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PUBLIC HEALTH ASSESSMENT

TRAVIS AIR FORCE BASE (AFB)
UNITED STATES AIR FORCE
SOLANO COUNTY, CALIFORNIA


PREPARERS OF REPORT

Jeffrey A. Kellam
Environmental Health Scientist
Federal Facilities Assessment Branch
Division of Health Assessment and Consultation

William Deviny
Regional Representative
ATSDR Region 9


PUBLIC HEALTH ACTION PLAN

Conclusions

1. Dieldrin has been found in baitfish collected from the "Duck Pond". Because this chemical can accumulate in fatty tissue and magnify up the food chain, there is potential for adverse health effects if sufficient quantities of contaminated fish are regularly consumed. There is currently no information available about levels in edible fish, or concerning use patterns at the duck pond that could be used to evaluate the actual potential for harmful exposure. No analyses have been performed on edible fish from the Duck Pond, and no information is available on angler usage of this water body. It is not likely that fish are being consumed in sufficient quantities on a frequent basis, so it is unlikely that a health hazard would result from infrequent consumption of small amounts of edible fish for this water body. However, until information is collected that verifies usage or contaminant levels in edible fish, this exposure situation is considered an indeterminate public health hazard.

2. Sampling and analyses of indoor air conducted in May of 1998 indicated that air quality was within the OSHA requirements. Although this does not definitively determine whether soil gas might be migrating from the spill area, there are no air contaminant levels of concern, regardless of source, in buildings 810, 844 and 845 . For this reason, this exposure situation is considered no apparent public health hazard.

3. Although VOCs were detected in the crawlspaces under trailers located above the former Landfill 1, concentrations detected present no apparent public health hazard.

4. Based on an evaluation of the risk assessment conducted for Travis AFB on the possible migration of hydrocarbons, in the form of soil gas, from the base gasoline stations to nearby buildings, it does not appear likely that a public health hazard exists. Ongoing and planned remediation activities will eliminate the possibility of further migration of contaminants. For these reasons, this exposure situation is considered no apparent public health hazard.

5. Groundwater contaminant plumes extending off-base have not reached private water wells. Remediation activities are under way to extract contaminants from groundwater in this area, decreasing the likelihood that contaminants could reach private wells in the future. For these reasons potential exposure situations involving groundwater contamination at Fire Training Area 4, Landfill 2 and Building 1125 present no apparent public health hazard.

6. The contaminant levels detected in water and biota in Union Creek downstream of the base do not appear to present a public health hazard. Incidental contact with water in Union Creek is not likely to present a public health hazard. No analyses have been performed on edible fish, and no information is available on angler usage of this water body. However, it is not likely that fish are being consumed in sufficient quantities on frequent basis, and it is unlikely that a health hazard would result from infrequent consumption of small amounts of edible fish for this water body. For this reason this exposure situation is considered no apparent public health hazard.

7. Studies of the 1950 B-29 crash have shown that no radionuclides above what would be expected to occur naturally are present in the area of the crash. For this reason, this exposure situation is considered no public health hazard.

8. Studies in Grazing Areas 7 and 8 and in Landfill X have not detected chemical contaminants that could result in public health hazards. This exposure situation is considered no public health hazard.

Actions Taken or Planned

1. Environmental sampling and analysis undertaken at Travis AFB have generally provided a clear picture of the nature and extent of contamination in the environment.

2. An indoor air evaluation will be conducted by Travis AFB as soon as possible in Buildings 810, 844 and 845 to confirm whether migration into these buildings of TCE and TPH from soil gas plumes has occurred at levels that would present a public health hazard. TCE and TPH screening will be incorporated into future sampling events.

3. Monitoring by Travis AFB for groundwater contamination is ongoing and will serve to verify the effectiveness of remediation activities at the following three sites:

    a. Fire Training Area 4,
    b. Building 1125, and
    c. Landfill 2.

If plumes are seen to expand during this monitoring, additional treatment systems will be constructed.

4. Institutional controls in place (fencing, signs, security personnel) limit the possibility of exposure to contamination present at Travis AFB.

Actions Recommended

1. Travis AFB will, as soon as possible, develop the following tiered approach to evaluating the possibility of a health hazard at the duck pond:

    a. survey the Duck Pond for edible fish,
    b. if the pond contains an appreciable quantity of edible fish, information on the amounts of consumption of fish will be collected to determine if any anglers are catching and eating fish frequently,
    c. if there is frequent consumption of fish, tissue sample analyses will be conducted to determine existence or level of contamination,
    d. if contamination is found in fish, appropriate measures (catch and release, advisories suggesting limited consumption, public education) will be taken to restrict or eliminate consumption of fish from the Duck Pond.

2. Travis AFB should continue to monitor the extent of the soil gases in the vicinity of Buildings 810, 844 and 845, to verify that thye are not migrating into areas where they could present a public health hazard.


REFERENCES

  1. Parsons Engineering Sciences, Inc., 1996, Management Action Plan Travis Air Force Base, Fairfield, California, January 1996.

  2. Bureau of the Census, 1991, Census of Population and Housing, 1990: Summary Tape File 1A (California) [machine-readable data files]

  3. CH2M Hill, 1997, Draft Final Travis AFB WABOU Remedial Investigation, April 18, 1997.

  4. Travis AFB, Public Affairs Office, 1995, Environmental Investigations at the B-29 Crash Site, July 1995.

  5. Armstrong Laboratory (AFMC), 1994, Radiological Field Investigation of the Historic B-29 Crash, Travis AFB CA, June 17, 1994.

  6. CH2M Hill, 1993, Memorandum Report, Fish at Travis AFB Boundary, September 30, 1996.

  7. ATSDR, 1993, Toxicological Profile Update for Aldrin/Dieldrin, April 1993.

  8. Headquarters 60th Air Mobility Wing (AMC), Order of the Commander, TAFB Instruction 32-101, Hunting and Fishing on Travis AFB, 30-Oct-1995.

  9. San Francisco Regional Water Quality Control Board, 1995, Contaminant Levels in Fish Tissue from San Francisco Bay, Final Report, San Francisco Regional Water Quality Control Board, State Water Resources Control Board, California Department of Fish and Game, June 1995.

  10. Radian International, 1997, Groundwater Interim Record of Decision, Travis Air Force Base, Preliminary Draft Final, August 20, 1997.

  11. Clayton Laboratory Services, 1998, Analytical Results for the United States Air Force, Clayton Project No. 98052.00, May 21, 1998.

  12. Radian Corporation, 1995, Final Remedial Investigation North Operable Unit, Travis Air Force Base, Volume 1, July 1995.

  13. Roy F. Weston, Inc., 1994, Results of December, 1993, Resident Well Sampling, April 5, 1994.

  14. Radian Corporation, 1997, SS30 (MW-269 Area) Plume Delineation Report, Travis Air Force Base, January 8, 1997.

  15. Roy F. Weston, Inc., 1995, Travis Air Force Base Final Remedial Investigation Report East Industrial Operable Unit, October 1995.

  16. Radian Corporation, 1996, Final Remedial Investigation, West Industrial Operable Unit, February 26, 1996.

  17. McNab, Jr., Walt W. et al, 1997, Draft Final Assessment of Appropriate Fuel Hydrocarbon Cleanup Strategies of Travis Air Force Base, Fairfield, California Using a Risk-Based Approach, UCRL-AR-125941 DR, Lawrence Livermore National Laboratory, March 1997.

  18. HazardText, 1997, HazardText Database.

  19. CHRIS, 1997, Chemical Hazard Response Information System database, 1997.

  20. ATSDR, 1993, Toxicological Profile for Benzene, Update, April 1993.

  21. ATSDR, 1997, Health Consultation Paw Creek Bulk Petroleum Terminal (CRS#A277), Charlotte, Mecklenburg County, North Carolina, March 12, 1997.

  22. San Francisco Regional Water Quality Control Board, 1997, Human Health Risks at Union Creek, Travis AFB, Aug 29, 1997.

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