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ane <br /> Sequoia 404N .CA 598 <br /> Walnut Creek,CA 94598 <br /> (925)988-9600 <br /> FAX(925)988-9673 <br /> a4- QV <br /> Analytical wwwseguolalabs corn <br /> Gettler Ryan,Inc -Dublin Project Tosco <br /> 6747 Sierra Court Suite 1 Project Number Tosco 4 11192 Reported <br /> Dublin CA,94568 Project Manager Doug Lee 29-Dec-00 16 43 <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 Limit Units Level Result %REC Limits RPD Lumt Notes <br /> Batch OL20002-EPA 5030B [P/71 <br /> Blank(OL20002-BLKI) Prepared&Analyzed 20-Dec-00 <br /> Purgeable Hydrocarbons ND 50 ug/1 <br /> Benzene ND 050 <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 050 <br /> Surrogate as a-Trifluorololuene 330 300 110 70-130 <br /> LCS(OL20002-BS1) Prepared&Analyzed 20-Dec-00 <br /> Benzene 171 0 50 uV1 200 855 70-130 <br /> Toluene 171 0 50 200 855 70-130 <br /> Ethylbenzene 168 0 50 200 840 70-130 <br /> Alklknes(total) 504 0 50 600 840 70-130 <br /> gale a a a-Tq luorotoluene _ 277 300 923 70-130 <br /> Matra Spike(OL20002-MS1) Source W012251-05 Prepared&Analyzed 20-Dec-00 <br /> Benzene 170 0 50 ug/1 200 ND 850 70-130 <br /> Toluene 167 0 50 200 ND 835 70-130 <br /> Ethylbenzene 168 0 so 200 ND 840 70-130 <br /> Xylenes(total) 502 0 50 600 ND 83 7 70-130 <br /> Surrogate a a a-Trifluorotoluene 287 300 957 70-130 <br /> Matrix Spike Dup (OL20002 MSDl) Source W012251-05 Prepared&Analyzed 20-Dec-00 <br /> Benzene 172 050 ug/l 200 ND 860 70-130 117 20 <br /> Toluene 169 050 200 ND 845 70-130 119 20 <br /> Ethylbenzene 171 050 200 ND 855 70-130 177 20 <br /> Xylenes(total) 508 050 600 ND 847 70-130 119 20 <br /> Surrogate a a a-Tnrfluorotoluene 291 300 970 70-130 <br /> emia Ail Ytical-Wa nut Creek The results in this report apply to the samples analyred in accordance with the chain of <br /> custody document.This analytual report must be reproduced in its entirety <br /> Page 4 of 6 <br />