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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# J352-05 Date: 12/29/98 <br /> Lab ID J22650 Dates Analyzed:. 12/28/98-12/29/98 <br /> Thorpe Oil Method: 8260 <br /> PO Box 357 <br /> Lodi CA 95241-0357 <br /> Samples Analyzed: J22650,J22651,J22652,J22653,J22654 - <br /> Sample Spiked: J22650 <br /> Analyte Matrix Spike Matrix Spike Relative Blank <br /> %Recovery Duplicate % Percent <br /> Recovery Difference(%) <br /> Methyl tert-Butyl Ether 93.6 98.2 4.8 ND <br /> Di-isopropyl Ether 100.8 105.8 4.9 ND <br /> Ethyl tertiary-Butyl Ether 100.7. 100.0 0.6 ND <br /> tertiary-Amyl Methyl Ether 96.8. .101.9 5.1 ND <br /> 4yvlviaKrenn Donna Keller <br /> Chemist- Certification # 1157 Laboratory Director. <br />