1. Flow Through Turbidity Treatment Using Alum & Pam At The Orlando International Airport Project

2. Rim-ditch Dewatering Next To Active Runway

3. Rim-ditch Discharges To Existing Stormwater Detention Pond

4. Influent Turbidity Ranged Between 800-1200 NTUs

5. Existing Stormwater Pipe Used To Create Baffle Flow

6. Alum Drip Tank With Control Valve

7. Alum Drip On Influent At 50 Gal/Day PAM Floc Log Used To Bind Up Free Aluminum

8. Sand Bags Used To Create Baffle Flow In Pipes

9. Alum Floc Forming After 1 st Baffle Turn

10. Turbidity Decreased To 11 NTUs After 1 st Baffle Turn

11. Outfall To Wetland

12. Outfall To Wetland Clear Discharge

13. Final Discharge 10-15 NTUs

14. pH 6.5

15. Resource Protected

16. Any Questions?

17. Treatment System Performance: System Usage:90 Days Daily Volume:1,920,000 Gallons Total Pumping Volume:173 Million Gallons Alum Usage:50 Gal / Day (4500 Total) Treatment System Size:600 x 16 Ft. (Existing pipe) Turbidity Reduction (NTU):>900 (Inflow) 15 (Outflow) % Turbidity Reduction: 98 % Contractor’s System Cost: < $1,000 To Protect (>$23 Million Project) Time Lost Due To Non-Compliance:NONE!

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