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885 Jarvis Drive <br /> Sequoia Morgan Hill,CA 95037 <br /> (408)776-9600 <br /> FAX(408)782-6308 <br /> Analytical www.sectuoialabs.com <br /> ATC Associates, Inc.-Modesto Project: ATC <br /> 1117 Lone Palm Avenue Project Number: SUSD Stagg 1-1S 54.17292.0002 Reported: <br /> Modesto CA,95351-1502 Project Manager: Tom Lutterman 03/29/00 10:30 <br /> Volatile Organic Oxygenated Compounds by EPA Method 8260A - Quality Control <br /> Sequoia Analytical - San Carlos <br /> Reporting Spike Source %PEC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 0030122- EPA 5030B [P/Tl - <br /> LCS(0030122-BS2) Prepared&Analyzed: 03/23/00 <br /> Methyl tert-butyJ ether 47.8 2.00 ugli 50.0 95.6 70.0-130 <br /> Surrogate: 1,2-Dichloroethane-d4 49.9 50.0 99.8 76.0-114 <br /> LCS(0030122-1853) _ Prepared&Analyzed: 03/24/00 _ <br /> Methyl tert-butyl ether 44.0 2.00 ug/1 50.0 88.0 70.0-130 <br /> Surrogate: l,2-Dichloroerhane-d4 48.9 50.0 97.8 76.0-114 <br /> Matrix Spike(0030122-MSI) Source: L003204-02 Prepared&Analyzed: 03/23/00 _- <br /> Methyl tert-butyl ether 40.6 2.00 ug/l 50.0 ND 81.2 60.0-140 <br /> Surrogate: 1,2-Dichloroethane-d4 44.0 1150.0 88.0 76.0-114 <br /> Wtrix Spike Dup(0030122-MSD1) Source: L003204-02 Prepared&Analyzed: 03/23/00 <br /> ,yl tert-butyl ether_ 42.6 2.00_ ug/1 50.0 ND 85.2 60.0-140 4.81 25.0__ <br /> Surrogate: l,2-Dichloroethane-d4 44.9 50.0 89.8 76.0-114 <br /> oia Analytical - Morgan Hill The results in this report apply to the samples analy_ed in accordance with the chain of <br /> custody document. This analytical report must he reproduced in its entirety. <br /> Page 6 of 7 <br />