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• I <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650) 364 9233 <br /> 404 N Wiget lane Walnut Creek CA 94598 (925)988 9600 FAX(925)988 9673 <br /> Analytical 5Avenue Suite$ Sacramento CA 95834 (916)991 9600 FAX(916)991 0100 <br /> 145McDowell <br /> f <br /> 1455 McDowell Blvd North Ste p Petaluma CA 94954 (707)792 ]865 FAX(707)792 0342 <br /> EMCON-Sac Project ARCO 2168,Stockton,CA Sampled 8112/98 <br /> 1433 N Market Blvd Project Number 2231200 Received 8/13/98 <br /> Sacramento,CA 95834 Project Manager Dave Foley Reported 8/31/98 <br /> Volatile Organic Compounds by EPA Method 8260A <br /> Sequoia Analytical-Sacramento <br /> Batch Date Date Surrogate Reporting <br /> Analyte Number Prepared Analyzed Limits Limit Result Units Notes* <br /> dW-1 (53') <br /> S808136-41 Wator <br />"ert-butyl alcohol 8080280 8126198 8/26/98 200 ND ug/I <br /> Methyl cert-butyl ether 2 00 ND " <br />)i-isopropyl ether 200 ND " <br /> thyl tent-butyl ether 200 ND " <br /> ert-amyl methyl ether 200 ND " <br /> arrogate 12-DCA-d4 600-140 940 <br /> JW-2(52-) 5808136-42 Wate <br /> ert-butyl alcohol 8080280 8/26/98 8126198 200 ND ug/l <br /> 4ethyl tert-butyl ether 200 ND " <br />�l- pyl ether 200 ND " <br /> th butyl ether 200 ND <br /> ert-amyl methyl ether 200 ND <br /> arrogate 1 2-DCA-d4 600-140 876 <br /> IW-3(53') 5898136-03 <br /> -iter <br /> ert-butyl alcohol 8080280 8126/98 8/26198 2000 ND ug/l 2,D <br /> ethyl tert-butyl ether 200 ND 2,D <br /> i-isopropyl ether 200 ND 2,p <br /> hyl tert-butyl ether " 200 ND 2,D <br /> rt-amyl methyl ether " " 200 ND 2,D <br /> rrogate ! 2-DCA-d4 600 140 105 <br /> W-4(58') S808136-04 <br /> Water <br /> rt-butyl alcohol 8080280 8/26/98 8/26/98 2000 ND ug/I 2,D <br /> ethyl tert-butyl ether " 200 ND 2,D <br />-isopropyl ether 200 ND 2,D <br /> hyl tent-butyl ether 200 ND 2,D <br /> rt-amyl methyl ether 200 ND 2,13 <br /> rrogate 1 2-DCA-d4 " <br /> 600-140 960 <br /> W5(54'} <br /> Water <br /> rt-butyl alcohol 8080280 8/26/98 8/26/98 2000 ND ug/l 2,13 <br /> thyl tert-butyl ether " " 200 ND „ 2,D <br /> iso I ether 200 ND " 2,D <br /> iyl(Wtyl ether " 200 ND 2,D <br /> quota Analytical -Sacramento *Refer to end of report for text of notes and definitions <br /> tald W Bobel,Client Services Repre entative Page 4 of 10 <br />