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I15 May 2004 • AGE-NC Project No 01-0815 Page 5 of 8 encountered from approximately 6 feet bsg to 16 feet bsg in borings MW 1,MW2 and B 1 and from ' approximately 6 feet to 26 feet bsg in MW3 Orange brown to blue grey hydrocarbon stained,moist, clay was encountered from approximately 16 feet to 31 feet bsg in MW 1, MW2 and B1 and from I 26 to 31 feet bsg in the area of MW3 Gray hydrocarbon stained, moist to'saturated silty sand was encountered from approximately 31 feet bsg to 45 feet bsg in borings MW2,MW3 and B1 and from 31 feet bsg to 36 feet bsg in boring MW1 Blue hydrocarbon stained, clay was encountered from approximately 36 feet bsg to 45 feet bsg in soil boring MW1 and from 46 feet bsg to 50 feet bsg in boring B1 Lines of cross section are illustrated on Figure 2 and a stratigraphic cross sections are depicted on Figures 3 and 4 ISelected soil samples were sent to Cooper Testing Laboratory(CTL) and analyzed for geotechnical properties The soil sample collected from MW 1 at 25 feet bsg is described as a grey sandy clay,with ' a porosity of 37 1%to 38 9%, an average permeability of 3 Ox 10-7 centimeters per second (cm/sec) and a-specificgravity of 2 75 cm/sec The hydraulic conductivity in sample MW 1-25 ranged from 3 5x 10 7 cm/sec to 2 6 x 10''cm/sec, which, according to Robertson and others (1990), is consistent ' with soil behavior associated with sands and silty sands The soil sample collected from MW2 at 30 feet bsg is described as a gray silty sand,with a porosity of 41 7%to 44 8%,an average permeability . of 3 Ox 10-' cm/sec and a specific gravity of 2 76 cm/sec The hydraulic conductivity in sample ' MW2 - 30 ranged from S 3x l O'cm/sec to 2 9x 10'cm/sec, which is consistent with soil behavior associated with silty sand to sandy silt The soil sample collected from MW2 at 40 feet bsg is described as a gray clay, with a porosity of 42 0% to 40 8%, an average permeability of 1 Ox 10 4 cm/sec and a specific gravity of 2 71 cm/sec The hydraulic conductivity in sample MW2-40 ranged from 9 8 x 10' cm/sec to 1 1 x 10-4 cm/sec, which is consistent with soil behavior associated with ' gravelly sand to dense sand CTL laboratory reports are included in Appendix E Hydrocarbon like odors were detected in soil samples collected from 20 feet bsg to total depth (45 ' feet bsg) in boring MW 1, between 25 feet and 45 feet bsg in boring MW2, between 25 feet and 45 feet bsg in boring MW3 and between 25 feet and 50 feet bsg in boring BI In addition,organic vapor was detected by the OVM in soil samples collected from all four borings at concentrations as high ' as 567 parts per million{ppm}in sample B1-35 Organic vapor field measurements are included on the boring logs in Appendix B ' F 32 ANALYTICAL RESULTS O SOIL SAMPLES ' A total of 16 soil samples were analyzed for TPH-g, BTEX and five fuel additives TPH-g was detected in soil samples collected from bonngs MW3 and B1 at maximum ' concentrations in each boring of 8 8 milligrams per kilogram (mg/kg) (MW3-30) and 49 mg/kg • {131-35}, respectively ' Advanced CeoEnvironmental,Inc