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la 2W <br /> . Alpha Analytical Laboratories Inc 860 Waugh Lane, H 1, Ukiah, California 95482 <br /> (707) 468 0401 <br /> July 2 , 1997 Page 1 <br /> Kevin McKibben <br /> Advanced Geo Environmental <br /> 1803 W March Ln, #A <br /> Stockton, CA 95207 <br /> Quality control Report <br /> Batch Number: 97--0624-017 <br /> Method Matrix Duplicate <br /> Blank Spike Spike <br /> Recovery Recovery Recovery RPD <br /> 0 <br /> Matrix: Soil <br /> Methyl Tertiary Butyl Ether ND 116 117 • 85$ <br /> OU--TPGBTXE-S TPH Gasoline W/BTXE <br /> Benzene ND 95. 7 94 . 7 1 . 05 <br /> Benzene ND 61 . 3 62 . 9 2 . 58 <br /> Ethylbenzene ND 101 101 0 . 00 <br /> Ethylbenzene ND 81. 7 85 . 4 4 . 43 <br /> Toluene ND 99 . 7 98 . 6 1 . 11 <br /> Toluene ND 73 . 9 76 . 3 3 . 2 <br /> TPH - Gasoline ND 84 . 4 86 . 9 2 . 92 <br /> Xylenes ND 106 106 0. 00 <br /> Xylenes ND 84 . 4 87 . 3 3 . 38 <br /> This Batch passes method quality control acceptance criteria . <br /> ND = none detected <br /> Bruce L Gove <br /> Laboratory Director <br /> Date Printed 7/02/97 <br />