2927 ROCKEFELLER AVE 2019-08-08 - Laserfiche WebLink

3: Control Flow Rates This project is below the thresholds requiring flow control for the project. 4: Install Sediment Controls This site SWPPP proposes to construct/maintain a gravel entrance (BMP C105). The construction of these features should be completed before the clearing and grading of the site. Mulch (BMP C121) will also be used on the exposed soil as necessary to limit erosion. In addition, streets shall be cleaned as needed at the end of each workday or throughout the day if dirt and debris is tracked onto the paved surfaced. 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 existing catch basins adjacent to this project and immediately downstream will be protected with inlet project. All new catch basins will also be protected with inlet protection. 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. 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 %" of rain in a 24-hour period. Also, BMPs shall be inspected on a weekly basis even if site work is not occurring. Rockefeller Building Demolition 18-0115 January 2018