LDEQ sampled the surface impoundments and the sediments of Bayou Bonfouca in November and December 1992. EPA performed additional sampling as part of a site inspection in August 1993. The analytical results from the SI confirmed the presence of PAHs in the impoundments and in sediments from Bayou Bonfouca. Known sources of contamination are the North and South Impoundments and the overflow pond. The baffle system ponds may also be sources.
Surface water is the major pathway of concern.
Chemical analyses of a sediment sample in the bayou indicated the presence of numerous PAHs. Bayou Bonfouca is a fishery and is used for recreation. Additionally, an abundance of contiguous wetland areas and numerous sensitive environments lie along the banks of Bayou Bonfouca and downstream waterways. The description may change as additional information is gathered on the sources and extent of contamination.