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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 Drainage Plans also a part of this submittal package to the City. <br />Area proposed to be cleared/worked <br />Average slope for the site: <br />Erosion Hazard of Soil <br />Critical Areas downslope <br />Site is upstream of an ESA Stream <br />0.19 acres <br />11 % (Area of Disturbance Only) <br />Low <br />No <br />No <br />Based on the above information and the fact that the area of the site to be disturbed is <br />moderate and construction site runoff will pass through silt fencing or other perimeter <br />filtration features prior to leaving the site, and that if site conditions warrant, additional <br />BMP's can be implemented as corrective measures the Risk Category for this site is <br />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 70% of the project parcel <br />will be cleared or disturbed for this project. <br />2: Establish Construction Access <br />The SWPPP calls for a stabilized construction entrance to be constructed in the location <br />of the proposed driveway. Contractor to modify entrance as needed during construction. <br />At this time winter work 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 />Haack — 74th 22-0807 <br />September 2022 Page 6 <br />