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a <br /> sequoia C iesapeake Drive Redwood City, CA 94 ' (650) 364-9600 FAX (650) 364-9233 <br /> 4U, ,I. Wiget Lane Walnut Creek. CA 945 .., (925) 988-9600 FAX (925) 988-9673 <br /> I 819 Striker Avenue, Suite 8 Sacramento, CA 95834 (9 16) 921 -9600 FAX (916) 921 -0 100 <br /> v4w Analytical 1455 McDowell Blvd. North, Ste, D Petaluma, CA 94954 (707) 792-1865 FAX (707) 792-0342 <br /> 1551 Industrial (toad San Carlos, CA 94070-4111 (650) 232-9600 FAX (650) 232-9612 <br /> Gettler-Ryan - Sac Project: Chevron 9-3232, Stockton, CA Sampled: 5/5/99 to 5/60'99 <br /> 3164 Gold Camp Dr., Ste. 240 Project Number: 346463 .04 Received: 5/7/99 <br /> Rancho Cordova, CA 95670 Project Manager: Rick Fears Reported: 5/ 14, 19/99 <br /> Volatile Oxygenate 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 /> BH-1A-50' 5905112-01 Sall <br /> Tert-butyl alcohol 9050176 5/ 17/99 5/ 17/99 10.0 ND mg/kg <br /> Methyl tert-butyl ether It Itit0. ) 00 ND It <br /> Di-isopropyl ether It " 110. 100 ND It <br /> Ethyl tert-butyl ether It IFit0. 100 ND " <br /> Tert-amyl methyl ether It " If0. 100 ND " <br /> Ethanol IF " It150 ND It <br /> Surrogate: 1,2-DCA -d4 " IF It 60. 0-140 91. 6 <br /> BH-2-30' 5905112-10 8211 <br /> Tert-butyl alcohol 9050176 5/ 17/99 5/17/99 10.0 ND mg/kg <br /> Methyl tert-butyl ether If " if0. 100 ND " <br /> Di-isopropyl ether It IF110. 100 ND " <br /> Ethyl tert-butyl ether It " 100. 100 ND " <br /> Tert-amyl methyl ether It " It0. 100 ND " <br /> Ethanol It IF IF 150 ND " <br /> Surrogate: 1,2-DCA-d4 to 60. 0-140 87. 6 <br /> BH-3-30' 5905112-22 5211 <br /> Tert-butyl alcohol 9050173 5/14/99 5/ 18/99 10.0 ND mg/kg <br /> Methyl tert-butyl ether It 0. 100 ND It <br /> Di-isopropyl ether 0. 100 ND It <br /> Ethyl tert-butyl ether IF " 0. 100 ND " <br /> Tert-amyl methyl ether " " 0. 100 ND " <br /> Ethanol It " 150 ND " <br /> Surrogate: 1, 2-DCA-d4 It it 60. 0- 140 83, 6 % <br /> BFI-4-50' 5905112-40 S2 <br /> Ten-butyl alcohol 9050176 5/ 17/99 5/ 17/99 10.0 ND mg/kg <br /> Methyl tert-butyl ether It it „ 0.. 1.00 ND " <br /> Di-isopropyl ether It " 0. 100 ND " <br /> Ethyl tert-butyl ether IF 0. 100 ND " <br /> Tert-amyl methyl ether It IF 0. 100 ND it <br /> Ethanol 1 150 ND " <br /> Surrogate: 1,2-DCA-d4 to 60. 0- 140 88.4 <br /> Sequoia Analytical - Sacramento *Refer to end of report for text of notes and definitions. <br /> 7C1 <br /> Sandra R. Hanson, Client Services Representative Page 8 of IS <br />