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404 N Wiget Lane <br /> Sequoia Walnut Cry,CA 94598 <br /> (925)988-9600 <br /> Analytical FAX(925)988-9673 <br /> www mquoialabs can <br /> ettler Ryan,Inc -Dublin Project Tosco W208192 <br /> 47 Sierra Court Suite J Project Number Tosco# 11192 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 1$-Oct-02 12 52 <br /> Gasoline\BTEX\Oxygenates by EPA method 8260B <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW4(W208192-04)Water Sampled 08-Aug-02 12 55 Received 09-Aug-02 16 15 _ <br /> Benzene ND 050 ugA 1 2080122 14-Aug-02 14-Aug-02 EPA 8260B <br /> Toluene ND 050 1. " <br /> Ethylbenzene ND 050 " to <br /> Xylenes(total) ND 050 " <br /> Gasoline(C6-CID) 220 50 HC-19 <br /> Surrogate 1,2-DCA-d4 96% 60-140 " <br /> Surrogate Toluene-d8 110% 60-140 <br /> Surrogate 4-BFB 105% 60-140 " <br /> MW-5(W208192-05)Water Sampled 08-Aug-02 12 15 Received_09-Aug-02 16 15 <br /> Benzene ND 050 ug/l 1 2080122 14-Aug-02 14-Aug-02 EPA 8260E <br /> Toluene ND 050 " " <br /> Ethylbenzene ND 050 " " to <br /> Xylenes(total) ND 050 " " " " " to <br /> Gasoline(C6-C10) ND 50 11 " 11 <br /> Airogate 12-DCA-d4 102% 60-140 T " " <br /> ogate Toluene-d8 108% 60-140 " ,. <br /> 11 <br /> urrogate 4-BFB 103% 60-140 " 11 to <br /> MW-6(W208192-06)Water Sampled 08-Aug-021430 Received 09-Aug-02 16 15 <br /> Benzene ND 050 ugA 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 105% 60-140 ~ <br /> Surrogate Toluene-d8 109% 60-140 " <br /> Surrogate 4-BFB 105% 60-140 <br /> isola Analytical -Walnut Creek The results inthis report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> 8of17 <br />