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A <br /> IV 1455 McDowell Blvd North Ste D <br /> Sequoia Petaluma CA 94954 <br /> (707) 792-1865 <br /> Analytical FAX(707) 792-0342 <br /> OW <br /> Cambria Environmental Project Shell Oil Co Sampled 9/15/99 <br /> 270 Perkins St Project Number 43 t 5 Waterloo Received 9/16/99 <br /> Sonoma,CA 95476 Project Manager Bob Perlowski Reported 9129199 <br /> Volatile Organic Compounds by EPA Method 8260B/Quality Control <br /> Sequoia Analytical-Petaluma <br /> Date Spike Sample QC Reporting Linvit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Matrix Spike 9090574-MSI P909525-02 <br /> Methyl tert-butyl ether 9122199 00500 ND 00481 mg/kg 75 8-124 962 <br /> Surrogate Dibromofluoromethane 00500 00495 800-120 990 <br /> Surrogate 12-Dichloroethane-d4 00500 00514 800-120 103 <br /> Surrogate Toluene-d8 00500 00504 81 0-117 101 <br /> Surrogate 4-Bromofluorobenzene 00500 00462 740-121 924 <br /> Matrix Spike Dun 9090574-MSDI P909525-02 <br /> Methyl tert-butyl ether _ 9/22/99 00500 ND 00464 mg/kg 75 8-124 928 350 3 60 <br /> Surrogate Dibronrofluoromethone 00500 00454 800-120 �90 8 <br /> Surrogate 12-Dichloroelhane-d4 00500 00477 800-120 954 <br /> Surrogate Toluene-d8 00500 00463 810-117 926 <br /> Surrogate 4-Bromofluorobenzene 00500 00396 740-121 792 <br /> Sequoia Analytical - Petaluma *Refer to end of report for tent of notes and defimttons <br /> Page 6 of 7 <br />