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' A S S O C I A T E S I N C 4.0 ANALYTICAL RESULTS ' 4L.1 Soil Analytical Results A total of sixteen soil samples collected from borings GPI through GP3, CPTI, and CPT2 were ' submitted to the laboratory for chenucal analyses The selected samples were collected at various depths ranging from 18 feet to 91 feet bgs Of these samples, only seven contained one or more analytes detected at concentrations above the laboratory's method detection limits (MDLs) TPHg was detected 1n the selected soil samples collected from borings GPI, GP2, and CPTI at concentrations ranging from 16 millgrams per kilogram (mg/Kg) to 290 mg/Kg Ethylbenzene was detected in the soil sample collected at a depth of 37 feet bgs from boring CPT] at a concentration of 0 31 mg/Kg Low levels of xylenes were detected in samples collected from borings GP 1, GP2, and CPTI at concentrations ranging from 0 065 mg/Kg to 3 6 mg/Kg Benzene, toluene, MTBE, and the remaining fuel oxygenates were not detected above their respective MDLs in any of the soil samples The lateral extent of petroleum hydrocarbons in soil 1s depicted on Figure 3 Analytical results of soil samples are summarized in Table 1 M4_2 Groundwater Analytical Results ' TPHg was detected in the groundwater samples collected from borings GPI, CPTI-W90, and CPTI-W123 at concentrations of 360 micrograms per liter (ug/L), 2,700 ug/L, and 270 ug/l, respectively Benzene was detected in the groundwater sample collected from boring CPTI-W90 at a concentration of 1 6 ug/L Toluene was detected in the groundwater samples collected from borings GPI, CPTI-W90, and CPTI-W123 at concentrations of 12 ug/L, 85 ug/L, and 8 6 ug/L, repectively The fuel oxygenate 1,2 DCA was detected in the groundwater samples collected from borings GPI and CPT 1-W90 at concentrations of 53 ug/L and 64 ug/L, respectively MTBE was not detected in any of the groundwater samples collected from the borings ' The groundwater samples collected from borings GP3, CPT2-W94, and CPT2-W l32 did not contain concentrations of TPHg, BTEX, or fuel oxygenates at or above laboratory MDLs A ' groundwater sample was not collected from the GP2 boring due to refusal at an approximate depth of 60 feet bgs Analytical results of groundwater samples are summarized in Table 2 Isocontcentrations maps showing the lateral extent of TPHg and 1,2-DCA in groundwater are ' depicted on Figures 6 and 7, respectively 5.0 SOIL DISPOSAL, Since drill cuttings for the Geoprobe® and CPT borings were limited to less than 30 gallons, they are currently being stored on site until they can be properly disposed of w\14885Veports\Sum2oa4 doe 6