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SequoiaWalnu404 ECLane <br /> Walnut Creek, CAA 94598 j <br /> (925) 988-9600 j <br /> Analytical FAX(425) 988-9673 <br /> JGettler Ryan,Inc,-Dublin Project: Unocal <br /> 7 Sierra Court Suite] Project Number: Unocal#0788 Reported: <br /> J7 <br /> CA,94568 Project Manager: Deanna L.Harding 05-Dec-99 09:44 <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 9K13002: Prepared 13-Nov-99 Using EPA 5030B [P/TJ <br /> Blank(9K13002-BLKI) <br /> Purgeable Hydrocarbons ND 50 ug/l <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 /> Surragale:qa,a-Triiluorotoluene 33.8 30.0 113 70430 <br /> LCS(9K13002-BSI) <br /> Benzene 19.6 0.50 ug/l 20.0 98.0 70-130 <br /> Toluene 19.9 0.50 20.0 99.5 70-130 <br /> ELhylbenzene 20.5 0.50 20.0 103 70.130 <br /> Xylenes(total) 62.5 0.50 60.0 104 70.130 <br /> Wale:qa,a-Tris luorotolueue 29.6 30.0 98.7 70-130 <br /> Matrix Spike (9K13002-MSI) Source:W911316-37 <br /> Benzene 22.7 0.50 ug/l 20.0 ND 114 70.130 <br /> Toluene 22.7 0.50 20.0 ND 114 70-130 <br /> EthAbenzene 23.1 0.50 20.0 ND 116 70-130 <br /> Xylenes(total) 71.4 0.50 60.0 ND 119 70-130 <br /> Surrogate:a,c�a-Tr�fluorololueue 19.0 " 30.0 96.7 70.130 <br /> Matrix Spike Dup (9K13002-MSDI) Source: W911316-37 <br /> Benzene 23.8 0.50 ugli 20.0 ND 119 70-130 4.73 20 <br /> Toluene 23.7 0.50 20.0 ND 119 70-130 4.31 20 <br /> Ethylbenzene 24.1 0.50 24.0 ND 121 70-130 4.24 20 <br /> Xylenes(total) 73.5 0.50 60.0 ND 123 70-130 2.90 20 <br /> Surrogate:qa,a-Trifluorololueue 30.1 30.0 101 70-130 <br /> Sequoia Analytical-Walnut Creek The resulrs in lids report apply w the samplesana47ed in accordance with the chain of <br /> custody document.This analytical report must be reproducedin its entirety. <br /> rV anne Fegley, Project Manager Page 6 or 8 <br />