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ARCADES GERAGHTY&MILLER xylenes MTBE was detected, using the EPA Method 8020, in samples from all depths where ' benzene was also detected As indicated in the workplan, sample splits were taken from samples with MTBE detections resulting from an EPA Method 8020 analysis and reanalyzed ' using EPA Method 8260 All soil samples from boring NP-1 reanalyzed using EPA Method 8260 were nondetect for MTBE and four other fuel oxygenates The results of MTBE ' confirmation analyses on samples collected from NP-1 are summarized in Table 5-2 ' Detailed mobile laboratory results, fixed-lab MTBE confirmation results, QA/QC records, and Cham-of-Custody records for the field soil sampling activities are included in ' Appendix F ' 5.3,2 Borinq NP,-22 TPHg, as analyzed by EPA Method 8015K were detected in soils sampled with the Simulprobe in boring NP-2 at depths o£60 and 65 ft bgs only TPHg concentrations detected ' at these depths were 10 mg/kg and 1 5 mg/kg, respectively TPHg was not detected, (detection concentration hmrt of 10 mg/kg), in the seven deepest successive underlying samples taken at discrete depths spaced between 70 and 122 ft bgs The results of TPHg analyses on soil samples collected from NP-2 are summarized in Table 5-3 and Figure 5-3 BTEX compounds, as analyzed by EPA Method 8020 were detected in soil samples ' collected at depths of 60, 65, and 70 bgs The highest benzene concentration was detected in ' the sample collected from the 60 foot depth interval(0 18 mg/kg) The benzene concentration in the sample collected from the 65 foot depth interval was only slightly less, at 0 17 mg/kg A ' similar distribution was observed for toluene, ethylbenzene, and total xylenes Concentrations of BTEX species in the 70 ft bgs depth interval decreased by nearly an order of magnitude ' below those in the 65 ft bgs depth interval, with the exception of total xylenes Concentrations of BTEX in samples collected from the 70 foot depth interval were 039 mg/kg for benzene, 027 mg/kg for toluene, 034 mg/kg for ethylbenzene, and 0 14 for xylenes 23