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Sequoia 680 Chesapeake Drive Redwood Clty,CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 N.Wiget Lane Walnut Creek,CA 94598 (925)988-9600 FAX(925)988-9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd.North,Ste.D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> FATC Associates,Inc. Project: SUSD/Corporation Yard Sampled: 2/23199 to 2/24/99 <br /> 7 Lone Palm Ave.,Suite B Project Number: na Received: 3/1/99 <br /> esto,CA 95351 Project Manager: Tom Lutterman Reported: 3/15/99 <br /> Volatile Organic Compounds by EPA Method 826OB/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 /> Matrix Spike 9030118-MSI P902601-40 <br /> Methyl tent-butyl ether 3/4/99 50.0 ND 48.9 ug/kg 70.0-130 97.8 <br /> Surrogate: Dibromofluoromethane 50.0 48.9 to 80.0-120 97.8 <br /> Surrogate: 1,2-Dichloroethane-d4 50.0 42.1 80.0-120 84.2 <br /> Surrogate: Toluene-d8 i' 50.0 46.7 81.0-117 93.4 <br /> Surrogate: 4-Bromofluorobenzene 50.0 55.3 74.0-121 111 <br /> Matrix Spike Du p 9030118-MSDI P90260140 <br /> _Methyl tert-butyl ether 3/4/99 50.0 _ND 59.0 ug/kg _ 70.0-130 118 20.0 18.7 <br /> Surrogate: Dibromofluoromethane 50.0 59.3 80,0.120 119 --- ��- <br /> Surrogate: 1,2-Dichloroethane-d4 50.0 66.6 80.0-120 133 <br /> Surrogate: Toluene-d8 50.0 51.1 81.0-117 102 <br /> Surrogate 4-Bromofluorobenzene of 50.0 60.5 to 74.0-121 121 6 <br /> o^tch 9030221 Date Prepared: 319199 Extraction Method: EPA 5035 <br /> nk <br /> - 903022 <br /> 1-BLK1LTert-a1meth 1 ether 3/9/99 <br /> ND ug/kg 5.00 <br /> Tert-butyl alcohol ND 100 <br /> Di-isopropyl ether ND 5.00 <br /> 1,2-Dibromoethane(EDB) ND 5.00 <br /> 1,2-Dichloroethane ND " 5,00 <br /> Ethanol ND 200 <br /> Ethyl cert-butyl ether ND 5.00 <br /> Methyl tert-butyl ether ND 5.00 <br /> Surrogate: Dibromofluoromethane 50.0 47.7 80.0-120 95.4 <br /> Surrogate: 1,2-Dichloroethane-d4 50.0 44.6 i% 80.0-120 89.2 <br /> Surrogate: Toluene-d8 50.0 50.0 81.0-117 100 <br /> Surrogate: 4-Bromofluorobenzene " 50.0 50.2 of 74.0-121 100 <br /> Blank 9030221-BLK2 <br /> Tert-amyl methyl ether 3/10/99 ND ug/kg 5.00 <br /> Tert-butyl alcohol ND 100 <br /> Di-isopropyl ether ND 5.00 <br /> 1,2-Dibromoethane(EDB) ND 5.00 <br /> 1,2-Dichloroethane ND 5.00 <br /> Ethanol ND 200 <br /> Ethyl tert-butyl ether " ND " 5.00 <br /> Methyl tert-butyl ether _ __ ND 5.00 _ <br /> Surrogate: Dibromofluoromethane 50,0 48.3 80.0-120 96.6 <br /> Surrogate: 1,2-Dichloroethane-d4 50.0 44.4 80.0-120 88.8 <br /> Surrogate: Toluene-d8 50.0 52.0 81.0-117 104 <br /> Surrogate: 4-Bromofluorobenzene 50.0 52.D 74.0-I21 104 <br /> �uuora Analytical-Petaluma *Refer to end of report for text of notes acrd definitions. <br /> i <br /> t <br /> Page 25 of 28 <br /> Y <br />