Anacostia Streetcar Phase 2 Environmental Assessment and Section 106 and 4(f) Evaluations. APPENDIX C Hazardous Materials Technical Report

Transcription

1 Anacostia Streetcar Phase 2 Environmental Assessment and Section 106 and 4(f) Evaluations APPENDIX C Hazardous Materials Technical Report September 2013

2 TABLE OF CONTENTS 1.0 PROJECT DESCRIPTION AND PURPOSE Project Introduction Project Description Purpose of the Proposed Action Need for the Proposed Action CONCEPTUAL ALIGNMENT ALTERNATIVES HAZARDOUS MATERIALS Background Methodology Existing Conditions DIRECT AND INDIRECT IMPACTS Mitigation LIST OF TABLES Table 1: Release Sites and Risk Rankings for Alternative Table 2: Release Sites and Risk Rankings for Alternative Table 3: Release Site and Risk Rankings for Alternative Table 4: Release Sites and Risk Rankings for Alternative Table 5: Risk Ratings of Release Sites Associated with Each Alternative LIST OF FIGURES Figure 1: Study Area... 3 Figure 2: Location of Hazardous Materials Adjacent to the Proposed Alternatives... 15

3 1.0 PROJECT DESCRIPTION AND PURPOSE 1.1 Project Introduction The DC Streetcar network is the product of more than a decade of studies and plans to address the continued need for better internal cross town travel by transit through various parts of Washington, DC. To serve key corridors that would benefit from increased transit investment, the District Department of Transportation (DDOT) is planning a 37-mile, state-of-the-art streetcar system to complement the regional Metrorail subway system and Washington Metropolitan Area Transit Authority (WMATA) bus lines. The proposed project (Anacostia Streetcar Extension) will connect to the 11th St Bridge which is critical to joining sections of the city located on the eastern and western sides of the Anacostia River. The proposed project is the next stage in the project development process consistent with the approved long term transit network. It will be a part of a citywide streetcar network, designed to improve connectivity among neighborhoods, and to invest in an urban public transportation project that will help to foster economic development and provide a permanent public service amenity that promotes livability and economic reinvestment. The proposed project is intended to fulfill DDOT s commitment to improve quality public transportation in the District, to provide improved neighborhood access to the greater public transportation network, and to provide transportation choice to Anacostia residents and businesses. Extension of the DC Streetcar network is seen as a major public infrastructure investment that will help to reinforce and sustain vibrant and stable neighborhoods, rebuild retail corridors, foster improved accessibility to employment opportunities, and promote sustainable development patterns. DDOT has prepared a Draft Environmental Assessment (EA) for the Anacostia Streetcar Extension Project to evaluate and address the potential environmental effects associated with implementing transit improvements in the form of a streetcar network within the Anacostia neighborhood in Southeast Washington, DC. The Draft EA was prepared in compliance with the National Environmental Policy Act of 1969 (NEPA), as amended, and the regulations pursuant to the Act. This Hazardous Materials Technical Report provides further documentation of the data and analysis presented in the Draft EA section regarding hazardous materials. This report serves as a detailed record of the hazardous materials data collection and analysis that was performed during the environmental review process. 1.2 Project Description The proposed Anacostia Streetcar Extension project would be located within the Anacostia neighborhood of Ward 8 in Southeast Washington D.C. It would consist of a modern streetcar system that would generally connect the Anacostia neighborhood and its surrounding area to activity centers in Downtown Anacostia, and provide improved connectivity between the Anacostia neighborhood, the Anacostia Metro Station, the end of initial streetcar alignment under construction, and the 11 th Street Bridge. The proposed project would be a fixed guideway transit line that would include electricallypowered streetcar vehicles operating along tracks located within the existing street and travel lanes. Hazardous Materials Technical Report Page 1

4 The project study area is generally bounded by Q Street to the North and the intersection of Martin Luther King Jr. Avenue and Pomeroy Road, SE to the South (see Figure 1, below). The east west project limits are generally one-quarter mile from the centerline of Martin Luther King Jr. Avenue. However, in some areas the eastern and western boundaries of the study area expand beyond the one-quarter mile boundary in order to include city blocks that would otherwise be divided. This approach allows the analysis to include a greater portion of the community. Hazardous Materials Technical Report Page 2

5 Figure 1: Study Area Hazardous Materials Technical Report Page 3

6 1.3 Purpose of the Proposed Action The purpose of the project is to develop and maintain an efficient, reliable, and convenient transit service that would enhance connectivity within and between neighborhoods and supports community revitalization and economic development within Southeast Washington, D.C. The project would help to expand access to economic and employment opportunities throughout the District by increasing the service coverage for fixed guideway, in-street public transportation. This increased connectivity and public infrastructure investment is expected to contribute to increased real estate values and facilitate development potential in the study area. The proposed project would also improve access and connectivity for residents and visitors to the Anacostia business and historic district and promote sustainable transit services, infrastructure, and development patterns. 1.4 Need for the Proposed Action The study area and the District need infrastructure investments that will create and reinforce a vibrant and stable neighborhood, rebuild the retail corridor, attract new jobs to Anacostia, and promote sustainable development and transportation patterns. The proposed action will encourage development along its route and attract new residents and employees to the community. New government facilities and increased private sector development activity have led to the completion of nineteen development projects in the Anacostia neighborhood since The Washington, D.C. Economic Partnership s 2009/2010 Development Report listed Anacostia as one of four development hotspots in the District of Columbia (DC Streetcar Project Extension Proposal 2010). In addition, analysis indicates that any development activity that occurs within one-quarter mile of the proposed action is assumed to be new to the region, rather than reallocated from other areas. Developers interviewed for this project indicated that levels of investment would increase and retaining tenants would be easier if streetcar service is brought to the area. Further analysis demonstrated that projected development would not have occurred elsewhere in the region and that implementation of streetcar service increasing mobility and access in Anacostia is attractive to developers (Benefit-Cost Technical Memorandum 2010). Increased residential and office activity along the streetcar corridors will benefit retail values and increase demand for retail space nearby. Analysis conducted for the DC Streetcar Land Use Study indicates that each 1,000 new households could spur development of roughly 30,000 to 50,000 square feet of additional retail space within a five to ten minute walk (DCOP, 2012). The District of Columbia Transit Alternatives Analysis (2005, 2008 Update, 2010 Update) found that the existing transit network does not provide efficient connectivity between employment centers and residential areas in many parts of the city. Slow travel times by bus and need for multiple transfers are a major factor leading to the choice to drive to work rather than take transit. These additional auto trips further contribute to increased traffic congestion in areas with limited transit service. Hazardous Materials Technical Report Page 4

7 The proposed action is needed to increase transit capacity and provide reliable and sustainable public transportation options within the Anacostia community. The neighborhood is highly dependent on public transportation for mobility and access to the city s growing employment centers. According to DC Office of Planning (DCOP) and U.S. Census data, the Study Area contains significant concentrations of transit-dependent households nearly 11 percent of households in the Study Area have no access to a car (U.S. Census, ACS). In addition 55.7 percent of households have an annual income below $35,000). The proposed action will improve connectivity for transit-dependent households in Anacostia and enhance sustainable transportation options in the District. 2.0 CONCEPTUAL ALIGNMENT ALTERNATIVES The Anacostia Streetcar Extension project is following the FTA s project development process. This process emphasizes the early development of a wide range of alignment options that can be systematically reduced to a smaller number of the most-promising alternatives. The remaining alternatives are further screened to develop a single locally-preferred alternative (LPA) that can be carried forward for design and construction. The project development process is designed to identify and screen a long list of potentially reasonable and feasible alternatives to ensure that the subsequent LPA reflects the most practicable alternative one that is the most responsive to the project s purpose and need. Conceptual streetcar layout performed as part of the DC Transit Futures Plan suggested a double track streetcar alignment along Martin Luther King, Jr. Avenue SE. Subsequently, DDOT conducted public meetings to help identify transportation needs in the community, gain an understanding of the concerns regarding streetcars, and provide opportunities for the public to suggest alignment alternatives. Based on those meetings, nine initial alignment alternatives were developed. DDOT later presented the nine alignment alternatives to public agency representatives at a meeting for the Interagency Technical Advisory Committee (ITAC). During this meeting a tenth alignment alternative was developed. The screening process was conducted in two steps by DDOT staff, consultants, and agency partners: first, an Advantages/Disadvantages Matrix was completed, and then an Evaluation Criteria Matrix was completed. The Advantages/Disadvantages Matrix was developed to aid in the initial discussion of the alternatives and was the first level of analysis for the review of the alternatives. The Evaluation Criteria Matrix listed each of the evaluation criteria and allowed reviewers to assign a high, medium, or low score to the alternatives for each criterion. Upon reviewing the number of high or low scores, DDOT was able to evaluate the alignment alternatives in more detail and identify the alignments that should move forward for further evaluation. In addition, the ten initial alignment alternatives and a No-Build Alternative were discussed and evaluated during small group sessions at a public meeting. Participants provided comments on each of the alternatives, an on-line survey was conducted, and DDOT accepted and written comments. The alternatives that were carried forward for analysis in the environmental assessment are: Alternative 2: Martin Luther King, Jr. Avenue/13 th Street Alternative 4: Martin Luther King, Jr. Avenue/Shannon Place Alternative 5: Martin Luther King, Jr. Avenue/Railroad Avenue Hazardous Materials Technical Report Page 5

8 Alternative 9: CSX Railroad Double Track 3.0 HAZARDOUS MATERIALS 3.1 Background The findings of this preliminary hazardous materials screening and evaluation are not intended to substitute for more detailed studies, such as an American Society for Testing and Materials (ASTM)- compliant Phase I Environmental Site Assessment or subsurface soil and groundwater investigations. This screening is meant to identify low- medium- and/or high-risk properties as a guide for identifying potential contamination in the study area. Further technical and more detailed investigations may be required to determine the existence of oil and hazardous materials (OHMs) prior to property acquisitions, utility relocations, and construction of project elements. The identification of a site in this report does not conclusively confirm that the property has hazardous waste/material contamination, but rather that it has the potential to contain OHMs. There may be additional sites with contamination issues that have not been identified in this screening due to noncompliance with regulations or incomplete regulatory/historical information. The United States Environmental Protection Agency (USEPA) and the District Department of the Environment (DDOE) regulate the handling, storage, generation and use of OHMs. USEPA and DDOE maintain records of known hazardous materials release sites and enforce specific guidelines for the treatment and removal of OHMs at these sites. USEPA regulations specify the actions required in the case of a spill or release of OHMs. Under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA), regulations outlined in 40 Code of Federal Regulations (CFR) 302, the USEPA must be notified any time there is a release of a reportable quantity of OHMs. The DDOE also regulates the use, storage and generation of OHMs under the District of Columbia Hazardous Waste Management Act of Methodology A review of historically completed documentation prepared in the vicinity of the study area was conducted. There were no environmental reports prepared for the entire study area, however several previously completed reports included portions of the study area. The following reports (title, author, date) were reviewed for hazardous waste/materials information: 11 th Street Bridges Final Environmental Impact Statement, CH2MHill, October 2007 South Capitol Street Draft Environmental Impact Statement/Section 4(f) Evaluation, January 2008 Department of Homeland Security Headquarters Consolidation at St. Elizabeth s Master Plan Amendment East Campus North Parcel Draft Environmental Impact Statement, U.S. General Services Administration (GSA) and National Capital Region (NCR), December 2010 Review of these reports did not reveal additional hazardous waste/materials sites beyond those outlined in the environmental database search described below. Hazardous Materials Technical Report Page 6

9 A records review of various federal and state environmental listing databases was conducted for the study area in July Environmental FirstSearch Technologies (EFT) produced a database report detailing hazardous waste release sites identified within the study area boundaries. The environmental databases reviewed include: National Priority List (NPL); Comprehensive Environmental Response Compensation and Liability Information System (CERCLIS); No Further Remedial Action Plan (NFRAP); Resource Conservation and Recovery Information System (RCRA); Federal Brownfield; Emergency Response Notification System (ERNS); Tribal Lands; State/Tribal Sites; State Spills 90; State/Tribal Solid Waste Landfills (SWL); State/Tribal Leaking Underground Storage Tanks (LUST); State/Tribal Underground Storage Tanks/Aboveground Storage Tanks (UST/AST); State/Tribal Engineering Controls (EC); State/Tribal Institutional Controls (IC), State/Tribal VCP (VCP); State/Tribal Brownfields; and Federal IC/EC. The EFT report is included in this appendix and described in the Existing Conditions section, below. A visual inspection of the properties located directly adjacent to the streetcar route was conducted on August 11, 2011 to identify potential sources of hazardous waste/materials. The inspection was conducted from the street and none of the subject properties were accessed. No on-site testing or assessment was conducted as part of this inspection. Based upon the historical documentation review, environmental database review and visual inspection, each release site was then assigned a low-medium-high risk ranking relative to the possibility of encountering OHMs. 3.3 Existing Conditions The review of state and federal environmental database records revealed evidence of numerous recognized environmental conditions (RECs), which are potential sources of OHMs. These RECs require further investigation in the form of soil and/or groundwater sampling and analysis, to determine if the properties identified may impact the study area. The EFT report identified 97 confirmed release sites in the study area. The release sites are scattered throughout the study area, however, the majority of them are located in the vicinity of Martin Luther King Jr. Avenue. The release sites located directly adjacent to the proposed streetcar routes have been identified and explained in Tables 1 through 4 and shown in Figure 2. The site investigation revealed one additional property with potential sources of OHMs. There are a number of large electrical transformers located on the property south of the Howard Road Academy at 2405 Martin Luther King Jr. Hazardous Materials Technical Report Page 7

10 Avenue; there is no address at this property and it is not listed in the environmental databases. However, electrical transformers are a known source of polychlorinated biphenyls (PCBs); therefore, information regarding this site has also been included in the tables. Further investigation into the presence of OHMs at this site would be required. Based upon the historical documentation review, environmental database review and visual inspection, each release site was assigned a risk ranking (low, medium, or high) relative to the possibility of encountering OHMs. See Tables 1 through 4 for these rankings. Hazardous Materials Technical Report Page 8

11 Table 1: Release Sites and Risk Rankings for Alternative 2 SITE NAME ADDRESS DATABASE DESCRIPTION OF RELEASE RISK Amoco gas station MLK Jr Ave. & Howard Rd. ERNS Gas pump leaking slowly for a couple of months, reported in 1990 Medium Texaco/Chevron 2502 MLK Jr Ave. UST, LUST Reported in 1990 High Unknown 2500 MLK Jr Ave. Brownfields (4) Phase I and II completed High Thurgood Marshall 2427 MLK Jr Ave. UST 10,000-gallon heating oil Medium Unknown 2429 MLK Jr Ave. UST No details Medium Unknown 2405 MLK Jr Ave. Brownfield No details High Electrical transformers South of 2405 MLK Jr Ave. Not listed No release documented Medium Salvation Army headquarters MLK Jr Ave. LUST Heating oil released to soil in 2007, UST closed High Distads Tire & Auto 2320 MLK Jr Ave. RCRAGN No details Medium Unknown 2321 MLK Jr Ave. UST No details Medium Unknown 2252 MLK Jr Ave. UST No details Medium Unknown 2225 MLK Jr Ave. UST No details Medium Parking lot 2201 MLK Jr Ave. UST (2) 3 gasoline USTs not in use Medium DC Lottery building 2101 MLK Jr Ave. UST 8,000-gal. heating oil UST, in use High Bank of America/Limited Partnership Associates 2100 MLK Jr Ave. RCRAGN, UST 2 waste oil USTs and 1 gasoline UST, out of use Medium Anacostia Lodge Building Corp MLK Jr Ave. UST 1,350-gal. heating oil UST, in use High Heung-Lho Yoon MD PC 2007 MLK Jr Ave. UST 240-gal. gasoline UST, out of use Medium Arch Development Corp MLK Jr Ave. UST (6) 550-gal. gasoline USTs, out of use Medium Hazardous Materials Technical Report Page 9

12 SITE NAME ADDRESS DATABASE DESCRIPTION OF RELEASE RISK Anacostia Drum site Street Bridge & Good Hope NFRAP (2) drums of unknown contents, No further remedial action required Low Unknown 1905 MKL Ave. Brownfield No details High Unknown 1901 MLK Jr Ave. Brownfield No details High American Oil Co Good Hope Rd. SE Brownfield, UST No details High Unknown 1205 Good Hope Rd. SE Brownfield No details High Unknown 1209 Good Hope Rd. SE Brownfield No details High Mandell Chevrolet Co./Wholesale Brownfield, UST, Bakery 1800 MLK Jr Ave. LUST Release of gasoline to soil in 1999 High Unknown 1209 Good Hope Rd. SE UST No details Medium Amoco/BP Service station 1234 Good Hope Rd. SE Brownfield, LUST, UST (4) 10,000-gal. gasoline USTs, gasoline release to groundwater in 2003 High Hazardous Materials Technical Report Page 10

13 Table 2: Release Sites and Risk Rankings for Alternative 4 SITE NAME ADDRESS DATABASE DESCRIPTION OF RELEASE RISK Amoco gas station MLK Jr Ave. & Howard Rd. ERNS Gas pump leaking slowly for a couple of months, reported in 1990 Medium Texaco/Chevron 2502 MLK Jr Ave. UST, LUST Reported in 1990 High Unknown 2500 MLK Jr Ave. Brownfields (4) Phase I and II completed High Thurgood Marshall 2427 MLK Jr Ave. UST 10,000-gallon heating oil Medium Unknown 2429 MLK Jr Ave. UST No details Medium Unknown 2405 MLK Jr Ave. Brownfield No details High Electrical transformers South of 2405 MLK Jr Ave. Not listed No release documented Medium Salvation Army headquarters MLK Jr Ave. LUST Heating oil released to soil in 2007, UST closed High Distads Tire & Auto 2320 MLK Jr Ave. RCRAGN No details Medium Unknown 2321 MLK Jr Ave. UST No details Medium Unknown 2252 MLK Jr Ave. UST No details Medium Unknown 2225 MLK Jr Ave. UST No details Medium Parking lot 2201 MLK Jr Ave. UST (2) 3 gasoline USTs not in use Medium DC Lottery building 2101 MLK Jr Ave. UST 8,000-gal. heating oil UST, in use High Bank of America/Limited Partnership Associates 2100 MLK Jr Ave. RCRAGN, UST 2 waste oil USTs and 1 gasoline UST, out of use Medium Anacostia Lodge Building Corp MLK Jr Ave. UST 1,350-gal. heating oil UST, in use High Heung-Lho Yoon MD PC 2007 MLK Jr Ave. UST 240-gal. gasoline UST, out of use Medium Arch Development Corp MLK Jr Ave. UST (6) 550-gal. gasoline USTs, out of use Medium Anacostia Drum site Street Bridge & Good Hope NFRAP (2) drums of unknown contents, No further remedial action required Low Unknown 1905 MKL Ave. Brownfield No details High Hazardous Materials Technical Report Page 11

14 SITE NAME ADDRESS DATABASE DESCRIPTION OF RELEASE RISK Unknown 1901 MLK Jr Ave. Brownfield No details High American Oil Co Good Hope Rd. SE Brownfield, UST No details High MPD old police station 1151 Chicago St. SE UST (2) 550-gal. gasoline USTs, not in use Medium Hungerford Printers 2207 Shannon Place SE RCRAGN Small quantity generator Low Curtis Properties, Inc Shannon Place SE UST 750-gal. gasoline UST, not in use Medium Curtis Properties, Inc Shannon Place SE UST 2,000-gal. gasoline UST, not in use Medium Hazardous Materials Technical Report Page 12

15 Table 3: Release Site and Risk Rankings for Alternative 5 SITE NAME ADDRESS DATABASE DESCRIPTION OF RELEASE RISK Amoco gas station MLK Jr Ave. & Howard Rd. ERNS Gas pump leaking slowly for a couple of months, reported in 1990 Medium Texaco/Chevron 2502 MLK Jr Ave. UST, LUST Reported in 1990 High Unknown 2500 MLK Jr Ave. Brownfields (4) Phase I and II completed High Thurgood Marshall 2427 MLK Jr Ave. UST 10,000-gallon heating oil Medium Unknown 2429 MLK Jr Ave. UST No details Medium Unknown 2405 MLK Jr Ave. Brownfield No details High Electrical transformers South of 2405 MLK Jr Ave. Not listed No release documented Medium Salvation Army headquarters MLK Jr Ave. LUST Heating oil released to soil in 2007, UST closed High Distads Tire & Auto 2320 MLK Jr Ave. RCRAGN No details Medium Unknown 2321 MLK Jr Ave. UST No details Medium Unknown 2252 MLK Jr Ave. UST No details Medium Unknown 2225 MLK Jr Ave. UST No details Medium Parking lot 2201 MLK Jr Ave. UST (2) 3 gasoline USTs not in use Medium DC Lottery building 2101 MLK Jr Ave. UST 8,000-gal. heating oil UST, in use High Bank of America/Limited Partnership Associates 2100 MLK Jr Ave. RCRAGN, UST 2 waste oil USTs and 1 gasoline UST, out of use Medium Anacostia Lodge Building Corp MLK Jr Ave. UST 1,350-gal. heating oil UST, in use High Heung-Lho Yoon MD PC 2007 MLK Jr Ave. UST 240-gal. gasoline UST, out of use Medium Arch Development Corp MLK Jr Ave. UST (6) 550-gal. gasoline USTs, out of use Medium (2) drums of unknown contents, No further Anacostia Drum site Street Bridge & Good Hope NFRAP remedial action required Low Hazardous Materials Technical Report Page 13

16 SITE NAME ADDRESS DATABASE DESCRIPTION OF RELEASE RISK Unknown 1905 MKL Ave. Brownfield No details High Unknown 1901 MLK Jr Ave. Brownfield No details High American Oil Co Good Hope Rd. SE Brownfield, UST No details High MPD old police station 1151 Chicago St. SE UST (2) 550-gal. gasoline USTs, not in use Medium Linens of the Week/Southeast Plant 1330 Railroad Ave. SE UST, LUST 10,000-gal. heating oil UST, 10,000-gal. gasoline UST, 1,000-gal. gasoline UST, and 800-gal. heating oil UST, not in use High Table 4: Release Sites and Risk Rankings for Alternative 9 SITE NAME ADDRESS DATABASE DESCRIPTION OF RELEASE RISK Linens of the Week/Southeast Plant 1329 Railroad Ave. SE UST, LUST 10,000-gal. heating oil UST, 10,000-gal. gasoline UST, 1,000-gal. gasoline UST, and 800-gal. heating oil UST, not in use High Star Vending Depot Good Hope Rd. SE UST 550-gal. UST, in use High Hazardous Materials Technical Report Page 14

17 Figure 2: Location of Hazardous Materials Adjacent to the Proposed Alternatives Hazardous Materials Technical Report Page 15

18 4.0 DIRECT AND INDIRECT IMPACTS Impacts from hazardous waste/materials were evaluated based on proximity of the proposed alternatives to the potential hazardous risk sites identified in Appendix D. Those potential hazardous materials sites directly adjacent to the proposed alternatives were identified as potential risk/impact areas. Table 5 identifies the number of high, medium, and low risk sites associated with each of the proposed alternatives. Table 5: Risk Ratings of Release Sites Associated with Each Alternative ALTERNATIVE HIGH RISK SITES MEDIUM RISK SITES LOW RISK SITES TOTAL Alternative Alternative Alternative Alternative Total Sites The operation of the streetcar under any of the proposed alternatives would not contribute OHMs or result in hazardous material releases to the environment. The majority of the streetcar elements proposed under each of the alternatives would be installed/constructed within the existing roadway right-of-way, on existing streets. The subsurface conditions under the streets are unknown; therefore it is possible that OHMs may be encountered during construction activities. In the event that OHMs are found, US EPA and the DDOE would be contacted. However, the relatively shallow excavations required for streetcar track installation significantly reduce the likelihood of encountering OHMs. The ten to twelve station stops would be located within the existing roadway right-of-way; therefore additional land acquisitions would not be required. Based on the selected alternative, however, additional land acquisitions may be required for corner clips, end of the line locations, and electrical sub stations; these sites would need to be assessed for the presence of RECs. Once the preferred alternative has been selected, the location of the electrical substations, corner clips and end of the line locations would be determined and a more in-depth assessment of these sites can be conducted at that time. 4.1 Mitigation Additional investigations for the presence of OHMs would be required to determine if mitigation would be necessary under the proposed alternatives. For release sites that are ranked as low-risk for potential impact, an updated review of agency files, environmental databases and public records should be revisited to determine if changes have occurred since the report was prepared. Further investigation, beginning with site-specific ASTM-compliant Phase I Environmental Site Assessments should be conducted at all medium- and high-risk rated Hazardous Materials Technical Report Page 16

19 properties prior to the installation or construction of the streetcar elements. If RECs are confirmed at these properties, further investigation in the form of subsurface soil and groundwater investigations and laboratory testing would be conducted. The mitigation requirements would depend upon the extent and nature of the hazardous waste/materials found, the construction activity proposed and the intended uses of the site. Hazardous Materials Technical Report Page 17

20 REFERENCES District of Columbia Office of Planning th Street Bridge FEIS (I-295/DC295) to the Southeast/Southwest Freeway (I-695), Washington D.C. Approved September 25, 2007 Department of Homeland Security 2010 Department of Homeland Security Headquarters Consolidation at St Elizabeth Master Plan Amendment - East Campus North Parcel Environmental Impact Statement, December Environmental FirstSearch Technologies (EFT) 2011 EFT, Environmental database report for hazardous materials release sites, July South Capital Street Draft Environmental Impact Statement/Section 4(f) Evaluation, January Hazardous Materials Technical Report Page 18