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404 N Wiget Lane , <br /> Sequoia Walnut Creek,CA 94598 <br /> (925)988-9600 <br /> FAX(925)988t9673 ! <br /> Analytical wwwseguotalabs corn ' <br /> Secor-Rancho Cordova Project Arco <br /> 3017 Kilgore Rd, Ste #100 Project Number Arco#595, Stockton Reported ' <br /> Rancho Cordova CA,95670 Project Manager Clint Harms 07-Aug-01 13 12 <br /> Volatile Organic Compounds by EPA Method 8260B 4 <br /> Sequoia Analytical- Walnut Creek <br /> i <br /> Reporting <br /> Analyte Result Limit Units Dilution- Batch Prepared Analyzed Method Notes <br /> PSB-1,80'(W107431-04) Soil Sampled 17-Jul-01 00 00 Received 24-Jul-01 13 27 <br /> Ethanol ND 25 mglkg 100 1 G2701 8 31-Jul-01 31-Jul-01 -EPA 8260E <br /> tcrt-Butyl alcohol ND 25 " <br /> Methyl tert-butyl ether ND 020 " <br /> Di-isopropyl ether ND 0 10 " <br /> Ethyl tert-butyl ether ND 0 10 s ' <br /> cert-Amyl methyl ether ND 0 10 <br /> 1,2-Dichloroethane ND OIO " <br /> 1,2-Dibromoethane ND 020 <br /> Surrogate Dibromofluoromethane - -- " 101 % 50-150 <br /> Surrogate 1,2-Dichloroelhane-d4 103% 50-150 " <br /> PSB-1,90'(Wi07431-05)Soil Sampled 17-Jul-01 00 00 Received 24-Jul-01 13 27 ' <br /> Ethanol ND 25 mg/kg l00 1G27018 31-Jul-01 31-Jul-01 EPA 8260B <br /> tert-Butyl alcohol ND 2 5 <br /> Methyl tert-butyl ether ND 020 " <br /> Di-isopropyl ether ND 010 <br /> Ethyl tert-butyl ether ND 0 10 <br /> tert-Amyl methyl ether ND 010 " <br /> 1,2-Dichloroethane ND 010 " <br /> 1,2-Dibromoethane ND 020 <br /> Surrogate Dibromofluoromethane _ 988% 50-150 r <br /> Surrogate 1,2-Dlchloroethane-d4 __-_ _ 103% 50-150 <br /> PSB-2,10'(W107431-06)Soil Sampled 19-Jul-01 00 00 Received 24-Jul-01 13 27 <br /> Ethanol ND 25 mg/kg i00 1G27018 31-Jul-01 02-Aug-0t EPA 8260B <br /> tert-Butyl alcohol ND 25 <br /> Methyl tert-butyl ether ND 020 <br /> 1)i-icnnrnnvl ether ND 010 <br /> Ethyl tert-butyl ether ND 0 10 <br /> tert-Amyl methyl ether ND 010 <br /> 1.2-Dichloroethane ND 010 " <br /> 1,2-Dibromoethane ND 020 <br /> Surrogate Dibromofluoromethane 100% 50-150 <br /> T Surrogate 1,2=DichloAoethane-d4" 102%-- 50-150 <br /> Sequoia Analytical - Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document 7h+s analytical report must be reproduced in its entrre0 <br /> 1 <br /> Page 7 of 15 <br />