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_ 404 N Wiget Lane_ <br /> Sequoia Walnut Creek C94598 <br /> (925)458 8-9600 <br /> FAX(925)988%73 <br /> *6-0— Analytical www sequoialabs com <br /> Gettler Ryan,Inc -Dublin Project Chevron <br /> 6747 Sierra Court Suite 7 Project Number Chevron fi 9-1848 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 27-Jul-01 10 26 <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 1 G20001 -EPA 50308 PIT <br /> Blank(1G20001-BLK1) Prepared&Analyzed 20-Jul-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 tert-butyl ether ND 25 " <br /> Surrogate a a a-Trtuorotoluene 292 300 973 70-130 <br /> Blank(1G20001-BLK2) Prepared&Analyzed 22-Jul-01 <br /> Pnrgeable Hydrocarbons ND 50 ug/1 <br /> Benzene ND 050 " <br /> Toluene ND 050 <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 25 " <br /> Surrogate a a a-Triuorololuene 310 300 103 70-130 <br /> Blank(1G20001-BLK3) Prepared&Analyzed 23-Jul-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 tert-butyl ether ND 25 " <br /> Surrogate aa a-Triuorotoluene 286 300 953 70-130 <br /> Blank(1G20001-BLK4) Prepared&Analyzed 26-Ju"l <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 25 " <br /> Surrogate a a a-Triuorotoluene 256 300 853 70-130 <br /> Sequoia Analytical-Walnut Creek The results in this report apply to the samples analyzed in accordance with the c <br /> custody document This analytical report must be reproduced m us e <br /> Page 5 of 9 <br />