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Industrial Road <br /> Sequoia SanSCarlos CA 94070 <br /> f (650)232%00 <br /> a— ) <br /> W Analytical FAX(650)232%12 <br /> www sequoialabs corn <br /> Gettler-Ryan/Geostrategies(1) Project TOSCO(8) <br /> 6747 Sierra Court,Suite J Project Number Tosco#6981,Stockton,CA Reported <br /> Dublin CA,94568 Project Manager Scott Polston 09/24/01 12 53 <br /> - Total Purgeable Hydrocarbons (C6-C12) by EPA 8015M and BTEX by EPA 8021B- Quality Control <br /> Sequoia Analytical - San Carlos <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1090078-EPA 50308 P <br /> Blank(1090078-BLK1) Prepared&Analyzed 09/20/01 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/l <br /> Benzene ND 0 50 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Surrogate aa a-Trifluorotoluene 9 21 100 921 60-140 <br /> LCS(1090078-BSI) Prepared&Analyzed 09/20/01 <br /> Benzene 960 050 ug/1 10 0 960 70-130 <br /> Toluene 949 050 10 0 949 70-130 <br /> Ethylbenzene 9 65 050 10 0 965 70-130 <br /> Xylenes(total) 28 6 0 50 300 95 3 70-130 <br /> Surrogate a a a-TrCfluorotoluene 9 76 100 976 60-140 <br /> LCS(1090078-BS2) Prepared&Analyzed 09/20/01 <br /> Purgeable Hydrocarbons as Gasoline 214 50 ug/! 250 856 70-130 <br /> Surrogate a,a a-Tr7fluorotoluene 102 " 100 102 60-140 <br /> Matrix Spike(1090078-MSI) Source L109048-02 Prepared&Analyzed 09/20/01 <br /> Purgeable Hydrocarbons as Gasoline 254 50 ugll 250 ND 102 60-140 <br /> Surrogate a a a-Trifluorotoluene 115 11100 115 60-140 <br /> Matrix Spike Dup(1090078-MSD1) Source L109048-02 Prepared&Analyzed 09/20/01 <br /> Purgeable Hydrocarbons as Gasoline 250 50 ugll 250 ND 100 60-140 159 25 <br /> Surrogate aa a-Trifluorotoluene 109 11100 109 60-140 <br /> Scquota Analytical- San Carlos The results in this report apply to the samples analyzed in accurdance with the chair:of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 4 of 6 <br />