Additional chemicals may be discovered and the concentrations of previously discovered chemicals may be higher. The pattern of fish and oyster contamination suggests that this site is not the source of PCBs in Biscayne Bay. The number of fish and oyster samples collected was too few, however, to characterize the extent of contamination throughout Biscayne Bay. After unusually heavy rains, the southeast lake on the landfill overflows and floods the Highland Village mobile home park. Until this stormwater is analyzed, we cannot determine its public health threat.
Nearby residents report that children swim in the on-site lakes.
Although coliform bacteria are not Superfund hazardous waste, children who swam in the on-site lakes 10 years ago may have been exposed to disease causing bacteria associated with fecal material. As a result of this exposure, these children were at a higher risk of infections such as hepatitis, meningitis, and gastroenteritis. It is not possible to determine the current health threat from swimming in these lakes because they have not been tested for bacterial contamination since 1982. If significant areas of the landfill adjacent to the Highland Village mobile home park are paved, landfill gases that currently migrate upward and dissipate may migrate latterly into Highland Village. Twenty-eight chemicals found in various media at this site lack sufficient toxicological data to determine their public health significance.