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Site Background Information: Fast& Easy Mart <br /> Page 3 of 3 <br /> PREVIOUS SITE ASSESSMENT <br /> On 31 July 2002,three soil probe borings(B3,B4,and B5)were advanced east and northwest of the <br /> former UST excavation,and north of the former dispenser area.Discrete soil samples were collected <br /> at 5-foot intervals,beginning at 10 feet bsg, to the total depth of the borings (between 35 feet and <br /> 40 feet bsg).In addition,a grab ground water sample was collected from each boring at total depth. <br /> ' TPH-g and BTEX compounds were not detected in any of the soil samples collected. MTBE was <br /> detected by EPA Method 8260 in three soil samples at concentrations of 0.016 mg/kg (B3-30), <br /> 0.008 mg/kg(B4-20),and 0.006 mg/kg(B4-30).Analytical results of soil samples are summarized <br /> ' in Table I of this appendix. <br /> TPH-g was detected in the grab ground water samples from borings B3,B4,and B5 at concentrations <br /> ' of 240 µg/l, 300 pg/l, and 180 gg/l,respectively.BTEX compounds were not detected,but MTBE <br /> and 1,2-DCA were detected by EPA Method 8260 in each of the ground water samples at maximum <br /> concentrations of 200 µg/l (B4)and 13 µg/l(B5).Aanalytical results of grab ground water samples <br /> are summarized in Table 1 of this appendix. <br /> lie SITE HYDROGEOLOGIC CONDITIONS <br /> Based upon ground water monitoring well information obtained during quarterly monitoring events <br /> at the site, ground water flow direction is typically toward the southwest and occurs at a depth of <br /> approximately Theet bsg.Ground water is located in a generally sandy layer of soil extending from <br /> approximately 35 feet to 45 feet bsg. Sedimentary units are believed to be relatively horizontal and <br /> continuous over the area. <br /> v�f`o �� <br /> � 1 <br /> Advanced GeoEnvtronmental,Inc. <br /> f' <br />