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Sequoia B 19 Striker Avenue,Suite 8 <br /> Sacramento,CA 95834 <br /> (916)921-9600 <br /> FAX(916)921 0100 <br /> A nalyfi C?l www.sequolalabs.com <br /> 0 IwQr <br /> Delta Environmental Consultants(Cameron Park) Project: ARCO 5469,Stockton,CA <br /> 3330 Cameron Park Dr.Ste 550 Project Number: 5469,Stockton,CA Reported: <br /> Cameron Park CA,95682 Project Manager: Steve Carter 01/08/02 15:42 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MWi (5712225-01)Water Sampled: 12/1410108:44 Received: 12/14/01 10:37 <br /> Tert-butyl alcohol ND 5.0 ug/l 1 1120325 12/28/01 12/28/01 EPA 826013 <br /> Methyl tert-butyl ether 1.6 0.50 " <br /> Di-isopropyl ether ND 0.50 " <br /> Ethyl tert-butyl ether ND 0.50 " <br /> Tert-amyl methyl ether ND 0.50 " <br /> 1,2-Dichloroethane ND 0.50 " <br /> Ethylene dibromide ND 0.50 _ <br /> Surrogate: 1,2-DCA-d4 107% 60-140 <br /> MW2(S112225-02)Water Sampled: 12/1410108:37 Received:12/14/01 10:37 <br /> Tert-butyl alcohol ND 5.0 UgA 1 1120325 12/28/01 12/28/01 EPA 8260B <br /> Methyl tert-butyl ether ND 0.50 " <br /> Di-isopropyl ether ND 0.50 " <br /> Wyl tert-butyl ether ND 0.50 " <br /> "t-arnyl methyl ether ;1TD 0.50 <br /> 1,2-Dichloroethane ND 0.50 " <br /> Ethylene dibromide ND 0.50 <br /> Surrogate: 1,2-DCA-d4 114% 60-140 ^� <br /> MW3(5112225-03)Water Sampled: 12114/0108:30 Received: 12/14/0110-37 <br /> Tert-butyl alcohol ND 5.0 ugA 1 1120325 12/28/01 12/28/01 EPA 8260B <br /> Methyl tert-butyl ether 0.56 0.50 12/28/01 " <br /> Di-isopropyl ether ND 0.50 " 12/28/01 " <br /> Ethyl tert-butyl ether ND 0.50 " <br /> Tert-amyl methyl ether ND 0.50 " <br /> 1,2-Dichloroethane ND 0.50 " <br /> Ethylene dibromide ND 0.50 " <br /> Surrogate: 1,2-DCA-d4 112% 60-140 <br /> quoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document. This analytical report must be reproduced in its entirety. <br /> Page 5 of 14 <br />