7500 HARDESON RD 7 ELEVEN 2024-02-29

7.2 Establish Construction Access One stabilized construction entrance (BMP C105) is proposed off Hardeson Road to provide access to the site. If sediment is transported onto the road surface, the road shall be cleaned each day by shoveling or sweeping prior to washing. Sediment removal by washing alone will not be allowed. If sediment is tracked from the site, the City may require stabilization to contain the sediment or the installation of a wheel wash basin (BMP C106). Dump trucks hauling material to and from the site shall be covered by a tarp. 7.3 Control Flow Rates The existing detention system will be used to control flow rates. 7.4 Install Sediment Controls Structural control measures will be used to reduce erosion and retain sediment on the construction site. The control measures are selected to fit specific site and seasonal conditions. The TESC plan includes the following structural measures (see Appendix A-4): Filter fabric fencing (BMP C233) will be required around portions of the perimeter of the site to prevent sediment -laden stormwater from being transported offsite and around stockpile areas. Native vegetation areas will be maintained to further prevent sediment -laden stormwater from entering the roadway or adjacent properties. Interceptor ditches with check dams and riprap outlet protection will be constructed to direct runoff toward the infiltration sediment pond. 7.5 Stabilize Soils Because source control is the most important form of erosion control, construction practices must adhere to stringent cover requirements. More specifically, during the period of May 1 through September 30, the Contractor will not be allowed to leave soils unprotected for more than 7 days, and immediate seeding will be required for areas brought to finish grade with no further work planned for the next 30 days. Areas to be paved may be armored with crushed rock subbase in place of other stabilizing measures. The area of clearing will be limited to the amount that can be stabilized by September 30 of that year. During the period of October 1 through April 30, all disturbed soil areas will be covered or stabilized within 2 days or 24 hours when a major storm event is predicted. Cover measures may include mulching (BMP C121), netting (BMP C122), plastic sheeting (BMP C123), erosion control blankets (BMP C122), or free draining material. The extent of clearing shall be limited to the amount of land that can be covered or stabilized within 24 hours. Soil stockpiles shall be stabilized by plastic covering or surrounded by filter fabric fence. The Contractor has the option of providing all required material for cover measures onsite at all times or preparing a plan of action to submit to the City. A plan of action shall contain the following: Contractor's name, address, phone number, and emergency phone number. Alternate contact with above information. Construction StPollution Prevention Plan 101DOM Everett 7-Eleven Parking Expansion 4 2180309.11