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Sequoia San Carlos an CarlosCA Industrial Road <br /> 94070 <br /> (650)23 2-9600 <br /> Analytical FAX(650)232-9612 <br /> www sequoialabs co com „ <br /> Gettler-Ryan/Geostrategies(1) Protect Tosco(1) <br /> 6747 Sierra Court,Suite J Protect Number Tosco#4409,Stockton Reported <br /> Dublin CA,94568 Protect Manager Deanna Harding 05/03/02 10 10 <br /> Total Purgeable Hydrocarbon (C6-C12) by EPA 8015M and BTEX/MTBE by EPA 8021B - Quality Control <br /> Sequoia Analytical - San Carlos <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limns RPD Limit Notes <br /> Balch 2040089-EPA 5030B(PIT) <br /> Blank(2040089-BLKI) Prepared&Analyzed 04/29/02 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/I <br /> Benzene ND 050 <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 0 50 " <br /> Methyl tert-butyl ether ND 50 <br /> Surrogate a a a-Tris luorotoluene 9 89 100 98 9 70-130 <br /> LCS(2040089-BSI) Prepared&Analyzed 04/29/02 <br /> Benzene 108 0 50 ug/l 100 108 70-130 <br /> Toluene 964 050 10 0 964 70-130 <br /> Ethylbenzene 940 050 10 0 940 70-130 <br /> Xylenes(total) 277 050 300 923 70-130 <br /> Surrogate a a a-Tri luorotoluene 106 100 106 70-130 <br /> LCS(2040089-BS2) Prepared&Analyzed 04/29/02 <br /> Purgeable Hydrocarbons as Gasoline 261 50 ugll 250 104 70-130 <br /> Surrogate a a a-Triuorotoluene 112 11100 112 70-130 <br /> Matrix Spike(2040089-MSI) Source L204085-05 Prepared&Analyzed 04/30/02 <br /> Benzene 9 87 050 ug/1 10 0 ND 987 60-140 <br /> Toluene 999 050 10 0 ND 999 60-140 <br /> Ethylbenzene 105 050 100 ND 105 60-140 <br /> Xylenes(total) 31 4 050 300 ND 105 60-140 <br /> Surrogate a a a-TriJluorotoluene 100 100 100 70-130 <br /> Matrix Spike Dup(2040089-MSD1) TSource L204085-05 Prepared&Analyzed 04/30/02 <br /> Benzene 958 0 50 ug/I 100 ND 958 60-140 298 25 <br /> Toluene 978 050 10 0 ND 978 60-140 2 12 25 <br /> Ethylbenzene 102 0 50 100 ND 102 60-340 290 25 <br /> Xylenes(total) 308 050 300 ND 103 60-140 193 25 <br /> Surrogate a a a-Trifluorotoluene 947 100 947 70-130 <br /> Sequoia Analytical- San Carlos The results in this report apply to the samples analyzed in accordance with the chain CW <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 10 of 16 <br />