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01 April 2004 <br /> •t AGE-NC Project No 02-0950 <br />' Page 8 of 9 <br /> • The vertical extent ofpetroleum-imp acted soil appears to be defined No target analytes were <br /> detected in soil samples collected from 35, 45 and 50 feet bsg in boring B4, although TPH-g <br /> and various BTEX compounds have been detected in boring MW2 and previous soil borings <br />' (B1, B2 and B3) to a depth of 35 feet bsg <br /> • No target analytes were detected in soil samples collected from borings MW 1 and MW3,but <br />' low concentrations of TPH-g and various BTEX compounds were detected in samples <br /> MW2-25 and MW2-35 Based on this investigation and previous site assessments,the lateral <br /> extent of soil contamination has been defined to the west and the northeast, and generally <br />' defined to the south, but has not been defined towards the southeast or northwest <br /> • Petroleum hydrocarbons were detected in groundwater sample B4-H20 collected from <br /> approximately 55 feet bsg at concentrations of 14,000µg/1 TPH-g, 11,000 µg/1 TPH-d, <br />' 11 µg/1 benzene, 260 µg/l toluene, 430 µg/l ethylbenzene, 2,650 µg/l total xylenes and <br /> 2 2 µg/l 1,2-DCA From this information the vertical extent of groundwater is not defined <br />' and presumably extends below 55 feet bsg <br /> • TPH-g and BTEX compounds were detected in the water sample collected from well MW-2 <br /> at a concentrations of 2,000 µgd TPH-g, 6 1 µg/1 benzene, 650 Pg/1 toluene, 550 µg/1 <br />'• ethylbenzene and 2,000 gg/l xylenes Ground water appears to be defined toward the west <br /> and northeast but not in any other direction <br /> I <br /> 5 0. RECOMMENDATIONS <br />' Based on the findings of the environmental activities recounted in this report, AGE recommends <br /> • Initiate a quarterly monitoring program, the next monitoring event should be performed in <br />' Apn12004 <br /> • Performance of a sensitive receptor survey at the site <br />' • Additional assessment to further define the vertical extent of groundwater contamination,and <br /> the lateral extent of ground water contamination towards the northwest, south and southeast <br /> of the former UST excavation <br /> 6.0. LIMITATIONS <br /> Our professional services were performed using that degree of care and shill ordinarily exercised by <br /> environmental consultants practicing in this or similar localities The findings were based upon <br /> • analytical results provided by an independent laboratory Evaluation of the geologic/hydrogeologic <br /> Advanced CeoEnvironmental,Inc <br /> I <br />