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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/Quality Control <br /> Sequoia Analytical-Petaluma <br /> Date Spike Sample QC Reporting Limit Recov. RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov. Limits % Limit % Notes* <br /> Batch: 9080470 Date Prepared: 8/19/99 Extraction Method: EPA 5035 <br /> Blank 9080470-BLKI <br /> Tert-amyl methyl ether 8/19/99 ND mg/kg 0.00500 <br /> Tert-butyl alcohol ND 0.100 <br /> Di-isopropyl ether ND 0.00500 <br /> 1,2-Dibromoethane(EDB) ND 0.00500 <br /> 1,2-Dichloroethane ND 0.00500 <br /> Ethanol ND 0.200 <br /> Ethyl tert-butyl ether ND 0.00500 <br /> Methyl tert-butyl ether ND 0.00500 <br /> Surrogate: Dibromofluoromethane 0.0500 0.0506 80.0-120 101 <br /> Surrogate: 1,2-Dichloroethane-d4 0.0500 0.0483 80.0-120 96.6 <br /> Surrogate: Toluene-d8 0.0500 0.0528 81.0-117 106 <br /> Surrogate: 4-Bromofluorobenzene 0.0500 0.0501 74.0-121 100 <br /> Blank 9080470-BLK2 <br /> Tert-amyl methyl ether 8/20/99 ND mg/kg 0.00500 <br /> Tert-butyl alcohol ND 0.100 <br /> Di-isopropyl ether ND 0.00500 <br /> 1,2-Dibromoethane(EDB) ND 0.00500 <br /> 1,2-Dichloroethane ND 0.00500 <br /> Ethanol ND 0.200 <br /> Ethyl tert-butyl ether ND 0.00500 <br /> Methyl tert-butyl ether ND 0.00500 <br /> Surrogate: Dibromofluoromethane 0.0500 0.0496 80.0-120 99.2 <br /> Surrogate: 1,2-Dichloroethane-d4 0.0500 0.0492 80.0-120 98.4 <br /> Surrogate: Toluene-d8 0.0500 0.0514 81.0-117 103 <br /> Surrogate: 4-Bromofluorobenzene 0.0500 0.0494 74.0-121 98.8 <br /> LCS 9080470-BSI <br /> Methyl tert-butyl ether 8/19/99 0.0500 0.0497 mg/kg 75.8-124 99.4 <br /> Surrogate: Dibromofluoromethane 0.0500 0.0493 80.0-120 98.6 <br /> Surrogate: 1,2-Dichloroethane-d4 0.0500 0.0477 80.0-120 95.4 <br /> Surrogate: Toluene-d8 0.0500 0.0508 81.0-117 102 <br /> Surrogate: 4-Bromofluorobenzene 0.0500 0.0476 74.0-121 95.2 <br /> LCS 9080470-BS2 <br /> Methyl tert-butyl ether 8/20/99 0.0500 0.0533 mg/kg 75.8-124 107 _ <br /> Surrogate: Dibromofluoromethai:e 0.0500 0.0523 80.0-120 105 <br /> Surrogate: 1,2-Dichloroethane-d4 0.0500 0.0522 80.0-120 104 <br /> Surrogate: Toluene-d8 0.0500 0.0539 81.0-117 108 <br /> Surrogate: 4-Bromofluorobenzene 0.0500 0.0531 74.0-121 106 <br /> Sequoia Analytical-Petaluma *Refer to end of report for text of notes and definitions. <br /> Pasc 14 of 16 <br />