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alscience <br />�. n vironmental <br />abvratories, Inc. <br />Quality Control - Duplicate <br />Page 5 of 11 <br />c ,•► �cco,�a <br />•j <br />Cardno ERI Date Received: 05/16/12 <br />601 North McDowell Blvd. Work Order No: 12-05-1165 <br />Petaluma, CA 94954-2312 Preparation: N/A <br />Method: EPA TO -3M <br />Project: ExxonMobil99CAS/022789C <br />Date Date Duplicate Batch <br />Quality Control Sample ID Matrix Instrument Prepared: Analyzed: Number <br />V-1NF-OX0 Air GC 13 N/A 05/16/12 120516001 <br />Parameter Sample Conc DUP Cone RPD RPD CL Qualifiers <br />TPH as Gasoline 2923 2626 11 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 />