Michael Tamblin, P.E., BCEE Stearns & Wheler, LLC Protecting and Enhancing the Ramapo Watershed –...
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Transcript of Michael Tamblin, P.E., BCEE Stearns & Wheler, LLC Protecting and Enhancing the Ramapo Watershed –...
Michael Tamblin, P.E., BCEEStearns & Wheler, LLC
Protecting and Enhancing the Ramapo Watershed – A Designated Sole Source Aquifer Supplying New York and New Jersey
Presentation OverviewPresentation Overview
Background
Summary of ProjectsWater
Wastewater
Acknowledgements
5 Towns
19 Villages
~90% Developed
~30% Park Land/Open Space
8% Population Increase from the 1990 to 2000 Census Report
Facts:
Background InformationBackground Information
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
Population Density(Persons per Square mile)
Background InformationBackground Information
Water SystemsUnited Water of New York (29 mgd)
Nyack Water (2 mgd)
Village of Suffern (1.8 mgd)
Private Wells
Wastewater SystemsRockland 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)
Rockland County Proposed
Water Reuse
Precipitation
Ramapo River
Sources
Rockland County Proposed
Water Reuse
Surface Water
Treatment Plants
Exports
Rockland County Proposed
Water Reuse
Surface Water
Treatment Plants
Combined
Precipitation
Ramapo River
Rockland County Proposed
Water Reuse
Orangeburg
Western Ramapo
Reuse
Rockland County Proposed
Water Reuse
Orangeburg
Western Ramapo
Everything Combined
Surface Water
Treatment Plants
Precipitation
Ramapo River
Background InformationBackground Information
Water Source for New Jersey
2,000,000 New Jersey Users
Background InformationBackground 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%)
LocationLocation
Project ObjectivesProject Objectives
Protection of Public Health
Protection of Environmental and Natural Resources
Protection of Sole Source Aquifer that Serves New York/New Jersey
Advanced Wastewater Treatment PlantAdvanced Wastewater Treatment Plant
1.5 mgd Advanced Treatment Facility
Discharge Effluent to Ramapo River at Two Locations
Utilize Design – Build – Operate Procurement
Public Concerns of ReusePublic 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
Proposed Level of TreatmentProposed Level of TreatmentRamapo River
Quality
2.2 mg/L
52 mg/L
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0.01 mg/L
0.06 mg/L
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551/100 ml
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Class A Water Source Standards
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7.0
200/100 ml
6.5-8.5
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5 NTU
Drinking WaterStandard
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10 mg/L
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0
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99.9% Removal
99.99% Removal
0.3 NTU
Parameter
Biochemical Oxygen Demand (BOD5)
Suspended Solids
Ammonia
Nitrates
Total Phosphorus
Chlorine Residual
Dissolved Oxygen
Fecal Coliforms
pH
Giardia Cysts
Enteric Viruses
Turbidity
WWTP Treatment Effluent
<5 mg/L
<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
Schematic of Western Ramapo AWTSchematic 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
Cl2
(Optional)SO2
(Optional)
Chemical Addition
Potential Benefits of Additional FlowPotential Benefits of Additional Flow
Alleviate Drought Conditions
Controlling the County’s Destiny
Western Ramapo Advanced Wastewater Treatment Plant Project Ramapo Valley Wellfield Operations
Western Ramapo Advanced Wastewater Treatment Plant Project Ramapo Valley Wellfield Operations
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
Availability to Rockland County Users
Additional Flow
WWTP Discharge LocationsWWTP Discharge Locations
AWT SiteAWT Site
AcknowledgementsAcknowledgements
Rockland County Sewer District No.1/Board of Commissioners
Rockland County Executive/County Legislature
Stearns & Wheler Engineers
Questions & AnswersQuestions & Answers