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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 />Date Received: <br />Work Order No: <br />Preparation: <br />Method: <br />Page 25 of 33 <br />N/A <br />12-05-0453 <br />EPA 5030C <br />EPA 8015B (M) <br />Project: ExxonMobil99CAS/022789C <br />Date Date LCS/LCSD Batch <br />Quality Control S.,7irnple ID Matrix Instrument Prepared Analyzed Number <br />099-12-436-7,412 Aqueous GC 11 05/08112 05108112 120508801 <br />Parameter SPIKE ADDED LCS %REC LCSD %REC %REC CL RPD RPD CL Qualifiers <br />TPH as Gasoline 2000 87 90 78-120 3 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 />