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! Sequoia- 885 Jarvis Drive <br /> Morgan Hill,CA 95437 <br /> -e Analytical (408)776-9600 <br /> FAX(408)782-6306 <br /> ' 1 www.scquoialabs.cotn <br /> URS Corporation[Arcol] Project:ARCO#2130,Stockton,CA M0I0544 <br /> 2870 Gateway Oaks Dr.,Ste 300 Project Number:GOBZK-0002 Reported: <br /> Sacramento ICA,95833 Project Manager:Vemon P.Elarth 09/29/05 14:23 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical-Morgan Hill <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Not <br /> MW-1(MOI0544-01)Water Sampled:0911.11/05 12:25 Received:09/14/05 08:55 <br /> tert-Amyl methyl ether ND 0.50 ugll 1 5122001 09/22/05 09/22/05 EPA 82601 <br /> Benzene :, ND 0.50 <br /> tert-Butyl alcohol ND 20 „ <br /> Di-isopropyl ether ' ND 0.50 <br /> 1,2-Dichloroethane ND 0.50 " n <br /> Ethanol ! ND 100 <br /> Ethyl tert-butyl ether ND 0.50 " <br /> Ethylbenzene' ND 0.50 <br /> Methyl tert-butyl ether i 0.75 0,50 <br /> Toluene ND 0.50 <br /> Xylenes(total) { ND 0.50 " <br /> Gasoline Range Organics(C4-C12) 51 50 <br /> Surrogate:0-Dichloroethane-d4 75% 60-135 <br /> BMW-2{MOI11544-02}Water SamPicd:0911110512:45 Received:09/14/05 08:55 <br /> iert-Amyl methyl ether ND 0.50 ugll 1 SI22001 09!22105 09/22/05 EPA 8260B <br /> Benzene F 0.72 0.50 <br /> tert-Butyl alcohol ND 20 <br /> Di-isopropyl ether ND 0.50 " <br /> 1,2-Dichloroethane p 39 0.50 " <br /> Ethanol ND 100 " <br /> Ethyl tent-butyl ether ND 0.50 " <br /> Ethylbenzene ND 0.50 <br /> Methyl tert-butyl ether 1.3 0.50 <br /> Toluene ND 0.50 " <br /> Xylenes(total) .1 ND 0.50 <br /> Gasoline Range Organics(C4-C12) ND 50 " <br /> Surrogate:1,2-Dichloroethane-d4 82% 60-135 <br /> I <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain of <br /> '.i custody document.Unless otherwise stated,results are reported on a wet weight basis. <br /> This analytical report must be reproduced in its entirety. <br /> Page 3 of 25 <br />