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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. Michael Tamblin, P.E., BCEE Stearns & Wheler, LLC. Presentation Overview. Background Summary of Projects Water Wastewater Acknowledgements. Facts:. 5 Towns 19 Villages

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Michael Tamblin, P.E., BCEE Stearns & Wheler, LLC

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

  2. Presentation Overview • Background • Summary of Projects • Water • Wastewater • Acknowledgements

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

  4. County Area (Square Miles) Population (Persons) Dutchess 802 280,150 349 Orange 816 341,367 418 Putnam 231 95,745 414 Rockland 174 286,753 1,648 Sullivan 970 73,966 76 Ulster 1,126 177,749 158 Westchester 433 923,459 2,133 Background Information 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 ProposedWater Reuse Sources Precipitation Ramapo River

  7. Rockland County ProposedWater Reuse Exports Surface Water Treatment Plants

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

  9. Rockland County ProposedWater Reuse Reuse Orangeburg Western Ramapo

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

  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

  18. Schematic of Western Ramapo AWT Membrane Filters Primary Settling Tanks Final Settling Tanks Biological Nutrient Removal Tanks Sand Filters Raw Sewage Screening and Grit Removal Chemical Addition Effluent Pump Station Effluent Force Main to the Ramapo River Post Aeration Disinfection Cl2 (Optional) SO2 (Optional)

  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 Availability to Rockland County Users Existing Flow 8-10 mgd, 90% of the time 0 mgd, 10% of the time 1 mgd 8-10 mgd, 95% of the time 0 mgd, 5% of the time 3 mgd 8-10 mgd, 98% of the time 0 mgd, 2% of the time 5 mgd 8-10 mgd, >99% of the time 0 mgd, <0% of the time 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

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