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1Aa <br />' Alpha OAnalytical Laboratories Inc 860 Waugh Lane, H 1, Ukiah, California 95482 <br /> (707) 468 0401 <br />' December 23 , 1997 Page 1 <br />' Tim Cuellar <br /> Advanced Geo Environmental <br /> 4005 N Wilson Way <br />' Stockton, CA 95205 <br />' Quality Control Report <br /> Batch Number 97-1216-016 <br />' Method Matrix Duplicate <br /> Blank Spike Spike <br /> Recovery Recovery Recovery RPD <br />' o o % o <br /> Matr3-x Water <br /> Methyl Tertiary Butyl Ether ND 90 0 85 2 5 48 <br /> • OU-TPGBTXE-W TPH Gasoline W/BTXE <br /> Benzene ND 98 0 91 6 6 75 <br /> Ethylbenzene ND 102 96 6 5 44 <br />' Toluene ND 101 95 0 6 12 <br /> TPH - Gasoline ND 77 0 72 . 0 6 71 <br /> Total Xylenes ND 101 95 7 5 39 <br /> This Batch passes method quality control acceptance criteria. <br /> ND = none detected <br /> I <br /> BruceL Gove �[,(/L� [�{� <br /> Laboratory Director Date Printed 12/23/97 <br /> I <br /> I <br />