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✓24 <br /> QC Report : Matrix Spike/ Matrix Spike Duplicate Report Number .- 45-7 <br /> Date ; 09/10/2005 <br /> Project Name : Beacon <br /> Project Number : 3641 Stockton <br /> DuplicateDuplicate Spiked <br /> Spike Spiked Spiked Spiked Spiked Sample Relative <br /> Spiked Sample Spike Dup. Sample Sample Analysis Date Pe cent Pe cent Peercent Recov.avet Diff . t <br /> Parameter Sample Value Level Level Value Value Units Method Analyzed Recov, Recov. Diff. Limit Limit <br /> Benzene 45716-06 <0.50 40.0 40.0 40.6 40.2 ug/L EPA 8260B 913105 102 100 1.13 70-130 25 <br /> Toluene 45716-06 <0.50 40.0 40.0 37.7 37.4 ug/L EPA 82608 913105 94.3 93.5 0.923 70-130 25 <br /> Tert-Butanol 45716-06 <5.0 200 200 203 207 ug/L EPA 82606 913105 102 104 1.85 70-130 25 <br /> Methyl-t-Butyl Ether 45716-06 0.71 40.0 40.0 40.7 40.2 ug/L EPA 8260E 913105 100 98.8 1.21 70-130 25 <br /> Benzene 45700-17 <0.50 40.0 40.0 36.2 35.4 ug/L EPA 8260B 9/3/05 90.6 88.4 2.47 70-130 25 <br /> Toluene 45700-17 <0.50 40.0 40.0 35.2 34.4 ug/L EPA 82608 913105 88.1 86.0 2.48 70-130 25 <br /> Tert-Butanol 45700-17 <5.0 200 200 193 192 ug/L EPA 8260B 913105 96.7 96.0 0.794 70-130 25 <br /> Methyl-t-Butyl Ether.45700-17 <0.50 40.0 40.0 36.4 36.1 ug/L EPA 8260B 9/3105 91.1 90.2 0.966 70-130 25 <br /> Benzene 45697-02 <0.50 40.0 40.0 39.5 38.4 ug/L EPA 8260B 913105 98.8 96.1 2.78 70-130 25 <br /> Toluene 45697-02 <0.50 40,0 40.0 39.7 38.5 ug/L EPA 82608 913105 99.2 96.3 2.98 70-130 25 <br /> Tert-Butanol 45697-02 <5.0 200 200 198 190 ug/L EPA 8260B 913105 99.1 95.1 4.05 70-130 25 <br /> Methyl-t-Butyl Ether 45697-02 <0,50 40.0 40.0 38.8 38.5 ug/L EPA 8260B 913105 96.9 96.3 0.629 70-130 25 <br /> Benzene 45722-08 25 40.0 40.0 67.4 67.1 ug/L EPA 8260E 916105 106 105 0.694 70-130 25 <br /> Toluene 45722-08 1.6 40.0 40.0 41.5 41.7 ug/L EPA 82608 916105 99.8 100 0.568 70-130 25 <br /> Tert-Butanol 45722-08 <5.0 200 200 196 199 ug/L EPA 8260B 916/05 98.1 99.4 1.30 70-130 25 <br /> Methyl-t-Butyl Ether 45722-08 1.8 40.0 40.0 38.4 41.9 ug/L EPA 8260B 916105 91.6 100 9.14 70-130 25 <br /> KIFF ANALYTICAL, LLC Approved By: ,toe iff <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />