Assessment Comments
Assesment is based on results of U.S. EPA/IDNR fish tissue (RAFT) monitoring.
Basis for Assessment
SUMMARY: The general aquatic life uses were assessed as "partially supported." Fish consumption uses remain assessed as "not supporting." Other beneficial uses of this "general use" lake were not assessed. EXPLANATION: A fish kill occurred on Cedar Lake on April 24, 1997 (see assessment for the 1998 report). According to DNR's assessment methodology for Section 305(b) reporting, occurrence of a single pollution-caused fish kill within the most recent three-year period indicates that the aquatic life uses of a waterbody are only "partially supported." Thus, the assessment of support of the general aquatic life uses of Cedar Lake was changed from "not assessed" to "partially supported." Results of EPA/DNR fish tissue (RAFT) monitoring in 1998 showed that levels of technical chlordane in two composite samples of carp fillets (0.32 and 0.34 ppm) exceeded the FDA action level of 0.30 ppm. Thus, despite results of fish tissue monitoring in 1994 and 1996 that suggested lower levels of chlordane, monitoring in 1998 shows that chlordane levels continue to exceed the FDA action levels (although slightly) and that the fish consumption advisory issued for the lake in 1986 should remain in effect. Due to the existence of the fish consumption advisory, the fish consumption uses for this lake remain assessed as "not supporting." This lake will be again monitored as part of the EPA/DNR fish tissue monitoring program in 2000. Water quality data / information are not available for assessing support of other beneficial uses of this privately-owned lake.
