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Page 8 of 16 <br />C alscience <br />& nvironmenifal Quality Control - LCS/LCS Duplicate <br />Laboralaries, Inc. <br />Cardno ERI Date Received: N/A <br />601 North McDowell Blvd. Work Order No: 11-09-1579 <br />Petaluma, CA 94954-2312 Preparation: EPA 3510C <br />Method: EPA 8015B (M) <br />Project: ExxonMobil99CAS/022789C <br />Date Date LCSILCSD Balch <br />Quality Control Sample ID Matrix Instrument Prepared Anal zed Number <br />099-12-330-2,015 Aqueous GC 46 09/23/11 09/26/11 110923609 <br />Parameter SPIKE ADDED LCS %REC LCSD %REC %REC CL RPD RPD CL Qualifiers <br />TPH as Diesel 2000 98 100 75-117 2 0-13 <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 />