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'� Sequoia <br />14W Analytical <br />CON/IT - Sacramento <br />1433 N Market Blvd , #1 <br />Sacramento, CA 95834 <br />819 Striker Avenue, Suite 8 <br />Sacramento CA 95834 <br />(916) 921-9600 <br />FAX (916) 921 -0 100 <br />Project ARCO 2168, Stockton, CA Sampled 12/17/99 <br />Project Number 792229 Received 12/20/99 <br />?roject Manager Dave Foley Reported 115100 <br />Total Purgeable Hydrocarbons (C6-CJ2) and BTEX by DHS LUFT/Quality Control <br />Sequoia Analytical - Sacramento <br />Date Spike Sample QC Reporting Limit Recov RPD RPD <br />Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br />Batch 9120349 <br />Blank <br />Purgeable Hydrocarbons <br />Benzene <br />Toluene <br />Ethylbenzene <br />Surrogate a a a -Tris luorotoluene <br />LCS <br />Benzene <br />Toluene <br />Ethylbenzene <br />Surrogate a,a a-Triuorotoluene <br />Afttrix Spike <br />zene <br />Toluene <br />Ethylbenzene <br />Surrogate a a a-Trlfluorotoluene <br />Date Prepared 12/27/99 <br />9120349-BLK1 <br />12/27/99 <br />„ <br />100 <br />9120349 -BSI <br />12/27/99 100 <br />" 100 <br />100 <br />300 <br />bili: <br />9120349 -MSI <br />5912243-05 <br />12/27/99 100 <br />336 <br />" 100 <br />0 616 <br />" 100 <br />0 565 <br />" 300 <br />204 <br />100 <br />Matrix Spike Duu <br />Extraction Method EPA 5030B (MeOH) <br />5912243-05 <br />ND <br />ug/1 <br />500 <br />ND <br />" <br />0 500 <br />336 <br />ND <br />600-140 <br />0 500 <br />250 <br />ND <br />Toluene <br />0 500 <br />0 616 <br />ND <br />600-140 <br />0 500 <br />250 <br />988 <br />Ethylbenzene <br />600-140 <br />988 <br />945 <br />ug/l <br />700-130 <br />845 <br />873 <br />Xylenes (total) <br />700-130 <br />873 <br />859 <br />600-140 <br />700-130 <br />859 <br />26 1 <br />Surrogate a a,a-Tr�fluorotoluene <br />700-130 <br />870 <br />898 <br />600-140 <br />600-140 <br />898 <br />1 I 6 <br />ug/1 <br />600-140 <br />824 <br />939 <br />" <br />600-140 <br />877 <br />940 <br />600-140 <br />883 <br />28 8 <br />600-140 <br />892 <br />941 <br />600-140 <br />941 <br />Matrix Spike Duu <br />9120349-MSDI <br />5912243-05 <br />Benzene <br />12/27/99 10 0 <br />336 <br />11 6 ug/1 <br />600-140 <br />824 <br />250 <br />0 <br />Toluene <br />10 0 <br />0 616 <br />9 03 <br />600-140 <br />841 <br />250 <br />4 19 <br />Ethylbenzene <br />10 0 <br />0 565 <br />9 17 <br />600-140 <br />861 <br />25 0 <br />252 <br />Xylenes (total) <br />300 <br />204 <br />277 <br />600-140 <br />85 5 <br />250 <br />424 <br />Surrogate a a,a-Tr�fluorotoluene <br />100 <br />957 <br />600-140 <br />95 7 <br />ia Analytical - Sacrame <br />ontoo <br />*Refer to end of report for text of notes and definitions <br />Page 6 of <br />