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CALTECH ECH Environmental Laboratories <br /> k WIT ".1ij 1146 <br /> Ill <br /> QA/QC Report <br /> Method: 8260B <br /> Matrix: Water <br /> Date Analyzed: 3/13/07 <br /> Date Extracted: 3/13/07 <br /> Perimeters Conc. ug/L Spike Recover % Control Limits RPD <br /> MS MSD Added MS MSD Rec. RPD <br /> 1,1-Dichloroethene 48 46 50 96 92 70-130 20 4 <br /> Benzene 53 50 50 106 100 70-1367 20 6 <br /> Trichloroethene 58 56 50 116 112 70-130 20 4 <br /> Toluene 44 42 50 88 84 70-130 20 4 <br /> Chlorobenzene 49 45 50 98 90 70-130 20 8 <br /> Im,p-Xylenes 97 93 100 97 93 70-130 20 4 <br /> MS: Matrix Spike <br /> MSD: Matrix Spike Duplicate <br /> RPD: Relative Percent Difference of MS and MSD <br /> Perimeters Method Units Det. <br /> Blank Limit <br /> 1,1-Dichloroethene ND ug/L 1 <br /> Benzene ND u /L 0.5 <br /> Trichloroethene ND u /L 0.5 <br /> Toluene ND u /L 0.5 <br /> Chlorobenzene ND u /L0.5 <br /> m,p-Xyienes ND u /L 0.6 <br /> MTBE ND ug/L 1 <br /> TBA ND ug/L 10 <br /> DIPE ND u /L 1 <br /> ETBE ND u /L 1 <br /> TAME ND ug/L 1 <br /> 1,2-Dichloroethane ND u /L 0.5 <br /> EDB ND u /L 0.5 <br /> Ethylbenzene ND u /L 0.5 <br /> o-X lene ND u /L 0.6 <br /> TCE ND ug/L 1 <br /> PCE ND ug/L 1 <br /> I't)-I \I f Y I)I-NUN 11:1) 1O Cl IST()\41-R S�kI ISF,ACTION <br />