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HEALTH CONSULTATION

MCLEAN COUNTY LANDFILL, INCORPORATED
BLOOMINGTON, MCLEAN COUNTY, ILLINOIS


DISCUSSION

IDPH compared the concentration of each chemical detected during sampling with appropriate comparison values used to select contaminants for further evaluation for carcinogenic and non-carcinogenic health endpoints. Chemicals at levels that exceed comparison values or those for which no comparison value exists are selected for further evaluation. A discussion of each of the health screening comparison values used is found in Attachment 4.

In August 1987, E&E collected five groundwater samples, one surface water sample, and six soil samples. Analytical results of on-site monitoring wells showed the presence of chromium, copper, lead, and cyanide. The surface water sample contained cadmium, manganese, and copper. Soil samples contained polycyclic aromatic hydrocarbons (PAHs), including phenanthrene and fluoranthene. None of these materials were found at levels exceeding comparison values.

The most recent samples collected by IEPA in November 1997 were from five on-site groundwater monitoring wells and one nearby residential well. The samples were tested for volatile organic compounds (VOCs), semivolatile organic compounds (SVOCs), pesticides, and inorganic compounds.

The results of groundwater analysis showed that VOC and SVOC concentrations did not exceed comparison values. Likewise, the analysis of pesticides did not detect any concentrations above the comparison values. Sodium was the only inorganic compound detected at elevated concentrations in the monitoring wells. However, this is only a concern for people with a history of high blood pressure who consume the water. The sodium concentration detected in the residential well was within recommended guidelines.

Surface water and soil data suggest that contaminants have been released from the landfill. However, because of the low concentrations detected and the lack of activity on the site, none of the contaminants would be expected to pose the potential for adverse health effects to individuals directly exposed through ingestion, inhalation, or dermal contact with on-site surface water and soil. Contaminants migrating to Sugar Creek should be greatly diluted before reaching any sensitive environments or drinking water intakes downstream.


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