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6.0 ANALYTICAL RESULTS Page 7 Soil samples were analyzed at Chromalab, Inc., for total petroleum hydrocarbons as gasoline (TPH-g) by modified EPA Method 8015 and benzene, toluene,ethylbenzene and xylenes (BTEX) by EPA Method 8020. Soil samples collected near the waste oil tank in boring B-7 were analyzed for Total Oil and Grease (TOG) by Standard Method 5520 E and F. Groundwater samples from all borings and wells were analyzed at Chromalab, Inc., for total petroleum hydrocarbons as gasoline (TPH-g) by modified EPA Method 8015 and benze.ne, toluene, ethylbenzene and xylenes(BTEX) by EPA Method 602. A groundwater hydropunch sample from boring B-7 near the waste oil tank was analyzed for Total Oil and Grease(TOG) by Standard Method 5520 B and F. The analytical results for the soil and groundwater samples are presented in Tables I rind 2, respectively. The laboratory reports with laboratory quality assurance/quality control documents for soil and groundwater samples are included as Appendices E. Chain-of-custody forms are included as Appendix F. ' 6.1 SOIL SAMPLES Hydrocarbons were not detected in soil samples collected from B-1 through B-3 and B-7. TPH-g were detected in soil samples collected from borings B-4 through B-6(Figures 3A and 3B). TPH-g were detected at 1,100 ppm in the soil sample from boring B-4 which was collected at 16 ft. below ground surface. This soil sample from B-4 also contained the maximum concentrations of BTEX. 6.2 GROUNDWATER SAMPLING Groundwater contamination was not detected in the hydropunch sample from boring B-7. TPH-g concentrations at 120,000 parts-per-billion(ppb)were highest in the hydropunch groundwater sample from soil boring B-4, located northeast and downgradient from the underground storage tank area (Figure 4). Concentrations of BTEX were also highest in hydropunch groundwater sample from boring B-4. No free product or sheen was observed in the teflon bailer or by using the electronic oil/water interface probe, although a petroleum odor was noted in the soils at about �.• 16 ft. and in the groundwater sample collected using the hydropunch in boring B-4.