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EROSION CONTROL ELEMENT#4-Install Sediment Controls. <br /> Requirements—Install Sediment Controls <br /> 1. 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 rain 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 Barrier—BMP C231 <br /> U 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 Pond—BMP C241 <br /> ❑ Construction Stormwater Chemical Treatment—BMP C250 <br /> ❑ Construction Stormwater Filtration—BMP C251 <br /> ❑ Other <br /> ❑ Not Applicable—See explanation below <br /> 7 <br />