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Report Number 269 <br /> QC Report . Matrix Spike/Matrix Spike Duplicate Date 6/10/2002 <br /> Project Name 440 W. Charter Way, <br /> Project Number 020531-BM1 <br /> Duplicate Spiked <br /> Duplicate Spiked Spiked Sample Relative <br /> Spike Spiked Spiked Sample Sample Relative Percent Percent <br /> Spiked <br /> 'ample Spike Du Sam le Sam le Analysis Date Percent Percent Percent Recov Diff <br /> Parameter Sample Value Level Level Value Value Units Method Analyzed Recov Recov Diff _ Limit Limit <br /> TPH as Diesel Blank <50 1000 1000 1080 1060 ug1L M EPA 8015 615102 108 106 156 70-130 25 <br /> Benzene 26649-41 <0 50 200 194 218 214 ug/L EPA 8260B 614!02 109 110 0 822 70-130 25 <br /> Toluene 26649-41 <0 50 200 194 225 220 ug/L EPA 8260B 614102 112 113 0 708 70-130 25 <br /> Tert-Butanol 26649-41 <5 0 100 972 101 978 ug/L EPA 8260B 614102 101 101 0 184 70-130 25 <br /> Methyl-t-Butyl Ether 26649-41 <0 50 200 194 220 21 2 ug/L EPA 8260B 614102 110 109 0 731 70-130 25 <br /> Benzene 26655-10 220 400 400 253 250 ug/L EPA 8260B 6/3102 951 856 106 70-130 25 <br /> Toluene 26655-10 21 400 400 392 385 ug/L EPA 82608 613102 928 91 0 201 70-130 25 <br /> Tert-Butanol 26655-10 12 200 200 211 204 ug/L EPA 8260B 613102 99 7 961 373 70-130 25 <br /> Methyl-t-Butyl Ether 26655-10 <0 50 400 400 375 368 ug/L EPA 8260B 613102 938 920 199 70-130 25 <br /> Benzene 26655-02 <0 50 400 400 41 6 412 ug/L EPA 82608 613102 104 103 0 965 70-130 25 <br /> Toluene 26655-02 <0 50 400 400 39 6 390 ug/L EPA 8260B 613102 990 975 148 70-130 25 <br /> Tert-Butanol 26655-02 <50 200 200 202 207 ug/L EPA 82608 613102 101 104 277 70-130 25 <br /> Methyl-t-Butyl Ether 26655-02 <0 50 400 400 412 407 ug/L EPA 8260B 613102 103 102 122 70-130 25 <br /> Approved By J I Kiff <br /> KIFF ANALYTICAL, LLC <br /> 720 Olive Dave, Suite D Davis, CA 95616 530-297-4800 <br />