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885 Jarvis Dr <br /> Sequoia lNorgaa Hill,CA 95037 <br /> (408)776-9600 <br /> Anal 'calFAX 408 782-6308 <br /> www-wquoialabs.cotr <br /> URS Corporation f 11 Project: ARCO#548,Stockton,Ca MMB0732 <br /> 2870 Gateway Oaks Dr.,Ste 300 Project Number: ARCO#548,Stockton,CA Reported: <br /> Sacramento CA,95833 Project Manager: Vern Earth 03/18/03 I8:06 <br /> Total Purgeable Hydrocarbons(C6-CIO)by EPA 8015B modified,BTEXM by EPA 8021B <br /> Sequoia Analytical Mo an Hill <br /> q � - � <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> INF Total AIr OM072-01) it Sampled:02/25/03 12:55 Received:02/25/03 15:50 <br /> Gasoline Range Organics(C6-C10) 50 10 mg/m'Air 1 31327021 02/27/03 02/27/03 8015Bm/8021 <br /> B <br /> Benzene ND 0.10 <br /> Toluene 0.25 0.10 <br /> Ethylbenzene ND 0.10 <br /> Xylenes(total) 1.2 0.10 <br /> Methyl tert-butyl ether ND 0.50 " <br /> Surrogate:a,a,a-TriJluorotoluene 115% 56-134 <br /> INF Cat Air 732-02 Air Sam led:02/25/03 12:50 Received:02/25/03 15:50 <br /> Gasoline Range Organics(C6-C10) 50 10 mg/m'Air t 3B27021 02/27/03 02/27/03 801513m/8021 <br /> B <br /> Benzene ND 0.10 <br /> Toluene 0.25 0.10 <br /> Wthylbenzene ND 0.10 <br /> ylenes(total) 1.2 0.10 <br /> Methyl tert-butyl ether ND 0.50 <br /> Surrogate:a,a,a-Trilluorotoluene 112% 56-134 " <br /> ERF Air 0732-03 Air Sampled:0212510312:45 Received:0212510315:50 <br /> Gasoline Range Organics(C6-CIO) ND 10 mg/m'Air 1 3B27021 02/27/03 02/27/03 8015Bm/8021 <br /> B <br /> Benzene ND 0.10 <br /> Toluene ND 0.10 <br /> Ethylbenzene ND 0.10 " <br /> Xylenes(total) ND 0.10 " <br /> Methyl tent-butyl ether ND 0.50 <br /> Surrogate:a,a,a-Trinuorotoluene 104% 56-134 " <br /> �equoia Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document. Unless otherwise stated,results are reported on a wet weight <br /> basis. This analytical report must be reproduced in its entirety. <br /> 4 of 9 <br />