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Sequoia CA aoa N lane <br /> Walnut Creek CA 94596 <br /> 4 4D <br /> (925)988-9600 <br /> AFAX`925)9889673 <br /> Analytical <br /> www sequouoialabs cam <br /> Gettler Ryan,Inc - Dublin Project Chevron <br /> 6747 Sierra Court Suite I Project Number Chevron#1 9-8264 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 06-Aug-01 09 54 <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 IG19013-200 7 <br /> Blank(IG 19013-BLKI) Prepared 19-Jul-01 Analyzed 28-Jul-01 <br /> Cadmmm _ -- - --- ND- - 0 010 mg/] - — -- --�- ----- - - — <br /> Chromium ND 0 010 " <br /> Lead ND 0 020 <br /> Nickel ND 0 010 " <br /> Zinc ND 0 020 " <br /> LCS(IG19013-BSI) Prepared 19-Jul-01 Analyzed 28-Jul-01 <br /> Cadmium 109 0 010 mgt] 1 00 109 80-120 <br /> Chromium 105 0 010 100 105 80-120 <br /> Lead 110 0020 100 110 80-120 <br /> Nickel 110 0010 100 110 80-120 <br /> Zinc 1 03 0 020 1 00 103 80-120 <br /> WDup(1G19013-BSDI) Prepared 19-Jul-01 Analyzed 28-Jul-01 <br /> admmm Y �� 1 07 0 010—�mg/1^� 1 00 107 80-120 1 85 20 <br /> Chromium 105 0 010 1 00 105 80-120 Goo 20 <br /> Lead 1 05 0 020 1 00 105 80-120 465 20 <br /> Nickel 1 10 0 010 100 110 80-120 000 20 <br /> Zinc l 02 0 020 100 102 80-120 0 976 20 <br /> Matrix Spike(lG19013-MS1) Source W107309-02 Prepared 19-Jul-01 Analyzed 28-Jul-01 <br /> Cadmium _ 112 0010 mgll 100 ND 112— 80-120 <br /> Chromium 0 973 0 010 100 ND 973 80-120 <br /> Lead 0 858 0 020 1 00 ND 858 80-120 <br /> Nickel 110 0010 100 ND 110 80-120 <br /> Zinc 1 07 0 020 1 00 0 15 920 80-120 <br /> Matrix Spike Dup(1G19013-MSD1) Source W107309-02 Prepared 19-Jul-01 Analyzed 28-Jul-01 <br /> Cadmium 1 20 0 010 mg/I 100 ND 120 80-120 690 20 <br /> Chromium 1 13 0 010 100 ND 113 80-120 149 20 <br /> Lead 101 0 020 " 100 ND 101 80-120 163 20 <br /> Nickel 1 20 0 010 too ND 120 80-120 870 20 <br /> Zinc 118 0020 100 015 103 80-120 978 20 <br /> Sequoia Analytical - Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 15 of 24 <br />