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14 Sequoia <br />VO- Analytical <br />I* <br />1551 Industnal Road <br />San Carlos CA 94070-4111 <br />(650) 232-9600 <br />FAX (650) 232-9612 <br />www sequoialabs com <br />Gettler-Ryan/Geostrategies(1) Project Chevron(1) Sampled 6129100 <br />6747 Sierra Court, Suite J Project Number Chevron 9-5775 Received 6130100 <br />Dublin, CA 94568 Project Manager Scott Polston Reported 7/5100 _ <br />Total Purgeable Hydrocarbons (C6 -C12) and BTEX by DHS LUFT/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 % Notes' <br />Batch 0070005 <br />Date Prepared 713/00 <br />700-130 <br />Extraction Method EPA 5030B IP/TI <br />^ <br />Blank <br />0070005-BLKI <br />700-130 <br />962 <br />Purgeable Hydrocarbons as Gasoline <br />7/3100 <br />ND <br />ug/1 500 <br />Benzene <br />299 <br />ND <br />0 500 <br />Toluene <br />100 <br />ND <br />0 500 <br />Ethylbenzene <br />114 <br />ND <br />0 500 <br />Xylenes (total) <br />too <br />ND <br />0 500 <br />Surrogate a,a a-Tnfluorotoluene <br />100 <br />897 <br />600-140 89 7 <br />LCS 0070005-BS1 <br />Benzene 7/3/00 <br />Toluene " <br />Ethylbenzene " <br />too <br />105 ug/1 <br />700-130 <br />105 <br />100 <br />962 <br />700-130 <br />962 <br />too <br />979 <br />700-130 <br />979 <br />300 <br />299 <br />700-130 <br />997 <br />Surrogate a,a a-Tnfluorotoluene " 100 101 600-140 101 <br />I&S 0070005-BS2 <br />Purgeable Hydrocarbons as Gasoline 7/3100 250 247 ug/l 700-130 988 <br />Surrogate a s a-Tnfluorotoluene 100 953 0600-140 953 <br />Matrix SDlke <br />0070005 -MSI <br />L006175-03 <br />Benzene <br />7/3/00 100 <br />ND <br />119 ug/I <br />600-140 <br />119 <br />Toluene <br />100 <br />ND <br />114 <br />600-140 <br />114 <br />Ethylbenzene <br />too <br />ND <br />1 1 3 <br />600-140 <br />113 <br />Xylenes (total) <br />300 <br />ND <br />344 <br />600-140 <br />115 <br />Surrogate a a,a-Tnfluorotoluene <br />100 <br />106 <br />600-140 <br />106 <br />Matrix Swke Du <br />0070005-MSD1 <br />L006175-03 <br />Benzene <br />7/3/00 100 <br />ND <br />11 8 ug/I <br />600-140 <br />118 <br />250 <br />0 844 <br />Toluene <br />100 <br />ND <br />112 <br />600-140 <br />112 <br />250 <br />177 <br />Ethylbenzene <br />100 <br />ND <br />11 2 <br />600-140 <br />112 <br />250 <br />0 889 <br />Xylenes (total) <br />300 <br />ND <br />33 8 <br />600-140 <br />113 <br />250 <br />175 <br />Surrogate a,a a-Tnfluorotoluene <br />100 <br />102 <br />600-140 <br />102 <br />uoIa Analytical - San Carlos *Refer to end of report for text of notes and definitions <br />Page 4 of 6 <br />