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QSequoia <br />Analytical <br />1551 Industrial Road <br />San Carlos CA 94070-4111 <br />(650) 232-9600 <br />FAX (650) 23Z-9612 <br />www sequoialabs corn <br />Gettler-Ryan/Geostrategies(l) <br />Project <br />Chevron(1) <br />Sampled <br />6122100 <br />6747 Sierra Court, Suite J <br />Project Number <br />Chevron 9-5775 <br />Received <br />6123100 <br />Dublin, CA 94568 <br />Project Manager <br />Scott Polston <br />R rted <br />6/28100 <br />Total Purgeable Hydrocarbons (C6 -C12) and BTEX by DHS LUFTlQuaiity Control <br />Sequoia Analytical - San Carlos <br />Date Spike Sample QC Reporting Limit Recov RPD RPD <br />Analvte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br />Batch. 0060112 Date Prepared 6/26100 <br />Blank 0060112-BLKI <br />Extraction Method_ EPA 50308 Wrl <br />Purgeable Hydrocarbons as Gasoline <br />6126100 <br />" 100 <br />ND <br />ug/1 <br />Soo <br />" 300 <br />Benzene <br />" 100 <br />302 <br />ND <br />101 <br />0 500 <br />600-140 <br />Toluene <br />370 <br />Toluene <br />ND <br />ND <br />0 500 <br />600-140 <br />Ethylbenzene <br />250 <br />293 <br />ND <br />100 <br />0 500 <br />104 <br />Xylenes (total) <br />104 <br />250 <br />ND <br />Xylenes (total) <br />0 500 <br />ND <br />Surrogate a a a-Trifluorotoluene <br />600-140 <br />100 <br />10 7 <br />293 <br />600-140 <br />107 <br />LCS <br />0060112 -BS 1 <br />600-140 <br />110 <br />Benzene <br />6126/00 <br />100 <br />855 <br />ug/1 <br />700-130 <br />85 5 <br />Toluene <br />100 <br />807 <br />700-130 <br />80 7 <br />Ethylbenzene <br />100 <br />7 80 <br />700-130 <br />780 <br />Xylenes (total) <br />300 <br />23 4 <br />700-130 <br />780 <br />Surrogate a a a-Trifluorotoluene <br />10 0 <br />995 <br />600-140 <br />995 <br />OS <br />0060112-BS2 <br />Purgeable Hydrocarbons as Gasoline <br />6/26100 <br />250 <br />201 <br />ug/1 <br />700-130 <br />804 <br />Surrogate a,a,a-Tnfluorotoluene <br />" <br />100 <br />105 <br />11600-140 <br />105 <br />Matrix Spike <br />Benzene <br />Toluene <br />Ethylbenzene <br />Surrogate a a a -Tri luorotoluene <br />0060112-MS1 L006196-01 <br />6/26/00 100 <br />ND <br />" 100 <br />ND <br />" 100 <br />ND <br />" 300 <br />ND <br />" 100 <br />302 <br />106 ug/1 <br />600-140 <br />106 <br />10 1 <br />600-140 <br />101 <br />101 <br />600-140 <br />101 <br />302 <br />600-140 <br />101 <br />119 <br />600-140 <br />119 <br />Matrix Spike Du <br />0060112-MSD1 <br />L006196-01 <br />Bene <br />6126/00 100 <br />ND <br />11 0 ug/l <br />600-140 <br />110 <br />250 <br />370 <br />Toluene <br />too <br />ND <br />104 <br />600-140 <br />104 <br />250 <br />293 <br />Ethylbenzene <br />100 <br />ND <br />104 <br />600-140 <br />104 <br />250 <br />293 <br />Xylenes (total) <br />30 0 <br />ND <br />31 2 <br />600-140 <br />104 <br />25 0 <br />293 <br />Surrogate a,a,a-Trifluorotoluene <br />100 <br />I1 0 <br />600-140 <br />110 <br />uoiaAnalytical - San Carlos *Refer to end of report for text of notes and definitions <br />Page 3 of 5 <br />