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4: Install Sediment Controls <br /> 02) <br /> This site SWPPP proposes to ,construct <br /> construct a gravel construction entrance (BMP C105).existing A <br /> vegetative buffer (BMP C1 silt (BMP C233) and retention of'the <br /> vegetation(BMP C101)will provide a vegetated strip around the work area and any adjacent <br /> property line. The construction of these features should be completed before the clearing <br /> and grading of the site. Mulch (BMP C121) will also be used on the exposed soil as <br /> necessary to limit erosion. In addition, streets shall be cleaned as needed at the end of <br /> each work day or throughout the day if dirt and debris is tracked onto the paved surfaces. <br /> 5: Stabilize Soils <br /> The "Construction'Sequence" calls for the stabilization of soils that remain unworked for <br /> 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 than <br /> 7 days from May 1 — Sept. 30. Stabilization techniques may include but not limited to <br /> mulching (BMP C121), plastic sheeting (BMP C123) or hydroseeding (BMP C120), notes <br /> have been added to the plan regarding protection for the stock pile area if necessary. A. <br /> stockpile area has been identified on the SWPPP and is setback a minimum of 25-feet from <br /> any down slope property line. In addition, during dry periods soil should be covered or. <br /> 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(BMP <br /> C121) or other means as specified in the construction sequence like surface roughening <br /> (BMP C130). No concentrated runoff or significant amounts of sheet flow will be directed to <br /> new cut or fill slopes during construction (BMP.C206). <br /> 7: Protect.Drain Inlets <br /> Existing CBs adjacent to the project within Seahurst and 57th will be protected with silt socks. <br /> 8: Stabilize Channels and Outlets <br /> The ouffall for the future roof downspouts will be protected with'a level spreader. <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 formed <br /> areas awaiting installation of concrete or asphalt. Unused concrete remaining in the truck <br /> and pump shall be returned to the originating batch plant for recycling. When no formed <br /> areas are available, washwater and leftover product shall be contained in a lined container <br /> and disposed vf,in=a.manner that.does not violate water quality standards. All vehicles <br /> working on and around the site would need to meet the State requirements for emissions. <br /> A drip pan or other appropriate temporary containment device shall be placed at locations <br /> where leaks or spills may occur during the fueling or maintenance of machinery. <br /> Seahurst SP 18-1015 <br /> -May2020 Page 7 <br />