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819 Striker Avenue,Suite 8 <br /> Sequoia Sacramento CA <br /> 4 a- ) (916)921-96M <br /> FAX(916)921-0 100 <br /> Analytical www sequolalabs tom <br /> SQ0 <br /> IT Corporation-Sacramento Project Parkinson's ARCO,Stockton <br /> 1433 N Market Blvd,Ste 1 Project Number 880-0401A/01060000 Reported <br /> Sacramento CA,95834 Project Manager Kathleen Waldo 05102/O1 1 l 43 <br /> Volatile Oxygenate Compounds by EPA Method 8260A <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Anaiyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-1 (S104313-01)Water Sampled 04123/011150 Received 04123/0114 10 <br /> Tert-butyl alcohol 4780 1000 ug/l 5 1040310 04/26/01 04/26/01 EPA 8260A <br /> Di-isopropyl ether ND 100 " <br /> Ethyl tert-butyl ether ND 100 " <br /> Tert-amyl methyl ether 285 100 " <br /> Surrogate 1,2-DCA-d4 928% 60-140 " <br /> MW-1 (5104313-OIRE1)Water Sampled 04/23/01 11 50 Received 04/23/01 14 10 <br /> Methyl tert-butyl ether 39500 400 ug/l 200 1040342 04/30/01 04/30/01 EPA 8260A <br /> Surrogate 1,2-DCA-d4 896% 60-140 <br /> MW-2(S104313-02)Water Sampled 04/23/01 11 15 Received 04/23/01 14 10 <br /> Tert-butyl alcohol 697 200 ug/l 1 1040310 04/26/01 04/26/01 EPA 8260A <br /> -isopropyl ether ND 200 <br /> 1 cert-butyl ether ND 2 00 " <br /> rt-amyl methyl ether 67 5 2 00 " ' <br /> Surrogate 1,2-DC.4-d4 95 0 % 60-140 " <br /> MW-2(5104313-02RE1)Water Sampled 04/23/01 11 15 Received 04/23/01 14 10 <br /> Methyl tert-butyl ether 10400 100 ug/l 50 1040342 04/30/01 04/30/01 EPA 8260A <br /> Surrogate 1,2-DCA-d4 956% 60-140 " <br /> MW-3(S104313-03)Water Sampled 04/23/01 12 30 Received 04/23/01 14 10 <br /> Tert-butyl alcohol ND 200 ug/1 1 1040310 04/26/01 04/26/01 EPA 8260A <br /> Di-isopropyl ether ND 2 00 <br /> Ethyl tert-butyl ether ND 200 <br /> Tert-amyl methyl ether 4 23 200 " <br /> Surrogate 1,2-DCA-d4 102 % 60-140 " <br /> quota 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 to its entirety <br /> Page 3 of 10 <br />