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1 <br /> Sequoia 1455 McDowell Blvd North, Ste D <br /> la) Petaluma, CA 94954 <br /> (707) 792-1865 <br /> Analytical FAX(707) 792-0342 <br />' ETIC Engineering Project Exxon Sampled 515199 <br /> P O Box 4429 Project Number UP3942 1/7-3942 Received 5/7/99 <br /> Walnut Creek,CA 94596 Project Manager Chnsta Marting Reported 5/20/99 <br /> Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 8015M/8020MIQuality Control <br />' Sequoia Analytical-Petaluma <br /> Date Spike Sample QC Retorting Linut Recov RPD RPD <br /> IAnalyte Anal Level Result Result Units Recov Limits % Limit % Notes* <br />' Batch 9050462 Date Prepared „5/18199 Extraction Method EPA 5030 waters <br /> Blank 9050462-BLK1 <br /> Gasoline 5/18/99 NO ug/l 500 <br />' Benzene ND 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene NO 0 500 <br />' Xylenes(total) — ND — 0 500 <br /> Methyl tert-butyl ether NO 200 <br /> Surrogate a a a-Trtfluorotoluene 11300 268 650-135 893 <br /> Surrogate 4-Bromofluorobenzene 300 260 650-135 867 <br /> LCS 9050462-BS] <br /> Gasoline _ _ 5118199 1000 998 ug/l 650-135 998 <br /> Surrogate 4-Bromofluarobenzene 300 263 650-135 877 <br /> 0tr�x SQ�ke 9050462-MS] P905119-05 <br /> Gasoline _ _ 5118/99 1000 _ ND� 927 ug/l _650-135 927 _ <br /> Surrogate 4-Bromofluorobenzene 300 237 _ 650-135 790 <br /> Matrix Spike Dup 9050462-MSD1 P905119-05 <br /> Gasoline 5/18199 1000 ND 984 ug/l 650-135 984 200 597 <br /> Surrogate 4-Bromofluorobenzene M 300 265 11 650-135 883 <br /> Batch 9050481 Date Prepared 5/18199 Extraction Method EPA 5030 waters <br /> Blank 9050481-BLK1 <br /> Gasoline 5/18/99 NO ug/l 500 <br /> Benzene NO 0 500 <br /> Toluene ND 0 500 <br /> IEthyibenzene " NO " 0 500 <br /> Xylenes(total) ND 0 500 <br /> Methyl tent-butyl ether NO 200 <br /> Surrogate a a a-Trifluorotoluene 300 268 650-135 893 <br /> Surrogate 4-Broneofluorobenzene 300 260 650-135 867 <br /> LCS 9050481-BS 1 <br /> Gasoline 5/19/99 1000 1020 ug/l 650-135 102 <br /> Surrogate 4-Bromofluorobenzene 11 300 176 650-135 920 <br /> Matrix Spike 9050481-MS1 P905293-04 <br /> Gasoline 5118/99 1000 ND 1000 ug/l 650-135 100 <br /> 4Vre4-BromoJluorobenzene 300 282 650-135 940 <br /> ISequoia Analytical-Petaluma _ *Refer to end of report for test of notes and definitions <br /> Page 23 of 25 <br />