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After a review of the information available, IDPH concludes:

1. Conditions at the Lake Landfill site do not pose a current public health hazard, but do pose a future public health hazard if levels of on-site groundwater contamination migrates to private well water used by the surrounding population. Sampling activities at the site have confirmed the presence of contaminants from past disposal activities at the site. Site-related groundwater contamination has been detected in on-site groundwater samples at elevated levels, but there is no completed exposure pathway since the water is not used. Site-related contaminants have not been detected in off-site, downgradient residential wells, but the potential for future contamination exists. If contaminants do migrate to private well water, the resulting exposures would need to be evaluated to determine if the exposure could result in adverse health effects.

2. The groundwater and drainage from the site flow toward and enter the Little Wabash River. This runoff has the potential to result in site-related contamination of the river. Drinking water intakes are 30 miles downstream and should not be affected if some contamination enters the river.

3. Access to the site is not restricted. Although the on-site surface soil data is limited, areas of leachate seeps have been noted on the site. Additionally, a final soil cover was not installed and exposed refuse material is present. Recreational use of the site has occurred in the form of hunting activities and all-terrain vehicle use.


IDPH Recommends:
  1. Further characterizing groundwater conditions at the site to learn the extent of the contamination.

  2. Continued monitoring of residential downgradient wells to ensure contamination has not migrated to those wells, thereby putting residents at risk of exposure.

  3. Install diversionary measures on the site to prevent leachate runoff from draining into the Little Wabash River.

  4. Restrict access to the site until contamination is better defined and exposed refuse material is properly covered.

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