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f Sequoia 819 Striker Avenue Suite 8 l Sacramento,CA 95834 (916)921-9600 1 FAX 2 1 00Analytical www sequoialabs com I Delta Environmental Consultants(Cameron Park) Project Arco 2130, Stockton, CA 3330 Cameron Park Dr Project Number NIA Reporters Cameron Park CA, 95682 Project Manager Jay Johnson 01/08/01 14 34 f Volatile Oxygenate Compounds by EPA Method 8260A r Sequoia Analytical - Sacramento Reporting j Analyte Result Limit Units Dilution Hatch Prepared Analyzed Method Notes MW-I (S012300-01)Water Sampled 12/19/00 IQ 42 Received 12/20/00 12 42 Tert-butyl alcohol ND 200 ug/1 1 1010001 01/02/01 01/02/01 EPA 8260A Methyl tert-butyl ether ND 200 „ Di-isopropyl ether ND 200 " Ethyl tert-butyl ether ND 200 " Tert-amyl methyl ether ND 200 Surrogate 1,2-DCA-d4 115% 60-140 " MW-2(8012300-02)Water Sampled 12/19/00 13 20 Received 12/20/00 12 42 1-02 Tert-butyl alcohol ND 200 ugR 1 1010001 01/02/OI 01/03/01 EPA 8260A Methyl tert-butyl ether ND 200 Di-isopropyl ether ND 200 Ethyl tert-butyl ether ND 200 " Tert-amyl methyl ether ND 200 " Surrogate 1 2-DCA-d4 111 % 60-140 W-3(S012300-03)Water Sampled I2/19/00 08 00 Received 12/20/00 12 42 I-02 Tert-butyl alcohol ND 200 ug/l l 1010001 01/02/01 01/03/01 EPA 82606 Methyl tert-butyl ether ND 200 „ Di-isopropyl ether ND 200 „ Ethyl tert-butyl ether ND 200 „ Tert-amyl methyl ether LL� ND 200 Surrogate 1,2-DCA-d4 113% 60-140 " MW-4(5012300-04)Water Sampled 12/19/000703 Received 12/20/00 12 42 I-02 Tert-butyl alcohol ND 200 ug/1 1 1010001 01/02/01 01/03/01 EPA 8260A Methyl tert-butyl ether ND 200 " Di-isopropyl ether ND 200 „ Ethyl tert-butyl ether ND 200 Tert-amyl methyl ether ND 200 Surrogate 12-DCA-d4 106% 60-140 uosa Analytical- Sacramento The results to this report apply to the samples analyzed in accordance with the chain of custody aocument This analytical report must be reproduced in its entirety Page 5 of 10