1. FLOW THROUGH WATER TREATMENT SYSTEM USING ALUM & PAM REEDY CREEK IMPROVEMENT DISTRICT

2. BRIDGE DEMOLITION PROJECT @ EPCOT WINTER 2000

3. High Pressure Water Blasting To Remove Concrete Down To Rebar

4. After Blasting With 15,000 psi Water Jet

5. Runoff Turbidity Greater Than 300 NTUs

6. Runoff Diverted Into Bridge Stormwater System

7. Aluminum Sulfate Added Via Gravity Feed From Trailer Rig

8. Wood Baffle Boards Skim Large Concrete Debris & Provide Alum Mixing

9. Runoff Flows Into 1st Cell Of Three Stage Treatment System (Inflow >300 NTU)

10. 1st Stage Treatment: Inflow>300 NTU Outflow 30 NTU

11. 2nd Stage Treatment: Inflow 30 NTU Outflow 17 NTU

12. Polyacrylamide (PAM) Floc Log Used For Final Polishing (40-50% Turbidity Reduction) & Free Aluminum Binding

13. Final Discharge Water Sheet Flows Over Grass Berm (Trapping Sediment)Then Into Canal Behind Floating Turbidity Boom

14. Canal Receiving Water 15 NTU Final Discharge Water 10-12 NTU

15. Self Contained Water Treatment System

16. Treatment System Performance: System Usage:15 Days Daily Volume:80,000 Gallons Total Pumping Volume:96 Million Gallons Alum Usage:40 Gal / Day (600 Gal Total) Treatment System Size:50 x 15 Ft. Turbidity Reduction (NTU):>300 (Inflow) 15 (Outflow) % Turbidity Reduction:95 % Contractor’s System Cost:< $1,000 Time Lost Due To Non-Compliance:NONE!

17. Contractor:Hubbard Construction Contact:Jeff Forsythe (407)560-0442