1. Benjamin C. Whitehead, PE Benjamin J. Klayman, PhD, PE Case Study: Commissioning New Rapid Sand Filters at Donald K. Shine Water Treatment Plant

2. July 2010

4. Plant Flow Schematic

5. July 2010 South Treatment Facility – Phase IB Expansion

6. July 2010 Type of Filtration Six New Conventional Rapid Sand Filters Roberts Leotech Underdrain w/IMS Cap 12-inches Sand 24-inches Anthracite Water and Air Scour Backwash 1360 sq.ft. per Filter 4 gpm / sq.ft.

7. July 2010 New Filter Installation Filter Underdrain J-Tube Riser Air Scour Manifold

8. July 2010 New Filter Installation Grout Bed Grout Infill

9. July 2010 New Filter Installation Completed Underdrain

10. July 2010 Filter Media Installation

11. July 2010 Completed Filter Cell

12. July 2010 Filter Backwash Equipment Backwash Pump  Perless Pump Company  Vertical Turbine Mixed Flow  250 Hp  32 MGD @ 17.5-feet TDH Air Scour Blower  Gardner-Denver  Multi-stage Centrifugal  300 Hp  5440 scfm @ 6.2 psig

13. July 2010 Filter Backwash Backwash Sequence  Drain filter to 6-inches above media  Initiate Air Scour 2 minutes  Add 4 gpm/sq.ft. Low Rate BW (8 MGD) until just below troughs  Stop Air Scour and continue Low Rate water only to top of trough  Initiate 17 gpm/sq.ft. High Rate BW (32 MGD) 4 minutes  Low rate BW (8 MGD) for 1 minute  10 minute settling delay  Open effluent valve 2 minutes after filling starts Backwash is reclaimed / returned to raw water influent of the plant

14. July 2010 STF Filter

15. July 2010 SCADA Screen – Filter No. 13 Selection

16. July 2010 Filter Backwash – Selectable Parameters

17. July 2010 Backwash with Air Scour

18. July 2010 Backwash with Air Scour

19. July 2010 Backwash

20. July 2010 Backwash

21. July 2010 MDNRE Requirements Maintain NTU < 0.3 (<0.1 normally) < 0.1 NTU @ 7 MGD 2 Consecutive 15 min. NTU > 1.0 2 Consecutive NTU > 0.5 first 4 hours 2 Consecutive NTU > 1.0, 3 consecutive months 2 Consecutive NTU > 2.0, 2 consecutive months B&V / City of Wyoming Start-up Goals

22. July 2010 Commissioning Plan How do we get there? Careful Planning Start Slowly Filter to Rest Monitor/Operate Closely  Flow  Turbidity  Headloss

23. July 2010 Commissioning Pre-requisites  Media Washing/Screening  VOC testing  Chlorination  Instrumentation / Alarms  Monitoring / Trending  SCADA Control  Backwash Equipment  Backwash Sequence  Transfer Pumping

24. July 2010 Commissioning Plan Initial Start-up:  Initiate Filter Off-line (Filter-to-Waste) 1 MGD, Filter-to-Waste until < 0.3 NTU  Filter On-line: 1 MGD > 0.3 NTU, Initiate Settling-delay: 4 hours Re-test: <0.1 NTU up to 3 MGD Seasoning:  2 weeks up to 3 MGD  1 week off-line

25. July 2010 Commissioning Plan Performance Test: Run Filter Several minutes Backwash Place On-line, 1 to 3 MGD Ramp 0.5 MGD @ 30 min intervals  > 0.2 NTU Initiates Continuous Monitoring  > 0.3 NTU Initiates Filter-to-Waste Ramp to 7 MGD for 1 hour < 0.1NTU

26. July 2010 SCADA Screen – STF Filter Overview

27. July 2010 Filter No. 13 Start-up

28. July 2010 Filter Performance (Results) Filter Influent Turbidity: +/- 0.3 NTU Filter Effluent Turbidity: < 0.1 NTU @ 7 MGD Filter Effluent Turbidity: 0.02-0.07 after Initial Commissioning & Current Conditions Filter Headloss: 1 to 7.5-feet Run Time: 200 hours - New and Existing Filters  4X longer after expansion  Previously 40-60 hours

29. July 2010 Filter Performance Meurer Research Inc. Plate Settling Equipment

30. July 2010 Field Engineering Improvements Reduced Washwater Quantity  Reduced High Rate Wash: 10 minutes to 4 minutes  Total Wash Volume = 75 gal / sq.ft. (100,000 gal)  Industry Standard = 150-180 gal / sq.ft. (250,000 gal)  Allows for 5 Consecutive Backwashes to Reclaim Operator Adjustable Settling Delay Washwater Launder Stabilization Headloss Instrumentation Calibration Air Distribution Optimization

31. July 2010 - 31 Questions?