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Wastewater Treatment & Collection System Improvements

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Treatment Plant Improvements Replace aged infrastructure Increase hydraulic and organic capacity Provide new technology to address facility compliance challenges Provide ability to divert, hold and return influent flow during high flow events (precipitation, snow melt, etc.) Convert the WWTP from a seasonal discharger to a continuous discharge

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Summary of Improvements New head works (screening/grit removal) Conversion of Lagoon #4 to excess flow basin Install new septage receiving station Install new Oxidation Ditch & refurbish existing Oxidation Ditch Provide two new final clarifiers Provide new ultraviolet disinfection system for plant discharge New final effluent cascade aeration New plant electrical system including new standby generator

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Construction Status Estimated date of substantial completion January 1, 2015 Difficult winter construction period Due to increased efforts this spring back on estimated schedule Challenging site access conditions (thank you to our neighbors)

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Construction Progress Electrical bank New Oxidation Ditch Two new clarifiers Septage receiving building Pictures

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WWTP Entrance Road

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Existing Oxidation Ditch left foreground New Oxidation Ditch Right foreground Two New Final Clarifiers - Background

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New Oxidation Ditch reinforcement steel

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New Oxidation Ditch

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North Final Clarifier

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Electrical Equipment

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Interim Operations Plan Period: June1 August 31 Both Oxidation Ditches out of service (constructability) WWTP will store influent in 3 existing lagoons September 1 existing oxidation ditch will return to service, resume active treatment of influent flow to plant As influent flow volumes allow redirect stored influent wastewater back through active oxidation ditch process

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Interim Ops Plan Pros Takes place during normal no discharge period Expedites construction Most efficient method of facility completion Best available treatment season for lagoon activity Working with non-domestic users to minimize discharge to WWTP Cons No mechanical facility treatment Odor generating potential Storage volume availability Extended period to treat accumulated influent

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Collection System Improvements New main pump station (PS #16) replaces PS #6 Replace PS #4 with new PS #4 Sewer rehabilitation

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New PS #16

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New PS #4

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Sewer Rehab Work

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Wastewater Treatment & Collection System Improvements Questions/Comments