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1551 Industnal Road <br /> Sequoia San Carlos(650)232 9600 <br /> ���+�' Analytical FAX{650)232-9612 <br /> wunv sequoiafabs coin <br /> 96kierra-Ryan/Geostrategies(I Project Tosco(1 Court, Suite J Project Number Tosco(Unocal)SS46981 Stockton CA Reported <br /> Dublin CA, 94568 Project Manager Deanna Harding 09/27/01 10 19 <br /> Total Purgeable Hydrocarbon (C6-C12) by EPA 8015M and BTEXIMTBE 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 Lima Notes <br /> Batch 1090096- EPA 5030B(PIT) <br /> Blank(1090096-BLKI) Prepared&Analyzed 09/24/01 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/l <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl ten-butyl ether ND 50 " <br /> Surrogate a a a-Trifluorotoluene 108 100 108 70-130 <br /> LCS(1090096-BSI) Prepared&Analyzed 09/24/01 <br /> Benzene 9 82 050 ug/1 100 98 2 70-130 <br /> Toluene 9 71 050 10 0 97 1 70-130 <br /> Ethylbenzene 986 050 100 986 70-130 <br /> X es(total) <br /> 295 050 300 983 70-130 <br /> ate a,a a-Tr�uorotaluene <br /> 987 100 98 7 70-130 <br /> LCS(1090096-BS2) Prepared&Analyzed 09/24/01 <br /> Purgeable Hydrocarbons as Gasoline 224 50 ug/l 250 896 70-130 <br /> Surrogate a a,a-Trifluorotoluene 109 11100 109 70-130 <br /> Matrix Spike(1090096-MSI) Source L109082-02 Prepared&Analyzed 09/24/01 <br /> Benzene 951 050 ug/l 100 ND 95 1 60-140 <br /> Toluene 943 050 10 0 ND 943 60-140 <br /> Ethylbenzene 957 050 100 ND 95 7 60-140 <br /> Xylenes(total) 27 9 050 300 ND 93 0 60-140 <br /> Surrogate a a a-Trifluorotoluene 112 100 112 70 130 <br /> Matrix Sp ike Bu (1090096-MSD1) Source L109082-02 Prepared&Analyzed 09/24/01 <br /> Benzene 101 050 ug/l 100 ND 101 60-140 602 25 <br /> Toluene 100 050 100 ND 100 60-140 5 87 25 <br /> Ethylbenzene 101 050 100 ND 101 60-140 539 25 <br /> Xylenes(total) 300 050 300 ND 100 60-140 7 25 25 <br /> Surrogate a a a-Triuorotoluene 108 F, 100 108 70-130 <br /> SJW1a Analytical-San Carlos The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 15 of 21 <br />