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L;alscience <br />H.PWronmental <br />,L aboratories, Inc. <br />Cardno ERI <br />601 North McDowell Blvd. <br />Petaluma, CA 94954-2312 <br />Project: ExxonMobil99CAS/022789C <br />Quality Control - Duplicate <br />Date Received: <br />Work Order No: <br />Preparation: <br />Method: <br />Page 5 of 10 <br />a . .:.. 0� <br />n 4X <br />03/28/12 <br />12-03-1849 <br />N/A <br />EPA TO -3M <br />Date Date Duplicate Batch <br />Quality Control Sample ID Matrix Instrument pared: Anted: Number <br />V43SCHG Air GC 13 WA 03=12 1203261701 <br />ParamebBr Sample Cori DUP Conc RPD RPD CL Qualifiers <br />TPH as Gasoline 72.52 69.10 5 0-20 <br />RPD - Relative Percent Ditterence , CL - Control Limit <br />7440 Lincoln Way, Garden Grove, CA 92841-1427 . TEL:(714) 895-5494 . FAX: (714) 894-7501 <br />