1. Rhode Island Department of Environmental Management
Office of Waste Management (OWM)
Cynthia Gianfrancesco
X7126
Terry Gray X2405

2. Overview of Tonight’s Topics
Site Investigation Process
Charbert Overburden Site Investigation
Charbert Overburden Remediation
Charbert Bedrock Aquifer Investigation
Production Well Shutdown
Oversight and Enforcement
Site Security
Communications
Upcoming meetings

3. RIDEM Site Investigation and Remediation Program
All Site Investigations must be conducted in accordance with RIDEM regulations.
Investigation must include
Soil
Groundwater
Overburden
Bedrock – if necessary
Sediment - if necessary
Surface water - if necessary
Frequently includes a phased approach, especially where complex geology exists
Exceedances of RIDEM criteria must be identified and remediated

4. RIDEM Site Investigation and Remediation Program
Remediation Criteria Include:
Soil:
Direct Exposure Criteria for
Residential properties
Industrial/Commercial properties (Charbert site)
GA or GB Leachability Criteria
Groundwater Criteria
GA criteria – suitable for drinking (Richmond & rural areas)
GB criteria – not suitable for drinking (urban areas)

5. Site Investigation Pertaining to the Charbert Site
Site Investigation at the Charbert site was divided into 2 phases due to the presence of Chlorinated Solvents:
Overburden Site Investigation Report was submitted in June 2005
Supplemental Reports , and
Bedrock Investigation is on going

6. Example of Aquifer Shallow overburden aquifer ~ 50’ – 80’ thick
Confining layer ~ 10’ – 20’ thick
Deep overburden aquifer ~ 10 – 20’ thick
Bedrock aquifer ` 40’ – 120’ deep

7. Overburden Site Investigation
Over 40 monitoring wells installed
70 groundwater analysis
6 wells sampled quarterly around lagoons
14 wells sampled quarterly around SVE/AS
Over 70 soil analysis
Over 40 private well analysis
Quarterly analysis of 14, 16 & 18 River St. since February 2005.
8 Diffusion Bag sample location in Wood River - samples groundwater under river

9. Overburden Site Investigation
Identified Areas of Concern (AOCs) requiring action:
Chlorinated solvent (drycleaning) spill area
Residential Wells at 14, 16 & 18 River Street
Solid Waste Disposal Areas
Old Lagoon 5 Channel sediments
Petroleum Product Recovery Trench
Oil Line Rupture
Environmental Land Use Restriction

10. Overburden Remedial Action Work Plan October 2007 – ongoing source removal
Chlorinated solvent spill area
Soil Vapor Extraction/Air Sparge System Order of Approval issued by RIDEM December 19, 2007
Air Sparge System – injects air into ground, enhances bioremediation and strips vapors from groundwater
Soil Vapor Extraction System – enhances bioremediation and vacuums vapors from soil
Sparge Curtain – prevents migration of contaminants in groundwater to Wood River
All treated through Granular Activated Carbon prior to discharge to air
System fully operational on January 18, 2008
Extensive monitoring of system, groundwater and river to determine system performance

11. Treatment
vacuum
Air
soil
Water table
groundwater

12. 16 SVE and 16 AS wells under building 9 Horizontal SVE and 9 AS wells between building and river 5 Horizontal SVE and 5 AS wells as Sparge Curtain along river
GZML-1

13. Overburden Remedial Action Work Plan October 2007 - ongoing
Residential Wells at 14, 16 and 18 River Street
These wells were identified as needing treatment due to trace levels of chlorinated solvents and bacteria.
Possible source: former septic system
Whole House Treatment Systems were installed in January 2005 by Charbert and have been operational since.
Charbert will continue to monitor quarterly and maintain as long as is necessary.

14. Overburden Remedial Action Work Plan October 2007
Remaining RAWP Action Items for approval
Solid Waste Disposal Areas
Four areas identified during site investigation
Solid waste removed in and areas subsequently restored
Limited soil excavation required in one area for elevated arsenic

15. Overburden Remedial Action Work Plan October 2007
Remaining RAWP Action Items for RIDEM approval (con’t)
Old Lagoon 5 Channel sediments removal
Petroleum Product Recovery Trench
Oil Line Rupture removal
Long Term Monitoring
Environmental Land Use Restriction
All Activities expected to be on-going or completed by December 2008

16. Bedrock Aquifer Investigation – completed to date
Bedrock Aquifer Evaluation Work Plan–March 2006
Geophysical Investigation (ground penetrating radar) for Bedrock Aquifer Evaluation, and Recommended Bedrock Well Locations July 2006
Bedrock Wells Installed & Borehole Geophysics conducted August – December 2006
Recommended Monitoring Well Packer Installation Zones for Bedrock Boreholes, February 2007
Bedrock Aquifer Evaluation Progress Report #2, Sept. 2007
Phase II Bedrock Aquifer Evaluation Work Plan, January 29, 2008 (under review)

17. 3 bedrock wells installed 2006
3 bedrock wells installed GZML-1 ( 205 feet deep) = trace levels of VOCs GZML-2 (206 feet deep) = clean GZML-3 (160 feet deep) = high levels of VOCs
GZML-1

18. Bedrock Aquifer Investigation
Geophysical report indicates bedrock fractures are tilted away from Alton neighborhood, towards Wood River
September 2007 report confirmed bedrock contamination and zones (June and August sample results)
November 2007 DEM assisted Charbert in sampling 4 wells west of Wood River - no VOC contamination detected
RIDEM unable to confirm use of bedrock wells in Alton neighborhood.

19. Bedrock Aquifer Investigation
Schedule
Additional data collection, evaluation and well location proposal: February - August 2008
Bedrock well installation :
September 2008 – March 2009
Bedrock well sampling: March – April 2009
Bedrock Aquifer Site Investigation Report: April - June 2009.

20. Production Wells Shutdown
Production wells are still being used to a limited extend during plant shutdown
Groundwater monitoring began Feb. 18, 2008 and will continue until equilibrium has been reached to determine changes in groundwater flow, then quarterly thereafter
The groundwater depression associated with the production wells will revert to a natural state – this is not expected to adversely effect groundwater quality on the site
The groundwater mound associated with the lagoons will revert to a natural state – it is expected that this will improve groundwater quality on the site

22. DEM Oversight and Enforcement of Investigation and Remediation
Charbert’s parent company, NFA Corporation, is the responsible party
They are held to conducting all required work through the Consent Agreement and state law
In the event that they fail, DEM enforce through Superior Court

23. Site Security According to Charbert:
Property Manager on site 40 hrs/week indefinately
Security System installed in building

24. Communications Documents at Clark Memorial Library
DEM web site - with major documents and milestones

25. Upcoming Meetings April 2nd – Site Investigation and Remediation
2nd meeting – Lagoons, Wetlands and Plant Closure
3rd meeting – drinking water
4th meeting – tentative – if necessary