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Panera Bread Stormwater Management Report Everett,WA <br /> 4. Apply windbreaks in the soil such as trees, board fences,tarpaulin curtains, bales of hay, etc. <br /> 5. Cover dust-generating piles with wind-impervious fabric, or equivalent material. <br /> Additional information on dust control can be found in Volume II of the City of Everett <br /> Storm water Management Manual. <br /> A7.12: Maintenance of Stormwater Drainage and Treatment Facilities <br /> Description of Pollutant Sources: Facilities include conveyance systems, detention facilities <br /> such as ponds and vaults, oil and water separators, biofilters, settling basins, infiltration <br /> systems, and all other types of stormwater treatment systems presented in Volume III. Catch <br /> basins can remove from 5 to 15 percent of the pollutants present in stormwater. When catch <br /> basins are about 60 percent full of sediment,they cease removing sediments. Oil and grease, <br /> hydrocarbons, debris, heavy metals, sediments, and contaminated water are found in catch <br /> basins, oil and water separators, settling basins, etc. <br /> Pollutant Control Approach: Provide maintenance and cleaning of debris, sediments, and oil <br /> from stormwater collection, conveyance, and treatment systems to obtain proper operation. <br /> Required BMPs <br /> Maintain stormwater treatment facilities according to the O&M procedures presented in <br /> Appendix F, in addition to the following BMPs: <br /> 1. Inspect and clean treatment BMPs, conveyance systems, and catch basins as needed, and <br /> determine whether improvements in O&M are needed. <br /> 2. Promptly repair any deterioration threatening the structural integrity of the facilities.These <br /> include replacement of clean-out gates, catch basin lids, and rock in emergency spillways. <br /> 3. Ensure that storm sewer capacities are not exceeded and that heavy sediment discharges to <br /> the sanitary sewer system are prevented. <br /> 4. Regularly remove debris and sludge from BMPs used for peak-rate control,treatment, etc. <br /> and truck to a local or state government approved disposal site. <br /> 5. Clean catch basins in accordance with the information provided in Appendix F. Additional <br /> information is also included in Chapter 4 of this volume, BMP S.9 Cleaning Catch Basins. <br /> 6. Clean woody debris in a catch basin as frequently as needed to ensure proper operation of <br /> the catch basin. <br /> 7. Post warning signs; "Dump No Waste- Drains to Groundwater," "Streams," "Lakes," or <br /> emboss on or adjacent to all storm drain inlets where practical. <br /> Core States Group Page 42 <br />