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Page 55 of 82 <br /> alscience <br /> nvironmental Quality Control - Spike/Spike Duplicate <br /> aboratories, Inc. <br /> Parsons Date Received: 07/10/08 <br /> 2121 North California Blvd., Suite 500 Work Order No: 08-07-0848 <br /> Walnut Creek, CA 94596-7305 Preparation: EPA 50308 <br /> Method: EPA 80158 (M) <br /> Proiect Former Tracy MGP <br /> Date Date MS/MSD Batch <br /> Quality Control Sample ID Matrix Instrument Prepared Analyzed Number <br /> BK-TR-4 Solid GC 22 07/14/08 07/14/08 080714S01 <br /> Parameter MS%REC MSD%REC %REC CL RPD RPD CL Qualifiers <br /> TPH as Gasoline 48 109 48-114 78 0-23 4 <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 />