1. Persevering to Get What You Need Mark Estes HCSA Executive Director Scott Ehrhardt P.E, George Anipsitakis PhD P.E, HCSA Maple Ave Regional WWTP Expansion

2. North Carolina AWWA-WEA Annual Conference January 1, 2008 Three localities – Halifax County, Towns of Halifax & South Boston Three governing bodies, three sets of employees Five different rate structures Multiple Interjurisdictional Contracts Financial Challenges; $80,000 cash – $500,000 line of Credit July 2010, Authority awarded $5,000,000 low interest loan ($2.25%) and $10,400,000 grant from RD to refund existing debt and expand South Boston WWTP. HCSA also received $640,000 Tobacco Commission grants & $485,000 EPA STAG grant. 2 | HCSA Maple Ave Regional WWTP Expansion Persevering to Get What You Need Background

3. North Carolina AWWA-WEA Annual Conference Background 3 | HCSA Maple Ave Regional WWTP Expansion Persevering to Get What You Need

4. North Carolina AWWA-WEA Annual Conference Maple Ave WWTP – Phases of Upgrade 1960,1971,1982,1995,1988 Cowford (staffing, O&M, aged equipment 28yrs) New 95 MW Biofuel Power Plant-- request for 1 MGD reclaim wastewater NPDES Permit for Water Plant requiring discontinuation of discharge to local receiving stream $1.8M old debt requiring refinancing Problem or Opportunity? 4 | HCSA Maple Ave Regional WWTP Expansion Persevering to Get What You Need

5. North Carolina AWWA-WEA Annual Conference Construct automatic sludge removal equipment and equalization tankage at the WTP to divert discharge to the Maple Ave WWTP Construct a reclaim system to meet SBE 1.0 MGD demand Upgrade and Expand Maple Ave WWTP from 2.0 MGD to 3.5 MGD Decommission Cowford WWTP and Pump to Maple Avenue WWTP Secure Funding – Combination Loan and Grant (Including American Recovery Funds) Total Capital Needs for project; $19 M ($14.8M Grant) Fund Sources; USDA-RD, DEQ STAG, Tobacco, DHCD, EDA User Rate Impact; minimum user = $33.00 Solutions 5 | HCSA Maple Ave Regional WWTP Expansion Persevering to Get What You Need

6. North Carolina AWWA-WEA Annual Conference Halifax County Service Authority Maple Ave. WWTP (Expansion to 3.5 MGD) 6 | HCSA Maple Ave Regional WWTP Expansion Persevering to Get What You Need SEPTAGE RECEIVING STATION AERATION SPLITTER BOX BLOWER BUILDING EXISTING AERATION UNIT CLARIFIER C1 & C2 CLARIFIERC3 MOTOR CONTROL CENTER SECONDARY CLARIFIER SPLITTER BOX PROPOSED AERATION UNIT UV DISINFECTION / CASCADE AERATION SLUDGE DIGESTOR SD-2 SD-2 SLUDGE DEWATERING BUILDING HEADWORKS & PUMP STATION LABORATORY RENOVATION

7. North Carolina AWWA-WEA Annual Conference Site Limitations and Conflicts RR crossing Floodway Impact Mitigation Conflicts with past 4 separate phases of construction Unsuitable soils Project Challenges & Lessons Learned 7 | HCSA Maple Ave Regional WWTP Expansion Persevering to Get What You Need

8. North Carolina AWWA-WEA Annual Conference Project Challenges & Lessons Learned 8 | HCSA Maple Ave Regional WWTP Expansion Persevering to Get What You Need

9. North Carolina AWWA-WEA Annual Conference Critical Sequence of Construction Electrical work occurring simultaneous with other work (MCC critical --new electrical service added so old service could maintain feed to existing equipment) Reclaim system required in advance of completion of WWTP Expansion Impact to project due to local drain on labor pool Successful Negotiation for Equitable Resolution of Contract delays Project Challenges & Lessons Learned 9 | HCSA Maple Ave Regional WWTP Expansion Persevering to Get What You Need

10. North Carolina AWWA-WEA Annual Conference Innovative Design Features 10 | HCSA Maple Ave Regional WWTP Expansion Persevering to Get What You Need FeatureBenefit Reclaim System Augmented by Raw River Water Able to deliver reclaim at greater than 100% of WWTP Flow Much lower cost of water treatment and delivery than potable water Conversion of CL 2 contact tank Multipurpose use of existing structure Simple and efficient cobblestone aeration Digester Configuration Significant energy savings over air-only mixing systems Match O 2 demand while maintaining adequate mixing Efficient scour of bottom sludge deposits Compact Sludge Transfer and Offloading Significant space savings Versatile offloading capability

11. North Carolina AWWA-WEA Annual Conference Flow Schematic – 0.6 MGD Augmented Flow from HCSA Raw Water Pump Station 11 | HCSA Maple Ave Regional WWTP Expansion Persevering to Get What You Need

12. North Carolina AWWA-WEA Annual Conference Raw River Water Augmentation 12 | HCSA Maple Ave Regional WWTP Expansion Persevering to Get What You Need

13. North Carolina AWWA-WEA Annual Conference Retrofit Chlorine Contact Tank with UV, Reclaim Pumps, Flume and Cascade Aeration 13 | HCSA Maple Ave Regional WWTP Expansion Persevering to Get What You Need

14. North Carolina AWWA-WEA Annual Conference 14 | HCSA Maple Ave Regional WWTP Expansion Persevering to Get What You Need

15. North Carolina AWWA-WEA Annual Conference 15 | HCSA Maple Ave Regional WWTP Expansion Persevering to Get What You Need

16. North Carolina AWWA-WEA Annual Conference 16 | HCSA Maple Ave Regional WWTP Expansion Persevering to Get What You Need

17. North Carolina AWWA-WEA Annual Conference 17 | HCSA Maple Ave Regional WWTP Expansion Persevering to Get What You Need

18. North Carolina AWWA-WEA Annual Conference 18 | HCSA Maple Ave Regional WWTP Expansion Persevering to Get What You Need

19. North Carolina AWWA-WEA Annual Conference FeatureBenefit Biological contact tank (BCT)1.Fast startup 2.Conservation of active biomass 3.Lower solids loading to the clarifiers 4.Fast recovery 5.No chemical addition Influent flow splittingSimplicity and ease of operation Large anaerobic selector1.Full denitrification potential 2.Better settling 3.Alkalinity recovery Hybrid blower systemEnergy efficiency and cost savings Modern secondary clarifiers with dedicated RAS pumps and flowmeters Higher throughput and better control of sludge blankets and return sludge flow Shared peristaltic hose pumps for scum and WAS Fewer moving parts and ease of operation Innovative Features and Benefits 19 | HCSA Maple Ave Regional WWTP Expansion Persevering to Get What You Need

20. North Carolina AWWA-WEA Annual Conference BCT Process for Wet Weather 20 | HCSA Maple Ave Regional WWTP Expansion Persevering to Get What You Need

21. North Carolina AWWA-WEA Annual Conference Aeration Basin 21 | HCSA Maple Ave Regional WWTP Expansion Persevering to Get What You Need

22. North Carolina AWWA-WEA Annual Conference Aeration Basin 22 | HCSA Maple Ave Regional WWTP Expansion Persevering to Get What You Need

23. North Carolina AWWA-WEA Annual Conference Influent Splitter Box 23 | HCSA Maple Ave Regional WWTP Expansion Persevering to Get What You Need

24. North Carolina AWWA-WEA Annual Conference Blowers 24 | HCSA Maple Ave Regional WWTP Expansion Persevering to Get What You Need

25. North Carolina AWWA-WEA Annual Conference Blowers 25 | HCSA Maple Ave Regional WWTP Expansion Persevering to Get What You Need

26. North Carolina AWWA-WEA Annual Conference Secondary Clarifiers - Depth 26 | HCSA Maple Ave Regional WWTP Expansion Persevering to Get What You Need

27. North Carolina AWWA-WEA Annual Conference Secondary Clarifiers – Floc 27 | HCSA Maple Ave Regional WWTP Expansion Persevering to Get What You Need

28. North Carolina AWWA-WEA Annual Conference Secondary Clarifiers – Baffles 28 | HCSA Maple Ave Regional WWTP Expansion Persevering to Get What You Need

29. North Carolina AWWA-WEA Annual Conference RAS Pumping 29 | HCSA Maple Ave Regional WWTP Expansion Persevering to Get What You Need

30. North Carolina AWWA-WEA Annual Conference WAS and Scum Pumping 30 | HCSA Maple Ave Regional WWTP Expansion Persevering to Get What You Need

31. North Carolina AWWA-WEA Annual Conference Ongoing Operational Challenge of Modernized Facility with Aging Workforce An Opportunity Indeed! Closing 31 | HCSA Maple Ave Regional WWTP Expansion Persevering to Get What You Need

32. North Carolina AWWA-WEA Annual Conference Comments, Questions? Closing 32 | HCSA Maple Ave Regional WWTP Expansion Persevering to Get What You Need