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Sequoia88s°'arv5 <br /> Markin hill,CA 95403737 <br /> CD (408)776 9600 <br /> qW Analytical FAX(408)782-6308 <br /> www sequoialabs c <br /> Secor-Rancho Cordova Protect ARCO#595, Stockton,CA MMA0549 <br /> 3017 Kilgore Rd Suite 100 Project Number ARCO#595, Stockton,CA Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 02/25/03 10 42 <br /> Volatile organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical_- Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3A28030-EPA 5030E PIT <br /> Blank(3A28030-BLK1) Prepared 01/28/03 Analyzed 01/29/03 <br /> Ethanol ND 40 ug/l <br /> tert-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 /> 1,2-Dibromoethane(EDB) ND 050 " <br /> Surrogate 12-Dichloroethane-d4 490 500 980 78-129 <br /> Laboratory Control Sample(3A28030-BSI) •- Prepared 01/28/03 Analyzed 01/29/03 <br /> Methyl cert-butyl ether 476 050 ug/l 500 95 2 63-137 <br /> SO;ogate 1 2-Dtchloroethane-d4 4 75 .500 95 0 78-129 <br /> Laboratory Control Sample Dup(3A28030-BSD1) Prepared 01/28/03 Analyzed 01/29/03 <br /> Methyl tort-butyl ether _ -~ 4 79 050 ug/l 500 95 8 63-137 0 628 13 <br /> Surrogate 12-Dtchloroethane-d4 486 500 972 78-129 <br /> Batch 3A31008-EPA 5030B P/T <br /> Blank(3A31008-BLKI) Prepared&Analyzed 01/31/03 <br /> Ettianol ND wu ugr i <br /> tert-Butyl alcohol ND 10 " <br /> Methyl tert-butyl ether ND 050 " <br /> -Di-isopropyl ether ND 050 " <br /> Ethyl tent-butyl ether ND 050 " <br /> tert-Amyl methyl ether ND 050 " <br />--- - 1,2-Dtchloroethane --- - - - - - -ND - - -050 - - '�-- - — ----- -- -- - — ---- — -------- - � - -- - <br /> 1,2-Dibromoethane(EDB) ND 050 " <br /> Surrogate 1 2-Dichloroethane-d4 543 500 109 78-129 <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stated,results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> 20 of 22 <br />