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Caalscience <br />C <br />Environmental <br />Laboratories, 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 16 of 27 <br />N/A <br />11-09-1580 <br />EPA 5030C <br />EPA 8015B (M) <br />RPD - Relative Percent Difference , CL - Control Limit <br />�U " 7440 Lincoln Way, Garden Grove, CA 92841-1427 . TEL:(714) 895-5494. FAX: (714) 894-7501 <br />Date <br />Date <br />LCS/LCSD Batch <br />Quality Control Sample 1D <br />Matrix Instrument <br />Prepared <br />Analyzed <br />Number <br />099-12-279-4,712 <br />Solid GC 42 <br />09/23/11 <br />09/23/11 <br />1109231302 <br />Parameter <br />SPIKE ADDED LCS %REC <br />LCSD %REC <br />%REC CL RPD <br />RPD CL Qualifiers <br />TPH as Gasoline <br />10.00 88 <br />88 <br />70-124 0 <br />0-18 <br />RPD - Relative Percent Difference , CL - Control Limit <br />�U " 7440 Lincoln Way, Garden Grove, CA 92841-1427 . TEL:(714) 895-5494. FAX: (714) 894-7501 <br />