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CALTECH Environmental Laboratories <br />' 6814 Rosecrans Avenue Pat amount CA 90723-3 146 <br /> O Telephone (562) 272-2700 Fax (562) 272-2789 <br /> QA/QC Report <br /> Method 8015M/8021 B <br />' Matrix Water <br />' Date Analyzed 11/23/04 <br /> Date Extracted 11/23/04 <br /> Perimeters Conc u /L Spike Recover % Control Limits RPD <br /> LCS LCSD Added LCS LCSD Rec RPD <br />' Benzene 43 42 50 86 84 70-130 20 2 <br /> Toluene 43 41 50 86 82 70-130 20 4 <br /> Eth benzene 44 42 50 88 84 70-130 20 4 <br />' <br /> Xylenes 99 92 100 99 92 70-130 20 1 7 <br /> TPH - Gasoline 1011 1 988 1000 101 99 1 70-130 1 20 1 3 <br />' LCS Laboratory Control Standard <br /> LCSD Laboratory Control Standard Duplicate <br />' RPD Relative Percent Difference of LCS and LCSD <br />' Method Blank <br />' Perimeters Method Units Det <br /> Blank Limit <br />' MTBE ND u /L 0 5 <br /> Benzene ND u /L 05 <br /> Toluene ND u /L 0 5 <br /> Eth benzene ND u /L 0 5 <br />' <br /> Xylenes ND ug/L 1 <br /> TPH - Gasoline ND u /L 50 <br /> I <br /> I <br /> TOTALLY DEDICATED TO CUSTOMER SATISFACTION <br />