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I Report Number 43974 <br /> QC Report Matrix Spike/ Matrix Spike Duplicate Date 6/1/2005 <br /> I <br /> I <br /> Project Name Former Beacon 12419 <br /> Protect Number 1419 48 <br /> Duplicate Spiked <br /> Duplicate Spiked Spiked Sample Relative <br /> Spike' Spiked Spiked Sample Sample Relative Percent Percent <br /> Spiked Sample Spike Dup t 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 43974-04 <0 50 400 40 0 Il 39 1 385 ug/L EPA 8260B 5127105 97 9 963 160 70-130 25 <br /> Toluene 43974-04 <0 50 400 400 38 3 377 ug/L EPA 8260B 5127105 957 942 158 70-130 25 <br /> Tert-Butanol 43974-04 <5 0 200 200 1, 1191 192 ug/L EPA 8260E 5/27105 956 958 0 215 70-130 25 <br /> Methyl-t-Butyl Ether 43974-04 1 7 400 400 r 41 1 41 3 ug/L EPA 8260B 5/27105 986 991 0 489 70-130 25 <br /> 11 ` <br /> Benzene 44003-02 <0 50 40 0 400 40 2 390 ug/L EPA 8260E 5128105 100 974 308 70-130 25 <br /> Toluene 44003-02 <0 50 400 400 110 0 387 ug/L EPA 8260B 5128105 100 968 326 70-130 25 <br /> Tert-Butanol 44003-02 <5 0 200 200 li X194 192 ug/L EPA 82606 5128105 96 9 958 117 70-130 25 <br /> Methyl-t-Butyl Ether 44003-02 <0 50 400 400 I{ 39 9 39 4 ug/L EPA 8260B 5128105 997 986 113 70-130 25 <br /> k <br /> 1 <br /> 73 �; <br /> 1 <br /> I <br /> I 1 I t <br /> 4 <br /> I <br /> I <br /> } � I <br /> t <br /> II It <br /> I <br /> i <br /> I , <br /> q I <br /> t <br /> I <br /> Approved By Joe off <br /> 1 1 KIFF ANA ICAL, LLC y, T, <br /> 2795 2nd St„Suite 300is, CA 95616 530-297-4800 <br />