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alscience <br />Environmental <br />1 aboratories, Inc. <br />Cardno ERI <br />601 North McDowell Blvd. <br />Petaluma, CA 94954-2312 <br />Quality Control - LCS/LCS Duplicate <br />Project: ExxonMobil99CAS/022789C <br />Date Received: <br />Work Order No: <br />Preparation: <br />Method: <br />Page 12 of 18 <br />N/A <br />11-09-0022 <br />EPA 5030C <br />EPA 8015B (M) <br />Date Date LCS/LCSD Batch <br />Quality Control Sample ID Matrix Instrument Prepared Analyzed Number <br />099-12-279-4,657 Solid GC 22 09/03/11 09/03/11 110903801 <br />Parameter LCS %REC LCSD %REC %REC CL RPD RPD CL Qualifiers <br />TPH as Gasoline 90 91 70-124 1 0-18 <br />t <br />v <br />0 <br />o <br />0 <br />C2 <br />RPE3 - Relative Percent Difference , CL - Control Limit <br />J'k" 7440 Lincoln Way, Garden Grove, CA 92841-1427 . TEL:(714) 895-5494. FAX: (714) 894-7501 <br />