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Page 8 of 18 <br />GZ alscience <br />environmental Quality Control - Spike/Spike Duplicate <br />L. aboratories, Inc. <br />Cardno ERI Date Received: 09/01/11 <br />601 North McDowell Blvd. Work Order No: 11-09-0022 <br />Petaluma, CA 94954-2312 Preparation: EPA 5030C <br />Method: EPA 8015B (M) <br />Project ExxonMobil99CAS/022789C <br />Quality Control Sample ID <br />Date <br />Matrix Instrument Prepared <br />Date <br />Analyzed <br />MS/MSD Batch <br />Number <br />S-34-SVE5 <br />Solid GC 22 09/03/11 <br />09/03/11 <br />110903501 <br />Parameter <br />MS %REC MSD %REC %REC CL <br />RPD RPD CL <br />Qualifiers <br />TPH as Gasoline 88 88 48-114 0 0-23 <br />RPD • Reis Ilve Percent Difference . CI_ - Control Limll <br />7440 Lincoln Way, Garden Grove, CA 92841-1427 . TEL:(714) 895-5494 . FAX: (714) 894-7501 <br />