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'• 18 July 2002 AGE-NC Project No 96-0254 ' Page 5 of 17 ' • Only soil samples from PB-4 contained detectable concentrations of BTEX compounds ranging from 0 006 mg/kg to 0 099 mg/kg No other analytes were detected above laboratory reportingllmits Laboratory results ofsoil samples analyzed forpetroleum hydrocarbons area ' summarized in Table 2 • TPH-g, TPH-d and BTEX compounds were detected in all three ground water samples at concentrations as high as 100,000µg/I,36,000µg/1 and 11,000µg/1,respectively Laboratory results of grab ground water samples analyzed for petroleum hydrocarbons area summarized in Table 3 ' On 18 and 19 November 1999 two ground water monitoring wells(MW-4 and MW-7)were installed on-site A total of 4 soil samples were submitted for analysis ' TPH-g,TPH-d and BTEX compounds were detected in onlythe 5-foot soil sample collected from MW-4 at concentrations of 940 mg/kg,270 mg/kg,9 6 mg/kg,9 8 mg/kg,20 mg/kg and ' 48 mg/kg, respectively Laboratory results of soil samples analyzed for petroleum hydrocarbons area summarized in Table 2 '. On 13 March 2001, two soil borings (CPT-1 and CPT-2) were advanced on-site utilizing CPT technology to model the geological and hydrogeological framework and to assess the vertical extent of dissolved petroleum-hydrocarbons beneath the site A total of four"grab"groundwater samples ' were collected from CPT-1 and CPT-2 and submitted for laboratory analysis • TPH-g,TPH-d and BTEX compounds were detected only in the water sample collected from ' CPT-2 (61 to 65 feet bsg), at concentrations of 110µg/1 TPH-g, 85 µg/1 TPH-d, 2 4 µg/1 benzene, 3 3 µg/1 toluene, 1 3 µg/1 ethylbenzene and 5 9 µg/1 total xylenes Laboratory analysis of grab ground water samples collected from CPT-1 at depths of 26 feet to 30 feet, ' did not report any of the analytes at or above laboratory reporting limits Fuel oxygenated compound were not detected in the ground water samples Analytical results of the CPT "grab" ground water samples are summarized in Table 3 Analytical results of ground water samples are summarized in Table 4 A cross-section depicting the ' general hthology and the approximate distribution of contaminants in the soil beneath the site is illustrated on Figure 3 Maps depicting the approximate distribution of dissolved TPH-g, benzene and MTBE are illustrated on Figures 4, 5 and 6 IThe lateral and vertical extent of impacted soil and the lateral extent of impacted shallow ground water has been defined in all directions The vertical extent of deeper impacted ground water has ' been defined toward the north and is fairly well defined in the southern portion of the site I • Advanced GmEnvironmenal,Inc