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11455 McDowell Blvd North,Ste D <br /> Sequoia Petaluma CA 94954 <br /> (707)79Z-1865 <br /> Analytical FAX(707)792-0342 <br /> IWFE—T1,C Engineering Project Exxon Sampled 3130199 <br /> P O Box 4429 Project Number 4444 N Pershing Ave,Stockton/UP3942 Received 4/1/99 <br /> Walnut Creek,CA 94596 Project Manager Chnsta Martmg Reported 4/14199 <br /> Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 8015M/8020M/Quality Control <br /> Sequoia Analytical-Petaluma <br /> IDate Spike Sample QC Reporting Litntt Recov RPD RPD <br /> lAnalyte Analyzed Level Result Result Units Recov Limits % Linut % Notes'` <br /> Batch 9040272 Date Prepared 4112199 Extraction Method EPA 5030 waters <br /> Blank 9040272-BLK1 <br /> Gasoline 4112199 ND ug/I 500 <br /> Benzene ND 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> IXylenes(total) ND " 0 500 <br /> Methyl tert-butyl ether ND 200 <br /> Surrogate a a a-Trrfluorotoluene 300 289 650-135 96 3 <br /> Surrogate 4-Bromofluorobenzene 300 279 650-135 930 <br /> ILCS 9040272-BSI <br /> Gasoline 4112/99 1000 1110 _ ug/1 650-135 111 <br /> Surrogate 4-Bromofluorobenzene " 300 281 650-135 93 7 <br /> Ltri-d'9nike 9040272-MSI P904094-01 <br /> asoline _ _ 4/12/99 __ 1000 ND _ 1080 _ug/l 650-135 108 <br /> Surrogate 4-Bromofluorobenzene 300 281 650-135 93 7 <br /> Matrix Spike Dup 9040272-MSDI P904094-01 <br /> Gasoline 4112/99 1000 ND 1090 ug/I 65 0-135 109 200 0922 _ <br /> ISurrogate 4-Bromofluorobenzene 300 281 11 650-135 93 7 <br /> Batch 9040281 Date Prepared 4113199 Extraction Method EPA 5030 waters <br /> Blank 9040281-BLKI <br /> Gasoline 4/13/99 ND ug/I 500 <br /> Benzene ND 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) ND 0 500 <br /> Methyl tert-butyl ether ND 2.00 <br /> Surrogate a a a-Trifluorotoluene 300 299 650-135 997 <br /> Surrogate 4-Bromofluorobenzene 300 283 650-135 943 <br /> LCS 9040281-BSI <br /> Benzene 4/13199 100 107 ug/1 650-135 107 <br /> Toluene 100 105 650-135 105 <br /> Ethylbenzene 100 101 650-135 101 <br /> Xylenes(total) 300 319 650-135 106 <br /> Surrogate a,a a-Trifluarotoluene 300 296 650-135 98 7 <br /> is <br /> equoia Analytical-Petaluma *Refer to end of report for text of notes and def nitrons <br />' Page 4 of 6 <br />