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l <br /> l <br /> Sequoia [��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 /> 819 Striker Avenue,Suite 8 Sacramentd,!CA 95834 (916}921-9600 FAX(916)921-0100 <br /> Analytical 1455 McDowell Blvd.North,Ste.D Petaluma.CA 94954 (707)792-1865 FAX(707) 7,92-0342 <br /> 1551 Industrial Road San Carlos,!CA 94070-41 1.1 (650)232-9600 FAX(650}732-9612 <br /> r n <br /> Pinnacle-C.P. Project: ARCO,5469, Stockton CA Sampled: 2/11/99 <br /> ' 3939 Cambridge Road,Ste.220 Project Number: NIA Received: 2/12/99 <br /> Cameron Park, CA 95682 Project Manager: Mark Capps Reported: 311199 <br /> 'Volatile Organic Compounds by EPA Method 8260A <br /> Sequoia Analytical - Sacrarnento " <br /> Batch Date 'Date Surrogate Reporting <br /> Analyte Number Prepared Analyzed Limits Limit Result Units Notes* <br /> P-L--5S902174-05 SQiI <br /> Tert-amyl methyl ether 9020206 2/17/99 2/17/99 0.100 ND mg/kg <br /> Surrogate., 1,2-DCA-d460.0-140 94.8 % <br /> PL-6 14'1 5902174-06 S9J1 <br /> Tert-butyl alcohol 9020206 2/17/99 2117/99. 10.0 ND mg/kg <br /> Methyl tert-butyl ether 0.100 ND " <br /> Di-isopropyl ether 0.100 ND <br /> Ethyl tert-butyl ether g 0.100 ND " <br /> ' Tert-amyl methyl ether 0.100 ND " <br /> Surrogate: 1,2-DCA44 60.07140 100 % <br /> ' 15902174-07. SAW <br /> Tert-butyl alcohol 9020206 2/17/99 2117199 10.0 ND mg/kg <br /> Methyl tert-butyl ether 0.100 4.31 " <br /> Di-isopropyl ether 0.100 ND " <br /> Ethyl cert-butyl ether 0.100 NID " <br /> Tert-amyl methyl ether " 0.100 ND " <br /> Surrogate: 1,2-DCA-d4 60.0-140 94:4 <br /> 'Pt, (4' 5902124-08Ssil <br /> Tert-butyl alcohol 9020206 2/17/99 2/17/99 10.0 ND mg/kg <br /> iMethy[tert-butyl ether 0.100 4.33 " <br /> tDi-isopropyl ether <br /> 0.100 ND " <br /> :Ethyl tert-butyl ether 0.100 ND " <br />''Tert-amyl methyl ether 0.100 ND " <br /> Surrogate: 1,2-DCA-d4 " 60.0-140 104 % <br /> RL-9(4) 5902174-09 <br /> SAW <br /> Tert-butyl alcohol 9020206 2117199 2117199 <br /> 10.0 ND mg/kg <br /> Methyl tert-butyl ether 0.100 ND " <br /> Di-isopropyl ether ". 0.100 ND " <br /> Ethyl tert-butyl ether 0.100 ND " <br /> Tert-amyl methyl ether :r 0.100 ND " <br /> 'Surrogate: 1,2-DCA-d4 60.0-140` 97.6 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of pores and def nitions. <br /> Ronald W. Bobel,Client Services Representative Page$of 15 <br /> t <br />