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Alpha Analytical Laboratories Inc. <br />October 28, 1994 <br />Bob Marty <br />Geological Audit Services <br />1803 W March Ln, #A <br />Stockton, CA 95207 <br />860 Waugh Lane, H-1, Ukiah, California 95482 <br />(707) 468-0401 <br />Quality Control Report <br />Batch Number: 94-0919-004 <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: 10/28/94 <br />Method <br />Matrix <br />Duplicate <br />Blank <br />Spike <br />Spike <br />Recovery <br />Recovery <br />Recovery <br />RPD <br />o <br />Matrix: Soil <br />OU-TPDBTXE-S TPH Diesel <br />W/BTXE <br />Benzene <br />ND <br />98.7 <br />101 <br />2.3 <br />Ethylbenzene <br />ND <br />91.5 <br />95.6 <br />4.38 <br />Toluene <br />ND <br />110 <br />95.5 <br />14.1 <br />Xylenes <br />ND <br />92.8 <br />95.6 <br />2.97 <br />TPH - Diesel <br />ND <br />93.3 <br />89.0 <br />4.72 <br />This Batch passes method quality control acceptance criteria. <br />ND = none detected <br />Bruce L. Gove <br />Laboratory Director <br />Date Printed: 10/28/94 <br />