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GeoAnalytical Laboratories, Inc. <br /> 1405 Kansas Avenue Modesto,CA 95351 Phone (209)572-0900 Fax (209)572-0916 <br /> Report# Q289-01 QC REPORT <br /> San Joaquin County Environmental Health <br /> 304 E.Weber 3rd Floor <br /> Stockton CA 95202 <br /> MMS MSD LCS <br /> Analyte Method Batch # Dates Analyzed Orig. Dupl. %Rec %Rec RPD %Rec Blank Comments <br /> Antimony 6020 I06847 10/20/04 103.6 96.4 3.0 98.6 ND <br /> Arsenic 6020 106848 10/20/04 109.2 108.5 0.6 99.7 ND <br /> Barium 6010B I06849 10/20/04 105.0 83.0 2.0 95.2 ND <br /> Beryllium 6010B 106850 10/20/04 98.1 94.9 3.3 97.6 ND <br /> Cadmium 6010B I06851 10/20/04 98.3 95.6 2.8 102.3 ND <br /> Chromium 6020 I06852 10/20/04 104.3 99.6 2.9 103.1 ND <br /> Cobalt 6010B I06853 10/20/04 95.5 92.5 2.6 104.8 ND <br /> Copper 6020 106854 10/20/04 114.1 114.3 0.2 ND Sample analyte concentration too high to spike. <br /> Lead 6020 I06855 10/20/04 93.0 94.6 0.7 99.3 ND <br /> Mercury 7470A 106856 10/20/04 92.4 88.0 3.6 95.2 ND <br /> Molybdenum 6010B I06857 10/20/04 99.4 93.2 3.5 95.1 ND <br /> Nickel 6010B 106858 10/20/04 111.2 102.2 2.7 105.1 ND <br /> Selenium 6020 I06859 10/20/04 84.2 84.6 0.5 102.4 ND <br /> Silver 6010B I06860 10/20/04 112.0 113.4 1.2 120.0 ND <br /> Thallium 6020 I06861 10/20/04 107.2 107.5 0.3 105.0 ND <br /> Vanadium 6010B 106862 10/20/04 97.3 94.4 2.4 102.1 ND <br /> Zinc 6010B I06863 10/20/04 104.5 104.0 * 0.5 ND Sample analyte concentration too high to spike. <br /> *LCS/LCSD (see comments) <br /> G� <br /> ohit Bombaywa a Donna Keller <br /> Inorganic Supervisor Certification # 1157 Laboratory Director <br />