10725 19TH AVE SE 2023-04-07 - Laserfiche WebLink

MR#2: Construction Stormwater Pollution Prevention Plan IV. Construction Stormwater Pollution Prevention Plan: 1: Mark Clearing Limits The first step in the"Construction Sequence" is for a surveyor to stake the limits of clearing and to have construction or silt fencing placed along the limits prior to any other construction activity. 2: Establish Construction Access The SWPPP calls for the proposed construction entrance to be installed as the second step after the staking of clearing limits. A detail is provided on the plans. 3: Control Flow Rates Flows during construction will be controlled by applying the appropriate BMPs. The project will retain as much existing vegetation as possible. In addition,the site proposes to install the future detention facility which could be used as a temporary sediment control during construction to manage storm runoff rates. The Detention facility will be cleaned before put in service. 4: Install Sediment Controls This site and SWPPP proposes to construct a construction entrance and retain existing vegetation and install CB inlet protection to collect and contain the sediment on this site.These features are intended to minimize the opportunity for sediment to leave the site via stormwater or on vehicles. The construction of these features is one of the first items required in the"Construction Sequence".Mulch will also be used on the exposed soil as necessary to limit erosion. 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. Stabilization techniques may include but not limited to mulching, plastic sheeting or hydroseeding, notes have been added to the plan regarding protection for the stock pile area if necessary. 6: Protect Slopes All slopes on site during construction are required to be protected with mulch or other means as specified in the construction sequence. 7: Protect Drain Inlets CB inlet protection will be installed on all new catch basins and yard drains on and adjacent to this project. 8: Stabilize Channels and Outlets There are no channels and outlets on this project site to protect and stabilize. 9: Control Pollutants No outside chemicals are expected to be necessary for the construction of this project.All vehicles working on and around the site would need to meet the State requirements for emissions. 10: Control DeWatering DeWatering is not expected for this project. However, the detention system will be available for holding any dewatering runoff and meter release to the downstream system.