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Advisory #1

(REVISED) October 29, 2004:

Site Name: New Haven (Franklin County). Also known as the Riverfront Superfund Site

Contaminants of concern: Tetrachloroethene (PCE) and its degradation products; Trichloroethene (TCE) and its degradation products. PCE and TCE are dissolved in groundwater and in some areas exist as free-product. New data shows that contamination is more severe than the previous advisory indicated.

Location: PCE and TCE contamination is present within the following areas, although the exact boundaries currently are not well-defined: Sec 36, Township 45, Range 3W; Sec 2, N ½ Sec 11, SW ¼ Sec 1 and NW ¼ Sec 12, Township 44, Range 3W.

Construction requirements: It is highly recommended that well installation contractors consult the division (573-368-2100) for construction specifications before considering drilling any type of well (domestic, multi-family, heat pump, etc.) in the advisory area. The division continues to collect information about the location and concentration of contaminants as site investigations continue. New information indicates that the problem is worse than previously understood; in fact, pools of contamination (free product) have been identified in the subsurface. In some areas, especially areas with pooled contamination, the division may advise that wells not be constructed in order to prevent the spread of contamination into deeper zones of the aquifer.

Caveat: Any well, including new wells constructed pursuant to this advisory, may be ordered to be plugged by the division if the well causes or permits a hazardous or potentially hazardous condition to exist which could cause deterioration of groundwater quality, per Section 256.637.4, RSMo. In addition, a release of a hazardous substance caused by the drilling of a well may make the contractor and/or well owner liable under the federal Superfund Law (CERCLA).

Contact: Bob Archer at 573-368-2165; Candice McGhee; MDNR Superfund, 573-751-1738




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