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PUBLIC HEALTH ASSESSMENT

POOLS PRAIRIE SITE
(a/k/a Neosho Wells)
NEOSHO, NEWTON COUNTY, MISSOURI


CONCLUSIONS

Residents were exposed to VOCs in their private wells for an unknown period of time until the fall of 1995 when bottled water was provided to lessen that exposure. Because contaminant levels are unknown for past exposures (possibly from 1956 until the fall of 1995), and consequently the amount of exposure residents received from their potentially VOC contaminated private wells for this time period is unknown, the Pools Prairie site is classified as an Indeterminate Public Health Hazard for past exposures. By April 1998, residents with contaminated private wells above or equal to the MCL had been provided a whole-house filtering system that eliminated their exposure to VOCs. The public water system, scheduled to be completed during the year 2000, will eliminate future exposures in the known and potentially contaminated areas as long as residents connect to the system. Because the exposure pathways were eliminated by the whole-house filtering system and, ultimately, by connection to the public water system, the Pools Prairie site is currently classified as a No Apparent Public Health Hazard for residents connecting to the public water supply. For those not connected/connecting to the public water supply, the Pools Prairie site is currently classified as a Public Health Hazard. The Pools Prairie site is classified as A Public Health Hazard for the future because: contaminated groundwater remains at the Pools Prairie site; some residents may not connect to the public water system and/or not properly maintain their whole-house filtration system; new wells may be drilled in the contaminated aquifer; the contamination plume may move or increase in concentration; and the source areas have yet to be remediated. These classifications are based on the following conclusions:

  1. Due to the lack of historical data on the levels of contamination residents may have been exposed to (from possibly as early as 1956 until the fall of 1995 when the groundwater contamination was discovered), it is not possible to assess that potential exposure or its health effects. However, based on the known recent past exposures since 1995, using an extremely conservative exposure scenario, the exposure to contaminated groundwater is not believed to have caused adverse health effects from past exposures.

  2. With the installation of the public water system, those residences with contaminated wells and those residents potentially affected in the areas of groundwater contamination will be assured of a safe long-term water supply, provided that residents connect to the system.

  3. Residents not connecting to the public water supply and residents outside the area supplied by the new public water system could be affected in the future if their private wells become contaminated. In addition, new wells for future residences drilled in the contaminated plume may allow residents to be exposed.

  4. High levels of contaminants are present at the source areas that have yet to be remediated, therefore, exposure may occur to remediation workers, trespassers, and others that may occupy or work on the site (including future construction, utility workers, etc.). Exposure could also occur if the area is developed or used for other purposes before it is completely remediated.

RECOMMENDATIONS

  1. Continue to take measures to eliminate exposure to contaminated groundwater at this site.

  2. Continue to take steps to mitigate the groundwater contamination.

  3. Sample private wells bordering the area supplied by the new public water system on a regular basis to monitor if the contamination plume has moved and may be affecting other residents.

  4. Take measures to prevent human exposure from the four source areas.

  5. Ensure that remediation workers are provided with and use the appropriate personal protection equipment and follow standard health protective procedures when working with the contaminated materials.

The Missouri Department of Health will review additional information when it becomes available and respond appropriately to any request for additional information or action.


PUBLIC HEALTH ACTION PLAN

The Public Health Action Plan (PHAP) for the Pools Prairie site contains a description of actions to be taken by the Missouri Department of Health (DOH), the Agency for Toxic Substances and Disease Registry (ATSDR), and others. The purpose of the PHAP is to ensure that this public health assessment not only identifies public health hazards, but provides an action plan to mitigate and prevent adverse human health effects resulting from past, present, and/or future exposures to hazardous substances at or near the site. Included is a commitment from DOH and/or ATSDR to follow up on this plan to ensure that it is implemented. The public health actions to be implemented by DOH, ATSDR and/or cooperators are as follows:

  1. DOH/ATSDR held a public availability session during the public comment period for the Pools Prairie Site Public Health Assessment (Public Comment Version) on December 14, 1999. The purpose was to present the public health assessment to the public, answer health questions they may have, and determine if there are additional health concerns. No additional health concerns were presented at the public availability session or received in the mail. Some technical comments were received and are addressed in Appendix D. The Pools Prairie Public Health Assessment will be available for public viewing at repositories in the area.

  2. DOH/ATSDR will coordinate with the appropriate environmental agencies to implement the recommendations in this public health assessment.

  3. DOH/ATSDR will provide follow-up to this PHAP as necessary. If a follow-up report is needed, it will be placed in the repositories that contain this public health assessment.

  4. DOH/ATSDR will evaluate any further data that become available about human exposure or contaminants at the site.

  5. DOH/ATSDR will discuss with the environmental agencies the need to conduct future sampling of private wells outside of the public water system to monitor the movement of the contamination plume to ensure that other residents aren't exposed.

PREPARERS OF THE REPORT

Arthur Busch
Environmental Specialist
Missouri Department of Health

Scott Clardy
Environmental Section Chief
Missouri Department of Health

Brian Quinn
Public Information Specialist
Missouri Department of Health


ATSDR Technical Project Officers

Roberta Erlwein
Environmental Health Scientist
Division of Health Assessment and Consultation

Dee Williamson
Epidemiologist
Division of Health Studies

Teresa Nastoff
Health Educator
Division of Health Education and Promotion


ATSDR Regional Representative

Denise Jordan-Izaguirre
Senior Regional Representative
EPA Region VII


REFERENCES

  1. Agency for Toxic Substances and Disease Registry. Health Consultation, Neosho Well TCE Site, Neosho, Newton County, Missouri. Atlanta: ATSDR, February 16, 1995.

  2. Missouri Department of Natural Resources. Expanded Site Inspection Report, Neosho Wells Site, Newton County, Missouri. September 27, 1996.

  3. Ecology and Environment, Inc., Superfund Technical Assessment and Response Team. Engineering Evaluation/Cost Analysis for the Pools Prairie Site, Neosho, Missouri. October 1997.

  4. U. S. Corps of Engineers. Trichloroethene (TCE) Results, Former Fort Crowder, Neosho, MO. Residential Sampling by Corp. of Engineers, K. C. District, Draft. Faxed April 16, 1997.

  5. Missouri Department of Natural Resources. Water Samples (Splits) Results of August 13, 1996 of Pools Prairie Residences. August 26, 1996.

  6. Agency for Toxic Substances and Disease Registry. Health Consultation, Neosho Wells, Neosho, Newton County, Missouri, Recommended Action Level. Atlanta: ATSDR, May 21, 1997.

  7. Agency for Toxic Substances and Disease Registry. Health Consultation, Neosho Wells, Neosho, Newton County, Missouri, Evaluation of Water Supply Method. Atlanta: ATSDR, July 31, 1997.

  8. Environmental Protection Agency. Fact Sheet, Pools Prairie Superfund Site, Neosho, Missouri. March 1998.

  9. Minutes of Pools Prairie Community Advisory Group Meeting. April 14, 1998.

  10. Environmental Protection Agency. Fact Sheet, Pools Prairie Superfund Site, Neosho, Missouri. February 1999.

  11. Telephone conversation with Brian Mossman, Rocketdyne Propulsion & Power on details of the Administrative Order of Consent for the Public Water System. October 21, 1999.

  12. Environmental Protection Agency. Administrative Order of Consent, Pools Prairie Site, Whole-House Treatment Unit Removal, EPA Docket No. VII-98-F-0004. February 27, 1998.

  13. Environmental Protection Agency. National Priorities List Site Narrative at Listing, Pools Prairie Site, Neosho, Missouri. January 19, 1999.

  14. Ecology and Environment, Inc. Memorandum to EPA, Removal Assessment Report: Pools Prairie Site (Quince Road Area), Neosho, Missouri (Formerly Neosho Wells Site). October 21, 1997.

  15. Environmental Protection Agency. Fact Sheet, Pools Prairie Superfund Site, Neosho, Missouri. May 1999.

  16. Ecology and Environment, Inc. Site Investigation Report of the Crowder College Test site located near Neosho, MO. TDD #R-07-8506-11A. July 7, 1986.

  17. Rust Environment & Infrastructure. Final, Site Investigation, Former Air Force Plant #65, Rocketdyne Test Site, Neosho, Missouri. December 1993.

  18. Ecology and Environment, Inc. Memorandum to EPA, Preliminary Assessment of Crowder College Test Site, Neosho, Missouri. TDD #R-07-8502-06. March 29, 1985.

  19. Ecology and Environment, Inc. Removal Assessment of the Neosho Wells Site, Neosho, Missouri. TDD: S07-9606-030B. March 1997.

  20. Telephone conversation Jalal El-Jayyousi, Missouri Department of Natural Resources, on present activities at the Engine Test Area and Component Test Area. October 21, 1999.

  21. Fluor Daniel GTI, Inc. Time Critical Removal Action Work Plan, Component Test Area, Pools Prairie Site, Neosho, Missouri. September 1998.

  22. Environmental Protection Agency. Fact Sheet, Pools Prairie Superfund Site, Neosho, Missouri. September 1998.

  23. Ecology and Environment, Inc. Memorandum to EPA, Site Investigation: Pools Prairie Site (Operable Unit #6 Sub-site), Neosho, Missouri (Formerly Neosho Wells) . TDD No.: S07-9805-019B. March 30, 1999.

  24. State of Missouri Official Manual. Missouri Cities and Counties Municipal Information. 1995-1996.

  25. U.S. Census Bureau. 1990 U.S. Census Data, Data Base C90STF3B. From Internet Data Base. July 7, 1998.

  26. Agency for Toxic Substances and Disease Registry. Geological Information System Spatial Analysis Activity for Neosho Wells, Neosho, Missouri. Atlanta: ATSDR, October 1998.

  27. Agency for Toxic Substances and Disease Registry. ATSDR Public Health Assessment Guidance Manual. Atlanta: ATSDR, 1993.

  28. Agency for Toxic Substances and Disease Registry. Toxicological Profile for Trichloroethylene, Update. Atlanta: ATSDR, September 1997.

  29. Agency for Toxic Substances and Disease Registry. National Exposure Registry Trichloroethylene (TCE) Subregistry Baseline Technical Report, Revised. Atlanta: ATSDR, December 1994.

  30. Agency for Toxic Substances and Disease Registry. National Exposure Registry Trichloroethylene (TCE) Subregistry Baseline Through Followup 3 Technical Report. Atlanta: ATSDR, October 1999.

  31. CDM Federal Programs Corporation. Final Site Investigation Summary Report, Round 1 Sampling Event, Fort Crowder, Neosho, Missouri. Contract No. DACW41-93-D-9004. March 1997.

  32. Agency for Toxic Substances and Disease Registry. Toxicological Profile for Carbon Tetrachloride, Update. Atlanta: ATSDR, May 1994.

  33. Agency for Toxic Substances and Disease Registry. Comparison Values Tables. Atlanta: ATSDR, Expires 3/31/2000.

  34. Environmental Protection Agency. Risk Assessment Guidance for Superfund, Volume 1, Human Health Evaluation Manual (Part A). EPA/540/1-89/002. December 1989. .

  35. American Cancer Society. Cancer Facts and Figures - 1995. American Cancer Society, Atlanta, Georgia. 1995

  36. Massachusetts Department of Health, Bureau of Environmental Health Assessment. Woburn Childhood Leukemia Follow-up Study, Final Report. July 1997.

CERTIFICATION

The Pools Prairie Public Health Assessment was prepared by the Missouri Department of Health under a cooperative agreement with the Agency for Toxic Substances and Disease Registry (ATSDR). It is in accordance with the approved methodology and procedures existing at the time the public health assessment was initiated.

Roberta Erlwein
Technical Project Officer, SPS, SSAB, DHAC

The Superfund Site Assessment Branch of the Division of Health Assessment and Consultation, ATSDR, has reviewed this public health assessment and concurs with its findings.

Lisa C. Hayes
Chief, SPS, SSAB, DHAC


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