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Broadway Everett Expansion Storm Drainage Report <br /> November 16, 2022 <br /> 8. Stabilize Channels and Outlets <br /> NIA— No channels to protect. <br /> 9. Control Pollutants <br /> Silt Fence, a sediment trap, and straw wattles will be used to capture laden runoff. In addition, the <br /> equipment used will be in good working order. <br /> 10. Control Dewatering <br /> Construction is relatively shallow, and groundwater is not anticipated during construction. All trench <br /> and building excavation will be self-contained to prevent runoff. If groundwater is encountered, <br /> sump pumps will pump to either the sediment trap or sediment tanks prior to discharge. <br /> 11. Maintain BMPs <br /> All temporary and permanent erosion and sediment control BMPs shall be maintained and repaired <br /> as needed to assure continued performance of their intended function. Maintenance and repair <br /> shall be conducted in accordance with each particular BMPs specifications. <br /> Visual monitoring of the BMPs will be conducted at least once every calendar week and within 24 <br /> hours of any stormwater or non-stormwater discharge from the site. If the site becomes inactive, <br /> and is temporarily stabilized, the inspection frequency will be reduced to once every month. <br /> All temporary erosion and sediment control BMPs shall be removed within 30 days after the final <br /> site stabilization is achieved or after the temporary BMPs are no longer needed. Trapped sediment <br /> shall be removed or stabilized on site. Disturbed soil resulting from removal of BMPs or vegetation <br /> shall be permanently stabilized. <br /> 12. Manage the Project <br /> Erosion and sediment control BMPs for this project have been designed based on the following <br /> principles: <br /> - Design the project to fit the existing topography, soils, and drainage patterns. <br /> - Emphasize erosion control rather than sediment control. <br /> - Minimize the extent and duration of the area exposed. <br /> - Keep runoff velocities low. <br /> - Retain sediment on site. <br /> - Thoroughly monitor site and maintain all ESC measures. <br /> - Schedule major earthwork during the dry season. <br /> The project will be managed according to the following key project components: <br /> Page 11 <br />