825 N BROADWAY 2017-01-13 - Laserfiche WebLink

4. Construction Stormwater Pollution Prevention Plan A Construction Stormwater Pollution Prevention Plan (C-SWPPP) is required for this project because the total disturbed area during construction is greater than the 1-acre threshold. NPDES is not required because both project sites discharge to the combined sewer, however the C-SWPPP is independently required by the City of Everett. This report includes a summary of the C-SWPPP (this section) and a copy of the Stormwater Pollution Prevention Plan (see Appendix D). Stormwater Pollution Prevention (SWPP) measures will be provided in accordance with Washington State Department of Ecology (DOE) and City of Everett standards for both the Big J lot and the Index site. Both project sites will have construction fencing set around the perimeter of the site to mark disturbance limits. Temporary construction entrances will be field located to provide access to the sites. Straw wattles or silt fences will be installed on the downhill side of the project sites to prevent sediment leaving the construction area. Catch basin and inlet protection will be installed in all nearby catch basins and inlets. Interceptor ditches with check dams will be placed on the perimeter of the sites if needed to convey construction stormwater to a sump. The sump will be placed at the low point of excavation and discharge runoff to a settling tank on the Index site or a sediment pond on the Big J lot. KPFF Consulting Engineers 4