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Page 15 of 27 <br />L alscrence <br />&nvâ–şronmental Quality Control - LCS/LCS Duplicate <br />Air aboratories, 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 3550B <br />Method: EPA 8015B (M) <br />Project: ExxonMobil99CAS/022789C <br />Date Date LCS/LCSD Batch <br />Quality Control Sample ID Matrix Instrument Prepared Analyzed Number <br />099-12-275-4,148 Solid GC 46 09/28/11 09/28/11 110928610 <br />Parameter SPIKE ADDED LCS %REC LCSD %REC %REC CL RPD RPD CL OU311ners <br />TPH as Diesel 400.0 96 92 75-123 4 0-12 <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 />