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Page 28 of 48 <br /> eurofins Quality Control -Spike/Spike Duplicate <br /> Calscience <br /> EarthCon Consultants, Inc. Date Received: 10/02/15 <br /> 2124 Main Street, Suite 200 Work Order: 15-10-0164 <br /> Huntington Beach, CA 92648-2030 Preparation: N/A <br /> Method: EPA 200.7 <br /> Project: Cove Contractors/04.20090407.00 Page 3 of 5 <br /> Quality Control Sample ID Type Matrix Instrument Date Prepared Date Analyzed MS/MSD Batch Number <br /> OEM= <br /> Parameter Sample Soike MS MS MSD MSD %Rec.CL RPD RPD CL Qualifiers <br /> Conc. Added Cone. %Rec. Conc. %Rec. <br /> Calcium 71.46 0.5000 71.33 4X 71.16 4X 80-120 4X 0-20 Q <br /> Iron 0.3190 0.5000 0.8248 101 0.8230 101 80-120 0 0-20 <br /> Magnesium 28.47 0.5000 28.69 4X 28.34 4X 80-120 4X 0-20 Q <br /> Potassium 6.052 5.000 10.66 92 10.59 91 80-120 1 0-20 <br /> Sodium 73.24 5.000 77.05 4X 77.32 4X 80-120 4X 0-20 Q <br /> a <br /> 0 <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 />