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885 <br /> JarvisC 5037 <br /> ' Sequoia Morgan Hill CA 95037 <br /> (408)776-9600 <br /> � ► A <br /> FAX(408) 308 <br /> Analytical <br /> www sequotalabsbs cpip <br /> • <br /> Secor-Rancho Cordova(ARCO) Project ARCO#4932, Stockton, CA MNG0371 <br /> 3017 Kilgore Rd Suite 100 Project Number 63964 Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 08/03/04 16 21 <br /> Volatile Organic Compounds by EPA Method 8260B - QuaIlty 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 4G22001 -EPA 5030B PIT <br /> Blank(4G22001-BLKI) Prepared&Analyzed 07/22/04 <br /> tert-Amyl methyl ether ND 050 ugll <br /> Benzene ND 050 " <br /> tert-Butyl alcohol ND 20 " <br /> Di-isopropyl ether ND 050 " <br /> 1,2-Dibromoethane(EDB) ND 050 " <br /> 1 2-Dichloroethane ND 050 " <br /> Ethanol ND 100 IC <br /> Ethyl tert-butyl ether ND 050 " <br /> Ethylbenzene ND 050 " <br /> Methyl tert-butyl ether ND 050 " <br /> Toluene ND 0 50 " <br /> Xylenes(total) ND 050 • <br /> Gasoline Range Organics(C4-C 12) ND 50 <br /> Surrogate 1,1-Dichloroethane-d4 118 250 91 78-119 <br /> Laboratory Control Sample(4G22001-BSI) Prepared&Analyzed 07/22/04 <br /> tert-Amyl methyl ether 103 050 ug/t 100 103 56-140 <br /> Benzene 984 050 too 98 78-124 <br /> tert-Butyl alcohol 75 6 20 500 151 0-206 <br /> Di-isopropyl ether 102 050 100 102 76-130 <br /> 1,2-Dibromoethane(EDB) 101 050 100 101 77-132 <br /> 1,2-Dichloroethane 102 050 10 0 102 77-136 <br /> Ethanol 382 100 200 191 31-186 IC,HL <br /> Ethyl tert-butyl ether 100 050 10 0 100 61-141 <br /> Ethylbenzene 10 2 050 10 0 102 84-117 <br /> Methyl tert-butyl ether 8 88 050 10 0 89 63-137 <br /> Toluene 9 86 050 10 0 99 78-129 <br /> Xylenes(total) 313 050 300 104 83-125 <br /> Surrogate 11-Dichloroethane-d4 219 150 88 78-119 <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 /> Page 17 of 24 <br />