Laserfiche WebLink
Stormwater Pollution Prevention Plan <br /> 3.0 Construction Stormwater BMPs <br /> 3.1 The 13 BMP Elements <br /> This section provides a detailed description of the BMPs to be implemented based on the 13 <br /> required elements of the SWPPP. Alternate BMPs for each element are included in Appendix C <br /> as a quick reference tool for the onsite inspector in the event the BMP(s) listed above are deemed <br /> ineffective or inappropriate during construction to satisfy the requirements set forth in the <br /> General NPDES Permit (Appendix D). To avoid potential erosion and sediment control issues <br /> that may cause a violation(s) of the NPDES Construction Stormwater permit(as provided in <br /> Appendix D), the Certified Erosion and Sediment Control Lead(CESCL) will promptly initiate <br /> the implementation of one or more of the alternative BMPs listed in Appendix C after the first <br /> sign that existing BMPs are ineffective or failing. <br /> 3.1.1 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. A large portion of <br /> the site will remain undisturbed throughout construction. Clearing limits will be delineated by <br /> silt fences and flagging. The following relevant BMPs for this project include: <br /> BMP C 103: High Visibility Plastic or Metal Fence <br /> BMP C233: Silt Fence <br /> 3.1.2 Element#2—Establish Construction Access <br /> Construction access or activities occurring on unpaved areas shall be minimized,yet where <br /> necessary, access points shall be stabilized to minimize the tracking of sediment onto public <br /> roads, and wheel washing, street sweeping, and street cleaning shall be employed to prevent <br /> sediment from entering state waters. The following relevant BMPs for this project include: <br /> BMP C 105: Stabilized Construction Entrance <br /> 3.1.3 Element#3—Control Flow Rates <br /> In order to protect the properties and waterways downstream of the project site, stormwater <br /> discharges from the site will be controlled. Throughout the project, the Sediment Basin will be <br /> removed and the vault will be installed and retrofitted to act as a construction runoff detention <br /> pond. The orifice shall be plugged to prevent anything but surface water from exiting. After <br /> construction, the vault shall be cleaned and the vault subsequently inspected by the City. The <br /> following relevant BMPs for this purpose include: <br /> BMP C240: Sediment Trap <br /> SNBL USA, LTD—Seaway Commercial Center <br /> SWPPP 5 August, 2022 <br />