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• Petroleum 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 concentrations of TPH-g have Increased vertically, at the former UST area, supporting a direct vertical migration route beneath the site(grab groundwater samples CPT 1-117 TPH-g at 140,000 µg/1) • BTEX constituents were detected in water samples collected from wells in the former UST 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 • 1,2-DCA was detected in ground water samples collected from ten of the fifteen wells at the site at concentrations as high as 190 pg/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 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 • EDB was detected in two samples from the site Soil sample MW-6 at 22 feet had an EDB detection of 460 gg/kg and dissolved EDB was detected at a concentration of 90 µg/1 in CPT-01-113-117 Advanced GeoEnvi ron mental,Inc