General Electric – Housatonic River Project November 6, 2002 Overview of NAPL and Groundwater Programs Mike Nalipinski EPA New England Mike Nalipinski.

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Presentation transcript:

General Electric – Housatonic River Project November 6, 2002 Overview of NAPL and Groundwater Programs Mike Nalipinski EPA New England Mike Nalipinski EPA New England

General Electric - Housatonic River Project: Slide 2 Groundwater Management Area (GMA) Map

General Electric - Housatonic River Project: Slide 3 Generalized Groundwater Flow Diagram

General Electric - Housatonic River Project: Slide 4 Generalized Groundwater Flow Map for GMA-1

General Electric - Housatonic River Project: Slide 5 Non-Aqueous Phase Liquids (NAPLs) Definition: Hydrocarbon Liquids (Commonly Called Oils) That Do Not Readily Mix With or Dissolve in Water (Non-Aqueous). Dense NAPLs (DNAPLs) Tend to Sink in Water. Light NAPLs (LNAPLs) Tend to Float on Water. Definition: Hydrocarbon Liquids (Commonly Called Oils) That Do Not Readily Mix With or Dissolve in Water (Non-Aqueous). Dense NAPLs (DNAPLs) Tend to Sink in Water. Light NAPLs (LNAPLs) Tend to Float on Water.

General Electric - Housatonic River Project: Slide 6 NAPLs at the GE - Housatonic River Site Pyranol: Mixture of PCBs (Aroclors 1254 or 1260) with Trichlorobenzene. Acts as a DNAPL.Pyranol: Mixture of PCBs (Aroclors 1254 or 1260) with Trichlorobenzene. Acts as a DNAPL. Aroclor 1260: PCB oil. Acts as a DNAPL.Aroclor 1260: PCB oil. Acts as a DNAPL. 10C Insulating Oil: Petroleum distillate (mineral oil). Acts as an LNAPL.10C Insulating Oil: Petroleum distillate (mineral oil). Acts as an LNAPL. Coal Tar: Manufactured Gas Plant sludge and liquids. Acts as an LNAPL or DNAPL.Coal Tar: Manufactured Gas Plant sludge and liquids. Acts as an LNAPL or DNAPL. Pyranol: Mixture of PCBs (Aroclors 1254 or 1260) with Trichlorobenzene. Acts as a DNAPL.Pyranol: Mixture of PCBs (Aroclors 1254 or 1260) with Trichlorobenzene. Acts as a DNAPL. Aroclor 1260: PCB oil. Acts as a DNAPL.Aroclor 1260: PCB oil. Acts as a DNAPL. 10C Insulating Oil: Petroleum distillate (mineral oil). Acts as an LNAPL.10C Insulating Oil: Petroleum distillate (mineral oil). Acts as an LNAPL. Coal Tar: Manufactured Gas Plant sludge and liquids. Acts as an LNAPL or DNAPL.Coal Tar: Manufactured Gas Plant sludge and liquids. Acts as an LNAPL or DNAPL.

General Electric - Housatonic River Project: Slide 7 NAPL Conceptual Diagram

General Electric - Housatonic River Project: Slide 8 Approximate Extent of LNAPL & DNAPL – Spring 2001

General Electric - Housatonic River Project: Slide 9 Approximate Extent of LNAPL at Unkamet Brook Area

General Electric - Housatonic River Project: Slide 10 NAPL Performance Standards No Discharge of NAPL to Surface Water or Sediments Around or Under Barriers. Eliminate NAPL from Wells Near River and Lake Banks. Reduce NAPL in all Wells to Minimize Potential NAPL Migration to Surface Water and Help Achieve Groundwater Standards. Demonstrate that NAPL Near Buildings Doesn’t Adversely Affect Indoor Air Quality. No Discharge of NAPL to Surface Water or Sediments Around or Under Barriers. Eliminate NAPL from Wells Near River and Lake Banks. Reduce NAPL in all Wells to Minimize Potential NAPL Migration to Surface Water and Help Achieve Groundwater Standards. Demonstrate that NAPL Near Buildings Doesn’t Adversely Affect Indoor Air Quality.

General Electric - Housatonic River Project: Slide 11 Sheetpile Containment Barrier & NAPL Recovery Well

General Electric - Housatonic River Project: Slide 12 Summary of GMA-1 NAPL Recovery by GE

General Electric - Housatonic River Project: Slide 13 Groundwater Treatment Plant and Recovery Well 64-R

General Electric - Housatonic River Project: Slide 14 NAPL Remediation Animation,

General Electric - Housatonic River Project: Slide 15

General Electric - Housatonic River Project: Slide 16

General Electric - Housatonic River Project: Slide 17

General Electric - Housatonic River Project: Slide 18

General Electric - Housatonic River Project: Slide 19

General Electric - Housatonic River Project: Slide 20

General Electric - Housatonic River Project: Slide 21

General Electric - Housatonic River Project: Slide 22

General Electric - Housatonic River Project: Slide 23

General Electric - Housatonic River Project: Slide 24

General Electric - Housatonic River Project: Slide 25 Groundwater Quality Standards Massachusetts Contingency Plan (MCP) MCP GW-2 Standards – Do not Exceed GW-2 Concentrations in Compliance Wells Near Buildings to Prevent Adverse Effects to Indoor Air Quality. MCP GW-3 Standards – Do not Exceed GW-3 Concentrations in Monitoring Wells to Protect Surface Water from Contaminated Groundwater Discharge. MCP GW-2 Standards – Do not Exceed GW-2 Concentrations in Compliance Wells Near Buildings to Prevent Adverse Effects to Indoor Air Quality. MCP GW-3 Standards – Do not Exceed GW-3 Concentrations in Monitoring Wells to Protect Surface Water from Contaminated Groundwater Discharge.

General Electric - Housatonic River Project: Slide 26 MCP Groundwater Quality Standards - Example Table Analyte GW-2 Standard (ppm) GW-3 Standard (ppm) Total PCBsNot Applicable Chlorobenzene10.5 1,2,4-Trichlorobenzene100.5 Trichloroethene (TCE)0.320 Naphthalene66

General Electric - Housatonic River Project: Slide 27 GW-2 & GW-3 Compliance Wells

General Electric - Housatonic River Project: Slide 28 Groundwater Monitoring Well Installation & Sampling

General Electric - Housatonic River Project: Slide 29 Groundwater Monitoring Program Baseline Groundwater Monitoring Program Designed to Establish Current Conditions Quarterly Water Level Monitoring Semi-annual Groundwater Quality Sampling for Two Years Long-Term Groundwater Monitoring Program Designed to Verify Attainment of Standards Over Time Program Specifics to be Determined After Baseline Program is Completed Monitoring/Sampling to be Conducted at Intervals of No More Than 2 Years. Baseline Groundwater Monitoring Program Designed to Establish Current Conditions Quarterly Water Level Monitoring Semi-annual Groundwater Quality Sampling for Two Years Long-Term Groundwater Monitoring Program Designed to Verify Attainment of Standards Over Time Program Specifics to be Determined After Baseline Program is Completed Monitoring/Sampling to be Conducted at Intervals of No More Than 2 Years.

General Electric - Housatonic River Project: Slide 30 Groundwater Sampling/Testing Team

General Electric - Housatonic River Project: Slide 31 GMA-1 & GMA-5 Compliance Wells

General Electric - Housatonic River Project: Slide 32 GMA-2 & GMA-4 Compliance Wells

General Electric - Housatonic River Project: Slide 33 GMA-3 Compliance Wells

General Electric – Housatonic River Project November 6, 2002 Overview of NAPL and Groundwater Programs