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a ' <br />Thomson Residence <br />Stormwater Site Plan Report <br />March 5, 2021 <br />Section V, Page 1 <br />Section V — Construction Stormwater Pollution Prevention <br />Plan (CSWPPP) <br />Section V Summary <br />Narrative <br />Erosion control details are provided consistent with the DOE Manual and the City of Everett. Erosion <br />control plan sheets are provided in full size as a part of the civil drawing set. <br />A full Construction SWPPP is not required by the Department of Ecology because the proposed area of <br />land disturbance is less than one acre (the land -disturbing activity threshold which requires the <br />completion of their SWPPP document and Construction Stormwater General Permit). The remainder of <br />this section is a discussion of the Construction SWPPP Elements per Section 2.5.2 of Volume I of the DOE <br />Manual. See the civil plans for reference. <br />Element 1: Mark Clearing Limits <br />To protect adjacent properties and to reduce the area of soil exposed to construction, the limits of <br />construction will be clearly marked before land -disturbing activities begin. Clearing limits will be to the <br />extents of necessary land disturbance for the proposed building and associated parking lot, driveways and <br />walkways. The BMPs relevant to marking the clearing limits that will be applied for this project include: <br />High Visibility Plastic or Metal Fence (BMP C103) <br />Element 2: Establish Construction Access <br />Construction access or activities occurring on unpaved areas shall be minimized, yet where necessary, <br />access points shall be stabilized to minimize the tracking of sediment onto public roads. A stabilized <br />construction entrance is proposed in the proposed parking lot. The BMPs relevant to establishing <br />construction access that will be applied for this project include: <br />Stabilized Construction Entrance (BMP C105) <br />Element 3: Control Flow Rates <br />To protect properties and waterways downstream of development sites from erosion and the associated <br />discharge of turbid waters due to increases in the velocity and peak volumetric flow rate of runoff from <br />the project site, silt fence will be installed around the north, east and south boundaries of the project site. <br />Silt Fence (BMP C233) <br />250 4th Avenue South, Suite 200 <br />Edmonds, WA 98020 <br />ENGINEERING ph.425.778.8500 1 fi.425,778.5536 <br />www, cgengi neeri ng.com <br />