FFA Final

Record of Decision for Site 10

Washington Navy Yard Washington, D.C.

Naval Facilities Engineering Command Washington

United States Environmental Protection Agency Region III

District of Columbia Department of the Environment

May 2009 Contents

Acronyms and Abbreviations ...... v 1 Declaration...... 1-1 1.1 Site Name and Location ...... 1-1 1.2 Statement of Basis and Purpose...... 1-1 1.3 Description of the Selected Remedy...... 1-1 1.4 Statutory Determinations...... 1-2 1.5 Authorizing Signature...... 1-2 2 Decision Summary ...... 2-1 2.1 Site Name, Location, and Brief Description ...... 2-1 2.2 Site History, Previous Investigations, and Enforcement Activities...... 2-1 2.2.1 Site History ...... 2-1 2.2.2 Previous Investigations...... 2-2 2.2.3 Enforcement Activities...... 2-4 2.3 Community Participation ...... 2-4 2.4 Scope and Role of the Response Action...... 2-5 2.5 Site Characteristics...... 2-5 2.5.1 Site Overview ...... 2-5 2.5.2 Physical Setting ...... 2-5 2.5.3 Ecology ...... 2-6 2.5.4 Conceptual Site Model ...... 2-6 2.5.5 Nature and Extent of Contamination...... 2-6 2.6 Current and Potential Future Land and Resource Uses...... 2-7 2.7 Summary of Risks ...... 2-7 2.7.1 Human Health Risk Assessment Process...... 2-8 2.7.2 Human Health Risk Assessment Results – Before Removal Action...... 2-9 2.7.3 Human Health Risk Assessment Results – After Removal Action...... 2-11 2.7.4 Ecological Risk Assessment Process...... 2-11 2.7.5 Ecological Risk Assessment Results – Before Removal Action ...... 2-12 2.7.6 Ecological Risk Assessment Results – After Removal Action ...... 2-13 2.8 Selected Remedy ...... 2-14 2.9 Documentation of Significant Changes ...... 2-14 3 Responsiveness Summary ...... 3-1 3.1 Overview...... 3-1 3.2 Background on Community Involvement ...... 3-1 3.3 Summary of Comments Received During the Public Comment Period, Navy Responses...... 3-1 4 References ...... 4-1

090540001WDC III FINAL-RECORD OF DECISION FOR SITE 10

Tables 2-1 Summary of RME Cancer Risks and Hazard Indices 2-2 Summary of CT Hazard Indices 2-3 Surface Soil Lead Model Results 2-4 Site 10 - ERA Step 3 Surface Soil Screening for Lead for Lower Trophic Level Receptors 2-5 Site 10 Quarters A - ERA Step 3 Surface Soil Screening for Lower Trophic Level Receptors 2-6 Site 10 Lawn Areas - ERA Step 3 Surface Soil Screening for Lower Trophic Level Receptors 2-7 Site 10 Garden Areas - ERA Step 3 Surface Soil Screening for Lower Trophic Level Receptors 2-8 Site 10 Spigot Areas - ERA Step 3 Surface Soil Screening for Lower Trophic Level Receptors 2-9 Summary of Hazard Quotients for Food Web Exposures For Site 10 2-10 Summary of Ecological Risk Assessment Step 3 COCs Figures 2-1 Washington Navy Yard Location Map 2-2 Washington Navy Yard Site Plan 2-3 Extent of Removal Actions for Site 10 2-4 Conceptual Site Model for Potential Human Exposure 2-5 Conceptual Site Model for Potential Ecological Exposure Appendixes A DDOE Letter of Concurrence B Site 10 Removal Action Confirmatory Soil Results C Public Meeting Transcript—September 10, 2008

IV 090540001WDC Acronyms and Abbreviations

CERCLA Comprehensive Environmental Response, Compensation, and Liability Act CERCLIS ID Comprehensive Environmental Response, Compensation, and Liability Act Information System Identification COPC constituent of potential concern CSF cancer slope factor CTE central tendency exposure CSM conceptual site model DDOE District of Columbia Department of the Environment EPA United States Environmental Protection Agency EPC exposure point concentration ERA Ecological Risk Assessment FFA Federal Facilities Agreement FS Feasibility Study HEAST Health Effects Assessment Summary Tables HHRA human health risk assessment HI hazard index HQ hazard quotient IC Institutional Control IEUBK Integrated Exposure Uptake Biokinetic Model IR Installation Restoration IRIS Integrated Risk Information System LOAEL lowest observed adverse effect level Navy United States Department of the Navy NCP National Oil and Hazardous Substances Pollution Contingency Plan NOAEL no observed adverse effect level NPL National Priorities List PA Preliminary Assessment ppm parts per million RAB Restoration Advisory Board RBC risk-based concentration RCRA Resource Conservation and Recovery Act RfD reference dose RFI RCRA Facility Investigation RI Remedial Investigation RME reasonable maximum exposure ROD Record of Decision

090540001WDC V FINAL-RECORD OF DECISION FOR SITE 10

SARA Superfund Amendments and Reauthorization Act SEFC Southeast Federal Center SERA Screening Ecological Risk Assessment SSA 12 Site Screening Area 12 SVOC semi-volatile organic compound UCL upper confidence limit VOC volatile organic compound WNY Washington Navy Yard

VI 090540001WDC SECTION 1 Declaration

1.1 Site Name and Location This Record of Decision (ROD) was prepared for the soil at Site 10 at the Washington Navy Yard (WNY) in Washington, D.C. By definition, this site consists solely of soil; basewide groundwater is addressed as a separate operable unit. The Comprehensive Environmental Response, Compensation, and Liability Act Information System identification (CERCLIS ID) number for the WNY is DC9170024310.

1.2 Statement of Basis and Purpose This ROD presents the basis for determining that further remedial action is not necessary for Site 10 at the WNY. The determination has been made in accordance with the Comprehensive Environmental Response, Compensation, and Liability Act of 1980 (CERCLA), as amended by the Superfund Amendments and Reauthorization Act of 1986 (SARA), and, to the extent practicable, the National Oil and Hazardous Substances Pollution Contingency Plan (NCP). In accordance with Section 113(k) of CERCLA, this decision is based on the Administrative Record file for the WNY. The United States Department of the Navy (Navy) and the United States Environmental Protection Agency (EPA) Region III jointly issue this ROD. The District of Columbia Department of the Environment (DDOE) concurs with the selected remedy (see Appendix A). Public comments that were received during the public meeting and 30-day comment period on the Proposed Plan for this site are discussed in Section 3, “Responsiveness Summary.”

1.3 Description of the Selected Remedy No further CERCLA remedial action is the selected remedy for the soil at Site 10. The no­ further-action remedy selection is based on the remedial investigations (including the baseline human health and ecological risk assessment), the subsequent non-time-critical removal action (NTCRA) of over 2,000 cubic yards of soil, and the results of 313 confirmatory soil samples. No further action under CERCLA is necessary to protect human health, welfare, or the environment from actual or threatened releases of hazardous substances into the environment from the soil at Site 10. Because this remedy will not result in hazardous substances, pollutants, or contaminants remaining on-site above levels that allow for unlimited use and unrestricted exposure, a five-year review will not be required. Site 10 is one of 18 sites at the WNY and is included in the Navy’s WNY Installation Restoration (IR) Program. RODs have already been signed for 11 of the 18 sites (Sites 1, 2, 3,

090540001WDC 1-1 FINAL·RECORD OF DECISiON FOR SITE 10

4,5,7,9,11,13,14, and 16). Separate investigations and assessments are being conducted at each of the olher 6 sites in accordance with CERCLA.

1.4 Statutory Determinations Site 10 is a soil site. While the risk assessment presented in this ROD evaluates risks from all constituents found in the soil, the consideration for remedial action is based on risks from soil that might be related to site activities as opposed to risks that might be related to the fill soil used to create the WNY. Portions of Site 10 are situated on fill soil that was placed by the U.s. government over the last two centuries. Potential contamination inherent in fill material at the WNY is currently being evaluated as part of a separate investigation for Site Screening Area 12 (SSA 12). Remedial actions that might be required to address risks from contamination inherent in the fill material will be established under a separate ROD for WNY fill. Additionally, impacts to groundwater and potential risks from exposure to groundwater throughout the WNY are being addressed separately as Operable Unit 1. This ROD determines that no further remedial action is necessary for soil at Site 10 and that this remedy is protective of human health and the environment. This remedy will not result in hazardous substances, pollutants, or contaminants remaining at the site above levels that allow for unlimited use and unrestricted exposure; therefore, 5-year reviews will not be requiTed for this remedial action.

1.5 Authorizing Signature The Navy and EPA select this remedy with the concurrence of the DDOE. Concur and recommend for immediate implementation: ~ Z::3 eh.,...... Zq:?'7 Date

By Date

Kathryn A. Hodgkiss, Acting Director Hazardous Site Cleanup Division U.S. EPA Region III

1·2 090540001WDC SECTION 2 Decision Summary

2.1 Site Name, Location, and Brief Description This ROD presents the Navy’s selected remedial action for Site 10 at the WNY, located in southeastern Washington, D.C., along the Anacostia River (Figure 2-1). The Navy serves as the lead agency for environmental restoration at the WNY, in conjunction with EPA’s exercise of its remedy selection authority under Section 120 of CERCLA, 42 U.S.C. § 9620, and in consultation with the DDOE. The WNY (EPA ID No. DC9170024310) covers 63.3 acres in an urban setting. The WNY’s role throughout its two centuries of operation has been primarily ordnance production and research, but it also has included shipbuilding and repair, and heavy equipment manufacturing. After World War II, the WNY’s role shifted from manufacturing to administration. Currently, the WNY includes administrative, supply, and storage buildings; residences; training facilities; and museums. Buildings and other impervious surfaces cover approximately 95 percent of the WNY. The other 5 percent includes vegetated areas such as small parks, landscaped areas surrounding buildings, and yards of residential quarters for Navy officers and their families. A significant portion of the vegetated areas are associated with Site 10. Site 10 consists of four discontinuous areas (Figure 2-2). The largest area is located in the north-central portion of the WNY, and is commonly called Admiral’s Row. The site consists of 17 buildings, structures, and areas associated with Flag (admiral and captain) Housing and ceremonial uses. The buildings are currently used for residential purposes, except Building 1, which is used as administrative offices. The topography at Site 10 gradually slopes to the south toward the Anacostia River. The soil underlying the Site 10 area consists of non-native and man-made fill and naturally-deposited soil material. Approximately 35 percent of the ground surface is covered with pavement and buildings with most of the uncovered, grassy area focused in Leutze Park located west of Quarters B.

2.2 Site History, Previous Investigations, and Enforcement Activities

2.2.1 Site History Site 10 includes Quarters A through H, K through P, R through W, and Y; Building 1; Admiral Leutze Park; and the Latrobe Gate (Figure 2-2). Only four of the buildings (Quarters N, O, and U and Building 1) have been used for functions other than housing:

� Quarters N and O were built in 1866 originally as Paint Shop #1 and remodeled into living quarters around 1900.

090540001WDC 2-1 FINAL-RECORD OF DECISION FOR SITE 10

� Quarters U (Building 195) was constructed in 1937 as a training building, and shortly before World War II it was used as an experimental-ammunition building by the Naval Research Laboratory. From about 1946 to 1950, the building was used by the WNY transportation department and then converted into the WNY Naval Reserve Center. In 1965, the building was converted into officer quarters and redesignated “Quarters U”.

� Building 1 (also referred to as “Quarters J”) was constructed about 1840 to serve as the Commandant’s Office and was used as administrative offices (intelligence office, post office, communications office, and credit union office) until about 1948, when it was remodeled into multiple living quarters and called Quarters J. In the early 2000’s, it again underwent extensive remodeling and now serves as administrative offices. Investigations at the WNY have found some areas of lead-contaminated soil at Site 10. Past maintenance of these buildings with exterior lead-based paints and lead roofing materials is believed to be the source of lead contamination in soil. Before health hazards associated with lead were understood, lead was used in paint and many other products. Although the federal government banned lead-based paint from housing in 1978, many older homes still contain lead-based paint.

2.2.2 Previous Investigations A summary of the previous investigations performed at Site 10 are presented below.

1993 Preliminary Assessment In 1993, the Navy prepared a Preliminary Assessment (PA) report (Baker Environmental Inc., 1993) for the WNY. The 1993 PA used historical documents, personnel interviews, and consultation with the District and federal agencies to identify 16 areas of concern at the WNY requiring further study. Site 10 was one of the areas identified.

1996 Site Investigation In 1995, the Navy presented the results of the investigation of 13 sites and 2 areas of concern at WNY in the Site Investigation report (Baker Environmental, Inc., 1996) for the WNY. This report included results for the Site 10 area. The field investigation related to Site 10 included the collection of groundwater, surface soil, and subsurface soil. The results of the investigation revealed that the primary ways people could be exposed to contaminants at Site 10 were by ingesting (accidentally swallowing) surface soil or subsurface soil.

1998 Quarters A (Tingey House) Soil Investigation In 1998, soil sampling was conducted at Quarters A (Tingey House) to assess the presence of lead in surface soil (Navy, 1998). This sampling was performed as a precaution given the findings of lead in soil at other residential locations on the WNY (Site 10). Based on the results, Quarters A was added to Site 10.

1999 Facility-Wide Remedial Investigation As part of the 1999 Facility-Wide Remedial Investigation (RI) (CH2M HILL, 2000a,b), a Facility-Wide Hydrogeologic Investigation was performed for 9 sites, including Site 10. The purpose of the investigation at Site 10 was to evaluate the presence of lead in groundwater as a result of previous soil sampling performed at Site 10 that indicated the elevated

2-2 090540001WDC SECTION 2—DECISION SUMMARY presence of lead in soil. This investigation included soil and groundwater sampling. The results of the investigation did not indicate unacceptable levels of lead in the groundwater, but recommended additional groundwater sampling for various constituents detected in soil (benzo(a)pyrene, copper and manganese).

2002 Site 10 Phase II Investigation In 2002, a Phase II Investigation (CH2M HILL, 2002) was conducted at Site 10 that involved subsurface soil sampling to delineate the vertical extent of the lead concentrations in soil. The investigation characterized the vertical extent of lead in soil to a depth of 4 feet below ground surface. Several samples were also analyzed for other metals and pesticides in order to provide data to complete the human health risk assessment. The data collected in this investigation was compiled and reported in the 2004 Focused RI for Site 10.

2004 Focused Remedial Investigation In 2004, a Focused RI report (CH2M HILL, 2004) for Site 10 was completed. This report compiled all data collected to date at Site 10 and provided a full characterization of the nature and extent of soil contamination. The data compiled included analytical results from groundwater samples and from more than 550 soil samples collected between 1995 and 2004. These data were used to assess potential risk to people and the environment and to establish whether or not the site is a source of lead contamination to groundwater. A Feasibility Study (FS) was recommended based on the potential hazards associated with people and plants being exposed to lead in soil at the site. In lieu of conducting a FS, and as a conservative and protective measure, a series of non­ time-critical removal actions were recommended for all areas within Site 10 with surface soil concentrations of lead greater than 400 parts per million (ppm). This is the conservative screening value established by EPA to be protective of children in a residential setting.

2003-2008 Institutional Controls and Removal Actions Following the 2004 Focused RI, institutional controls (ICs) were put in place at Site 10 to reduce the chance people would be exposed to contaminants. These controls included restrictions on gardening by residents and training the WNY’s professional gardener how to safely handle dirt, grass clippings and other plant materials that could contain lead. These restrictions were communicated to the residents and workers who lived or worked at these quarters in 2004 through a fact sheet and an information session. Subsequent residents and workers were notified as they moved in or were hired. Between late 2003 and early 2008, a series of removal actions were completed at Site 10. The removal actions consisted of excavating soil to depths of between 1 and 4 feet where surface soil is exposed and lead levels exceeded 400 ppm, and replacing it with clean backfill. The history and background of the buildings at Site 10 indicate that the soils beneath patios, walkways, pavements or buildings would not have been impacted by lead-based paint maintenance activities. Therefore, soils beneath these areas were not disturbed. As the excavations progressed, sampling was used to verify that soil concentrations exceeding 400 ppm had been successfully removed or to recommend additional excavation. Approximately 2,175 cubic yards of soil were removed and disposed of at a landfill at a cost

090540001WDC 2-3 FINAL-RECORD OF DECISION FOR SITE 10 of approximately $5 million. The extent of excavations is shown in Figure 2-3. As each quarters, or group of quarters, were successfully remediated, ICs were removed. After completion of the non-time-critical soil removal actions at Site 10, no unacceptable human health or ecological risks were identified that require future action.

The Site 10 Removal Action Master Report (CH2M HILL, 2005) incorporates the results of the removal actions and the 313 confirmatory soil samples for Site 10. The results of these confirmatory soil-sampling activities indicated the soil throughout Site 10 was successfully remediated to concentrations less than 400 ppm. The confirmatory soil sample results for the Site 10 Removal Action are provided in Appendix B.

2.2.3 Enforcement Activities On July 16, 1997, the EPA and the Navy entered into a Consent Order to perform a Resource Conservation and Recovery Act (RCRA) Facility Investigation (RFI) at the WNY to determine the nature and extent of potential releases of hazardous wastes, solid wastes, and/or hazardous constituents at or from the WNY. The EPA’s jurisdiction to issue the Consent Order derived from authority vested in EPA by Section 7003 of RCRA, as amended by the Hazardous and Solid Waste Amendments of 1984. Pursuant to CERCLA authority, on March 6, 1998, the EPA proposed the WNY for listing on the Federal Facilities section of the National Priorities List (NPL) by publishing a proposed rule in the Federal Register (volume 63, number 44, pages 11,340–11,345). The Federal Register notice announced EPA’s public comment period for the proposed listing of the WNY (and several other sites) from March 6, 1998, through May 5, 1998. The WNY was added to the NPL through a final rule in the Federal Register on July 28, 1998 (volume 63, number 144, pages 40,182-40,188). An Interagency Agreement (Federal Facilities Agreement [FFA]) between EPA Region III, the District of Columbia, and the Navy was signed on June 30, 1999 (EPA, 1999). In accordance with Executive Order 12580 and the NCP, the Navy functions as the lead agency for the management and cleanup of the WNY IR Program sites under CERCLA. EPA, the Navy, and the DDOE work together as part of the WNY cleanup team. Effective September 27, 1999, the FFA superseded the July 16, 1997 RCRA Order.

2.3 Community Participation A Restoration Advisory Board (RAB) made up of community members, Navy, EPA, and District of Columbia representatives, meets several times each year. The RAB is designed as a forum for the exchange of information between WNY and the local community regarding IR activities. Reports from previous investigations and the Proposed Plan for Site 10 can be found in the Administrative Record file. Site 10-documents, including the Proposed Plan and the Site 10 Removal Action Master Report (CH2M HILL, 2005) were made available to the public for review during the 30-day public comment period, which was held from September 10 through October 10, 2008. These documents were placed in the public information repositories maintained at the following locations:

2-4 090540001WDC SECTION 2—DECISION SUMMARY

District of Columbia Public Library District of Columbia Public Library Southeast Branch Washington Highlands Branch 403 7th Street, SE 115 Atlantic Street, SW Washington, DC 20003 Washington, DC 20032 Phone: 202-698-3377 Phone: 202-645-5880 www.dclibrary.org www.dclibrary.org

The notice of the public comment period for Site 10 and the availability of the Proposed Plan and supporting documents was published in the Washington Post (D.C. Extra Weekly Edition) on August 28, 2008. A public meeting was held on September 10, 2008 at Building 212, 2nd floor conference room, at the WNY to present the Proposed Plan to a broader community audience than those who had already been involved at the site. A copy of the Proposed Plan Notice of Availability and the certified transcripts for the public meeting are provided in Appendix C. All public participation activities meet the requirements of CERCLA Sections 113(k)(2)(B)(i-v) and 117.

2.4 Scope and Role of the Response Action Site 10 is one of 18 current IR Program sites at the WNY. As a result of the previously undertaken non-time-critical removal actions, no further action is necessary for the soil at this site to protect human health and the environment. This ROD considers soil only at Site 10; groundwater at the WNY is currently being evaluated as Operable Unit 1 under separate investigative documents. Separate investigations and assessments are being conducted for the other IR sites at WNY in accordance with CERCLA, as presented in the WNY Site Management Plan (CH2M HILL, 2008). Separate RODs and other CERCLA decision documents will be prepared for the other IR sites. RODs for 11 of these sites have already been completed and signed (Sites 1, 2, 3, 4, 5, 7, 9, 11, 13, 14, and 16).

2.5 Site Characteristics

2.5.1 Site Overview The WNY covers 63.3 acres and borders the Anacostia River in southeastern Washington, D.C. as shown in Figure 2-2. Commercial properties along M Street border the facility on the north, commercial properties and a former industrial area along 11th Street on the east, the Southeast Federal Center (SEFC) on the west, and the Anacostia River on the south.

2.5.2 Physical Setting As discussed in Section 2.1, the WNY is heavily developed with buildings and other impervious surfaces, resulting in little vegetated land. The topography at Site 10 generally slopes to the south toward the Anacostia River. The land slopes generally from north to south with ground surface elevation approximately 50 to 55 ft above mean sea level in the facility’s northeastern part to less than 10 along the bulkhead adjacent to the Anacostia River (CH2M HILL, 2004). The WNY is constructed partially on land reclaimed from what was formerly the channel and floodplain of the Anacostia River. Since the late 1700s, the WNY has expanded southward through a series of shoreline expansions. The soil underlying WNY consists of

090540001WDC 2-5 FINAL-RECORD OF DECISION FOR SITE 10 fill material and naturally-deposited soils. The fill is generally thickest near the river, and thins progressing north through the WNY. The general direction of groundwater flow at the WNY is south toward the Anacostia River. Further discussion of the physical setting and regional geology of the WNY is presented in the Focused RI report (CH2M HILL, 2004).

2.5.3 Ecology Approximately 95 percent of the WNY is covered with buildings or other impervious surfaces. The urbanized area near WNY contains minimal vegetation cover. Vegetation in the area primarily consists of planted street trees (American elm, red maple, and pin oak), ornamental shrubs and flowers, and grass in the park areas. (Approximately 35 percent of the ground surface at Site 10 is covered predominately by pavement and buildings, with most of the uncovered, grassy area focused in Leutze Park. Wildlife present in the surrounding area is limited to species that thrive in and around urban areas. Birds include pigeons and doves (Family Columbidae), European starlings (Sturnus vulgaris), house sparrows (Passer domesticus), and gulls (Family Laridae) from the adjacent river. Mammals include mice, rats, gray squirrels (Sciurus carolinensis), raccoons (Procyon lotor), and feral dogs and cats. Due to the paucity of natural habitat at Site 10, little use of Site 10 by fauna is expected.

2.5.4 Conceptual Site Model The conceptual site models (CSM) for the human health risk assessment (HHRA) and ecological risk assessment (ERA) integrates information regarding the physical characteristics of the site, potentially exposed populations, sources of contamination, and contamination mobility (fate and transport) to identify exposure routes and receptors evaluated in the risk assessment for surface and subsurface soil. A well-defined CSM allows for a better understanding of the complete exposure routes and pathways (and therefore the potential risks) at a site and aids in the identification of the potential need for remediation. Human receptors under the current and future land use scenarios at Site 10 include industrial workers (WNY employees), construction workers (workers who may dig in the soil), recreational users (both adults and adolescents who visit the WNY), and current and future residents (both adults and children). Ecological receptors evaluated at Site 10 included invertebrates, plants, insectivorous birds, carnivorous birds, and herbivorous mammals. Refer to Figures 2-4 and 2-5 respectively for the Site 10 conceptual site models for human health and ecological risk exposure.

2.5.5 Nature and Extent of Contamination The following conclusions regarding nature and extent of contamination at Site 10 were made based on the results of the more than 550 soil samples collected as part of the 2002 Site 10 Phase II Investigation (CH2M HILL, 2002) and the 2004 Focused RI (CH2M HILL, 2004):

2-6 090540001WDC SECTION 2—DECISION SUMMARY

� Lead was found in the surface and subsurface soil at concentrations above the 400 mg/kg screening level in many locations across Site 10.

� Chromium was detected in surface soil, and copper and manganese were detected in subsurface soil, at concentrations above the adjusted EPA Region III residential risk­ based concentrations (RBCs) and were statistically greater than their respective soil background populations. The exceedances of the adjusted residential RBC for copper were localized to Quarters B only, whereas exceedances of the adjusted residential RBC for chromium and manganese were found at several different areas of Site 10.

� While arsenic concentrations in soil exceeded the adjusted residential RBC at many locations, the arsenic concentrations were consistent with background soil concentrations.

� Dieldrin (a pesticide) was detected in surface and subsurface soil at concentrations above the adjusted EPA Region III residential RBC. The exceedances for dieldrin were localized to the soil on the east side of Quarters A.

� One semi-volatile organic compound (SVOC), benzo(a)pyrene, was detected above soil screening criteria at Site 10 at 2 of 12 sample locations. Both locations were in the vicinity of Quarters B

� No volatile organic compounds (VOCs) were detected above screening criteria in Site 10 soil.

2.6 Current and Potential Future Land and Resource Uses Currently, WNY includes administrative, supply, and storage buildings; residences; training facilities; and museums. Buildings and other impervious surfaces cover approximately 95 percent of the area surfaces. Leutze Park, in the facility’s north-central portion, is the only substantial vegetated area in this largely urban setting. Approximately 35 percent of the ground surface at Site 10 is covered with pavement and buildings with most of the uncovered, grassy area focused in Leutze Park. The buildings and grounds that make up Site 10 are currently used for residences (quarters) for Navy officers and their families, except Building 1 (administrative offices) and Leutze Park, which is a manicured grass park used for ceremonies. The potential future exposure scenarios evaluated in the HHRA and ERA for Site 10 addressed by this ROD conservatively assume that the sites will continue to be used for residential purposes, and that the subsurface soil may be excavated at some point in time and become surface soil so that there is a complete exposure pathway with future residents.

2.7 Summary of Risks Human health and ecological risk assessments were conducted for Site 10 prior to the soil removal action to evaluate potential risks to human and ecological receptors. The results of these risk assessments provided the basis for conducting the removal action.

090540001WDC 2-7 FINAL-RECORD OF DECISION FOR SITE 10

2.7.1 Human Health Risk Assessment Process A baseline HHRA was conducted as part of the Focused RI report for Site 10 (CH2M HILL, 2004) in accordance with EPA requirements in effect at the time. The purpose was to characterize current and future potential human health risks for soil at Site 10 under conditions that existed prior to soil removal action. Because the subsequent removal action cleaned up the site soil to concentrations below the 400 mg/kg screening value for lead and removed the soil where several other constituents posed potentially unacceptable risks, no post-removal action risk assessment was deemed to be warranted. Conservative scenarios were used to maximize protection of human health. A detailed discussion of the human health risk assessment methodology and results for Site 10 is presented in the Focused RI report for Site 10 (CH2M HILL, 2004). A brief overview of the process and a summary of the results are discussed below. The baseline HHRA process consisted of the following components and used the noted general parameters and assumptions:

� Identification of Constituents of Potential Concern (COPCs)—identifies and characterizes the distribution of COPCs found on site. Constituents identified in this screening were the focus of the subsequent evaluation in the risk assessment. To select the COPCs (with the exception of lead), maximum detected concentrations were compared to the EPA Region III adjusted RBCs in effect at the time the first draft of the Focused RI was prepared. During finalization of the Focused RI, the screening values were compared to the then-current EPA Region III RBCs (October 2003) to see if any changes would result in changes to the COPCs, which they did not. To determine if lead is a COPC, the average concentration of lead for an area was compared to the EPA screening level of 400 mg/kg. Following EPA guidance, background soil data were not used in the COPC screening. Therefore, constituents that were retained as COPCs and quantitatively evaluated in the risk assessment may be associated with background conditions at WNY, and may not be site-related. Background data were considered during risk management decisions.

� Exposure Assessment— identifies potential pathways by which exposure could occur, characterizes the potentially exposed populations (e.g., workers, residents, trespassers), and estimates the magnitude, frequency, and duration of exposures.

� Toxicity Assessment—identifies the types of adverse health effects associated with exposure to COPCs along with available toxicity factors (e.g., cancer slope factors and reference dose values) and summarizes the relationship between magnitude of exposure and occurrence of adverse health effects. It also identifies related uncertainties (such as the weight-of-evidence of a particular chemical’s carcinogenicity in humans) associated with these values.

� Risk Characterization— integrates the results of the exposure assessment and toxicity assessment to estimate the potential risks to human health. Both cancer and noncancer human health effects are evaluated. Pathways that may carry contaminants which pose an unacceptable risk based on quantitative risk characterization are investigated.

2-8 090540001WDC SECTION 2—DECISION SUMMARY

� Uncertainty Assessment—identifies sources of uncertainty associated with the data, methodology, and the values used in the risk assessment estimation, including the consideration of background concentrations of naturally-occurring or anthropogenic sources of metals and organic compounds.

� Risk Management—evaluates the results of the risk assessment in consideration of background conditions at WNY. WNY base-wide background soil conditions were established by collecting data from a mutually agreed-upon set of offsite and onsite sampling locations. The background data set was further refined by eliminating certain results that were deemed to be outliers. A statistical evaluation of the site data to background data was performed to determine if the risk drivers are associated with background conditions and not necessarily site-related. The background data and statistical evaluation are included in Appendix F of the Focused RI (CH2M HILL, 2004).

2.7.2 Human Health Risk Assessment Results – Before Removal Action A separate baseline risk assessment was conducted for the soil around each of the quarters and non-residential buildings (exposure areas) that make up Site 10. The purpose was to evaluate the potential human health risks associated with exposure to site-related:

� Surface soil, and � Subsurface soil. Potential risks were calculated for the following potentially complete exposure scenarios at each exposure area:

� Current/future adult industrial worker, � Current/future adult gardener, � Current/future adult and child recreational person, � Current/future adult and child resident, and � Future adult construction worker. The COPCs that failed risk screening varied from exposure area to exposure area. The following COPCs were identified as COPCs for one or more of the exposure areas: aluminum, arsenic, chromium, iron, lead, manganese, thallium, vanadium, and dieldrin in the surface soil; and aluminum, arsenic, chromium, copper, iron, manganese, thallium, vanadium, benzo(a)pyrene, and dieldrin in the subsurface soil. No COPCs were retained for Quarters P, S, T, W, Y, U, V, Leutze Park, or Building 1 and, therefore, they were not included in the summarized exposure routes. For each of the other exposure areas (Quarters A, B, C, D, E, F, G, H, LM, M1, N, O, and R), carcinogenic and noncarcinogenic risks were calculated for each potential receptor population using the reasonable maximum exposure (RME) scenario. A summary of the results is shown in Table 2-1 for the RME risk estimates. In instances where the cumulative RME hazards exceeded the EPA target level of one, or if the carcinogenic risk exceeded 1X10-4, the central tendency exposure (CTE) scenario risk estimates were calculated. A summary of the results is shown in Table 2-2 for the CTE risk estimates. Lead exposure and uptake is measured differently than for other constituents. Lead is regulated by EPA based on the concentration of lead in blood. The potential blood-lead

090540001WDC 2-9 FINAL-RECORD OF DECISION FOR SITE 10 concentration for residents is estimated by using the physiologically-based pharmacokinetic, Integrated Exposure Uptake Biokinetic Model (IEUBK). Risks associated with nonresidential adult (industrial worker) exposure to lead were evaluated based on Recommendations of the Technical Review Workgroup for Lead for an Interim Approach to Assessing Risks Associated with Adult Exposure to Lead in Soil, (EPA, 1996). This approach uses a methodology to relate soil lead intake to blood lead concentrations in women of child­ bearing age. The methodology focuses on estimating fetal blood lead concentration in women exposed to lead contaminated soils. Exposure to lead was evaluated for the areas where the average lead concentration exceeded the lead screening level of 400 mg/kg. The IEUBK model was used to qualitatively evaluate the potential risks to children living at the site. The adult lead model was used to evaluate the risks associated with exposure to lead in soil for the site worker. The EPA considers lead in soil not to be a health concern if the model predicts that less than 5 percent of the population will have a blood-lead level greater than 10 �g/dL. Table 2-3 summarizes the results of the IEUBK and adult lead models. The RME carcinogenic and noncarcinogenic risks and risks related to lead exposure, calculated for the following exposure scenarios, were all within EPA acceptable risks.

� Current/future adult gardener, � Current/future adult resident, and � Future adult construction worker. The HHRA determined that, prior to the removal action, the primary unacceptable risks at Site 10 were from lead in the soil. Exposure to lead in surface soil at Quarters B, C, D, E, G, L, M, M1, O, and R could result in blood lead levels in residential children above EPA’s acceptable risk levels. Exposure to lead in surface soil at Quarters D, G, M1, and O could result in blood lead levels in fetuses of adult workers above EPA’s target levels. Exposure to soil at Quarters F, H, N, P, S, T, W, Y, U, V, Building 1, and Leutze Park would not result in risks or blood lead levels above EPA’s acceptable risk levels when considering average lead concentrations in soil for each area. In addition to the lead-related risks, several other risks were identified as being related to the non-lead COPCs in the soil at Quarters A, B, D, and O. The risks calculated for the following exposure scenarios for these quarters exceeded EPA acceptable risk levels:

� Adult Industrial Workers at Quarters A: The noncarcinogenic hazard associated with exposure of an industrial worker to the combined surface and subsurface soil at Quarters A (2.4) was above EPA’s target hazard index of 1.0. However, there were no individual constituents or individual hazards by target organ with a hazard above 1.0.

� Child Residents at Quarters A, B, D, and O: The noncarcinogenic hazard associated with exposure of a child resident to the combined surface and subsurface soil at Quarters A, B, D, and O were above EPA’s target hazard index of 1.0. However, the only individual constituents or individual hazards by target organ with a hazard above 1.0, was associated with iron. Based on the statistical evaluation presented in the RI, the concentrations of iron in the surface soil at Site 10 is considered to be consistent with background conditions and, therefore, not associated with site activities.

2-10 090540001WDC SECTION 2—DECISION SUMMARY

2.7.3 Human Health Risk Assessment Results – After Removal Action The WNY Tier I Team decided to address the risks described in Section 2.7.2 by conducting a NTCRA that excavated all soil that contained lead concentrations greater than the screening value of 400 mg/kg. This was done for all areas even if the average lead concentration for a particular building area was less than 400 mg/kg and did not indicate an unacceptable risk from lead exposure. This removal action also excavated all soil that had previously contained RBC-exceedences of other COPCs. Because the removal action cleaned up the site soil to concentrations below the screening value for lead, no post­ removal action risk assessment was deemed to be warranted and no unacceptable risks are present.

2.7.4 Ecological Risk Assessment Process A screening-level ERA (SERA) was conducted as part of the Focused RI report for Site 10 (CH2M HILL, 2004) in accordance with EPA requirements in effect at the time. The purpose was to characterize the potential for unacceptable ecological risks to plants and animals at Site 10 under conditions that existed prior to soil removal action. Because the subsequent removal action cleaned up the site soil to concentrations below the screening value for lead risks to animals, and removed the soil where several other constituents (e.g., dieldrin) posed potentially unacceptable risks, no post-removal action risk assessment was deemed to be warranted. The SERA process consisted of the following components and used the noted general parameters and assumptions:

� Screening-Level Problem Formulation and Ecological Effects Evaluation - Problem formulation establishes the goals, scope, and focus of the risk assessment. As part of problem formulation, a conceptual model is developed for the site that describes potential sources, potential transport pathways, potential exposure pathways and routes, and potential receptors, while taking into account the environmental setting of the site and types and concentrations of chemicals present in ecologically relevant media. Assessment endpoints, measurement endpoints, and risk hypotheses are then selected to evaluate those receptors for which complete and potentially significant exposure pathways are likely to exist. The fate, transport, and toxicological properties of the constituents present at a site are also considered during this process. The conclusion of the screening-level problem formulation includes the selection of ecological endpoints, which are based on the preliminary conceptual model. Two types of endpoints, assessment endpoints and measurement endpoints, are defined as part of the ERA process, as are risk hypotheses or risk questions. Risk hypotheses are testable hypotheses about the relationship among the assessment endpoints and their predicted responses when exposed to contaminants.

� Screening-Level Exposure Estimate and Risk Calculation - Maximum concentrations in surface soil were used to conservatively estimate potential chemical exposures for the ecological receptors selected to represent the assessment endpoints at Site 10. Exposure for soil invertebrates and plants was assessed by comparing surface soil chemical concentrations with direct-contact screening values derived from the literature.

090540001WDC 2-11 FINAL-RECORD OF DECISION FOR SITE 10

Lower trophic level receptor species are evaluated in the SERA based on those taxonomic groupings for which screening values have been developed; these groupings and screening values are used in most ecological risk assessments. As such, specific species of terrestrial plants and soil invertebrates are not identified as receptors because these groups are dealt with on a community level via a comparison to soil screening values. Soil screening values used in this ERA were developed to be protective of terrestrial plants and soil invertebrates (e.g., earthworms) and, thus, meeting these criteria should be generally protective of most terrestrial plant and invertebrate species. Exposures for upper trophic level receptor species via the food web were determined by estimating the chemical-specific concentrations in each dietary component using uptake and food web models. Incidental ingestion of soil and ingestion of water was also included when calculating the total level of exposure. As indicated previously, maximum surface soil concentrations were used in all calculations to provide a conservative assessment. The upper trophic level specific receptor species selected to evaluate exposure included the American robin, mourning dove, and gray squirrel. Upper trophic level receptor exposures to chemicals in surface soil were determined by estimating the concentration of each chemical in each relevant dietary component. Incidental ingestion of soil was also included when calculating the total exposure.

� Screening-Level Risk Calculation - The screening-level risk calculation is the final step in a SERA. In this step, the maximum exposure concentrations (abiotic media) or exposure doses (upper trophic level receptor species) are compared with the corresponding screening values to derive screening risk estimates. The outcome of this step is a list of preliminary COPCs for each media-pathway-receptor combination evaluated or a conclusion of acceptable risk. Preliminary COPCs are selected by calculating hazard quotients. Chemicals with HQs greater than or equal to 1.0 are considered preliminary COPCs in the SERA.

� Baseline ERA Refinement of Conservative Exposure Assumptions - In this step, exposure assumptions are refined and risk estimates [i.e., hazard quotients (HQs)] are recalculated. Risk is again characterized and uncertainties associated with conclusions are described. If re-evaluation of the conservative exposure assumptions supports an acceptable risk determination then the site may exit the ecological risk assessment process.

2.7.5 Ecological Risk Assessment Results – Before Removal Action The majority of Site 10 is covered with buildings or other impervious surfaces. Leutze Park is the only substantially vegetated area included in the site. Therefore, there is little habitat available for ecological receptors at the site, and a complete exposure pathway does not exist for receptor exposure to contaminants in surface soils over the vast majority of Site 10. The only area where a complete exposure pathway exists for surface soil is in the Leutze Park area and the small grass-covered areas along Admiral’s Row. The CSM for ecological exposure is depicted in Figure 2-5.

2-12 090540001WDC SECTION 2—DECISION SUMMARY

The results of the screening ERA indicated that, based on a set of conservative assumptions, there are several chemicals that may pose a risk to each of the receptor communities/ species evaluated in the screening assessment. Assumptions and methods that were modified for the calculation of media-specific and food web HQs were used to refine and weigh the evidence of potential risk for each preliminary COPC identified for each of the media to assess whether the COPCs should be carried on for further evaluation in a baseline risk assessment. Results of Step 3 of the risk assessment process are discussed below.

Media Specific Risks - Soil Invertebrates and Plants The mean concentration of lead exceeded the screening value in soil for soil invertebrates and plants in each part of Site 10 (Table 2-4) indicating that lead posed a potential risk to these receptors at Site 10. Six pesticides (4,4’-DDE, 4,4’-DDT, gamma chlordane, endosulfan II, dieldrin, heptachlor and endosulfan sulfate) were retained as COPCs for soil invertebrates and plants for various areas at Site 10 (Tables 2-5 through 2-8). For the soil at Quarters A, only two metals (antimony and manganese) were not carried forward for further consideration for soil invertebrates and plants (Table 2-5). Five SVOCs were retained as COPCs for the soil at Quarters A because they had either mean chemical concentrations greater than the screening values or no screening value was available for the chemical.

Food Web Risks – Upper Trophic Level Receptors The lead concentrations in soil across Site 10 posed a potential risk to insectivorous and herbivorous birds (e.g., robin and dove), but not to herbivorous mammals, such as the gray squirrel (Table 2-9). Thus, lead is a COPC for each of the areas evaluated at Site 10. Additionally, the no-observed-adverse-effect-level (NOAEL)-based HQ for dieldrin slightly exceeded 1.0 for the robin and the squirrel, and the NOAEL-based HQ for 4,4’-DDE exceeded 1.0 for the robin. None of these pesticides were present at concentrations predicted to result in dosages that exceed lowest-observed-adverse-effect-level (LOAEL)­ based toxicity values. Therefore, while dieldrin and 4,4’-DDE pose a potential risk to upper trophic level receptors at Site 10, the risk is likely minimal. Zinc was also identified as posing a potential risk to upper trophic level receptors, but only in that soil at Quarters A. The average concentration of zinc in surface soil was predicted to exceed the NOAEL-based toxicity values for both insectivorous and herbivorous birds, but it did not exceed the LOAEL-based toxicity value. Therefore, the potential risk to insectivorous and herbivorous birds from zinc in the surface soil at Site 10 is likely minimal. In summary, lead was the only bioaccumulative chemical detected in surface soil at Site 10 that was predicted to result in dosages that exceed LOAEL-based toxicity values for upper trophic level receptors and, therefore, is the only chemical that poses more than a minimal risk to insectivorous and herbivorous birds.

2.7.6 Ecological Risk Assessment Results – After Removal Action The results of the ecological risk screening determined that lead in surface soil posed a potential risk to soil invertebrates (such as worms and insects), plants, and birds over the

090540001WDC 2-13 FINAL-RECORD OF DECISION FOR SITE 10 majority of Site 10. However, the cleanup level of 400 ppm used for the removal action for lead in soil, which is based on risk to a residential child, is also protective of upper trophic level animals. While the 400 ppm level may exceed screening criteria for some native plants, the SERA determined that there are no natural undisturbed habitats at Site 10 and, as a result, no exposure pathway to a native vegetation population. Therefore, these risks were adequately mitigated by removing all soil with lead concentrations greater than 400 ppm. While the ecological risks related to pesticides, such as dieldrin, were determined to be acceptable in the Site 10 RI, the soil that contained the pesticide concentrations used in the ERA was coincidentally removed under the NTRCA. Current soil conditions are documented in the Site 10 Removal Action Master Report (CH2M HILL, 2005).

2.8 Selected Remedy The Navy and EPA, with the concurrence of DDOE, have selected no further action as the remedy for the soil at Site 10. Based on the results of the investigations and soil removals conducted at Site 10, the Navy, EPA, and DDOE have determined that exposure to the soil remaining at Site 10 after the removal action does not pose an unacceptable risk to humans, plants, or animals; therefore, no alternative other than the no further action alternative was evaluated. Under this selected remedy, no further response action will be performed at the site; therefore, no remedy schedule, capital cost estimation, or annual operations or maintenance are necessary. This ROD only considers soil; groundwater at the WNY is currently being evaluated base­ wide as a separate entity under separate investigative documents. Additionally, potential contamination inherent in fill material at the WNY is currently being evaluated as part of a separate investigation for SSA 12.

2.9 Documentation of Significant Changes The selected remedy is the same alternative identified as the Preferred Alternative in the Proposed Plan, which was presented to the public at a public meeting held on September 10, 2008. Written comments received during the 30-day public comment period are presented and addressed in the responsiveness summary in Section 3. It was determined that no significant changes to this decision, as originally identified in the Proposed Plan, were necessary or appropriate.

2-14 090540001WDC SECTION 3 Responsiveness Summary

The Responsiveness Summary is a concise and complete summary of significant comments received from the public during the public comment period and includes responses to these comments. The Responsiveness Summary was prepared after the public comment period, which ended on October 10, 2008, in accordance with US EPA guidance (EPA, 2002). The Responsiveness Summary provides the decision maker with information about the views of the community. It also documents how the Navy, EPA, and DDOE considered public comments during the decision-making process and provides answers to major comments.

3.1 Overview The Proposed Plan as presented to the public identified that no further action is necessary for soil at Site 10 in order to protect human health and the environment.

3.2 Background on Community Involvement The public comment period for the proposed no further action decision for Site 10 began on September 10, 2008 and ended on October 10, 2008. A public meeting was held on September 10, 2008, in the 2nd Floor Conference Room in Building 212 at the WNY, located at 1314 Harwood Street, S.E., Washington, D.C., to present information pertinent to the proposed remedy and to accept verbal comments on this decision. The public meeting transcript is attached as Appendix C.

3.3 Summary of Comments Received During the Public Comment Period, Navy Responses No community members expressed dissatisfaction with the Navy’s selection of “No Further Remedial Action” for Site 10. Two questions were raised at the September 10 public meeting. These are paraphrased below along with the Navy and EPA’s consolidated response. No other questions were received during the public comment period.

Comments Raised During the September 10, 2008 Public Meeting for Site 10 Comment 1. Somewhere in the Record of Decision it should mention the fact that the Navy gave all of the residents on Admiral‘s Row letters telling them about the contamination and letting them sign off on understanding the risks. Somewhere in the record it should to say that we (the WNY RAB) made sure that they were aware of just what the conditions were when they were moving in. And now it’s fine. We need to show human side of the fact that we’ve let them know in advance. We didn’t just hush-hush the matter; we let them know and removed shrubs and everything from around there.

090540001WDC 3-1 FINAL-RECORD OF DECISION FOR SITE 10

Response to Comment 1. The section titled 2003-2008 Institutional Controls and Removal Actions in Section 2.2.2, describes the actions that the Navy and the WNY partnering team and RAB took to inform the residents and workers at the various buildings within Site 10 about the conditions and potential risks related to the lead in the soil. These included distribution of fact sheets and group presentations. It is also noted that as residents and workers changed, new residents and workers were informed of the conditions and restrictions. Comment 2. Did the process used to conduct the work follow the ASTM procedures? Response to Comment 2. American Society for Testing and Materials (ASTM) procedures were not specifically relevant to the work, the processes required to be used to identify, characterize, assess risks and select removal actions and the final preferred remedy followed EPA’s CERCLA procedures.

3-2 090540001WDC SECTION 4 References

American Cancer Society. 2002. Cancer Facts and Figures—‘02. Atlanta, Ga. Baker Environmental, Inc. 1993. Final Preliminary Assessment, Washington Navy Yard, Washington, D.C. Baker Environmental, Inc. 1996. Site Investigation, Washington Navy Yard, Washington, D.C. CH2M HILL. 2000a. FFA Draft Remedial Investigation Initial Findings Report, Washington Navy Yard, Washington, D.C. October. CH2M HILL. 2000b. FFA Draft Remedial Investigation Initial Findings Report Addendum, Washington Navy Yard, Washington, D.C. April. CH2M HILL. 2002. FFA Final Phase II Remedial Investigation Project Plans for Sites 10. Washington Navy Yard, Washington, D.C. CH2M HILL. 2004. FFA Final Focused Remedial Investigation for Site 10, Washington Navy Yard, Washington, D.C. May. CH2M HILL. 2005. FFA Final Site 10 Removal Action Master Report, Washington Navy Yard, Washington, D.C. October. CH2M HILL. 2007. Site Management Plan, Fiscal Year 2008, Washington Navy Yard, Washington, D.C. September. Chief of Naval Operations. 1999. Navy Policy for Conducting Ecological Risk Assessments. Department of the Navy. 1998. Letter, “Addition to RCRA Consent Order Site 10 at the Washington Navy Yard.” July. EPA. 1989. Risk Assessment Guidance for Superfund Volume I: Human Health Evaluation Manual (Part A), Interim Final. EPA/540/1-89/002. EPA. 1991. Human Health Evaluation Manual, Supplemental Guidance: “Standard Default Exposure Factors.” OSWER Directive 9285.6-03. March. EPA. 1996. Recommendations of the Technical Review Workgroup for Lead for an Interim Approach to Assessing Risks Associated with Adult Exposures to Lead in Soil. December. EPA. 1999. Federal Facility Agreement (under CEDRCLA Section 120), Washington Navy Yard, Washington, D.C. Administrative Docket Number III-FCA-CERC-016. EPA. 2001. Risk Assessment Guidance for Superfund Volume I: Human Health Evaluation Manual (Part E, Supplemental Guidance for Dermal Risk Assessment) Interim. EPA540/R/99/005. September. EPA. 2002. Superfund Community Involvement Handbook. Office of Solid Waste and Emergency Response. EPA 540-K-01-003. April.

090540001WDC 4-1 FINAL-RECORD OF DECISION FOR SITE 10

EPA. 2003. ProUCL, Version 2.1. Prepared by Lockheed Martin Environmental Services. April. EPA, Region III. 2003. Risk-Based Concentration Table. October.

4-2 090540001WDC Tables Table 2-1 Summary of RME Cancer Risks and Hazard Indices Site 10 Record of Decision Washington Navy Yard, Washington, DC

­ Chemicals with Cancer Chemicals with Cancer Risks Constituents with Cancer Risks >10 Hazard Receptor Media Exposure Route Cancer Risk Risks >10-4 >10-5 and <10-4 6 and <10-5 Index Constituents with HI>1 Current/Future Surface Soil - Ingestion 1.6E-05 Dieldrin Arsenic 0.27 Industrial Worker Building A Dermal Contact 4.3E-05 Dieldrin Arsenic 1.1 Inhalation N/A N/A Total 5.9E-05 1.4 Subsurface Soil - Ingestion 4.3E-06 Arsenic 0.19 Building A Dermal Contact 5.6E-06 Arsenic, Dieldrin 0.81 Inhalation N/A N/A Total 9.9E-06 1.0 All Media Total 6.9E-05 2.4 Surface Soil - Ingestion 3.0E-06 Arsenic 0.019 Building F Dermal Contact 3.1E-06 Arsenic 0.019 Inhalation NA N/A Total 6.1E-06 0.038 All Media Total 6.1E-06 0.038 Surface Soil - Ingestion 9.4E-06 Arsenic 0.059 Building H Dermal Contact 9.7E-06 Arsenic 0.060 Inhalation NA NA Total 1.9E-05 0.12 All Media Total 1.9E-05 0.12 Surface Soil - Ingestion 3.7E-06 Arsenic 0.023 Building N Dermal Contact 3.8E-06 Arsenic 0.024 Inhalation N/A N/A Total 7.5E-06 0.047 All Media Total 7.5E-06 0.047 Subsurface Soil - Ingestion 4.7E-06 Arsenic, Benzo(a)pyrene 0.12 Building B Dermal Contact 9.6E-06 Arsenic, Benzo(a)pyrene 0.32 Inhalation N/A N/A Total 1.4E-05 0.44 All Media Total 1.4E-05 0.44 Subsurface Soil - Ingestion 1.9E-06 Arsenic 0.22 Building D Dermal Contact 1.9E-06 Arsenic 0.73 Inhalation NA N/A Total 3.8E-06 0.95 All Media Total 3.8E-06 0.95 Subsurface Soil - Ingestion N/A 0.15 Building O Dermal Contact N/A 0.58 Inhalation N/A N/A Total 0.0E+00 0.72 All Media Total 0.0E+00 0.72 Current/Future Surface Soil - Ingestion 3.2E-06 Dieldrin 0.056 Gardener Building A Dermal Contact 4.3E-06 Dieldrin 0.119 Inhalation NA N/A Total 7.5E-06 0.17 Subsurface Soil - Ingestion 8.5E-07 Arsenic 0.04 Building A Dermal Contact 5.6E-07 Arsenic 0.08 Inhalation NA NA Total 1.4E-06 0.12 All Media Total 8.9E-06 0.30 Surface Soil - Ingestion 6.0E-07 0.0039 Building F Dermal Contact 3.1E-07 0.0020 Inhalation NA N/A Total 9.0E-07 0.0059 All Media Total 9.0E-07 0.0059

Page 1 of 3 Table 2-1 Summary of RME Cancer Risks and Hazard Indices Site 10 Record of Decision Washington Navy Yard, Washington, DC

­ Chemicals with Cancer Chemicals with Cancer Risks Constituents with Cancer Risks >10 Hazard Receptor Media Exposure Route Cancer Risk Risks >10-4 >10-5 and <10-4 6 and <10-5 Index Constituents with HI>1 Current/Future Surface Soil - Ingestion 1.9E-06 Arsenic 0.012 Gardener (cont'd) Building H Dermal Contact 9.7E-07 0.0063 Inhalation N/A NA Total 2.9E-06 0.018 All Media Total 2.9E-06 0.018 Surface Soil - Ingestion 7.4E-07 0.0048 Building N Dermal Contact 3.8E-07 0.0025 Inhalation N/A N/A Total 1.1E-06 0.0073 All Media Total 1.1E-06 0.0073 Subsurface Soil - Ingestion 9.4E-07 0.025 Building B Dermal Contact 9.6E-07 0.033 Inhalation N/A N/A Total 1.9E-06 0.058 All Media Total 1.9E-06 0.058 Subsurface Soil - Ingestion 3.8E-07 0.046 Building D Dermal Contact 1.9E-07 0.076 Inhalation N/A N/A Total 5.7E-07 0.12 All Media Total 5.7E-07 0.12 Subsurface Soil - Ingestion N/A 0.030 Building O Dermal Contact N/A 0.060 Inhalation N/A N/A Total 0.0E+00 0.090 All Media Total 0.0E+00 0.090 Current/Future Surface Soil - Ingestion 7.1E-05 Arsenic, Dieldrin 0.37 Resident - Adult* Building A Dermal Contact 1.8E-05 Dieldrin Arsenic 0.19 Inhalation N/A N/A Total 8.9E-05 0.56 Subsurface Soil - Ingestion 1.9E-05 Arsenic Dieldrin 0.27 Building A Dermal Contact 2.3E-06 Arsenic 0.13 Inhalation N/A N/A Total 2.1E-05 0.40 All Media Total 1.1E-04 0.96 Surface Soil - Ingestion 1.3E-05 Arsenic 0.026 Building F Dermal Contact 1.3E-06 Arsenic 0.0031 Inhalation NA N/A Total 1.5E-05 0.029 All Media Total 1.5E-05 0.029 Surface Soil - Ingestion 4.2E-05 Arsenic 0.082 Building H Dermal Contact 4.0E-06 Arsenic 0.0098 Inhalation N/A N/A Total 4.6E-05 0.092 All Media Total 4.6E-05 0.092 Surface Soil - Ingestion 1.7E-05 Arsenic 0.032 Building N Dermal Contact 1.6E-06 Arsenic 0.0039 Inhalation N/A N/A Total 1.8E-05 0.036 All Media Total 1.8E-05 0.036 Subsurface Soil - Ingestion 2.1E-05 Arsenic Benzo(a)pyrene 0.17 Building B Dermal Contact 4.0E-06 Arsenic, Benzo(a)pyrene 0.052 Inhalation N/A N/A Total 2.5E-05 0.22 All Media Total 2.5E-05 0.22

Page 2 of 3 Table 2-1 Summary of RME Cancer Risks and Hazard Indices Site 10 Record of Decision Washington Navy Yard, Washington, DC

­ Chemicals with Cancer Chemicals with Cancer Risks Constituents with Cancer Risks >10 Hazard Receptor Media Exposure Route Cancer Risk Risks >10-4 >10-5 and <10-4 6 and <10-5 Index Constituents with HI>1 Current/Future Subsurface Soil - Ingestion 8.5E-06 Arsenic 0.31 Resident - Adult* (cont'd) Building D Dermal Contact 8.0E-07 0.12 Inhalation N/A N/A Total 9.3E-06 0.43 All Media Total 9.3E-06 0.43 Subsurface Soil - Ingestion N/A 0.21 Building O Dermal Contact N/A 0.094 Inhalation N/A N/A Total 0.0E+00 0.30 All Media Total 0.0E+00 0.30 Current/Future Surface Soil - Ingestion 3.49 Iron Resident - Child Building A Dermal Contact 1.22 Inhalation N/A Total 4.7 Subsurface Soil - Ingestion 2.5 Building A Dermal Contact 0.87 Inhalation NA Total 3.4 All Media Total 8.1 Surface Soil - Ingestion 0.24 Building F Dermal Contact 0.020 Inhalation N/A Total 0.26 All Media Total 0.26 Surface Soil - Ingestion 0.77 Building H Dermal Contact 0.064 Inhalation N/A Total 0.83 All Media Total 0.83 Surface Soil - Ingestion 0.30 Building N Dermal Contact 0.025 Inhalation N/A Total 0.33 All Media Total 0.33 Subsurface Soil - Ingestion 1.6 Building B Dermal Contact 0.34 Inhalation N/A Total 1.9 All Media Total 1.9 Subsurface Soil - Ingestion 2.9 Iron Building D Dermal Contact 0.78 Inhalation N/A Total 3.7 All Media Total 3.7 Subsurface Soil - Ingestion N/A 1.9 Iron Building O Dermal Contact N/A 0.62 Inhalation N/A N/9 Total 0.0E+00 2.5 All Media Total 0.0E+00 2.5 * Cancer risks reported were calculated for the adult/child scenario.

Page 3 of 3 Table 2-2 Summary of CT Hazard Indices Site 10 Record of Decision Washington Navy Yard, Washington, DC

Hazard Receptor Media Exposure Route Index Constituents with HI>1 Current/Future Surface Soil - Ingestion 0.67 Industrial Worker Building A Dermal Contact 0.073 Inhalation N/A Total 0.75 All Media Total 0.75 Current/Future Surface Soil - Ingestion 0.67 Resident - Child Building A Dermal Contact 0.073 Inhalation N/A Total 0.75 Subsurface Soil - Ingestion 0.55 Building A Dermal Contact 0.052 Total 0.60 All Media Total 1.4 Subsurface Soil - Ingestion 0.49 Building B Dermal Contact 0.033 Inhalation N/A Total 0.52 All Media Total 0.52 Subsurface Soil - Ingestion 0.72 Building D Dermal Contact 0.064 Inhalation N/A Total 0.79 All Media Total 0.79 Subsurface Soil - Ingestion 0.64 Building O Dermal Contact 0.062 Inhalation N/A Total 0.70 All Media Total 0.70

Page 1 of 1 Table 2-3 Surface Soil Lead Model Results Site 10 Record of Decision Washington Navy Yard, Washington, DC

Lead Surface Soil Risk Assesment Results IEUBK Results Adult Lead Model Results Maternal Blood 95th Percentile Average Based on Average Lead Geometric Level PbB Among Probability that fetal Normal/Lognormal Concentration Mean PbB % Population Concentration Fetuses of Adult PbB > PbBt, assuming Building Distribution in Soil (mg/kg) (ug/dL) Above PbBt (ug/dL) Workers (ug/dL) lognormal distribution B Lognormal 442 5.4 9.7% 2.4 8.6 3.4% C Lognormal 652 7.0 22.7% 2.7 9.7 4.6% D Lognormal 906 8.8 39.5% 3.1 11.0 6.3% E Lognormal 433 5.4 9.2% 2.4 8.6 3.4% G Lognormal 793 8.1 32.2% 2.9 10.4 5.5% LM Lognormal 439 5.4 9.5% 2.4 8.6 3.4% M1 Lognormal 1,372 11.8 63.5% 3.8 13.4 9.8% O Lognormal 745 7.7 29.0% 2.9 10.2 5.2% R Lognormal 523 6.1 14.4% 2.6 9.0 3.9%

Definitions: PbB - concentration of lead in blood PbBt - target USEPA blood lead concentration of concern, 10 ug/dL Notes: If % Population Above PbBt of 10 ug/dl is greater than 5%, exposure to lead in soil may be a health concern for the child resident. If Probability that fetal PbB > PbBt greater than 5%, exposure to lead in soil by adult workers may be a health concern to fetuses. Shaded cells exceed criteria

Page 1 of 1 Table i e e ur a e il ree i g r ea r er Tr i e el e e rs Washington Navy Yard, Washington, D.C. Fre ue ai u a le ea erai ai u ri e i reeig aar eial ee i ee e erai ea alue uie ea g g Quarters A 40 / 40 58600 WS10-SS36 2573 50 51.5 Yes

Site 10-Wide 316 / 316 58600 WS10-SS36 746 50 14.9 Yes

Admiral's Row (Quarters C-H, LM, M1, N, O, P, R, V) 190 / 190 18700 260 895 50 17.9 Yes

Building 1 24 / 24 3350 177 654 50 13.1 Yes

Quarters B 13 / 13 2060 153 829 50 16.6 Yes

Quarters U 13 / 13 1860 120 364 50 7.3 Yes

Quarters S,T,W,Y 26 / 26 830 89 115 50 2.3 Yes

Leutze Park 10 / 10 441 134 161 50 3.2 Yes

Page 1 of 1 Table i e uar ers e ur a e il ree i g r er Tr i e el e e rs Washington Navy Yard, Washington D.C. Fre ue ai u a le ea erig erai ai u ri e i reeig Fre ue aar eial ii age ee i ee e erai ea alue ee a e uie rga i s Aluminum 0.85 - 1.00 4 / 4 12,000 WS10-SS27 6,853 1.00 4 / 4 6,853 Antimony 0.64 - 0.79 0 / 4 -­ -­ 0.54 0.48 -­ / -­ 1.12 (YES) Beryllium 0.21 - 0.26 3 / 4 1.10 WS10-SS27 0.61 0.020 3 / 4 30.4 Chromium 0.21 - 0.26 4 / 4 44.7 WS10-SS27 32.9 0.0075 4 / 4 4,387 Copper 0.21 - 0.26 4 / 4 81.6 WS10-SS26 62.2 15.0 4 / 4 4.15 Iron 3.20 - 3.90 4 / 4 29,300 WS10-SS27 18,473 12.0 4 / 4 1,539 Lead 0.21 - 0.26 4 / 4 4,540 WS10-SS28 2,171 50 4 / 4 43 Manganese 0.21 - 0.26 4 / 4 401 WS10-SS27 295 330 2 / 4 0.89 NO Mercury 0.11 - 0.12 3 / 4 1.60 WS10-SS38 0.67 0.058 3 / 4 11.5 Nickel 0.21 - 0.26 4 / 4 13.2 WS10-SS27 8.55 2.00 4 / 4 4.28 Silver 0.43 - 0.52 4 / 4 1.90 WS10-SS27 1.21 9.80E-06 4 / 4 123,469 Thallium 0.64 - 0.79 1 / 4 0.99 WS10-SS38 0.51 0.0010 1 / 4 513 Vanadium 0.21 - 0.26 4 / 4 44.3 WS10-SS27 26.7 0.50 4 / 4 53.3 Zinc 0.43 - 0.52 4 / 4 1,100 WS10-SS28 590 10.0 4 / 4 59.0 esi i e l lriae i e ls Dieldrin 3.70 - 4.30 4 / 4 2,000 WS10-SS27 632 100 3 / 4 6.32 Heptachlor 1.80 - 2.20 1 / 4 2.00 WS10-SS27 1.21 NSV -­ / -- NSV gamma-Chlordane 1.80 - 2.20 4 / 4 37.0 WS10-SS27 13.9 NSV -­ / -- NSV e i la ile rga i u s 1,2,4-Trichlorobenzene 370 - 430 0 / 4 -­ -­ 199 100 -­ / -­ 1.99 (YES) 1,2-Dichlorobenzene 370 - 430 0 / 4 -­ -­ 199 100 -­ / -­ 1.99 (YES) 1,4-Dichlorobenzene 370 - 430 0 / 4 -­ -­ 199 100 -­ / -­ 1.99 (YES) 2,4,5-Trichlorophenol 890 - 1,100 0 / 4 -­ -­ 486 100 -­ / -­ 4.86 (YES) 2,4,6-Trichlorophenol 370 - 430 0 / 4 -­ -­ 199 100 -­ / -­ 1.99 (YES) 2,4-Dichlorophenol 370 - 430 0 / 4 -­ -­ 199 100 -­ / -­ 1.99 (YES) 2,4-Dimethylphenol 370 - 430 0 / 4 -­ -­ 199 100 -­ / -­ 1.99 (YES) 2,4-Dinitrophenol 890 - 1,100 0 / 4 -­ -­ 486 100 -­ / -­ 4.86 (YES)

NSV - No Screening Value Shaded cells indicate hazard quotient based on reporting limits Page 1 of 2 Table i e uar ers e ur a e il ree i g r er Tr i e el e e rs Washington Navy Yard, Washington D.C. Fre ue ai u a le ea erig erai ai u ri e i reeig Fre ue aar eial ii age ee i ee e erai ea alue ee a e uie 2-Chlorophenol 370 - 430 0 / 4 -­ -­ 199 100 -­ / -­ 1.99 (YES) 2-Methylphenol 370 - 430 0 / 4 -­ -­ 199 100 -­ / -­ 1.99 (YES) 4-Methylphenol 370 - 430 0 / 4 -­ -­ 199 100 -­ / -­ 1.99 (YES) 4-Nitrophenol 890 - 1,100 0 / 4 -­ -­ 486 100 -­ / -­ 4.86 (YES) Acenaphthene 370 - 430 0 / 4 -­ -­ 199 100 -­ / -­ 1.99 (YES) Acenaphthylene 370 - 430 0 / 4 -­ -­ 199 100 -­ / -­ 1.99 (YES) Anthracene 370 - 430 0 / 4 -­ -­ 199 100 -­ / -­ 1.99 (YES) Benzo(g,h,i)perylene 370 - 430 0 / 4 -­ -­ 199 100 -­ / -­ 1.99 (YES) Butylbenzylphthalate 370 - 430 1 / 4 190 WS10-SS28 196 NSV -­ / -- NSV Di-n-butylphthalate 370 - 430 4 / 4 1,400 WS10-SS28 483 NSV -­ / -- NSV Dibenz(a,h)anthracene 370 - 430 0 / 4 -­ -­ 199 100 -­ / -­ 1.99 (YES) Fluoranthene 370 - 430 3 / 4 170 WS10-SS28 132 100 2 / 4 1.32 Fluorene 370 - 430 0 / 4 -­ -­ 199 100 -­ / -­ 1.99 (YES) Naphthalene 370 - 430 0 / 4 -­ -­ 199 100 -­ / -­ 1.99 (YES) Pentachlorophenol 890 - 1,100 0 / 4 -­ -­ 486 100 -­ / -­ 4.86 (YES) Phenol 370 - 430 0 / 4 -­ -­ 199 100 -­ / -­ 1.99 (YES) Pyrene 370 - 430 3 / 4 170 WS10-SS28 129 100 1 / 4 1.29 bis(2-Ethylhexyl)phthalate 370 - 430 1 / 4 47.0 WS10-SS28 161 NSV -­ / -- NSV la ile rga i u s Acetone 10.0 - 13.0 3 / 4 14.0 WS10-SS28 7.53 NSV -­ / -- NSV

NSV - No Screening Value Shaded cells indicate hazard quotient based on reporting limits Page 2 of 2 Table i e a reas e ur a e il ree i g r er Tr i e el e e rs Washington Navy Yard, Washington D.C. Fre ue ai u a le ea erig erai ai u ri e i reeig Fre ue aar eial ii age ee i ee e erai ea alue ee a e uie esi i e l lriae i e ls 4,4'-DDE 4.30 - 19.0 4 / 4 720 WS10-DS61-00 418 100 4 / 4 4.18 4,4'-DDT 4.30 - 19.0 4 / 4 290 WS10-DS61-00 223 100 4 / 4 2.23 gamma-Chlordane 2.20 - 9.70 4 / 4 33.0 WS10-DS172-00 15.3 NSV -­ / -- NSV

NSV - No Screening Value Shaded cells indicate hazard quotient based on reporting limits Page 1 of 1 Table i e ar e reas e ur a e il ree i g r er Tr i e el e e rs Washington Navy Yard, Washington D.C. Fre ue ai u a le ea erig erai ai u ri e i reeig Fre ue aar eial ii age ee i ee e erai ea alue ee a e uie esi i e l lriae i e ls 4,4'-DDE 4.70 - 27.0 5 / 5 360 WS10-DS116-00 186 100 4 / 5 1.86 4,4'-DDT 4.70 - 27.0 5 / 5 180 WS10-DS116-00 90.0 100 1 / 5 0.90 NO Endosulfan II 4.70 - 27.0 1 / 5 3.40 WS10-DS116-00 4.84 NSV -­ / -- NSV Methoxychlor 24.0 - 140 0 / 5 -­ -­ 24.4 100 -­ / -­ 0.24 NO gamma-Chlordane 2.40 - 14.0 3 / 5 13.0 WS10-DS116-00 5.43 NSV -­ / -- NSV

NSV - No Screening Value Shaded cells indicate hazard quotient based on reporting limits Page 1 of 1 Table i e ig reas e ur a e il ree i g r er Tr i e el e e rs Washington Navy Yard, Washington D.C. Fre ue ai u a le ea erig erai ai u ri e i reeig Fre ue aar eial ii age ee i ee e erai ea alue ee a e uie esi i e l lriae i e ls 4,4'-DDE 5.40 - 20.0 3 / 3 310 WS10-DS95-00 134 100 1 / 3 1.34 4,4'-DDT 5.40 - 20.0 3 / 3 130 WS10-DS148-00 80.3 100 1 / 3 0.80 NO Dieldrin 5.40 - 20.0 2 / 3 1,100 WS10-DS148-00 373 100 1 / 3 3.73 Endosulfan II 5.40 - 20.0 2 / 3 6.30 WS10-DS148-00 6.73 NSV -­ / -- NSV Endosulfan sulfate 5.40 - 20.0 1 / 3 11.0 WS10-DS173-00 6.57 NSV -­ / -- NSV Methoxychlor 28.0 - 110 0 / 3 -­ -­ 33.5 100 -­ / -­ 0.34 NO alpha-Chlordane 2.80 - 11.0 2 / 3 100 WS10-DS148-00 48.8 100 1 / 3 0.49 NO gamma-Chlordane 2.80 - 11.0 3 / 3 87.0 WS10-DS148-00 42.3 NSV -­ / -- NSV

NSV - No Screening Value Shaded cells indicate hazard quotient based on reporting limits Page 1 of 1 Table 2-9 Summary of Hazard Quotients for Food Web Exposures for Site 10 Average Exposure Dose Washington Navy Yard, Washington D.C.

American Robin Mourning Dove Gray Squirrel Chemical NOAEL LOAEL NOAEL LOAEL NOAEL LOAEL Arsenic 0.07 0.02 0.03 0.01 0.27 0.03 Cadmium 0.15 0.01 0.02 0.00 0.06 0.01 Chromium 0.79 0.16 0.22 0.04 0.01 0.00 Copper 0.05 0.03 0.03 0.02 0.05 0.04 Lead 25.00 2.50 10.42 1.04 0.78 0.08 Mercury 0.11 0.05 0.07 0.03 0.46 0.09 Nickel 0.01 0.01 0.00 0.00 0.00 0.00 Selenium 0.17 0.05 0.18 0.09 0.12 0.07 Silver 0.00 0.00 0.00 0.00 0.00 0.00 Zinc* 5.49 0.61 1.86 0.21 0.15 0.07

4,4'-DDD 0.02 0.00 0.00 0.00 0.00 0.00 4,4'-DDE 1.94 0.19 0.01 0.00 0.03 0.01 4,4'-DDT 0.09 0.01 0.01 0.00 0.00 0.00 Aldrin 0.00 0.00 0.00 0.00 0.00 0.00 alpha-BHC 0.00 0.00 0.00 0.00 0.00 0.00 alpha-Chlordane 0.00 0.00 0.00 0.00 0.00 0.00 Aroclor-1016 0.01 0.00 0.00 0.00 0.00 0.00 Aroclor-1221 0.02 0.00 0.00 0.00 0.03 0.00 Aroclor-1232 0.01 0.00 0.00 0.00 0.02 0.00 Aroclor-1242 0.01 0.00 0.00 0.00 0.02 0.00 Aroclor-1248 0.02 0.00 0.00 0.00 0.00 0.00 Aroclor-1254 0.02 0.00 0.00 0.00 0.02 0.00 Aroclor-1260 0.02 0.00 0.00 0.00 0.02 0.00 beta-BHC 0.00 0.00 0.00 0.00 0.00 0.00 delta-BHC 0.00 0.00 0.00 0.00 0.00 0.00 Dieldrin 1.17 0.12 0.03 0.00 1.27 0.13 Endosulfan I 0.00 0.00 0.00 0.00 0.00 0.00 Endosulfan II 0.00 0.00 0.00 0.00 0.00 0.00 Endrin 0.04 0.00 0.00 0.00 0.00 0.00 Gamma-BHC (Lindane) 0.00 0.00 0.00 0.00 0.00 0.00 Gamma-Chlordane 0.00 0.00 0.00 0.00 0.00 0.00 Heptachlor 0.00 0.00 0.00 0.00 0.00 0.00 Heptachlor Epoxide 0.01 0.00 0.00 0.00 0.01 0.00 Methoxychlor 0.00 0.00 0.00 0.00 0.00 0.00 Toxaphene 0.04 0.00 0.01 0.00 0.00 0.00

1,2,4-Trichlorobenzene 0.00 0.00 0.00 0.00 0.00 0.00 1,2-Dichlorobenzene 0.00 0.00 0.00 0.00 0.00 0.00 1,3-Dichlorobenzene 0.00 0.00 0.00 0.00 0.00 0.00 1,4-Dichlorobenzene 0.00 0.00 0.00 0.00 0.00 0.00 4-Bromophenyl-Phenylether 0.00 0.00 0.00 0.00 0.00 0.00 4-Chlorophenyl-Phenylether 0.00 0.00 0.00 0.00 0.00 0.00 Acenaphthene 0.00 0.00 0.00 0.00 0.00 0.00 Acenaphthylene 0.00 0.00 0.00 0.00 0.00 0.00 Anthracene 0.00 0.00 0.00 0.00 0.00 0.00 Benzo(a)anthracene 0.00 0.00 0.00 0.00 0.00 0.00

Page 1 of 2 Table 2-9 Summary of Hazard Quotients for Food Web Exposures for Site 10 Average Exposure Dose Washington Navy Yard, Washington D.C.

American Robin Mourning Dove Gray Squirrel Chemical NOAEL LOAEL NOAEL LOAEL NOAEL LOAEL Benzo(a)pyrene 0.00 0.00 0.00 0.00 0.00 0.00 Benzo(b)fluoranthene 0.00 0.00 0.00 0.00 0.00 0.00 Benzo(g,h,i)perylene 0.00 0.00 0.00 0.00 0.00 0.00 Benzo(k)fluoranthene 0.00 0.00 0.00 0.00 0.00 0.00 Chrysene 0.00 0.00 0.00 0.00 0.00 0.00 Dibenz(a,h)anthracene 0.00 0.00 0.00 0.00 0.00 0.00 Fluoranthene 0.00 0.00 0.00 0.00 0.00 0.00 Fluorene 0.00 0.00 0.00 0.00 0.00 0.00 Hexachloro-1,3-butadiene 0.00 0.00 0.00 0.00 0.00 0.00 Hexachlorobenzene 0.22 0.02 0.02 0.00 0.00 0.00 Hexachlorocyclopentadiene 0.00 0.00 0.00 0.00 0.00 0.00 Hexachloroethane 0.00 0.00 0.00 0.00 0.00 0.00 Indeno(1,2,3-cd)pyrene 0.00 0.00 0.00 0.00 0.00 0.00 Pentachlorophenol 0.00 0.00 0.00 0.00 0.01 0.00 Phenanthrene 0.00 0.00 0.00 0.00 0.00 0.00 Pyrene 0.00 0.00 0.00 0.00 0.00 0.00 * Zinc HQs pertain to Quarters' A soil only NOAEL - no observed adverse effect level LOAEL - lowest observed adverse effect level

Page 2 of 2 Table u ar l gi al is ssess e e s Washington Navy Yard, Washington, D.C. e i al ur a e ila F ebb rga i s Aluminum X Beryllium X Chromium X Copper X Iron X Lead X X Mercury X Nickel X Silver X Thallium X Vanadium X Zinc X es i i es l l ri a e i e ls 4,4'-DDE X 4,4'-DDT X Dieldrin X Endosulfan II X Endosulfan sulfate X Heptachlor X gamma Chlordane X e i la ile rga i u s Butylbenzylphthalate X Di-n-butyl phthalate X Fluoranthene X Pyrene X bis(2-Ethylhexyl)phthalate X Notes: 1) Shaded cells indicate chemical was detected and exceeded screening based on average concentration. 2) Unshaded cells indicate screening value was unavailable for chemical.

3) Acetone, a known laboratory contaminant (USEPA, 1992) was not included. a - HQ exceedences for plants and lower trophic level receptors b - LOAEL-based HQ exceedences for upper trophic level receptors

Page 1 of 1 Figures File Path: v:\18gis\wny\figures\phaseII_ri.apr

LEGEND Figure 2-1 Washington Navy Yard Boundary Washington Navy Yard Location Map Site 10 Record of Decision N Washington Navy Yard 750 0 750 1500 Feet Modified from USGS 7.5 minute Washington, D.C. Washington East, Washington West, Alexandria, and Anacostia Quadrangles. 1" = 1500' CH2MHILL Figure 2-2

Site 10 Record of Decision 0 37.5 75150 Feet MSt. SE Legend

Navy Yard Boundary 209 H 61 60 Soil Excavated7 to Depths 2 Ranging from 1 to 4 feet

183 V A R L-1/ G F E D C L/M 169

Patt Warrington Ave 59

112 er

son Ave N P 2 122 a 0 rs o 3 O n s A 9t 105 Dahlgren v e hSt

21

157 Ave

B Figure 2-3 Leutze Extent of Removal Actions for Site 10 Park Site 10 Record of Decision 104 Washington Navy Yard 22 210 Washington, DC

MSt. SE MSt. SE

200 10 58 10th St 10th

S S 172

icard St. St. icard W y T Y 172 U 10th

76 1

73 .

St . . 70 57

220 NSt. 39 44 36 Primary Chemical Potential Source of Release Transport Exposure Exposure Exposure Primary Contamination Mechanisms Mechanisms Point Media Routes Receptor

Ingestion, Current/Future Resident, Leaching/Desorption Groundwater Flow On-site Groundwater Inhalation, and Industrial Worker, and Dermal Absorption Construction Worker

Surface Soil Ingestion, Current/Future Resident, Off-site Groundwater Inhalation, and Industrial Worker, and Dermal Absorption Construction Worker

Erosion Inhalation of Current/Future Industrial Worker, Volatile and Resident, Gardener, Recreational Onsite Air Particulate Adult/Child (Park), and Volatilization/ Wind Emissions Future Construction Worker (Bldg 1) Diffusion Inhalation of Current/Future Industrial Worker, Volatile and Resident, Gardener, Offsite Air Particulate and RecreationalAdult/Child (Park) Emissions

Inhalation of Current/Future Industrial Worker, Volatile and Resident, Gardener, Recreational Onsite Air Particulate Adult/Child (Park), and Soil Disturbance/ Emissions Future Construction Worker (Bldg 1) Wind Excavation Inhalation of Current/Future Industrial Worker, Volatile and Resident, Gardener, Offsite Air Particulate and RecreationalAdult/Child (Park) Emissions

Ingestion, Current/Future Industrial Worker, Direct Contact Exposed Dermal Resident, Gardener, Recreational Onsite with Surface Soil Material Absorption Adult/Child (Park), and Future Construction Worker (Bldg 1)

Inhalation of Current/Future Industrial Worker, Volatile and Resident, Gardener, Recreational Onsite Air Particulate Adult/Child (Park), and Volatilization/ Wind Emissions Future Construction Worker (Bldg 1) Diffusion Inhalation of Current/Future Industrial Worker, Volatile and Resident, Gardener, Offsite Air Particulate and RecreationalAdult/Child (Park) Emissions Subsurface Soil Inhalation of Current/Future Industrial Worker, Volatile and Resident, Gardener, and Onsite Air Particulate Other Recreational Adult/Child (Park) Wind Emissions Future Construction Worker (Bldg 1) Inhalation of Current/Future Industrial Worker, Volatile and Resident, Gardener, Offsite Air Excavation Exposing Particulate and RecreationalAdult/Child (Park) the Subsurface Soil Emissions

Ingestion, Current/Future Industrial Worker, Exposed Dermal Resident, Gardener, and Onsite Material Absorption Other Recreational Adult/Child (Park) Future Construction Worker (Bldg 1)

Leaching/Desorption (See Surface Soil)

Complete Pathway Incomplete Pathway

Figure 2-4 Conceptual Site Model for Potential Human Exposures Site 10 Record of Decision Washington Navy Yard ur e Tra s r a a s sure e ia sure u e e e rs

1) Lead paint chips

and lead from Dispersal by air ates / Plants Invertebr Insectivorous Birds Carnivorous Birds Herbivorous Mammals auto and other Direct Ingestion � � � � emissions Surface runoff (on-site) Surface Soil � � � � Direct Contact 2) Pesticide � � � application to Trophic Transfer lawn and garden areas Uptake/Accumulation

5 Figure e ual i e el r e ial l gi al sures ie e r e isi as i g a ar ei e er urre e MAR-12-2009 11:19 From:USTD To:35 DINR 703 378 8187 P.1/2

GOVERNMENT OF THE DISTRICT OF ([:0;~ UMHlA District Department of the Envirolllrien. ! * * * !, Office of lbe Oireolor Ii Ii i, :1 ii MAR 11 2000 II 'j !: !I :j Mr. James Burke, Director :,i! Hazaro()us Site Cleanup Divisilln (3TJSOO) :1,. U. S. EnvirOlilllcntal Protcctionl\geney Ii'; Region IJJ .' 1650 Arch Street ii Philadelphia, Pennsylvania 19109-2029 d . !I Rt:: Dislrict Dt:purtmt:nt ufthe Environment (DDOE) Cpn~rrenee on lhe Selected Remedy for Site 10, Wa~hingtOll Navy Yard, Washingt~n, DC, dated October 2008 (CERCLIS IDNo. DC9 I70024301) • Ii II Dear Mr. Burk.e: Ii" q Tht: District Dt:purtment or the Enviwnrncnt (DDOE) has reviewcd th~ FFA Draft Rccllro of Deei~ion (ROD) tor Site IO, Washington NnvyYard,. dat~d Oclubt;r 2R08. DDOE .concurs with the Navy's recommendatIon that further rcme

Il«_ili' ROO "ld"~ m.ly roil • SI" 10, DDOE', -~r~"" ""oil ", (I) the buildings.on Site 10, which include Quarters 1\ thrOUg~IH, K through P, R through W, Y and BUlldmg I; :I (2) the groundwater beneath Site 10, which is currcntly bcipg ~"Valuated as Operational Unit 1; and, ~ (3) the filllllaterial placed on the Washington Nuvy Yard Oycr period ofmany years, j which is currently being evaluated as part of a separate inv stigntion um!<:r Site Screening Area 12. I :1 DD0E notes that the conclusions ofthe risk assessment for Site 1<1 ar~ha<;Cl1 on lhe assumption lhattht: current uses or Site 10 will rt:main the same in the future and no not addre~s possiblc furure disturbances during construction or demolition. Tflm7.ardouh sll~Slanct:s, pollutants or contaminants are present on Site 10, construction or demolition aefivi I es could result in releases to the environment, including into the soil. . i :I I: :! Ii , " '.

51 N Street, N.F:., 6th I'lnnr, Washlngtnn, D.C. 2t111112 Teleph(,"e; (202) S3S-1~00 Fac.imil.: (202) 535-2881 www.green.dr..gov,111 i I MAR-12-2009 11:19 From:USTD To:36 DINA 703 378 8187 P.2/2

!; II Ii" Ii.. Mr. .lames Rurke !! Page 2 Ii10 . Ii Further, under Section 10.11 of the Federal Faeilitie~ Agreement,IDD9E's concurreucc does not preclude supplemental response action,; to remedy any continuing?c Jdditinnal releases oc thrcaL~ of release.s of hazardous substances, pollutants, or conl

ii·1 Ii iI

7J;(Ylt.Geo~e S. HaWKIIlS, t;sq. Director

cc: Carolyn Barley, DDOE ;; Armalia Berry-Washington, \\/NY "I: RObelt Stroud, USEPA, Region 111 II ,-" ;1"

"

"il !j ;; I 'I i!" I'd I! , I".1 "

'r!, iI I, I!

II, I Ii" II ei i e e al i ir a r il esul s TABLE B-1 Confirmatory Soil Sampling Results for Quarters E Washington Navy Yard Washington, D.C.

Quarters E

Back Yard - Sidewall Area Depth Lead Result Station ID Sample ID Sample Date Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled NONE NONE NONE NONE NONE NONE NONE NONE

Back Yard - Base Area Depth Lead Result Station ID Sample ID Sample Date Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DP191 WS10-DS191-02 10/27/2003 2 397 Pass No WS10-DP192 WS10-DS192-02 10/27/2003 2 58 Pass No WS10-DP193 WS10-DS193-02 10/27/2003 2 380 Pass No WS10-DP194 WS10-DS194-02 10/27/2003 2 181 Pass No

Front Yard - Sidewall Area Depth Lead Result Station ID Sample ID Sample Date Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DP196 WS10-DS196-00.5 10/30/2003 0.5 440 Fail Yes WS10-DS208-00.75 WS10-DS209-00.75 WS10-DS210-00.75 WS10-DP208 WS10-DS208-00.75 11/4/2003 0.75 450 Fail Yes WS10-DS211-00.75 WS10-DP209 WS10-DS209-00.75 11/6/2003 0.75 320 Pass No WS10-DP210 WS10-DS210-00.75 11/6/2003 0.75 360 Pass No WS10-DP211 WS10-DS211-00.75 11/6/2003 0.75 340 Pass No

Front Yard - Base Area Depth Lead Result Station ID Sample ID Sample Date Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DP195 WS10-DS195-01 10/30/2003 1 500 Fail Yes WS10-DS195-01.5 WS10-DP195 WS10-DS195-01.5 11/4/2003 1.5 180 Pass No WS10-DP197 WS10-DS197-01 10/30/2003 1 410 Fail Yes WS10-DS197-01.5 WS10-DP197 WS10-DS197-01.5 11/4/2003 1.5 330 Pass No WS10-DP207 WS10-DS207-02 10/30/2003 2 17 Pass No

Exceedance of 400 ppm EPA Child Soil Screening Criteria Value for Lead (Soil was subsequently excavated) bgs = below original, pre-excavation ground surface WS10-DS196-00.5 - Soil sample removed during excavation.

Page 1 of 1 TABLE B-2 Confirmatory Soil Sampling Results for Quarters F Washington Navy Yard Washington, D.C.

Quarters F

Back Yard - Sidewall Area Depth Lead Result Station ID Sample ID Sample Date Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DP188 WS10-DS188-00.5 11/3/2003 0.5 540 Fail Yes WS10-DS216-01 WS10-DP190 WS10-DS190-00.5 11/3/2003 0.5 405 Fail Yes WS10-DS212-00.5 WS10-DP212 WS10-DS212-00.5 11/6/2003 0.5 420 Fail Yes Full Excavation

Back Yard - Base Area Depth Lead Result Station ID Sample ID Sample Date Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DP186 WS10-DS186-01 11/3/2003 1 260 Pass No WS10-DP189 WS10-DS189-00 10/20/2000 0 203 Pass No WS10-DP216 WS10-DS216-01 11/14/2003 1 350 Pass No

Front Yard - Sidewall Area Depth Lead Result Station ID Sample ID Sample Date Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DS215-00.5 WS10-DP198 WS10-DS198-00.5 11/6/2003 0.5 440 Fail Yes WS10-DS213-00.5 WS10-DS214-00.5 WS10-DP215 WS10-DS215-00.5 11/14/2003 0.5 340 Pass No WS10-DP213 WS10-DS213-00.5 11/10/2003 0.5 310 Pass No WS10-DP214 WS10-DS214-00.5 11/10/2003 0.5 280 Pass No

Front Yard - Base Area Depth Lead Result Station ID Sample ID Sample Date Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DP206 WS10-DS206-02 11/6/2003 2 63 Pass No WS10-DP200 WS10-DS200-01 11/6/2003 1 70 Pass No WS10-DP199 WS10-DS199-01 11/6/2003 1 170 Pass No

Exceedance of 400 ppm EPA Child Soil Screening Criteria Value for Lead (Soil was subsequently excavated) Full Excavation = Excavation areas was excavated laterally to fullest extent possible (excavation encountered wall defining the northern boundary of the Quarters F Back Yard and the WNY). bgs = below original, pre-excavation ground surface

Page 1 of 1 TABLE B-3 Confirmatory Soil Sampling Results for Quarters G Washington Navy Yard Washington, D.C.

Quarters G

Back Yard - Sidewall Area Depth Lead Result Station ID Sample ID Sample Date Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled NONE NONE NONE NONE NONE NONE NONE NONE

Back Yard - Base Area Depth Lead Result Station ID Sample ID Sample Date Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DP187 WS10-DS187-02 11/13/2003 2 530 Fail Yes WS10-DS187-02.5 WS10-DP187 WS10-DS187-02.5 11/18/2003 2.5 560* Fail No WS10-DP185 WS10-DS185-01 11/13/2003 1 370 Pass No WS10-DP184 WS10-DS184-01 11/13/2003 1 480 Fail Yes WS10-DS184-01.5 WS10-DP184 WS10-DS184-01.5 11/18/2003 1.5 170 Pass No WS10-DP183 WS10-DS183-01 11/13/2003 1 420 Fail Yes WS10-DS183-01.5 WS10-DP183 WS10-DS183-01.5 11/18/2003 1.5 310 Pass No WS10-DP182 WS10-DS182-02 11/13/2003 2 49 Pass No

Front Yard - Sidewall Area Depth Lead Result Station ID Sample ID Sample Date Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled NONE NONE NONE NONE NONE NONE NONE NONE

Front Yard - Base Area Depth Lead Result Station ID Sample ID Sample Date Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DP205 WS10-DS205-02 11/12/2003 2 630 Fail Yes WS10-DS217-03 WS10-DP217 WS10-DS217-03 11/14/2003 3 6.8 Pass No WS10-DP201 WS10-DS201-01 11/12/2003 1 200 Pass No WS10-DP202 WS10-DS202-01 11/12/2003 1 44 Pass No WS10-DP203 WS10-DS203-01 11/12/2003 1 340 Pass No WS10-DP204 WS10-DS204-02 11/12/2003 2 240 Pass No

Exceedance of 400 ppm EPA Child Soil Screening Criteria Value for Lead (Soil was subsequently excavated) bgs = below original, pre-excavation ground surface * = Even though this sample failed, it was not resampled due to the inability to excavate the area any deeper caused by a large tree root obstructing the excavation area (Shaw, 2004). WS10-DS196-00.5 - Soil sample removed during excavation.

Page 1 of 1 TABLE B-4 Confirmatory Soil Sampling Results for Quarters L-1, L, and M Washington Navy Yard, Washington, D.C.

Quarters L-1, L, M

Back Yard - Sidewall Lead Area Depth Station ID Sample ID Sample Date Result Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DP228 WS10-DS228-01.5 7/1/2004 1.5 350 Pass No WS10-DP229 WS10-DS229-00.5 7/1/2004 0.5 190 Pass No

Back Yard - Base Lead Area Depth Station ID Sample ID Sample Date Result Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DP219 WS10-DS219-02 7/1/2004 2.0 720 Fail Yes WS10-DS219-03 WS10-DP219 WS10-DS219-03 7/16/2004 3.0 340 Pass No WS10-DP220 WS10-DS220-01 7/1/2004 1.0 670 Fail Yes WS10-DS220-02 WS10-DP220 WS10-DS220-02 7/16/2004 2.0 120 Pass No WS10-DP221 WS10-DP221-02 7/1/2004 2.0 210 Pass No WS10-DP222 WS10-DP222-02 7/1/2004 2.0 270 Pass No WS10-DP234 WS10-DP234-03 7/16/2004 3.0 46 Pass No WS10-DP235 WS10-DP235-03 7/16/2004 3.0 4.4 Pass No

Front Yard - Sidewall Lead Area Depth Station ID Sample ID Sample Date Result Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DP230 WS10-DS230-00.5 7/22/2004 0.5 82 Pass No WS10-DP231 WS10-DS231-00.5 7/22/2004 0.5 240 Pass No WS10-DP232 WS10-DS232-00.5 7/22/2004 0.5 380 Pass No WS10-DP233 WS10-DS233-00.5 7/22/2004 1.5 300 Pass No

Front Yard - Base Lead Area Depth Station ID Sample ID Sample Date Result Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DP218 WS10-DS218-00* 6/21/2004 0.0 - 0.5 290 Pass No WS10-DP218 WS10-DS218-01* 6/21/2004 1.0 - 1.5 300 Pass No WS10-DP223 WS10-DS223-01 7/22/2004 1.0 68 Pass No WS10-DP224 WS10-DS224-01 7/22/2004 1.0 140 Pass No WS10-DP225 WS10-DS225-01 7/22/2004 1.0 120 Pass No WS10-DP226 WS10-DS226-02 7/22/2004 2.0 340 Pass No WS10-DP227 WS10-DS227-02 7/22/2004 2.0 290 Pass No

Exceedance of 400 ppm USEPA Child Soil Screening Criteria for Lead (Soil was subsequently excavated) bgs = below original, pre-excavation ground surface * = preconfirmatory soil samples - soil collected prior to removal actions to better determine vertical and horizontal extent of excavations.

Page 1 of 1 TABLE B-5 Confirmatory Soil Sampling Results for Quarters V Washington Navy Yard, Washington, D.C.

Quarters V

Back Yard - Sidewall Lead Area Depth Station ID Sample ID Sample Date Result Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DP244 WS10-DS244-02.5 7/16/2004 2.5 170 Pass No

Back Yard - Base Lead Area Depth Station ID Sample ID Sample Date Result Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DP236 WS10-DP236-03 7/16/2004 3.0 12 Pass No WS10-DP237 WS10-DP237-02 7/16/2004 2.0 88 Pass No WS10-DP238 WS10-DP238-02 7/16/2004 2.0 190 Pass No WS10-DP239 WS10-DP239-02 7/16/2004 2.0 180 Pass No

Front Yard - Sidewall Lead Area Depth Station ID Sample ID Sample Date Result Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled NONE

Front Yard - Base Lead Area Depth Station ID Sample ID Sample Date Result Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DP240 WS10-DS240-01 7/22/2004 1.0 11 Pass No WS10-DP241 WS10-DS241-01 7/22/2004 1.0 96 Pass No WS10-DP242 WS10-DS242-01 7/22/2004 1.0 19 Pass No WS10-DP243 WS10-DS243-01 7/22/2004 1.0 85 Pass No bgs = below original, pre-excavation ground surface

Page 1 of 1 TABLE B-6 Confirmatory Soil Sampling Results for Quarters D Washington Navy Yard, Washington, D.C.

Quarters D

Back Yard - Sidewall Lead Area Depth Station ID Sample ID Sample Date Result Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DP254 WS10-DS254-01.5 8/25/2004 1.5 3.2 Pass No WS10-DS255 WS10-DS255-01.5 8/25/2004 1.5 ND Pass No

Back Yard - Base Lead Area Depth Station ID Sample ID Sample Date Result Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DP245 WS10-DS245-02 8/25/2004 2.0 42 Pass No WS10-DP246 WS10-DS246-02 8/25/2004 2.0 27 Pass No WS10-DP247 WS10-DS247-02 8/25/2004 2.0 35 Pass No WS10-DP248 WS10-DS248-01 8/25/2004 1.0 10 Pass No WS10-DP249 WS10-DS249-01 8/25/2004 1.0 15 Pass No

Front Yard - Sidewall Lead Area Depth Station ID Sample ID Sample Date Result Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DP256 WS10-DS256-02.0 8/9/2004 2.0 42 Pass No

Front Yard - Base Lead Area Depth Station ID Sample ID Sample Date Result Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DP250 WS10-DS250-03 8/9/2004 3.0 270 Pass No WS10-DP251 WS10-DS251-03 8/9/2004 3.0 110 Pass No WS10-DP252 WS10-DS252-01 8/9/2004 1.0 160 Pass No WS10-DP253 WS10-DS253-01 8/9/2004 1.0 260 Pass No

ND = Not Detected at a concentration greater than or equal to the practical quantitation limit (PQL) bgs = below original, pre-excavation ground surface

Page 1 of 1 TABLE B-7 Confirmatory Soil Sampling Results for Quarters N Washington Navy Yard, Washington, D.C.

Quarters N

Back Yard - Sidewall Lead Area Depth Station ID Sample ID Sample Date Result Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DS304 WS10-DS304-00.5 5/17/2005 0.5 420 Fail Yes WS10-DS315-01 WS10-DS305 WS10-DS305-00.5 5/17/2005 0.5 490 Fail Yes WS10-DS314-01 WS10-DS314 WS10-DS314-01 5/26/2005 1.0 510 Fail Yes WS10-DS318-02 WS10-DS315 WS10-DS315-01 5/23/2005 1.0 100 Pass No WS10-DS316 WS10-DS316-1.5 5/26/2005 1.5 40 Pass No WS10-DS318 WS10-DS318-02 5/26/2005 2.0 120 Pass No

Back Yard - Base Lead Area Depth Station ID Sample ID Sample Date Result Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DS292 WS10-DS292-01 5/17/2005 1.0 470 Fail Yes WS10-DS292-02 WS10-DS292 WS10-DS292-02 5/23/2005 2.0 56 Pass No WS10-DS293 WS10-DS293-01 5/17/2005 1.0 150 Pass No WS10-DS294 WS10-DS294-01 5/17/2005 1.0 440 Fail Yes WS10-DS294-02 WS10-DS294 WS10-DS294-02 5/23/2005 2.0 1900 Fail Yes WS10-DS294-04 WS10-DS294 WS10-DS294-04 5/26/2005 4.0 41 Pass No WS10-DS317 WS10-DS317-04 5/26/2005 4.0 420 Fail No See Note

Front Yard - Sidewall Lead Area Depth Station ID Sample ID Sample Date Result Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DS302 WS10-DS302-00.5 5/6/2005 0.5 360 Pass No WS10-DS303 WS10-DS303-00.5 5/7/2005 0.5 250 Pass No

Front Yard - Base Lead Area Depth Station ID Sample ID Sample Date Result Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DS282 WS10-DS282-01 5/16/2005 1.0 42 Pass

Exceedance of 400 ppm USEPA Child Soil Screening Criteria for Lead (Soil was subsequently excavated) bgs = below original, pre-excavation ground surface WS10-DS317-04 - Due to potential instability of the excavate area, further excavation was not conducted.

Page 1 of 1 TABLE B-8 Confirmatory Soil Sampling Results for Quarters O Washington Navy Yard, Washington, D.C.

Quarters O

Back Yard - Sidewall Lead Area Depth Station ID Sample ID Sample Date Result Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DS306 WS10-DS306-00.5 5/17/2005 0.5 380 Pass No WS10-DS307 WS10-DS307-00.5 5/17/2005 0.5 460 Fail Yes WS10-DS313-00.5 WS10-DS308 WS10-DS308-00.5 5/17/2005 0.5 310 Pass No WS10-DS309 WS10-DS309-00.5 5/17/2005 0.5 160 Pass No WS10-DS310 WS10-DS310-00.5 5/17/2005 0.5 2800 Fail Yes WS10-DS312-00.5 WS10-DS311 WS10-DS311-00.5 5/17/2005 0.5 74 Pass No WS10-DS312 WS10-DS312-00.5 5/20/2005 0.5 23 Pass No WS10-DS313 WS10-DS313-00.5 5/20/2005 0.5 350 Pass No WS10-DS319 WS10-DS319-00.5 6/6/2005 0.5 78 Pass No

Back Yard - Base Lead Area Depth Station ID Sample ID Sample Date Result Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DS280 WS10-DS280-00* 4/25/2005 0.0 690 Fail Yes WS10-DS299-01 WS10-DS281 WS10-DS281-00* 4/25/2005 0.0 460 Fail Yes WS10-DS300-01 WS10-DS286 WS10-DS286-01 5/12/2005 1.0 330 Pass No WS10-DS287 WS10-DS287-02 5/17/2005 2.0 320 Pass No WS10-DS288 WS10-DS288-00.5 5/12/2005 0.5 360 Pass No WS10-DS289 WS10-DS289-02 5/12/2005 2.0 9.6 Pass No WS10-DS290 WS10-DS290-02 5/12/2005 2.0 18 Pass No WS10-DS291 WS10-DS291-02 5/26/2005 2.0 29 Pass No WS10-DS295 WS10-DS295-01 5/17/2005 1.0 120 Pass No WS10-DS296 WS10-DS296-01 5/17/2005 1.0 140 Pass No WS10-DS297 WS10-DS297-01 5/17/2005 1.0 120 Pass No WS10-DS298 WS10-DS298-01 5/17/2005 1.0 350 Pass No WS10-DS299 WS10-DS299-01 6/6/2005 1.0 220 Pass No WS10-DS300 WS10-DS300-01 6/6/2005 1.0 200 Pass No WS10-DS301 WS10-DS301-01 6/6/2005 1.0 140 Pass No

Front Yard - Sidewall Lead Area Depth Station ID Sample ID Sample Date Result Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled None

Front Yard - Base Lead Area Depth Station ID Sample ID Sample Date Result Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DS283 WS10-DS283-01 5/6/2005 1.0 79 Pass No WS10-DS284 WS10-DS284-01 5/6/2005 1.0 230 Pass No WS10-DS285 WS10-DS285-01 5/6/2005 1.0 450 Fail Yes WS10-DS285-02 WS10-DS285 WS10-DS285-02 5/17/2005 2.0 110 Pass No

Exceedance of 400 ppm USEPA Child Soil Screening Criteria for Lead (Soil was subsequently excava bgs = below original, pre-excavation ground surface *= preconfirmatory soil samples - soil samples collected prior to removal actions to better determine vertical and horizontal extent of excavations.

Page 1 of 1 TABLE B-9 Confirmatory Soil Sampling Results for Quarters H Washington Navy Yard, Washington, D.C.

Quarters H

Front Yard - Sidewall Lead Area Depth Station ID Sample ID Sample Date Result Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DS331 WS10-DS331-00.5 6/13/2005 0.5 250 Pass No WS10-DS332 WS10-DS332-00.5 6/13/2005 0.5 410 Fail Yes WS10-DS341-00.5 WS10-DS333 WS10-DS333-01 6/15/2005 1.0 620 Fail Yes WS10-DS342-01 WS10-DS334 WS10-DS334-01 6/15/2005 1.0 530 Fail Yes WS10-DS343-01.5 WS10-DS341 WS10-DS341-00.5 6/21/2005 0.5 330 Pass No WS10-DS342 WS10-DS342-01 6/21/2005 1.0 150 Pass No WS10-DS343 WS10-DS343-01.5 6/21/2005 1.5 330 Pass No

Front Yard - Base Lead Area Depth Station ID Sample ID Sample Date Result Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DS320 WS10-DS320-02 6/15/2005 2.0 410 Fail Yes WS10-DS320-03 WS10-DS320 WS10-DS320-03 6/21/2005 3.0 11 Pass No WS10-DS321 WS10-DS321-01 6/13/2005 1.0 190 Pass No WS10-DS322 WS10-DS322-01 6/13/2005 1.0 43 Pass No WS10-DS335 WS10-DS335-02 6/15/2005 2.0 49 Pass No

Exceedance of 400 ppm USEPA Child Soil Screening Criteria for Lead (Soil was subsequently excavated) bgs = below original, pre-excavation ground surface

Page 1 of 1 TABLE B-10 Confirmatory Soil Sampling Results for Quarters R Washington Navy Yard, Washington, D.C.

Quarters R

Back Yard - Sidewall Lead Area Depth Station ID Sample ID Sample Date Result Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DS325 WS10-DS325-00.5 6/20/2005 0.5 710 Fail Yes WS10-DS344 WS10-DS326 WS10-DS326-00.5 6/20/2005 0.5 190 Pass No WS10-DS344 WS10-DS344-00.5 6/24/2005 0.5 86 Pass No

Back Yard - Base Lead Area Depth Station ID Sample ID Sample Date Result Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DS277 WS10-DS277-00* 4/25/2005 0.00 370 Pass No WS10-DS278 WS10-DS278-00* 4/26/2005 0.00 270 Pass No WS10-DS279 WS10-DS279-00* 4/27/2005 0.00 630 Fail Yes WS10-DS324-01 WS10-DS323 WS10-DS323-01 6/20/2005 1.00 360 Pass No WS10-DS324 WS10-DS324-01 6/20/2005 1.00 520 Fail Yes WS10-DS324-02 WS10-DS324 WS10-DS324-02 6/24/2005 2.00 29 Pass No

Front Yard - Sidewall Lead Area Depth Station ID Sample ID Sample Date Result Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DS327 WS10-DS327-00.5 6/24/2005 0.5 44 Pass No WS10-DS328 WS10-DS328-01 6/22/2005 1.0 240 Pass No WS10-DS329 WS10-DS329-00.5 6/22/2005 0.5 410 Fail Yes WS10-DS345-00.5 WS10-DS330 WS10-DS330-00.5 6/22/2005 0.5 310 Pass No WS10-DS345 WS10-DS345-00.5 6/24/2005 0.5 380 Pass No

Front Yard - Base Lead Area Depth Station ID Sample ID Sample Date Result Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DS336 WS10-DS336-01 6/24/2005 1.0 150 Pass No WS10-DS337 WS10-DS337-02 6/28/2005 2.0 1400 Fail Yes WS10-DS337-03 WS10-DS337 WS10-DS337-03 7/7/2005 3.0 1100 Fail Yes WS10-DS337-04 WS10-DS337 WS10-DS337-04 7/14/2005 4.0 90 Pass No WS10-DS338 WS10-DS338-01 6/28/2005 1.0 7700 Fail Yes WS10-DS338-02 WS10-DS338 WS10-DS338-02 7/7/2005 2.0 9.7 Pass No WS10-DS339 WS10-DS339-02 6/15/2005 2.0 340 Pass No WS10-DS340 WS10-DS340-01 6/22/2005 1.0 400 Pass No

Exceedance of 400 ppm USEPA Child Soil Screening Criteria for Lead (Soil was subsequently excavated) bgs = below original, pre-excavation ground surface * = preconfirmatory soil samples - soil samples collected prior to removal actions to better determine vertical and horizontal extent of excavations.

Page 1 of 1 TABLE B-11 Confirmatory Soil Sampling Results for Building 1 Washington Navy Yard, Washington, D.C.

Building 1

North Yard - Sidewall Lead Depth Area Excavated Station ID Sample ID Sample Date Result Pass/Fail Resample ID (ft. bgs) & Resampled (mg/kg) WS10-DS272 WS10-DS272-01 10/25/2004 1.0 9.9 Pass No

North Yard - Base Lead Depth Area Excavated Station ID Sample ID Sample Date Result Pass/Fail Resample ID (ft. bgs) & Resampled (mg/kg) WS10-DS263 WS10-DS263-02 10/25/2004 2.0 12 Pass No WS10-DS264 WS10-DS264-02 10/22/2004 2.0 340 Pass No WS10-DS265 WS10-DS265-02 10/23/2004 2.0 81 Pass No WS10-DS266 WS10-DS266-02 10/25/2004 2.0 150 Pass No WS10-DS267 WS10-DS267-01 10/26/2004 1.0 120 Pass No

East Yard - Sidewall Lead Depth Area Excavated Station ID Sample ID Sample Date Result Pass/Fail Resample ID (ft. bgs) & Resampled (mg/kg) WS10-DS347 WS10-DS347-00.5 7/26/2005 0.5 75 Pass No

East Yard - Base Lead Depth Area Excavated Station ID Sample ID Sample Date Result Pass/Fail Resample ID (ft. bgs) & Resampled (mg/kg) WS10-DS260 WS10-DS260-00* 8/18/2004 0.0 330 Pass No WS10-DS261 WS10-DS261-00* 8/19/2004 0.0 700 Fail Yes WS10-DS346-01 WS10-DS262 WS10-DS262-00* 8/20/2004 0.0 110 Pass No WS10-DS346 WS10-DS346-01 7/26/2005 1.0 42 Pass No

South Yard - Sidewall Lead Depth Area Excavated Station ID Sample ID Sample Date Result Pass/Fail Resample ID (ft. bgs) & Resampled (mg/kg) WS10-DS273 WS10-DS273-01 10/28/2004 1.0 28 Pass No WS10-DS274 WS10-DS274-01 10/29/2004 1.0 58 Pass No WS10-DS275 WS10-DS275-01 11/3/2004 1.0 56 Pass No WS10-DS276 WS10-DS276-01 11/4/2004 1.0 110 Pass No

South Yard - Base Lead Depth Area Excavated Station ID Sample ID Sample Date Result Pass/Fail Resample ID (ft. bgs) & Resampled (mg/kg) WS10-DS268 WS10-DS268-01 10/28/2004 1.0 580 Fail Yes WS10-DS268-02 WS10-DS268 WS10-DS268-02 11/3/2004 2.0 64 Pass No WS10-DS269 WS10-DS269-01 10/28/2004 1.0 22 Pass No WS10-DS270 WS10-DS270-01 11/3/2004 1.0 170 Pass No WS10-DS271 WS10-DS271-01 11/4/2004 1.0 180 Pass No

Exceedance of 400 ppm USEPA Child Soil Screening Criteria for Lead (Soil was subsequently excava bgs = below original, pre-excavation ground surface * = preconfirmatory soil samples - soil samples collected prior to removal actions to better determine vertical and horizontal extent of excavations.

Page 1 of 1 TABLE B-12 Confirmatory Soil Sampling Results for Quarters C Washington Navy Yard, Washington, D.C.

Quarters C

Back Yard - Base Lead Area Depth Station ID Sample ID Sample Date Result Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DS349 WS10-DS349-01 7/25/2006 1.0 260 Pass No WS10-DS350 WS10-DS350-02 7/27/2006 2.0 97 Pass No

Front Yard - Base Lead Area Depth Station ID Sample ID Sample Date Result Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DS351 WS10-DS351-01 7/31/2006 1.0 3700 Fail Yes WS10-DS351-03 WS10-DS351 WS10-DS351-03 8/8/2006 3.0 140 Pass No WS10-DS352 WS10-DS352-01 7/31/2006 1.0 550 Fail Yes WS10-DS352-02 WS10-DS352 WS10-DS352-02 8/8/2006 2.0 190 Pass No WS10-DS353 WS10-DS353-01 7/31/2006 1.0 470 Fail Yes WS10-DS353-02 WS10-DS353 WS10-DS353-02 8/8/2006 2.0 430 Fail Yes WS10-DS353-03 WS10-DS353 WS10-DS353-03 8/10/2006 3.0 86 Pass No WS10-DS354 WS10-DS354-01 7/31/2006 1.0 640 Fail Yes WS10-DS354-02 WS10-DS354 WS10-DS354-02 8/8/2006 2.0 54 Pass No

Front Yard - Sidewall Lead Area Depth Station ID Sample ID Sample Date Result Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DS404 WS10-DS404-00.5 7/31/2006 0.5 200 Pass No

Exceedance of 400 ppm USEPA Child Soil Screening Criteria for Lead (Soil was subsequently excavated) bgs = below original, pre-excavation ground surface

Page 1 of 1 TABLE B-13 Confirmatory Soil Sampling Results for Building 2 Washington Navy Yard, Washington, D.C.

Building 2

Front Yard - Base Lead Area Depth Station ID Sample ID Sample Date Result Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DS355 WS10-DS355-02 8/21/2006 2.0 380 Pass No WS10-DS356 WS10-DS356-02 8/21/2006 2.0 330 Pass No WS10-DS357 WS10-DS357-01 8/21/2006 1.0 84 Pass No WS10-DS358 WS10-DS358-01 8/23/2006 1.0 43 Pass No WS10-DS359 WS10-DS359-01 9/13/2006 1.0 210 Pass No WS10-DS360 WS10-DS360-01 9/13/2006 1.0 330 Pass No WS10-DS361 WS10-DS361-01 9/13/2006 1.0 220 Pass No WS10-DS362 WS10-DS362-01 9/13/2006 1.0 550 Fail Yes WS10-DS362-02 WS10-DS362 WS10-DS362-02 9/20/2006 2.0 14 Pass No WS10-DS363 WS10-DS363-02 9/20/2006 2.0 110 Pass No WS10-DS364 WS10-DS364-02 9/20/2006 2.0 52 Pass No WS10-DS409 WS10-DS409-00.5* 9/13/2006 0.5 1200 Fail Yes WS10-DS409-03 WS10-DS409 WS10-DS409-02* 9/13/2006 2.0 1500 Fail Yes WS10-DS409-03 WS10-DS409 WS10-DS409-03 9/21/2006 3.0 103 Pass No WS10-DS410 WS10-DS410-03 9/20/2006 3.0 26 Pass No

Front Yard - Sidewall Lead Area Depth Station ID Sample ID Sample Date Result Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DS395 WS10-DS395-01 9/20/2006 1.0 380 Pass No WS10-DS396 WS10-DS396-01 9/20/2006 1.0 130 Pass No WS10-DS403 WS10-DS403-00.5 8/23/2006 0.5 230 Pass No

Exceedance of 400 ppm USEPA Child Soil Screening Criteria for Lead (Soil was subsequently excavated) bgs = below original, pre-excavation ground surface * = preconfirmatory soil samples - soil samples collected prior to removal actions to better determine vertical and horizontal extent of excavations.

Page 1 of 1 TABLE B-14 Confirmatory Soil Sampling Results for Quarters A Washington Navy Yard, Washington, D.C.

Quarters A

Back Yard - Base Lead Area Depth Station ID Sample ID Sample Date Result Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DS348 WS10-DS348-00.5* 7/11/2006 0.5 130 Pass No WS10-DS348 WS10-DS348-02* 7/11/2006 2.0 140 Pass No

Back Yard - Sidewall Lead Area Depth Station ID Sample ID Sample Date Result Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled None N/A N/A N/A N/A N/A N/A N/A

West Side - Base Lead Area Depth Station ID Sample ID Sample Date Result Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DS365 WS10-DS365-01 10/9/2006 1.0 E790 Fail Yes WS10-DS365-02 WS10-DS365 WS10-DS365-02 10/18/2006 2.0 240 Pass No WS10-DS366 WS10-DS366-01 10/9/2006 1.0 600 Fail Yes WS10-DS366-02 WS10-DS366 WS10-DS366-02 10/18/2006 2.0 11 Pass No

West Side - Sidewall Lead Area Depth Station ID Sample ID Sample Date Result Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled None N/A N/A N/A N/A N/A N/A N/A

Front Yard - Base Lead Area Depth Station ID Sample ID Sample Date Result Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DS367 WS10-DS367-01 10/9/2006 1.0 340 Pass No WS10-DS368 WS10-DS368-01 10/9/2006 1.0 170 Pass No WS10-DS369 WS10-DS369-01 12/6/2006 1.0 400 Pass No WS10-DS370 WS10-DS370-01 10/9/2006 1.0 140 Pass No WS10-DS371 WS10-DS371-01 10/9/2006 1.0 280 Pass No

Front Yard - Sidewall Lead Area Depth Station ID Sample ID Sample Date Result Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DS397 WS10-DS397-00.5 10/9/2006 0.5 140 Pass No WS10-DS398 WS10-DS398-00.5 10/9/2006 0.5 420 Fail Yes WS10-DS411-00.5 WS10-DS411 WS10-DS411-00.5 10/18/2006 0.5 320 Pass No

East Side - Base Lead Area Depth Station ID Sample ID Sample Date Result Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DS372 WS10-DS372-01 10/18/2006 1.0 35 Pass No WS10-DS373 WS10-DS373-01 10/9/2006 1.0 360 Pass No WS10-DS374 WS10-DS374-01 8/10/2006 1.0 1200 Fail Yes WS10-DS374-02 WS10-DS374 WS10-DS374-02 8/15/2006 2.0 47 Pass No WS10-DS375 WS10-DS375-01 11/28/2006 1.0 490 Fail Yes WS10-DS375-02 WS10-DS375 WS10-DS375-02 12/4/2006 2.0 12 Pass No WS10-DS376 WS10-DS376-01 11/28/2006 1.0 650 Fail Yes WS10-DS376-02 WS10-DS376 WS10-DS376-02 12/4/2006 2.0 16 Pass No Navy advised to dig as much soil WS10-DS377 WS10-DS377-01 10/31/1901 1.0 670 Fail No from around Magnolia tree as possible - resample was not taken WS10-DS378 WS10-DS378-01 11/28/2006 1.0 960 Fail Yes WS10-DS378-02 WS10-DS378 WS10-DS378-02 12/4/2006 2.0 27 Pass No WS10-DS379 WS10-DS379-01 12/6/2006 1.0 310 Pass No WS10-DS380 WS10-DS380-02 12/6/2006 2.0 120 Pass No WS10-DS381 WS10-DS381-02 11/28/2006 2.0 780 Fail Yes WS10-DS381-03 WS10-DS381 WS10-DS381-03 12/4/2006 3.0 19 Pass No WS10-DS382 WS10-DS382-01 10/24/2006 1.0 5.2 Pass No WS10-DS383 WS10-DS383-01 10/24/2006 1.0 410 Fail Yes WS10-DS383-02 WS10-DS383 WS10-DS383-02 11/1/2006 2.0 77 Pass No WS10-DS384 WS10-DS384-01 10/18/2006 1.0 5.8 Pass No WS10-DS385 WS10-DS385-01 10/18/2006 1.0 480 Fail Yes WS10-DS385-02 WS10-DS385 WS10-DS385-02 11/1/2006 2.0 190 Pass No WS10-DS386 WS10-DS386-02 11/1/2006 2.0 120 Pass No WS10-DS387 WS10-DS387-01 11/1/2006 1.0 440 Fail Yes WS10-DS387-02 WS10-DS387 WS10-DS387-02 11/7/2006 2.0 75 Pass No WS10-DS388 WS10-DS388-01 11/1/2006 1.0 280 Pass No WS10-DS389 WS10-DS389-01 11/1/2006 1.0 290 Pass No WS10-DS390 WS10-DS390-02 11/7/2006 2.0 47 Pass No WS10-DS391 WS10-DS391-02 8/17/2006 2.0 390 Pass No WS10-DS392 WS10-DS392-01 12/4/2006 1.0 350 Pass No WS10-DS393 WS10-DS393-01 12/4/2006 1.0 480 Fail Yes WS10-DS393-02 WS10-DS393 WS10-DS393-02 12/6/2006 2.0 810 Fail Yes WS10-DS393-03 WS10-DS393 WS10-DS393-03 12/8/2006 3.0 18 Pass No WS10-DS394 WS10-DS394-01 8/10/2006 1.0 300 Pass No

East Side - Sidewall Lead Area Depth Station ID Sample ID Sample Date Result Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DS399 WS10-DS399-01 11/28/2006 1.0 110 Pass No WS10-DS400 WS10-DS400-00.5 12/4/2006 0.5 260 Pass No Additional excavation (to two feet bgs) required in the area of WS10- DS387 removed WS10-DS401 location. Additional sidewall WS10-DS401 WS10-DS401-01 11/1/2006 1.0 470 Fail Yes confirmatory soil sample not required. “Pass” confirmation is documented by base sample WS10-DS387-02 WS10-DS402 WS10-DS402-01 11/7/2006 1.0 370 Pass No WS10-DS405 WS10-DS405-01 11/7/2006 1.0 400 Pass No WS10-DS406 WS10-DS406-01 8/15/2006 1.0 75 Pass No WS10-DS407 WS10-DS407-01 8/17/2006 1.0 270 Pass No WS10-DS408 WS10-DS408-01 8/15/2006 1.0 50 Pass No

Exceedance of 400 ppm USEPA Child Soil Screening Criteria for Lead (Soil was subsequently excavated) bgs = below original, pre-excavation ground surface * = preconfirmatory soil samples - soil samples collected prior to removal actions to better determine vertical and horizontal extent of excavations.

Page 1 of 1 TABLE B-15 Confirmatory Soil Sampling Results for Leutze Park Washington Navy Yard, Washington, D.C.

Admiral Leutze Park

Sidewall Lead Area Depth Station ID Sample ID Sample Date Result Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DS417 WS10-DS417-00.5 1/5/2007 0.5 350 Pass No WS10-DS418 WS10-DS418-00.5 1/5/2007 0.5 260 Pass No WS10-DS419 WS10-DS419-00.5 1/5/2007 0.5 340 Pass No

Base Lead Area Depth Station ID Sample ID Sample Date Result Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DS420 WS10-DS420-01 1/5/2007 1.0 330 Pass No

Exceedance of 400 ppm USEPA Child Soil Screening Criteria for Lead bgs = below original, pre-excavation ground surface

Page 1 of 1 TABLE B-16 Confirmatory Soil Sampling Results for Quarters B Washington Navy Yard, Washington, D.C.

Quarters B

Rose Garden - Sidewall Lead Area Depth Station ID Sample ID Sample Date Result Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DS457 WS10-DS457-00.5 2/21/2007 0.5 290 Pass No

Rose Garden - Base Lead Area Depth Station ID Sample ID Sample Date Result Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DS412 WS10-DS412-00.5* 1/5/2007 0.5 430 Fail Yes WS10-DS412-01A WS10-DS412 WS10-DS412-01* 1/5/2007 1.0 340 Pass Yes WS10-DS412-01A WS10-DS412 WS10-DS412-01A 2/21/2007 1.0 240 Pass No WS10-DS413 WS10-DS413-00.5* 1/5/2007 0.5 290 Pass No WS10-DS413 WS10-DS413-01* 1/5/2007 1.0 330 Pass No WS10-DS414 WS10-DS414-00.5* 1/5/2007 0.5 310 Pass No WS10-DS414 WS10-DS414-01* 1/5/2007 1.0 450 Fail Yes WS10-DS414-02 WS10-DS414 WS10-DS414-02 2/1/2007 2.0 11 Pass No WS10-DS415 WS10-DS415-00.5* 1/5/2007 0.5 290 Pass No WS10-DS415 WS10-DS415-01* 1/5/2007 1.0 180 Pass No WS10-DS462 WS10-DS462-02 2/9/2007 2.0 46 Pass No

Back Yard - Sidewall Lead Area Depth Station ID Sample ID Sample Date Result Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled Area excavated to wall, WS10-DS453 WS10-DS453-01.5 7/13/2007 1.5 410 Fail Yes WS10-DS453 area removed WS10-DS472 WS10-DS472-01.5 6/13/2007 1.5 95 Pass No

Back Yard - Base Lead Area Depth Station ID Sample ID Sample Date Result Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DS436 WS10-DS436-00.5* 2/1/2007 0.5 2,440 Fail Yes WS10-DS436-02 WS10-DS436 WS10-DS436-01.5* 2/1/2007 1.5 759 Fail Yes WS10-DS436-02 WS10-DS436 WS10-DS436-02 2/28/2007 2.0 490 Fail Yes WS10-DS436-03 WS10-DS436 WS10-DS436-03 3/6/2007 3.0 540 Fail Yes WS10-DS436-04 WS10-DS436 WS10-DS436-04 5/30/2007 4.0 220 Pass No WS10-DS440 WS10-DS440-02 5/24/2007 2.0 220 Pass No WS10-DS441 WS10-DS441-02 6/13/2007 2.0 34 Pass No WS10-DS442 WS10-DS442-02 5/24/2007 2.0 230 Pass No WS10-DS443 WS10-DS443-02 5/30/2007 2.0 220 Pass No WS10-DS444 WS10-DS444-03 6/13/2007 3.0 4,200 Fail Yes WS10-DS444-04 WS10-DS444 WS10-DS444-04 6/26/2007 4.0 13 Pass No WS10-DS445 WS10-DS445-03 7/19/2007 3.0 7.3 Pass No WS10-DS446 WS10-DS446-03 7/13/2007 3.0 38 Pass No WS10-DS470 WS10-DS470-02 5/24/2007 2.0 710 Fail Yes WS10-DS470-03 WS10-DS470 WS10-DS470-03 6/13/2007 3.0 370 Pass No

Front Yard - Sidewall Lead Area Depth Station ID Sample ID Sample Date Result Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DS454 WS10-DS454-01 6/18/2007 1.0 89 Pass No WS10-DS455 WS10-DS455-01 6/21/2007 1.0 600 Fail Yes WS10-DS473-01 WS10-DS456 WS10-DS456-01 6/27/2007 1.0 310 Pass No WS10-DS473 WS10-DS473-01 6/25/2007 1.0 480 Fail Yes WS10-DS474-01 WS10-DS474 WS10-DS474-01 6/27/2007 1.0 410 Fail Yes WS10-DS475-01 WS10-DS476-02 WS10-DS475 WS10-DS475-01 7/2/2007 2.0 950 Fail Yes (basal sample)

Front Yard - Base Lead Area Depth Station ID Sample ID Sample Date Result Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DS437 WS10-DS437-00.5* 2/9/2007 0.5 420 Fail Yes WS10-DS437-02 WS10-DS437 WS10-DS437-01.5* 2/9/2007 1.5 480 Fail Yes WS10-DS437-02 WS10-DS437 WS10-DS437-02 6/18/2007 2.0 12 Pass No WS10-DS438 WS10-DS438-00.5* 2/9/2007 0.5 1,500 Fail Yes WS10-DS438-02 WS10-DS438 WS10-DS438-01.5* 2/9/2007 1.5 160 Pass No WS10-DS438 WS10-DS438-02 7/17/2007 2.0 630 Fail Yes WS10-DS438-03 WS10-DS438 WS10-DS438-03 7/23/2007 3.0 12 Pass No WS10-DS439 WS10-DS439-00.5* 2/9/2007 0.5 2,800 Fail Yes WS10-DS439-02 WS10-DS439 WS10-DS439-01.5* 2/9/2007 1.5 510 Fail Yes WS10-DS439-02 WS10-DS439 WS10-DS439-02 7/13/2007 2.0 590 Fail Yes WS10-DS439-03 WS10-DS439 WS10-DS439-03 7/19/2007 3.0 270 Pass No WS10-DS447 WS10-DS447-02 6/18/2007 2.0 12 Pass No WS10-DS449 WS10-DS449-02 6/21/2007 2.0 210 Pass No WS10-DS450 WS10-DS450-02 6/27/2007 2.0 31 Pass No WS10-DS476 WS10-DS476-02 7/9/2007 2.0 14 Pass No

Parsons Avenue - Sidewall Lead Area Depth Station ID Sample ID Sample Date Result Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DS429 WS10-DS429-00.5 4/18/2007 0.5 72 Pass No WS10-DS431 WS10-DS431-01 4/10/2007 1.0 4,400 Fail Yes WS10-DS469-01 WS10-DS461 WS10-DS461-01.5 5/9/2007 1.5 190 Pass No Area excavated north to WS10-DS428-01. WS10-DS469 WS10-DS469-01 4/18/2007 1.0 490 Fail Yes Results of WS10- DS428 are below 400 ppm Parsons Avenue - Base Lead Area Depth Station ID Sample ID Sample Date Result Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DS423 WS10-DS423-00.5* 1/25/2007 0.5 140 Pass No WS10-DS423 WS10-DS423-01.5* 1/25/2007 1.5 200 Pass No WS10-DS424 WS10-DS424-00.5* 1/25/2007 0.5 120 Pass No WS10-DS424 WS10-DS424-01* 1/25/2007 1.5 160 Pass No WS10-DS425 WS10-DS425-00.5* 1/25/2007 0.5 690 Fail Yes WS10-DS460-03 WS10-DS425 WS10-DS425-01* 1/25/2007 1.5 600 Fail Yes WS10-DS460-03 WS10-DS426 WS10-DS426-00.5* 1/25/2007 0.5 1,800 Fail Yes WS10-DS426-03 WS10-DS426 WS10-DS426-01.5* 1/25/2007 1.5 650 Fail Yes WS10-DS436-03 WS10-DS426 WS10-DS426-03 3/14/2007 3.0 320 Pass No WS10-DS427 WS10-DS427-00.5* 1/25/2007 0.5 5,100 Fail Yes WS10-DS427-03 WS10-DS427 WS10-DS427-01.5* 1/25/2007 1.5 500 Fail Yes WS10-DS427-03 WS10-DS427 WS10-DS427-03 3/8/2007 3.0 3,700 Fail Yes WS10-DS427-04 WS10-DS427 WS10-DS427-04 3/14/2007 4.0 15 Pass No WS10-DS428 WS10-DS428-01 4/18/2007 1.0 150 Pass No WS10-DS430 WS10-DS430-02 4/10/2007 2.0 280 Pass No WS10-DS459 WS10-DS459-03 5/1/2007 3.0 310 Pass No WS10-DS460 WS10-DS460-03 5/9/2007 3.0 180 Pass No WS10-DS464 WS10-DS464-03 3/8/2007 3.0 1,000 Fail Yes WS10-DS464-04 WS10-DS464 WS10-DS464-04 3/14/2007 4.0 100 Pass No WS10-DS465 WS10-DS465-03 3/28/2007 3.0 200 Pass No WS10-DS466 WS10-DS466-03 3/14/2007 3.0 270 Pass No WS10-DS467 WS10-DS467-03 3/28/2007 3.0 270 Pass No WS10-DS468 WS10-DS468-03 3/28/2007 3.0 18 Pass No

Exceedance of 400 ppm USEPA Child Soil Screening Criteria for Lead (Soil was subsequently excavated bgs = below original, pre-excavation ground surface * = preconfirmatory soil samples - soil samples collected prior to removal actions to better determine vertical and horizontal extent of excavations.

Page 1 of 1 TABLE B-17 Confirmatory Soil Sampling Results for Quarters STWY Washington Navy Yard, Washington, D.C.

Quarters S,T,W,Y

Sidewall Lead Area Depth Station ID Sample ID Sample Date Result Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DS422 WS10-DS422-01 1/11/2007 1.0 48 Pass No

Base Lead Area Depth Station ID Sample ID Sample Date Result Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DS416 WS10-DS416-00.5* 1/5/2007 0.5 250 Pass No WS10-DS416 WS10-DS416-01* 1/5/2007 1.0 690 Fail Yes WS10-DS458-02 WS10-DS421 WS10-DS421-02 1/11/2007 2.0 17 Pass No WS10-DS458 WS10-DS458-02 1/23/2007 2.0 16 Pass No

Exceedance of 400 ppm USEPA Child Soil Screening Criteria for Lead (Soil was subsequently excavated) bgs = below original, pre-excavation ground surface * = preconfirmatory soil samples - soil samples collected prior to removal actions to better determine vertical and horizontal extent of excavations.

Page 1 of 1 TABLE B-18 Confirmatory Soil Sampling Results for Quarters U Washington Navy Yard, Washington, D.C.

Quarters U

Front Yard - Sidewall Lead Area Depth Station ID Sample ID Sample Date Result Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DS477 WS10-DS477-01* 2/1/2008 1.0 400 Pass No WS10-DS478 WS10-DS478-01* 2/1/2008 1.0 140 Pass No WS10-DS479 WS10-DS479-00.5* 2/1/2008 0.5 90 Pass No WS10-DS480 WS10-DS480-00.5* 2/1/2008 0.5 210 Pass No

Front Yard - Base Lead Area Depth Station ID Sample ID Sample Date Result Pass/Fail Excavated & Resample ID (ft. bgs) (mg/kg) Resampled WS10-DS432 WS10-DS432-00.5* 1/29/2007 0.5 410 Fail Yes WS10-DS432-02 WS10-DS432 WS10-DS432-1.5* 1/29/2007 1.5 1,100 Fail Yes WS10-DS432-02 WS10-DS432 WS10-DS432-02 2/15/2008 2.0 130 Pass No WS10-DS434 WS10-DS434-00.5* 1/29/2007 0.5 390 Pass No WS10-DS434 WS10-DS434-1.5* 1/29/2007 1.5 150 Pass No WS10-DS434 WS10-DS434-01 2/15/2008 1.0 29 Pass No

Exceedance of 400 ppm USEPA Child Soil Screening Criteria for Lead (Soil was subsequently excavated) bgs = below original, pre-excavation ground surface * = preconfirmatory soil samples - soil samples collected prior to removal actions to determine vertical and horizontal extent of excavations.

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Parsons Avenue Lead Sample ID Result Resample ID (mg/kg) WS10-DS423-00.5 140 Preconfirmatory Soil Sample WS10-DS423-01.5 200 Preconfirmatory Soil Sample WS10-DS424-00.5 120 Preconfirmatory Soil Sample WS10-DS424-01 160 Preconfirmatory Soil Sample Quarters B Front Yard WS10-DS425-00.5 690 Preconfirmatory Soil Sample Lead WS10-DS425-01 600 Preconfirmatory Soil Sample Sample ID Result Resample ID WS10-DS426-00.5 1,800 Preconfirmatory Soil Sample (mg/kg) WS10-DS426-01.5 650 Preconfirmatory Soil Sample WS10-DS437-00.5 420 Preconfirmatory Soil Sample WS10-DS426-03 320 WS10-DS437-01.5 480 Preconfirmatory Soil Sample WS10-DS427-00.5 5,100 Preconfirmatory Soil Sample WS10-DS437-02 12 WS10-DS438-00.5 1,500 Preconfirmatory Soil Sample WS10-DS427-01.5 500 Preconfirmatory Soil Sample WS10-DS438-01.5 160 Preconfirmatory Soil Sample WS10-DS427-03 3,700 WS10-DS427-04 WS10-DS438-02 630 WS10-DS438-03 WS10-DS427-04 15 WS10-DS438-03 12 WS10-DS428-01 150 WS10-DS439-00.5 2,800 Preconfirmatory Soil Sample WS10-DS429-00.5 72 WS10-DS439-01.5 510 Preconfirmatory Soil Sample WS10-DS430-02 280 WS10-DS439-02 590 WS10-DS439-03 WS10-DS431-01 4,400 WS10-DS469-01 WS10-DS439-03 270 WS10-DS459-03 310 WS10-DS447-02 12 WS10-DS460-03 180 WS10-DS449-02 210 WS10-DS461-01.5 190 WS10-DS450-02 31 WS10-DS454-01 89 WS10-DS464-03 1,000 WS10-DS464-04 WS10-DS455-01 600 WS10-DS473-01 WS10-DS464-04 100 WS10-DS456-01 310 WS10-DS465-03 200 WS10-DS473-01 480 WS10-DS474-01 WS10-DS466-03 270 WS10-DS474-01 410 WS10-DS475-01 WS10-DS467-03 270 WS10-DS475-01 950 WS10-DS476-02 (basal sample) WS10-DS468-03 18 WS10-DS476-02 14 Area excavated north to WS10-DS428­ WS10-DS469-01 490 01. Results of WS10-DS428 are below 400 ppm

Figure B-10 Quarters B and Leutze Park Excavation Areas and Depths Site 10 Record of Decision Washington Navy Yard Washington, D.C. Exceedance of 400 ppm USEPA Child Soil Screening Criteria for Lead

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Figure B-12 Quarters U Excavation Areas and Depths Site 10 Record of Decision Washington Navy Yard Washington, D.C. ei ubli i e ubli ee i g Tra s ri a ubli e eer Transcript from public meeting.txt 0001 1 2 3 4 5 6 WASHINGTON NAVY YARD 7 PUBLIC MEETING - PROPOSED PLAN FOR SITE 10 8 9 10 11 WASHINGTON NAVY YARD, BUILDING 212 12 2ND FLOOR CONFERENCE ROOM 13 WASHINGTON, DC 14 15 16 17 MEETING NUMBER 58 18 6:00 P.M. 19 WEDNESDAY, SEPTEMBER 10, 2008 20 21 22 0002 1 Attendance: 2 Armalia Berry-Washington, Navy Co-Chair 3 Kathleen Holly, Community RAB Co-Chair 4 Carolyn Barley, DDOE 5 Robert Stroud, EPA Region III 6 Scott MacEwen, CH2M Hill, Inc. 7 Seymour Selig 8 Johnny Ferguson 9 10 11 12 13 14 15 16 17 18 19 20 21 22 0003 1 P R O C E E D I N G S 2 [Convened at 6:15 p.m.] 3 MS. BERRY-WASHINGTON: Good evening, everyone, 4 and welcome to the Public Meeting for Site 10 that we’re 5 holding in place of the Restoration Advisory Board Meeting 6 tonight. And myself along with DDOE and EPA will be 7 presenting a summary of the Proposed Plan for Site 10 at 8 the Washington Navy Yard. 9 And again, my name is Armalia Berry-Washington, 10 and I am the Remedial Project Manager for the Washington 11 Navy Yard, for the record, as you all are aware. And we’ll 12 just move right in. 13 MS. BARLEY: And I am Carolyn Barley. And I’m 14 Project Manager for the District Department of the 15 Environment. 16 Well, as Armalia said, the Proposed Plan that Page 1 Transcript from public meeting.txt 17 we’re talking about tonight is for Site 10 on the 18 Washington Navy Yard. And actually, Site 10 is four areas, 19 there, there, there, and there, and it is commonly referred 20 to as Admiral’s Row. And really, the site consists of soil 21 -- which we’ll talk more about later -- surrounding the 17 22 buildings and areas associated with the flag housing and 0004 1 ceremonial uses. And these are some of the pictures of 2 some of those buildings. But it includes residential 3 buildings, Building 1 - Leutze Park -- is that the correct 4 pronunciation, Leutze? 5 MR. SELIG: Leutze, right. 6 MS. BARLEY: And Latrobe Gate. And the issue is, 7 with regard to Site 10, is that the soil was impacted with 8 lead from paint. I mean, I think we all know we used lead 9 in paint for decades, from coming off of these buildings. 10 And of course that was deposited within the soil. 11 MS. BERRY-WASHINGTON: And as you all are 12 familiar, we follow the installation/restoration process 13 with our program. And that consists of the preliminary 14 assessment, the site investigation, the -- and that’s the 15 early stages of identifying that there may be a problem for 16 record searches, and then actually going out and taking 17 some samples under the site investigation. And then under 18 the Remedial Investigation Feasibility Study, it’s 19 determining the nature and extent and if there is a risk at 20 the site. 21 And of course during any of those stages if you 22 determine that there is an immediate threat to human health 0005 1 or the environment, you can go in and do an intra-removal 2 action, which is something that we did conduct at this 3 site. And then you can move down to the proposed plan, and 4 that’s the phase that we’re in now. To share with the 5 public what the next steps are, in this particular case, 6 there’s no further action because we actually conducted a 7 removal action at the site and so we have removed the 8 risks. So we are proposing no further action to close out 9 the site. And then of course to close out the site you do 10 a Record of Decision. And in some instances, if you 11 haven’t done a removal action, then you would do the 12 remedial design and remedial action. 13 MS. HOLLY: Ms. Washington, I have a question. 14 In -- anywhere in our report -- in your report, do you 15 mention inviting the fact that we gave all of the residents 16 on Admiral Row letters telling them about the 17 contaminations and letting them sign off on whether they 18 were living there and that kind of thing? 19 MS. BERRY-WASHINGTON: Yeah. We actually didn’t 20 have them sign off, but we do have documentation that we -- 21 we did hand out fact sheets. 22 MS. HOLLY: Yes. 0006 1 MS. BERRY-WASHINGTON: Yes. 2 MS. HOLLY: Yes. And I want somewhere in the 3 record to say that we made sure that they were aware of 4 just what the conditions were when they were moving in. 5 And now that they’re all painted, it’s fine. But that we 6 also showed in the human side of the fact that we’ve let 7 them know in advance. We didn’t just hush-hush; we let 8 them know and removed shrubs and everything from around 9 there. 10 MS. BERRY-WASHINGTON: Yeah. Okay. We’ve got Page 2 Transcript from public meeting.txt 11 that down. Yeah. 12 MALE: You got it, too. 13 MS. BERRY-WASHINGTON: Next slide. So just to 14 give you a history of what we did at Site 10, and Site 10 15 is one of our first -- or, oldest sites. And I know you 16 guys have heard about it for quite some time. In 1993, we 17 started the preliminary assessment where we did the record 18 searches and interviews and determined that there was a 19 possible problem. 20 In 1996, we did the site investigation, did some 21 sampling around the housing units, and we did find lead in 22 the soil. We ran it for all contaminants, but the lead in 0007 1 the soil was what was the contaminant of concern that fell 2 out. 3 In 1999, we did a facility-wide Remedial 4 Investigation and we had about 11 sites lumped into a 5 facility-wide Remedial Investigation to determine the 6 nature and extent of the contamination and if there was a 7 risk. We actually pulled Site 10 out of that grouping in 8 2002 to do a more detailed Phase II investigation in terms 9 of nature and extent of the lead in the soil at the 10 Quarters -- all of the Quarters, or anywhere we knew that 11 we did lead-based painting for the Quarters. 12 And then in 2004, we actually did a focused 13 Remedial Investigation to get some further information 14 before we started our removal action, and the funding 15 actually began in 2003. 16 In 2003 to 2008 -- and we’ve kind of talked about 17 this over the past several meetings -- we conducted a 18 removal action. And that was a huge -- that’s one -- well, 19 that has been our biggest removal action to date here at 20 the Washington Navy Yard -- over 2,000 cubic yards of soil 21 removed. 22 MS. HOLLY: And shrubs and everything. 0008 1 MS. BERRY-WASHINGTON: Exactly. And that cost 2 over $5 million; we had to phase it because it was so much 3 money, and did a little bit each year. 4 And this is a picture. This gives you -- the 5 green shows you the areas where soil was removed, just to 6 give you a picture of the extent of soil that was removed 7 at Site 10 of the various Quarters throughout the yard. 8 MR. MACEWAN: Did you talk about the depth of the 9 soil? 10 MS. BERRY-WASHINGTON: Yeah. It was probably -- 11 we’ll get to that to the next slide. But I can go ahead 12 and just mention here that we did excavations from the 13 range of one foot to four feet, depending on the 14 contamination level. And I’ll talk to the level at the 15 next slide. (Inaudible) just not complete. 16 So this is -- the next few slides are examples of 17 the -- some pictures of the actual removal actions that 18 took place. And essentially how it worked was the 19 excavation areas were determined based on the lead 20 concentration in the soil. So essentially 400 parts per 21 million was the action level. If it was greater than that, 22 we were taking -- we were excavating the soil. 0009 1 And so how the process worked during each of the 2 phases for the removal action, CH2M Hill would come out and 3 actually test the soil and mark the areas where we had 400 4 or greater. And they would mark it like that for our Page 3 Transcript from public meeting.txt 5 construction contractor, which was Shore, to actually come 6 and excavate. And they would sample that depth and let 7 them know one foot, two feet. And then Hill would come 8 back out and take samples to confirm that all the soil -- 9 contaminated soil was removed and that we had levels of 10 lead, if it was still in the soil, of less than 400 parts 11 per million. If it was still greater than 400 parts per 12 million, we went down further, another foot or two 13 depending on how high the levels were. For example, if it 14 was 1,000 parts per million, well, then we took out an 15 additional two feet. If it was 500 parts per million, then 16 we would just take out an additional one foot. And so 17 that’s pretty much how the process worked. 18 And once it was confirmed that everything was 19 below 400 parts per million, then the excavated area was 20 restored to its original condition, backfilled with clean 21 soil and then we restored all of the shrubs, flowers, 22 bushes, or grass -- whatever the situation was. 0010 1 And this is just another example of a removal 2 action -- the rose garden at Quarters A. And slide one is 3 showing before, a different -- slide two is showing the 4 mark-out before the actual excavation, and slide three is 5 showing after the excavation before they actually 6 backfilled. That’s kind of an example of what it looked 7 like. 8 MR. SELIG: Are you going to have the map on the 9 screen again? 10 MS. BERRY-WASHINGTON: The one that showed the 11 green areas? 12 MR. SELIG: Yeah. And the locations. 13 MS. BERRY-WASHINGTON: No, but we can -­ 14 MR. SELIG: (Inaudible). 15 MS. BERRY-WASHINGTON: -- you need to refer back 16 to it? 17 MR. MACEWAN: It’s actually in the center of the 18 -- (inaudible) -- 19 MR. SELIG: I just have sort of a quirky 20 interest. Are you familiar with Quarters R? I didn’t see 21 any reference on the map to it. 22 MS. BERRY-WASHINGTON: Right here? 0011 1 MR. SELIG: Oh. Thank you. Got it right up in 2 my nose. That -- right. I was looking up there. 3 MS. BERRY-WASHINGTON: Okay. 4 MR. SELIG: Quarters -- the reason I’m 5 interested, in Quarters R is where David Taylor lived for 6 many years. Now, he was Admiral Taylor and he was the guy 7 that the David Taylor Model Basin -- 8 MR. STROUD: Is he the David Taylor named after 9 the research lab as well? 10 MR. SELIG: Yeah. That’s -- 11 MS. BERRY-WASHINGTON: Oh. Okay. 12 MR. SELIG: And then -- right. When I said David 13 Taylor, it used to be the David Taylor Model Basin. And 14 when he was -- I mean, it was his doing, he was the 15 constructor over here and even over here, Building 70, it 16 says David Taylor. Yeah. But he was very -- he was a 17 famous, you know, person, you know, world class scholar. 18 MS. BERRY-WASHINGTON: Oh. 19 MR. SELIG: He had the highest academic grades, 20 up to his time, at Annapolis and also at the Royal Academy 21 in England where he was sent because he had the highest Page 4 Transcript from public meeting.txt 22 grades. 0012 1 FEMALE: He has to go somewhere. 2 MR. SELIG: Yeah. And, you know, he testified on 3 the sinking of the Titanic and, you know, just a great 4 world authority. He was here for many years. In Quarters, 5 you know, if you look at some of the letters and so forth, 6 it says Quarters R, and I just saw that. 7 MS. BERRY-WASHINGTON: Oh, uh huh. Yeah. There 8 it is. 9 MR. SELIG: Yeah. We’re talking 1908, 1912 -- 10 MS. BERRY-WASHINGTON: Yeah. Uh huh. Yeah. 11 Interesting. Okay. 12 Well, this is just another slide of another 13 example of where we did a removal action of a flower box 14 area. The first slide shows before and the slide just 15 below it shows after removing the shrub and excavating the 16 soil out of that area. And of course, that area was 17 restored back to its original condition. The plants -- new 18 plants, replanted. And then the far-right slide just gives 19 an example of how we protected the trees that we didn’t 20 want to lose during excavation. So those are just a few 21 examples of the removal action. Okay. 22 MR. STROUD: Good evening. My name is Bob 0013 1 Stroud. I am with the Environmental Protection Agency and 2 I’m going to talk to you about the risk assessment approach 3 that was taken for Site 10 at the Washington Navy Yard. 4 Well, being a regulator, whenever one of our 5 partners talk about doing a site that has a no further 6 action approach to it, we have to look at the risk 7 assessment and make sure that the risk warrants no further 8 action. For this particular site, Site 10, the risk 9 assessment approach evaluated risk from soil to current and 10 possible future site users, which included the residents 11 that actually lived at the site -- that being an adult and 12 a child. And the child resident is actually the most 13 conservative risk group out of these. We also took a look 14 at visitors, you know, adult and child visitors that would 15 come and visit the site, and construction and industrial 16 workers that would actually be working in the soil. 17 This risk assessment assumed that the sub-surface 18 soil would be brought to the surface in the future so 19 people could actually come in contact with it. And that’s 20 also actually the most conservative risk scenario because 21 the contamination was actually in the sub-surface, not 22 necessarily on the surface of the ground. So this risk 0014 1 assessment assumed that the soil was dug up and the most 2 contaminated soil was laying on the surface. We also did 3 an ecological risk which evaluated soil from worms, 4 insects, plants, and birds. The focus of this risk 5 assessment, as I said, is on the surface and sub-surface 6 soil. The groundwater at this site has not been evaluated; 7 it’s being evaluated under a separate study. 8 These are the human health risks prior to the 9 removal action. As was mentioned before, lead was the 10 contaminant of concern and the potential risk was to the 11 child, which assumed that a child would ingest or eat this 12 soil every day for six years. And like I said, that’s the 13 most conservative risk assessment scenario that, you know, 14 that you could think of. This is not necessarily a 15 realistic thing that happens, but this is the way we talk Page 5 Transcript from public meeting.txt 16 about risk. And as mentioned before, the ecological risk 17 looked at the potential to invertebrates, you know, worms, 18 basically, plants and birds. 19 Now, the removal action activities that Armalia 20 talked about, mitigated the risks by removing all the soil 21 that was under 400 parts per million. That’s an important 22 number; that’s EPA screening level for a residential area. 0015 1 I mean, basically anything under 400 is considered safe for 2 lead and soil. Anything above, you have to do an 3 investigation or do some sort of removal. 4 Okay. As a result of the removal action, there 5 was found to be no risk and -- you know, for exposure to 6 the soil at Site 10. And it didn’t result in an 7 unacceptable risk to people or animals. 8 So a feasibility study wasn’t evaluated and 9 wasn’t warranted here for this site. And a feasibility 10 study is basically like if you have contamination at a 11 site, you have to do a further study. A feasibility study 12 usually takes four different scenarios where you could do a 13 cleanup and you would pick one based on different criteria. 14 But in this particular instance, we didn’t need to do that 15 because there was no risk associated with this site. 16 MR. SELIG: Did the procedure follow the ASTM 17 procedures? 18 MR. STROUD: Well, I think a few slides before, 19 Armalia talked about the different -- the Superfund process 20 with the RI/FS and the decision document. It didn’t follow 21 ASTM but it followed the CERCLA process, which we’re using, 22 and Superfund. But like I said, no feasibility study was 0016 1 done here because there was no risk associated with the 2 site. 3 And the proposed remedy is no further action for 4 Site 10 based on no risk at the site because of the soil 5 excavation. 6 The public comment period for this site begins 7 today with this public meeting and ends on October 9th. 8 This is 30 days, which is one of the requirements in 9 Superfund when you have a public meeting. Anyone that has 10 comments, you can provide comments at this meeting or you 11 can provide comments any time within the 30-day period. 12 You can see the instructions for providing comments in your 13 proposed plans. I have the contact names on the back of 14 there. 15 And the comments and any responses -- well, the 16 comments and the responses that, you know, that we have 17 will be included in the Record of Decision once the public 18 comment period is over. 19 So don’t feel like you have to have, you know, 20 questions today. I mean, if you have some other concerns, 21 you can always, you know, send something out and get your 22 question asked. 0017 1 MS. HOLLY: I think what’s frightening is that I 2 remember -- I’ve been here through the whole process. I 3 remember when it started -- 4 MR. STROUD: Oh, okay. 5 MS. BERRY-WASHINGTON: She’s been here for the 6 whole process. 7 MS. HOLLY: And each step of the way has been 8 reported to the RAB meetings to know what they were doing 9 and what it was costing and the different steps that they Page 6 Transcript from public meeting.txt 10 had to take, so I remember the whole scenario. 11 MR. STROUD: So this makes a whole lot of sense 12 to you, right? 13 MS. HOLLY: Oh, yes. Yes, because I remember 14 when we were having the conversations about how many 15 particles, you know, the 400, whether it was residential 16 or, you know, and the different levels that you would go 17 through and how you would carry it out. So, yes, I can 18 attest to this whole process. 19 MR. STROUD: You lived through the whole thing. 20 MS. HOLLY: Yes. And it took place, too. 21 MR. FERGUSON: You were concerned how was the 22 dirt going to get out. 0018 1 MS. HOLLY: Yes. 2 MS. BERRY-FERGUSON: That’s right. 3 MS. HOLLY: Were you going to bring it to our 4 communities and were you going to keep it covered, and 5 those kinds of things, because, yeah, we were here for that 6 whole thing. 7 MS. BERRY-WASHINGTON: Yeah. We actually had 8 Shore come and give a presentation and, you know, just 9 talked through it. 10 MS. HOLLY: So, if there is -- if there is one 11 thing that this does prove, though -- or as a RAB board 12 might prove, is the fact that if a community person has a 13 concern, we can say we were here and we were going through 14 this. 15 MS. BARLEY: And participated in that step. 16 MS. HOLLY: And we asked questions to make sure 17 different things -- we even asked about the workers as to 18 whether they were covered or not. 19 MR. STROUD: Right. And they were part of the 20 risk assessment scenarios as well. 21 MS. HOLLY: So, yes, we can attest to this. 22 MS. BARLEY: And you can attest it took awhile. 0019 1 MS. HOLLY: Yes. 2 MS. BARLEY: It took awhile, but it just probably 3 seems like yesterday. 4 MS. HOLLY: But we were concerned -- well, the 5 people here that worked here, Armalia and them, were 6 concerned. And when we asked about the residents and who 7 lived there, what about a letter, you know, to go through 8 to make sure that they know what’s there and whatever. 9 Yes, all that process of caring and step-by-step took 10 place. So the people that lived there were thought about. 11 So, yes, we’ve -- 12 MR. STROUD: Yeah. And the big thing here -- I 13 mean, as we said in the presentation -- was the soil 14 removal and the soil removal below that action level of 15 about 400 parts per million. And the fact that the Navy 16 took confirmation samples after the soil was removed to 17 ensure that any of the soil was below the 400 parts per 18 million level. 19 MS. BERRY-WASHINGTON: Any other questions or 20 comments? Did it make sense about the ASTM question that 21 you had? 22 MR. SELIG: Yeah. 0020 1 MS. BERRY-WASHINGTON: Okay. 2 MR. SELIG: I -- just, there are several 3 alternative methods. Page 7 Transcript from public meeting.txt 4 MS. BERRY-WASHINGTON: Hmm, hmm. Right. 5 MR. SELIG: -- practice. 6 MS. BERRY-WASHINGTON: Okay. Well, if there are 7 no further questions or comments at this time -- 8 MR. STROUD: Mr. Selig, and when you talk about 9 ASTM, there are different methods that (inaudible). The 10 big method in the Superfund is called SW-846. And there 11 are different headings under that, but SW-846 is the method 12 under Superfund that is used, you know, for the different 13 testing. 14 MR. SELIG: I think they sort of built out front 15 of the ASTM. 16 MR. STROUD: They may have. 17 MS. BERRY-WASHINGTON: Okay. 18 MR. SELIG: A digression here. You asked about 19 if you pronounce L-E-U-T-Z-E and say Lewtzie (phonetic). 20 That’s how the Navy pronounces it; it’s named for Eugene 21 Leutze, who was the Commandant here in the early 1900’s. 22 His father came from Germany, and there it’s pronounced 0021 1 Loytza (phonetic). 2 MS. BARLEY: It’s spelled the same way, though? 3 MR. SELIG: Huh? 4 MS. BARLEY: Spelled the same way? 5 MR. SELIG: Yeah. Right. 6 MS. BARLEY: Loytza (phonetic). 7 MR. FERGUSON: Yeah. And he was Emanuel Leutze, 8 who is a well -- who was a famous artist. And he did the 9 painting which you all know and love of George Washington 10 crossing the Delaware. 11 MS. BARLEY: Oh, you’re kidding? 12 MR. SELIG: Would I lie to you? 13 [Laughter] 14 So, and, you know, and he had picture -- 15 [Crosstalk] 16 MS. BARLEY: See, now, one of these days we need 17 to do (inaudible). 18 MS. BERRY-WASHINGTON: Well, but before we go on, 19 we’ll just conclude this public meeting. 20 MS. BARLEY: Yeah. 21 MS. BERRY-WASHINGTON: So that we can get him off 22 -- 0022 1 MR. SELIG: Yeah, I said it was digressing. 2 MS. BERRY-WASHINGTON: Oh, yeah, no, it’s okay. 3 That’s fine. I just wanted to give him -- to let him know 4 he’s off. This concludes the public meeting. 5 [Whereupon, at 6:40 p.m., the meeting was 6 adjourned.] 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Page 8 Transcript from public meeting.txt 21 22

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