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r �r �r r rr r �■s r� rr� � rr rc r r r er r � r <br /> Report Number 37962 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 4/26/2004 <br /> Project Name San Joaquin Catholic <br /> Project Number <br /> Duplicate Spiked <br /> Duplicate Spiked Spiked Sample Relative <br /> Spike Spiked Spiked Sample Sample Relative Percent Percent <br /> Spiked Sample Spike Dup 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 37947-03 <0 50 400 400 41 7 41 1 ug/L EPA 82606 4119104 104 103 1 52 70-130 25 <br /> Toluene 37947-03 <0 50 400 400 404 356 ug/L EPA 8260B 4119/04 101 891 124 70-130 25 <br /> Tert-Butanol 37947-03 8 3 200 200 209 216 ug/L EPA 8260B 4119104 100 104 315 70-130 25 <br /> Methyl-t-Butyl Ether 37941-03 <0 50 400 400 395 382 ug/L EPA 82608 4119104 988 955 335 70-130 25 <br /> I <br /> KIFF ANALYTICAL, LLC Approved By J f h <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />