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• Sequoia680 Chesapeake Drive Redwood City,CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical $19 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 96W FAX(916)921 0100 <br /> low <br /> Upgradient Environmental Consultants Project Conrady Sampled 4124/98 <br /> 336 Augusta Court Project Number N/A Received 4/24/98 <br /> Valley S ,CA 95252 Project Manager Vic Cherven Reported 5/13198 , <br /> Volatile Organic Compounds by EPA Method 8260A/Quality Control <br /> Sequoia Analytical-Sacramento <br /> Date Splice Sample QC Reporting Limit Recov RPD RPD <br /> Anal to <br /> Analyzed Level Result Result Units Recov Limits % Limit % Notes*i <br /> 111ank(continued) 8050077-BLKI <br /> Ethyl tent-butyl ether 5/5/98 ND ug/l 200 <br /> Tert-amyl methyl ether 1. ND 200 <br /> LC5 8050077-BS1 <br /> Methyl tert-butyl ether 5/5/98 500 48 7 ug/1 700-130 974 <br /> Matrix Spike 8050077-MSI S804222-00 <br /> Methyl tert-butyl ether 4/30198 500 ND 387 ug/I 600-140 774 <br /> Mat2lxSpike Dun 8050077-MSDI S804222-00 <br /> Methyl tert-butyl ether 4/30198 500 ND 47 6 u8/1 600-140 95 2 250 206 <br /> Sequoia PAL -Sacramento *Refer to end of report for text of notes and definitions <br /> 0 nda C Schneider,Laboratory Director Page 9 of 10 <br />