1. Michael Tamblin, P.E., BCEE Stearns & Wheler, LLC Protecting and Enhancing the Ramapo Watershed – A Designated Sole Source Aquifer Supplying New York and New Jersey

2. Presentation Overview Background Summary of Projects Water Wastewater Acknowledgements

3. 5 Towns 19 Villages ~90% Developed ~30% Park Land/Open Space 8% Population Increase from the 1990 to 2000 Census Report Facts:

4. Background Information County Area (Square Miles) Population (Persons) Dutchess802280,150349 Orange816341,367418 Putnam23195,745414 Rockland174286,7531,648 Sullivan97073,96676 Ulster1,126177,749158 Westchester433923,4592,133 Population Density (Persons per Square mile)

5. Background Information Water Systems United Water of New York (29 mgd) Nyack Water (2 mgd) Village of Suffern (1.8 mgd) Private Wells Wastewater Systems Rockland County Sewer District No. 1 (28.9 mgd) Haverstraw Joint Regional Sewerage Board (8 mgd) Stony Point Sewer District (1 mgd) Town of Orangetown (12.75 mgd) Village of Suffern (1.8 mgd)

6. Rockland County Proposed Water Reuse Precipitation Ramapo River Sources

7. Rockland County Proposed Water Reuse Surface Water Treatment Plants Exports

8. Rockland County Proposed Water Reuse Surface Water Treatment Plants Combined Precipitation Ramapo River

9. Rockland County Proposed Water Reuse Orangeburg Western Ramapo Reuse

10. Rockland County Proposed Water Reuse Orangeburg Western Ramapo Everything Combined Surface Water Treatment Plants Precipitation Ramapo River

11. Background Information Water Source for New Jersey 2,000,000 New Jersey Users

12. Background Information Environmentally Sensitive Areas Parks, Wetlands, Floodplains, Wild, Scenic and Recreational Corridor, and Mountains Federally Designated Sole Source Aquifer Threatened and Endangered Species Historic Sites Failing Septic Systems (~10%)

13. Location

14. Project Objectives Protection of Public Health Protection of Environmental and Natural Resources Protection of Sole Source Aquifer that Serves New York/New Jersey

15. Advanced Wastewater Treatment Plant 1.5 mgd Advanced Treatment Facility Discharge Effluent to Ramapo River at Two Locations Utilize Design – Build – Operate Procurement

16. Public Concerns of Reuse Discharge of Pharmaceuticals (USGS Report) How we Address This Issue Design of the Plant Treatment Components for Future Provide a High Level of Treatment with Redundant Systems How we Address This Issue Multi Barrier Approach

17. Proposed Level of Treatment Ramapo River Quality 2.2 mg/L 52 mg/L --- 0.01 mg/L 0.06 mg/L --- 551/100 ml --- Class A Water Source Standards --- 7.0 200/100 ml 6.5-8.5 --- 5 NTU Drinking Water Standard --- 10 mg/L --- 0 99.9% Removal 99.99% Removal 0.3 NTU Parameter Biochemical Oxygen Demand (BOD 5 ) Suspended Solids Ammonia Nitrates Total Phosphorus Chlorine Residual Dissolved Oxygen Fecal Coliforms pH Giardia Cysts Enteric Viruses Turbidity WWTP Treatment Effluent <5 mg/L <1 mg/L (as N) 6-7 mg/L 0.2 mg/L 0.001 mg/L 7 mg/L 200/100 ml 6.5–8.5 99.9% Removal 99.99% Removal 1-3 NTU

18. Schematic of Western Ramapo AWT Raw Sewage Screening and Grit Removal Primary Settling Tanks Biological Nutrient Removal Tanks Final Settling Tanks Sand Filters Membrane Filters Post Aeration Disinfection Effluent Pump Station Effluent Force Main to the Ramapo River Cl 2 (Optional) SO 2 (Optional) Chemical Addition

19. Potential Benefits of Additional Flow Alleviate Drought Conditions Controlling the County’s Destiny

20. Western Ramapo Advanced Wastewater Treatment Plant Project Ramapo Valley Wellfield Operations Existing Flow8-10 mgd, 90% of the time 0 mgd, 10% of the time 1 mgd8-10 mgd, 95% of the time 0 mgd, 5% of the time 3 mgd8-10 mgd, 98% of the time 0 mgd, 2% of the time 5 mgd8-10 mgd, >99% of the time 0 mgd, <0% of the time Availability to Rockland County Users Additional Flow

21. WWTP Discharge Locations

22. AWT Site

23. Acknowledgements Rockland County Sewer District No.1/Board of Commissioners Rockland County Executive/County Legislature Stearns & Wheler Engineers

24. Questions & Answers