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alscience <br />�n vironmental <br />aboratiorles, Inc. <br />Cardno ERI <br />601 North McDowell Blvd. <br />Petaluma, CA 94954-2312 <br />Project: ExxonMobil99CAS/022789C <br />Page 5 of 12 <br />AOCOD <br />Quality Control - Duplicate <br />Date Received: 04/19/12 <br />Work Order No: 12-04-1177 <br />Preparation: N/A <br />Method: EPA TO -3M <br />Date Date Duplicate Batch <br />Quality Control Sample ID Matrix Instrument Prepared: Analyzed: Number <br />V-DSCHG Air GG 13 NIA 04/19/12 120419DO1 <br />Parameter Sample Conc DUP Cane RPD RPD CL Qualifiers <br />TPH as Gasoline 151.0 152.9 1 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 />