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404 N.Wiget Lane <br /> Sequoia Walnut Creek, 94598 <br /> -9600 <br /> 4 (925)98 8-9600 <br /> Analytical wFAX(925)988-9673 <br /> ww.sequoialabs.coabs.com <br /> Gettler Ryan, Inc.-Dublin Project: Tosca <br /> 6747 Sierra Court Suite,1 Project Number: Tosco# 11195 Reported: <br /> Dubiiu CA,94568 Project Manager: Doug Lee 11-Mar-02 07:42 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT - 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 2B28002- BPA 5030B P/T <br /> Blank(2B28002-BLKI) Prepared&Analyzed:28-176-02 <br /> Purgeable Hydrocarbons(C6-C12) ND 50 1Jg11 <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) ND 2.5 " <br /> Surrogate:u,a,a-Tri luorololuene 37.6 30.0 125 70-130 <br /> Blank(2B28002-BLK2) Prepared&Analyzed:06-Mar-02 <br /> Purgeable Hydrocarbons <br /> C- NDND 50 ug/l <br /> Benzene ND 0.50 " <br /> `' uene ND 0.50 „ <br /> "'i✓rtliylbenzene ND 0.50 " <br /> Xylenes(total) ND 0.50 " <br /> Methyl tent-butyl ether(MTBE) ND 2.5 <br /> Surrogate:a,a,a-Tri luorotoluene 30.3 30.0 101 70-130 <br /> LCS(2B28002-BSI) Prepared&Analyzed: 28-Feb-02 <br /> Benzene W 21.7 0.50 ugh 20.0 108 70-130 <br /> Toluene 21.7 0.50 20.0 108 70-130 <br /> Ethylbenzene 19.1 0.50 20.0 96 70-130 <br /> Xylenes(total) 60.8 0.50 60.0 101 70-130 <br /> Surrogate:a,a,a-Tri luorolohiene 33.4 30.0 111 70-130 <br /> LCS(2B28002-BS2) Prepared&Analyzed:06-Mar-02 <br /> Benzene 20.6 0.50 ng11 20.0 103 70-130 <br /> Toluene 20.7 0.50 20.0 104 70-130 <br /> Ethylbenzene. 20.5 0.50 20.0 102 70-130 <br /> Xylenes(total) 65.9 0.50 60.0 110 70-130 <br /> Surrogate a,a,a-Tr7uorotohiene 32.7 30.0 109 70-130 <br /> II <br /> duoia 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 enitrety. <br /> �I <br /> 6 of 10 <br />