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~~ 5.1 Surface Water Sample Locations .~ Comprehensive Analytical Results Report Fast and Wesi Willow Creek Sample locations are illustrated on Figures 1-3. Table 1 provides a summary of the samples collected and the analyses performed. A total of 38 aqueous (SW) and collocated sediment (SE) surface water samples were collected for this investigation corresponding to SW/SE01 through 40 (SW/SE 9 and 23 were not ollected). All aqueous samples were analyzed for total and dissolved metals and EPA Lab Groups B and ~i n C. All sediment samples were analyzed for total metals. Four pairs (SW and SE) of surface water samples were analyzed for organics and three pairs of surface water samples were analyzed for cyattide. Finally, _.~ ~=- four aqueous surface water opportunity samples were collected from the Solomon PMDTS and analyzed ~or total metals (one from each cell and one from East Willow Creek immediately adjacent to cell i/3). ~_'.-= a ~5.2 Surface Water Analytical Results Surface water analytical results are sor++rnarized in Tables 2 through 6. Dissolved (Table 2) and total (Table 3) metals results for aqueous surface water samples compare favorably, i.e. total concentrations generally exceed dissolved concentrations. Table 4 presents the total metals concentrations for sediment samples. Table 5 presents Lab Group B and C analytes and Table 6 presents sediment organic analytes. Elevated concentrations (as defined in section 3.0) are highlighted in the tables. In addition, Table 8 contains dissolved and total concentrations for cadmium, lead, and zinc as well as corresponding loading calculations for these analytes. A series of histograms (1 through 15) graphically presents dissolved and total concentrations, dissolved vs. total concentrations, and dissolved and total loadings calculations for cadmium, lead, and zinc. Elevated concentrations for aqueous samples ace no[ed for 10 analytes at one or more locations for dissolved metals and for 12 analytes at one or more locations for total metals. For total metals there are 98 ins[ances in which elevated analyte concentrations occur. As depicted in the table below, the major contaminants of concern are arsenic, cadmium, copper, iron, lead, manganese, and zinc. In the calculation of average concentrations, if the analyte was not detected a value equivalent to one-half the detection limit was used. 7