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G aiscience <br />Ac�nvironmentai <br />Ir 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 11 of 18 <br />N/A <br />11-09-0022 <br />EPA 3550B <br />EPA 8015B (M) <br />Date Cate LCS/LCSD Batch <br />Quality Control Sample ID Matrix Instrument Prepared Analyzed Number <br />099-12-275.4,114 Solid GC 45 09/02/11 09/03/11 1109021309 <br />Parameter LCS %REC LCSD %REC %REC CL RPD RPD CL Qualifiers <br />TPH as Diesel 102 105 75-123 3 0-12 <br />RPD - Relative Percent Difference , CL - Control Limit <br />dtikk.4 7440 Lincoln Way, Garden Grove, CA 92841-1427 . TEL:(714) 895-5494 . FAX: (714) 894-7501 <br />