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885 Jarvis 4D Drive <br /> Sequoia Morgan Bal,CA 95037sa37 <br /> mW Anal tical (408)772- 08 <br /> 96 <br /> Y FAX(408)782-6308 <br /> www se uoialabs con <br /> =Gat1way <br /> Project ARCO#6020,Manteca,CA <br /> 12870te 300 Project Number ARCO#6020,Manteca,CAReported <br /> Project Manager Vem Elarth 10/24/02 11 03 <br /> Volatile Organic Compounds by EPA Method 8260B- Quality Control <br /> Sequoia Analytical -Morgan Hill <br /> Reporting Spike Source %REC RPV <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Motes <br /> Batch 2JO7017-EPA 50308 P/T <br /> Blank(2J07017-BLKI) _ Prepared&Analyzed 10/07/02 _ <br /> Ethanol ND 40 ug/l <br /> tent-Butyl alcohol ND 20 " <br /> Methyl tert-butyl ether ND 050 " <br /> DI-isopropyl ether ND 050 " <br /> Ethyl tert-butyl ether ND 050 " <br /> tert-Amyl methyl ether ND 050 " <br /> 1,2-Dichloroethane ND 050 " <br /> Ethylene dibromide ND 050 " <br /> Surrogate 1 2-Dichloroethane-d4 525 500 105 78-129 <br /> LCS(2J07017-BSI) Prepared&Analyzed 10/07/02 <br /> Methyl tert-butyl ether 10 2 0 50 u9/1 100 102 63-137 <br /> Surrogate 1 2-Dtchloroethane-d4 5 14 500 103 78-129 <br /> Aak CS Du (2J07017_BSD1) Prepared&Analyzed 10/07/02 _ <br /> Methyl tert-butyl ether 104 050 ug/I 100 104 63-137 1 94 13 <br /> Surrogate 12-Dichloroethane-d4 511 500 102 78-129 <br /> Batch 2JO7043-EPA 5030B PIT <br /> Blank 2J07043-BLKI Prepared 10/07/02 Anal zed I0/08/02 <br /> Ethanol ND 40 ug/l <br /> tert-Butyl alcohol ND 20 " <br /> Metbyl tent-butyl ether ND 050 " <br /> DI-isopropyl ether ND 050 " <br /> Ethyl tert-butyl ether ND 050 " <br /> tert-Amyl methyl ether ND 050 " <br /> 1,2-Dichloroethane ND 050 " <br /> Ethylene dibromide ND 050 " <br /> Surrogate 1 2-Dichloroethane-d4 4 95 500 990 78-129 <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed to accordance with the chain <br /> . of custody document This analytical report must be reproduced in its entirety <br /> $ of 11 <br />