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5i <br /> Sequoia 819 Striker Avenue Suite 8 <br /> Sacramento,CA 95834 <br /> (916)921-9600 <br /> FAX(916)921-0100 <br /> a- -N <br /> Analytical www sequolalabs com <br /> IT Corporation-Sacramento Project Parkinson's ARCO, Stockton <br /> 1326 N Market Blvd Project Number 880-040 1A/01060000 Reported <br /> Sacramento CA,95834 Project Manager Kathleen Waldo 11/15/01 16 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 /> MW-1 (5111033-01)Water Sampled 11101/0107 52 Received 11/01/01 11 30 <br /> Tert-butyl alcohol 2400 2000 ug/I 20 1110102 11/09/0I 11/09/01 EPA 8260E <br /> Di-isopropyl ether ND 20 " <br /> Ethyl tert-butyl ether ND 20 " <br /> Tert-amyl methyl ether 190 20 " <br /> Surrogate 12-DCA-d4 904% 60-140 " <br /> MW-1 (5111033-01RE1)Water Sampled 11/01/010752 Received 11/01/01 11 30 <br /> Methyl tert-butyl ether 24000 400 ug/l 400 1110102 11/09/01 11/09/01 EPA 8260B <br /> Surrogate 1,2-DCA-d4 896% 60-140 " <br /> MW-2(S111033-02)Water Sampled 11/01/010855 Received 11/01/01 11 30 <br /> Tert-butyl alcohol ND 100 ug/I 1 1110102 11/09/01 1 l/09101 EPA 8260B <br /> isopropyl ether ND 10 <br /> IIWyl tert-butyl ether ND 10 <br /> Tert-amyl methyl ether 21 10 " <br /> Surrogate 12-DCA-d4 912% 60-140 " <br /> MW-2(S111033-02RE1)Water Sampled 11/01/010855 Received 11/01/0111 30 <br /> Methyl tert-butyl ether 3100 400 ug/1 400 1110102 11/09/01 11/09101 EPA 8260B <br /> Surrogate 1 2-DCA-d4 892% 60-140 <br /> MW-3(5111033-03)Water Sampled 11/01/010824 Received 11/01/01 11 30 <br /> Tert-butyl alcohol ND 100 ug/1 1 1110102 11/09/01 11/09/01 EPA 8260B <br /> Di-isopropyl ether ND 10 " <br /> Ethyl tert-butyl ether ND 10 " <br /> Tert-amyl methyl ether 46 10 " <br /> Surrogate 1,2-DCA-d4 912% 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 This analytical report must be reproduced in its entirety <br /> Page 3 of 7 <br />