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13EOMATRIX depth below which petroleum hydrocarbons were identified in adjacent borings (i.e., GMX-3, GMX-8,and MW-2). The chemical data from the Geomatrix soil samples were generally consistent with field obser- vations and are summarized in Table 3 and presented on Figure 4. TPHe was detected at 5100 ® mg/kg in the soil sample collected at 30 feet bgs from boring GMX-IB, and at 8000 mg/kg and 1200 mg/kg in soil samples collected at 5 feet and 55 feet bgs, respectively, from boring GMX-8. Benzene was detected at 0.067 mg/kg in GMX-8 in the sample collected at 55 feet bgs, and was not detected in any other soil samples. Toluene was detected above the laboratory reporting limits in all soil samples collected from GMX-8, GMX-9, and GMX-1B and ranged in concentration from 0.006 to 0.58 mg/kg. Ethylbenzene was detected in the samples r collected at 55 feet bgs from boring GMX-8 and at 30 feet bgs from GMX-1B at concentrations of 0.87 and 0.68 mg/kg, respectively. Xylenes were detected in samples collected from borings GMX-8, GMX-9, and GMX-1B at various depths at concentrations ranging from 0.006 mg/kg to 2.1 mg/kg. VOCs,' including TCE, were analyzed,but not detected, in samples collected at 5 and 10 feet bgs in samples from GMX-1 B. PAHs were detected in the sample collected at 55 feet bgs from boring GMX-8 at concentrations less than 0.2 mg/kg and in the sample collected at 30 feet bgs from boring GMX-1B at concentrations less than 0.7 mg/kg. PAHs were not detected in samples from GMX-9. 5.3 GROUNDWATER RESULTS Approximately 0.13 inches (slightly more than a sheen) of separate-phase petroleum hydrocar- bons were measured in MW-1. An immeasurable sheen was noted in MW-2. No separate- phase petroleum was detected in MW-3,MW-4, or WFSMW-I using the interface probe. Groundwater analytical results are summarized in Table 2 and shown on Figure 5. TPHg, TPHd,BTEX, and PAHs were detected in the sample from MW-2. In the groundwater sample collected from MW-2, TPHg, and TPHd were detected at 140 pg/l and 7,200 �ig/l (without a silica gel preparation procedure), respectively. Following the silica gel preparation procedure, TPHd was detected at 4,700 µg/l. This result indicates that the material quantified as"TPHd"without the silica gel preparation procedure may be partially polar components that may be due to intrinsic bioremediation of petroleum near this location. Low concentrations of BTEX and PAHs were detected in groundwater samples from MW-2 (i.e., at concentrations below maximum contaminant levels [MCLs],where applicable). 7 VOCs were analyzed S days past the 14 day hold time. 11oakI\deptdatalDoc_Safe16000s16447.00i1AeponIUS Can SoiIGW Rpt.doc 9