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Mar-02-99 11 : 14A Pinnacle/EMCON 4'. io <br /> r <br /> 660 Chesapeake Drive Redwood City,CA 94063 (650)364-9600 FAX(650)364-9233 <br /> A \ Sequoia qpd h€.vVlget lane Walnut Creek.CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 40 Striker Avenue,Suite 8 Sacramento,C4 95834 (916192,1-9600 FAX(916)021-0100 <br /> Analytical 1455 McDovwetl Blvd.North.Ste.D Petaluma.CA 94954 (707)792-1$65 FAX(707)792.0342 <br /> Pinnacle-C.P. Project: Arco 548,Stockton,CA Sampled: 10/26/98 to 10/27/98 <br /> 3939 Cambridge Road,Ste. 220 Project Number: NIA Received: 10/28/98 <br /> Cameron Park,CA 95682 Prosect Manage-- Mark CinnS Re orte& 1 Ill 1198 <br /> Volatile Organic Compounds by EPA Method-,8260A <br /> Sequoia Analytical-Sacramento <br /> Batch Date Date Surrogate Reporting <br /> lAnalyte Number Prepared Analyzed Limits Limit Result Units Notes.] <br /> 5810323-10 St2i1, <br /> Teri-butyl alcohol 8110105 1119198 1119/98 10.0 ND mg/ltg <br /> Methyl tert-butyl ether " " 0.100 0.410 <br /> Di-isopropyl ether 0.100 ND <br /> Ethyl ten-butyl ether 0.100 ND " <br /> Tert-amyl methyl ether 0.100 ND <br /> Surrogate- 1,2-DCA44 d0.0--140 118 % <br /> AS-3146.5] S810323-11 sail <br /> 4 Ethanol 8110105 1119/98 1119198 150 ND mg/kg <br /> Teti-butyl alcohol 10.0 ND " <br /> Methyl tert-butyl ether 0.100 ND " <br /> Di-isopropyl ether 0,100 ND " <br /> Ethyl tert-butyl elhcr 0.100 ND <br /> Tert-amyl methyl ether 0.100 ND <br /> Surrogate: 1,2-DCR44 60.0-140 NR % 3 <br /> AS-3(6b�51 5810323-12 5411 <br /> Ethanol 8t10105 1119198 11/9198 150 ND mg/kg <br /> Tert-butyl alcohol 10.0 ND " <br /> Methyl tort-butyl ether 0.100 ND <br /> Di-isopropyl ether 6.100 ND <br /> Ethyl tent-butyl ether 0.100 ND <br /> Tert-aroyl methyl ether 0.100 ND <br /> Surrogale: 1,2-DCA-d4 60.0-140 64.8 % <br /> a <br /> A <br /> iI <br /> Sequoia Analytical-Sacramento *Refer rd end of report far text of notes and defini ions. <br /> Page 7 of 12 <br /> Ronald W Hobe],Client Services Repre ntative <br />