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Sequoia 1455 McDowell Blvd. North, Ste. D <br /> ` Petaluma, CA 94954 <br /> (707) 792-1865 <br /> Analytical FAX (707) 792-0342 <br /> Cambria Environmental Project: Shell Oil Co. Sampled: 8/11/99 to 8/12/99 <br /> 270 Perkins St. Project Number: 440 W Charter,Stockton Received: 8/13/99 <br /> Sonoma,CA 95476 Project Manager: Aubrey Cool Reported: 8/20/99 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical-Petaluma <br /> Batch Date Date Surrogate Reporting <br /> Analyte Number Prepared Analyzed Limits Limit Result Units Notes* <br /> T6-N-25.0' P908378-01 Soil <br /> Tert-amyl methyl ether 9080470 8/19/99 8/19/99 0.00500 ND mg/kg <br /> Tert-butyl alcohol 0.100 ND " <br /> Di-isopropyl ether 0.00500 ND " <br /> Ethyl tert-butyl ether 0.00500 ND " <br /> Methyl tert-butyl ether 0.00500 ND " <br /> Surrogate: Dibromofluoromethane 80.0-120 96.6 % <br /> Surrogate: 1,1-Dichloroethane-d4 80.0-120 92.1 11 <br /> Surrogate: Toluene-d8 81.0-117 99.0 <br /> Surrogate: 4-Bromofluorobenzene 74.0-121 96.6 <br /> T6-S-25.0' P908378-02 soil <br /> Tert-amyl methyl ether 9080470 8/19/99 8/19/99 0.00500 ND m+'-k'L, <br /> Tert-butyl alcohol 0.100 ND " <br /> Di-isopropyl ether 0.00500 ND " <br /> Ethyl tert-butyl ether 0.00500 ND " <br /> Methyl tert-butyl ether 0.00500 ND " <br /> Surrogate: Dibromofluoromethane 80.0-110 93.4 % <br /> Surrogate: 1,2-Dichloroethane-d4 80.0-120 93.4 <br /> Surrogate: Toluene-d8 81.0-117 97.2 <br /> Surrogate: 4-Bromofluorobenzene 74.0-121 95.8 <br /> T6/7-S-20.0' P908378-03 Soil 4 <br /> Tert-amyl methyl ether 9080470 8/19/99 8/19/99 0.0250 ND mg/kg <br /> Tert-butyl alcohol 0.500 ND " <br /> Di-isopropyl ether 0.0250 ND <br /> Ethyl tert-butyl ether 0.0250 ND " <br /> Methyl tert-butyl ether 0.0250 ND " <br /> Surrogate: Dibromofluoromethane 80.0-110 94.6 % <br /> Surrogate: 1,2-Dichloroethane-d4 " " " 80.0-120 91.8 of <br /> Surrogate: Toluene-d8 " " " 81.0-117 98.8 IF <br /> Surrogate: 4-Bromofluorobenzene " " " 74.0-121 93.6 If <br /> T7-N-24.5' P908378-04 Soil 4 <br /> Tert-amyl methyl ether 9080470 8/19/99 8/19/99 0.0250 ND mg/kg <br /> Tert-butyl alcohol 0.500 ND " <br /> Di-isopropyl ether 0.0250 ND " <br /> Ethyl tert-butyl ether 0.0250 ND <br /> Methyl tert-butyl ether 0.0250 ND " <br /> Surrogate: Dibromofluoromethane 80.0-120 96.2 % <br /> Surrogate: 1,2-Dichloroethane-d4 80.0-110 98.4 " <br /> Surrogate: Toluene-d8 81.0-117 99.1 <br /> Sequoia Analytical-Petaluma *Refer to end of report for text of notes and definitions. <br /> Page 7 of 16 <br />