1. South Fork WT Plant Tour 5/1/2007 South Fork WT Plant Tour 5/1/2007

2. Water Source: The Clackamas River

3. Tour Guide Mark Cage South Fork WT Plant 15962 S Hunter Ave. Oregon City, Oregon 97045, (503) 657-5030

4. The Control Room: Where all Plant data is recorded The Control Room: Where all Plant data is recorded

5. SCADA Supervisory Control And Data Acquisition

6. SCADA Stats: Plant during tour is running at 10.3 MGD Plant during tour is running at 10.3 MGD Plant runs at approximately 6 MGD in Winter, 18 MGD in Summer Plant runs at approximately 6 MGD in Winter, 18 MGD in Summer Current Alum dosage at 4.5 parts in the Rapid Mix Current Alum dosage at 4.5 parts in the Rapid Mix Pre-feed Polymer #LT7990 dosage at.8 parts Pre-feed Polymer #LT7990 dosage at.8 parts Plant during tour is running at 10.3 MGD Plant during tour is running at 10.3 MGD Plant runs at approximately 6 MGD in Winter, 18 MGD in Summer Plant runs at approximately 6 MGD in Winter, 18 MGD in Summer Current Alum dosage at 4.5 parts in the Rapid Mix Current Alum dosage at 4.5 parts in the Rapid Mix Pre-feed Polymer #LT7990 dosage at.8 parts Pre-feed Polymer #LT7990 dosage at.8 parts

7. Pilot Filters: Conveniently located in the Control Room Dual media filters 4’ Anthracite coal 1’ Garnet sand

8. Pilot Filters: Miniature replicas of the main filters Miniature replicas of the main filters Sampled daily Sampled daily Help avoid plant shut down Help avoid plant shut down Save about ½ hour per day on the work load Save about ½ hour per day on the work load

9. Stream Current Monitor Optimizes coagulant dosage

10. Chlorine Spikes or “Slugs” Plant start-up causes 5 minute chlorine spike Plant start-up causes 5 minute chlorine spike Spike goes down as plant comes on-line Spike goes down as plant comes on-line

11. Rapid Mix Injection Order: Polymer Alum Pre-Chlorination with Sodium Hypochlorite Flash Mixed by use of pump turbulence, (no mechanical mixing takes place) Factoid: One pound Liquid Alum equals 5.3 LBS of dry Alum Polymer Alum Pre-Chlorination with Sodium Hypochlorite Flash Mixed by use of pump turbulence, (no mechanical mixing takes place) Factoid: One pound Liquid Alum equals 5.3 LBS of dry Alum

12. Polymer Delivery Polymer Delivery Pretreatment #LT7990 dosage at.8 parts #LT7990 dosage at.8 parts

13. Current Alum dosage at 4.5 parts in the Rapid Mix Current Alum dosage at 4.5 parts in the Rapid Mix Pretreatment Alum Pumps

14. Alum Tank Corrosive Material Post welded measurements Pretreatment

15. Pretreatment: Sodium Hypochlorite Chlorine Pre-feed at 0.7 Chlorine Residual at 1.0 Chlorine Pre-feed at 0.7 Chlorine Residual at 1.0

16. Pretreatment Rapid Mix well Alum Chlorine Alum, Polymer and Sodium hypochloritee Polymer

17. Flocculation Chamber with Serpentine Baffles

18. Sedimentation/Contact Basin

19. $100 Plastic Tube used to prevent wave vibration caused buy pumping – Savings: $100,000 in repairs!

20. Dual Media Filter: 4’ Anthracite Coal - 1’ Garnet Sand.4’ Anthracite Coal - 1’ Garnet Sand. Backwash after approximately 70hrs depending on turbidity.Backwash after approximately 70hrs depending on turbidity. Filter Aid Polymer is used.Filter Aid Polymer is used. Flow approximately 2000 GPM during tour.Flow approximately 2000 GPM during tour.

21. View of Pipe gallery While Standing over Clear Well (.55 Million Gallons)

22. Sodium Hypochlorite Generation: Injection of salt water reacts with 700 amps of electricity and titanium plates. Produces 600 lbs 0.8% NaOCl per day (300 lbs per cell). Disinfection:

23. Sodium Hypochlorite Generation: Injection of salt water reacts with 700 amps of electricity and titanium plates. Produces 300 lbs 0.8% NaOCl per day. Two cells= 600 lbs On-site Generation of Disinfectants (OSG)

24. Hydrogen bubbles Anode Cathode 2Cl - >> Cl 2 + 2e- 2H 2 O + 2e->>H 2 + 2OH- NaCl + H 2 O >>>NaOCl + H 2 HOCl + OH->>H 2 O +OCl- cell Water Softener Brine tank

25. On-site Generation of Disinfectants (OSG) Advantages: Operator safety: No toxic chlorine gas handling, safety and regulation Greener solution: No chemical shipments (all you need is pure NaCl) Minimal storage

26. On-site Generation of Disinfectants (OSG) Disadvantages: Hydrogen gas generation: Toxic, colorless, flammable (vent) regulation Need steady water composition and have to soften water Cell maintenance: Need to wash with muriatic acid (HCl)

27. Chlorine Meters

28. Chlorine Stats: Chlorine Pre-feed at 0.7 Chlorine Residual at 1.0 Chlorine Pre-feed at 0.7 Chlorine Residual at 1.0

29. High Turbidity: The technique used at South Fork for dealing with extremely high turbidity is to use both Polymer and Alum in increased dosages.

30. Soda Ash Delivery Dry hopperDry hopper Lead and Copper RuleLead and Copper Rule

31. Soda Ash mixer

32. Soda Ash in bags used for pH adjustment

33. End