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I r ' 31 October 2003 AGE-NC Project No 01-0839 ' Page 5 of 7 ' 75 feet bsg is described as a grayish brown silty sand (cemented), with a porosity of 40 6%, and an average permeability of 4 OX 104 cm/sec ' Organic vapor was detected in the soil samples collected at a maximum concentration of 31 parts per million (ppm) in soil sample MW2-35 Hydrocarbon-like odors were detected in several soil samples Organic vapor field measurements are included on the boring logs I ' 3 2 ANALYTICAL RESULTS OF SOIL SAMPLES A total of 26 soil samples were analyzed for the constituents listed in section 2 4 No target analytes ' were detected in soil samples collected from MW1 or in samples MW2-10, MW2-60, MW2-70, MW3-10, MW3-20, MW3-70, MW4-70, B5-10 (7/30/03) through B5-40 (7/30/03) I MTBE was detected in soil samples collected from,MW2-20 through MW2-50,MW3-30,MW3-40, MW4-30 and MW4-40 at concentrations ranging from 1 9 mg/l(MW2-30)to 0 050 mg/l(MW4-30) ' • TPH-g and BTE&X compounds were detected in soil samples collected from MW2-30 to MW2-50 at maximum concentrations of 13 mg/l (TPH-g, MW2-30) and 0 68 mg/l (xylenes, MW2-30) ' Analytical results of soil samples are summarized on Table 2 The laboratory reports (CTEL Lab Project No CT214-0308001 throughCT214-0308004),quality assurance/qualitycontrol(QA/QC) report and chain-of-custody forms are included in Appendix E 3 3 GROUND WATER GRADIENT AND FLOW DIRECTION ' At the time of the July 2003 sampling event,depths to ground water ranged from 70 72 feet to 70 94 ' feet below the tops of the well casings Ground water elevations at the site ranged 37 11 feet below mean sea level(MSL)to 37 10 feet above MSL(Table 1) During this monitoring event,the ground water levels in the wells were at least ten feet below the tops of the well screens, indicating that the Iwells are screened properly to yield representative shallow ground water samples The ground water elevations across the site differ less than 0 01 feet,indicating that the ground water table is essentially flat at this time Information from surrounding sites monitored by AGE indicates the ground water flow trends to the northwest Figure 3 illustrates the ground water elevations as measured on 04 August 2003 3 4 ANALYTICAL RESULTS OF GROUND WATER SAMPLES I Advanced GeoEnvironmental,Inc I