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Page 71 of 89 <br /> alscience N A C C p 9O <br /> nvironmental Quality Control - LCS/LCS Duplicate Q° <br /> AIN aboratories, Inc. _ ne <br /> Parsons Date Received: N/A <br /> 2121 North California Blvd., Suite 500 Work Order No: 08-07-1058 <br /> Walnut Creek, CA 94596-7305 Preparation: EPA 3050B <br /> Method: EPA 6010B <br /> Project: Former Tracy MGP <br /> Date Date LCS/LCSD Batch <br /> Quality Control Sample ID Matrix Instrument Prepared Analyzed Number <br /> 097-01-002-11,235 Solid ICP 5300 07/14/08 07/14/08 08071411-07 <br /> Parameter LCS%REC LCSD%REC %REC CL RPD RPD CL Qualifiers <br /> Antimony 102 102 80-120 0 0-20 <br /> Arsenic 98 98 80-120 0 0-20 <br /> Barium 104 104 80-120 0 0-20 <br /> Beryllium 98 98 80-120 0 0-20 <br /> Cadmium 102 102 80-120 1 0-20 <br /> Chromium 98 98 80-120 0 0-20 <br /> Cobalt 103 102 80-120 1 0-20 <br /> Copper 100 100 80-120 0 0-20 <br /> Lead 102 102 80-120 0 0-20 <br /> Molybdenum 102 101 80-120 1 0-20 <br /> Nickel 106 105 80-120 1 0-20 <br /> Selenium 96 95 80-120 2 0-20 <br /> Silver 96 96 80-120 0 0-20 <br /> Thallium 102 100 80-120 2 0-20 <br /> Vanadium 98 98 80-120 0 0-20 <br /> Zinc 102 101 80-120 1 0-20 <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 />