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1 <br /> Report Number 25039 <br /> QC Report Matrix Spike/ Matrix Spike Duplicate Date 3/13/2002 <br /> Project Name Haworth <br /> Project Number 3490 <br /> Duplicate Spiked <br /> Duplicat,- 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 24946-12 2 8 194 187 21 9 208 ug1L EPA 8260B 3/6/2002 986 967 1 99 70-130 25 <br /> Toluene 24946-12 1 3 194 187 206 19 4 ug/L EPA 8260E 3/6/2002 994 965 298 70-130 25 <br /> Tert-Butanol 24946-12 29 972 934 119 116 uglL EPA 8260B 3/612002 929 934 0 552 70-130 25 <br /> Methyl-t-Butyl Ether 24946-12 20 194 18 7 356 35 7 ug/L EPA 8260B 3/612002 798 837 4 78 70-130 25 <br /> Benzene 25050-02 <0 50 400 400 390 37 5 ug/L EPA 8260E 3/5/2002 974 937 384 70-130 25 <br /> Toluene 25050-02 <0 50 400 400 39 3 38 5 ug1L EPA 8260B 3/5/2002 98 2 962 2 08 70-130 25 <br /> Tert-Butanol 25050-02 <5 0 200 200 199 202 uglL EPA 8260B 315/2002 99 5 101 1 61 70-130 25 <br /> Methyl-1-Butyl Ether 25050-02 <0 50 40 0 400 358 366 ug/L EPA 8260B 31512002 896 91 6 2 18 70-130 25 <br /> Benzene 25090-05 <0 50 400 400 404 400 uglL EPA 8260B 318/2002 101 100 1 09 70-130 25 <br /> Toluene 25090-05 <0 50 400 400 430 42 3 uglL EPA 8260E 3/8/2002 107 106 1 50 70-130 25 <br /> Tert-Butanol 25090-05 <5 0 200 200 194 199 uglL EPA 8260B 3/8/2002 969 99 5 262 70-130 25 <br /> Methyl-t-Butyl Ether 25090-05 <0 50 400 400 34 7 349 uglL EPA 8260B 318/2002 867 873 0 718 70-130 25 <br /> r p fl <br /> Approved By Joel Kiff II <br /> KIFF ANALYI]CAL, LLC <br />