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Page 48 of 56 <br /> alscience �o w U Roy <br /> _nvironmental Quality Control - LCS/LCS DuplicateQ° <' <br /> mw aboratories, Inc. <br /> neir - <br /> Parsons Date Received: N/A <br /> 2121 North California Blvd., Suite 500 Work Order No: 08-08-2353 <br /> Walnut Creek, CA 94596-7305 Preparation: EPA 7470A Total <br /> Method: EPA 7470A <br /> Project: Former Tracy MGP <br /> Date Date LCS/LCSD Batch <br /> Quality Control Sample ID Matrix Instrument Prepared Analyzed Number <br /> 099-04-008-3,641 Aqueous Mercury 08/27/08 08/27/08 0808271L04 <br /> Parameter LCS%REC LCSD%REC %REC CL RPD RPD CL Qualifiers <br /> Mercury 106 106 85-121 0 0-4 <br /> RPD-Relative Percent Difference, CL-Control Limit <br /> 7440 Lincoln Way, Garden Grove, CA 92841-1427 . TEL:(714) 895-5494 . FAX: (714) 894-7501 <br />