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819 Striker Avenue,Suite 8 <br /> { <br /> Sequoia <br /> Sacramento, 92 -9600 <br /> J V (916)921-9600 <br /> FAX(916)921-0100 <br /> AnalyticalwnaAvsecluoialahs.com <br /> 1 i <br /> Delta Environmental Consultants(Cameron Park) Project: Arco 6100,Tracy,CA <br /> 3330 Cameron Park Dr. Ste 550 Project Number: ARCO 6100,Tracy,CA Reported: <br /> i Cameron Park CA,95682 Project Manager, Jay Johnson 11/19/01 14:x}8 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> a <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Ana€yte Result limit Units Dilution Batch Prepared Analyzed Method Notes <br /> 1 <br /> VW5-53' (S111076-01)Water Sampled: 11/06/01 10:32 Received: 11/06/01 12:47 <br /> 3 <br /> Tert-butyl alcohol ND 100 ug/l 1 1110102 11/09/01 11/09/01 EPA 8260B ; <br /> S <br /> Methyl tert-butyl ether 3.3 1.0 ' <br /> Di-isopropyl ether ND 1.0 <br /> Ethyl tert-butyl ether ND 1.0 " <br /> Tert-amyl methyl ether ND 1.0 <br /> Surrogate: 1,2-DCA-d4 94.8% 60-140 <br /> 1 VW643' (S111076-02)Water Sampled: 11/06/0110:43 Received: 11/06/01 12:47 R-05 <br /> Tert-butyl alcohol ND 20000 ug/I 200 1110102 11/09/01 11/09/01 EPA 9260B <br /> Methyl tert-butyl ether 230 200. <br /> Di-isopropyl ether ND 200 " <br /> Ethyl tert-butyl ether ND 200 <br /> Tert-amyl methyl ether ND 200 <br /> I -rogate: 1,2-DCA-d4 --- 88.0% 60-140 " <br /> MW2-61'(S111076-03)Water Sampled. 11/06/0111:00 Received: 11/06/01 12:47 <br /> I, � <br /> Tert-butyl alcohol ND 100 ugll 1 1110102 11/09/01 11/09/01 EPA 8260. <br /> Methyl tert-butyl ether ND 1.0 <br /> Di-isopropyl ether ND 1.0 <br /> Ethyl tert-butyl ether ND LO " <br /> Tert-amyl methyl ether — –---- ND 1.0 - <br /> i <br /> �i Surrogate: 1,2-DCA-d4 84.8% 60-140 " <br /> is - • <br /> 5 <br /> i <br /> { <br /> y�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 /> i <br /> Page 3 of 7 <br />