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a— ) (9404 N Wiget lane <br /> Sequoia Walnut Creek,CA 94598 <br /> i Analytical <br /> 25)988-9600 <br /> FAX(925)988-9673 <br /> WWW yequoialabs can <br /> Gettler Ryan,Inc -Dublin Project Tosco W208192 <br /> 6747 Sierra Court Suite! Project Number Tosco# 11192 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 18-Oct-02 12 52 <br /> Gasollne\BTEXIOxygenates by EPA method 8260B <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-7(W208192-07)Water Sampled 08-Aup.-02 16 00 Received 09-Aug-02 16 15 _ <br /> Benzene ND 050 ug/1 1 2080122 14-Aug-02 14-Aug-02 EPA 82608 <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Gasoline(C6-CIO) 240 50 HC-12 <br /> Surrogate 1,2-DCA-d4 101 % 60-140 " <br /> Surrogate Toluene-d8 111 % 60-140 " <br /> Surrogate 4-BFB 104% 60-140 " <br /> MW-8(W208192-08)Water Sampled 08-Aug-021000 Received 09-Aug-02 I6 15 <br /> Benzene ND - 050 ug/l 1 2080122 14-Aug-02 14-Aug-02 EPA 8260B <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xyienes(total) ND 050 <br /> Gasoline(C6-CIO) ND 50 <br /> Surrogate 1,1-DCA-d4 103% 60-140 " <br /> Surrogate Toluene-d8 110% 60-140 - L <br /> Surrogate 4-BFB 100% 60-140 <br /> r <br /> I <br /> MW-9(W208192-09)Water Sampled 08-Aug-02 10 45 Received 09-Aug-02 16 15 - - <br /> Benzene ND 050 ug/1 1 2080122 14-Aug-02 14-Aug-02 EPA 8260B <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 050 " <br /> Gasoline(C6-C10) ND 50 " <br /> Surrogate 1,2-DCA-d4 103% 60-140 " <br /> Surrogate Toluene-d8 108% 60-140 " <br /> Surrogate 4-BFB 103% 60-140 " <br /> Sequoia Analytical-Walnut Creek The results to this report apply to the samples analyzed in accordance with the chain <br /> custody document Unless otherwise slated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> 9of17 <br />