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Riverfront Site (OU-1)

		The Riverfront Site (OU-1) is located in the eastern part of downtown New Haven. The site is underlain by the Missouri River alluvial aquifer (about 30 feet thick at the site). The principle feature of the site is a one-story industrial building (Riverfront building). Ground-water is being investigated at the site and beneath adjacent private and city owned land. The ground-water monitoring network at OU-1 includes 7 alluvial monitoring wells (TW prefix) and 4 bedrock monitoring wells (BW prefix).
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The Riverfront Site (OU-1) is located in the eastern part of downtown New Haven. The site is underlain by the Missouri River alluvial aquifer (about 30 feet thick at the site). The principle feature of the site is a one-story industrial building (Riverfront building). Ground-water is being investigated at the site and beneath adjacent private and city owned land. The ground-water monitoring network at OU-1 includes 7 alluvial monitoring wells (TW prefix) and 4 bedrock monitoring wells (BW prefix).

The Remedial Investigation of OU1 was completed by the USEPA in 2003. Significant soil and ground-water contamination was detected at the site. The largest concentrations of PCE and its degradation products in ground-water at OU-1 have been detected in monitoring well TW-G near the boat ramp. An extensive network of soil sampling (144 locations) was done at the site (including inside the building) to determine the extent and magnitude of soil contamination at the site. Results of ground-water monitoring (28 locations) indicate that a plume of ground-water contamination extends from Front Street northeast to boat ramp at the Missouri River.

Interviews conducted by the Missouri Department of Natural Resources (MDNR) and the U.S. EPA indicate that industrial activities that occurred at the Riverfront site include metal fabrication, furniture assembly and painting, metal tempering, and automotive repair. During the 1950s, 1960s, and early 1970s, PCE was known to have been used at the facility and PCE containing waste were reportedly dumped on the land surface near the building. Given the types of industrial uses at the facility, the types of waste expected include scrap metal and metal shavings (aluminum and steel), chlorinated solvents (used to degrease metals), paints and paint solvents, and hydrocarbons (fuels and oils).

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