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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# K022-10 <br />Thorpe Oil <br />PO Box 357 <br />Lodi CA 95241-0357 <br />Samples Analyzed: K20293 -K20296 <br />Sample Spiked: K20295 -K20296 <br />Date: 2/5/99 <br />Dates Analyzed: 01/22/99-02/01/99 <br />Method: TTLC <br />Analyte <br />Matrix Spike <br />Matrix Spike <br />Relative Blank <br />% <br />Duplicate % <br />Percent <br />Difference (%) <br />Antimony <br />96.0 <br />104 <br />8.0 ND <br />Arsenic <br />98.0 <br />100 <br />2.0 ND <br />Barium <br />100 <br />99.0 <br />1.0 ND <br />Beryllium <br />85.0 <br />85.0 <br />0.0 ND <br />Cadmium <br />87.0 <br />87.0 <br />0.0 ND <br />Chromium <br />80.0 <br />87.0 <br />8.4 ND <br />Cobalt <br />88.0 <br />88.0 <br />0.0 ND <br />Copper <br />80.0 <br />80.0 <br />0.0 ND <br />Lead <br />104 <br />106 <br />1.9 ND <br />Mercury <br />104 <br />108 <br />3.8 ND <br />Molybdenum <br />86.0 <br />86.0 <br />0.0 ND <br />Nickel <br />90.0 <br />90.0 <br />0.0 ND <br />Selenium <br />110 <br />108 <br />1.8 ND <br />Silver <br />80.0 <br />80.0 <br />0.0 ND <br />Thallium <br />100 <br />98.8 <br />1.2 ND <br />Vanadium <br />100 <br />100 <br />0.0 ND <br />Zinc <br />80.0 <br />0.0 NDc <br />/N80.0 <br />,Gi� <br />"C �� �c�c `ti, L `L <br />Ramiro S.' ifaad <br />Donna Keller <br />Chemist <br />Certification # <br />1157 <br />Laboratory Director <br />