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Gettler-Ryan/Geostrategtes(l) Project Tosco(1) 16 <br /> -6747 Sierra Court;Suite 3Project Number-.Tosco#15886,Stockton,CA ----Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 05/25/01 16 59 <br /> Volatile Organic 8 Oxygenated Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical-San Carlos - <br /> Repoiung Spike Source %REC RPD <br /> Analyte - T = --_ - - -Result = - =unit--Units �i=level - - Result-- %REC---Lints -=RPD -Limit- - -=Notes— <br /> Batch 1050043-EPA 5030B PIT <br /> LCS(1050043-BSI) Prepared&Analyzed 05/11/01 <br /> Methyl tett-butyl ether 453 200 ug/1 500 906 70-130 <br /> Surrogate 1,1-Dichloroethane-d4 4S6 Soo 911 76-114 <br /> Surrogate Toluene-rib 07 500 994 88-110 <br /> Matrix Spike(1050043-MS1) Source L105073-01 Prepared&Analyzed 05/11/01 <br /> Methyl tert-butyl ether 568 200 119/1 500 125 886 60-140 <br /> Surrogate 11-Dichloroethane-d4 453 500 906 76-114 <br /> Surrogate Toluene-d8 514 500 103 88-110 <br /> Matrix Spike Dup(1050043-MSD1) Source:L105073-01 Prepared&Analyzed 05/11/01 <br /> Metbyl tert-butyl ether 604 200 u9/1 Soo 125 958 60-140 614 25 <br /> Surrogate 12-Dichloroethane-d4 454 " 500 908 76-114 <br /> Surrogate Toluene-d8 499 500 998 88-110 <br /> Batch 1050074-EPA 5030B /T <br /> Blank(1050074-BLK1) - T_ Prepared&Analyzed 05/17/01 <br /> Ethanol ND 1000 ug/l <br /> 1,2-Dibromoethane ND 200 " <br /> 1,2-Dichloroethane ND 200 " <br /> Di-tsopropyl ether ND 200 " <br /> Ethyl tert-butyl ether ND 200 " <br /> Methyl tertbutyl ether ND 200 „ <br /> Tat-amyl methyl ether ND 200 " <br /> Tert-butyl alcohol ND 100 " <br /> Surrogate 11-Dichloroethane-d4 449 " 500 898 76-114 <br /> Surrogate Toluene-d8 536 500 107 88-110 <br /> Sequoia Analytical-San Carlos The results in this report apply to the samples analyzed in accordance with the ch <br /> dWW <br /> custody document This analytical report must be reproduced in its entirety <br /> IPage 25 of 28 <br />