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Sequoia <br />� Analytical <br />1551 Industrial Road <br />San Carlos CA 94070-4111 <br />(650) 232-9600 <br />FAX (650) 232-9612 <br />www sequoialabs corn <br />Gettler-Ryan/Geostrategles(1) Project Chevron(l) Sampled 6111/U0 <br />6747 Sierra Court, Suite J Project Number Chevron 9-5775 Received 6123100 <br />Dublin, CA 94568 Project Manager Scott Polston Lq2rted 6/28100 <br />Total Purgeable Hydrocarbons (C6 -C12) and BTEX by DHS LUFI'/Quality Control <br />Sequoia Analytical - San Carlos <br />Date Spike Sample QC Reporting Limit Recov RPD RPD <br />Analyte Analyzed Level Result Result Units Recov Limits % Limit "/o Notes* <br />Batch 0060112 Date Preoared 6126100 <br />0060112 -BSI <br />Extraction Method EPA 50308 WTI <br />Blank 0060112-BLK1 <br />Benzene <br />Purgeable Hydrocarbons as Gasoline 6126100 <br />ND <br />ug/l 500 <br />Benzene <br />ND <br />0 500 <br />Toluene <br />ND <br />0 500 <br />Ethylbenzene <br />ND <br />0 500 <br />Xylenes (total) <br />ND <br />0 500 <br />Surrogate a a a-Trrfluorotoluene 100 <br />10 7 <br />600-140 107 <br />LCS <br />" <br />0060112 -BSI <br />L006196-01 <br />Benzene <br />6126100 100 <br />855 ug/l <br />700-130 <br />855 <br />Toluene <br />100 <br />807 <br />700-130 <br />80 7 <br />Ethylbenzene <br />10 0 <br />780 <br />700-130 <br />780 <br />Xylenes (total) <br />300 <br />23 4 <br />700-130 <br />78 0 <br />Surrogate a,a a-Tnfluorotoluene 100 995 600-140 995 <br />0060112-BS2 <br />Purgeable Hydrocarbons as Gasoline 6126/00 250 201 ug/I 700-130 804 <br />Surrogate a,a,a-Tnjluorotoluene 100 105 600-140 105 <br />Matrix Spike <br />0060112 -MSI <br />L006196-01 <br />Benzene <br />6/26100 <br />100 <br />ND <br />10 6 <br />ug/l <br />600-140 <br />106 <br />Toluene <br />10 0 <br />ND <br />101 <br />600-140 <br />101 <br />Ethylbenzene <br />10 0 <br />ND <br />101 <br />600-140 <br />101 <br />Xylenes (total) <br />300 <br />ND <br />302 <br />600-140 <br />101 <br />Surrogate a ax-TriJluorotolaene <br />" <br />100 <br />119 <br />600-140 <br />119 <br />Matrix Spike Dup <br />0060112-MSDI <br />1,006196-01 <br />Benzene <br />6126/00 <br />100 <br />ND <br />110 <br />ug/l <br />60 0-140 <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 />too <br />ND <br />104 <br />600-140 <br />104 <br />250 <br />293 <br />Xylenes (total) <br />300 <br />ND <br />31 2 <br />600-140 <br />104 <br />250 <br />293 <br />Surrogate a a,a-Tnfluorotoluene <br />10 0 <br />Il 0 <br />600-140 <br />110 <br />�a Analytical - San Carlos `Refer to end of report for text of notes and definitions <br />Page 3 of 5 <br />