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4: Install Sediment Controls <br />This site SWPPP proposes to construct/maintain a gravel entrance (BMP C105), <br />vegetative buffer (BMP C102), silt fencing (BMP C233) and retention of the existing <br />vegetation (BMP C101) that will provide a vegetated strip around the work area and <br />any adjacent property line. The construction of these features should be completed <br />before the clearing and grading of the site. Mulch (BMP C121) will also be used on the <br />exposed soil as necessary to limit erosion. In addition, streets shall be cleaned as <br />needed at the end of each workday or throughout the day if dirt and debris is tracked <br />onto the paved surfaced. <br />5: Stabilize Soils <br />The "Construction Sequence" calls for the stabilization of soils that remain unworked <br />for certain lengths of time based on the time of year. Bare/disturbed soils shall remain <br />uncovered or un-stabilized for no more than 2 days from Oct. 1 — April 30 and no more <br />than 7 days from May 1 — Sept. 30. Stabilization techniques may include but not <br />limited to mulching (BMP C121), plastic sheeting (BMP C123) or hydroseeding (BMP <br />C120), notes have been added to the plan regarding protection for the stock pile area <br />if necessary. A stockpile area has been identified on the SWPPP and is setback a <br />minimum of 25-feet from any down slope property line. In addition, during dry periods <br />soil should be covered or wetted (BMP C140) to reduce the production of dust. <br />6: Protect Slopes <br />All disturbed slopes on site during construction are required to be protected with mulch <br />(BMP C121) or other means as specified in the construction sequence like surface <br />roughening (BMP C130). No concentrated runoff or significant amounts of sheet flow <br />will be directed to new cut or fill slopes during construction (BMP C206). <br />7: Protect Drain Inlets <br />All existing downstream and proposed catch basins will have silt socks/inlet filters <br />installed to protect the conveyance system. <br />8: Stabilize Channels and Outlets <br />No new channels proposed at this time. <br />9: Control Pollutants <br />No outside chemicals are expected to be necessary for the construction of this project. <br />Concrete truck chutes, pumps, internals, and hand tools shall be washed out only into <br />formed areas awaiting installation of concrete or asphalt. Unused concrete remaining <br />in the truck and pump shall be returned to the originating batch plant for recycling. <br />When no formed areas are available, washwater and leftover product shall be <br />contained in a lined container and disposed of in a manner that does not violate water <br />quality standards. All vehicles working on and around the site would need to meet the <br />State requirements for emissions. <br />Perez SP <br />March 2022 <br />Revised: June/August 2022 Page 8 <br />