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Summary of the Human-Health Risk Assessment for the Front Street site (OU1) and the Old City Dump (OU3):

Operable Unit OU1 (Front Street Site)

The Baseline Risk Assessment found that there are human-health risks associated with the contamination at the Front Street site (OU1). There are excess carcinogenic and adverse non-carcinogenic health risks associated with the use of ground water by future residents or occupational workers at OU1. In addition, there are excess carcinogenic health risks for future residents, for future and current occupational workers, for current trespassers, and for future recreational visitors from exposure to the soils at OU1. A summary of the carcinogenic human-health risk calculations and non-carcinogenic human-health risk calculations are listed in tables in the RI. The calculations are methods used in their preparation are described in detail in the Baseline risk assessment operable unit 1 (OU1)-Front Street, The Riverfront Site, New Haven, Franklin County, Missouri: prepared by the Missouri Department of Health and Senior Services in Jefferson City, Missouri.

Operable Unit OU3 (old City Dump)

Baseline Risk Assessment scenarios for OU3 found that there are human-health risks associated with the contamination at OU3, but human-health risks were not related to PCE contamination. Antimony and boron were detected in a ground-water seep from the landfill, and if ground water from this seep were ingested, it would pose an excessive non-carcinogenic health risk. However, it is unlikely that the ground-water seep would be used as a drinking water source in the future. The human-health risks are considered minor. Surface soil sample results were not analyzed because it was felt that they were not representative samples. The human-health risks associated with surface soils at OU3 are unknown.

References:

Missouri Department of Health and Senior Services, 2003, Baseline risk assessment operable unit 1 (OU1)-Front Street, The Riverfront Site, New Haven, Franklin County, Missouri: Jefferson City, Missouri.

Missouri Department of Health and Senior Services, 2003, Baseline risk assessment operable unit 1 (OU3)-old City Dump, The Riverfront Site, New Haven, Franklin County, Missouri: Jefferson City, Missouri.

U.S. Environmental Protection Agency, 2003, Focused remedial investigation of operable units OU1 and OU3, Riverfront Superfund Site, Franklin County, Missouri: U.S. Environmental Protection Agency Region VII, DW1495217301-2, Kansas City, Kansas.

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