Summary of Polycyclic Aromatic Hydrocarbon Concentrations in Sediment Samples Figures 7-1.1, 7-2.1, and 7-3.1 show the maximum concentrations of total LMW and HMW PAHs (Priority+2 List and Long List; see Section 5) measured at each sediment location for the drainage ways, Dawson Cove, and Lake Conway, respectively. PAHs were detected in all site background sediment samples, and in all sediment sample locations in the drainage ways, Dawson Cove, and Lake Conway. PAH concentrations in sediment samples collected from the drainage ways, Dawson Cove, and Lake Conway are discussed in Sections 7.3.1, 7.3.2, and 7.3.3. Summary of Polycyclic Aromatic Hydrocarbon Concentrations in Drainage Ways The statistics for the individual and total PAHs are presented for the drainage ways in Table 7-5. None of the individual PAHs were above their respective ESVs. The FOD for the total LMW and HMW PAHs compared to their respective ESVs is summarized in the table below. Drainage Way Site Background Analyte N > ESV N > Site Bkg N > ESV Priority+2 List Total HMW PAHs 1 0 3 Total LMW PAHs 0 0 2 Long List Total HMW PAHs 2 0 3 Total LMW PAHs 3 2 2 Toxic Unit One-Carbon Model TU* 0 0 0 Notes: N > ESV = Number of samples (excludes duplicates) above the respective sediment ESVs Site background refers to background sediment locations in the drainage ways. * Summary for surface sediment samples only. The TU calculations for drainage way sediment samples are provided in Appendix J. In 33 of 35 samples in the drainage ways, the total HMW and LMW PAHs (both Priority+2 and Long Lists) are below the sediment ESVs. The TUs for the surface sediment samples were all 1.0 or less. In two samples (and one duplicate) in the drainage ways, PAH summations were detected above the ESVs; these samples are discussed below:
Summary of Polycyclic Aromatic Hydrocarbon Concentrations in Sediment Samples Figures 7-1.1, 7-2.1, and 7-3.1 show the maximum concentrations of total LMW and HMW PAHs (Priority+2 List and Long List; see Section 5) measured at each sediment location for the drainage ways, Dawson Cove, and Lake Conway, respectively. PAHs were detected in all site background sediment samples, and in all sediment sample locations in the drainage ways, Dawson Cove, and Lake Conway. PAH concentrations in sediment samples collected from the drainage ways, Dawson Cove, and Lake Conway are discussed in Sections 7.3.1, 7.3.2, and 7.3.3. Summary of Polycyclic Aromatic Hydrocarbon Concentrations in Drainage Ways The statistics for the individual and total PAHs are presented for the drainage ways in Table 7-5. None of the individual PAHs were above their respective ESVs. The FOD for the total LMW and HMW PAHs compared to their respective ESVs is summarized in the table below. Analyte Drainage Way Site Background N > ESV N > Site Bkg N > ESV Priority+2 List Total HMW PAHs 1 0 3 Total LMW PAHs 0 0 2 Long List Total HMW PAHs 2 0 3 Total LMW PAHs 3 2 2 Toxic Unit One-Carbon Model TU* 0 0 0 Notes: N > ESV = Number of samples (excludes duplicates) above the respective sediment ESVs Site background refers to background sediment locations in the drainage ways. * Summary for surface sediment samples only. The TU calculations for drainage way sediment samples are provided in Appendix J. In 33 of 35 samples in the drainage ways, the total HMW and LMW PAHs (both Priority+2 and Long Lists) are below the sediment ESVs. The TUs for the surface sediment samples were all 1.0 or less. In two samples (and one duplicate) in the drainage ways, PAH summations were detected above the ESVs; these samples are discussed below:
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