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819 Striker Avenue Sulte 8 <br /> Sequoia Sacramento CA 95834 <br /> IT) (916)921-9600 <br /> Analytical FAX(916)921-0100 <br /> wwwOW sequoialabs com <br /> IT Corporation-Sacramento Project Parkinson's ARCO,Stockton <br /> 1433N Market Blvd,Ste 1 Project Number 880-040 1AI01060000 Reported <br /> Sacramento CA,95834 Project Manager Kathleen Waldo 05/02/01 1143 <br /> Volatile Oxygenate Compounds by EPA Method 8260A - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result °/OREC Limits RPD Limit Notes <br /> Batch 1040310-EPA 5030B JPM <br /> Blank(1040310-BLK1) Prepared&Analyzed 04/26/01 <br /> Tert-butyl alcohol ND 200 ug/l <br /> Methyl tert-butyl ether ND 200 " <br /> Di-isopropyl ether ND 200 " <br /> Ethyl tert-butyl ether ND 200 " <br /> Tert-amyl methyl ether ND 200 " <br /> Ethanol ND 3000 " <br /> Surrogate 1 2-DCA-d4 490 500 980 60-140 <br /> LCS(1040310-BS1) Prepared&Analyzed 04/26/01 <br /> Methyl tert-butyl ether 496 200 ug/l 500 992 60-140 <br />*ogate 1,2-DCA-d4 478 500 956 60-140 <br /> 1ïż½Iatrtx Spike(1040310-MSI) Source 5104331-08 Prepared&Analyzed 04/26/01 <br /> Methyl tert-butyl ether 499 200 ug/1 500 ND 998 60-140 <br /> Surrogate 12-DCA-d4 488 11500 976 60-140 <br /> Matrix Spike Dup(1040310-MSDI) Source 5104331-08 Prepared&Analyzed 04/26/01 <br /> Methyl tent-butyl ether 497 200 ug/l 500 ND 994 60-140 0 402 25 <br /> Surrogate 1,2-DCA-d4 487 500 974 60-140 <br /> Batch 1040332-EPA 5030B [P/TJ <br /> Blank(1040332-BLK1) Prepared&Analyzed 04/27/01 <br /> Tert-butyl alcohoi ND 200 ug/l <br /> Methyl tert-butyl ether ND 200 " <br /> Di-isopropyl ether ND 200 " <br /> Ethyl tent-butyl ether ND 200 " <br /> Tert-amyl methyl ether ND 200 " <br /> Ethanol ND 3000 " <br /> Surrogate 1 2-DCA-d4 506 500 101 60-140 <br /> Am <br /> quola 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 7 of 10 <br /> TR <br />