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2.0 CONSTRUCTION STORMWATER BEST MANAGEMENT <br /> PRACTICES (BMPS) <br /> • BMPs are consistent with the most current approved edition of the Stormwater <br /> Management Manual for Western Washington(SWMMWW)at sites west of the crest <br /> of the Cascade Mountains. <br /> • BMPs include armored construction entrance, silt fence, and storm drain inlet <br /> protection. <br /> • Location of each BMP is noted on the site map(Figure 1). <br /> 2.1 ELEMENT 1: PRESERVE VEGETATION / MARK CLEARING LIMITS <br /> No significant vegetation is present on the site. Therefore,no BMPs are applicable. <br /> 2.2 ELEMENT 2: ESTABLISH CONSTRUCTION ACCESS <br /> An armored construction access will be installed at the vehicle access point.In the event <br /> that track out cannot be effectively prevented with use of existing BMPs,a wheel wash <br /> meeting the standards of BMP C106: Wheel Wash,will be installed.The existing chain <br /> link fence will remain in place to restrict vehicle access to the designed locations. <br /> List and Describe BMPs: <br /> BMP C105: Stabilized Construction Entrance/Exit,and BMP C106: Wheel Wash if <br /> necessary. <br /> Installation Schedules: Prior to start of work <br /> Inspection and Maintenance Plan: The stabilized construction access will be inspected <br /> daily to verify compliance with BMP C105; specifically,that all quarry spalls are in <br /> place,and sediment has not accumulated within the pad. If installed,the Wheel Wash <br /> will be maintained as recommended by the manufacturer,and inspected daily to ensure <br /> that it is compliance with BMP C106:Wheel Wash.Water from the wheel wash will be <br /> removed from the site and transported to an approved disposal facility. <br /> Responsible Staff: The contractor will be responsible for the installation,inspection,and <br /> maintenance of construction access. <br /> 2.3 ELEMENT 3: CONTROL FLOW RATES <br /> Due to the flat topography and high infiltration capacity there is not expected to be <br /> surface water flow off the site.Any surface water that does not infiltrate and has the <br /> potential to migrate off the property will be pumped and stored in temporary storage <br /> tanks for either off-site disposal or approved and permitted treatment and discharge to <br /> sewer system if allowed.A silt fence that will be installed around the perimeter of the site <br /> will serve as a backup to slow and disperse any incidental surface water flow. <br /> EVERETT STEEL SWPPP <br /> AUGUST 2019 1'gG <br />