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GeoAnalytical Laboratories, Inc. <br /> 1405 Kansas Avenue Phone (209) 572-0900 <br /> Modesto, CA 95351 FAX (209) 572-0916 <br /> QC REPORT <br /> Report# I275-16 Date: 10/14/97 <br /> Lab ID Dates Analyzed: 10/8/97 <br /> TREATEK Method: 8020,5030/LUFT <br /> 2701 E Hammer Ln <br /> Stockton CA 95210 <br /> Samples Analyzed: 121385-90 <br /> Sample Spiked: 121385 <br /> Analyte Matrix Spike Matrix Spike RPD Blank <br /> %Recovery Duplicate% <br /> Recovery <br /> Benzene 89.0 88.8 0.2 ND <br /> Toluene 104.8 93.3 11.6 ND <br /> Ethyl Benzene 88.0 88.2 0.2 ND <br /> Gasoline 83.9 83.5 0.4 ND <br /> Richard Meissner Donna Keller <br /> Chemist Certification # 1157 Laboratory Director <br />