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Page 31 of 48 <br /> titi e u rof ins Quality Control - Spike/Spike Duplicate <br /> Calscience <br /> Conestoga-Rovers &Associates Date Received: 05/30/15 <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 Batch Number <br /> 15.05-2041-5 Sample Solid ICP 7300 06101115 0610311515:46 150602SA3 <br /> 15-05-2041-5 Matrix Spike Solid ICP 7300 06101115 06/03115 15:53 150602SA3 <br /> 15-05-2041.5 Matrix Spike Duplicate Solid ICP 7300 06101115 06103115 15:54 150602SA3 <br /> Parameter Sample Spike MS MS MSD MSD %Rec.CL RPD RPD CL Qualifiers <br /> Cone. Added Conc %Rec. Conc. %Rec. <br /> Arsenic ND 5.000 5.322 106 3.713 74 80-140 36 0-11 3,4 <br /> is'U:. <br /> y,v; <br /> RPD:Reiative Percent Difference. CL:Control Limits <br /> 7440 Lincoln Way,Garden Grove,CA 92841-1427 • TEL:(714)895-5494 - FAX:(714)894-7501 <br />