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419 Stoker AvenueSuite 4 <br /> Sequoia Sacramento953 LA 95333 <br /> (916)921-96o0 <br /> Analytical FAY(916)921 0100 <br /> www sequotalabs Lam <br /> ' ATC Associates Inc -Modesto Project Pacific Coast Rec <br /> 1117 Lone Palm Ave,Ste B Project Number 54 16393 0002 Reported <br /> Modesto CA 95351 Project Manager Drew Van Allen 01/02/02 12 08 <br /> Volatile Organic Compounds by EPA Method 8260B-Quality Control <br /> Sequoia Analytical- Walnut Creek <br />' Reporting Spike Source %REC RPD <br /> Analyte Result 1-milt Units Level Result %REC Limits RPD Limit Nates <br />' Batch 1L20012-EPA 5030B(PM — <br /> Blank(1L20012-BLKI) Prepared&Analyzed 12/20/01 <br /> Ethanol ND X00 mg/ml Air <br /> ten-Butyl alcohol ND 50 <br /> Methyl tert butyl ether(MTBE) ND 2 0 <br /> DI-isopropyl ether NO 2 0 <br /> Ethyltert-butylether ND 2 0 " <br />' tert-Amyl methyl ether ND 2 0 I' <br /> 1 2 Dichloroethane NO 2 0 <br /> Ethylene dibromide NO 20 <br /> Surrogate Dtbromofluoromethane 512 500 102 50-150 <br /> Surrogate 1 2-Dichloroethane-d4 56 6 500 113 50-150 <br /> LCS(1L20012-13SI) Prepared&Analyzed 12/20/01 <br /> Methyl tert-butyl ether(MTBE) 41 5 2 0 mg/ml Air Soo 83 70-130 <br /> urrogate Dtbromofluoromethane 502 50 0 100 50-150 <br /> Surrogate 1 2-Dichloroethane d4 56 1 500 111 50-150 <br />' LCS Dup(1L20012-BSD1) Prepared&Analyzed 12/20/01 <br /> Methyl tert-butyl ether(MTBE) 45 2 2 0 mg/ml Air 500 90 70-130 9 200 <br /> Surrogate Dtbromofluoromethane 508 500 102 50-150 <br /> Surrogate 11-Dichloroethane d4 529 500 106 50-150 - <br /> Sequoia Analytical-Sacramento The resulls to this report apply to the samples analyzed to accordance with the chain <br /> of custody document This analytical report must be reproduced to its entirety <br /> Page Page 7 of 8 <br />