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Page 7 of 17 <br />alscience <br />Zovironmental Quality Control - Spike/Spike Duplicate <br />L aboratories, Inc. <br />Cardno ERI Date Received: 08/26/11 <br />601 North McDowell Blvd. Work Order No: 11-08-1795 <br />Petaluma, CA 94954-2312 Preparation: EPA 35508 <br />Method: EPA 80158 (M) <br />Project ExxonMobil99CAS/022789C <br />Date Date MS/MSD Batch <br />Quality Control Sample ID Matrix Instrument Prepared Analyzed Number <br />11-08-1677-1 Solid GC 46 08/26/11 08/26/11 110826501 <br />Parameter MS %REC MSD %REC %REC CL RPD RPD CL Qualifiers <br />TPH as Diesel 251 503 64-130 32 0-15 HX,BA <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 />