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i <br /> L : <br /> 680 Chesapeake Drive Redwood City.CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 6) Sequoia 404 N.Wiget Lane Walnut Creek.CA 94598 (925)988-9600 FAX(925)988-9673 <br /> X11,) Analytical 819 Striker Avenue.Suite 6 Sacramento,CA 95834` (9t6)921-9600 FAX(916)921-0100 <br /> L1455 McDowell Blvd.North,Ste.D. Petaluma.CA 94954 (707)792-1865 FAX(707)792-0342 <br /> LKleinfelder-Stockton Project: N/A Sampled: 10121198 <br /> 2825 East Myrtle Street Project Number: 20-2864-02.E02 Received: 10/23/98 <br /> Stockton,CA 95205 Project Manager: Tony Martin Reported: 11/10/98 <br /> LVolatile Organic Compounds by EPA Method 8260A/Quality Control, <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit .Recov. RPD RPT] <br /> Analyte Analyzed Level Result Result Units Recov, Limits % Limit % Notes* <br /> Batch: 8110053 Date Prepared: 1114198 E.xtrartinn Method: EPA 5030B[McOI31 <br /> mark 8110053-BLK1 <br /> Ethanol i 114198 IND mg/kg 150 <br /> Tert-butyl alcohol ND 10.0 <br /> Methyl Cert-butyl ether IND 0.100 <br /> Di-isopropyl ether IND 4.100 <br /> Ethyl tert-butyl ether IND 0.100 <br /> Tert-amyl methyl ether IND 0.100 <br /> Surrogate: 1,2-DCA-d4 2.50 2.17 60.0-140 86.8 <br /> 1_CS 8110053-BSI <br /> Methyl tert-butyl ether 1'1/4/98 2.50 1.92 mg/kg 70.0-130 76.8 <br /> Surrogate: 1,2-DCA-d4 2.50 2.30 60.0-140 92.0 <br /> LMatrix S iikke 8110053-N'IS1 HI-Q778-07 <br /> Methyl tert-butyl ether 11/3/98 2.50 ND 2.89 mg/kg 60.0-140 116 <br /> Surrogate: 1,2-DCA44 2.50 2.16 60.0-140 90.4 <br /> LMatrix Spike Dao 8I10053-MSDI 5810278-07 <br /> Methyl tert-butyl ether 1113198 2.50 ND 2.19 mg/kg 60.0-140 87.6 30.0 27.9 <br /> Surrogate: 1,2-DCA-d4 1.50 1.40 60.0-140 96.0 <br /> LBat�h: 8110.090, Dite Prepared: 11/2/98 Extraction Method: EPA 50308 [Me011l <br /> Blank .8110090-BLKI <br /> Ethanol 1113198 IND mg/kg 150 <br /> LTert-butyl alcohol IND 10,0 <br /> Methyl ten-butyl ether ND 0.100 <br /> Di-isopropyl ether IND 0.100 <br /> Ethyl ter,-butyl ether ND " 0.100 <br /> Tert-amyl methyl ether ND 0.100 <br /> Surrogate: 1,2-DCA-d4 2.50 2.32 60.0-140 92.8 <br /> LS,T 8110090-BSI <br /> Methyl tent-butyl ether 1113198 2.50 2.18 mg/kg 70.0-130 87.2 <br /> Surrogate: 1,2-DCA-d4 1 2.50 2.37 60.0-140 94.8 <br /> Matrix Spike U1091MS_1 5810215-01 <br /> Methyl tert-butyl ether 10/28/98 2.50 0.585 3.22 mg/kg 60.0-140 105 <br /> Surrogate: 1,2-DCA-d4 1, 2.50 2.57 60.0-140 103 <br /> LMitrix Spike Dun 8110090-MSDI S810215-01 <br /> Methyl tent-butyl ether 10/28/98 2.50 0.585 2.85 mg/kg 60.0-140 90.6 25.0 14.7 <br /> 4indaC. <br /> lytical-Sacramento *Refer to end of report for text of notes and definitions. <br /> hneider, Laboratory Director Page 8 of 10 <br />