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Aerial images of Devil's Swamp Lake near Baton Rouge, Louisiana, showing (a) lake in relation to surrounding features and (b) approximate locations of sites sampled October 5, 2004.
Source publication
Devil's Swamp Lake near Baton Rouge, Louisiana, constructed by dredging in 1973 in Devil's Swamp along the Mississippi River, is contaminated with polychlorinated biphenyls (PCBs). This study investigated the possible historical contribution of PCBs from a hazardous-chemical disposal facility by way of a wastewater drainage ditch that operated from...
Contexts in source publication
Context 1
... Swamp Lake is located on the northwest side of Baton Rouge, La., in Devil's Swamp along the east bank of the Mississippi River ( fig. 1). The approximately 26-hectare lake was constructed by dredging in 1973, with the material removed used to reinforce the levee along the north and west side of the Baton Rouge Harbor (U.S. Environmental Protection Agency, 2004). During flood conditions, the lake and surrounding swamp are inundated by water from the Mississippi River. A ...
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... sediment cores were collected from four locations in Devil's Swamp Lake, and bottom-material samples were collected from three locations in the wastewater drainage ditch on October 5, 2004 ( fig. 1; table 1). All cores analyzed were collected using a push corer that is pushed into the bed sediment to obtain a core that is retained by a check valve. One gravity core also was collected; however, penetration and recovery were less than in a push core from the same site, so the gravity core was discarded. Cores DSL.1 and DSL.2 were collected ...
Context 3
... by a check valve. One gravity core also was collected; however, penetration and recovery were less than in a push core from the same site, so the gravity core was discarded. Cores DSL.1 and DSL.2 were collected near each other at a site in the upper (east) end of the lake, east of the low spit of land where the drainage ditch enters the lake (fig. 1b). This spit separates the upper end from the main body of the lake during low water. Cores DSL.3 and DSL.4 were collected near each other at the approximate center of the lake and about the same distance west of the spit as the site of DSL.1 and DSL.2 were to the east. Core DSL.5 was collected from a site about 350 meters (m) west of ...
Context 4
... to a non- detection at 0.05 mg/kg. Although these sites are much closer to the wastewater drainage ditch than DSL.5, maximum concen- trations were much lower than at DSL.5. PCBs were detected in the three bottom-material samples from the drainage ditch at about 1.8, 2.2, and 1.2 mg/kg for the three sites in the direction away from the lake ( fig. 1; table 2), concentrations higher than those at sites DSL.2 and DSL.4 near where the ditch enters the lake. PCBs were detected in core DSL.6 from near the north shore of the lake and at the mouth of a ditch entering the lake from the swamp at concentrations ranging from a nondetection to 0.96 ...
