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r Sequoia 1551 Industrial Road <br /> San Carlos CA 94070-4111 <br /> Analytical <br /> (650) 232-9600 <br /> 1❑, FAX (650) 232-9612 <br /> acne Tech Services Project Chevron(3) Sampled 5/19199 <br /> 1680 Rogers Avenue Project Number Chevron/9-6171/990519-C2 Received 5/21/99 <br /> San Jose,CA 95112 Protect Manager Chnstme Lillie Reported 6/4/99 <br /> µ �Vnlatsle Qrgantc Ugygenated Ciini atindi by EPA Meth©d$260AlQitahty Contri►1 _ _ _ <br /> _ Seguoia Analy ical-San Carlos <br /> Date Spike Sample QC Reporting Linnt Recov RPD RPD <br /> [A_nalyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch 9060010 Date Prepared__6/2/99 Extraction Method EPA 5030B IP/T1 <br /> Blank 9060010-BLKI <br /> Ethanol 6/2/99 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 tert-butyl ether ND 200 <br /> Tert-amyl methyl ether " ND 200 <br /> Surrogate 1,2-Dichloroethane-d4 Soo 489 to 760-114 978 <br /> Blank 9060010-BLK2 <br /> Ethanol 6/2/99 ND ug/l 1000 <br /> Tert-butyl alcohol " ND 200 <br /> Methyl tert-butyl ether ND 200 <br /> Di-isopropyl ether ND 200 <br /> yl tert-butyl ether ND 200 <br /> -amyl methyl ether ND 200 <br /> arrogate 1,2-Dichloroethane-d4 500 482 " 760-114 964 <br /> LCS 9060010-BSI <br /> Methyl tent-butyl ether 6/2/99 500 622 ug/] 700-130 124 <br /> Surrogate 1,2-Dichloroethane-d4 If <br /> 500 563 or <br /> 760-114 113 <br /> LCS 9060010-BS2 <br /> Metbyl tent-butyl ether 6/2/99 500 536 ug/I 700-130 107 <br /> Surrogate 1,2-Dcchloroethane-d4 " 500 494 " 760-114 988 <br /> Matrix Spike 9060010-MS1 L905452-02 <br /> Methyl tert-butyl ether 612/99 500 ND 578 ug/l 600-140 116 <br /> Surrogate 1,2-Dichloroethane-d4 to 500 512 " 760-114 102 <br /> Matrix Spike Aup 9060010-MSD/ L905452-02 <br /> Methyl tent-butyl ether 612199 500 ND 566 ug/I 600-140 113 25 0 262 <br /> Surrogate 1,2 Dichloroethane-d4 of 500 514 760-114 103 <br /> uoia Analytical- San Carlos *Refer to end of report for text of nates and definitions <br /> Page 12 of 13 <br />