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819 Stnker Ave Ste 8 <br /> Sequoia Sacram(995s <br /> 34 <br /> 6�116) 2 % <br /> 100 <br /> Wo Analytical wwseqFAX 6talabs om <br /> www sequoialabs oom <br /> G yan-Dublin Project Former Unocal 0187,Stockton,CA 5302221 <br /> 6747 Sierra Court,Ste J Project Number NIA Reported <br /> Dublin CA,94568 Protect Manager Deanna L Harding 02/28/03 19 02 <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 /> NP-1-111 5302221-30 Water Sampled 02/06/03 14 15 Received 02/07/0310 30 <br /> reit-butyl alcohol ND 100 ug/l 1 3020288 02/20/03 02/20/03 EPA 8260E <br /> Methyl tert-butyl ether ND 20 <br /> Di-isopropyl ether ND 2 0 <br /> " <br /> Ethyl tert-butyl ether ND 20 <br /> Tert-amyl methyl ether ND 2 0 <br /> Surrogate 1,1-DCA-d4 99% 60-140 <br /> NP-2-22 5302221-31 Water Sampled 02/05/03 14 15 Received 02/07/0310 30 <br /> Tert-butyl alcohol ND 100 ug/l 1 3020220 02/18/03 02/19/03 EPA 8260B <br /> Methyl tert-butyl ether ND 20 " <br /> Di-isopropyl ether ND 20 <br /> Ethyl tert-butyl ether ND 2 0 " <br /> Tert-amyl methyl ether ND 2 0 <br /> Surrogate 1,1-DCA-d4 111 % 60-140 " <br /> NBM60 S302221-32 Water Sampled 021051031445 Received 02/07/03 10 30 <br /> T tyl alcohol ND 100 u8n 1 3020220 02/18/03 02/19/03 EPA 8260B <br /> „ <br /> Methyl tent-butyl ether ND 20 <br /> " <br /> Di-tsopropyi ether ND 20 „ <br /> Ethyl tert-butyl ether ND 2 0 <br /> Tert-amyl methyl ether <br /> ND 20 " <br /> Surrogate 1,2-DCA-d4 118% 60-140 " <br /> NP-2-116 5302221-33 Water Sampled 02/05/03 15 10 Received 02/07/03 10 30 <br /> Tert-butyl alcohol ND 100 ug/I 1 3020220 02/18/03 02/19/03 EPA 8260E <br /> " <br /> Methyl tert-butyl ether ND 20 <br /> Di-isopropyl ether ND 20 " <br /> Ethyl tent-butyl ether ND 20 " <br /> Tert-amyl methyl ether ND 20 <br /> Surrogate 1,2-DCA-d4 122% 60-140 " <br /> oia Analytical-Sacramento The results in this report apply to the samples analyzed to 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 22 of 33 <br />