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Lz alscience <br />""nvironmenta! <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 11 of 16 <br />N/A <br />11-09-1800 <br />EPA 5030C <br />EPA 8015B (M) <br />RPD - Relative Percent Difference CL - Control Limit <br />,,,,A 7440 Lincoln Way, Garden Grove, CA 92841-1427 . TEL:(714) 895-5494 . FAX: (714) 894-7501 <br />Date <br />Dale <br />LCS/LCSD Batch <br />Quality Control Sample ID <br />Matrix Instrument Prepared <br />Anal ed <br />Number <br />099-12-436-6,671 <br />Aqueous GC 18 09/29/11 <br />09/29/11 <br />110929601 <br />Parameter <br />SPIKE ADDED LCS %REC LCSD %REC <br />%REC CL RPD <br />RPD CL Qualifiers <br />TPH as Gasoline <br />2000 97 94 <br />78-120 3 <br />0-10 <br />RPD - Relative Percent Difference CL - Control Limit <br />,,,,A 7440 Lincoln Way, Garden Grove, CA 92841-1427 . TEL:(714) 895-5494 . FAX: (714) 894-7501 <br />