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919 SinkerAvenue 5593 R <br /> Sequoia Sacramrarn ento CA 45934 <br /> `3 (9161 921 9600 <br /> Analytical FAX(916)921.0100 <br /> www sequoialabs com <br /> ATC Associa(es Inc -Modesto Project Diesel Performance <br /> It 17 Lone Palm Ave,Ste B Ptalect Nu-her 54 62577 0001 Reported <br /> Modesto CA,95351 Pmjmt fig- Jeanne Hornsey 12/27/01 16 44 <br /> ' Volatile Organic Compounds by EPA Method 8260B-Quality Control - <br /> Sequoia Analytical-Walnut Creek <br /> ' Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units level Result %REC Limits RPD Limit Nate <br /> Batch 1L20012-EPA 50308(PIF) <br /> Blank(IL200_12-BLKI) _ Prepared&Analyzed 12/20/01 <br /> tert-Butyl alcohol ND 20 mg/ml Air <br /> Methyl tert-butyl ether(MTBE) ND 050 " <br /> ' D1 isopropyl ether ND 050 <br /> Ethyl tert-butyl ether ND 050 <br /> tent-Amyl methyi ether ND 050 <br /> Surrogate Dihromnfluoromeihane 512 N 500 101 54-150 <br /> Surrogate I 1-Dichloraethane44 566 500 113 50-150 <br /> LCS(IL20012-RS1) Prepared&Analyzed 12/20/01 <br /> ' Methyl cert-butyl ether(MTBE) 41 5 0 50 mg/ml Air 500 83 70-130 <br /> Surrogate Dibromei luommethane 502 500 100 50-150 <br /> Surrogate 12-Dichlometharre-d4 56 1 500 111 50-150 <br /> �LCS Dup(IL20012-BSDI) Prepared&Analyzed 12120/01 <br /> Methyl tent-butyl ether(MTBE) 452 0 50 mg/ml Air Soo 90 70-130 9 25 <br /> Surrogate Dihrnmofluoramethane 508 Soo 101 50-150 <br /> Surrogate 12-Diehlomethane-d4 52 9 30 0 106 50-150 <br /> l <br /> ' Sequoia Analytical-Sacramento The results in this report apply to the samples analvzed in accordance with the chain <br /> of custody document Thie analytical report must he reproduced in av entirety <br /> Page Page 7 of 8 <br />