Bob White Lake IA 05-CHA-1338

Assessment Comments

Basis for Assessment

SUMMARY:  The Class A (primary contact recreation uses) were "not assessed."  Continued to assess support of the Class B(LW) aquatic life uses as "not supported."  Fish consumption uses were  "not assessed."  EXPLANATION:  The level of support of the Class A (primary contact recreation) uses was changed from "not supported" to "not assessed" due to the lack of information on levels of indicator bacteria at this lake.   This change in assessment reflects a change in the DNR's Section 305(b) assessment methodology and does not reflect any known change in water quality.   The previous (1998) assessment of support of the Class B(LW) uses ("not supported") was reviewed and approved by the DNR Fisheries Bureau in 2000.   The level of support of the fish consumption uses was changed from "fully supported" to "not assessed" due to the lack of recent fish contaminant monitoring at this lake.   The most recent fish contaminant monitoring was conducted as part of the 1991 EPA/DNR fish tissue (RAFT) monitoring program (see assessment developed for the 1994 report above).   The results of this monitoring are now considered too old (greater than five years) for characterizing current water quality conditions.