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Page 30 of 38 <br /> alscience o0A <br /> =nvironmental Quality Control - LCS/LCS Duplicate Q°ne. <br /> AM aboratories, Inc. <br /> . f <br /> Parsons Date Received: N/A <br /> 2121 North California Blvd., Suite 500 Work Order No: 09-04-0752 <br /> Walnut Creek, CA 94596-7305 Preparation: EPA 3050B <br /> Method: EPA 6010B <br /> Project: Former Tracy MGP /444534.02000 <br /> Date Date LCS/LCSD Batch <br /> Quality Control Sample ID Matrix Instrument Prepared Analyzed Number <br /> 097-01-002-12,186 Solid ICP 5300 04/10/09 04/10/09 09041OL03 <br /> Parameter LCS%REC LCSD%REC %REC CL ME CL RPD RPD CL Qualifiers <br /> Antimony 95 94 80-120 73-127 1 0-20 <br /> Arsenic 92 91 80-120 73-127 2 0-20 <br /> Barium 102 101 80-120 73-127 1 0-20 <br /> Beryllium 94 93 80-120 73-127 1 0-20 <br /> Cadmium 99 98 80-120 73-127 1 0-20 <br /> Chromium 95 94 80-120 73-127 1 0-20 <br /> Cobalt 104 103 80-120 73-127 1 0-20 <br /> Copper 96 96 80-120 73-127 0 0-20 <br /> Lead 103 102 80-120 73-127 1 0-20 <br /> Molybdenum 101 100 80-120 73-127 1 0-20 <br /> Nickel 103 102 80-120 73-127 1 0-20 <br /> Selenium 94 93 80-120 73-127 1 0-20 <br /> Silver 98 97 80-120 73-127 1 0-20 <br /> Thallium 98 97 80-120 73-127 1 0-20 <br /> Vanadium 95 95 80-120 73-127 1 0-20 <br /> Zinc 101 100 80-120 73-127 1 0-20 <br /> Total number of LCS compounds: 16 <br /> Total number of ME compounds : 0 <br /> Total number of ME compounds allowed: 1 <br /> LCS ME CL validation result: Pass <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 />