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819 Striker Ave Ste 8 <br /> Sequoia Saotamenta,CA 95834 <br /> Analytical (9 -9600 <br /> FAX(916)921-0100 <br /> www.seguoialanoialahs.com <br /> Gettler-Ryan-Dublin Project; Former Unocal 0187,Stockton,CA S309067 <br /> 6747 Sierra Court, Ste.J Project Number; N/A Reported: <br /> Dublin CA,94568 Project Manager: Deanna L.Harding 09/15/03 16:39 <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 /> U-25(S309067-26)Water Sampled:08/28/03 16:41 Received:09/02/03 16:20 . <br /> Tert-butyl alcohol ND 5.0 ug/1 1 3090068 09/04/03 09/05/03 EPA 8260B <br /> Methyl tert-butyl ether ND 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 /> Surrogate: 1,2-DCA-d4 96% 60-140 " <br /> U-26(S309067-27)Water Sampled:08/29/03 09:51 Received.0910210316:20 <br /> Tert-butyl alcohol ND 5.0 ug/I 1 3090075 09/05/03 09/05/03 EPA 8260B <br /> Methyl.tert-butyl ether 2.5 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 /> Surrogate: 1,2-DCA-d4 94% 60-140 . <br /> NP-1-22(S309067-28)Water Sampled:0812810312;00 Received:09/02/03 16:20 <br /> Tert-butyl alcohol ND 5.0 ug/I 1 3090068 09/04/03 09/05/03 EPA 8260B <br /> Methyl tert-butyl ether ND 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 /> Surrogate: 1,2-DCA-d4 84% 60-140 <br /> NP-1-65(5309067-29)Water Sampled:08/28/03 12:41 Received:09/0210316:20 <br /> Tert-butyl alcohol ND 5.0 ugll 1 3090081 09/05/03 09/05/03 EPA 8260E <br /> Methyl tert-butyl ether ND 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 /> Surrogate: 1,2-DCA-d4 81916 60-140 " <br /> Sequoia Analytical- Sacramento The results in this report apply to the samples analyzed in 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 21 of 29 <br />