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QC Report. Matrix Spike/Matrix Spike Duplicate Report Number: 34739 Date . 09/08/2003 Project Name : Former Beacon 12474 Project Number: 1474.46 Duplicate Duplicate Spiked Spike Spiked Spiked Spiked Spiked Sample Relative Spiked Sample Spike Dup. Sample Sample Sample Sample Relative Percent Percent Parameter Sample Value Level Level Value Value Units Methods Analyzed Recov.PercentDate Recov. Percent Lieut v. Limit Benzene 34734-02 0.77 39.9 40.0 42.4 42.2 ug/L EPA 8260B 914103 104 103 0.719 70-130 25 Toluene 34734-02 <0.50 39.9 40.0 42.3 43.0 ug/L EPA 8260B 9/4103 106 107 1.29 70-130 25 Tert-Butanol 34734-02 640 200 200 872 832 ug/L EPA 82606 914103 117 97.1 18.8 70-130 25 Methyl-t-Butyl Ether 34734-02 1.7 39.9 40.0 41.0 40.0 ug/L EPA 8260B 9/4103 98.4 95.7 2.77 70-130 25 Benzene 34741-01 <0.50 40.0 40.0 38.6 38.2 ug/L EPA 8260B 9/2103 96.5 95.6 0.937 70-130 25 Toluene 34741-01 <0.50 40.0 40.0 42.5 41.9 ug/L EPA 8260B 912/03 Teri-Butanol 34741-01 <5.0 200 200 106 105 1.54 70-130 25 192 199 ug/L EPA 8260E 912103 96.1 99.6 3.55 70-130 25 Methyl-t-Butyl Ether 34741-01 <0.50 40.0 40.0 48.2 48.1 ug/L EPA 8260B 912103 121 120 0.270 70-130 25 Benzene 34739-01 <0.50 40.0 40.0 43.6 43.1 ug/L EPA 82606 912/03 109 108 1.08 70-130 25 Toluene 34739-01 <0.50 40.0 40.0 42.4 42.6 ug/L EPA 82606 9/2103 106 106 0.447 70-130 25 Tert-Butanol 34739-01 <5.0 200 200 206 213 ug/L EPA 8260B 912103 103 107 3.26 70-130 25 Methyl-t-Butyl Ether 34739-01 1.2 40.0 40.0 46.3 45.0 ug/L EPA 8260E 912/03 113 109 2.97 70-130 25 M i KIFF ANALYTICAL, LLC Approved By: JJ I 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 i.