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Sequoia 680 Chesapeake Drove Redwood City CA 94063 (650) 364-9600 FAX(650) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (9Z5)988 9600 FAX(925)988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921 9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707) 792-1865 FAX(707)792 0342 <br /> 1 <br /> EMCON-Sac Project Don Rogers Sampled 8/12/98 <br /> 1433 N Market Blvd Project Number 22613-100 001 Received 8/13/98 <br /> Sacramento,CA 95834 Project Manager Deanna Santos Reported 8/31/98 <br /> Volatile Organic Compounds 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 % motes* <br /> Balch. 8080279 Date I!roared, 8/25/98 Extractign Method, EPA 5030B [PtTi <br /> ILULk <br /> 3thanol 8/28/98 IND ug/I 3000 <br /> Pert-butyl alcohol ND 200 <br /> Methyl tert-butyl ether " ND 2 00 <br />)h-isopropyl ether ND 2 00 <br />.thyl tert-butyl ether " ND 2 00 <br /> Iert-amyl methyl ether ND 2 00 <br /> urrogate 1 2-DCA-d4 <br /> 500 476 600-140 952 <br /> $Q80279-BS] <br /> lethyl Cert-butyl ether 8/28/98 500 604 ug/I 700-130 121 <br /> urrogate 1 2-DCA-d4 11 500 582 600-140 116 <br /> 8080279-BSZ <br /> 1 tert-butyl ether 8/12/98 500 525 ug/I 700-130 105 <br /> urrogate 1,2-DCA-d4 1, 500 44 7 600-140 894 <br /> CS Dun 8080279-BSD2 <br />[ethyl tert-butyl ether 8/12/98 500 478 ug/I 700-130 956 300 937 <br /> errogate 1 2-DCA-d4 500 429 600-140 85 8 <br /> luo Analytical -Sacramento *Refer to end of report for text of notes and definitions <br /> Zald W Bobel, Client Services Representative Page 5 of 6 <br />