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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# J147-01 <br />Lab ID J20715-18,19,20,21,22,23,24 <br />Thorpe Oil <br />351 N Beckman <br />Lodi CA 95240 <br />Date: <br />Dates Analyzed: 5/27/98-5/30/98 <br />Method: 7420 <br />Samples Analyzed: J20715-18,J20719,J20720,J20721,J20722,J20723,J20724,J20725,J20726 <br />Sample Spiked: J70726 <br />Analyte <br />Lead <br />15 4=rot..�ZP;�5z <br />Chemist <br />Matrix Spike Matrix Spike Relative Blank <br />% Duplicate % Percent <br />Difference (%) <br />108 113 4.5 ND <br />Certification # 1157 <br />Donna Keller <br />Laboratory Director <br />