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819 Striker Avenue,Suite 8 <br /> Sequoia Sacramento.CA 95834 <br /> �^gg <br /> ++�� www.sequotaiaL-)s.com 9z 1-9600 <br /> Analytical FAX(916)921-0100 <br /> . ww.sequotatabs.com <br /> Delta Environmental Consultants(Cameron Park) Project: ARCO 5469,Stockton,CA <br /> 3330 Cameron Park Dr.Ste 550 Project Number: 5469,Stockton,CA Reported: <br /> Cameron Park CA,95682 Project Manager: Steve Carter 03/06/02 13:41 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical- Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2020275-EPA 5030B (P/T <br /> Blank(2020275-BLK1) Prepared&Analyzed:02/26/02 <br /> Tert-butyl alcohol ND 5.0 uSA <br /> Methyl tort-butyl ether ND 0.50 " <br /> Di-isopropyl ether ND 0.50 " <br /> Ethyl tent-butyl ether ND 0.50 " <br /> Ten-arnyl methyl ether ND 0.50 " <br /> Ethanol ND 50 " <br /> 1,2-Dichloroethane ND 0.50 " <br /> Ethylene dibromide ND 0.50 " <br /> Surrogate,1,2-DC4-d4 23.4 25.0 93.6 60-140 <br /> gakCS(2020275-BSI) Prepared&Analyzed:02/26/02 <br /> ethyl tent-butyl ether 26.5 0.50 ugA 25.0 106 60-140 <br /> Surrogate:1,2-DCA-d4 20.8 25.0 83.2 60-140 <br /> Matrix Spike(2020Z75-MS1) Source:5202312-09 Prepared&Analyzed:02/26/02 <br /> Methyl tart-butyl ether 21.9 0.50 ugA 25.0 ND 87.6 60-140 <br /> Surrogate: 1,2-DCA-d4 21.2 25.0 84.8 60-140 <br /> Matrix Spike Dup(2020275-MSD1) Source:S202312-09 Prepared&Analyzed:02/26/02 <br /> Methyl tert-butyl ether 20.8 0.50 ug/l 25.0 ND 83.2 60-140 5.15 25 <br /> Surrogate:1,2 DCA-d4 20.3 25.0 81.2 60-140 <br /> Batch 2020279-EPA 5030B [PM <br /> Blank(2020279-BLKI) Prepared&Analyzed:02/25/02 <br /> Tert-butyl alcohol ND 5.0 ugA <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 /> Ethanol ND 50 " <br /> 1,2-Dichloroethanc ND 0.50 " <br /> Ethylene dibrorttide ND 0.50 " <br /> Surrogate:1,2-DCA-d4 24.4 25.0 97.6 60-140 <br /> Amh <br /> mWSequoia 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 entirely. <br /> Page 12 of 15 <br />