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EROSION CONTROL ELEMENT # 4 - Install Sediment Controls. <br />Requirements — Install Sediment Controls <br />Prior to leaving the construction site or prior to discharge to an infiltration facility, <br />stormwater runoff from disturbed areas shall pass through a sediment pond or other <br />appropriate sediment removal BMP. Runoff from fully stabilized areas may be <br />discharged without a sediment removal BMP, but must meet the flow control <br />performance standard of protecting properties and waterways downstream from <br />development sites from erosion due to increases in the volume, velocity, and peak flow <br />rate of stormwater runoff from the project site. <br />(Full stabilization means concrete or asphalt paving; quarry spalls used as ditch lining; or <br />the use of rolled erosion products, a bonded fiber matrix product, or established <br />vegetative cover in a manner that will fully prevent soil erosion). <br />2. Sediment ponds, vegetated buffer strips, sediment barriers or filters, dikes, and other <br />BMPs intended to trap sediment on site shall be constructed as one of the first steps in <br />grading. These BMPs shall be functional before other land disturbing activities take place. <br />3. Earthen structures such as dams, dikes and diversion, that are part of the erosion <br />control plan, shall be seeded and mulched according to the timing indicated in Element <br />#5 <br />4. BMPs intended to trap sediment on site must be located in a manner to avoid interference <br />with the movement of juvenile salmonids attempting to enter off -channel areas or drainages, <br />often during non -storm events, in response to ram event changes in stream elevation or wetted <br />area. <br />The following Best Management Practices, (BMPs), the ones that the Contractor will implement on <br />site, to meet the erosion control requirements listed above: <br />✓ Straw Bale Barrier — BMP C230 <br />❑ Brush Bamer BMP C231 <br />❑ Gravel Filter Berm—BMP C232 <br />✓ Silt Fence—BMP C233 <br />❑ Vegetated strip BMP C234 <br />❑ Straw wattles —BMP C235 <br />❑ Sediment Trap BMP C240 <br />❑ Temporary Sediment PondBMP C241 <br />❑ Construction Stormwater Chemical Treatment—BMP C250 <br />❑ Construction Stormwater Filtration BMP C251 <br />❑ Other <br />❑ Not Applicable— See explanation below <br />