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819 Striker Avenue, Suite 8 <br /> Sequoia Sacramento CA 95834 <br /> (916)921-9600 <br /> FAX(9 921 <br /> Analytical www sequuoialabsO100 corn <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 /> Cameron Park CA,95682 Project Manager Tay Johnson 11/19/01 14 48 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical- Sacramento <br /> Reporting <br /> Analyze Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> VW5-53' (S111076-01)Water Sampled 11/06/01 10 32 Received 11/06/01 12 47 <br /> Tert-butyl alcohol ND 100 ugll I 1110102 11/09/01 11/09/01 EPA 82608 <br /> Methyl tert-butyl ether 33 10 " <br /> Di-isopropyl ether ND 1 0 " <br /> Ethyl tert-butyl ether ND 1 0 <br /> Tert-amyl methyl ether _ ND 10 <br /> Surrogate 1 2-DCA-d4 948% 60-140 " <br /> VW643'(5111076-02)Water Sampled 11/06/01 10 43 Received 11/06/01 12 47 R-05 <br /> Tert-butyl alcohol ND 20000 ug/l 200 1110102 11/09/01 11/09/01 EPA 8260B <br /> Methyl tent-butyl ether 230 200 " <br /> Dl-isopropyl ether ND 200 " <br /> Ethyl tert-butyl ether ND 200 <br /> Tert-amyl methyl ether _ _ ND 200 <br /> rrogate 1 2-DCA-d4 a 880% 60-140 <br /> MW2-61' (Si11076-03)Water Sampled 11/06/01 11 00 Received 11/06/01 12 47 <br /> Tert-butyl alcohol ND 100 ug/l 1 1110102 11/09/01 11/09/01 EPA 8260B <br /> Methyl tert-butyl ether ND 10 <br /> Di-isopropyl ether ND 10 " <br /> Ethyl tert-butyl ether ND 1 0 <br /> Tert-amyl methyl ether ND 10 " <br /> Surrogate 1 2-DCA-d4 ----_——� 848% --— 60-140 <br /> Aft <br /> equoia Analytical - Sacramento The results in this report apply to the samples analysed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 3 of 7 <br />