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404 N.Wiget Lane <br /> Sequoia <br /> Walnut Creek,CA 94598 <br /> ' J (925)988-9600 <br /> FAX(925)988-9673 <br /> Analytical - _ www.sequoialabs.com <br /> Gettler Ryan,Inc.-Dublin Project: Tosco <br /> 6747 Sierra Court Suite'J Project Number: Tosco# 11192 Reported: <br /> Dublin CA,94568 Project Manager: Doug Lee 12-Dec;'00 17:18 <br /> ry r : <br /> Total Purgeable Hydrocarbons (C6-C12) and BTEX 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 /> i <br /> Batch OL04001-EPA 5030B [1P/TJ <br /> Blank(OL04001-BLK1)'j Prepared&Analyzed:04-Dec-00 <br /> Purgeable Hydrocarbons ND 50 ug/1 <br /> Benzene ND 0.50 " <br /> Toluene ND 0.50 <br /> Ethylbenzene ND 0.50 _ <br /> Xylenes(total) ND 0.50 <br /> Surrogate:g4a-Trifluorotoluene 33.1 30.0 110 70-130 <br /> LCS(OL04001-BSI) Prepared&Analyzed:04-Dec-00 <br /> Benzene 18.6 0.50 ug/l 20.0 93.0 70-130 <br /> Toluene 19.3 0.50 20.0 96.5 70-130 <br /> Ethylbenzene 20.4 0.50 20.0 102 70-130 r �! <br /> Xylenes(total) 61.1 0.50 60.0 102 70-130 <br /> Surrogate:a,a,a-Trifluorotoluene 29.2 30.0 97.3 70-130 <br /> Matrix Spike(OL04001-MSI) Source:W011540-04 Prepared&Analyzed:04-Dec-00 <br /> Benzene 19.0 0.50 ug/l 20.0 ND 95.0 70-130 <br /> Toluene -19.8 0.50 .-.120.0 ND 99.0 70-130 <br /> Ethylbenzene 20.5 0.50 20.0 ND 103 70-130 <br /> Xylenes(total) 62.1 0.50 60.0 ND 103 70-130 <br /> Surrogate:a,a,a•Trii luorotoluene 30.3 30.0 101 70-130 <br /> Matrix Spike Dup(OL04001-MSDI) Source:W011540-04 Prepared&Analyzed:04-Dec-00 <br /> Benzene 18.5 0.50 ug/l 20.0 ND 92.5 70-130 2.67 20 " <br /> Toluene 19.2 0.50 - 20.0 ND 96.0 70-130 3.08 20 <br /> Ethylbenzene 19.6 .0.50 20.0 ND 98.0 70-130 4.49 20 <br /> Xylenes(total) 59.7 0.50 60.0 ND 99.5 70-130 3.94 20 <br /> Surrogate:qa,a-Tris luorotoluene 30.2 30.0 101 70-130 <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 4 of 6 <br />