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Page 17 of 27 <br />L alscience <br />nvironmen#al Quality Control - LCS/LCS Duplicate <br />aborafories, Inc. <br />Cardno ERI Date Received: N/A <br />601 North McDowell Blvd. Work Order No: 11-09-1580 <br />Petaluma, CA 94954-2312 Preparation: EPA 5030C <br />Method: EPA 8015B (M) <br />Project: ExxonMobil99CAS/022789C <br />Date Date LCS/LCSD Batch <br />Quality Control Sample ID M itnx Instrument Prepared Analyzed Number <br />099-12-279-4,711 Solid GC 42 09/23/11 09/23/11 1109231301 <br />Parameter <br />TPH as Gasoline <br />SPIKE ADDED LCS %REC LCSD %REC %REC CL RPD <br />10.00 88 <br />RPD - Relative Percent Difference , CL - Control Limit <br />88 70-124 0 <br />RPD CL Qualifiers <br />0-18 <br />7440 Lincoln Way, Garden Grove, CA 92841-1427 . TEL:(714) 895-5494 . FAX: (714) 894-7501 <br />