1. Town of Enfield : Upgrading the Water Pollution Control Facility & Collection System Jay Sheehan, PE Michael Burns, PE

2. Timeline of Major Facility Upgrades 1938 Water Pollution Control in Enfield begins 1972 Clean Water Act upgrades Secondary treatment added 1996 Sludge processing upgrade Belt filter presses, sludge storage tank & odor control system 2004 Upgrades for enhanced nitrogen removal Baffles and equipment added to aeration tank

3. Capital Plan & Rate Study - 2013  Interviewed operators  Brief tours of the plant & pump stations  Benchmarking of Enfield vs other CT plants  Reviewed upgrade concepts & costs with Town  Full financial review of utility

4. Capital Plan Results  Recommended Improvements  WPCF equipment upgrades  Collection system improvements  Totaling $36M  Established sewer fee in lieu of Ad Valorem  Full financial review of utility resulted in rate to capture capital, debt service & annual operating costs  Included public outreach

5. Facilities Plan - 2015  Intensive reviews of plant & pump stations  Met with staff to discuss operational needs  Structural & mechanical evaluations  Conducted comprehensive energy evaluation  Presented alternatives to Town  Refined alternatives to meet Town goals

6. Facilities Plan Findings  Upgrades needed for :  Need to incorporate both new & conventional technologies  Reviewed energy implications  Building rehab generally more cost effective Pump stationsClarifier mechanisms Solids handlingHeadworks OdorsBuilding upgrades PumpsAeration equipment

7. Other Facilities Plan Findings  Pump station upgrades  Indian RunReplace with submersible station  Sharp StreetReplace with submersible station  Sparkle StreetReplace with submersible station  South Maple StreetReplace pumps, roof, generator, etc.  Grape BrookReplace pumps, MCC, etc.  South RiverReplace entire station  Other 11 PS’sVarious upgrades including pumps, generators, wet wells, etc.

8. What Surprised Us? Unanticipated  Hazardous materials – worse than anticipated  Safety challenges – handrails throughout the plant don’t meet code  Leaking air discharge pipe  Building deterioration more extensive Positives  Need for septage improvements decreased  Less pipe issues in collection system  Reduced engineering/planning costs

9. Comparison of Anticipated Costs 2013 Capital Plan2015 Facilities Plan Total Planning Estimate$ 1,550,000$ 1,112,000 Total WPCF Upgrade$ 19,505,000$ 25,353,000 Total Collection System Upgrade$ 14,850,000$ 7,250,000 Total Facilities Plan Project$ 35,905,000$ 33,715,000*  Collection system deficiencies were less than anticipated  WPCF upgrades were greater than anticipated *Difference of ~$2M reserved Gravity Thickeners or priority list of other options

10. What is the Upgrade Plan?  WPCF  Rehabilitate existing buildings (necessary)  New headworks (mandatory)  Replace all major process equipment (mandatory)  Leverage new technology when appropriate  Replacement to include efficiency motors, etc.  Improve plant resiliency & energy efficiency (necessary)  Add gravity thickening (necessary)  Collection System  Major upgrade/replacement of 6 priority PS (mandatory)  Minor improvement to other PS (necessary)  Replace significant leaking air pipe (mandatory)

11. Benefits of the Upgrade Plan  Reduce energy costs (>$100K/year estimated)  Comply with NOV from DEEP (Odors)  Address non-compliance with safety & building codes  With proper maintenance and funding, the upgraded plant & collection system should avoid major upgrades like this for the foreseeable future

12. How do we pay for all of this? At $36M, the improvements are 100% funded under current rates without a rate increase

13. Recent Upgrades in Connecticut Local Municipal Utility Plant Capacity 20-year Upgrade Cost Year of Upgrade Manchester8.25 MGD$51M2011 Milford11.4 MGD$46M2009 Ansonia3.50 MGD$42M2012 South Windsor3.75 MGD$36M2012 Enfield10.0 MGD$36MTBD Glastonbury3.64 MGD$31M2011 Simsbury2.85 MGD$21M2007

14. What is the End Result?  Wastewater can receive more reliable treatment before it flows to the CT River  Enfield will be in compliance with current & next CTDEEP & EPA permits  Capital will be spent on preventative maintenance – not emergency repairs  Odors will be reduced – address NOV

15. Timeline Moving Forward 2013 Capital Plan & Rate Study 2015 Comprehensive Facilities Plan Referendum in November 2016 Detailed design of improvements Bid documents developed 2017 Public bidding of project Contractor selected Construction begins 2019 Upgraded facility start-up & commissioning Operator training

16. Questions?