3400 RIVERFRONT BLVD BASE FILE 2020-07-15

i r Stormwater Pollution Prevention Plan 1.0 Introduction This Stormwater Pollution Prevention Plan (SWPPP)has been prepared for the Everett Riverfront Commercial Site in Everett, WA. The site is located just east of Everett Memorial Stadium between I-5 and the Snohomish River at the old landfill site. The existing site is approximately 59 acres, and is currently undeveloped land that used to be a landfill. The site was preloaded in the past to help with initial settling. The proposed project consists of stockpiling approximately 60,000 cubic yards of material on the northeast corner of the site to accomplish pre-settling before developing the site. Construction activities will include installing temporary erosion and sediment control best management practices, stockpiling loose dirt and gravel, and seeding the pile. 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 project. 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 websit. This SWPPP was prepared based on the requirements set forth in the Construction Stormwater General Permit, Stormwater Management Manual for Western Washington (SWMMWW 2012). 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 ostconstruction conditions. 1