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' 1 <br /> GeoAnalytical Laboratories , Inc . <br /> 1405 Kansas Avenue Phone ( 209 ) 572 - 0900 <br /> Modesto , CA 95351 FAX (209 ) 572-0916 <br /> QC REPORT <br /> Report# J247-10 Date: 08/28/98 <br /> Lab ID Dates Analyzed: 9/9/98 <br /> Thorpe Oil Method: 8020 <br /> 351 N Beckman <br /> Lodi CA 95240 <br /> Samples Analyzed : J20572, J21573, J21580, J21581 <br /> Sample Spiked: J21573 <br /> Analyte Matrix Spike Matrix Spike Relative Blank <br /> Recovery Duplicate % Percent <br /> Recovery Difference (%) <br /> Benzene 90.7 95.2 4.8 ND <br /> Toluene 85 .9 90.7 5 .4 ND <br /> Ethyl Benzene 86. 1 93.3 SA ND <br /> Sylvia Krenn /Donna Keller <br /> Chemist Certification # 1157 Laboratory Director <br />