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1101 <br /> Report Number 27081 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 07/02/2002 <br /> Project Name STOCKTON 3641 <br /> Project Number 3641 <br /> Duplicate Spiked <br /> Duplicate Spiked Spiked Sample Relative <br /> Spike Spiked Spiked Sample Sample Relative Percent Percent <br /> Spiked Sample Spike Dur) Sample Sample Analysis Date Percent Percent Percent Recov Diff <br /> Parameter Sample Value Level Level Value Value Units Method Analyzed Recov Recov Diff_ Limit Limit <br /> Benzene 26989-03 <0 50 198 200 191 194 ug/L EPA 82606 6/28102 963 970 0 776 70-130 25 <br /> Toluene 26989-03 <0 50 198 200 193 196 ug/L EPA 82608 6128102 976 982 0 562 70-130 25 <br /> Tert-Butanol 26989-03 <5 0 99 0 999 103 105 ug/L EPA 82606 6128102 104 105 0 210 70-130 25 <br /> Methyl-t-Butyl Ether 26989-03 66 198 200 836 854 ug/L EPA 82608 6128102 893 976 8 84 70-130 25 <br /> Benzene 27081-01 <0 50 400 400 458 448 ug/L EPA 82608 6/24102 114 112 232 70-130 25 <br /> Toluene 27081-01 <0 50 400 400 405 401 ug/L EPA 82608 6124102 101 100 0 943 70-130 25 <br /> Tert-Butanol 27081-01 <50 200 200 222 208 ug/L EPA 82606 6124102 111 104 614 70-130 25 <br /> Methyl-t-Butyl Ether 27081-01 410 400 400 485 497 ug/L EPA 82606 6124102 186 216 148 70-130 25 <br /> 1 <br /> Approved By Joel Kiff <br /> KIFF ANALYTICAL, LLC <br /> 720 Olive Drive, Suite D Davis, CA 95616 530-297-4800 �v <br />