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f Sequoia 819 Striker Avenue,Suite 8 Sacnuncnto,CA 95834 _ ► Analytical (916)921-9600 FAX(916)921-0100 www sequoialabs corn E7Kilgore ternational-Rancho Cordova Project ARCO 5450,Stockton,GA Road,Suite 100 Protect Numt?er 5450,Stockton,CA rdova CA 95670 pro ect M Reported 3 -Pr Clinton Hamis 03/08/02 17 34 Volatile Organic Compounds by EPA Method 826013 Sequoia Analytical-Sacramento =AnWlyte Repomng Result Limit Units Dilution Batch Prepared Analyzed Method Notes 0' S2 3 04 I SaM211101 02 2l 2 l 5 R cel ed W22/02 1111119 35 Tert-butyl alcohol ND 0 050 mg/kg 1 2020266 02/22/02 02/23/02 EPA 8260B Methyl tert-butyl ether 0 011 00050 Di-isopropyl ether ND 00050 Ethyl tert-butyl ether ND 00050 Tert-amyl methyl ether ND 00050 1,2-Dichloroethane ND 00050 Ethylene dibromide ND 00050 Surrogate 12-DCA-d4 792% 60-140S13- ^ - 1 2023 Water Sampled 02/21/02 1125 Received 02122/02 09 35 Tert-butyl alcohol ND 50 ugll 1 2020275 02/26/02 02/26/02 EPA 826013 Methyl tert-butyl ether 68 050 Di-isopropyl ether ND 050 Ethyl tert-butyl ether ND 050 Tert-amyl methyl ether ND 050 1,2-Dichloroethane ND 050 Ethylene dibrounde ND 050 Surrogate 1,2 DC,4-d4 844% 60-140 S&2 5' 5202335- Sort Sam led 02/21/021225 Received 02/22/02 09 35 Tert-butyl alcohol ND 0 050 mg/kg 1 2020266 02/22/02 02/23/02 EPA 8260B Methyl tert-butyl ether ND 00050 " Di-isopropyl ether ND 00050 Ethyl tert-butyl ether ND 00050 Tert-amyI methyl ether ND 00050 « 1,2-Dichloroethane ND 00050 Ethylene dibromide ND 00050 Surrogate 12 DCA-d4 842% 60-140 Sequoia Analytical-Sacramento The results in this report apply to the samples anal zed to accordance with the thorn P PPY p y 0 of custody document This analytical report must be reproduced to its enttrety Page Page 7 of 17