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CALTECH Environmental Laboratories <br /> • 6814 Rosecrans Avenue Paearnount CA 90723-3146 <br /> Telephone (562) 272-2700 fax (562) 272-2789 <br /> QA/QC Report <br /> Method 82608 <br /> Matrix Water <br /> Date Analyzed_ 12/20/04 <br /> Date Extracted 12/20/04 <br /> Perimeters Conc u L Spike Recovery % Control Limits RPD <br /> ICS LCSD Added LCS LCSD Rec RPD <br /> 1,1-Dichloroethene 44 43 50 88 86 70-130 20 2 <br /> Benzene 45 45 50 90 90 70-130 20 0 <br /> Trichloroethene 47 45 50 94 90 70-130 20 4 <br /> Toluene 45 43 50 90 86 70-130 20 4 <br /> Chlorobenzene 42 42 50 84 84 70-130 1 20 0 <br /> M,27—xylenes 1 88 85 100 88 85 1 70-130 1 20 3 <br /> LCS Laboratory Control Standard <br /> LCSD Laboratory Control Standard Duplicate <br /> RPD Relative Percent Difference of LCS and LCSD <br /> Perimeters Method I Units Det. <br /> Blank Limit <br /> 1,1-Dichloroethene ND u /L 1 <br /> Benzene ND a /L 0 5 <br /> Trichloroethene ND u /L 0 5 <br /> Toluene ND u /L 0 5 <br /> Chlorobenzene ND u /L 05 <br /> m,p-X lenes ND ug/L 06 <br /> MTBE ND u /L 1 <br /> TBA ND u /L 10 <br /> DIPE ND u /L 1 <br /> ETBE NO u /L 1 <br /> TAME ND u /L 1 <br /> 1,2-Dichloroethane ND u /L 05 <br /> EDB ND u /L 05 <br /> Eth (benzene ND __29/L 05 <br /> o-X lene NO I ug/L 06 <br /> TCE NDu /L 0 5 <br /> PCE ND u /L 0 5 <br /> TOTALLY DEDICA7 LD 10 CUSTOMER SATISFACTION <br />