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ry 30 August 2004 . AGE-NC Project No 99-0592 IPage 5of13 2 4 2 Preliminary Soil and Ground Water Assessment In June 1999, soil and ground water assessment activities were conducted at the site A total of five soil borings were completed,grab ground water and soil samples were collected for analysis,and one ' monitoring well (B1/MW-1) was installed,to 64 feet bsg (Figure 2) Soil boring logs are presented 5 in Appendix A y3a TPH-g was detected in soil sample B1-40' at a concentration of 1 6 mg/kg Additionally, BTEX/ o 0 � compounds were detected in sample B1-40 at concentrations as high as 0 20 mg/kg The fuel �1 ya I oxygenate MTBE was detected at concentrations of 3,400 micrograms per kilogram (ug/kg)and 67 ug/kg in samples B 1-30'and B2-30',respectively TPH-d and TPH-motor oil(mo)were not detected in the soil samples analyzed A total of three grab ground water samples were submitted for analysis TPH-g was detected in the ground water sample collected from boring B1, at a concentration of 2,400 micrograms per liter (ug/1) TPH-g was not detected in the grab ground water samples collected from borings B2 and B5 BTEX compounds were detected in grab ground water samples collected from B1 and B2 at concentrations as high as 170 ugll and 17 ug/l, respectively BTEX compounds were not detected in sample B5-W Analytical results of the soil and water samples collected during June 1999 are displayed in Tables 5 and 6 4Y tle During the period from ie 1999 through September 2000, four ground water sampling events of monitoring well MW-1 were conducted at the site During each quarter, laboratory analysis of the ground water sample collected from monitoring well MW-1 detected concentrations of TPH-g and MTBE Tertiary- butanol (TBA) and BTEX components were detected at relatively low concentrations for at least two of the four sampling events , ' 2 4 3 Site Characterization On 27 and 28 September 2001, three soil borings were advanced at the site Pilot borings MW-2, ' MW-3 and MW-4 were completed as ground water monitoring wells with a screen interval from 55 feet to 75 feet bsg Soil in the area of borings MW-2, MW-3 and MW-4 were not impacted by petroleum hydrocarbons or fuel oxygenating compounds Analytical results of the soil samples ' collected during September 2001 are displayed in Table 5 Ground water sampling has shown that none of the target analytes were detected in samples collected from MW-2, MW-3, MW-4 and domestic well DW-1 Analytical results of the ground water samples collected are displayed in ' Tables 1 and 2 GeoTracker confirmation pages of the submitted laboratory electronic deliverable format (EDF) files are included in Appendix B Soil boring logs with well construction details are included in Appendix A Figure 3 shows the lateral extent of soil and ground water contamination IFigures 4 through 9 show cross-sectional views and the extent of soil and ground water contamination along the lines of section A-A', B-B' and C-C', as shown in Figure 2 y Advanced GeoEnvironmental,Inc 1