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City of Everett <br /> Check Treatment Option Requested EVERETT Reviewed for Permit 10/20/2021 <br /> ❑ Chitosan enhanced sand filtration with discharge to infiltration <br /> RChitosan enhanced sand filtration with discharge to temporary holding ponds (batch) <br /> Chitosan enhanced sand filtration with discharge to surface waters (flow-through) — Streams Only <br /> ❑ Electrocoagulation <br /> ❑ Other <br /> Check chemical requested <br /> ❑ FlocClearT"' (2% chitosan acetate solution) <br /> StormKlearTm LiquiFlocTA° (1% chitosan acetate solution) <br /> StormKlear TM LiquiFloc TM (3% Chitosan acetate solution) <br /> ❑ ChitoVanTM (1% chitosan acetate solution) <br /> ❑ ChitoVanTM (1.5% chitosan acetate solution) <br /> Poly Aluminum Chloride <br /> ❑ HaloSource Dual Polymer TI <br /> ;<BHR-P50 <br /> ❑ Other <br /> *Requests to use treatment chemicals that have not received approval through the <br /> CTAPE process may require a site-specific engineering report and/or an effluent toxicity <br /> evaluation through the following publication: Laboratory Guidance and Whole Effluent <br /> Toxicity Test Review Criteria Appendix G (Publication W-R-95-80). <br /> Estimate of Treatment Period <br /> Begin date: 9/27/21 End date: 2/1/2022 <br /> I hereby certify that the following information is correct: <br /> • The Stormwater Pollution Prevention Plan (SWPPP) includes the chemical <br /> treatment system specifications and design. <br /> • The best management practices (BMPs) on the site use all known, available, and <br /> reasonable methods of treatment (AKART) and I ensure that I will maintain these <br /> BMPs at AKART. <br /> • 1 reviewed the best management practices on site or those proposed in the <br /> SWPPP and believe they will not interfere with the use of chemical treatment. <br /> • I verified through jar tests that the site soil is conducive to chemical treatment. <br /> • I verified that any treated water discharging from this site enters a stream or a <br /> stormwater system that discharges to flowing fresh water, or to lakes, marine <br /> environments, or other quiescent water bodies if the chemicals used in said <br /> discharge are previously approved by Ecology. <br /> • I verified that the CESF operators received Ecology-approved training. <br /> • I read, understand, and will follow all conditions and design criteria in the <br /> applicable use level designation(s). <br /> ECY 070-258 (Rev. 1/15) <br />