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1 ' TABLE 1 LABORATORY RESULTS SOIL Soil Analvses Constituent $ T E X TEPH ' Detection Limit 5.0µg/kg 5.0µg/kg 5.0 gg/kg 5.0 jg/kg 1.0-50 mg/kg Sample I.D. 1838-GPI-l1 ND ND ND ND 250 DSL ' 1838-GP2-10 ND ND ND ND ND 1838-GP3-10 ND ND ND ND ND ' 1838-GP4-10 ND ND ND ND 27 DSL 1838-GPS-10 ND ND ND ND ND ' 1838-GP6-10 ND 500* 910 1,600 8,900 17,000 DSL 1838-GP7-10 ND ND ND ND ND ' 1838-GP8-10 ND ND ND ND ND 1838-GP9-10 ND ND ND ND 64 MO 1838-GP10-10 ND ND ND ND ND 1838-GPI1-10 ND ND ND ND ND ' Denotes not detected at or above the concentration indicated. Laboratory detection limit raised due to elevated BTEX and TEPH concentration. Unit Conversions: Chemical Analvses: ' mg/kg:parts per million (ppm) B,T.E,X = benzene, toluene, ethyl benzene, and xylene µg/kg:parts per billion(ppb) TEPH =total extractable petroleum hydrocarbons, quantified as diesel, kerosene, and motor oil DSL =diesel MO =motor oil ND =none detected at or above detection limit ' 4.3 Results of Laboratory Analyses - Groundwater Laboratory analytical results indicated that BTEX constituents were not detected at or above ' the laboratory reported detection limits in groundwater samples collected from borings GP8, GP9, and GP 11. Results indicated that BTEX constituents were detected ranging from 0.4 to 87 µg/L in the groundwater samples collected from borings GPI, GP2, GP3, GP7, and GPIO. Results indicated that TEPH constituents were not detected at or above the laboratory reported detection limits in the ' groundwater samples collected from borings GP7 and GP 11. Diesel was detected at 2,100, 18, 13, 1.7, 0.70, and 5.5 mg/L in groundwater samples from borings GPI, GP2, GP3, GP8, GP9, and GP10, ' respectively. The laboratory results are presented in Table 2, below, and in Figure 6, Appendix A. Laboratory results and chain-of-custody forms are included in Appendix D. 1 1 ' �� CONDOR