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a— —) <br /> 885 ,CA Drive <br /> Sequola Morgan Hill1,CA 95037 <br /> Analytical (408)776-9500 <br /> iqWFAX(408)782-6306 <br /> www,sequoialabs.com <br /> Secor-Rancho"Cordova(ARCO) Project:ARCO#2133, Stockton,CA MPC0947 <br /> 3017 Kilgore Rd. Suite 100 Project Number:77BP.52133.06.0002 Reported: <br /> Rancho Cordova CA,95670 Project Manager;Brian Carey 04/15/06 12:28 <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 /> E-4(MPC0947-03)Water Sampled:0312210616:00 Received: 03/24/06 08:20 <br /> tert-Amyl methyl ether ND 0.50 ug/l 1 6DO5004 04/05/06 04/05/06 EPA 8260B <br /> Benzene ND 0.50 " <br /> tert-Butyl alcohol ND 20 " <br /> Di-isopropyl ether ND 0.50 " <br /> 1,2-Dibromoethane(EDB) ND 0.50 " <br /> 1,2-Dichloroethane 0.88 0.50 " <br /> Ethanol ND 300 " <br /> Ethyl tert-butyl ether ND 0.50 " <br /> Ethylbenzene ND 0.50 " <br /> Methyl tert-butyl ether 4.4 0.50 " <br /> Toluene ND 0.50 " <br /> Xylenes(total) ND 0.50 " <br /> Gasoline Range Organics(C4-C12) 67 50 " <br /> urrogate: 1,2-Dichloroethane-d4 102 % 80-135 " <br /> rrogate: Toluene-d8 91 % 70-130 " <br /> urrogate:Dibromofluoromethane 98% 85-130 " <br /> Surrogate:4-Bromofluorobenzene 92 % 60-115 " <br /> E-5(MPC0947-04)Water Sampled:03/22/06 18:28 Received:03/24/06 08:20 <br /> tert-Amyl methyl ether ND 0.50 ugll l 6DO5004 04/05/06 04/05/06 EPA 82608 <br /> Benzene ND 0.50 " <br /> tert-Butyl alcohol ND 20 " <br /> Di-isopropyl ether ND 0.50 " <br /> 1,2-Dibromoethane(EDB) ND 0.50 " <br /> 1,2-Dichloroethane ND 0.50 " <br /> Ethanol ND 300 " <br /> Ethyl tent-butyl ether ND 0.50 " <br /> Ethylbenzene 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-C12) ND 50 " <br /> Surrogate: 1,2-Dichloroethane-d4 100% 80-135 " <br /> Surrogate: Toluene-d8 92% 70-130 <br /> Surrogate: DibromoJluaromethane 96% 85-130 ;i " " <br /> Surrogate: 4-Bromofluorobenzene 95% 60-115 " <br /> equoia 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 /> This analytical report must be reproduced in its entirety. <br /> Page 4-of 19 <br />