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I <br /> Sequoia 4b4 N WiLane <br /> Walnut Creek CAA 94598 <br /> 4 (925)988-96M <br /> q„r AnalyticalID m FAX{925)988-9673 <br /> www sequoialabs ca <br /> 1 <br /> Gettler Ryan,Inc -Dublin Project Tosco <br /> 6747 Sierra Court Suite J Project Number Tosco 4 11193 Reported <br /> Dublin CA,94568 Project Manager Doug Lee 04-Jan-01 10 26 <br /> Total Metals 6y EPA 6040/7000 Series Methods - Quality Control <br /> Sequoia Analytical - Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Lunit Units Level Result %REC Limits RPD Limit Notes <br /> Batch OL21022-200 7 1 <br /> Matrix Spike(OL21022-MSI) Source W012313-01 Prepared 21-Dec-00 Analyzed 30-Dec-00 <br /> Cadmium 0 968 0 010 mg/1 100 ND 968 80-120 <br /> Chromium 103 0 010 <br /> too ND 103 80-120 <br /> Copper 113 0 010 1 00 0 014 112 80-120 <br /> Lead 0 929 0 020 100 ND 929 80-120 <br /> Nickel 0 989 0 010 100 0 012 977 80-120 <br /> Zinc 0 981 0 020 1 00 0 033 948 80-120 <br /> Matrix Spike Dup (OL21022-MSDl) - - Source W012313-01 Prepared 2l-Dec-00 Analyzed 30-Dec-00 <br /> Cadmium 0 999 0 010 mg/1 100 ND 999 80-120 3 15 20 <br /> Chromium 102 0 010 100 ND 102 80-120 0 976 20 <br /> Copper 1 10 0 010 1 00 0 014 109 80-120 269 20 <br /> Lead 0 927 0 020 1 00 ND 927 80-120 0 216 20 <br /> Nickel 100 0 010 too 0 012 988 80420 1 11 20 <br /> Zinc 107 0 020 100 0 033 104 80-120 868 20 <br /> 5k <br /> Sequoia Analytical-Walnut Creek The results in this report apply to the samples analyzed to accordance with the churn of <br /> custody document This analytical report must be reproduced in its enti-4 <br /> Page 14 of 27 <br />