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Fig. 4. Lead in tree rings of 16 cores from baldcypress trees, 1893-1997, along Transect 1 running perpendicular to Bayou Trepagnier into the adjacent baldcypress-tupelo community; distance from the edge of the spoil bank on the east side of the bayou indicated by numerals under bars. Error bars indicate standard error. The level of Pb in trees along Stinking Bayou, the reference area, was significantly different from the levels in trees along the two transects (see Table 2). The detection limit is 1 mg/kg.
