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Page 40 of 57 <br /> tiff eurofins I Calscience Quality Control - Spike/Spike Duplicate <br /> Conestoga-Rovers&Associates Date Received: <br /> 19449 Riverside Drive, Suite 23006/14/14 <br /> Work Order: <br /> Sonoma, CA 95476-6955 14-06-1139Preparation: <br /> EPA 5030C <br /> Project: Cordes Ranch, Hansen Road, Tracy, CA Method: EPA 82608 <br /> Page 3 of 5 <br /> Quality control Sample ID Type Matrix Instrument Date Prepared Date Analyzed MS/MSD Batch Number <br /> B117 5 Sample Solid <br /> GC/MS q 06/16/14 06/16/14 14:30 1406165013 <br /> 8117-5 Matrix Spike Solid GUMS Q 06/16/14 06/1611414:57 1406165013 <br /> 8117-5 Matrix Spike Duplicate Solid <br /> GUMS Q 06/16/14 06/16/14 15:23 1406165013 <br /> Parameter Sample Spike MS <br /> MS MSD MSD %Ree.CL RPD RPD Qualifiers <br /> Con,. Added Cana MIZ. MSD MLBenzene ND 50.00 37.61 75 <br /> Ethylbenzene 38.75 78 61-127 3 0-20 <br /> ND 50.00 34.22 68 34.93 70 <br /> Toluene 57-129 2 0-22 <br /> ND 50.00 37.00 74 37.85 76 <br /> p/m-Xylene 63-123 2 0-20 <br /> ND 100.0 70.45 70 71.55 72 <br /> o-Xylene 70-130 2 0-30 <br /> ND 50.00 35.96 72 36.63 73 <br /> 70-130 2 0-30 <br /> U <br /> E <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 />