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Page 10 of 20 <br />Calscience <br />environmental Quality Control - Spike/Spike Duplicate <br />AL abora tories, Inc. <br />Cardno ERI <br />Date Received: <br />09/28/11 <br />601 North McDowell Blvd. <br />Work Order No: <br />11-09-1798 <br />Petaluma, CA 94954-2312 <br />Preparation: <br />EPA 3550B <br />Method: <br />EPA 8015B (M) <br />Project ExxonMobil99CAS/022789C <br />Date <br />Date MS/MSD Batch <br />Quality Control Sample ID Matrix <br />Instrument Prepared <br />Analyzed Number <br />11-10-0275-2 Solid <br />GC 45 10/06/11 <br />10/06/11 111006501 <br />Parameter SPIKE ADDED MS %REC MSD %REC %REC CL RPD RPD CL Qualifiers <br />TPH as Diesel 400.0 98 93 64-130 6 0-15 <br />RPD -Relative Percent Difference , CL - Control Limit <br />4". <br />7440 Lincoln Way, Garden Grove, CA 92841-1427 . TEL:(714) 895-5494 . FAX: (714) 894-7501 <br />