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SequoiaA9[0 Dr <br /> Margin Hill,,CA 9503737 <br /> Analytical (408)775 9600 <br /> FAX(408)782-6308 <br /> www sequoialabs can <br /> Secor-Rancho Cordova Project ARCO#4932,Stockton,CA MMB0227 <br /> 3017 Kilgore Rd Suite 100 Project Number ARCO#4932,Stockton,CA Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 02/25/03 11 03 <br /> Total Purgeable Hydrocarbons (C6-C10) by EPA 8015B modified, BTEXM by EPA 8021B <br /> Sequoia Analytical - Morgan Hill <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-11 0227-07 Water Sampled 01/30/03 12 34 Received 02/06/03 16 3.0 <br /> Gasoline Range Organics(C6-C 10) -ND 50 ug/! 1 3B11005 02/11/03 02/12/03 8015Bm/8021B 0-11 <br /> Benzene ND 050 " <br /> Toluene ND 0 50 <br /> Ethylbenzene ND 0 50 Q-23a <br /> Xylenes(total) ND 050 " " " Q-23 <br /> Methyl tert-butyl ether ND 2 5 " Q-23 <br /> Surrogate a,a a-Trti luorotoluene 117% 55-142 Q-23b <br /> EW-1(MMB0227-08)Water Sampled 01/31/03 14 44 Received 02/06/03 16 30 <br /> Gasoline Range Organics(C6-C10) 220000 100000 ug/l 2000 3B12002 02/12/03 02/12/03 8015Bm/8021B <br /> Benzene 8000 1000 <br /> Toluene 31000 1000 <br /> Ethylbenzene 4400 1000 " <br /> Xylenes(total) 23000 1000 <br /> Methyl tert-butyl ether 140000 5000 <br /> rragate a,a,a-Trifluorotoluene 971 % 55-142 0-09 <br /> EW-2 MMB0227-09 Water Sampled 01/31/03 13 43 Received 02/06/03 16 30 <br /> Gasoline Range Organics(C6-C10) 12000 5000 ugll 100 3812005 02/12/03 02/12/03 8015Bm/8021B HC-19 <br /> Benzene ND 50 <br /> Toluene ND 50 " <br /> Ethylbenzene ND 50 " <br /> Xylenes(total) ND 50 " <br /> Methyl tert-butyl ether 52000 250 E <br /> Surrogate a,a,a-Trruorotoluene 951 % 55-142 " <br /> quota 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 /> Thu analytical report must be reproduced in its entirety <br /> 5 of 21 <br />