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i IPetroleum hydrocarbons have been detected in each sample collected from the deep well • (MW-6) since it was installed In November 2001 The TPH-g-impact to the deeper ground ' water zone has not been defined toward the south, east and north Additionally, the concentration of TPH-g have increased vertical, at the former UST area, supporting a direct vertical migration route beneath the site (grab ground water samples CPT1-117 TPH-g at I140,000 µg11) • BTEX constituents were detected in water samples collected from wells in the former UST I excavation at the site at concentrations as high as 23,000 µg/1 (toluene) The benzene concentrations in the same well was as great as 11,000 µg11 The vertical extent of BTEX follows the phenomenon observed with gasoline, increasing with depth I0 1,2-DCA was detected in ground water samples collected from ten of the fifteen wells at the site at concentrations as high as 190µg/1(EX-1) Under the same analogy,the dissolved 1,2- DCA concentrations in ground water increase with depth of sampling The highest concentration of 1,2-DCA detected on the site was in the sample CPT-01-113-117 at 250µg/1 The detected concentrations of 1,2-DCA were above the MCL 1,2-DCA-impacted I shallow ground water has not been defined toward the east, and 1,2-DCA-impacted deeper ground water zone has not been defined toward the south, east and north • Additionally, EDB was detected in two samples from the site Soil sample MW-6 at 22 feet had an EDB detection of 460 µg/kg and dissolved EDB was detected at a concentration of 90 µg/l in CPT-01-113-117 I• I I I I Advanced GwEnvironmental,Inc I