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w ' <br /> '"'Y1 • 885 larvas Drive037 <br /> � Sequoia Morgan HJl CA 95037 <br /> • Analytical (408)782 6300 <br /> FAX(468)782 6308 <br /> www sequoialabs corn <br /> Sector-Rancho Cordova(ARCO) Project ARCO#0595,Stockton,CA MNA0270 <br /> 3017 Kilgore Rd Suite 100 Project Number 38983 Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 01/26/04 14 13 <br /> Volatile Organic Compounds by EPA Method 8260B-Quality Control <br /> Sequoia Analytical- Morgan Hill <br /> Reporting Spike So=e %REC RPD <br /> Analyte Result Limit Units Level Result %REG Limits RPD Limit Notes <br /> Batch 4A20011-EPA 5030E PIT <br /> Matrix Spike Du (4A20011-MSD1) Source MNA0128-01 Prepared&Analyzed 01/20/04 <br /> Surrogate 12-Dichloroethane-d4 5 13 ugll 500 103 78-129 <br /> Batch 4A21003-EPA 5030B PIT <br /> Blank(4A21003-BLKI) Prepared&Analyzed 0.1/21/04 _ <br /> Ethanol ND 100 ug/l <br /> tert-Butyl alcohol ND 20 " <br /> Methyl tent-butyl ether ND 050 <br /> Di-isopropyl ether ND 050 " <br /> Ethyl tert-butyl ether ND 050 " <br /> tent-Amyl methyl ether ND 050 " <br /> 1,2-Dichloroethane ND 050 <br /> 1,2-Dibromoethane(EDB) ND 050 <br /> Benzene ND 0 50 <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 0 50 " <br /> Gasoline Range Organics ND 50 " <br /> Surrogate 12-Dichloroethane-d4 5 05 3 00 101 78-129 <br /> Laboratory Control Sample(4A2I003-BSI) Prepared&Analyzed 01/21/04 _ <br /> Ethanol 165 100 ugll 200 82 5 31-143 <br /> i <br /> tert-Butyl alcohol 546 20 500 109 56-131 <br /> Methyl tert-butyl ether 1 1 1 050 10 0 111 63-137 <br /> Di-isopropyl ether 11 5 050 10 0 115 76-130 <br /> Ethyl tert-butyl ether 11 8 0 50 100 118 81-121 <br /> Cert-Amyl methyl ether 10 7 0 50 100 107 82-140 <br /> 1,2-Dichloroethane 11 5 0 50 100 115 77-136 <br /> 1,2-Dibromoethane(EDB) 12 3 0 50 100 123 77-132 <br /> Benzene 10 9 050 100 109 69-124 <br /> Toluene 10 7 0 50 10 0 107 78-129 <br /> Ethylbenzene 11 6 0 50 10 0 116 84-132 <br /> Xylenes(total) 344 0 50 30 0 115 83-137 <br /> Surrogate 11-Dichloroethane-d4 509 500 102 78-129 <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain <br /> ojcustody document Unless otherwise stated results are reported on a wet weight <br /> basis This analytical report must be reproduced in its entirety <br /> Page 15 of 18 <br />