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{ TM <br /> Alpha Analytical Laboratories Inc. 860 Waugh Lane, H-1, Ukiah, California 95482 <br /> (707) 468.0401 <br /> April 1, 1999 Page 1 <br /> 1 <br /> Advanced Geo Environmental. <br /> 4005 N. Wilson Way <br /> f Stockton, CA 95205 <br /> Quality Control Report <br /> Batch Number: 99-0323-008 <br /> Method Matrix Duplicate <br /> Blank Spike Spike <br /> Recovery Recovery Recovery RPD <br /> Matrix: Soil <br /> OU-BTXE-S Benzene,Toluene,Xylene 7 <br /> Benzene ND 83 . 3 79 .7 4 . 42 <br /> Benzene ND 1+10 111 . 905 <br /> Ethylbenzene ND 92 . 2 88 . 0 4 . 66 <br /> Ethylbenzene ND 98 . 8 92 . 8 6. 26 <br /> Toluene ND 91. 0 85.8 5. 88 <br /> Toluene ND 99. 5 100 . 501 <br /> Xylenes ND 91. 3 87. 1 4 . 71 <br /> Xylenes ND 99 . 7 95. 3 4 .51 <br /> l TPH -- Diesel ND 11111 95. 5 15. 0 <br /> This Batch asses method' alit control accentance criteria. <br /> P quality <br /> ND = none detected <br /> Bruce L. Gove <br /> Laboratory Director Date Printed: 4/01/99 <br />