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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 /> a- ) 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 /> aineTechSeivices Project Shell(]) Sampled 4/15/99 <br /> 1680 Rogers Avenue Project Number Shell 2575 Country Club Blvd,Stockton Received 4116199 <br /> San Jose,CA 95112 Project Manager Fran Thie Reported 516199 <br /> Volatile Organic Oxygenated Compounds by EPA Method 8260A1Quahty 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 % 1 unit % Notes* <br /> Batch 9040114 Date Prepared 4/22/99 Extraction Method EPA 5030B FP/T1 <br /> Blank 9040114-BLK1 j <br /> Ethanol 4122199 ND ug/l 3000 <br /> Tert-butyl alcohol RTD 200 <br /> Methyl tert-butyl ether ND 200 <br /> Di-isopropyl ether ND 2.00 <br /> Ethyl tert-butyl ether ND 200 <br /> Tert-amyl methyl ether ND 200 <br /> Surrogate 1,2-Drchloroethane-d4 500 510 it760-114 102 <br /> Blank 9040114-BLK2 <br /> Ethanol 4/23/99 ND ug/l 3000 <br /> Tert-butyl alcohol " ND 200 <br /> Methyl tert-butyl ether ifND 200 <br /> Di-isopropyl ether ND 200 <br /> 1 tert-butyl ether ND 200 <br /> amyl methyl ether " ND 200 <br /> Surrogate 1,2-Drchloroethane-d4 500 530 760-114 106 <br /> LCS 9040114-BSI <br /> Methyl tert-butyl ether 4/22/99 500 459 ug/1 700-130 91 8 <br /> Surrogate 12-Drchloroethane-d4 500 518 760-114 104 <br /> LCS 9040114-BS2 <br /> Methyl tert-butyl ether 4/23/99 500 478 ug/l 700-130 956 <br /> Surrogate 12-Dichloroethane-d4 500 538 760-114 108 <br /> Matrix Spike 9040114-MSI L904185-02 <br /> Methyl tert-butyl ether 4/22/99 500 103 589 ug/l 600-140 972 <br /> Surrogate 12-Drchloroethane-d4 11500 541 760-114 108 <br /> Matrix Spike Duo 9040114-MSDI L904185-02 <br /> Methyl tert-butyl ether 4122199 500 103 584 ug/l 600-140 962 250 103 <br /> Surrogate 12-Drchloroethane-d4 if 500 528 If 760-114 106 <br /> Batch 9040119 Date Prepared 4123/99 Extraction Method EPA 5030B ]P/T1 <br /> Blank 9040119-BLKI <br /> Ethanol 4/23/99 ND 119/1 3000 <br /> Tert-butyl alcohol " ND 11 200 <br /> Methyl tert-butyl ether ND it 200 <br /> Di-isopropyl ether ND 200 <br /> Ethyl tert-butyl ether ND 200 <br /> oia Analytical- San Carlos *Refer to end of report for text of notes and definitions <br /> Page 30 of 32 <br />