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Page 17 of 32 <br /> C;aiscience <br /> AKnvironmental Quality Control -Spike/Spike Duplicate <br /> L aboratories, Inc. <br /> ERM Date Received: 04/16/14 <br /> 1277 Treat Blvd Suite 500 Work Order: 14-04-1157 <br /> Walnut Creek, CA 94597-7989 Preparation: EPA 7471A Total <br /> Method: EPA 7471A <br /> Project: PG&E MDI /0242722 Page 4 of 5 <br /> Quality Control Sample ID Type Matrix Instrument Date Prepared Date Analyzed MS/MSD Batch Number <br /> 14-04-0762-13 Sample Solid Mercury 05 04/16/14 04/1611411:45 140416SO4 <br /> 14-04-0762-13 Matrix Spike Solid Mercury 05 04/16/14 04/16/14 11:51 140416504 <br /> 14-04-0762-13 Matrix Spike Duplicate Solid Mercury 05 04/16/14 04/16/14 11:54 140416504 <br /> Parameter Sample Spike MS MS MSD MSD %Rec.CL RPD RPD CL Qualifiers <br /> Conc. Added Conc. %Rec. Conc. %Rec. <br /> Mercury ND 0.8350 0.7734 93 0.8081 97 71-137 4 0-14 <br /> N <br /> C <br /> m <br /> C <br /> O <br /> U <br /> 0 <br /> E <br /> m <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 />