7301 HARDESON RD 2019-01-11 - Laserfiche WebLink

3.0 Construction Stormwater BMPs 3.1 The 13 BMP Elements This section provides a detailed description of the BMPs to be implemented based on the 13 required elements of the SWPPP. Alternate BMPs for each element are included in Appendix C as a quick reference tool for the onsite inspector in the event the BMP(s) listed below are deemed ineffective or inappropriate during construction to satisfy the requirements set forth in the General NPDES Permit(Appendix D). To avoid potential erosion and sediment control issues that may cause a violation(s) of the NPDES Construction Stormwater permit(as provided in Appendix D), the Certified Erosion and Sediment Control Lead will promptly initiate the implementation of one or more of the alternative BMPs listed in Appendix C after the first sign that existing BMPs are ineffective or failing. 3.1.1 Element#1 —Mark Clearing Limits To protect adjacent properties and to reduce the area of soil exposed to construction, the limits of construction will be clearly marked before land-disturbing activities begin. Trees that are to be preserved, as wellas all sensitive areas and their buffers, shall be clearly delineated, both in the field and on the plans. In general, natural vegetation and native topsoil shall be retained in an undisturbed state to the maximum extent possible. The BMPs relevant to marking the clearing limits that will be applied for this project include: BMP C233: Silt Fence 3.1.2 Element#2—Establish Construction Access Construction access or activities occurring on unpaved areas shall be minimized, yet where necessary, access points shall be stabilized to minimize the tracking of sediment onto public roads, and wheel washing, street sweeping, and street cleaning shall be employed to prevent sediment from entering state waters. All wash wastewater shall be controlled onsite. The specific BMPs related to establishing construction access that will be used on this project include: BMP C1O5: Stabilized Construction Entrance BMP C 107: Construction Road/Parking Area Stabilization Construction access shall be from the entrance on Sievers and Duecy Blvd. 3.1.3 Element#3—Control Flow Rates In order to protect the properties and waterways downstream of the project site, stormwater discharges from the site will be controlled. The specific BMPs for flow control that shall be used on this project include: BMP C233: Silt Fence BMP C241: Temporary Sediment Pond UNDERWOOD GARTLAND JOHNSON 63,LLC April 2017 Stormwater Pollution Prevention Plan Page 4