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TM <br /> Alpha fAnalytical Laboratories Inc. 860 Waugh Lane, H-1, Ukiah, California 95482 <br /> (707) 468-0401 <br /> October 14, 1998 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: 98-0930-019 <br /> Method Matrix Duplicate <br /> Blank Spike Spike <br /> Recovery Recovery Recovery RPD <br /> 96 o o <br /> Matrix: Soil <br /> OU--TPDBTXE-S TPH Diesel W/BTXE <br /> Benzene ND 95 . 8 93 . 0 2 . 97 <br /> Benzene ND 93 . 6 85 .2 9 .4 <br /> Benzene ND 95 . 2 95 . 2 0 . 00 <br /> Ethylbenzene ND 94 . 5 91 . 2 3 . 55 <br /> Ethylbenzene ND 86 .4 79 . 6 8 . 19 <br /> Ethylbenzene ND 102 200 1 . 98 <br /> Toluene ND 94 . 5 91 . 3 3 .44 <br /> Toluene ND 92 . 8 84 . 8 9 . 01 <br /> Toluene ND 102 99 . 6 2 . 38 <br /> TPH - Diesel ND 109 93 . 5 15 . 3 <br /> Xylenes ND 101 97 . 5 3 . 53 <br /> Xylenes ND 97 . 3 90 . 7 7 . 02 <br /> Xylenes ND 104 100 3 . 92 <br /> This Batch passes method quality control acceptance criteria. <br /> ND = none detected <br /> Bruce L. Gove <br /> Laboratory Director bate Printed: 10/14/98 <br />