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f f <br /> Sequoia 404 N WiLane <br /> Walnut Creek CAA 94598 <br /> (925)988-9600, <br /> FAX(925)988`-9#73 <br /> 44DAnalytical ' <br /> - www sequolalatis da <br /> Gettler 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 13-Jun-01 09 07 <br /> Volatile Organic Compounds by EPA Method 8260B - 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 1E30011-EPA 5030B (PIT) <br /> Blank(IE30011-BLKI) Prepared&Analyzed 30-May-01 <br /> Ethanol ND 500 ug/l <br /> tent-Butyl alcohol ND 20 " <br /> Methyl tert-butyl ether ND 20 " <br /> Di-isopropyl ether ND 20 " <br /> Ethyl tert-butyl ether ND 20 " <br /> tert-Amyl methyl ether ND 20 <br /> Surrogate Dibromolluoromethane 510 500 104 50-150 <br /> Surrogate 12-Dichloroethane-d4 570 500 114 50-150 <br /> Blank(1E30011-BLK2) Prepared&Analyzed 05-Jun-01 <br /> Ethanol ND _500 ug/I <br /> tert-Butyl alcohol ND 20 <br /> Methyl ter%-butvl ether ND 20 " <br /> Di-isopropyl ether ND 20 W <br /> Ethyl tert-butyl ether ND 20 <br /> tent-Amyl methyl ether ND 20 " <br /> Surrogate DibroingJ7uoromeihane 270 250 108 50-150 <br /> Surrogate 1 2-Drchloroethane-d4 240 250 960 50-150 <br /> Blank(1E34Di1-BLK3) T� l T Prepared&Analyzed 07-Jun-01 <br />— - -Ethanol-- ND— _ _500 --ug/1 -- <br /> tert-Butyl alcohol ND 20 " <br /> Methyl tert-butyl ether ND 20 <br /> Di-isopropyl ether ND 20 " <br /> Ethyl tert-butyl ether ND 20 " <br />- tert-Amyl methyl ether ' ND 20 " <br /> Surrogate DibromoJluoroinethane 260 250 104 50-150 <br /> Surrogate 1 2-Dichloroelhane-d4 240 250 960 50-150 <br /> Sequoia Analytical -Walnut Creek The results in this report apply to the samples analyzed in accordance with the ch <br /> custody document This analytical report must be reproduced in its ent <br /> Page 7 of 10 <br />