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404 N Wiget Lane <br /> Walnut Geek CA 94598 <br /> Sequoia (925)988-9600 <br /> 4,5)- FAX(925)988-9673 <br /> Analytical `vww sequolalabs com <br /> Gettler Ryan,Inc -Dublin Project Chevron <br /> 6747 Sierra Court Suite J Project Number Chevron 4 9-8264 Reported <br /> Dublin CA,94568 Project Manager Deanna L Hardmg 12-Mar-01 08 00 <br /> Dissolved Metals by EPA 200 Series Methods - Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1C06008 -200.7 <br /> Blank(1C06008-BLKI) Prepared 06-Mar-Ol Analyzed 08-Mar-Ol <br /> Cadmium ND 0 010 mg/l <br /> Chromium ND 00100 " <br /> Lead ND 00200 " <br /> Nickel ND 00100 <br /> Zinc ND 00100 " <br /> LCS(1C06008-BSI) Prepared 06-Mar-01 Analyzed 08-Mar-01 <br /> Cadmium 102 0 010 mg/I 100 102 80-120 <br /> Chromium 0 929 0 0100 100 929 80-120 <br /> lead 100 00200 100 100 80-120 <br /> Nickel 0 976 00100 too 976 80-120 <br /> 105 00100 too 105 80-120 <br /> OS Dup(1C06008-BSD1) Prepared 06-Mar-01 Analyzed 08-Mar-01 <br /> Cadmium 102 0 010 mg/1 100 102 80-120 0 20 <br /> Chromium 0 938 00100 too 938 80-120 0 964 20 <br /> Lead 101 00200 100 101 80-120 0 995 20 <br /> Nickel 0 993 00100 100 993 80-120 173 20 <br /> Zinc 103 00100 100 103 80-120 192 20 <br /> Matrix Spike(IC06008-MSI) Source W102553-02 Prepared 06-Mar-Ol Analyzed 08-Mar-Ol <br /> Cadmium 0 976 0 010 mg/1 100 ND 976 80-120 <br /> Chromium 0 862 00100 100 ND 862 80-120 <br /> Lead 0 894 00200 " 100 ND 894 80-120 <br /> Nickel 0 915 00100 too ND 915 80-120 <br /> Zinc 115 00100 too 00605 109 80-120 <br /> Matrix Spike Dup (IC06008-MSD1) Source W102553-02 Prepared 06-Mar-Ol Analyzed 08-Mar-01 <br /> Cadmium 0 959 0 010 mg/I 100 ND 959 80-120 176 20 <br /> Chromium 0 844 00100 100 ND 844 80-120 211 20 <br /> Lead 0 862 00200 100 ND 862 80-120 364 20 <br /> Nickel 0 890 00100 100 ND 990 80-120 277 20 <br /> Zinc 105 00100 too 00605 989 80-120 909 20 <br /> uoia Analytical-Walnut Creek The results to this report apply to the samples analyzed in accordance with the churn of <br /> custody document This analytical report must be reproduced to its entirety <br /> Page 13 of 21 <br />