Personnel from Carterville Fishery Resources Office (FRO) and COSO have completed the first year of sampling in an ongoing project to evaluate the effectiveness of PCB remediation at the Sangamo NPL site. Along with the physical and chemical analyses of fish conducted by COSO personnel, Carterville FRO will examine the population structure of upper trophic level fishes. The growth of fish collected from Sangamo Bay in Crab Orchard Lake will be compared with those collected from another, similar bay. In addition, fish community diversity, species richness, and species evenness will be compared between sites. Although additional data on upper trophic level fishes is needed, preliminary results show greater fish species richness, diversity, and evenness in Sangamo Bay, possibly indicating successful remediation efforts at this site.