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KITTITAS COUNTY SOLID WASTE ON-CALL <br />CLE ELUM TRANSFER STATION FRONT ENTRANCE DESIGN <br />PW\JA\KITTCO02\ENTRANCE TEMPORARY EROSION AND <br />JUNE 2023 SEDIMENT CONTROL <br />©COPYRIGHT 2023 JACOBS 01 57 13 - 13 <br />M. Within 24 hours, remediate any significant sediment that has left construction <br />site. Investigate cause of the sediment release and implement steps to prevent <br />a recurrence of discharge within same 24 hours. Perform in-stream cleanup of <br />sediment according to applicable regulations. <br />N. At end of each work day, stabilize or cover soil stockpiles or implement other <br />BMPs to prevent discharges to surface waters or conveyance systems leading <br />to surface waters. <br />O. Temporarily stabilize soils at end of shift before holidays and weekends, if <br />needed. Ensure soils are stable during rain events at all times of year. <br />P. Initiate stabilization by no later than end of next work day after construction <br />work in an area has stopped permanently or temporarily. <br />Q. Within 14 days of initiating stabilization or as specified in permit, either seed <br />or plant stabilized area (see Section 31 32 00, Soil Stabilization); or apply <br />non-vegetative measures and cover all areas of exposed soil. Seed dry areas as <br />soon as Site conditions allow. Ensure that vegetation covers at least 70 percent <br />of stabilized area. In areas where Contractor’s activities have compromised <br />erosion control functions of existing grasses, overseed existing grass. Non- <br />vegetative measures may include blown straw and a tackifier, loose straw, or <br />an adequate covering of compost mulch. Complete initial stabilization within <br />7 days if storm water discharges to surface waters impaired for sediment or <br />nutrients, or high quality waters. <br />R. Provide permanent erosion control measures on all exposed areas. Do not <br />remove temporary sediment control practices until permanent vegetation or <br />other cover of exposed areas is established. However, do remove all <br />temporary erosion control measures as exposed areas become stabilized, <br />unless doing so conflicts with local requirements. Properly dispose of <br />construction materials and waste, including sediment retained by temporary <br />BMPs. <br />3.04 EMERGENCY MATERIALS <br />A. Provide, stockpile, and protect the following emergency erosion and sediment <br />control materials on the Project Site for unknown weather or erosion <br />conditions. Emergency materials are in addition to other erosion control <br />materials required to implement and maintain the SWPPP Plan. Replenish <br />emergency materials as they are used. Remove all unused emergency <br />materials from the Project Site at completion of the Project.