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Olin Chemical Superfund Site Public Meeting October 19, 2009 AGENDA

Olin Chemical Superfund Site Public Meeting October 19, 2009 AGENDA. Welcome/Opening Remarks – Michael Newhouse, Board of Selectmen Introductions Olin Chemical Site Overview - Jim DiLorenzo, US EPA Project Manager Brief History Superfund Process Remedial Investigation

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Olin Chemical Superfund Site Public Meeting October 19, 2009 AGENDA

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  1. Olin Chemical Superfund Site Public MeetingOctober 19, 2009AGENDA • Welcome/Opening Remarks – Michael Newhouse, Board of Selectmen • Introductions • Olin Chemical Site Overview - Jim DiLorenzo, US EPA Project Manager • Brief History • Superfund Process • Remedial Investigation • WERC (Wilmington Environmental Restoration Committee) – Martha Stevenson • Update • Public Participation - Sarah White, EPA Community Involvement Coordinator • Site documents • Community Relations Plan

  2. Olin Chemical Superfund Site

  3. October 1952 (Pre-Development)

  4. 1963 National Polychemicals, Inc.

  5. 1967National Polychemicals, Inc.

  6. Operational History • 1953 to 1986 – Manufactured specialty chemicals for the rubber/plastics industry. • 1953 to mid-1960s - Liquid wastes discharged to unlined pits and Lake Poly. • Late-1960s – Treated liquid wastes discharged to lined lagoons and municipal sewer. • 1975 to 1986 - Sludges periodically excavated from lined lagoons and created calcium sulfate landfill.

  7. State DEP Studies • Numerous studies from the late 1980s to 2005. • 500+ soil samples. • 100+ sediment samples. • Hundreds of surface water samples. • Thousands of groundwater samples from 120+ monitoring wells.

  8. State DEP Studies Result Contaminants identified to date with the most frequency by media include; • Soil: chromium, trimethylpentenes, Opex, Kempore, BEHP, NDPA, calcium, sulfate, sodium and ammonia • Sediment: chromium and BEHP • Surface Water: chromium, aluminum, sulfate, ammonia and NDMA • Groundwater: chromium, aluminum, sulfate, trimethylpentenes, BEHP, NDPA and NDMA

  9. Completed Clean-ups • Removed manufactured wastes including tanks and drums. • Excavated sludge from former lagoons, pits, Lake Poly, and drainage ditches. • Capped the calcium sulfate landfill. • Constructed Plant B for product recovery. • Constructed slurry wall/temporary cap. • Created conservation area.

  10. Why More Studies • DEP studies focused on source areas. • Numerous data gaps (spatial and analytes). • Superfund is a “risk-based” clean-up program. • Must consider: • All impacted areas & media • All potential chemicals • Community acceptance • Remedial technologies • Enforcement/$

  11. EPA/PRP Settlement • Approved by EPA on June 28, 2007. • AOC: legal requirements. • RI/FS SOW: technical requirements. • 3 Potentially Responsible Parties (PRPs): • Olin Corporation(owned 1980 to current) • American Biltrite, Inc.(owned prior to 1968) • Stepan Company(owned 1968 to 1980) • Requires PRPs to perform the study. • Requires PRPs to pay for EPA oversight. • This is not an agreement to clean-up the Site.

  12. Key Superfund Reports • Interim Response Steps Work Plan(August 2007) • Proposal for Plant B, slurry wall/cap and DAPL pilot. • Focused Remedial Investigation Report (Oct. 2007) • Compilation of existing data, evaluations and risk assessments. • Semi-Annual Status Reports (4 completed to date) • Summary of data and evaluations each July/January. • **RI/FS Work Plan(August 2009) • Proposal for Superfund investigations.

  13. RI/FS Work Plan Components • Remedial Investigation ← • Comprehensive site characterization • Human health and ecological risk assessments • Feasibility Study • Evaluate remedial technologies • Compare alternatives • Proposed Cleanup Plan • Record of Decision • Remedial Design/Action

  14. Olin Site Current Study Area

  15. Target Analyte List 242 chemicals

  16. Soil Samples • Gaps – Analytical and spatial • Single event • 134 surface soil (0 – 1ft) • 77 borings for soil (1ft to rock) • Up to 242 analysis/sample • Locations selected based on existing data, facility layout, potential exposure areas and spatial coverage. • Completed in September

  17. Upper South Ditch Samples • Surface Water/Sediment Samples • Gaps – Age of data and analytical • High and low flow events • Three areas of study • On-property • Upper South Ditch • Maple Meadow Brook • MMB and Sawmill • Nearby drainage areas • West Ditch • East Ditch/New Boston • North Pond • Landfill Brook • 24 sample locations/pairs • Temperature profiling • Up to 242 analysis/sample 5 sample locations

  18. East and West Ditch Drainage Areas 8 sample locations + Pending North Pond 11 sample locations Maple Meadow Brook Drainage Area

  19. Groundwater Samples • Private wells • Gaps – Plume edges and analytical • 207 existing monitoring wells • 15 – 20 new wells to be installed • Two sampling events planned • 189 samples in the 1st event • Up to 242 analysis/sample Pre-Superfund plume

  20. Private Wells • Two areas with wells • MMB/Butters Row Road • Cook/Burnham/Border • Sampled in Fall 2008 • Total of 11 wells • NDMA detected in two wells on Cook Ave. in the low part per trillion range • No unacceptable risk • No restrictions on use • Continue active testing • Take action if levels rise • New monitoring well

  21. NDMA in Groundwater • N-nitrosodimethylamine • Class B2 carcinogen • Most common use was rocket fuel • Byproduct of chlorination • At Olin, byproduct formed in the aquifer from chemicals such as hydrazine and formaldehyde • EPA priority pollutant and emerging contaminant of concern • No federal or state standards • Not common in Superfund • Toxic in the part per trillion range • Detected in town wells in 2003 • Most toxic and mobile compound

  22. Pooled in 4 valleys Estimated to be 25 million gallons Pending pilot pump test Dense Aqueous-Phase Liquid (DAPL)

  23. Other Activities • Plant B continues to operate • Monitoring of the slurry wall/containment area continues • Status reports to EPA twice a year

  24. Schedule • Soil sampling is done. • Surface water and sediment sampling this fall and spring 2010. • New wells installed this fall. Groundwater testing in the spring and fall 2010. • Data evaluations, risk assessments and supplemental field work into 2011. • Proposed cleanup plans in 2012 and/or 2013.

  25. WILMINGTON ENVIRONMENTAL RESTORATION COMMITTEE(WERC)

  26. Community Involvement • Informational meetings and fact sheets • Public hearings on proposed plans • Wilmington Town officials - Geoinsight • Wilmington Environmental Restoration Committee – WERC – Cambridge Environmental • EPA web – www.epa.gov/region1/superfund/sites/olin • Contacts: • Sarah White (EPA Community Relations Coordinator) (617) 918-1026 white.sarah@epa.gov • Jim DiLorenzo (EPA Project Manager) (617) 918-1247 dilorenzo.jim@epa.gov • Joe Coyne (MassDEP Project Manager) (617) 348-4066 Joseph.Coyne@state.ma.us

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