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Sequoia 404 N. CLane <br /> Walnut t Creek,,CAA 94598 <br /> (925)988-9600 <br /> Analytical wFAX(925)988-9673 <br /> ww.sequoialabs.com <br /> Gettler Ryan,Inc. -Dublin Project: Tosco <br /> 6747 Sierra Court Suite J Project Number: Tosco# 11195 Reported: <br /> Dublin CA, 94568 Project Manager: Doug Lee 1 I-Mar-02 07:42 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT <br /> Sequoia Analytical -Walnut Creek <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> B-4(W202365-04)Water Sampled:25-Feb-02 00:00 Received:25-Feb-02 17:50 <br /> Purgeable Hydrocarbons(C6-C]2) ND 50 ugll 1 2B28002 28-Feb-02 28-Feb-02 EPA <br /> 8015M18021 <br /> Benzene ND 0.50 " <br /> Toluene ND 0.50 " <br /> Ethylbenzene ND 0.50 " <br /> Xylenes(total) ND 0.50 " <br /> Methyl tert-butyl ether(MTBE) 12 2.5 " <br /> Surrogate:a,a,a-Tris luorotolriene 118% 70-130 " 11 " <br /> B-5(W202365-05)Water Sampled:25-Feb-02 00:00 Received:25-Feb-02 17:50 <br /> Purgeable Hydrocarbons(C6-C12) ND 50 ugll 1 2B28002 06-Mar-02 06-Mar-02 EPA <br /> 9015MM021 <br /> Benzene ND 0.50 " <br /> .Toluene ND 0.50 " <br /> E::>>'-: yfUenzene ND 0.50 " <br /> ;xylenes (total) 2.8 0.50 QR-04 <br /> Methyl tert-butyl ether(MTBE) 6.2 2.5 Q-28,QR-04 <br /> Surrogate: a,a,a-Trifluorotoluene 109% 70-130 lo <br /> The results in This report apply to the samples analyzed in accordance with the chain of <br /> )uoia Analytical- Walnut Creek <br /> custody docaonent. This analytical report must be reproduced in its entirety. <br /> 3 of 10 <br />