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I <br />' 0 <br /> TM Alpha Analytical Laboratories Inc • 860 Waugh Lane, H-1, Ukiah, California 95482 <br /> (707) 468 0401 <br />' January 18, 1999 Page 1 <br /> Advanced Geo Environmental <br /> I 4005 N Wilson Way <br /> Stockton, CA 95205 <br />' Quality Control Report <br /> Batch Number 99-0112-010 <br /> Method Matrix Duplicate <br /> Blank Spike Spike <br />' Recovery Recovery Recovery RPD <br /> O O O <br /> a a o s <br /> Matrix- Water <br /> Methyl Tertiary Butyl Ether ND 94 4 98 0 3 74 <br /> OU-TPGBTXE-W TPH Gasoline W/BTXE <br /> Benzene ND 91 6 88 4 3 56 <br /> Ethylbenzene ND 87 .2 83 2 4 69 <br /> Toluene ND 94 8 91 2 3 87 <br /> TPH - Gasoline ND 90 3 95 . 5 5 6 <br /> Total Xylenes ND 96 7 91 3 5 . 74 <br /> This Batch passes method quality control acceptance criteria <br /> ND = none detected <br /> I <br /> Bruce L Gove <br /> Laboratory Director Date Printed 1/18/99 <br /> I <br />