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4. SWPPP NARRATIVE (MR #2) <br /> The intent of this section is to provide the information necessary to support the <br /> engineering plans to implement a design that will; reduce, eliminate or prevent the <br /> 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 to <br /> the City. <br /> A. SITE GRADING/EROSION CONTROL RISK ASSESSMENT , <br /> Area proposed to be cleared/worked: 0.67 acres <br /> Average slope for the area of work: 2% (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 work to be disturbed is flat <br /> and construction site runoff will pass through vegetation, straw wattles and silt socks prior <br /> 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 short plat. <br /> 2: Establish Construction Access <br /> The SWPPP calls for the existing paved accesses to be used as the proposed <br /> construction entrance (BMP C105) and to be modified as needed. This shall be installed <br /> as the second step after the staking of clearing limits. The construction entrance for this <br /> project will be the access along the west side of the church. At this time winter work is <br /> expected during the wet season. <br /> 3: Control Flow Rates <br /> This project is below the thresholds that require flow control. <br /> Zillah 2-Lot SFR's 18-0605 <br /> June 2018 Page 7 <br />