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19 March 2001 <br /> • AGE-NC Project No 98-0492 <br /> Page 4 of 7 <br /> Each preserved sample was logged on a chain-of-custody form, placed in a chilled container and <br /> transported to McCampbell Analytical Inc (MAI), a State of California DHS-certified laboratory <br /> Samples P7-15 (boring P7, 15-foot depth), P7-20, P7-25, P8-15, P8-20, P9-15, P9-20, P10-15, <br /> ' P10-20, Pl 1-15 were analyzed for the following <br /> • TPH-g and TPH-d by EPA Method 8015Modified/5030/3550, - <br /> • BTEX and MTBE by EPA Method 8020, and <br /> • Tertiary butanol (TBA), di-isopropyl ether (DIPE), ethyl tert butyl ether (ETBE), tert amyl <br /> ' methyl ether (TAME), and MTBE by EPA Method 8260 Modified <br /> 3 12 Ground Water Sample Collection <br /> ' Grab ground water samples were collected from each probe boring using a temporary PVC screen <br /> The probe rods were advanced to a depth approximately four feet below the water table The hollow <br /> steel rods were then pulled out, 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 from each boring to fill three 40-m1 EPA-approved volatile <br /> organic analysis (VOA) vials containing 0 5 ml 18%hydrochloric acid as a sample preservative and <br /> ' one 1-liter amber bottle without the sample preservative Ground water sample containers were <br /> labeled with probe boring designation, date, time, and sampler's initials <br /> ' The preserved sample was logged on a chain-of custody form, placed in a chilled container and <br /> transported to MAI for analysis The ground water samples were analyzed for the following <br /> ' TPH-g and TPH-d by EPA Method 8015Modif-ied/5030/3550, <br /> • BTEX and MTBE by EPA Method 602, and <br /> ' TBA, DIPE, ETBE, TAME and MTBE by EPA Method 8260 Modified <br /> ' 3 1 3 Equipment Decontamination <br /> ' Prior to sample collection, Geoprobe soil and ground water sampling equipment was thoroughly <br /> rinsed with clean water after washing with a solution of Alconox Geoprobe rods were thoroughly <br /> ' cleaned prior to soil probe boring advancement <br /> ' Advanced GeoEnwonmental,Inc <br />