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Verizon Communications-Stormwater Site Plan Everett,WA <br /> IV. Analysis and Design of Required Erosion and Sediment Control BMPs <br /> All erosion and sediment control measures shall be governed by the requirements of the <br /> Everett Stormwater Management Manual. A detailed temporary erosion and sedimentation <br /> control plan will be prepared to assist the contractor in complying with these requirements <br /> during building permit application. The proposed TESC plan will utilize interceptor swales, <br /> silt fence, inlet protection and sediment ponds, as necessary. <br /> A. Construction Sequence and Procedure <br /> The proposed development will include an erosion/sedimentation control plan designed to <br /> prevent sediment-laden run-off from leaving the site during construction. The erosion <br /> potential of the site is influenced by four major factors: soil characteristics, vegetative <br /> cover, topography, and climate. Erosion/sedimentation control is achieved by a <br /> combination of structural measures, cover measures, and construction practices that are <br /> tailored to fit the specific site. <br /> Prior to the start of any grading activity upon the site, all erosion control measures, <br /> including installation of a stabilized construction entrance, shall be installed in accordance <br /> with this plan and the construction documents. <br /> The best construction practices will be employed to properly clear and grade the site and <br /> to schedule construction activities. The planned construction sequence for the <br /> construction of the site will be provided during the construction document approval <br /> process. <br /> B. Soil Stabilization and Sediment Trapping <br /> Structural control measures will be used to reduce erosion and retain sediment on the <br /> construction site. The control measures will be selected to fit the specific site and seasonal <br /> conditions. For instance, the soils on the site will significantly affect the erosion potential. <br /> On-site soils are Alderwood-Urban land complex, described as having slight erosion <br /> potential. The majority of the site area is generally flat. In consideration of the area <br /> topography and site soils, erosion control and sediment trapping measures will need to be <br /> closely monitored during construction. <br /> The following structural items will likely be used to control erosion and sedimentation <br /> during construction: <br /> • Stabilized construction entrance <br /> • Filter fabric fences <br /> • Cover measures <br /> • Haul Road and Staging areas <br /> • Temporary Interceptor Swales/Rock Check Dams <br /> • Sediment Ponds <br /> PACLAND Job#50183001 Page 10 <br />