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Sequoia �'� 404 N.,CA Lane <br /> ' Walnut Geek,CA 94598 <br /> (925)988-9600 <br /> ID Analytical FAX(925)9abs.co 3 <br /> www.sequo(alabs.com <br /> Gettler Ryan,lnc.-Dublin Project: Tosco <br /> 6747 Sierra Court Suite J Project Number: Tosco# 11192 Reported: <br /> Dublin CA,94568 Project Manager: Doug Lee 19-Dec-00 17:43 <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 OL09001-EPA 5030B[P/T] <br /> Blank(OL09001-BLK1) Prepared&Analyzed:09-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 /> Methyl tert-butyl ether ND 2.5 <br /> Surrogate:aa,a-Trifluorotoluene 30.7 30.0 102 70-130 <br /> LCS(OL09001-BSI) Prepared&Analyzed:09-Dec-00 <br /> Benzene 18.1 0.50 ug/1 20.0 90.5 70-130 <br /> Toluene 18.9 0.50 20.0 94.5 70-130 <br /> Ethylbenzene 19.7 0.50 20.0 98.5 70-130 <br /> Xylenes(total) 59.8 0.50 60.0 99.7 70-130 <br /> Surrogate:a a a-Trifluorotoluene 29.8 30.0 99.3 70-130 <br /> Matrix Spike(OL09001-MSI) Source:W012073-09 Prepared&Analyzed:09-Dec-00 <br /> Benzene 16.7 0.50 ug/1 20.0 ND 83.5 70-130 <br /> Toluene 17.4 0.50 20.0 ND 87.0 70-130 <br /> Ethylbenzene 18.1 0.50 20.0 ND 90.5 70-130 <br /> Xylenes(total) 55.3 0.50 60.0 ND 92.2 70-130 <br /> Surrogate:gaa-Trifluorotoluene 29.7 30.0 99.0 70-130 <br /> Matrix Spike Dup(OL09001-MSDI) Source:W012073-09 Prepared&Analyzed:09-Dec-00 <br /> Benzene 16.3 0.50 ug/1 20.0 ND 81.5 70-130 2.42 20 <br /> Toluene 17.1 0.50 20.0 ND 85.5 70-130 1.74 20 <br /> Ethylbenzene 17.8 0.50 20.0 ND 89.0 70-130 1.67 20 <br /> Xylenes(total) 54.4 0.50 60.0 ND 90.7 70-130 1.64 20 <br /> Surrogate:gaga-TriJluorotoluene 29.4 30.0 98.0 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 4of6 <br />