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Page 31 of 48 <br /> tiff eu rDfi nS Quality Control - Spike/Spike Duplicate <br /> Calscience <br /> Conestoga-Rovers &Associates Date Received: 05130/15 <br /> 6520 Corporate Drive Work Order: 15-05-2299 <br /> Indianapolis, IN 46278-2915 Preparation: EPA 1311 <br /> Method: EPA 6010E <br /> Project: 085972-23A-5702 Page 6 of 8 <br /> Quality Control Sample ID Type Matrix Instrument Date Prepared Date Analyzed MSIMSD Balch Number <br /> 15-05.2041-5 Sample Solid ICP 7300 06101115 0610311515:46 150602SA3 <br /> 15.05-2041-5 Matrix Spike Solid ICP 7300 06/01/15 06/03/15 15:53 1506025A3 <br /> 15.05-2041-5 Matrix Spike Duplicate Solid ICP 7300 06141/15 0610311515:54 150602SA3 <br /> Parameter Samole Spike MS MS MS MSD %Rec.CL RPD RPD CL Qualifiers <br /> Conc. Added Canc. %Rec. Conc. %Rec. <br /> Arsenic ND 5.000 5.322 106 3.713 74 80-140 36 0-11 3.4 <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 />