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r <br /> 404 N Wiget Lane <br /> Sequoia Walnut Geek CA 94598 <br /> 4 4D— (925)988-9600 <br /> Analytical FAXequoalabsc m <br /> www sequoialabs cam <br /> Gettter Ryan,Inc -Dublin Project Chevron <br /> 6747 Sierra Court Suite J Project Number Chevron#9-6258 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 27-Jul-01 10 47 <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 G12001 -EPA 5030B PIT <br /> Blank(IG12001-BLKI) Prepared&Analyzed 12-Jul-01 <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 050 " <br /> Methyl tert-butyl ether ND 2 5 " <br /> Surrogate aaa-Triuorotoluene 78 0 300 933 70-130 <br /> Blank(IG12001-BLK2) Prepared&Analyzed 16-Jul-01 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 0 50 " <br /> VVC ND 0 50 „ <br /> enzene ND 0 50 <br /> Xylenes(total) ND 050 " <br /> Methyl tent-butyl ether ND 2 5 " <br /> Surrogate a a a-Trr luorololuene 33 4 300 111 70-130 <br /> Blank(1G12001-BLK3) Prepared&Analyzed 17-Jul-01 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 0 50 " <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 0 50 " <br /> Methyl tert-butyl ether ND 25 " <br /> Surrogate a a a-Triuorololuene 302 300 101 70-130 <br /> Blank(IG12001-BLK4) Prepared&Analyzed 18-Jul-01 <br /> Purgeable Hydrocarbons ND 50 ugll <br /> Benzene ND 0 50 " <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 2 5 " <br /> Surrogate a a a-Trifluorotoluene 252 300 840 70-130 <br /> ota Analytical- Walnut Creek The results to 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 6 of 12 <br />