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A— :hesdneake Drive Redwood City,CA 4, (650)Y364-9600 FAX(450)3G4 9233 <br /> Sequoia 404 N.Wiget Lane Walnut Creek.CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue.Suite 8 Sacramento,CA 95834 (916)921-9600 FAX(916)9 21-0100 <br /> 1455 McDowell Blvd.North,Ste. D Petaluma,CA 94954 (707) 792-1865 FAX(707) 792-0342 <br /> Analytical <br /> 1551 Industrial Road San Carlos,CA 94070-41 l 1 (650)232-9600 FAX(650) Z32-9612 <br /> Cambria Environmental Project: EQUILON, 1313 E.Charter Way, Stockton,CA Sampled: 4129199 <br /> a <br /> Pro ect Number: NIA Received: 4129199 j <br /> 270 Perkins Street Reported: 514, 7199 <br /> Sonoma,CA 95476 Project Manager: Aubrey Cool <br /> N <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 /> i <br /> Batch- 2059L <br /> Date epared: 5/4199 <br /> Blank 42 2%Up4E- LK1 10.0 <br /> Tert-butyl alcohol 5/6199 ND mg/kg <br /> ND 0.100 <br /> Methyi tert-butyl ether <br /> ND 0.100 <br /> Di-isopropyl ether <br /> ND 0.100 <br /> Ethyl tert-butyl ether <br /> Tert-amyl methyl ether ND 0.100 <br /> Surrogate: 1,2-DCA44 2.50 239 60.0-140 95.6 <br /> 1.�C.S 9{150049-SS L <br /> Methyl tert-butyl ether 5/6/99 2.50 2.82 mg/kg 70.0-130 113 <br /> Surrogate: 1,2-DCA-d4 2.50 2.79 60"0-140 112 <br /> Matrix Sp_i!s 9050949-MSI 5904402-01 <br /> Methyl tert-butyl ether 5/6199 2.50 ND 2.71 mg/kg 60.0-140 108 <br /> Surrogate: 1.2-DCA-d4 11 2.50 2.63 60.D-140 105 <br /> Ma rix Spoke 12un a - <br /> MSDI S904492-01 Methyl tert-butyl ether 5/6/99 2.50 ND 2.55 mg/kg 60.0 140 102 25.0 5.71 <br /> Surrogate: 1,2-DCA-d4 2.50 1.53 60.0-140 101 <br /> *Refer-to end of report for test of motes and defaniriorts <br /> Sequoia Analytical Sacramento <br /> page 14 of I <br /> Sandra R. Hanson,Client Services Representative <br />