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Control <br /> Quality Results <br /> Client: Earth Tech, Inc. Job Number: 720-14778-1 <br /> Matrix Spike/ Method: 60106 <br /> Matrix Spike Duplicate Recovery Report-Batch: 720-36938 Preparation: Soluble Metals <br /> Dissolved <br /> ' MS Lab Sample ID: 720-14720-A-6-B MS Analysis Batch: 720-36950 Instrument ID: Varian ICP <br /> Client Matrix: Water Prep Batch: 720-36938 Lab File ID: N/A <br /> Dilution: 1.07 Initial Weight/Volume: <br /> Date Analyzed: 06/18/2008 1837 Final Weight/Volume: 1.0 mL <br /> Date Prepared: 06/18/2008 1733 <br /> MSD Lab Sample ID: 720-14720-A-6-C MSD Analysis Batch: 720-36950 Instrument ID: Varian ICP <br /> Client Matrix: Water Prep Batch: 720-36938 Lab File ID: N/A <br /> Dilution: 1.07 Initial Weight/Volume'. <br /> Date Analyzed: 06/18/2008 1841 Final Weight/Volume: 1.0 mL <br /> Date Prepared: 06/18/2008 1733 <br /> % Rec. <br /> Analyte MS MSD Limit RPD RPD Limit MS Qual MSD Qual <br /> Antimony .._.__� 97------101 75-125 4 20 <br /> Arsenic 100 105 75-125 5 20 <br /> Barium 104 106 75-125 2 20 <br /> Beryllium 103 105 75-125 2 20 <br /> Cadmium 97 99 75- 125 2 20 <br /> Chromium 102 103 75-125 2 20 <br /> Cobalt 98 99 75-125 2 20 <br /> Copper 101 103 75-125 2 20 <br /> Lead 96 97 75-125 2 20 <br /> Molybdenum 103 105 75- 125 2 20 <br /> Nickel 98 99 75- 125 2 20 <br /> Selenium 113 114 75- 125 1 20 <br /> Silver 95 97 75- 125 2 20 <br /> Thallium 92 94 75-125 2 20 <br /> Vanadium 102 104 75- 125 2 20 <br /> Zinc 97 98 75- 125 2 20 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> TestAmerica San Francisco Page 46 of 51 <br />