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Alpha Analytical Laboratories Inc. <br /> 860 Waugh Lane, H-1, Ukiah, California 95482 <br /> (707) 468-0401 <br /> October 3 , 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: 97-0926-023 <br /> Method Matrix Duplicate <br /> Blank Spike Spike <br /> Recovery Recovery Recovery RPD <br /> Matrix: Soil <br /> Chromium ND 104 104 0 . 00 <br /> Copper ND 112 107 4 . 57 <br /> Zinc ND 111 107 3 . 67 <br /> This Batch passes method quality control acceptance criteria. <br /> ND = none detected <br /> Bruce L. Gove <br /> Laboratory Director Date Printed: 10/03/97 <br />