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WSB PROJECT EXPERIENCE EXAMPLE Advanced Oxidation Process (AOP) Water Treatment Plant CLIENT: ST. ANTHONY VILLAGE LOCATIO ST. ANTHONY VILLAGE, MN DURATION: 2016 - 2018 * tifl i 1 I� .� IIIIIIIIIIIIIIr, ,#W WSB provided professional engineering services to Automated control valves are used to split the flow study,design, and provide construction services for a between the unit(s)that are called for service via an 3,500 gallon per minute(gpm)AOP water treatment plant expanded plant automation control system (PLC/ to treat 1,4-Dioxane.This contaminant was detected in SCADA)to meet the City's water demands.The treated the groundwater aquifer that provides drinking water for effluent water from the treatment system is routed back the City's wells. into the pipe gallery of the existing granular activated carbon(GAC)filter building where the excess hydrogen After careful study of the advantages,disadvantages, peroxide is quenched and removed by the GAC filters. and costs for various treatment options, Ultra-Violet Light with Hydrogen Peroxide was further evaluated as the The St.Anthony Water Treatment Plant is the first most feasible treatment option to treat Dioxane in the advanced oxidation plant constructed in Minnesota that City's wells. Hydrogen peroxide absorbs ultraviolet(UV) utilizes UV light and hydrogen peroxide. light and produces hydroxyl radicals that oxidize and breakdown Dioxane to non-toxic compounds consisting WSB successfully negotiated an $11 million settlement of carbon dioxide,water,and residual chloride. Prior to with the US Army to fund the project.This funding is the design phase,a UV/Hydrogen Peroxide treatment paying for capital and long term O&M costs. system was piloted inside St.Anthony Village's existing water treatment plant.Three UV units were installed !BEY 1',SB ST;�rE GREG JOHNSON, GREG GLUNZ, DEAN inside a new masonry and precast concrete building SJOQUIST, GREG DUERR, DAN SIEBEN, STUART STEPHENS constructed adjacent to the City's existing water treatment plant.The new building includes a chemical storage room for feeding hydrogen peroxide,an electrical room,and a piping gallery.The existing effluent 2017 CEAM PROJECT OF THE YEAR - piping from the existing greens and filters was routed SPECIAL RECOGNITION into the new WTP addition,metered,and connected to the individual UV treatment units. 2019 CITY OF EXCELLENCE AWARD PUBLIC CREATIVE PROGRAMS AND SERVICES IN A Proposal for Design,Bidding,and Construction Administration for a Water Treatment Plant for City of Lino Lakes Relative Experience,Qualifications,&References 26