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MDNR's Preliminary Assessment of Rivet Mile/USAF site indicated past use and the possible release of environmental contaminants at the site. Residents living near the site depend on private wells for their drinking water and local residents could be exposed to site-related contaminants through various pathways, particularly groundwater.

To determine if people were being exposed to contaminants in groundwater through their private wells, DOH and MDNR collected water samples from residences nearest and to the west of the site. No residences are located within approximately a half mile in the other directions from the site. A water sample was also collected from the elementary school. Further, agency representatives gathered information about the site's history, use, and other pertinent information from residents.

Groundwater samples were analyzed for bacteriological, metals (cadmium, chromium, lead), nitrate, and volatile organic compounds contamination. The results indicated that no site-related contaminants were detected and other normal groundwater contaminants (i.e. nitrate) were well within safe drinking water standards (5). Further, the investigation revealed no other pathway through which residents could become exposed to site-related contaminants (4).

As for the school, results from previous sampling (conducted in 1991, 1992, and 1993) showed trace amounts of toluene above the laboratory's detectable limit, but not above health concern in their private well water (1). However, samples taken during the February 21, 1996, DOH/MDNR survey indicated that toluene was undetectable (4).

Because no in-depth sampling has been conducted at the Rivet Mile site, there is a data gap about whether contamination is present on site, its location, and the levels at which the contamination might exist (6).


  1. Limited sampling of residential wells near the site showed none of the wells to be contaminated.

  2. The literature documents what chemicals were used during the USAF's use of the site, but it is not clear whether the chemicals were released into the environment. No environmental sampling has been completed on site to determine if contamination is present. Therefore, it is possible that chemical contamination could still be present in on-site soil and groundwater.

  3. Because this site has not been fully evaluated, more complete environmental sampling should be conducted before it can be accurately determined whether the site presents a health risk to on-site workers and/or to nearby residents.

Hazardous chemicals were known to have been used on site. There are reports of stained areas and the possibility of other buried underground storage tanks on site. Disposal methods for the hazardous chemicals are not known, and there has been no sampling to confirm or deny the presence of contamination. The site could pose a potential health hazard for employees working on the site.


  1. Conduct further evaluation of the site to determine if any on-site contamination exists, especially in the surface soil and on-site groundwater.

  2. If on-site contamination exists, determine whether it is affecting or could affect on-site workers or nearby residents.


Arthur Busch and Brian Quinn
Missouri Department of Health

The information presented in this health consultation, along with the conclusions and recommendations, are based on the information referenced. They relate only to the ALC/Rivet Mile-USAF site and should not be applied to any other site or situation. When additional information becomes available, it will be thoroughly evaluated, and existing assessment documents will be updated to reflect any changes. DOH/ATSDR will respond appropriately to any request for additional information or action.


This Health Consultation for the ALC/Rivet Mile-USAF site and adjoining residences 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 approved methodology and procedures existing at the time the health consultation was initiated.

William Greim
Technical Project Office, SPS, SSAB, DHAC

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

Richard Gillig


  1. Missouri Department of Natural Resources. Preliminary Assessment Report, 00-ALC/Rivet Mile USAF, Pettis County, Missouri. January 5, 1996.

  2. Telephone conversation with Environmental Protection Agency Remedial Project Manager. November 4, 1997.

  3. Allied Enviro Engineering, Inc. Underground Storage Tank Site Closure Report for Rivet Mile/Owl Industries, Dresden, Missouri. February, 1990.

  4. Missouri Department of Natural Resources. Memorandum, Site Visit with Missouri Department of Health to 00-ALC/Rivet Mile/USAF Site file. April 10, 1996.

  5. Missouri Department of Health. Letters to residences providing results of private well sampling, Rivet Mile/USAF Site, Dresden, Missouri. March 14, 1996.

  6. Missouri Department of Natural Resources. Letter to Tyson Foods, Inc. April 18, 1996.

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