{- •j SDMS DocID 51631 Superfund Records Center SITE: BREAK: S.H- OTHER: ; RECORD OF DECISION SOURCE CONTROL OPERABLE UNIT Site 01 - McAllister Point Landfill Naval Education and Training Center Newport, Rhode Island DECISION SUMMARY FOR THE RECORD OF DECISION Site 01 - McAllister Point Landfill / Naval Education and Training Center ^ . Newport, Rhode Island TABLE OF CONTENTS Contents Page Number DECLARATION FOR THE RECORD OF DECISION 1 I. SITE NAME, LOCATION AND DESCRIPTION 1 II. SITE HISTORY AND ENFORCEMENT ACTIVITIES 1 A. Land Use and Response History 1 B. Enforcement History 5 m. COMMUNITY PARTICIPATION 6 IV. SCOPE & ROLE OF RESPONSE ACTION ^ 6 V. SUMMARY OF SITE CHARACTERISTICS 7 VI. SUMMARY OF SITE RISKS 8 VII. DEVELOPMENT AND SCREENING OF ALTERNATIVES 13 A. Statutory Requirements/Response Objectives 13 B. Technology and Alternative Development and Screening 13 Vm. DESCRIPTION OF ALTERNATIVES 14 IX. SUMMARY OF THE COMPARATIVE ANALYSIS OF ALTERNATIVES 16 X. THE SELECTED REMEDY 20 A. Cleanup Levels 20 B. Description of the Remedial Components 20 XI. STATUTORY DETERMINATIONS 26 A. The Selected Remedy is Protective of Human Health and the Environment 26 B. The Selected Remedy Attains ARARs 26 C. The Selected Remedial Action is Cost Effective 30 D. The Selected Remedy Utilizes Permanent Solutions and Alternative Treatment or Resource Recovery Technologies to the Maximum Extent Practicable 30 E. The Selected Remedy Does Not Satisfy the Preference for Treatment Which Permanently and Significantly Reduces the Toxicity, Mobility or Volume of the Hazardous Substances as a Principal Element 31 Xn. DOCUMENTATION OF SIGNIFICANT CHANGES 31 Xffl. STATE ROLE 31 DECISION SUMMARY FOR THE RECORD OF DECISION Site 01 - McAllister Point Landfill Naval Education and Training Center Newport, Rhode Island TABLE OF CONTENTS fContinued^ Appendices APPENDIX A - RISK ASSESSMENT TABLES APPENDIX B - RESPONSIVENESS SUMMARY APPENDIX C - ARARs ASSESSMENT APPENDIX D - ADMINISTRATIVE RECORD INDEX APPENDIX E - STATE LETTER OF CONCURRENCE LIST OF FIGURES Figure No. Title Page Number 1 NETC Site Location Map 2 2 McAllister Point Landfill - Site Location Map 3 3 Site Plan 4 4 Proposed Landfill Cap Area 21 5 Conceptual Cap Section 22 6 Conceptual Slope Protection with Seaward Erosion Protection 24 DECLARATION FOR THE RECORD OF DECISION .SITE NAME AND LOCATION Sits 01 - McAllister Point Landfill Naval Education and Training Center (NETC) Newport, Rhoce Island STATEMENT OF BASIS AND PURPOSE This decision document presents the selected source control remedial action for Site 01 - McAllister Point Landfill, at the Naval Education and Training Center (NETC) located in Newport, Rhode Island. This decision document was developed 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 with the National Oil and Hazardous Substances Pollution Contingency Plan (NCP). Through this document, the Navy plans to remedy the threat to human health and the environment posed by the presence of the landfill through the implementation of a source control action. This decision is based upon the contents of the Administrative Record for Site 01. The administrative record is available at the Naval Education and Training Center in Newport, Rhode Island. Both the United States Environmental Protection Agency and the Rhode Island Department of Environmental Management concur with the selected remedial action. ASSESSMENT OF THE SITE Actual or threatened releases of hazardous substances from this site, if not addressed by implementing the response action selected in this Record of Decision (ROD), may present a current or potential threat to human health and the environment. DESCRIPTION OF THE SELECTED REMEDY This remedy is the first of two operable units for the site and addresses source control. A management of migration operable unit will subsequently be developed for the site. The selected remedy addresses remedianon of the source of contamination at the McAllister Point Landfill site by eliminating or reducing the risks posed by the presence of the landfill at the site. This action is intended to be the permanent source control remedy for Site 01 and will be combined with a management of migration remedial alternative at a later date, if required. A Record of Decision will be issued for the management of migration operable unit prior to the commencement of construction of the source control operable unit remedial action. The major components of the selected remedy include: • Capping of the site with a RCRA Subtitle C multi-layer cap. • • Landfill gas controls to manage landfill gas migration. • Surface controls to minimize erosion and manage runoff. i • Use of fencing and deed restrictions to control site access and future site use. • Provisions for conducting additional studies, including determining if additional measures, beyond capping, must be taken to reduce the amount of ground water in contact with the contaminated materials of the landfill; the nature and extent of ground water contamination and whether additional measures, beyond capping, are necessary to meet federal or state ground water standards and to reduce to acceptable levels any unacceptable risks to human health or the environment from ground water contamination; whether hot spots within the landfill materials, if present, will need to be addressed by a separate remedial action or can be addressed by the landfill cap; and the nature and extent of any near-shore sediments which have been affected by site-related contamination, and whether they will need to be addressed by a separate remedial action or whether they can be addressed through consolidation under the landfill cap. • Five-year review. STATUTORY DETERMINATIONS The selected remedy is protective of human health and the environment, complies with Federal and State requirements that are applicable or relevant and appropriate to the remedial action, and is cost-effective. This source control remedial action utilizes permanent solutions and alternative treatment technologies to the maximum extent practicable. The selected remedy does not satisfy the statutory preference for remedies that employ treatment that reduces toxicity, mobility, or volume as a principal element because treatment of the entire landfill area is impracticable. The selected remedy will reduce mobility of contaminants through its containment features. Because this remedy will result in contaminants remaining at the site above levels that allow for unlimited use and unrestricted exposure, the Navy will review the remedial action to the extent required by law, to assure that it continues to protect human health and the environment. The foregoing rerresents the selection of a remedial action by the Department of the Navy and the tj.S. Environmental Prctsenon Agency, Region I, with concurrence of the Rhode Island Decamnent of Environmental Management. Concur and recommend for immediate implementation; Date: CroapPN. J. panarozzi Captain, U.S. Navy Coroinancng Officer Naval Emanation and Training Center Newport, Rhode Island iii The foregoing represents the selection of a remedial action by the Department .of the Navy and the U.S. Environmental Protection Agency, Region I, with concurrence of the Rhode Island Department of Environmental Management. By: ffcLuJt Date: Paul G. Keough Title: ' Acting Regional Administrator, Region I, USEPA iv DECISION SUMMARY I. SITE NAME, LOCATION AND DESCRIPTION The U.S. Naval Education and Training Center (NETC) Newport is a National Priorities List (NPL) site. There are currently four areas of contamination (AOC) and six study areas (S As) within NETC Newport that are under investigation. This Record of Decision (ROD) relates to the presence of the existing landfill area at McAllister Point as a source of contamination. Portions of the NETC facility are located in Newport, Middletown, and Portsmouth, Rhode Island. The facility layout is long and narrow, following the shoreline of Aquidneck Island for nearly 6 miles bordering Narragansett Bay. A facility location map is provided on Figure 1. McAllister Point Landfill is located in the central portion of the facility, in the town of Middletown, Rhode Island, as shown in Figure 2. The McAllister Point Landfill site covers approximately 11.5 acres and is situated between Defense Highway and Narragansett Bay. Penn Central Railroad tracks run in a north-south direction along the eastern side of the site, parallel to Defense Highway. Access to the site is from Defense Highway in the south-central portion of the site. The layout of the site is depicted in Figure 3. Grass, weeds, and small trees cover most of the site. A small, lightly wooded area is present in the north- central portion of the site. A more mature wooded area is located near the northeastern edge of the site between the railroad tracks and Defense Highway. Several depressions are present in the central portion of the site where standing water collects during heavy precipitation events. A wetlands evaluation summary has been conducted at the site and is available as part of the Administrative Record. The Flood Insurance Rate Map (FEMA, 1984) which covers the site and surrounding area indicates the shoreline of the site lies within the 100- year coastal flood area. The western edge of the site along Narragansett Bay is a coastal bank that rises 10 to 15 feet above Mean Low Water. The areas of 100-year coastal flood in the vicinity of the site is 12 feet, and wave action may reach 17 feet. At high tide the beach is only about 10 feet in width while at low tide it may be as much as 50 feet wide. Metal debris and concrete rubble are present along the shoreline of the landfill. The presence of the concrete rubble and debris appears to have decreased the potential for erosion of the shoreline landfill slopes. A more complete description of the site can be found in the Draft Final Focused Feasibility Study (FFS) on pages 1-10 and 1-11 (TRC, 1993). n. SITE HISTORY AND ENFORCEMENT ACTIVITIES A.