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Sequoia BeS'eN�3Dr <br /> 7 <br /> a— ) (409) <br /> MorganHtU,CA95037AnalyticalFAX 7' -9608 <br /> (408)7822-6308 <br /> www s2quoialabs con <br /> Stratus Erivironmental Inc Project ARCO#2130 MMCO267 <br /> 3330 Cameron Park Dr,Suite 550 Project Number ARCO#2130,Stockton,CA Reported <br /> Cameron Park CA,95682 Project Manager Jay Johnson 03/28/03 08 08 <br /> Volatile Organic Compounds by EPA Method 8260B- Quahty 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 3C19021-EPA 5030B PIT <br /> Blank(3C19021-BLKI) Prepared&Analyzed 03/19/03 <br /> Ethanol ND 100 U84 <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 /> ten-Amyl methyl ether ND 050 " <br /> 1,2-Dichloroethane ND 050 " <br /> 1,2-Dibromoethane(EDB) ND 050 " <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 0 50 " <br /> �asoline Range Organics(C6-C10) ND 50 " <br /> Surrogate 12-Dichloroethane-d4 546 500 109 78-129 <br /> Laboratory Control Sample 3C19021-BSI) Pre aced 03/19/03 Anal zed 03/20/03 <br /> Methyl tort-butyl ether 960 0 50 USA 100 960 63.137 <br /> Benzene 9 86 050 100 99 6 78-124 <br /> Toluene 9 37 050 10 0 93 7 78-129 <br /> Surrogate 1 2-Dichloroethane-d4 320 300 104 78-129 <br /> Laboratory Control Same3( C19021-BS2) _ Prepared 03/19/03 Analyzed 03/20/03 <br /> Methyl tert-butyl ether 8 62 050 USA 904 95 4 63-137 <br /> Benzene 5 55 050 5 44 102 78-124 <br /> Toluene 31 7 050 32 8 966 78-129 <br /> Gasoline Range Organics(C6-C 10) 355 50 440 807 70-113 <br /> Surrogate 1 2-Dichloroethane-d4 527 5 00 105 78-129 <br /> Sequoia Analytical-Morgan Hill 77ie 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 20 <br />