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Fig. 3. Levels of Pb in the top 10 cm of soil along Transect 1, eastward from Engineer's Canal (0 m), which is west of Bayou Trepagnier. Transect 1 begins at the base of the spoil bank along Bayou Trepagnier. Soil organic material was scraped from 21 randomly located sites along a line beginning west of Transect 1, starting at Engineers Canal west of Bayou Trepagnier and extending east into the swamp, and a 0.5-L sample of soil was collected at each site and analyzed. The detection limit is 1 mg/kg.
