10306 27TH DR SE 2021-12-15 - Laserfiche WebLink

5: Stabilize Soils The "Construction Sequence" calls for the stabilization of soils that remain unworked for certain lengths of time based on the time of year. Bare/disturbed soils shall remain uncovered or un-stabilized for no more than 2 days from Oct. 1 — April 30 and no more than 7 days from May 1 — Sept. 30. Stabilization techniques may include but not limited to mulching (BMP C121), plastic sheeting (BMP C123) or hydroseeding (BMP C120), notes have been added to the plan regarding protection for the stock pile area if necessary. A stockpile area has been identified on the SWPPP and is setback a minimum of 25-feet from any down slope property line. In addition, during dry periods soil should be covered or wetted (BMP C140) to reduce the production of dust. 6: Protect Slopes' All disturbed slopes on site during construction are required to be protected with mulch (BMP C121) or other means as specified in the construction sequence like surface roughening (BMP C130). No concentrated runoff or significant amounts of sheet flow will be directed to new cut or fill slopes during construction (BMP C206). 7: Protect Drain Inlets The catch basin within the driveway will be protected with a sock filter or similar device, if needed. 8: Stabilize Channels and Outlets No new channels or outlets are proposed for this site. 9: Control Pollutants No outside chemicals are expected to be necessary for the construction of this project. Concrete truck chutes, pumps, internals and hand tools shall be washed out only into formed areas awaiting installation of concrete or asphalt. Unused concrete remaining in the truck and pump shall be returned to the originating batch plant for recycling. When no formed areas are available, washwater and leftover product shall be contained in a lined container and disposed of in a manner that does not violate water quality standards. All vehicles working on and around the site would need to meet the State requirements for emissions. A drip pan or other appropriate temporary containment device shall be placed at locations where leaks or spills may occur during the fueling or maintenance of machinery. 10: Control DeWatering DeWatering is not expected for this project. 11: Maintain BMPs The construction supervisor will be responsible for maintaining all BMPs during construction and working with the City to relocate or add BMPs as necessary as site conditions change. BMPs should be inspected and maintained as needed after every rain event producing more than W of rain in a 24-hour period. Also, BMPs shall be inspected on a weekly basis even if site work is not occurring. 12: Manage the Project It will be the responsibility of the Contractor and Developer to manage this project and coordinate with the City Inspector and Engineer. 27'" Dr SE - Haack 19-0508 May 2019 Page 7