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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 /> MS MSD LCS <br /> Analyte Method Batch # Dates Analyzed Orig. Dupl. %Rec %Rec RPD %Rec Blank Comments <br /> Antimony 6020 I06827 10/20/04 104.6 106.2 1.3 100.8 ND <br /> Arsenic 6020 I06828 10/20/04 108.4 105.6 2.3 99.8 ND <br /> Barium 6010B I06829 10/20/04 89.2 102.0 1.2 98.6 ND <br /> Beryllium 6010B 106830 10/20/04 99.8 101.0 1.2 99.6 ND <br /> Cadmium 6010B I06831 10/20/04 101.4 102.4 0.7 103.6 ND <br /> Chromium 6010B I06832 10/20/04 102.0 100.6 0.8 105.6 ND <br /> Cobalt 6010B I06833 10/20/04 106.4 105.8 0.5 108.2 ND <br /> Copper 6010B I06834 10/20/04 115.6 117.4 * 1.5 ND Sample analyte concentration too high to spike. <br /> Lead 6010B I06835 10/20/04 95.8 97.2 0.4 99.2 ND <br /> Mercury 6020A 106836 10/20/04 107.2 105.6 1.5 105.6 ND <br /> Molybdenum 6010B I06837 10/20/04 98.4 96.8 * 1.6 ND Sample analyte concentration too high to spike. <br /> Nickel 6010B I06838 10/20/04 108.0 108.4 0.2 109.6 ND <br /> Selenium 6020 I06839 10/20/04 115.2 110.4 4.3 103.6 ND <br /> Silver 6010B I06840 10/20/04 104.0 103.7 0.3 108.7 ND <br /> Thallium 6020 I06841 10/20/04 102.2 101.0 1.2 104.6 ND <br /> Vanadium 6010B 106842 10/20/04 100.4 99.6 0.5 104.1 ND <br /> Zinc 6010B I06843 10/20/04 83.6 91.6 0.4 105.8 ND <br /> *LCS/LCSD (see comments) <br /> i Bo ba a Donna Keller <br /> Inorganic Supervisor Certification # 1157 Laboratory Director <br />