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Sequoia 885 Jarvis Drive <br /> Morgan Hill,CA 95037 <br /> Analytical <br /> (408)776-9600 <br /> .� 't Analytical FAX(408)782-6308 <br /> www.sequoialabs.com <br /> I <br /> URS Corpoption[Arcoll Project;ARCO#2130,Stockton,CA MOI0544 <br /> 2870 Gateway Oaks Dr„Ste 300 Project Number:GOBZK-0002 Reported: <br /> Sacramento CA,95833 Project Manager:Vernon A.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 Note <br /> MS-2B(MOI0544-21)Water Sampled:0911110513:05 Received:09/14/05 08:55 <br /> tert-Amyl meihyl ether ND 0.50 ugll 1 5I22020 09/22/05 09/23/05 EPA 82608 <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 <br /> Ethanol ND 100 " <br /> Ethyl tert-butyl ether ND 0.50 " <br /> Ethylbenzenek ND 0.50 <br /> Methyl tert-butyl ether ND 0.50 " <br /> Toluene ND' 0.50 " <br /> Xylenes(total) ND 0.50 <br /> Gasoline Range Organics(C4-C]2) ND 50 " <br /> Surrogate:1,2-Dichloroelhane-d4 83% 60-135 " <br /> MS-3A(MO10544-22)Water Sampled:09/11/05 13:20 Received:09/14/05 08:55 BU <br /> %motert-Arnyl methyl ether ND 1.0 ugll 2 5126007 09126105: 09/27/05 EPA 82608 <br /> Benzene ,; 15 1.0 " <br /> tert-Butyl alcohol ND 40 " <br /> Di-isopropyl ether ND 1.0 " <br /> 'k <br /> 1,2-Dichloroethane 1.2 1.0 " <br /> Ethanol a ND 200 " IC <br /> Ethyl tert-butyl ether ND 1.0 " <br /> Ethylbenzene 6.2 1.0 " <br /> Methyl tert-butyl ether 110 1.0 " <br /> Toluene N 1.4 1.0 " <br /> Xylenes(total) 1.8 1.0 " <br /> Gasoline Ranige Organics(C4-C12) 170 100 " <br /> Surrogate:1,2-Dichloroethane-d4 85% 60-135 " <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain of <br /> �t custody document.Unless otherwise stated,results are reported on a wet weight basis. <br /> j��.rr'Jy This analytical report must be reproduced in its entirety. <br /> Page 13 of 25 <br />