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i <br /> i <br /> • la� <br /> AlphaAnalytical Laboratories Inc 860 Waugh Lane, H 1, Ukiah, California 95482 <br /> (707) 468 0401 <br /> March 25 , 1997 Page 1 <br /> Tim Cuellar <br /> Advanced Geo Environmental <br /> 1803 W March Ln, #A <br /> IStockton, CA 95207 <br /> I Quality Control Report <br /> Batch Number. 97-031.7-030 <br /> I Method Matrix Duplicate <br /> Blank Spike Spike <br /> Recovery Recovery Recovery RPD <br /> I a o 0 0 <br /> O O O P <br /> Matrix: Water <br /> Methyl Tertiary Butyl Ether ND 85 . 7 81 . 6 4 . 9 <br /> lie OU-TPGBTXE-W TPH Gasoline W/BTXE <br /> Benzene ND 71 . 4 68 . 4 4 29 <br /> Ethylbenzene ND 106 103 2 87 <br /> I Toluene ND 98 . 1 94 2 4 06 <br /> TPH - Gasoline ND 103 97 . 6 5 . 38 <br /> Total Xylenes ND 114 110 3 57 <br /> VO-EPA601-W Halogenated Volatile Organics <br /> Bromodichloromethane ND 92 1 96 . 8 4 . 98 <br /> Bromomethane ND 134 144 7 . 19 <br /> Bromoform ND 108 111 2 . 74 <br /> Carbon Tetrachloride ND 86 . 9 89 . 0 2 . 39 <br /> 2-Chloroethylvinyl ether ND 115 117 1 72 <br /> Chlorobenzene ND 95 . 4 102 6 69 <br /> Chloroethane ND 105 108 2 82 <br /> Chloroform ND 87 . 8 93 . 3 6 07 <br /> I Chloromethane ND 105 1.08 2 82 <br /> Chlorotoluene ND 96 . 5 101 4 . 56 <br /> Dibromochloromethane ND 100 108 7 . 69 <br /> 1, 1-Dichloroethylene ND 104 107 2 . 84 <br />' trans--1, 2-Dichloroethylene ND 76 . 5 80 . 8 5 47 <br /> cls-1, 2-Dichloroethylene ND 99 . 8 101 1 2 <br /> Dichlorodifluoromethane ND 100 102 1 . 98 <br /> I 1, 1-Dichloroethane ND 89 . 0 95 . 4 6 94 <br /> 1, 2-Dichloroethane ND 95 . 7 93 . 6 2 . 22 <br /> (continued on next page) <br />