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Sequoia <br />819 Striker Avenue Suite 8 <br />Sacramento CA 95834 <br />Received <br />(916) 921 9600 <br />Analytical <br />FAX <br />aldbs 92 1 00 <br />www sequotlabs c qucorn <br />SECOR International - Rancho Cordova Project Arco 4932 Stockton CA <br />3017 Kilgore Road Suite 100 Project Number NIA Reported <br />Rancho Cordova CA 95670 Project Manager Rusty Benkosky 03/21/01 17 27 <br />Volatile Oxygenate Compounds by EPA Method 8260A <br />Sequoia Analytical - Sacramento <br />Reporting <br />Analyte Result Limit Units Dilution Batch Prepared Analy7cd MLihod Notes <br />MW -4 (S103103-04) Water Sampled <br />03/05/01 17 12 <br />Received <br />03/07/0107 55 <br />Tert-butyl alcohol <br />11600 <br />2000 <br />ug/I 10 1030167 03/14/01 03/14/01 EPA 8260A <br />Di -isopropyl ether <br />ND <br />200 <br />200 ^ <br />Ethyl tert-butyl cher <br />ND <br />200 <br />Ethylene dibromide <br />Tert-amyl methyl ether <br />537 <br />200 <br />1 2-Dichloroethane <br />ND <br />200 <br />" <br />Ethylene dibromid_e <br />ND <br />-- - - <br />200 <br />- <br />- - -60-140 - <br />sw rogate 12 -DCA -d4 <br />976% <br />-- - <br />MW4 (5103103-04RE1) Nater Sampled 03/05/01 17 12 Received 03/07/0107 55 <br />Methyl tert-butyl ether <br />_ 46_6000 <br />4000 <br />ug/I 2000 1030199 03/16/01 03/16/01 EPA 8260A <br />Surrogate 12 -DCA -d4 <br />902% <br />60-140�- <br />SVE-1(5103103-05) Water Sampled <br />03/05/01 17 33 <br />Received <br />03/07/0107 55 R-05 <br />Teri -butyl alcohol <br />ND <br />2000 ug/1 10 1030167 03/14/01 03/14/01 <br />Ak sopropyl ether <br />ND <br />200 " <br />qW,1 tert-butyl ether <br />ND <br />200 " <br />Tert-amyl methyl ether <br />ND <br />200 ^ <br />1,2-Dichloroethane <br />ND <br />200 " <br />Ethylene dibromide <br />ND <br />200 " <br />EPA 8260A <br />urrogate - - 8 0 6 - 40 <br />SVE-1 (S 103103-05RE1) Water Sampled 03/05/01 17 33 Received 03/07/0107 55 <br />Methyl tert-butyl ether 3720 50 0 ug/l 25 1030199 03/16/01 03/16/01 EPA 8260A <br />Surrogate 1 2-DC4-d4 882 % 60-140 -- — -- - ' - <br />Sequoia Analytical - Sacramento <br />0 <br />The results in this report apply to the samples analy_ed in accordance it ah the chain of <br />custody document This analytical report [mist be reproduced in its entirety <br />Page 5 of 12 <br />