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Wlget Lane <br /> S4equoia 4oa N <br /> Walnut Creek.CA 94598 <br /> a- ) {925}988-9600 <br /> Analytical FAX <br /> (92S)968-9673 <br /> www sequoiala66 corn <br /> ,Fff <br /> Gettler Ryan,Inc -Dublin Project Chevron <br /> 6747 Sierra Court Suite J Project Number Chevron 49-6258 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 26-Jan-01 12 35 <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 Lunt Uruts Level Result %REC Limits RPD Lunn Notes <br /> Batch 1A12002-EPA 5030B[PIT] <br /> Blank(1A12002-DTXI) Prepared&Analyzed 12-Jan-01 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tent--butyl ether ND 2 5 " <br /> I <br /> Surrogate %aa-Trnfluorotoluene 3&2 300 127 70.130 <br /> LCS(1A12002-BSI) Prepared&Analyzed 12-Jan-01 <br /> Benzene 180 050 ug/l 200 900 70-130 <br /> Toluene 181 050 200 905 70-130 <br /> WZ) <br /> 180 050 200 900 70-130 <br /> 536 050 600 893 70-130 <br /> Surrogate qqa-Tnfluorotoluene 2&9 300 963 70-130 <br /> Matrix Spire(1A12002-MS1) Source W 101032-04 Prepared&Analyzed 12-Jan-01 <br /> Benzene 174 050 ug11 200 ND 870 70-130 <br /> Toluene 178 050 200 ND 890 70-130 <br /> Ethylbenzene 176 050 200 ND 880 70-130 <br /> Xylenes(total) 527 050 600 ND 878 70-130 <br /> Surrogate qct a-Trcfluorotoluene 283 300 943 70-130 <br /> Matra Spike Dup(lA12002-MSD1) Source W101032-04 Prepared&Analyzed 12-Jan-Ol <br /> Benzene 194 0 50 ugfl 200 ND 970 70-130 109 20 <br /> Toluene 196 0 50 200 ND 980 70-130 9 63 20 <br /> Ethylbenzene 193 050 200 ND 965 70-130 921 20 <br /> Xylenes(total) 567 050 600 ND 945 70-130 731 20 <br /> Surrogate a a a-Tnfluorotoluene 319 300 106 70-130 <br /> Sla Analytical-Walnut Creek The results to tits report apply to the samples analyzed to accordance with the chain of <br /> custody document.Tins analytical repots must be reproduced to its entirety <br /> Page 6 of 10 <br /> i <br />