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Report Number 3010 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 12/10/2002 <br /> Project Name 2575 Country Club Blvd. <br /> Project Number 244-0783 <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 30108-03 <0 50 39 9 400 397 407 ug/L EPA 82608 1218102 99 5 102 219 70-130 25 <br /> Toluene 30108-03 <0 50 399 400 377 390 ug/L EPA 8260B 1218102 94 5 974 3 05 70-130 25 <br /> Tert-Butanol 30108-03 <5 0 200 200 192 193 ug/L EPA 8260B 1218102 961 966 0 514 70-130 25 <br /> Methyl-t-Butyl Ether 30108-03 <0 50 399 400 41 0 41 3 uglL EPA 8260B 1218102 103 103 0 534 70-130 25 <br /> i <br /> Benzene 30149.02 <0 50 400 400 395 387 ug/L EPA 8260B 1216102 98 8 968 212 70-130 25 <br /> Toluene 30149-02 <0 50 40 0 400 384 377 uglL EPA 8260B 1216102 961 942 208 70-130 25 <br /> Tert-Butanol 30149-02 4600 200 200 4700 4360 uglL EPA 82606 1216102 614 000 200 70-130 25 <br /> Methyl-t-Butyl Ether 30149-02 4300 400 400 4080 3990 uglL EPA 82606 1216102 000 000 000 70-130 25 <br /> Benzene 30071-01 <0 50 400 400 412 406 ug/L EPA 8260B 1216102 103 102 122 70-130 25 <br /> Toluene 30071-01 <0 50 400 400 39 3 386 ug1L EPA 8260B 1216102 98 2 964 185 70-130 25 <br /> Tert-Butanol 30071-01 <5 0 200 200 190 193 ug/L EPA 8260B 1216102 951 965 147 70-130 25 <br /> Methyl-t Butyl Ether 30071-01 <0 50 400 400 38 9 396 ug/L EPA 8260B 1216102 974 98 9 1 58 70-130 25 <br /> — �'� q <br /> Approved By J 11 Kiff <br /> KIFF ANALYTICAL, LLC <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />