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r <br /> Lz 68LTGhesapeake Drive Redwood City,CA 943 (650)364-9600 fAX(650)364-9233 <br /> 4!D- 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)921-0100 <br /> Analytical 1455 McDowell Blvd.North.Ste,D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Kletnfelder Stockton Pro�ect� N/A Sampled: 10/20/98 <br /> 2825 East Myrtle Street Project Number: 20-2864-02.E02 Received: 10/23/98 <br /> Stockton,CA 95205 Project Manager: Tony Martin Reported: 11/9/98 <br /> LVolatile Organic Colnpounds 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, 8110038 Date Pre�lar�d: 1 J,/,//99$ Extraction Metliod: EPA 50308 [i17eOHl <br /> Blank 8110038-13LiK11 <br /> Ethanol 11/4198 ND mg/kg 150 <br /> Tert-butyl alcohol ND 10.0 <br /> Methyl tort-butyl ether ND 0.100 <br /> Di-isopropyl ether ND 0.100 <br /> Ethyl tert-butyl ether ND 0.100 <br /> LTert-amyl methyl ether ND 0.100 <br /> Surrogate: 1,2-DCA-d4 2.50 2.88 60.0-140 115 <br /> L-C" 8110038-BS1 <br /> Methyl tert-butyl ether 11/4/98 2.50 2.10 mg/kg 70.0-130 84.0 <br /> Surrogate: 1,2-DCA-d4 2.50 2.66 60.0-140 106 <br /> LMatrix Spike 8110038-MSI SS10278-07 <br /> Methyl tort-butyl ether 11/4/98 2.50 ND 2.89 mg/kg 60.0-140 116 <br /> Surrogate: 1,2-DCA-d4 1 2.50 2.26 60.0-140 90.4 <br /> Matrix Spike Dun $1._10038-M512/ S810278-07 <br /> Methyl tert-butyl ether 11/4/98 2.50 ND 2.19 mg/kg 60.0-140 87.6 30.0 27.9 <br /> Surrogate. 1,2-DCA-d4 2.50 2.40 " 60.0-140 96.0 <br /> L Blank Batch: 8110076 Date Prepared: 112/98 Extraction Method: EPA 5030B [MeOHI <br /> 8110076-BLKI <br /> Ethanol 11/2/98 ND mg/kg 150 <br /> Tert-butyl alcohol ND 10.0 <br /> Methyl tert-butyl ether ND 0.100 <br /> Di-isopropyl ether ND 0.100 <br /> LEthyl Cert-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 /> L1SS $1101]!-BSf <br /> Methyl tert-butyl ether 11/2/98 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 94.6 <br /> Matrix Spike $11 0076-N1S1 S810215-01 <br /> Methyl tent-butyl ether 11/2/98 2.50 0.585 3.22 mg/kg 60.0-140 105 <br /> Surrogate: 1,2-DCA-d4 11 2.50 1.44 60.0-140 97.6 <br /> Matrix Spike Dup 8110076-MSDI 5810215-01 <br /> Methyl tert-butyl ether 11/2/98 2:50 0.585 2.85 mg/kg 60.0-140 90.6 25.0 14.7 <br /> Sequoia alytical-Sacramento *Refer to end ofreport for text ofnotes and definitions. <br /> L , <br /> 1 <br /> Ta C. Schneider,Laboratory Director Page 7 of 9 <br />