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Page 38 of 56 <br /> alscience <br /> nvironmental Quality Control - Spike/Spike Duplicate <br /> aboratories, Inc. <br /> Parsons Date Received: 08/27/08 <br /> 2121 North California Blvd., Suite 500 Work Order No: 08-08-2353 <br /> Walnut Creek, CA 94596-7305 Preparation: EPA 3010A Total <br /> Method: EPA 60108 <br /> Proiect Former Tracy MGP <br /> Date Date MS/MSD Batch <br /> Quality Control Sample ID Matrix Instrument Prepared Analyzed Number <br /> 08-08-2090-5 Aqueous ICP 5300 08/25/08 08/27/08 080827SA3 <br /> Parameter MS%REC MSD%REC %REC CL RPD RPD CL Qualifiers <br /> Antimony 96 97 72-132 0 0-10 <br /> Arsenic 111 111 80-140 0 0-11 <br /> Barium 100 100 87-123 0 0-6 <br /> Beryllium 101 102 89-119 0 0-8 <br /> Cadmium 104 104 82-124 0 0-7 <br /> Chromium 99 99 86-122 0 0-8 <br /> Cobalt 100 100 83-125 0 0-7 <br /> Copper 104 104 78-126 0 0-7 <br /> Lead 99 99 84-120 0 0-7 <br /> Molybdenum 105 105 78-126 0 0-7 <br /> Nickel 101 101 84-120 0 0-7 <br /> Selenium 106 104 79-127 1 0-9 <br /> Silver 101 103 86-128 2 0-7 <br /> Thallium 101 101 79-121 1 0-8 <br /> Vanadium 102 102 88-118 0 0-7 <br /> Zinc 107 103 89-131 4 0-8 <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 />