7301 HARDESON RD 2019-01-11 - Laserfiche WebLink

1.0 Introduction This Stormwater Pollution Prevention Plan(SWPPP)has been prepared as part of the NPDES stormwater permit requirements for the Underwood Gartland project located within Lot 1 and Tract 999 of the Mountain View Business Center Division 9. The approximately 12.29-acre property is located within Sections 11 and 12, Township 28 North, Range 4 East. The site address is 7301 Hardeson Rd, Everett WA 98203. The project site is currently under reclamation as a part of CEMEX's sand and gravel mining operations. This project is to incorporate the construction of the proposed Hardeson Infiltration Basin. The basin will serve the development of Lot 1 and future development of Lots 2 and 3. The purpose of this SWPPP is to describe the proposed construction activities and all temporary and permanent erosion and sediment control (TESC) measures, pollution prevention measures, inspection/monitoring activities, and recordkeeping that will be implemented during the proposed construction. The objectives of the SWPPP are to: 1. Implement Best Management Practices (BMPs)to prevent erosion and sedimentation, and to identify, reduce, eliminate or prevent stormwater contamination and water pollution from construction activity. 2. Prevent violations of surface water quality, ground water quality, or sediment management standards. 3. Prevent, during the construction phase, adverse water quality impacts including impacts on beneficial uses of the receiving water by controlling peak flow rates and volumes of stormwater runoff at the Permittee's outfalls and downstream of the outfalls. This SWPPP was prepared using the Ecology SWPPP Template downloaded from the Ecology website. This SWPPP was prepared based on the requirements set forth in the Construction Stormwater General Permit, Stormwater Management Manual for Western Washington (SWMMWW 2012 as amended in 2014). The report is divided into seven main sections with several appendices that include stormwater-related reference materials. The topics presented in the each of the main sections are: Section 1 — INTRODUCTION. This section provides a summary description of the project, and the organization of the SWPPP document. Section 2 - SITE DESCRIPTION. This section provides a detailed description of the existing site conditions, proposed construction activities, and calculated stormwater flow rates for existing conditions and post—construction conditions. Section 3 — CONSTRUCTION BMPs. This section provides a detailed description of the BMPs to be implemented based on the 13 required elements of the SWPPP. Section 4 — CONSTRUCTION PHASING AND BMP IMPLEMENTATION. This section provides a description of the timing of the BMP implementation in relation to the project schedule. UNDERWOOD GARTLAND JOHNSON 63,LLC April 2017 Stormwater Pollution Prevention Plan Page.1