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TM <br />Alpha Analytical Laboratories Inc. <br />April 7, 1998 <br />Kevin McKibben <br />Advanced Geo Environmental <br />4005 N. Wilson Way <br />Stockton, CA 95205 <br />860 Waugh Lane, H-1, Ukiah, California 95482 <br />(707) 468-0401 <br />Quality Control Report <br />Batch Number: 98-0401-011 <br />Page 1 <br />This Batch passes method quality control acceptance criteria. <br />ND = none detected <br />Bruce L. Gove <br />Laboratory Director <br />Date Printed: 4/07/98 <br />Method <br />Matrix <br />Duplicate <br />Blank <br />Spike <br />Spike <br />Recovery <br />Recovery <br />Recovery <br />RPD <br />0 <br />o <br />a <br />o <br />Matrix: Soil <br />OU-TPGBTXE-S TPH <br />Gasoline W/BTXE <br />Benzene <br />ND <br />87.9 <br />101 <br />13.9 <br />Ethylbenzene <br />ND <br />96.4 <br />103 <br />6.62 <br />Toluene <br />ND <br />95.6 <br />103 <br />7.45 <br />TPH - Gasoline <br />ND <br />103 <br />96.1 <br />6.93 <br />Xylenes <br />ND <br />96.9 <br />103 <br />6.1 <br />This Batch passes method quality control acceptance criteria. <br />ND = none detected <br />Bruce L. Gove <br />Laboratory Director <br />Date Printed: 4/07/98 <br />