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1455 McDowell Blvd North Ste D <br /> ID Sequoia Petaluma,CA 94954 <br /> (707) 792-1865 <br /> MW Analytical FAX(707)792-0342 <br /> em—TIC Engineering Project Exxon Sampled 3/30/99 <br /> P O Box 4429 Project Number 4444 N Pershing Ave,Stockton/UP3942 Received 4/1199 <br /> Walnut Creek,CA 94596 Project Manager Chnsta Martin& Learted 4/14/99 <br /> Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 8015AU8020A4/Quality Control <br /> Sequoia Analytical-Petaluma <br /> Date Spike Sample QC Reporting Ltttut Recov RPD RPD <br /> I.knalyte Analyzed Level Result Result Units Recov Limits % Unut % Notes* <br /> Matrix Spike 9040281-MS1 P904217-01 <br /> Benzene 4/13/99 100 ND 107 ug/l 650-135 107 <br /> Toluene 100 ND 105 650-135 105 <br /> Ethylbenzene 100 ND 101 " 650-135 141 <br /> Xylenes(total) 300 ND 319 650-135 106 <br /> Surrogate a a a-Tnfluorotoluene 300 301 650-135 100 <br /> IMatrix Spike Dun 9040281-MSD1 P904217-01 <br /> Benzene 4/13/99 100 ND 103 ug/l 65 0-135 103 200 381 <br /> Toluene 100 ND 102 650-135 102 200 290 <br />' Ethylbenzene „' 100 ND 98 2 650-135 982 200 281 <br /> Xylenes(total) 300 ND 308 650-135 103 200 2 87 <br /> Surrogate a a a-Trifluorotoluene 300 301 650-135 100 <br /> I <br /> I <br /> I I <br /> equola Analytical-Petaluma *Refer to end of report for text of notes and def nitons <br /> Ipage 5 of 6 <br />