />• Projects will be phased to the maximum extent practicable and seasonal work limitations <br />will be taken into account. <br />• Inspection and monitoring: <br />o Inspection, maintenance and repair of all BMPs will occur as needed to ensure <br />performance of their intended function. <br />Page 115 <br />