1001 N BROADWAY EVCC PARKING 2018-12-03

- . • • Minimum Requirement #1: Stormwater Site Plan Preparation Engineering drawings have been prepared. This memo outlines the minimum requirements for this small size project and summaries how these requirements are met. Minimum Requirement#2: Construction Stormwater Pollution Prevention This project has a total land disturbing activity of less than one acre. Based on the project size, the "Small Parcel Requirements" apply to this project. A Temporary Erosion Control Plan has been prepared for this project. Erosion and sediment control BMPs have been integrated into the plan. Minimum Requirement#3: Source Control of Pollution No potential pollution sources are identified in this project. Minimum Requirement #4: Preservation of Natural Drainage Systems and Outfalls This project will discharge directly into the City of Everett's combined sewer system. Minimum Requirement#5: On-site Stormwater Management Bioretention cells will be constructed to encourage intiltration of Stormwater runoff from the site. Minimum Requirement #6: Runoff Treatment According to the Public Works Director Interim Policy, Runoff Treatment is not required for this project because the project is located in the combined sewer area. Minimum Requirement #7: Flow Control According to the Public Work Director Interim Policy Flow Control is not required far this project. The existing site conditions are building roof and paved parking lot (100% impervious area). The proposed project is replacing these impervious with new paving and landscaping areas. In other word, the proposed project will reduce impervious areas on site. Thus, the project will decrease storm runoff peak flows and reduce the impact to the existing combined sewer system. H:A21 Cp\1�\018 EvCC College Plara Suitc B Demo&Parking Lot\H��draulics\Drainage Memo 0731 I�.doc ; � ( v" �� ' \_