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Page 40 of 48 <br /> e u rof i ns Quality Control - LCS <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 5 of 8 <br /> Quality Control Sample ID Type Matrix Instrument Date Prepared Date Analyzed LCS Batch Number <br /> Parameter Spike Added Conc.Recovered LCS%Rec. °/°Rec.CL Qualifiers <br /> Calcium 0.5000 0.4552 91 85-115 <br /> Iron 0.5000 0.4514 90 85-115 <br /> Magnesium 0.5000 0.4967 99 85-115 <br /> Potassium 5.000 4.931 99 85-115 <br /> Sodium 5.000 4.802 96 85-115 <br /> 0 <br /> U <br /> 0 <br /> c <br /> Cf <br /> K <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 />