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r <br /> Wrhl <br /> Alpha Analytical Laboratories Inc • 8b0 Waugh Lane, H 1, 8-040Ukiah, California 95482 <br /> (707) abs-oaoi <br /> ISeptember 21, 1998 Page 1 <br /> Advanced Geo Environmental <br /> 4005 N Wilson Way <br /> Stockton, CA 95205 <br /> IQuality Control Report <br /> Batch Number 98-0915-012 <br /> Method Matrix Duplicate <br /> Blank Spike Spike <br /> Recovery Recovery Recovery RPD <br /> Matrix Water <br /> Methyl Tertiary Butyl Ether ND 96 . 1 84 8 12 5 <br /> OU-TPGBTXE-W TPH Gasoline W/BTXE <br /> Benzene ND 96 2 84 8 12 . 6 <br /> Ethylbenzene ND 107 93 6 13 .4 <br /> Toluene ND 106 92 . 0 14 . 1 <br /> TPH - Gasoline ND 102 108 5 71 <br /> ITotal Xylenes ND 11.7 103 12 7 <br /> This Batch passes method quality control acceptance criteria. <br /> ND = none detected <br /> I <br /> I <br /> IBruce L Gove <br /> Laboratory Director Date Printed 9/21/98 <br /> I <br /> I <br /> I <br />