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ATTORNEY-CLIENT PRIVILEGE 3.3 ANALYsIs OF DATA An analysis of the sample results was done to determine if Site soil was the origin of the hydrocarbons detected in the groundwater at the Santa Fe Site To perform this analysts, chromatograms were obtained for soil samples as well as for the groundwater samples The chromatograms from the soil and groundwater were compared for characteristics such as (l) retention time (for compound identification), (2) number of peaks (indicative of number of chemicals present), (3) peak height (indicative of concentrations of each chemical), and ratios between peak heights (indicative of ratios of concentrations of chemicals) Three chromatograms from the background soil samples taken in January, 1991 were run by Sequoia Analytical It should be noted that no detectable levels of petroleum hydrocarbons were found upon analysis of the soil samples The chromatogram from the first soil sample, SFW-1-1 revealed the highest peaks at 11 05, 12 68, 13 12, 16 93, and 23 41 minutes (Figure 3-7) The chromatogram from the second soil sample, SFW-2-1 revealed the highest peaks at 11 05, 12 68, 16 93, and 23 41 minutes (Figure 3-8) The chromatogram for the third soil sample, SFW-3-1 revealed the highest peaks at 11 61, 12 68, 16 93, and 23 42 minutes (Figure 3-9) The chromatogram for the groundwater detect in SFW-1 revealed the highest peaks at 10 27, 11 05, and 11 61 minutes (Figure 3-10) The chromatogram for the groundwater detect in SFW-2 revealed the highest peaks at 10 26. 11 04, and 13 42 minutes (Figure 3-11) The chromatogram for the groundwater detect in SFW-3 revealed the highest peaks at 10 27, 11 06, and 12 68 minutes (Figure 3-12). In comparing the soil chromatograms with the groundwater chromatograms, it is apparent that there are similar constituents present in both background soil and groundwater It is therefore likely that the chemicals in the groundwater from this round of sampling originate from background levels of chemicals in the soil and not from petroleum hydrocarbons at the Site Another detect was found in the groundwater in the sampling round taken on May 19, 1993 Total extractable petroleum hydrocarbons were detected to SFW-3 at 64 lig/L (ppb) The chromatogram for this sample had the highest peaks at 9 50, 13 56, and 15 76 minutes (Figure 3-13) A standard using diesel was run in conjunction with the SFW-3 sample The standard chromatogram had several peals and the chromatogram did not appear to resemble that for the SFW-3 groundwater sample (Figure 3-14) Therefore, it is not likely that what was detected in the groundwater is diesel tuel An analytical chemist (Craig Lee) at Sequoia Analytical (the company responsible for generating the chromatograms from the groundwater and soil samples from the Site), stated in a conversation on April 11, 1994 that the chromatograms represented by Figures 3-7 through and including 3-13 do not resemble those obtained from fuel samples Rather, it is more likely that the peaks represent some organic material in the soil such as rotting leaves F G%MDF]MOVMCLOSURE%%1C%%M717 W_ 5 i