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Sequoia <br /> los, A 9,2070-4111 <br /> ,20701 Road <br /> (.� San Carlos, CA 94070-41 1] <br /> Analytical FAX <br /> 41) (650) 232-9600 <br /> (650) 232-9612 <br /> Sequoia-Morgan Hill Project B1ame(CHEVRON Sampled 8/30/99 <br /> 885 Janes Drive Project Number 9090037/2409 E Main, Stockton Received 8/31/99 <br /> Morgan Hill,CA 95037 Project Manager Wendy Bonnes R orted 9/14/99 <br /> �olata[e'O�gazea�c O�cygenatedCorapounds�y EPA 11lrethad'82b0AlQuality Control <br /> ltsi�quots 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 9090030 Date Prepared 9/7199 Extraction MethodEPA 50305 fP/Fl <br /> Blank 9090030-BLK1 <br /> Ethanol 9/7/99 ND ug/l 1000 <br /> Tert-butyl alcohol ND 200 <br /> Methyl tert-butyl ether ND 200 <br /> Di-isopropyl ether ND 200 <br /> Ethyl tent-butyl ether " ND 200 <br /> Tert-amyl methyl ether ND 200 <br /> Surrogate 1,2-Dtchloroethane-d4 500 51 7 760-114 103 <br /> Blank 9090030-BLKZ <br /> Ethanol 9/7/99 ND ugll 1000 <br /> Tert-butyl alcohol to ND to 200 <br /> Methyl tent-butyl ether ND 11 200 <br /> Di-isopropyl ether ND ti 200 <br /> Awyl tert-butyl ether ND 200 <br /> rt-amyl methyl ether to ND to 200 <br /> Surrogate 1,2-Dichloroethane-d4 " 500 485 " 760-114 970 <br /> Blank 9090030-BLK3 <br /> Ethanol 9/8/99 ND ug/l 1000 <br /> Tert-butyl alcohol 11ND 11 200 <br /> Methyl tert-butyl ether ND 200 <br /> Di-isopropyl ether ND 200 <br /> Ethyl tert-butyl ether ND 200 <br /> Tert-amyl methyl ether ND ti 200 <br /> Surrogate 1,2-Dtchloroethane-d4 500 562 760-114 112 <br /> LCS 9090030-BSI <br /> Methyl tert-butyl ether 9/7/99 500 551 ug/l 700-130 110 <br /> Surrogate 1,2 Dichloroethane-d4 11500 525 ol 76 0-114 105 <br /> LCS 9090030-BS2 <br /> Methyl tert-butyl ether 9/7/99 500 500 ug/l 700-130 100 <br /> Surrogate 1,2-Dtchloroethane-d4 11 500 480 760-114 960 <br /> LCS 9090030-BS3 <br /> Methyl tert-butyl ether 9/8/99 Soo 559 ugll 700-130 112 <br /> Surrogate 1,2-Dtchloroethane-d4 It 500 562 IP 760-114 112 <br /> Matrix Strike 9090030-MSI L909015-08 <br /> Methyl tert-butyl ether 9/7/99 Soo ND 513 ug/1 600-140 103 <br /> nota Analytical-San Carlos *Refer to end of report for text of notes and definitions <br /> Page 5 of 7 <br />