reported seeing leachate flowing into an unnamed creek along Andrew Avenue. Leachate is produced by rain percolating into the ground and coming into contact with contaminated waste buried in the landfill. Leachate overflow has been a problem at the site. In the late 1980s, leachate collected in the leachate system, overflowed a manhole on the Laurel Park site entering a stream that passes by several residences and a school playground. Tests of the leachate and the stream revealed the presence of hazardous substances, including benzene, toluene, and ethyl benzene. In the early 1970s, the CT Department of Public Health recommended steps to eliminate the migration of contaminants into surface waters. A sand filter was installed in response to CT Department of Public Health recommendations on the western edge of the site in the mid-1970s. In the early 1980s, monitoring of residential wells in the vicinity of Laurel Park found that some wells had contaminants believed to be site related. As a result, residences were provided with bottled water in 1983 by Laurel Park, Inc., and subsequently by the CT DEP until 1990 when the majority of the residences near the landfill were connected to the public water supply. In 1983 the CT DEP and Laurel Park Inc., entered into a stipulated judgement which required: the installation of monitoring wells the construction of a leachate collection system delivery of bottled water to affected homeowners. The judgement also allowed the landfill to be used for disposal of municipal waste only. In 1983, a leachate collection system was constructed to convey wastes off-site into the Naugatuck municipal waste water treatment plant. However, it was not hooked up until 1989. The CT DEP did not allow the collection system to flow into the municipal sewers until an additional separate leachate line was installed in December 1989. On October 13, 1983 the CT DEP issued a cease and desist order prohibiting the operation of the landfill based on the detection of 2,3,7,8-tetra-chloro-p-dioxin (TCDD) in an onsite monitoring well. Later sampling and analyses did not detect the presence of this contaminant. As a result the landfill was allowed to reopen and accept municipal waste. In 1986, a preliminary health assessment was performed by ATSDR which concluded that surface runoff and leachate associated with the site posed a potential public health threat to residents near the site. In May 1988 an Addendum to the Health Assessment was