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Sequoia 680 Chesapeake Drive Redwood City 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 /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Aw Analytical 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 /> Blaine Tech Services Project Shell(1) Sampled 4/15/99 <br /> 1680 Rogers Avenue Project Number Shell 2575 Country Club Blvd,Stockton Received 4/16/99 <br /> San lose,CA 95112 Project Manager Fran Thie Reported 5/6/94 <br /> Volat>de Orga me Oxygenates)Compounds by EPA/Method 8260A/Quality Control <br /> Sequoia Analytical-San Carlos <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch 9040101 Date Prepared 4/21/99 Extraction Method EPA 5030$Ep/T <br /> Blank 9040101-BLK1 <br /> Ethanol 4/21/99 ND ug/1 3000 <br /> Tert-butyl alcohol ND IF <br /> 200 <br /> Methyl tent-butyl ether ND IF200 <br /> Di-isopropyl ether ND It <br /> 200 <br /> Ethyl tert-butyl ether " ND " 200 <br /> Tert-amyl methyl ether ND 2 00 <br /> Surrogate 1,2-Dich1oroethane-d4 500 51 7 760-114 103 <br /> Blank 9040101-BLK2 <br /> Ethanol 4/21/99 ND ug/l 3000 <br /> Tert-butyl alcohol ND It200 <br /> Methyl tent-butyl ether ND IF 200 <br /> Di-isopropyl ether ND 200 <br /> 01 tert-butyl ether ND 200 <br /> amyl methyl ether _ ND " 200 <br /> urrogate 12-Dichloroethane-d4 500 524 760-114 105 <br /> LCS 9040101-BSI <br /> Methyl tert-butyl ether 4/21/99 500 466 ug/l 700-130 93 2 - <br /> Surrogate 1,2-Dichloroethane-d4 IF500 52 6 760-114 105 <br /> LCS 9040101-BS2 <br /> Methyl tent-butyl ether 4/21/49 500 48 1 ug/l 700-130 962 <br /> Surrogate 1,2-Dichloroethane-d4 500 52 7 It760-114 105 <br /> _Matrix Spike 9040101-MSI L904164-03 <br /> Methyl tert-butyl ether 4/21/99 Soo ND 476 ug/1 600-140 952 <br /> Surrogate 1,2-Dichloroethane-d4 19500 530 to 760-114 106 <br /> _Matrix Spike Duo 9040101-MSDI L904164-03 <br /> Methyl tert-butyl ether 4121/99 50 0 ND 50 6 ug/l 600-140 101 25 0 5 91 <br /> Surrogate 1,2-Dichloroethane-d4 IF <br /> 500 53 6 760-114 107 <br /> Batch 9040107 Date Prepared 4/21199 Extraction Method EPA 5030B PIT <br /> Blank 9040107-BLK1 <br /> Ethanol 4/21/99 ND ug/1 3000 <br /> Tert-butyl alcohol " ND " 200 <br /> Methyl tert-butyl ether ND it 200 <br /> Di-isopropyl ether ND It 2 00 <br /> Ethyl tert-butyl ether ND it 200 <br /> oia Analytical-San Carlos *Refer to end of report far text of notes and definitions <br /> page 28 of 32 <br />