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Report Number 48018 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 1/2612006 <br /> Project Name 7-Eleven Store#17334 <br /> Project Number 77EL.17334.05 <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 48019-02 <0 50 396 39 3 41 4 417 ug/L EPA 8260B 1124106 105 106 1 51 70-130 25 <br /> Toluene 48019-02 <0 50 396 39 3 38 6 38 6 ug/L EPA 8260B 1124106 974 98 3 0 865 70-130 25 <br /> Tert-Butanol 48019-02 <5 0 198 196 201 198 ug/L EPA 8260B 1124106 101 101 0 876 70-130 25 <br /> Methyl-t-Butyl Ether48019-02 <0 50 39 6 393 420 420 ug/L EPA 8260B 1124106 106 107 0 843 70-130 25 <br /> Benzene 47994-01 <0 50 396 392 457 460 ug/L EPA 8260B 1125106 115 117 1 53 70-130 25 <br /> Toluene 47994-01 <0 50 396 392 427 430 ug/L EPA 8260B 1125106 108 110 166 70-130 25 <br /> Tert-Butanol 47994-01 <5 0 198 196 205 202 ug/L EPA 8260B 1125106 104 103 0 678 70-130 25 <br /> Methyl-t-Butyl Ether47994-01 <0 50 396 392 382 381 ug/L EPA 82606 1125106 964 971 0 757 70-130 25 <br /> Benzene 48048-04 <0 50 400 400 41 1 405 ug/L EPA 8260B 1125106 103 101 1 36 70-130 25 <br /> Toluene 48048-04 <0 50 400 400 401 38 9 ug/L EPA 8260B 1125/06 100 973 3 04 70-130 25 <br /> Tert-Butanol 48048-04 <5 0 200 200 211 215 ug/L EPA 82606 1125106 105 107 1 96 70-130 25 <br /> Methyl-t-Butyl Ether 48048-04 <0 50 400 400 36 2 36 8 ug/L EPA 8260E 1125106 904 919 165 70-130 25 <br /> Benzene 48018-02 <0 50 400 400 39 7 387 ug/L EPA 8260B 1124106 993 968 247 70-130 25 <br /> Toluene 48018-02 <0 50 400 400 397 38 8 ug/L EPA 8260B 1124106 993 970 2 36 70-130 25 <br /> Tert-Butanol 48018-02 39 200 200 255 251 ug/L EPA 82606 1124106 108 106 1 91 70-130 25 <br /> Methyl-t-Butyl Ether48018-02 3 3 400 400 381 38 3 ug/L EPA 8260B 1124106 871 876 0 602 70-130 25 <br /> i <br /> t <br /> Approved By Joe iff <br /> KIFF ANALYTICAL, LLC <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />