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1)Ivc <br /> 4D- <br /> 8B5 JarvisSequoia Morgan Hill CA 950375037(408)776 9640 <br /> Analytical FAX(408)7826308 <br /> www sequolalabs cam <br /> Secor-Rancho Cordova(ARCO) Project ARCO#4932,Stockton,CA MOJ0547 <br /> 3017 Kilgore Rd Suite 100 Project Number GOC813-0001 Reported <br /> Rancho Cordova CA,95670 Project Manager Clinton Harms 10/20/05 12 56 <br /> Volatile Organic Compounds by EPA Method 8260B -Quality Control <br /> Sequoia Analytical - Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Unds Level Result %REC Limits RPD Limit Notes <br /> Batch 5JI5006-EPA 5030B PIT I EPA 8260E <br /> Blank(5J I 5006-BLKI) Prepared&Analyzed 10/15/05 <br /> tert-Amyl methyl ether ND 050 ug/I <br /> Benzene ND 050 <br /> tert-Butyl alcohol ND 20 " <br /> Di-isopropyl ether ND 050 " <br /> I 2-Dibromoethane(EDB) ND 050 " <br /> 1 2-Dichloroethane ND 050 " <br /> Ethanol ND 100 <br /> Ethyl tert butyl ether ND 0 50 <br /> Ethylbenzene ND 050 " <br /> Methyl ten-butyl ether ND 050 <br /> Toluene ND 050 <br /> Xylenes(total) ND 050 " <br /> Gasoline Range Organics(C4-C 12) ND 50 <br /> Surrogate I2-Dichloroethaned4 486 500 97 60-135 <br /> Laboratory Control Semple(5J15006-BSI) Prepared&Analyzed 10/15/05 <br /> tert-Amyl methyl ether 164 050 ug/l 15 0 109 80-115 <br /> Benzene 4 95 050 5 16 96 65-115 <br /> tert-Butyl alcohol 154 20 143 108 75-150 <br /> Do-isopropyl ether 15 2 050 151 101 75-125 <br /> 1,2-Dtbromoethane(EDB) 176 050 149 118 85-120 <br /> 1,2-Dtchloroethane 15 7 050 147 107 85 130 <br /> Ethanol 151 l00 142 106 70-135 <br /> Ethyl tert-butyl ether 15 9 050 ISO 106 75 130 <br /> Ethylbenzene 694 050 7 54 92 75-135 <br /> Methyl tert butyl ether 678 050 " 7 02 97 65-125 <br /> Toluene 371 050 372 100 85-120 <br /> Xylenes(total) 376 050 412 91 85-125 <br /> Gasoline Range Organics(C4-C12) 461 50 440 105 60-140 <br /> Surrogate 12-Dichloroelhane-d4 496 500 99 60-135 <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 18 of 24 <br />