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4 <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# J197-02 Date: 07/23/98 <br /> Lab ID Dates Analyzed: 07/16/98-07/22/98 <br /> Thorpe Oil Method: 7420 <br /> 351 N Beckman <br /> Lodi CA 95240 <br /> Samples Analyzed: J21044-J21055 <br /> Sample Spiked: J21048 <br /> Analyte Matrix Spike Matrix Spike Relative Blank <br /> % Duplicate % Percent <br /> ` Difference (%) <br /> Lead 92.0 100 8.3 ND <br /> i <br /> ' W4�ige"�.ro G�3a�lga� y`y1 , <br /> Donna eller <br /> Chemist Certification # 1157 Laboratory Director <br />