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680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9239 {'r <br /> Sequoia 404 N Wiget Lane Walnut Creek,CA 94598 (925)988-9600 FAX(925)988-9673 <br /> A t 819 Striker Avenue Suite B Sacramento CA 95834 (916)921-%00 FAX(916)921-0100 <br /> >« 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> 1551 Industrial Road San Carlos,CA 94070-4111 (650)232-9600 FAX(650)232-9612 <br /> Sequoia-Petaluma Project Scott Forbes Sampled 3/11/99 <br /> 1455 N McDowell Blvd,Suite D Project Number P903469 Received 3/23/99 <br /> Petaluma,CA 94954 Project Manager Scott Forbes Reported 4/6/99 <br /> Sample Description P903469-02 <br /> Laboratory Sample Number L903210-01 <br /> Batch Date Date Specific Method/ Reporting <br /> Analyte Number Prepared Analyzed Surrogate Limits limit Result Units Notes* <br /> Sequoia Analvocal-San Carlos <br /> Volatile Organic Compounds by EPA Method 8260A <br /> Di-isopropyl ether 9030107 3124/99 3/25/99 200 ND ug/l <br /> Ethyl tert-butyl ether " 11200 ND " <br /> Methyl tert-butyl ether 0 <br /> " 0 500 0 830 " <br /> Tert-amyl methyl ether 200 ND " <br /> Tert-butyl alcohol too ND " <br /> Surrogate 12-Dichloroethane-d4 760-114 92 0 % <br /> Surrogate Toluene-d8 880-110 93 6 " <br /> Sequoia Analytical-San Carlos *Refer to end of report far text of notes and definitions . <br /> Page 2 of 7 <br />