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Gettler-Ryan/Geostrategies(1) Project Tosco(1) <br /> 6747 Sierra Court,Suite J Prject Number Tosco(Unocal)SS#6981 1 <br /> Dublin CA,94568 Project Mager Deanna Harding 03/222/012/01 113 29 <br /> Manager <br /> Volatile Organic 8 Oxyganated Compounds by EPA Method 8260B -Quality Control <br /> Sequoia Analytical- San Carlos <br /> Reporting Spike source °� RPD <br /> p�yu Result limit Umts level Result %REC limits RPD limit Notes <br /> Batch 1030035-EPA 5030E [PIT] <br /> Blank(1030035-BLK1) Prepared&Analyzed 03/09/01 <br /> Ethanol ND 1000 ug/l <br /> 1,2-Dibromouthane ND 200 " <br /> 1,2-Dachlomethane ND 200 " <br /> Di-isopropyl ether ND 200 " <br /> Ethyl telt-butyl ether ND 200 " <br /> Methyl tert-butyl ether ND 200 " <br /> Tart-amyl methyl ether ND 200 " <br /> Tert-butyl alcohol ND 100 " <br /> Surrogate 1,2-Dichloroethane-d4 544 500 109 76-114 <br /> Surrogate Toluene-d8 501 500 100 88-110 <br /> (1030035-BLK2) Prepared&Analyzed 03/14/01 <br /> E of ND 1000 u911 <br /> 1,2-Dibromoethane ND 200 " <br /> 1,2-Ihchlottidliaae <br /> ND 200 " <br /> Di-isopropyl ether ND 200 " <br /> Ethyl tert-butyl ether ND 200 " <br /> Methyl tertbutyl ether ND 200 " <br /> Tert-amyl methyl ether ND 200 " <br /> Tortbutyl alcohol ND 100 " <br /> Surrogate 1,2-Dichloroethane-d4 478 w 500 956 76-114 <br /> Surrogate Toluene-d8 496 500 992 88-110 <br /> LCS(1030035-BSI) Prepared&Analyzed 03/09/01 <br /> Methyl tett-butyl ether 526 200 ugll Soo 105 70-130 <br /> Surrogate 11-Dichloroethane-d4 523 500 105 76-114 <br /> Surrogate Toluene-d8 494 " Soo 988 88-110 <br /> Ot 1 Analytical-San Carlos 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 entirety <br /> Page 22 of 25 <br />