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Page 41 of 57 <br /> tiff eurofins I Quality Control - Spike/Spike Duplicate <br /> caiscience <br /> Date Received: 06114114 <br /> Conestoga-Rovers&Associates 14-06-1139 <br /> 19449 Riverside Drive, Suite 230 Work Order: <br /> Preparation: EPA 5030C <br /> Sonoma, CA 95476-6955 Method: EPA 82608 <br /> Project: Cordes Ranch, Hansen Road,Tracy, CA <br /> Page 4 of 5 <br /> rMW16-35 <br /> lity Control Sample ID Type Matrix Instrument Date Prepared Date Analyzed MS/MSD Batch Number <br /> 16-35 Sample Solid GUMS Q 06118114 0611811415:31 1406185011 <br /> Matrix Spike Solid GCIMS Q 06118114 0611811415:57 1406185011 <br /> 116.35 Matrix Spike Duplicate Solid GCIMS Q 06116114 0611811416:23 1406185011 <br /> Parameter Sample Spike MS MS M8D MSD °°Rec.CL RPD RPD CL Qualifiers <br /> Conc. Added Conc. oRec. Cone. °°Rec. <br /> Benzene ND 50.00 46.89 94 48.64 97 61-127 4 0-20 <br /> Ethylbenzene ND 50.00 48.90 98 51.12 102 57-129 4 0-22 <br /> Toluene ND 50.00 47.51 95 50.05 100 63-123 5 0-20 <br /> ND 100.0 101.1 101 106.5 107 70-130 5 0-30 <br /> p/m-Xylene <br /> o-Xylene ND 50.00 51.39 103 54.90 110 70-130 7 0-30 <br /> 0 <br /> U <br /> E <br /> tt <br /> RPD:Relative Percent Difference, CL:Control Limits <br /> 7440 Lincoln Way,Garden Grove,CA 92841-1427 TEL:(714)895-5494 FAX:(714)894-7501 <br />