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GeoAnalytical Laboratories, Inc. <br /> 1405 Kansas Avenue Modesto,CA 95351 Phone (209)572-0900 Fax(209)572-0916 <br /> Report# Q062-21 QC REPORT <br /> San Joaquin County Environmental Health <br /> 304 E.Weber 3rd Floor <br /> Stockton CA 95202 <br /> MS MSD LCS <br /> Analyte Method Batch # Dates Analyzed Orig. Dupl. %Rec %Rec RPD %Rec Blank Comments <br /> A. ,6ny 7041 I01137 03/04/04 109.0 105.0 0.6 103.0 ND <br /> Arsenic 7060A I01138 03/04/04 103.0 96.9 * 6.1 ND Matrix interference(diluted out MS/MSD) <br /> Barium 6010B 101139 03/04/04 108.0 109.0 * 0.9 ND Sample analyte concentration too high to spike. <br /> Beryllium 6010B 101140 03/04/04 101.0 80.6 22.5 9.2 ND <br /> Cadmium 6010B 101141 03/04/04 97.1 86.3 11.8 89.2 ND <br /> Chromium 6010B I01142 03/04/04 119.0 119.0 * 0.0 ND Sample analyte concentration too high to spike. <br /> Cobalt 6010B I01143 03/04/04 96.1 97.1 * 1.0 ND Sample analyte concentration too high to spike. <br /> Copper 6010B 101144 03/04/04 110.0 115.0 * 4.4 ND Sample analyte concentration too high to spike. <br /> Lead 6010B 101145 03/04/04 97.0 97.0 0.0 108.8 ND <br /> Mercury 7471A I01146 03/04/04 98.4 81.2 13.3 120.0 ND <br /> Molybdenum 6010B I01147 03/04/04 119.0 104.0 * 13.5 ND Sample analyte concentration too high to spike. <br /> Nickel 6010B I01148 03/04/04 103.7 104.8 * 1.1 ND Sample analyte concentration too high to spike. <br /> Selenium 7740 101149 03/04/04 88.2 85.7 * 2.9 ND Matrix interference(diluted out MS/MSD) <br /> Silver 6010B 101150 03/04/04 108.8 108.8 * 0.0 ND Matrix interference(diluted out MS/MSD) <br /> Thallium 7841 101151 03/04/04 116.0 100.0 14.8 114.0 ND <br /> V, )um 6010B 101152 03/04/04 94.8 97.2 * 2.5 ND Sample analyte concentration too high to spike. <br /> Zinc 6010B I01153 03/04/04 98.7 98.9 * 0.2 ND Sample analyte concentration too high to spike. <br /> *LCS/LCSD (see comments) Y? <br /> 1 omb a Donna Keller <br /> Inorganic Supervisor Certification # 1157 Laboratory Director <br />