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  • Discussion Points: Presentation to the Housatonic River Citizens Coordinating Council (CCC) meeting held at Berkshire Community College on November 6, 2002.
  • Transcript

    • 1. Overview of NAPL and Groundwater Programs Mike Nalipinski EPA New England
    • 2. Groundwater Management Area (GMA) Map
    • 3. Generalized Groundwater Flow Diagram
    • 4. Generalized Groundwater Flow Map for GMA-1
    • 5. Non-Aqueous Phase Liquids (NAPLs) <ul><li>Definition : Hydrocarbon Liquids (Commonly Called Oils) That Do Not Readily Mix With or Dissolve in Water (Non-Aqueous). </li></ul><ul><li>Dense NAPLs (DNAPLs) Tend to Sink in Water. </li></ul><ul><li>Light NAPLs (LNAPLs) Tend to Float on Water. </li></ul>
    • 6. NAPLs at the GE - Housatonic River Site <ul><li>Pyranol: Mixture of PCBs (Aroclors 1254 or 1260) with Trichlorobenzene. Acts as a DNAPL. </li></ul><ul><li>Aroclor 1260: PCB oil. Acts as a DNAPL. </li></ul><ul><li>10C Insulating Oil: Petroleum distillate (mineral oil). Acts as an LNAPL. </li></ul><ul><li>Coal Tar: Manufactured Gas Plant sludge and liquids. Acts as an LNAPL or DNAPL. </li></ul>
    • 7. NAPL Conceptual Diagram
    • 8. Approximate Extent of LNAPL &amp; DNAPL – Spring 2001
    • 9. Approximate Extent of LNAPL at Unkamet Brook Area
    • 10. NAPL Performance Standards <ul><li>No Discharge of NAPL to Surface Water or Sediments Around or Under Barriers. </li></ul><ul><li>Eliminate NAPL from Wells Near River and Lake Banks. </li></ul><ul><li>Reduce NAPL in all Wells to Minimize Potential NAPL Migration to Surface Water and Help Achieve Groundwater Standards. </li></ul><ul><li>Demonstrate that NAPL Near Buildings Doesn’t Adversely Affect Indoor Air Quality. </li></ul>
    • 11. Sheetpile Containment Barrier &amp; NAPL Recovery Well
    • 12. Summary of GMA-1 NAPL Recovery by GE
    • 13. Groundwater Treatment Plant and Recovery Well 64-R
    • 14. NAPL Remediation Animation, 1986 - 2000
    • 15. General Electric - Housatonic River Project: Slide • UNITED STATES • ENVIRONMENTAL PROTECTION AGENCY
    • 16. General Electric - Housatonic River Project: Slide • UNITED STATES • ENVIRONMENTAL PROTECTION AGENCY
    • 17. General Electric - Housatonic River Project: Slide • UNITED STATES • ENVIRONMENTAL PROTECTION AGENCY
    • 18. General Electric - Housatonic River Project: Slide • UNITED STATES • ENVIRONMENTAL PROTECTION AGENCY
    • 19. General Electric - Housatonic River Project: Slide • UNITED STATES • ENVIRONMENTAL PROTECTION AGENCY
    • 20. General Electric - Housatonic River Project: Slide • UNITED STATES • ENVIRONMENTAL PROTECTION AGENCY
    • 21. General Electric - Housatonic River Project: Slide • UNITED STATES • ENVIRONMENTAL PROTECTION AGENCY
    • 22. General Electric - Housatonic River Project: Slide • UNITED STATES • ENVIRONMENTAL PROTECTION AGENCY
    • 23. General Electric - Housatonic River Project: Slide • UNITED STATES • ENVIRONMENTAL PROTECTION AGENCY
    • 24. General Electric - Housatonic River Project: Slide • UNITED STATES • ENVIRONMENTAL PROTECTION AGENCY
    • 25. Groundwater Quality Standards Massachusetts Contingency Plan (MCP) <ul><li>MCP GW-2 Standards – Do not Exceed GW-2 Concentrations in Compliance Wells Near Buildings to Prevent Adverse Effects to Indoor Air Quality. </li></ul><ul><li>MCP GW-3 Standards – Do not Exceed GW-3 Concentrations in Monitoring Wells to Protect Surface Water from Contaminated Groundwater Discharge. </li></ul>
    • 26. MCP Groundwater Quality Standards - Example Table 6 6 Naphthalene 20 0.3 Trichloroethene (TCE) 0.5 10 1,2,4-Trichlorobenzene 0.5 1 Chlorobenzene 0.0003 Not Applicable Total PCBs GW-3 Standard (ppm) GW-2 Standard (ppm) Analyte
    • 27. GW-2 &amp; GW-3 Compliance Wells
    • 28. Groundwater Monitoring Well Installation &amp; Sampling
    • 29. Groundwater Monitoring Program <ul><li>Baseline Groundwater Monitoring Program </li></ul><ul><ul><li>Designed to Establish Current Conditions </li></ul></ul><ul><ul><li>Quarterly Water Level Monitoring </li></ul></ul><ul><ul><li>Semi-annual Groundwater Quality Sampling for Two Years </li></ul></ul><ul><li>Long-Term Groundwater Monitoring Program </li></ul><ul><ul><li>Designed to Verify Attainment of Standards Over Time </li></ul></ul><ul><ul><li>Program Specifics to be Determined After Baseline Program is Completed </li></ul></ul><ul><ul><li>Monitoring/Sampling to be Conducted at Intervals of No More Than 2 Years. </li></ul></ul>
    • 30. Groundwater Sampling/Testing Team
    • 31. GMA-1 &amp; GMA-5 Compliance Wells
    • 32. GMA-2 &amp; GMA-4 Compliance Wells
    • 33. GMA-3 Compliance Wells
    • 34. Overview of NAPL and Groundwater Programs

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