Anacostia Watershed Tidal River Toxic Remediation Update 4/30/14. polychlorinated biphenyls (PCBs), polycyclic aromatic hydrocarbons (PAHs), lead,

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1 1. Kenilworth Park Landfill Anacostia Watershed Tidal River Toxic Remediation Update 4/30/14 Contaminants: and methane gas polychlorinated biphenyls (PCBs), polycyclic aromatic hydrocarbons (PAHs), lead, None Emily Ferguson, National Park Service Greg Nottingham, National Park Service, 2004 Administrative transfer of Kenilworth North to the District of Columbia (District or DC) (transfer still pending) Feasibility Study completed April Proposed plan and public comment period completed (March May 2013). Preferred Alternative was 3b a 24 inch low permeability cap. Placement of a 24 inch soil cap (6 inches topsoil). Additional perimeter methane to be monitoring for 3 years. Complete the Groundwater investigation. After careful review of the data, determine the next steps toward issuance of a Record of Decision. 2. Pepco Benning Road Contaminants: polychlorinated biphenyls (PCBs), polycyclic aromatic hydrocarbons (PAHs) December 2011, DDOE negotiated a Consent Decree with Pepco to conduct a Remedial Investigation and Feasibility Study (RI/FS) of the Pepco Benning facility and the adjacent portion of the Anacostia River. benning road facility plans and deliverables Contact(s): Apurva Patil, DC Department of the Environment (apurva.patil@dc.gov) The Consent Decree required, Pepco to conduct RI/FS to characterize environmental conditions at Pepco Benning facility, investigate whether and to what extent past or current conditions at the site have caused or contributed to contamination of the River, assess current and potential risk to human health and the environment posed by conditions within the study area (landside and waterside) and to develop and evaluate cleanup options.

2 Landside field work including surface soil sampling, subsurface soil sampling, storm drain sampling and geotechnical soil borings was completed in October In April 2014, DDOE approved RI Addendum scope for installation of monitoring wells. Most waterside field work completed (bathymetric and utility survey, surface water samples, surface sediment samples, subsurface sediment samples), November The field work associated with monitoring well installations began in May 2014 and groundwater sampling will be completed in June Record of Decision is expected in late The schedule calls for submitting the draft Remedial Investigation (RI) report within 120 days of field work completion. The draft Feasibility Study (FS) report is due within 180 days from the day of completing RI field work. 3. CSX Transportation (Benning Road Rail Yard): Contaminants: Petroleum Products On February 1, 2011, DDOE and CSX Transportation signed a consent decree that requires CSXT to conduct a site wide investigation and natural resource damage assessment; and clean up pollutants on or emanating from its Benning Road rail yard. Hard copies of the reports are available for review at DDOE office. Contact(s): Apurva Patil, DC Department of the Environment (apurva.patil@dc.gov) The landside investigation in the vicinity of the Yard office completed in The corrective action plan for the yard office area for cleaning up the hydrocarbon contaminated soil and groundwater was approved by DDOE in April, The corrective action plan includes excavation of contaminated soil to approximately 5 10 feet below grade. Implementation of corrective action plan will begin upon approval from DDOT, related to the close proximity of the Anacostia Freeway. Conduct Natural Resource Damage assessment 4. Washington Gas Light: Contaminants: Manufactured Gas Waste, PAHs, volatile organic compounds (especially benzene) (VOCs), cyanide, and heavy metals

3 2008 Finding or Suitability for Early Transfer (FOSET) between NPS and the District; 2008 Site Specific Memorandum of Agreement (SSMOA) between NPS and DC governing transfer, and setting forth procedures for re evaluation of NPS ROD and implementation of remediation action; 2012 Consent Decree and Statement of Work between NPS, DC, and Washington Gas gas light settlement documents Emily Ferguson, National Park Service, Greg Nottingham, National Park Service, 1976 WGL begins to pump, capture, and treat contaminated ground water (ongoing) site (south of Water Street) transferred to the District of Columbia Consent Decree between NPS, DC, and Washington Gas Finalizing a Site wide Community Involvement Plan. Washington Gas is responsible for excavating up to 3 feet of surface and subsurface soil and backfill with clean soil on DC property (south of Water Street), beginning summer Currently developing the RI/FS Work Plan for contaminated Anacostia River sediments, waters, and groundwater. 5. Navy Yard (Operable Units 1 2): Contaminants: polychlorinated biphenyls (PCBs), polycyclic aromatic hydrocarbons (PAHs), metals, and others 1998 Barry Farm Residents Council U.S. consent decree; 1999 CERCLA 120 Federal Facility Agreement; Final Documents are available at the District of Columbia Public Library, Southeast Branch Library, th Street, SE, Washington, D.C Carolyn Barley, DC Department of the Environment (carolyn.barley@dc.gov), Bob Stroud, EPA Region III (Stroud.Robert@epa.gov) Between 1996 and 2001 the Navy, EPA, and DDOE inspected, cleaned out, relined, replaced, or abandoned all 20,000 linear feet of the storm sewer system at the WNY, which eliminated a pathway of contaminants to the Anacostia River. Navy initiated a basewide groundwater (Operable Unit 1) RI in 1999, and submitted a draft RI report in Navy recently completed additional groundwater investigations to support a final OU1 RI; the revised RI report is scheduled to be submitted to DDOE and EPA in August 2014.

4 Navy began investigating near shore Anacostia river sediments at the WNY (Operable Unit 2) in Sediment sampling events took place in 1999, 2006, and 2009, and a comprehensive draft RI report was produced in The OU2 RI report was reviewed by DDOE and EPA, and finalized in February The RI data have been uploaded to the NOAA Anacostia Watershed Database. The Navy met with DDOE and EPA in January 2014 to begin planning the Feasibility Study (FS) for OU2, including a plan to address several data gaps. Navy submitted an outline of the proposed sampling and analysis plan for the FS data gaps investigation to DDOE and EPA on March 3, 2014, and met with DDOE and EPA on March 19, 2014 to discuss DDOE and EPA comments on the Navy s approach. The Navy, EPA, and DDOE continue to work together as a Partnering Team on the investigation and cleanup activities at WNY, and meet monthly to discuss investigation activities, analytical results, and deliverables. The Navy plans to submit the revised OU1 RI report to DDOE and EPA for review in August The Navy, with input from DDOE and EPA, is preparing a sampling and analysis plan for the OU2 FS data gaps investigation, and plans to submit the document to DDOE and EPA for review in August Pending the finalization of the sampling and analysis plan, the Navy plans to conduct additional Anacostia River sediment sampling in early 2015, and to submit a Feasibility Study to DDOE and EPA for review in late Southeast Federal Center/The Yards Contaminants: PAHs, metals, PCBs, and others 1998 Barry Farm Residents Council U.S. consent decree; 1999 RCRA 3013 order issued by EPA to GSA. Barbara Smith, EPA RCRA Corrective Action Under a 1999 EPA Administrative Order, GSA completed a RCRA Facility Investigation (RFI) of the facility (site wide, including sediment). Under the Consent Decree, GSA cleaned out contaminated sediment (PCBs, etc.) from storm sewers, and replaced old timber pier with concrete pier. More intensive assessment and contaminant abatement has been completed on parcel by parcel basis, prior to development, including excavation and removal of petroleum, PCB and metalcontaminated soil on many parcels. Groundwater is being treated to remove gasoline components around the US DOT HQ building Human Health Risk Assessment includes screening level assessment of risks to humans from eating fish contaminated by sediment, with caveats regarding DC restrictions on fish consumption.

5 Forest City Washington continues to clean up and develop parcels at The Yards. EPA is evaluating the WNY OU 2 RI Report (2011) regarding sediments off shore. GSA sediment data was used in the human health and ecological risk assessment. The contaminated sediment of concern remains the O Street outfall, located off site and down river of GSA, which is currently capped. 7. Poplar Point: Contaminants: metals, pesticides, semi volatile organic compounds (SVOCs), VOCs, petroleum hydrocarbons, and PCBs 2008 Administrative Settlement Agreement and Order on Consent Governing the conduct of the Remedial Investigation and feasibility Study at the Poplar Point Site Emily Ferguson, National Park Service, (emily_ferguson@nps.gov); Greg Nottingham, National Park Service, (Greg_Nottingham@nps.gov) 2006 Congress enacted the DC Lands Act directing the United States to transfer the Site to the District of Columbia (transfer still pending) 2013 Conceptual Remedial Investigation Scoping Document for Poplar Point Community Involvement Plan expected Spring NPS will publish the availability of the Administrative Record Spring The RI field investigation will begin this summer.

6 Tidal River Toxic Remediation Update* Legend 7 1 Kenilworth 3 CSXT 2 PEPCO 4 Washington Gas 6 Federal Triangle 5 7 Navy Yard Poplar Point *Based on DDOE's Anacostia River 2032 Update (

7 To: Jon Capacasa, Director, Water Protection Division, EPA Region III Dana Minerva, Executive Director, Metro. Wash. Council of Governments From: Frank Fritz & Cindy Weiss, Assistant Regional Counsels, EPA Region III Date: October 21, 2009 Re: Anacostia River: Summary of Six Possible Sources of Sediment Contamination Washington Navy Yard Dept. of Defense (DoD) CERCLA lead agency (land): Dept. of Navy (DoN) Entity performing cleanup: DoN 1998 Barry Farm Residents Council-U.S. consent decree; 1999 CERCLA 120 Federal Facility Agreement Contam. linked to sediment: PCBs and others Status: On the NPL. Several removals completed, including removing PCB-contaminated sediment from storm sewers and excavating PCB-, petroleum- and leadcontaminated soil from several sites. Remedial investigation/feasibility study (RI/FS) ongoing. First round sediment sampling done. Second round sampling (sediment and fish tissue) finished Sept Southeast Federal Center/The Yards Partly GSA, partly private developer CERCLA lead agency (land): no CERCLA actions planned at this point Entity performing cleanup: GSA and other entities on certain parcels Other PRPs: Navy 1998 Barry Farm Residents Council-U.S. consent decree; 1999 RCRA 3013 order issued by EPA to GSA. Contam. linked to sediment: PAHs, metals, PCBs, and others Status: GSA cleaned out contaminated sediment (PCBs, etc.) from storm sewers, and replaced old timber pier with concrete pier. RCRA Facility Investigation (site-wide, including sediment) completed. More intensive assessment and contaminant abatement has been completed on parcel-by-parcel basis, prior to development, including excavation and removal of petroleum-, PCB- and metal-contaminated soil on many parcels Human Health Risk Assessment includes screening level assessment of risks to humans from eating fish contaminated by sediment, with caveats regarding DC restrictions on fish consumption. Poplar Point National Park Service (NPS) (land transfer to DC pending) CERCLA lead agency (land): unclear Entity performing cleanup: DC Other PRPs: Navy, Architect of the Capitol, Army Corps of Engineers, NPS NPS-DC order for DC to conduct RI/FS Contam. linked to sediment: PCBs, PAHs Status: DC implementing RI/FS, including investigation of sediment along shore and at Stickfoot sewer outfall. Georgetown Law Center notified U.S. and DC of intent to file RCRA citizen suit. Page 1 of 2

8 Washington Gas Light (WGL) WGL owns East Station parcel. DC owns former NPS parcel adjacent to water. CERCLA lead agency (land): DC Entity performing cleanup: WGL 2000 DC-WGL East Station Letter Agreement (pump, capture, treat contaminated ground water); 2006 draft NPS- Washington Gas-DC consent decree to implement 2006 NPS Record of Decision; Site Specific Memorandum of Agreement between NPS and DC governing transfer, and setting forth procedures for re-evaluation of NPS ROD and implementation of remediation action Contam. linked to sediment: PAHs, metals Status: WGL continues to pump and treat groundwater to prevent coal tar contamination from migrating to the river. NPS performed RI/FS of NPS/DC property and issued ROD in Draft NPS-WGL consent decree to implement ROD not finalized due to transfer of property from NPS to DC. In 2009, WGL voluntarily submitted work plans to sample sediment. EPA, NPS and DC commented; WGL is preparing a response. PEPCO Benning Road PEPCO Entity performing cleanup: PEPCO none known to the authors Contam. linked to sediment: PCBs, PAHs Status: EPA finished CERCLA preliminary assessment in EPA sampled soil, sediment as part of CERCLA site investigation in fall EPA is currently evaluating data and response options. Kenilworth Landfill (former DC dump) NPS CERCLA lead agency (land): NPS Entity performing cleanup: NPS none known to the authors Contam. linked to sediment: Fill materials had PCBs, PAHs, metals Status: NPS conducted RI/FS in 2002, proposed cap. EPA recommended excavation of waste material between landfill and aquatic habitat, wetland, restoring riparian habitat, forested buffer, and low impact development technologies. NPS installed riprap to prevent erosion. Notes: This summary focuses on the status of environmental investigation and cleanup related to contaminated sediment hotspots in the Anacostia River. It lists some of the main contaminants at each facility that may have migrated to sediment hotspots. No attempt is made to list all contaminants in sediment or on land. Page 2 of 2