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lala- <br />Alpha Analytical Laboratories Inc <br />February 24, 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: 98-0217-005 <br />Page 1 <br />This Batch passes method quality control acceptance criteria. <br />ND = none detected <br />Bruce L. Gove <br />Laboratory Director <br />73' <br />Date Printed: 2/24/98 <br />Method <br />Matrix <br />Duplicate <br />Blank <br />Spike <br />Spike <br />Recovery <br />Recovery <br />Recovery <br />RPD <br />0 <br />0 <br />0 <br />0 <br />Matrix: Soil <br />Lead <br />ND <br />96.6 <br />95.4 <br />1.25 <br />Methyl Tertiary Butyl Ether <br />ND <br />84.7 <br />83.5 <br />1.43 <br />OU-TPGBTXE-S TPH Gasoline <br />W/BTXE <br />Benzene <br />ND <br />92.4 <br />94.4 <br />2.14 <br />Benzene <br />ND <br />ill <br />109 <br />1.82 <br />Ethylbenzene <br />ND <br />94.2 <br />95.9 <br />1.79 <br />Ethylbenzene <br />ND <br />89.2 <br />93.2 <br />4.39 <br />Toluene <br />ND <br />88.7 <br />91.2 <br />2.78 <br />Toluene <br />ND <br />93.6 <br />96.0 <br />2.53 <br />TPH - Gasoline <br />ND <br />94.8 <br />89.7 <br />5.53 <br />Xylenes <br />ND <br />98.0 <br />99.9 <br />1.92 <br />Xylenes <br />ND <br />95.7 <br />99.7 <br />4.09 <br />This Batch passes method quality control acceptance criteria. <br />ND = none detected <br />Bruce L. Gove <br />Laboratory Director <br />73' <br />Date Printed: 2/24/98 <br />