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i <br /> Report Number 31087 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 11/30/03 <br /> Protect Name 2575 Country Club Blvd. <br /> Protect Number 245-0783 <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 Valuell Value Units Method Analyzed Recov Recov Diff Limit Limit <br /> Benzene 31069-01 <0 50 399 400 355 351 ug/L EPA 8260B 1125103 890 877 1X50 70-130 25 <br /> Toluene 31069-01 <0 50 399 400 371 362 ugA- EPA 8260E 1125103 92 9 906 2X51 70-130 25 <br /> Tert-Butanol 31069-01 <5 0 200 200 182 179 ugA- EPA 8260B 1125103 91 189 5 1 1182 70-130 25 <br /> Methyl-t-Butyl Ether 31069-01 <0 50 39 9 400 391 388 ug/L EPA 8260B 1125103 97 8 970 0 924 70-130 25 <br /> 11 1 <br /> Benzene 31064-05 <0 50 400 400 38 2 369 ug/L EPA 82606 1124103 95 5 922 3 52 70-130 25 <br /> Toluene 31064-05 <0 50 400 400 345 331 ug/L EPA 8260E 1124103 863 828 417 70-130 25 <br /> Tert-Butanol 31064-05 <50 200 200 192 194 ug/L EPA 8260B 1/24/03 961 969 0 818 70-130 25 <br /> Methyl-t-Butyl Ether 31064-05 <0 50 400 400 409 408 ug/L EPA 82606 1/24/03 102 102 0171 70-130 25 <br /> i <br /> W, <br /> Approved By J I Klff <br /> IKII=F ANALYTICAi., LLC <br /> is 2795 2nd St, Suite 30OWs, CA 95616 530-297-4800 <br />