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Report Number 29144 <br /> 11 <br /> QC Report. Matrix Spike/Matrix Spike Duplicate Date 10/17/02 <br /> Project Name 2575 Country Club, <br /> Project Number 021011-RM-1 <br /> Duplicate Spiked <br /> Duplicate Spiked Spiked II 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 Anal ed Recov Recov li Diff Limit Limit <br /> Benzene 29134-07 5 3 401 396 422 44 0 ug/L EPA 8260E 10/16/02 919 978 6 21 70-130 25 <br /> Toluene 29134-07 <0 50 401 396 367 378 ug/L EPA 8260B 10/16/02 915 956 430 70-130 25 <br /> Tert-Butanol 29134-07 <5 0 200 198 204 204 ug/L EPA 8260E 10/16/02 102 103 137 70-130 25 <br /> Methyl-t-Butyl Ether 29134-07 7 6 401 396 432 428 ug/L EPA 82608 10/16/02 889 890 0110 70-130 25 <br /> Benzene 29143-04 <0 50 400 400 396 389 ug/L EPA 82608 10/14/02 98 9 972 176 70-130 25 <br /> Toluene 29143-04 <0 50 400 400 38 6 38 2 ug/L EPA 82608 10/14/02 965 95 6 0 963 70-130 25 <br /> Tert-Butanol 29143-04 <5 0 200 200 210 199 ug/L EPA 82608 10/14/02 105 995 5 56 70-130 25 <br /> Methyl-t-Butyl Ether 29143-04 <0 50 400 400 336 337 ug/L EPA 82608 10/14/02 839 84 2 0 327 70-130 25 <br /> Benzene 2914415 <0 50 400 400 413 393 ug/L EPA 8260E 10/15/02 103 98 2 499 70-130 25 <br /> Toluene 29144-15 073 400 400 427 400 ug/L EPA 8260B 10/15/02 105 981 668 70-130 25 <br /> Tert-Butanol 29144-15 <5 0 200 200 218 200 ug/L EPA 8260B 10/15/02 109 100 872 70-130 25 <br /> Methyl-t-Butyl Ether 29144-15 <0 50 400 400 428 430 ug/L EPA 82608 10/15/02 107 108 0 466 70-130 25 <br /> Benzene 29143-01 <0 50 400 400 427 41 7 ug/L EPA 8260B 10/14/02 107 104 223 70-130 25 <br /> Toluene 29143-01 <0 50 400 400 423 419 ug/L EPA 8260B 10/14/02 106 105 0 950 70-130 25 <br /> Tert-Butanol 29143-01 <5 0 200 200 191 193 ug/L EPA 82608 10/14/02 956 96 5 0 973 70-130 25 <br /> Methyl-t-Butyl Ether 29143-01 <0 50 400 400 424 418 ug/L EPA 82608 10114/02 106 104 159 70-130 25 <br /> Approved By J I Kiff <br /> K1FF AN ICAL, LLCI <br /> 2795 2nd St,Suite 300is, CA 95616 530-297-4800 • <br /> II <br />