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404 N Wiget Lane <br /> Sequoia Walnut Creek C94598 <br /> ' (925)988 8-9600 <br /> 1 4 FAX(925)988-9673 <br /> I„-I)- Analytical www sequolalabs corn <br /> go <br /> Gettler Ryan,Inc -Dublin Project Tosco <br /> 6747 Sierra Court Suite J Project Number Tosco#11192,Stockton Reported <br /> Dublin CA,94568 Project Manager Doug Lee 09-Jan-01 18 05 <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 ' Lmmuts RPD Lunnt Notes <br /> Batch OL27013-EPA 5030B [PPI'] <br /> Matnx Spike(OL27013-MSI) Source W012445-05 Prepared&Analyzed 27-Dec-00 <br /> Methyl tert butyl ether 519 40 ug/1 500 , 90 858 60-150 <br /> Surrogate Dibromofluoromerhane 500 500 100 50-150 <br /> Surrogate 1,2-Drchloroethane-d4 430 500 860 50-150 <br /> Matnz Spike Dup(OL27013-MSD1) Source W012445-05 Prepared&Analyzed 27-Dec-00 <br /> Methyl twt-hutyl ether 580 40 ug/l 500 90 990 60.150 111 25 <br /> Surrogate DibromoJluoromethane 500 500 100 -50.150 <br /> Surrogate 1,2-Dtchloroetl ane-d4 t 440 500 88.0 50.150 <br /> ' { L <br /> I <br /> Sequoia Analytical-Waklut Creek The results in ibis report apply to the samples analyred rn accordance with the chain o <br /> custody document This analytical report must be reproduced m its enti <br /> Page 7 of 8 <br />