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G. alscience <br />nvironmental <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 9 of 14 <br />N/A <br />11-09-0023 <br />EPA 5030C <br />EPA 80158 (M) <br />Date Dale LCSILCSO Batch <br />Quality Control Sample ID Matrix Instrument Prepared Analyzed Number <br />099-12-436-6,585 Aqueous GC 18 09/01/11 09/02/11 110901602 <br />Parameter LCS %REC LCSD %REC %REC CL RPD RPD CL Qualiffers <br />TPH as Gasoline 84 83 78-120 1 0-10 <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 />