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1455 McDowell Blvd North Ste D <br /> Sequoia <br /> Petaluma,CA 94954 <br /> (707) 792-1865 <br /> Analytical FAX(707) 792-0342 <br /> 1 ET1C Engineering Project Exxon Sampled 515199 <br /> P O Box 4429 Project Number UP3942 117-3942 Received 517199 <br />' Walnut Creek,CA 94596 Project Manager Chnsta Marting Reported 5/20/99 <br /> Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 8015M/8020M/Quality Control <br /> Sequoia Analytical-Petaluma <br /> Date Spike Sample QC Reporting Ltmtt Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Linuts % Limit % Notes* <br /> Matrix Spike Dup 9050481-MSDI P905293-04 <br /> Gasoline 5118/99 1000 ND 1010 ug/I 650-135 101 200 0 995 <br /> Surrogate 4-Bromofluorobenzene of 300 279 11650-135 930 <br /> Batch 9050483 Date Prepared 5118199 Extraction Method EPA 5030 waters <br /> Blank 9050483-BLKI <br /> IGasoline 5/18/99 ND ug/l 500 <br /> Benzene ND 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) — ND 0500 ----- <br /> Methyl tent-butyl ether ND 200 <br /> .Surrogate a a a-Triuorotoluene 300 316 650-135� 105 <br /> Surrogate 4-Bromofluorobenzene 300 299 650-135 997 <br /> 1 OS 9050483-BS1 <br /> Gasoline____ 5/18/99 ____1000 _ _ 898 ug/I 650-135 898 <br /> Surrogate 4-Bromofluorobenzene 300 303 650-135 101 <br /> Matrix Spike 9050483-MSI P905210-01 <br /> Gasoline _ 5/18/99 1000 ND 921 ug/I 650-135 921 <br /> Surrogate 4-Bromofluorobenzene 11 300 300 650-135 100 <br /> Matrix Spike Dup 9050483-MSDI P905210-01 <br /> Gasoline _ 5/18/99____ 1000 _ _N_D_ 850 ug/I 650-135 85 0 20 0-8 02 <br /> Surrogate 4-Bromofluorobenzene 300 Y 305 650-135 102 _ <br /> I <br /> I <br /> Sequoia Analytical-Petaluma *Refer to end of report for text of notes and definitions <br /> IPage 24 of 25 <br />