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alscienoe <br />nvironrnental <br />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 24 of 33 <br />ACC•^ .i <br />N/A <br />12-05-0453 <br />EPA 3510C <br />EPA 8015B (M) <br />RPD - Relative Percent Difference . CL - Control Limit <br />7440 Lincoln Way, Garden Grove, CA 92841-1427 . TEL:(714) 895-5494. FAX: (714) 894-7 50 1 <br />Date <br />Date <br />LCS/LCSD Batch <br />Quality Control Sample ID <br />Matrix Instrument Prepared <br />Analyzed <br />Number <br />099-12.330.2,222 <br />Aqueous GC 47 05/07/12 <br />05/07/12 <br />120507609 <br />Parameter <br />SPIKE ADDED LCS %REC LCSD %REC <br />%REC CL RPD <br />RPD CL Qualifiers <br />TPH as Diesel <br />2000 91 96 <br />75-117 5 <br />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) 894-7 50 1 <br />