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Genler-Ryan/Geostzategies(l) Project Tosco(1) <br /> 6747 Stena Court;Suitet =Pno�ectNumber=Tosco#5886,Stockton,CA -__ -_- _ _ _-----Reported=- - — <br /> Dublin CA,9456$ Project Manages Unna Harding 05/25101 16 59 <br /> Volatile Organic 8 Oxygenated Compounds by EPA Method 8260B -Quality Control <br /> Sequoia Analytical- San Carlos <br /> Ropomng Spike Source Y.REC RPD <br /> - Level - Result -Y.REC Limits RPD Limit Notes <br /> Analyte Result Ljmit Units <br /> Batch 1050041-EPA 5030B [Pffl <br /> Blank(1050041-BLK1) Prepared&Analyzed 05/11/01 <br /> Ethanol ND 1000 ugll <br /> 1,2-Dibromoethane ND 200 " <br /> 1,2-Dichloroethane ND 200 " <br /> Di-isopropyl ether ND 2 00 " <br /> Ethyl tent-butyl ether ND 200 " <br /> Methyl tert-butyl ether ND 2 00 <br /> Tert-amyl methyl ether ND 2 00 <br /> Tertbutyl alcohol ND 100 " <br /> Surrogate 12-Dichloroethane-d4 45 7 500 914 76-114 <br /> Surrogate Toluene-& 531 50 0 106 88-110 <br /> Blank(1050041-BLK2) Prepared&Analyzed 05/15/01 <br /> Ethanol ND 1000 U911 <br /> 1,2-Dibromoethane ND 200 " <br /> 1,2-Dichloroethane ND 2 00 " <br /> Di-isopropyl ether ND 200 " <br /> Ethyl tertbutyl ether ND 200 " <br /> Methyl tert-butyl ether ND 2 00 " <br /> Tert-amyl methyl ether ND 200 " <br /> Tert-butyl alcohol ND 100 " <br /> Surrogate 12-Dichloroethane-d4 478 " 500 95 6 76-114 <br /> Surrogate Toluene-d8 529 500 106 88-110 <br /> LCS(1050041-BS1) Prepamd&Analyzed 05/11/01 <br /> Methyl tert-butyl ether 487 200 ug/l 500 974 <br /> 70-130 <br /> Surrogate 1,2-Dichloroethane-d4 490 500 98 0 76-114 <br /> Surrogate Toluene-d8 527 500 105 88-110 <br /> Sequoia Analytical-San Carlos The results in this report apply to the samples analyzed in accordance with the chain <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 23 of 28 <br />