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4. SWPPP NARRATIVE <br /> The intent of this section is to provide the information necessary to support the engineering <br /> plans in order to implement a design that will; reduce, eliminate or prevent the discharge of <br /> stormwater pollutants, meet or exceed the water quality and sediment management <br /> standards for the County and State, and prevent adverse impacts to the receiving waters <br /> for this project. <br /> A. SITE GRADING/EROSION CONTROL RISK ASSESSMENT <br /> Area proposed to be cleared/worked: 0.25 acres <br /> Average slope for the site: <5% (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 flat <br /> and construction site runoff will pass through silt fencing or other perimeter filtration features <br /> prior to leaving the site, and that if site conditions warrant, additional BMP's can be <br /> implemented as corrective measures the Risk Category for this site is Low Risk. <br /> B. SWPPP MINIMUM ELEMENTS <br /> 1: Preserve Vegetation and Mark Clearing Limits <br /> The first step in the construction process is for the contractor to fence the limits of <br /> clearing/disturbance (BMP C103) prior to any other construction activity. The engineering <br /> plans locate and provide the square footages for the areas of grading, clearing, impervious <br /> surfaces and un-disturbed areas on the proposed site. As much of the natural vegetation <br /> as possible will be preserved on this project (BMP C101). Approximately 100% of the site <br /> may be cleared or disturbed for this project. <br /> 2: Establish'Construction Access <br /> The SWPPP calls for the existing gravel driveway to be used as the construction entrance. <br /> At this time winter work is expected during the wet season. <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 construction entrance (BMP <br /> C105).A vegetative buffer(BMP C102),silt fencing(BMP C233)and retention of the existing <br /> vegetation(BMP C101)will provide a vegetated strip around the work area and any adjacent <br /> property line. The construction of these features should be completed before the clearing <br /> and grading of the site. <br /> • <br /> Fogg-LEXAR SLDS 19-0506 <br /> July 2019 <br /> Revised:September 2019 Page 6 <br />