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rY885 Jarvis DriveSequoia Morgan Hill CA 95037 <br /> (aas)775 9600 <br /> AnalytlCal _ FAx(aos)7x8 <br /> www sequocalabsbs cam <br /> Secor-Rancho Cordova(ARCO) Project ARCO#4932,Stockton,CA MN10277 <br /> 3017 Kilgore Rd Suite 100 Project Number N/P Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 09/23/04 16 56 <br /> Purgeable Hydrocarbons and BTEX by EPA 8015B/8021B <br /> Sequoia Analytical-Morgan Hill <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Note <br /> EFF(MN10277-03)Air Sampled 09/09/04 11 30 Received 09/10/04 10 00 HT-09 <br /> Gasoline Range Organics(C4-C 12) ND 10 mg/ml Air 1 4113005 09/13/04 09/13/04 EPA 8015B/ <br /> 80213 <br /> Benzene ND 010 " <br /> Toluene ND 010 " <br /> Ethylbenzene ND 010 <br /> Xylenes(total) ND 020 <br /> Methyl tert-butyl ether ND 050 " <br /> Surrogate a a a-Triuorotoluene 98% 56-134 " ^ <br /> Surrogate 4-BromoJluorobenzene 108% 70-130 " <br /> Gasoline Range Organics(C4-C12) ND 2 4 ppmv <br /> Benzene ND 0 031 " ^ <br /> Toluene ND 0 027 " <br /> Ethylbenzene ND 0 023 <br /> Xylenes(total) ND 0 047 <br /> Methyl tert-butyl ether ND 014 <br /> Surrogate a aa-Trrfluorotoluene 98% 56-134 <br /> Surrogate 4-Bromofluorobenzene 107% 70-130 ^ <br /> Sequoia Analytical-Morgan Hilt The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise slated results are reported on a wee weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 7 of 15 <br />