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404 N Wiget lane <br /> Walnut Creek,CA 94598 <br /> Sequoia (925)988'9600 <br /> (INFAX(925)988-9673 <br /> AFOAnalytical www sequolalabs coin <br /> Gettler Ryan,Inc -Dublin Project Tosco <br /> 6747 Sierra Court Suite 7 Project Number Tosco# 11192 Reported <br /> Dublin CA,94568 Project Manager W Skip McIntosh 01-Dec-00 15 57 <br /> Total Purgeable Hydrocarbons (C6-C12) and BTEX by DHS LUFT- Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Lmut Units Level Result %REC Limits RPD Limit Notes <br /> Batch OK29001 -EPA 5030B [Pr" <br /> Blank(OK29001-BLKl) Prepared&Analyzed 29-Nov-00 <br /> Purgeable Hydrocarbons ND 50 ug/l. <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Surrogate aaa-Trrfluorotoluene 301 300 100 70-130 <br /> LCS(OK29001-BSI) Prepared&Analyzed 29-Nov-00 <br /> Benzene 198 050 ug/1 200 990 70-130 <br /> Toluene 203 050 200 101 70-130 <br /> Ethylbcnzene 213 050 200 106 70-130 <br /> YAgIbLes(total) 632 050 600 105 70-130 <br /> 3 gate q q anTrrfluorotoluene 293 300 977 70-130 <br /> Matrix Spike(OK29001-MSI) Source W011381-07 Prepared&Analyzed 29-Nov-00 <br /> Benzene 174 050 ugn 200 ND 87 0 70-130 <br /> Toluene 182 0 50 200 ND 910 70-130 <br /> Ethylbenzene 198 0 50 200 ND 940 70-130 <br /> Xylenes(total) 574 050 600 ND 957 70-130 <br /> Surrogate aaa-Tnfluorotoluene 296 300 987 70-130 <br /> Matrix Spike Dup (OK29001-MSDl) Source W011381-07 Prepared&Analyzed 29-Nov-00 <br /> Benzene 168 0 50 ug/l 200 ND 840 70-130 351 20 <br /> Toluene 178 050 200 ND 890 70-130 222 20 <br /> Ethylbenzene 184 0 50 200 ND 920 70-130 2 15 20 <br /> Xylenes(total) 563 0 50 600 ND 93 8 70-130 193 20 <br /> Surrogate zaa-Tr7Jluorotoluene 291 300 970 70-130 <br /> �101a Allaiytlt al-Walnut Creek The results in rhrs report apply to the samples anal med in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 4 of 6 <br />