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1551 Indunnal Road <br /> Sequoia <br /> San Carton CA <br /> 23 94070 <br /> (DfG50)232 9600 <br /> FAX 4 650) t <br /> ,%W Analytical -rquojalabN Coin <br /> r-Ryan/Geostrategies(I) Protect Tosco(l) <br /> Werra Court, Suite 3 Protect Nutnber Tosco#5886 Stockton Reported <br /> 15ublin CA 94568 Project Manager Deanna Harding 05/20/02 12 25 <br /> Total Purgeable Hydrocarbon (Cb-C)2) by EPA 80151%1 and BTEX/MTBE by EPA 8021B - Quality Control <br /> Sequoia Anahrtical - San Carlos <br /> Reponing Spike source %REC RPD <br /> Analyte Re-,ult Limit Unit, Leel Result %REC Limits RPD Limit Notes <br /> Batch 2050029-EPA 5030B (PIT) <br /> Blank(2050029-BLKI) Prepared &Analyzed 05/14/02 <br /> Purgeable Hvdrocarbons as Gasoline ND 50 ugll <br /> Benzene ND 050 <br /> Toluene ND 0 50 <br /> Ethylbenzene ND 0 50 <br /> Xvlenes(total) ND 0 s0 <br /> Methyl Cert-butyl ether ND 50 <br /> Surroeaie a a a Trifluororoluene 100 100 100 70 110 <br /> LCS(2050029-BSI) Prepared&Analyzed 05/14/02 <br /> Benzene 100 0 50 ug/l 100 100 70-1 30 <br /> Toluene 943 0 50 100 94 1 70 130 <br /> Eihvlbenzene 871 0 50 100 87 1 70-130 <br /> Xvlenes(total) 25 8 0 50 300 86 0 70-110 <br /> to a a 0-Trifluororoluene 10 7 1{)U 1117 70 130 <br /> LCS(2050029 BS2) _ Prepayed&Analyzed 05/14/02 <br /> Purgeable Hydrocarbons as Gasoline 264 50 ugll 250 106 70-130 <br /> Surrogate a a a-Trifluororoluene 10 4 1100 104 70 1?U <br /> Matrix Spike(2050029-MSI) Source L205007-04 Prepared&Analyzed 05/14/02 <br /> Benzene 104 0 50 ugll 100 ND 104 60 140 <br /> Toluene 9 18 050 100 ND 91 8 60 340 <br /> Ethylbenzene 831 0 50 100 ND 83 1 60-140 <br /> xylenes(total) 247 050 300 ND 82 3 60 140 <br /> Surrogate a a a-Trifluorotoluene 110 " 100 11U 70-130 <br /> Matrix Spike Dup(2050029-P7SDI) Source L205007-04 Prepared& Analyzed 05/14/02 <br /> Benzene 117 050 ugli 100 ND 117 60-140 118 25 <br /> Toluene 102 050 100 ND 102 60-140 105 25 <br /> Ethylbenzene 930 050 100 ND 93 0 60-140 11 2 25 <br /> xylenes(total) 274 0 50 300 ND 91 3 60-140 104 25 <br /> Surrogate a a a Trifluororoluene 9 84 100 98 4 70 130 <br /> 1a Analytical -San Carlos The results in this report apply io rhe samples anahned in accordance'Aith rhe chain of <br /> cusiodi.document This anah tical repori must be reproduced in its ennret_t- <br /> Page 16 of 23 <br />