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404 N Wlget Lane <br /> Sequoia Walnut Creek CA 94598 <br /> (925)9W9600 <br /> fAX(925)988-9673 <br /> a- 0 Analytical www sequolalabscom <br /> er Ryan,Inc -Dublin Project Chevron <br /> 6747 Sierra Court Suite J Project Number Chevron#9-3232 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 07-Jul-00 08 15 <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 Lunit Units Level Result %REC Lutists RPD Luiut Notes <br /> Batch 0003001 -EPA 5030B [PIT] <br /> Blank(OG03001-BLKI) Prepared&Analyzed 03-Jul-00 <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 tert-butyl ether ND 2 5 " <br /> Surrogate g q a-Tnfluorotoluene 283 300 943 70-130 <br /> LCS(OG03001-BSI) Prepared&Analyzed 03-Jul-00 <br /> Benzene 166 050 ug/1 200 83 0 70-130 <br /> Toluene 182 050 200 91 0 70-130 <br /> Ethylbenzene 210 050 200 105 70-130 <br /> XAMbi(total) 60 0 050 600 100 70-130 <br /> Su gate aa•a-Trrfluorotoluene 263 300 877 70-130 <br /> Matrix Spike(0003001-MS1) Source W006567-02 Prepared&Analyzed 03-Jul-00 <br /> Benzene 174 050 ug/1 200 ND 870 70-130 <br /> Toluene 188 050 200 ND 940 70-130 <br /> Ethytbenzene 220 050 200 ND 110 70-130 <br /> Xylenes(total) 616 050 600 ND 103 70-130 <br /> Surrogate aaa.Tnfluorotoluem 165 300 88.3 70130 <br /> Matrix Spike Dup(OG03001-MSDI) Source W006567-02 Prepared&Analyzed 03-Jul-00 <br /> Semen 164 050 ugft 200 ND 82 0 70-130 592 20 <br /> Toluene 181 050 200 ND 905 70-130 379 20 <br /> Ethylbenzene 197 050 200 ND 985 70-130 Ito 20 <br /> Xylenes(total) 592 050 600 ND 987 70-130 397 20 <br /> Surrogate Aga-Tnfluorotohtene 2S5 300 850 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 enhrety <br /> Page 4 of 6 <br />