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  • U.S. DEPARTMENT OF THE NAVY INSTALLATION RESTORATION PROGRAM

    NAVAL AIR STATION BRUNSWICK BRUNSWICK, MAINE

    FINAL RECORD OF DECISION

    FOR SITE 2

    SEPTEMBER 1998

  • U.S. DEPARTMENT OF THE NAVY INSTALLATION RESTORATION PROGRAM

    NAVAL AIR STATION BRUNSWICK BRUNSWICK, MAINE

    FINAL RECORD OF DECISION

    FOR SITE 2 AT

    NAVAL AIR STATION BRUNSWICK BRUNSWICK, MAINE

    Preparedfor

    U.S. Department of the Navy Northern Division

    Naval Facilities Engineering Command Contract No. N62472-91-C-1013

    Prepared by

    Harding Lawson Associates Portland, Maine 04112 Project No. 9219-02

    SEPTEMBER 1998

  • NAVAL AIR STATION BRUNSWICK RECORD OF DECISION

    SITE 2

    TABLE OF CONTENTS

    Contents Page No

    DECLARATION 1

    DECISION SUMMARY 4 I SITE NAME, LOCATION, AND DESCRIPTION 4 H SITE HISTORY AND ENFORCEMENT ACTIVITIES 6

    A LAND USE AND SITE HISTORY 6 B RESPONSE AND ENFORCEMENT HISTORY 6

    m COMMUNITY PARTICIPATION 8 IV SCOPE AND ROLE OF RESPONSE ACTION 9 V SUMMARY OF SITE CHARACTERISTICS 10 VI SUMMARY OF SITE RISKS 13

    A HUMAN HEALTH RISK ASSESSMENT 13 B ECOLOGICAL RISK ASSESSMENT 14

    VH DEVELOPMENT AND SCREENING OF ALTERNATIVES 15 A STATUTORY REQUIREMENTS/RESPONSE OBJECTIVES 15 B TECHNOLOGY AND ALTERNATIVE DEVELOPMENT AND SCREENING 15

    VIE DESCRIPTION OF ALTERNATIVES 16 A No ACTION 16 B MINIMAL ACTION 16

    LX SUMMARY OF THE COMPARATIVE ANALYSIS OF ALTERNATIVES 18 A OVERALL PROTECTION OF HUMAN HEALTH AND THE ENVIRONMENT 18 B COMPLIANCE WITH APPLICABLE OR RELEVANT AND APPROPRIATE

    REQUIREMENTS 18 C LONG-TERM EFFECTIVENESS AND PERMANENCE 19 D REDUCTION OF TOXICFTY, MOBILITY, OR VOLUME THROUGH TREATMENT 19 E SHORT-TERM EFFECTIVENESS 19 F iMPLEMENTABILrrY 20

    G COST 20 H STATE ACCEPTANCE 21 I COMMUNITY ACCEPTANCE 21

    X THE SELECTED REMEDY 22 A iNSTrrunoNAL CONTROLS 22 B REMOVAL OF SURFACE DEBRIS 22 C ADDITIONAL GROUNDWATER MONITORING WELL 22

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  • NAVAL AIR STATION BRUNSWICK RECORD OF DECISION

    SITE 2

    TABLE OF CONTENTS continued

    Contents _ Page No.

    D. ENVIRONMENTAL MONITORING ..................................................................... 22 E. FIVE YEAR REVIEWS ...................................................................................... 23 F. COST ............................................................................................................... 23

    XI. STATUTORY DETERMINATIONS ................................................................ 25 A. THE SELECTED REMEDY is PROTECTIVE OF HUMAN HEALTH AND THE

    ENVIRONMENT ............................................................................................... 25 B. THE SELECTED REMEDY ATTAINS ARARs ..................................................... 25 C. THE SELECTED REMEDIAL ACTION is COST-EFFECTIVE ................................. 25 D. THE SELECTED REMEDY UTILIZES PERMANENT SOLUTIONS AND

    ALTERNATIVE TREATMENT OR RESOURCE RECOVERY TECHNOLOGIES TO THE MAXIMUM EXTENT PRACTICABLE .......................................................... 25

    E. THE SELECTED REMEDY SATISFIES THE PREFERENCE FOR TREATMENT WHICH PERMANENTLY AND SIGNIFICANTLY REDUCES THE TOXICITY, MOBILITY, OR VOLUME OF THE HAZARDOUS SUBSTANCES AS A PRINCIPAL ELEMENT ..................................................................................... 26

    DOCUMENTATION OF NO SIGNIFICANT CHANGES ............................. 27 . STATEROLE .................................................................................................. 28

    GLOSSARY OF ACRONYMS AND ABBREVIATIONS

    REFERENCES

    APPENDICES

    APPENDIX A- RESPONSIVENESS SUMMARY AND PUBLIC MEETING TRANSCRIPT

    APPENDIX B - MEDEP LETTER OF CONCURRENCE APPENDIX C - APPLICABLE OR RELEVANT AND APPROPRIATE

    REQUIREMENTS APPENDIX D - ADMINISTRATIVE RECORD INDEX AND GUIDANCE

    DOCUMENTS

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  • NAVAL AIR STATION BRUNSWICK RECORD OF DECISION

    SITE 2

    LIST OF FIGURES

    Figure Page No

    1 Site Location Map 5 2 Site Features 11

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    iii

  • DECLARATION

    SITE NAME AND LOCATION

    Naval Air Station (NAS) Brunswick Orion Street Landfill (South): Site 2 Brunswick, Maine

    STATEMENT OF BASIS AND PURPOSE

    This decision document presents the selected final remedy for Site 2 at NAS Brunswick. This decision document was developed in accordance with the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) of 1980, as amended by the Superfund Amendments and Reauthorization Act (SARA) of 1986, and to the extent practicable, the National Oil and Hazardous Substances Pollution Contingency Plan (NCP). The remedy selected is based on information contained in the Administrative Record for the site which was developed in accordance with Section 113(k) of CERCLA, and is available for public review at the information repositories located at the Public Works Office at NAS Brunswick and the Curtis Memorial Library, 23 Pleasant Street, Brunswick, Maine.

    The State of Maine Department of Environmental Protection (MEDEP) concurs with the selected remedy for Site 2.

    ASSESSMENT OF THE SITE

    The Navy has determined that the Minimal Action Alternative is appropriate for Site 2 since risk estimates are below U.S. Environmental Protection Agency (USEPA) and MEDEP target risk levels. Investigations conducted at Site 2 in 1984 (E.G. Jordan Co., 1985) and in 1988-89 (E.G. Jordan Co., 1990a) have shown that soil, groundwater, and surface water pose no unacceptable risks. Low levels of inorganic constituents such as mercury and lead were detected in sediment and leachate samples at Site 2, but are below target risk levels. Geophysical investigations determined that unidentified metal debris is present throughout the landfill.

    DESCRIPTION OF THE SELECTED REMEDY

    The Navy and USEPA, with the concurrence of MEDEP, have determined that the selected remedy for Site 2 is Minimal Action. Implementation of the Minimal Action Alternative would include the following activities:

    • institutional controls, including maintenance of the existing fence, installation of warning signs and land use restrictions. Land use restrictions shall be documented in the NAS Brunswick Operations Instructions for site development which require

    Installation Restoration Program

    fiilrod2.doc 1 9219-02

  • environmental review. Should NAS Brunswick ever close and/or transfer this property, USEPA and MEDEP shall be notified and appropriate wording shall be included in the necessary real estate documents.

    • removal of surface debris that is visible in the depression immediately south and east of the landfill;

    • installation of an additional groundwater monitoring well;

    • environmental monitoring, including collection and analysis of samples of groundwater, seeps, surface water and sediment;

    • five-year site reviews; and

    • modifications to the selected remedy, if necessary.

    At least once every five years, the Navy will perform a review of the monitoring data to be presented in a report. The report will recommend either to continue the minimal action activities or to make modifications to the selected remedy. In addition to the five-year reviews, monitoring data will also be evaluated more frequently by a process to be outlined in the long-term monitoring plan. Data will be reviewed at quarterly Restoration Advisory Board meetings, where decisions for more immediate actions can be made, if necessary.

    STATUTORY DETERMINATIONS

    The selected remedy meets the mandates of CERCLA Section 121. It protects human health and the environment, complies with federal and state requirements that are legally applicable or relevant and appropriate for this action, and is cost-effective. The selected remedy does not satisfy the statutory preference for treatment as a principal element. Treatment is unnecessary at this site since current risk estimates are below USEPA and MEDEP target risk levels. However, because MEDEP has expressed a concern that unidentified debris within the landfill may create a potential for future impacts to groundwater and/or surface water, an environmental monitoring plan will be developed to evaluate changes in the site's condition.

    A review will be conducted by the Navy, USEPA, and MEDEP at intervals not to exceed every five years to ensure that the remedy continues to provide adequate protection of human health and the environment. This review will evaluate the appropriateness of a Minimal Action decision for Site 2.

    Installation Restoration Program

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  • DECLARATION

    This Record of Decision represents the selection of a Minimal Action under CERCLA for Site 2 The foregoing represents the selection of a remedial action by the Department of the Na\y, and the U S Environmental Protection Agency Region I. with concurrence of the Maine D e p a r t m e n t of Environmental Protection

    Concur and recommend for immediate implementation

    Department of the Navy

    By a - - _ Date E F Carter, Jr. ' Captain, U.S. Na\ Commanding Officer Naval Air Station Brunswick, Maine

    United States Environmental Protection Agency ^ ^ ) -7- < /- - , , ,

    By v —^Z's ; --^'^^ -^ ' -/^ ./.,- Date-. Patricia L Meaney Director Office of Site Remediation and Restoration Reeion I

    Installation Restoration Program

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  • DECISION SUMMARY

    I. SITE NAME, LOCA