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819 Striker Avenue,Suite 8 <br /> Sequoia Sacramento,CA 95834 <br /> 4 (916)9z 1-9600 <br /> 15) FAX(916)921-0100 <br /> OOw Analytical www.sequoialabs.com <br /> Delta Environmental Consultants(Cameron Park) Project: ARCO 5469, Stockton,CA <br /> 3330 Cameron Park Dr. Ste 550 ProjectNumber: 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 ,*.,unit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW6(S112225-06)Water Sampled: 12/14/0107:31 Received: 12/14/01 10:37 <br /> Tert-butyl alcohol ND 50 ug/l 10 1120325 12/28/01 12/28/01 EPA 82608 <br /> Di-isopropyl ether ND 5,0 " <br /> Etbyl tert-butyl ether ND 5.0 <br /> Tert-amyl methyl ether 17 5.0 <br /> 1,2-Dichloroethane ND 5.0 <br /> Ethylene dibromide ND 5.0 " <br /> Surrogate: 1,2-DCA-d4 112% 60-140 " <br /> MW6(5112225-06RE1)Water Sampled: 12/14/0107:31 Received: 1211410110:37 A-01 <br /> Methyl tert-butyl ether 14000 500 ugll 1000 2010035 01/04/02 01/04/02 EPA8260B <br /> Surrogate 1,2-DCA-d4 114% 60-140 <br /> MW7($112225-07)Water Sampled: 12/14/0104:48 Received: 12/14/01 10:37 A-01 <br /> ql-butyl alcohol ND 5.0 ug/l 1 2010063 01/07/02 01/07/02 EPA 8260B <br /> ethyl tert-butyl ether 18 0.50 " <br /> Di-isopropyl either ND 0.50 ^ <br /> Ethyl tert-butyl ether ND 0.50 <br /> Tert-amyl methyl ether ND U0 " ^ <br /> 1,2-Dichloroethane ND 0.50 <br /> Ethylene dibromide ND 0.50 <br /> Surrogate 1,2-DCA-d4 107% 60-140 <br /> MWS(S112225-08)Water Sampled: 12/14/0105:47 Received:12/14/01 10:37 <br /> Tert-butyl alcohol ND 500 ug/l 100 1120325 12/28/01 12/28/01 EPA 8260E <br /> Methyl tert-butyl ether 17000 50 <br /> Di-isopropyl ether ND 50 " <br /> Ethyl tert-butyl ether ND 50 <br /> Tert-amyl methyl ether ND 50 ^ <br /> 1,2-Dichloroethane ND 50 <br /> Ethylene dibromide ND 50 <br /> Surrogate; 1,1-DCA-d4 105% 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 7 of 14 <br />