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680 Chesapeake Drive Redwood City.CA 94063 (650)364-9600 FAX(650)364-9233 <br /> Sequoia 404 N.Wiget Lane Walnut Creek,CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Analytical 1455 McDowell Blvd.North.Ste.D Petaluma.CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Sequoia-RC(Subbed In) Project: Kayvon Kimyai Sampled: 2/26/99 <br /> 680 Chesapeake Dr. Project Number: 9903044 Received: 3/3199 <br /> Redwood City,CA 94063 Project Manager: Kayvan Kim ai Reported: 3/8199 <br /> Volatile Organic Compounds by EPA Method 8260BIQuality 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: 9030125 Date Prepared: 314199 Extraction Method: EPA 5030 waters <br /> Blank 9030125-BLK1 <br /> Tert-amyl methyl ether 3/4/99 ND ug/1 1.00 <br />'Tert-butyl alcohol ND 20.0 <br /> Di-isopropyl ether ND " 1.00 <br /> 1,2-Dibromoethane(EDB) ND 0.500 <br /> 1,2-Dichloroethane ND 0.500 <br />'Ethanol ND " 100 <br /> Ethyl tert-butyl ether ND 1.00 <br /> Methyl tert-butyl ether ND 1.00 <br /> Surrogate_- Dibromofluoromethane 5.00 5.12 86.0-118 102 <br />'Surrogate: 1,2-Dichloroethane-d4 5.00 5.31 80.0-120 106 <br /> Surrogate: Toluene-d8 5.00 5.08 88.0-110 102 <br /> Surrogate: 4-Bromofluoro6enzene 5.00 5.10 86.0-115 102 <br /> Ok 9030125-BLK2 <br /> Tert-amyl methyl ether 3/5199 ND ug/l 1.00 <br />,Tert-buryl alcohol ND 20.0 <br /> Di-isopropyl ether ND 1.00 <br /> 1,2-Dibromoethane(EDB) ND 0.500 <br /> 1,2-Dichloroethane ND 0.500 <br /> Ethanol ND 100 <br /> Ethyl tert-butyl ether ND 1.00 <br /> Methyl tert-butyl ether ND 1.00 <br /> Surrogate: Dibromofluoromethane 5.00 4.86 86.0-118 97.2 <br /> 'Surrogate: 1,2-Dichloroethane-d4 5.00 4.95 80.0-120 99.0 <br /> Surrogate: Toluene-d8 5.00 4.86 88.0-110 97.2 <br /> Surrogate: 4-Bromofluorobenzene 5.00 4.85 86.0-115 97.0 <br /> 'Blank 9030125-BLK3 <br /> Tert-amyl methyl ether 315/99 ND ug/1 1.00 <br /> Tert-butyl alcohol ND 20.0 <br /> IDi-isopropyl ether ND 1.00 <br /> 1,2-Dibromoethane(EDB) ND 0.500 <br /> 1,2-Dichloroethane ND 0.500 <br /> Ethanol ND 100 <br /> Ethyl tert-butyl ether ND 1.00 <br /> Methyl tert-butyl ether ND 1.00 <br /> Surrogate: Dibromofluoromethane ff5.00 4.94 86.0-118 98.8 <br /> ,Surrogate: 1,2-Dichloroethane-d4 115.00 5.00 80.0-120 100 <br /> Surrogate: Toluene-d8 5.00 4.99 88.0-110 99.8 <br /> gate: 4-Bromofluorobenzene 5.00 4.94 86.0-115 98.8 <br /> Sequoia Analytical-Petaluma *Refer to end of report for text of notes and definitions. <br /> Page 3 of 5 <br />