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1455 McDowell Blvd North,Ste D <br /> Sequoia Petaluma CA 94954 <br /> 4 (707) 792-1865 <br /> („- Analytical FAX(707) 792-0342 <br /> i <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 8113199 <br /> Sonoma,CA 95476 Project Manager Aubrey Cool Reported 8/20/99 <br /> Volatile Organic Compounds by EPA Method 8260B/Quahty Control <br /> Sequoia Analytical-Petaluma <br /> Date Spike Sample QC Reporting Liiiut Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Liaut % Notes* <br /> Matrix S131ke 9080470-MSI P908378-01 <br /> Methyl tert-butyl ether 8/19/99 00500 ND 00427 mg/kg 75 8-124 854 <br /> Surrogate Dibromofluoromethane 00500 00459 800-120 918 <br /> Surrogate 12-Dichloroethane-d4 00500 00433 800-120 866 <br /> Surrogate Toluene-d8 00500 00481 81 0-117 962 <br /> Surrogate 4-Bromofluorobenzene rF00500 00451 740-121 902 <br /> Matrix Spike Dup 9080470-MSD1 P908378-0I <br /> Methyl tert-butyl ether 8/19/99 00500 ND 00492 mg/kg 758-124 98 4 35 0 141 _ <br /> Surrogate Dibromofluoromethane 00500 00475 800-120 950 <br /> Surrogate 12-Dichloroethane-d4 00500 00457 800-120 914 <br /> Surrogate Toluene-d8 00500 00495 810-117 990 <br /> Surrogate 4-Bromofluorobenzene 00500 00454 740-121 908 <br /> Sequoia Analytical -Petaluma *Refer to end of report for text of notes and definitions <br /> Page 15 of 16 <br /> Com` <br />