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1 <br /> •1 885 Tarns <br /> Sequoia Morgan Hill,GA 4503737 <br /> a— ) <br /> (408)776-9600 <br /> Analytical FAX(408)782-6308 <br /> WWW sequoialabs torr <br /> Stratus Environmental Inc Project ARCO#2186,Stockton,CA MMC0508 <br /> 3330 Cameron Park Dr,Suite 550 Protect Number ARCO 92186,Stockton,CA Reported <br /> Cameron Park CA,95682 Project Manager Jay Johnson 03/27/03 17 13 <br /> Volatile Orgamc Compounds by EPA Method 8260B- Quality Control <br /> Sequoia Analytical-Morgan Hill <br /> Reporting Spike Source %REC RFD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3C22003-EPA 5030E PIT <br /> Blank(3C22003-BLK1) Prepared&Analyzed 03/22/03 _ <br /> tert-Butyl alcohol ND 20 ug/l <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 1 2-Dichloroethane-4`4 475 500 950 78-119 <br /> Laboratory Control Sample(3C22003-BSI) Prepared&Analyzed 03/22/03 <br /> Methyl tert-butyl ether 930 0 50 ugh 100 930 63-137 <br /> Am <br /> Surrogate 12-Dxchloroethane-d4 465 500 9.3 0 78-129 � <br /> Laboratory Control Sample(3C22003-BS2) Prepared&Analyzed 03/22/03 <br /> Methyl tert-butyl ether 843 050 U94 904 93 3 63-137 <br /> Surrogate 1 2-Dxchloroethane-d4 468 _p,J 500 936 78-129 <br /> "�VW—iia <br /> Matrix Spike(3C22003-MSI) Source MMC0508-08 Prepared&Analyzed 03/22/03 <br /> Methyl tert-butyl ether 2840 50 ug/i 904 2400 487 63-137 QM-07 <br /> Surrogate 12-Dichloroethane-d4 458 500 91 6 78-129 <br /> Matrix Spike Dup(3022003-MSDI) --- _ Source NIMC0508-08 Prepared&Analyzed 03/22/03 <br /> Methyl tert-butyl ether 2920 50 ugfl 904 2400 575 63-137 278 13 QM-07 <br /> Surrogate 1,2-Dichloroethane-d4 4 74 500 948 78-129 <br /> Batch 3C22018-EPA 5030E P/T <br /> Blank 3022018-BLKI Prepared 03/22/03 Analyzed 03/23/03 <br /> Ethanol ND 100 u8A <br /> tert-Butyl alcohol ND 20 " <br /> .Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document Unless otherwise stated results are reported on a wet weight <br /> basis This analytical report must be reproduced in its entirety <br /> 15 of 17 <br />