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1 collected from boring DH-2 at a depth of approximately 90 feet <br /> 2 below grade. No contaminates (BTEX or TPHd) were detected in <br /> 3 this sample.: <br /> 4 6. Third Request For Groundwater gamplina Can May 22, <br /> 5 1991 SG&D resampled MW-1. The groundwater sample was collected <br /> 6 from at a depth of approximately 75 feet and contained only a <br /> 7 trace concentration (0.0006 ppm) of toluene. Such Level of <br /> 8 toluene is well below the action level for toluene (0.-1 ppm) and <br /> 9 has been found in many other cases to be naturally occurring at <br /> 10 such levels (or associated with adhesive tape used to seal sample <br /> 11 containers, or other lab contamination) . No other compound <br /> 12 (i.e. , the benzene, ethyl benzene, total xylenes, or TPHd) was <br /> 13 detected in the groundwater sample taken from MW-I (at the <br /> 14 laboratory detection limit for TPHd of 0.05 ppm and for all <br /> 15 others of 0.0005 ppm) . <br /> 16 7. Based on the forgoing data and our experience in these <br /> 1.7 types of cases, it is our opinion that: <br /> 18 a. There is no evidence that gasoline was ever <br /> 19 stored in the UST - - no TPH' as gasoline was detected in any soil <br /> 20 samples. <br /> 21 b. The lateral and vertical extent of petroleum- <br /> 22 affected soil in the vicinity of the UST has been adequately <br /> 23 assessed and the petroleum-affected soil in the vicinity of the <br /> 24 former UST was removed as required by the LUFT Guidelines. <br /> 25 C. The data indicates that the UST did not adversely <br /> 26 impact the groundwater at the site. The groundwater samples <br /> 27 taken in the immediate vicinity of the tank did not reveal any <br /> 28 contamination of concern and other groundwater samples reveal <br /> -5- VMMOLORSPNOHNSONMEC <br />