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819 Striker Avenue,Suite 8 <br /> Sequoia Sacramento, 95834 <br /> 4 <br /> ID (9l 6)92 921-9600 <br /> Analytical FAX(916)921-0100 <br /> FAX <br /> WF <br /> SECOR International-Rancho Cordova Project: ARCO 4493, Stockton,CA Sampled: 518100 <br /> 3017 Kilgore Road,Suite 100 Project Number: NIA Received: 5110/00 <br /> Rancho Cordova,CA 95670 Project Manager-. Ru Benkosky Reported: 5/18100 <br /> Volatile Oxygenate Compounds by EPA Method 8260A/Quality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov. RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov. Limits % Limit % Notes* <br /> Batch: 0050147 Date Prepared: 5112/00 Extraction Method: EPA 5030E [MeOHI <br /> Blank 0050147-BLKI <br />"Cert-butyl alcohol 5112/00 ND mg/kg I0.0 <br /> Methyl tert-butyl ether I. ND 0.100 <br /> Di-isopropyl ether ND 0.100 <br /> Ethyl tert-butyl ether ND 0.100 <br /> Tert-amyl methyl ether ND 0.100 <br /> Ethanol ND 150 <br /> 1,2-Dichloroethane ND 0.100 <br /> Ethylene dibromide _ ND_ "_ 0.100 <br /> �_ <br /> Surrogate: 1,2-DCA-d4 2.50 2.27 60.0-140 90.$ <br /> SCS 0050147-BSI <br /> Methyl tert-butyl ether 5112/00 2.50 2.24 mg/kg 70.0-13_0 89.6 <br /> S te: 1,2-DCA-d4 112.50 2.33 60.0-140 93.2 <br /> Matrix Spike 0050147-MSI S005157-25 <br /> Methyl tert-butyl ether 5/12/00 2.50 ND 2.19 mg/kg 60.0-140 87.6 <br /> Surrogate: 1,2-DCA-d4 of2.50 2.48 60.0-140 99.2 <br /> Matrix Spike Dun 0050147-MSDI S005157-25 <br /> Methyl tert-butyl ether 5112/00 2.50 ND 2.23 mg/kg 60.0-140 89.2 25,0 1.81 <br /> Surrogate: 1,2-DCA-d4 a 2.50 2.64 H60.0-140 106 <br /> Bitch: QMLb3 pate Prepared: 5/15/00 Extraction Method: EPA 5030B T/Tl <br /> Mink 0050163-BLKI <br /> Tert-butyl alcohol 5/15/00 ND u9/1 200 <br /> Methyl tert-butyl ether ND 2.00 <br /> Di-isopropyl ether ND 2.00 <br /> Ethyl tert-butyl ether " ND 2.00 <br /> Tort-amyl methyl ether ND 2.00 <br /> Ethanol ND 3000 <br /> 1,2-Dichloroethatte ND 2.00 <br /> Ethylene dibromide ND 2.00 <br /> Surrogate: 1,2-DCA-d4 50.0 56.8 60.0-140 114 <br /> lank 0050163-BLK2 <br /> Tert-butyl alcohol 5116100 ND ug/l 200 <br /> Methyl tert-butyl ether ND 2.00 <br /> Di-isopropyl ether ND 2.00 <br /> Ethyl tert-butyl ether ND 2.00 <br /> T*YI methyl ether ND 2.00 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and def nitions. <br /> Page 20 of 22 <br /> li <br />