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Page 31 of 48 <br /> ®ti e u rof ins Quality Control - PDS <br /> Calseience <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: EPA 3005A Filt. <br /> Method: EPA 6020 <br /> Project: Cove Contractors/04.20090407.00 Page 1 of 1 <br /> Quality Control Sample ID Type Matrix Instrument Date Prepared Date Analyzed PDS/PDSD Batch <br /> Number <br /> SON= mi iii EM <br /> Parameter Sample Conc. Spike Added PDS Cone. PDS%Rec. %Rec.CL Qualifiers <br /> Barium 0.1035 0.5000 0.6078 101 75-125 <br /> Manganese 0.03927 0.5000 0.5284 98 75-125 <br /> 0 <br /> U <br /> 0 <br /> c <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 />