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<br />PGSF WMVD Storm and Combined Sewer - Construction Package 2 Erosion and Sedimentation Control <br />Project No. 180162 31 25 00 - 11 <br /> <br />1. Temporary on-site water treatment system that removes turbidity from site <br />stormwater in compliance with the City and Washington State Department of Ecology <br />requirements. <br />PART 3 EXECUTION <br />3.01 GENERAL REQUIREMENTS <br />A. Temporary and permanent erosion and sedimentation control measures shall prevent <br />erosion and prevent sediment from exiting the site. If, in the opinion of the Engineer, the <br />Contractor's temporary erosion and sedimentation control measures are inadequate, the <br />Contractor shall provide additional maintenance for existing measures or additional <br />devices to control erosion and sedimentation on the site at no additional cost to the <br />Owner. <br />B. All erosion and sedimentation control devices and structures shall be inspected by the <br />CESCL, as defined by State and local regulations, whichever is more stringent. <br />Frequency of all inspections shall be determined by NPDES permit requirements as <br />outlined in the prepared TESC, Stormwater Pollution Prevention Plan (SWPPP) and State <br />and local permit regulations. <br />C. All erosion and sedimentation control measures and devices shall be constructed and <br />maintained as indicated on the Drawings, in the prepared SWPPP, or specified herein <br />until adequate permanent disturbed area stabilization has been provided and accepted <br />by the Engineer. Once adequate permanent stabilization has been provided and <br />accepted by the Engineer, all temporary erosion and sedimentation control structures <br />and devices shall be removed. <br />D. Construction activities must avoid or minimize excavation and creation of bare ground <br />during wet weather. <br />E. The intentional washing of sediment into storm sewers or drainage ways must not occur. <br />Vacuuming or dry sweeping and material pickup must be used to cleanup released <br />sediments. <br />F. Inspect BMPs in accordance with the schedule in the Ecology NPDES permit or as <br />directed by Engineer. <br />G. Complete an inspection report within 24 hours of an inspection. Each inspection report <br />shall be signed and identify corrective actions. Document that corrective actions are <br />performed within 7 days of identification. Keep a copy of all inspection reports at the site <br />or at an easily accessible location. <br />H. Initiate repair or replacement of damaged erosion and sediment control BMPs <br />immediately and work completed by end of next work day. Significant replacement or <br />repair must be completed within 7 days, unless infeasible. <br />I. Within 24 hours, remediate any significant sediment that has left construction site. <br />Investigate cause of the sediment release and implement steps to prevent a recurrence <br />of discharge within same 24 hours. Perform in-stream cleanup of sediment according to <br />applicable regulations.