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I <br /> • TU <br /> Alpha Analytical Laboratories Inc 0 860 Waugh Lane, H-1, Ukiah, California 95482 <br /> (707) 468 0401 <br /> February 4 , 1999 Page 1 <br /> I <br /> Robert Marty <br /> Advanced Geo Environmental <br /> 4005 N. Wilson Way <br /> Stockton, CA 95205 <br /> IQuality Control Report <br /> Batch Number: 99-0126-015 <br /> Method Matrix Duplicate <br /> Blank Spike Spike <br /> Recovery Recovery Recovery RPD <br /> a e a e <br /> s o a s <br /> Matrix- Soil <br /> OU-SMETALS-S Metals <br /> Cadmium ND 97 8 95 . 4 2 . 48 <br /> lie <br /> Chromium ND 96 4 93 . 9 2 . 63 <br /> Nickel ND 101 97 . 6 3 . 42 <br /> Lead ND 99 1 94 . 0 5 . 28 <br /> IZinc ND 106 105 . 948 <br /> OU-TPGBTXE-S TPH Gasoline W/BTXE <br /> Benzene ND 86 .4 86 0 464 <br /> Benzene ND 105 105 0 . 00 <br /> Ethylbenzene ND 102 92 4 9 . 88 <br /> Ethylbenzene ND 104 105 957 <br /> Toluene ND 103 86 8 17 . 1 <br /> Toluene ND 108 108 0 . 00 <br /> TPH -- Gasoline ND 87 . 1 90 6 3 . 94 <br /> I Xylenes ND 1.1.0 102 7 . 55 <br /> Xylenes ND 11.3 113 0 00 <br /> VO--EPA8010-S Halogenated Volatile Organics <br /> Bromodichloromethane ND 109 119 8 77 <br /> Bromomethane ND 81 . 9 95 7 15 5 <br /> Bromoform ND 115 127 9 . 92 <br /> I Carbon Tetrachloride ND 118 123 4 15 <br /> 2-Chloroethylvinyl ether ND 65 6 72 . 2 9 . 58 <br /> Chlorobenzene ND 95 3 99 . 0 3 . 81 <br /> Chloroethane ND 92 2 94 3 2 . 25 <br /> (continued on next page) <br /> I <br />