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819 Striker Avenue Suite 8 , Sacramento CA 9S834 Sequoia (9 16)921-%W FAX(916)921-0 100 Analytical vmww sequolalabs r_om ' SECOR International-Rancho Cordova Project Arco 4932,Stockton,CA , 3017 Kilgore Road,Suite 100 Project Number N/A Reported Rancho Cordova CA,95670 Project Manager Rusty Benkosky 08/01/01 18 25 Volatile Oxygenate Compounds by EPA Method 8260A ' Sequoia Analytical - Sacramento Reportm6 ' Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Nuns '*IW-8 @ 30 0'(S 107224-06)Sod Sampled 07/16/01 11 45 Received 07/18/01 14 40 ' Pert-butyl alcohol ND 10 mg/kL l 1070264 07/27/01 07/27/01 F-PA 8260A Methyl tert-butyl ether ND 0 10 ]i-isopropyl ether ND 0 10 Ethyl tert-butyl ether ND 0 10 " reit-amyl methyl ether ND 0 10 I 2-Dichloroethane ND 010 " ethylene dibromide ND 0 10 Surrogate 12-DCA-d4 _ 980% 60-140 MW-8 @ 35 0' (S 107224-07)Soil Sampled 07/16/01 12 45 Received 07/18/01 1440 reit-butyl alcohol ND 10 mg/kg 1 1070264 07/27/01 07/27/01 EPA 8260A ' Methyl tert-butyl ether ND 0 10 D1-isopropyl ether ND 0 10 " Ethyl tert-butyl ether ND 0 10 Tert-amyl methyl ether ND 0 10 " 1,2-Dichloroethane ND 010 " Ethylene dibromide ND 010 Surrogate 12-DCA-d4 980% 60-140 ' MW-8 @ 40 0'(5107224-08)Soil Sampled 07/16/01 13 00 Received 07/18/01 1440 Tert-butyl alcohol ND 10 mg/kg 1 1070264 07/27/01 07/27/01 EPA 8260A ' Methyl tert-butyl ether ND 010 " Di-isopropyl ether ND 010 Ethyl tert-butyl ether ND 010 Text-amyl methyl ether ND 010 " 1,2-Dichloroethane ND 010 Ethylene dibromlde ND 010 Surrogate 12-DCA-d4 104% 60-140 ' r Sequoia Analytical -Sacramento The results in this report apply to the samples analyzed in accordance with the chain custody document This analytical report must be reproduced to its entirety , Page 5 of 8 I