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• <br /> 2.1.10 Element 10: Control Dewatering <br />• Dewatering is not expected as part of this construction project. If dewatering occurs, <br /> groundwater to be discharged through a filtering sock into the on-site interceptor trenches. <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 />• <br /> List and describe BMPs: <br /> Installation Schedules: <br />• Inspection and Maintenance plan: <br /> Responsible Staff: <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 /> i <br /> specification (see Volume ll of the SWMMWW or Chapter 7 of the SWMMEW). <br /> Visual monitoring of all BMPs installed at the site will be conducted at least once every calendar <br /> week and within 24 hours of any stormwater or non-stormwater discharge from the site. If the <br /> site becomes inactive and is temporarily stabilized, the inspection frequency may be reduced to <br />• 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. <br />• Trapped sediment shall be stabilized on-site or removed. Disturbed soil resulting from removal <br /> of either BMPs or vegetation shall be permanently stabilized. <br /> Additionally, protection must be provided for all BMPs installed for the permanent control of <br /> stormwater from sediment and compaction. BMPs that are to remain in place following <br /> completion of construction shall be examined and restored to full operating condition. If <br />• sediment enters these BMPs during construction, the sediment shall be removed and the facility <br /> shall be returned to conditions specified in the construction documents. <br />• Page 114 <br />