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28 July 2003 <br /> AGE-NC Project No 03-1038 <br /> Page 3 of 5 <br /> below the inferred water table (approximately 30 feet bsg) The hollow-steel rod assembly was <br /> pulled up approximately 4 feet, and a screened casing was inserted into the saturated zone Ground <br /> water was allowed to enter the casing, and samples were retrieved using a modified PVC tubing <br /> bailer Sufficient sample was collected to fill three 40-m1 EPA-approved volatile organic analysis <br /> VOA vials containing 0 5 ml 18% hydrochloric acid as a preservative The ground water sample <br /> containers were labeled with probe boring designation, date, time, and samplers initials and then <br /> placed in a chilled container Boring logs of all soil samples are included in Appendix B <br /> Following soil and ground water sample collection, all probe-boring locations were backfilled to <br /> surface grade with Portland cement <br /> EQUIPMENT DECONTAMINATION <br /> Prior to sample collection, Geoprobe soil sampling equipment was thoroughly rinsed with clean <br /> water after being washed with a solution of Alconox Geoprobe rods were thoroughly cleaned prior <br /> to soil probe boring advancement <br /> ANALYTICAL METHODS <br /> The collected soil and ground water samples were transported under chain-of-custody to Cal Tech <br /> Environmental Laboratories (CTEL), a California Department of Health Services-certified <br /> laboratory, for analysis for <br /> • Total petroleum hydrocarbons quantified as gasoline (TPH-g) and diesel (TPH-d) in <br /> accordance with EPA Method 8260B, and <br /> • Volatile organic compounds VOCs in accordance with EPA Method 8260B <br /> FINDINGS <br /> Organic vapors were not detected during boring advancement using a photo-ionization detector <br /> (PID) nor were any petroleum hydrocarbons-like odors noted in borings B-1, B-2 or B-4 through <br /> B-8 However,strong petroleum-hydrocarbon odors were noted in soil samples collected from boring <br /> B-3 Organic vapors were detected in samples collected from boring B-3 at concentrations up to 346 <br /> parts per million (ppm) <br /> A total of ten soil samples and seven grab ground water samples were submitted to CTEL for <br /> Advanced GeoEnvironmenuj,Inc <br />