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Sequoia 885 larA 5037 <br /> Morgan Hill CA 95037 <br /> (408)776 9600 <br /> �„�► Analytical FAX 782 6308 <br /> www w sequociuoialabs <br /> Gettler Ryan/Geostrategies-Dublin(Chevron) Project 575 Grant Line Rd,Tracy <br /> 6747 Sierra Court,Suite J Project Number 9-8632 Tracy Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 03/27/01 08 19 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT- Quality Control <br /> Sequoia Analytical - Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> [Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1B28003-EPA 5030B IP/TJ <br /> Blank(11328003-13LKI) Prepared&Analyzed 02/28/01 <br /> Purgeable Hydrocarbons ND 500 ug/l <br /> Benzene ND 0 500 " <br /> Toluene ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) ND 0 500 <br /> Methyl tent-butyl ether ND 2 50 " <br /> Surrogate a a a-Trtfluorotoluene 940 100 94 0 70-130 <br /> LCS(1B28003-BSI) Prepared&Analyzed 02/28/01 <br /> Benzene 839 0 500 ug/l 100 83 9 70-130 . <br /> Toluene 886 0 500 100 88 6 70-130 <br /> Ethylbenzene 939 0 500 100 939 70-130 <br /> Xylenes(total) 289 0 500 300 963 70-130 <br /> Surrogate a a a-Trilluorotoluene 966 100 966 70-130 <br /> Matnx Spike(IB28003-MSI) Source MKB0713-05 Prepared&Analyzed 02/28/01 <br /> Benzene 855 0 500 ug/l 100 ND 855 60-140 <br /> Toluene 8 64 0 500 100 ND 86 4 60-140 <br /> Ethylbenzene 8 91 0 500 100 ND 891 60-140 <br /> Xylenes(total) 28 9 0 500 30 0 ND 963 60-140 <br /> Surrogate a a a-TriJluorotoluene 976 100 976 70-130 <br /> Matrix Spike Dup(11328003-MSD1) Source MKB0713-05 Prepared&Analyzed 02/28/01 <br /> Benzene 809 0 500 ug/1 100 ND 809 60-140 553 25 <br /> Toluene 810 0 500 100 ND 81 0 60-140 645 25 <br /> Ethylbenzene 839 0 500 100 ND 839 60-140 601 25 <br /> Xylenes(total) 27 1 0 500 300 ND 903 60-140 643 25 <br /> Surrogate a a a-TriJluorotoluene 922 10 0 912 70-130 <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain aJ <br /> custody document This analytical report must be reproduced in its entirety <br /> Page Page 6 of 10 <br />