Laserfiche WebLink
4. PPP NARRATIVE <br /> The intent of this section is to provide the information necessary to support the <br /> engineering plans in order to implement a design that will; reduce, eliminate or prevent <br /> the discharge of stormwater pollutants, meet or exceed the water quality and sediment <br /> management standards for the City and State, and prevent adverse impacts to the <br /> receiving waters for this project. Note, this narrative is intended to support the SWPPP <br /> that is included with the Targeted Drainage Plans also a part of this submittal package <br /> to the County. <br /> A. SITE GRADING/EROSION CONTROL RISK ASSESSMENT <br /> Area proposed to be cleared/worked: 0.02 acres <br /> Average slope for the site: 3% (Area of Disturbance Only) <br /> Erosion Hazard of Soil Low <br /> Critical Areas downslope No <br /> Site is upstream of an ESA Stream No <br /> Based on the above information and the fact that the area of the site to be disturbed is <br /> flat and construction site runoff will pass through silt fencing or other perimeter filtration <br /> features prior to leaving the site, and that if site conditions warrant, additional BMP's can <br /> be implemented as corrective measures the Risk Category for this site is Low Risk. <br /> B. SWPPP MINIMUM ELEMENTS <br /> 1. Mark Clearing Limits <br /> The first step in the construction process is for the contractor to flag or fence the limits <br /> of clearing/disturbance prior to any other construction activity. The engineering plans <br /> locate and provide the square footages for the areas of grading, clearing, hard surfaces <br /> and un-disturbed areas on the proposed site. Approximately 14% of the project parcel <br /> will be cleared or disturbed for this project. <br /> 2: Establish Construction Access <br /> The SWPPP calls for the existing alley to be used as the construction entrance. <br /> Contractor to modify entrance as needed during construction. At this time winter work <br /> is not expected. <br /> 3. Control Flow Rates <br /> This project is below the thresholds requiring flow control for the project. <br /> 4: Install Sediment Controls <br /> This site SWPPP proposes to construct/maintain a gravel entrance, vegetative buffer, <br /> silt fencing or a brush barrier if necessary and retention of the existing vegetation that <br /> will provide a vegetated strip between the cleared areas and any property line. The <br /> construction of these features should be completed before the clearing and grading of <br /> the site. Mulch will also be used on the exposed soil as necessary to limit erosion. <br /> L City of Everett <br /> EVERErr Reviewed for Permit 11/18/2021 <br /> Bedle Garage 21-0421 <br /> November 2021 Page 7 <br />