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V <br /> Sequoia 885 Jams Dr <br /> q Morgan Hill,CA 95037 <br /> Analytical (408)7769600 <br /> FAX(408)782-6308 <br /> 7sz.s3os <br /> www s uotalabs om <br /> Stratus Environmental 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 3C20003-EPA 50308 PIT <br /> Blank(3C20003-BLK1) Prepared&Analyzed 03/20/03 <br /> Methyl tert-butyl ether ND 050 ug/1 ^^T^ — <br /> Di-isopropyl ether ND 050 " <br /> Ethyl tent-butyl ether ND 050 " <br /> tert-Amyl methyl ether ND 050 " <br /> 1,2-Dichloroethane ND 050 " <br /> 1,2-Dibromoethaue(EDB) ND 050 " <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbeazene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Gasoline Range Organics(C6-CLO) ND 50 " <br /> arrogate 1 2-Dichloroethane-d4 454 " 500 908 78-129 <br /> Laboratory Control Sample(3C20003-BSI) Prepared&Analyzed 03/20/03 <br /> Methyl tort-butyl ether 975 050 ug/l 10 0 975 63-137 <br /> Benzene 100 0 50 100 100 78-124 <br /> Toluene 9 25 0 50 100 92 5 78-129 <br /> Surrogate 1,2-Dichloroethane-d4 4 65 500 930 78-129 <br /> Laboratory Control Sample(3C20003-BS2) Prepared&Analyzed 03/20/03 <br /> Methyl tert-butyl ether 8 03 050 ugll 9 04 888 63-137 <br /> Benzene 5 06 050 544 910 78-124 <br /> Toluene 272 050 128 829 78-129 <br /> Gasoline Range Organics(C6-C10) 444 50 " 440 101 70-113 <br /> Surrogate 1 2-Dichloroethane-d4 443 500 890 78-129 <br /> Matrix Spike(3C20003-MSI) - Source N MCO295-01 Prepared&Analyzed 03/20/03 <br /> Methyl tart-butyl ether 469 25 u&4 452 430 84 1 63-137 <br /> Benzene 326 2 5 " 272 6 1 974 78-124 <br /> Toluene 145 2 5 164 070 88 0 78-129 <br /> Gasoline Range Organics(C6-CID) 2470 250 2200 480 90 5 70-113 <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 staled results are reported on a wet weight <br /> basis This analytical report must be reproduced in its entirety <br /> 18 of 20 <br />