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Page 36 of 48 <br /> eurof ins Quality Control - LCS <br /> alscience <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 300.0 <br /> Project: Cove Contractors/04.20090407.00 Page 1 of 8 <br /> Quality Control Sample ID Type Matrix Instrument Date Prepared Date Analyzed LCS Batch Number <br /> OEM IN11111111111111111110M <br /> Parameter Soike Added Conc.Recovered LCS%Rec. %Rec.C Qualifiers <br /> Chloride 50.00 49.96 100 90-110 <br /> Nitrate(as N) 5.000 4.976 100 90-110 <br /> Sulfate 50.00 51.45 103 90-110 <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 />