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4w_alscience <br />a. nvironmenta! <br />MW aboratodea, Inc. <br />Quality Control - Duplicate <br />Page 5 of 10 <br />Cardno ERI Date Received: 03/28/12 <br />601 North McDowell Blvd. Work Order No: 12-03-1849 <br />Petaluma, CA 94954-2312 Preparation: N/A <br />Method: EPA TO -3M <br />Project: ExxonMobil99CAS/022789C <br />Parameter Sample Conc Dt1P Conc RPD RPD CL Qualifiers <br />TPH as Gasoline 72.52 69.10 5 0-20 <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 />Date <br />Date <br />Duplicate Batch <br />Quality Control Sample ID <br />Matrix Instrument Prepared: <br />Analyzed: <br />Number <br />V-DSCHG <br />Air GC 13 NIA <br />03/28/12 <br />120328DOI <br />Parameter Sample Conc Dt1P Conc RPD RPD CL Qualifiers <br />TPH as Gasoline 72.52 69.10 5 0-20 <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 />