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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# J142-04 Date: 05/28/98 <br /> Lab ID Dates Analyzed: 5/28/98 <br /> Thorpe Oil Method: 8240 <br /> 351 N Beckman <br /> Lodi CA 95240 <br /> Samples Analyzed: J20688,J20689,J20690 <br /> Sample Spiked: Method Spike <br /> Analyte Method Spike Method Spike Relative Blank <br /> % Recovery Duplicate% Percent <br /> Recovery Difference(%) <br /> 1,1-Dichloroethene 103.0 107.6 4.3 ND <br /> Trichloroethene 101.5 104.8 3.2 ND <br /> Chlorobenzene 100.0 103.6 3.6 ND <br /> Toluene 102.2 105.0 2.7 ND <br /> Benzene 103.2 107.4 4.0 ND <br /> Sylvia Krenn Donna Keller f <br /> Chemist Certification # 1157 Laboratory Director <br />