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1 01 April 2004 <br /> i AGE-NC Project No 02-0950 <br />' Page 5 of 9 <br />' 31 STRATIGRAPHY <br /> Generally, gray, orange-brown to dark-brown, dry, silt with sand and gravel (fill material),was <br />' encountered from surface grade to approximately 6 feet bsg Light yellow-orange-brown to dark <br /> brown, damp to moist, clays, clayey silts and clayey sands were encountered from approximately <br /> 6 feet bsg to 21 feet bsg Brown,blue-gray to dark-gray, saturated, fine to coarse sand and silty sand <br /> was encountered from approximately 21 feet to 29 feet bsg, but to almost 35 feet bsg in the area of <br /> MW2 Gray to blue-gray,moist to saturated clay with medium to high toughness and plasticity was <br /> encountered from approximately 29 feet bsg to 36 feet bsg Blue-gray to green-gray, saturated, silt <br />' was encountered from approximately 36 feet bsg to 49 feet bsg in soil boring B4 Green-grey <br /> saturated, fine sand was encountered from approximately 49 feet bsg to the extent of the boring in <br /> soil boring B4 Lines of cross section are illustrated on Figure 2 and a stratigraphic cross sections <br /> Iare depicted on Figures 3 and 4 <br /> Hydrocarbons-like odor was detected in soil samples collected from 25 feet bsg in boring MW I, <br /> between 25 feet to 35 feet bsg in boring MW2,between 15 feet and 45 feet bsg in boring B4 and <br /> slight hydrocarbons-like odor detected in boring MW3 at 30 feet and 35 feet bsg In addition,organic <br /> vapor was detected by the OVM in soil samples collected from all four borings at concentrations as <br /> high as 52 parts per million(ppm)in sample B4-40 Organic vapor field measurements are included <br /> on the boring logs in Appendix B <br /> I <br /> 32 ANALYTICAL RESULTS OF SOIL SAMPLES <br /> A total of 13 soil samples were analyzed for TPH-g, TPH-d, BTEX, five fuel additives, lead <br /> scavengers and total lead <br /> ITPH-g was detected in soil samples collected from borings B4 and MW2 at concentrations of <br /> 12 milligrams per kilogram (mg/kg) (B4-25) and 1 8 mg/kg (MW2-35) <br /> IBenzene, toluene, ethylbenzene and total xylenes were detected in soil samples collected from <br /> borings B4 and MW2 at maximum concentrations of 0 044 mg/kg (MW2-35), 0 27 mg/kg <br /> (MW2-35), 0 15 mg/kg (B4-25) and 0 35 mg/kg (MW2-35), respectively <br /> Total lead was detected in all samples analyzed from borings MWIthrough MW3 at concentrations <br /> ranging from 6 3 mg/kg (MW2-35) to 15 mg/kg (MW1-35), total lead was not detected above the <br /> laboratory detection level or 5 0 mg/kg in the samples analyzed from B4 <br /> No additional analytes were detected at or above laboratory detection limits in the samples analyzed <br /> • Analytical results of soil samples are summarized on Table 1 The laboratory reports(CTEL Project <br /> IAdvanced GeoEnvironmental,Inc <br /> I <br />