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02 November 2007 <br />AGE-NC Project No.06-1481 <br />Page 3 of 4 <br />were labeled with soil boring designation, date, time, and samplers initials and then placed in a <br />chilled container. <br />Following soil and ground water sample collection, the probe-boring locations were backfilled to <br />surface grade with portland cement. Grouting of the borings was witnessed by representatives of the <br />EHD. <br />EQUIPMENT DECONTAMINATION <br />Geoprobe rods were thoroughly cleaned prior to soil probe boring advancement. Prior to sample <br />collection, Geoprobe soil sampling equipment was thoroughly rinsed with clean water after being <br />washed with a solution of Alconox. <br />SAMPLE ANALYSIS <br />Soil and ground water samples were transported under chain-of-custody to Cal Tech Environmental <br />Laboratories (CTEL), a California Department of Health Services-certified laboratory, and analyzed <br />for the following: <br />Total petroleum hydrocarbons quantified as gasoline (TPH-g), diesel (diesel), hydraulic oil <br />(TPH-ho) and motor oil (TPH-mo) in accordance with EPA Method 8015M; and <br />Volatile organic compounds, including benzene, toluene, ethylbenzene and xylenes (BTEX), <br />and methyl tertiary-butyl ether (MTBE) in accordance with EPA Method 8260. <br />FINDINGS <br />Utilizing the OVM, organic vapors were detected in soil samples B1-16, B1-20, B1-25, B1-30, <br />B1-35 and B1-40 at concentrations ranging between 1 parts per million volume (ppmv) and 407 ppm <br />in sample B1-15. Petroleum hydrocarbon-like odors were noted in these soil samples. <br />Four soil samples (B1-5, B1-15, B1-35 and B1-55) and one grab ground water sample (B1-W) were <br />submitted to CTEL for analysis for the chemicals of concern (COC) noted above. <br />TPH-g-range and TPH-d-range hydrocarbons were detected in soil sample B1-15 at concentrations <br />of 22 milligrams per kilogram (mg/kg) and 400 mg/kg, respectively, utilizing EPA Method 8015M. <br />Advanced GeoEnvironmental, Inc.