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Sequoia Walnut N wiLane <br /> t Creek CAA 94598 <br /> (925)988-9600 <br /> 5�4 Analytical FAX equo gabs.co 3 <br /> www sequolalabs Com <br /> ;tiler Ryan,Inc -Dublin Project Tosco <br /> 6747 Sierra Court Suite J Project Number Tosco# 11194 Reported <br /> Dublin CA,94568 Project Manager Doug Lee 05-Nov-01 16 07 <br /> Total Purgeable Hydrocarbons (Cb-C12), BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical - Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1331003-EPA 5030B PIT <br /> Blank(1331003-BLK1) Prepared&Analyzed 31-Oct-01 <br /> Purgeable Hydrocarbons(C6-C12) ND 50 ug/l <br /> Benzene ND 0 50 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 0 50 " <br /> Methyl Cert-butyl ether(MTBE) ND 2 5 " <br /> Surrogate aaa-Triuorotoluene 323 300 108 70-130 <br /> Blank(1J3]003-BLK2) Prepared&Analyzed 01-Nov-01 <br /> Purgeable Hydrocarbons(C6-C12) ND 50 ug/l <br /> Benzene ND 050 " <br /> Toluene ND 0 50 " <br /> enzene ND 0 50 <br /> es(total) ND 050 " <br /> Methyl tert-butyl ether(MTBE) ND 25 " <br /> Surrogate aaa-Truorotoluene 365 300 122 70-130 <br /> Blank(1J31003-BLK3) Prepared&Analyzed 02-Nov-01 <br /> Purgeable Hydrocarbons(C6-C12) ND 50 ug/l <br /> Benzene ND 0 50 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether(MTBE) ND 25 " <br /> Surrogate a,a,a-Triuorwoluene 327 300 109 70-130 <br /> Blank(1331003-BLK4) Prepared 05-Oct-01 Analyzed 05-Nov-01 <br /> Purgeable Hydrocarbons(C6-C12) ND 50 ug/1 <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 0 50 " <br /> Methyl ten-butyl ether(MTBE) ND 2 5 " <br /> I <br /> Surrogate a a a-Triuorotoluene 315 300 105 70-130 <br /> Sequoia Analytical-Walnut Creek The results in this report apply to the samples analyzed to accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 4 of 7 <br /> I <br />