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<br />Page 7 of 23 <br />Category 2: Sensitive information <br />Category 2: For official use only / disclosure permissible by law. <br />SECTION 2 - SPECIFICATIONS <br /> <br />2.1 INTENT <br />The City of Everett is seeking a supplier to provide two (2) stormwater treatment structures for an <br />upcoming project. The treatment structures must be manufactured to meet site constraints and match <br />proposed elevations and pipe configurations. The proposed units must be delivered to the project site <br />ready to be installed in accordance with the manufacturer's recommended installation procedures. <br />Commissioning, applicable media installation, and inspections shall be provided by the product <br />manufacturer. However, installation of the structures is not within the scope of this Invitation for Bid and <br />will be completed through other contracting mechanisms. <br />This project is funded by a Washington State Department of Ecology grant to improve the water quality in <br />the stormwater runoff at an outfall location within the City of Everett limits. <br />2.2 BACKGROUND <br />The stormwater treatment structures were selected to meet the needs of the city as a part of an Ecology <br />Grant project. The purpose of the project is to improve water quality in Beverly Lake and Pigeon Creek No. <br />1 through design and installation of various stormwater treatment systems. The systems will treat <br />stormwater runoff from approximately twenty-seven (27) acres of contributing area. <br />The Stormwater Management StormFilter uses rechargeable, media-filled cartridges to absorb and retain <br />pollutants from stormwater runoff including total suspended solids, hydrocarbons, nutrients, metals, and <br />other common pollutants. StormFilter performance has been verified by the State of Washington <br />Department of Ecology, as well as numerous other stormwater regulatory agencies. <br />Modular Wetlands® Linear (MWS) systems are a biofiltration system that use a patented horizontal flow <br />to treat stormwater, which improves performance, reduces footprint, and minimizes maintenance. The <br />MWS Linear replicates natural processes to remove a variety of pollutants from stormwater runoff <br />including fine total suspended solids (TSS), bacteria, oils, and grease, as well as heavy metals and harmful <br />nutrients like nitrates and phosphorus. <br />The StormFilter and Modular Wetlands System Linear unit has been Washington State Technology <br />Assessment Protocol – Ecology (TAPE) for General Use Level Designation (GULD) for the MWS-Linear <br />Modular Wetlands Stormwater Treatment System for Basic, Phosphorus, and Enhanced treatment. <br />2.3 SPECIFICATIONS <br />The manufacturer must review the provided drawings prior to casting to identify concerns that may <br />impact their ability to construct the unit. Concerns must be brought to the City’s project manager for <br />resolution prior to casting. <br />City provided drawings are identified in Appendix A. <br />A. StormFilter <br />1. The unit must be a StormFilter of the size and type shown in Drawing SD3. <br />2. The unit must include required filter cartridges for operation. <br />3. Precast concrete vault must be provided according to ASTM C857 and C858. Vault components <br />must comply with the following: