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' Site Background Information Five Star Manna <br /> . Page 3 of 3 <br /> On 01 and 05 December 1997, a total of eleven soil probe bonngs (P15 to P25) were established <br /> 1 surrounding the East UST area Locations of the soil probe borings are illustrated on Figure 2 <br /> TPH-g and BTEX constituents were detected in soil samples collected from the probe boring <br /> 1 advanced in the East UST area at concentrations as high as 2,100 mg/kg and 14 mg/kg (xylene), <br /> respectively Hydrocarbon-impacted soil associated with the East UST area appears to be limited to <br /> the former dispenser area(southern edge of Lindsay Street) to a depth of sixteen to seventeen feet <br /> below surface grade, in the saturated soil below ground water <br /> TPH-g was detected in six of eleven grab ground water samples collected from the East UST area <br /> 1 at concentrations ranging from 53 µg11 to 100,000 µg11 BTEX constituents were detected in eight <br /> of the ground water samples analyzed at concentrations ranging from 0 55 µg/1 to 1,700 µg11 <br /> 1 In January 1998, six ground water monitoring wells were installed on-site TPH-g and BTEX <br /> constituents were detected in soil samples collected from MW-1 and MW-5 at 15 feet bsg BTEX <br /> constituents were detected in the 20 foot sample from MW-1, maximum concentrations were <br /> 1 detected in sample MWI-15 at 3 9 gg/l TPH-g, 0 007 µg11 benzene, 0 019 µg11 toluene and <br /> 0 025 µg/1 xylenes <br /> GROUND WATER MONITORING <br /> 1 As of May 2004, TPH-g and BTEX constituents have been detected consistently in ground water <br /> samples from MW-1,but generally at decreasing concentrations TPH-d was detected when it was <br /> ' included in the analysis of the ground water samples MTBE has been detected twice,in March 2001 <br /> and June 2002, and TBA was detected in March 2000 No other target analytes have been detected <br /> since the initiation of monitoring <br /> ' TPH-d and MTBE were detected through March 2001 at low concentrations in ground water samples <br /> collected from well MW-2 These analytes have not been detected since the March 2001 sampling <br /> 1 event TPH-g and BTEX constituents were detected in August 1999 in MW-3, MW-4 and MW-5 <br /> MTBE and ETBE were detected through six sampling events from MW-4 Since June 2002,neither <br /> MTBE nor ETBE have been detected in MW-4 All samples from MW-6 have been non-detect,and <br /> 1 zgmnli-q have not hpPn r-n11PrtPr1 rPranthr frnm MW-fi <br /> 1 <br /> i1 <br /> i <br /> 1 <br /> 1 <br />