The Regional Bypass Workgroup A Successful Application of Water Quality Prediction and Interagency Communication Peter Sattler Interstate Environmental Commission Charles Dujardin Hydro. Qual, Inc. May 9, 2006 NWQMC 2006 Conference
Regional Bypass Workgroup – NY/NJ/CT Overview l 1997 Planned and Unplanned Discharges Causes Regional Concern l Lack of Tri-State Communication is Evident l Lack of Predictive Tool is Evident l Regional Bypass Workgroup is Formed Establish Communication Protocol Develop Predictive Tool to Assess Conditions
Regional Events of Concern l Planned Bypass at Manhattan Pumping Station Scheduled for four days @ 150 MGD NY & NJ Governors battle “Hearings” go on for months l Pipeline Leak at City Island NYC Closes Orchard Beach Westchester County Closes Beaches l NYC “Throgs Neck” Pumping Station Bypass Precautionary Closure at Orchard Beach Westchester County Closes Beaches Connecticut Closes Beaches
1997 Regional Incidents NY/NJ/CT Interstate Waters 4
Communication Begins l July ‘ 97 meeting in Tarrytown NY Attendees ( ~30) include Tri-state Regulators and Dischargers Frank Discussions l Regional Bypass Workgroup Established Communication & Notification Development of Predictive Tool
Regional Bypass Workgroup Participants l Wastewater Administration NYS DEC NJ DEP CT DEP IEC EPA NYC DEP USCG l Consultant Hydro. Qual, Inc. l Shellfish & Health NYS DEC NYS DOH NJ DEP FDA NYC DOH Nassau Co HD Westchester Co HD Rockland Co HD Suffolk Co HD NPS 6
Communication and Notification Unplanned Discharge States NYSDEC NJ/CT Notification City Health County Health Beach Operators State Shellfish Federal Agencies EPA, FDA Coast Guard IEC Oversight Note: All Parties Can Execute Modeling Tool 7
Model Development Considerations l Parameters of concern Total/Fecal Coliform Enterococci l Water bodies: NY-NJ Harbor Long Island Sound Atlantic Ocean (NJ Coast) l Variables: Temperature, Hydrodynamics Duration , Quantity & Quality of Discharge
Regional Bypass Program l Discharge Characterization Specifications Select Discharge Location Volume (MG) Concentration Water Temperature l View Results Choose Threshold Conc. (Optional) View area-wide results Select Receptor Site Location View Temporal Profile 9
Discharge Sites; Hunts Point Discharge Hydro. Qual, Inc.
Options Menu Hydro. Qual, Inc.
Receptor Sites, Hunts Point Discharge, Threshold at 70 MPN Hydro. Qual, Inc.
Hunts Point Discharge - Response at Rockaway Shores Hydro. Qual, Inc.
June 28, 1997 Throgs Neck Spill, Threshold at 2400 MPN Hydro. Qual, Inc.
June 28, 1997 Throgs Neck Spill, Response at Orchard Beach Hydro. Qual, Inc.
June 28, 1997 Throgs Neck Spill Hydro. Qual, Inc.
June 28, 1997 Throgs Neck Spill, Response at Stamford, CT Hydro. Qual, Inc.
Summary – A Success Story l Communication and Notifications Are Established Excellent Inter-agency, Inter-state Co-operation Periodic Regional Bypass Workgroup Meetings Held at IEC Discuss Yearly Findings Discuss Possible Improvements – Communications/Model Upgrades l The June 1997 Westchester, Connecticut Beach Closures Would Not Have Occurred With Regional Bypass Program l The Program Has Been Used Successfully Since 1998 No Unnecessary Beach Closures 18
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