FIGURE 2.9. Hexachlorobenzene (HCB) and hexachlorobutadiene (HCBD) in English sole and rock sole liver. Values are mean concentrations ± SE. n = number of analyses. ppb = parts per billion. Site abbreviations: Colvos = Colvos Passage; 11th St = 11th Street Bridge; LTB = Lower Turning Basin; UTB = Upper Turning Basin. BDL = below detection limits. Some or all of the samples in this group had concentrations which were below detection limits. Detection limits vary depending on the sample size; detection limits for specific samples are listed in the Case Narratives. Samples with values below detection limits were treated as if the concentration was 50% of the detection limit.

^a p value is the comparison between Hylebos Waterway sites and the Colvos Passage reference site.
^b p value is the comparison of UTB or LTB with the 11th Street Bridge site.
^c p value is the comparison between the UTB and LTB sites.

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