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444 N Wiget Lane <br /> Sequoia Walnut (925)9 94598 <br /> 1 4 FAX(925)988-9673 <br /> Analytical www seyuolalabs com <br /> Gettler Ryan,Inc -Dublin Project Unocal <br /> 6747 Sierra Court Suite J Project Number Unocal#0187 Reported <br /> Dublin CA,94568 Project Manager P Le Chernmant 27-Dec-00 07 45 <br /> Total Purgeable Hydrocarbons (C6-Cl2), BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical - Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analvte Result Linut Units Level Result %REC Luntts RPD Litxut Notes <br /> Batch OL20002 - EPA 5030B [P/TJ <br /> Blank(OL20002-BLK1) Prepared&Analyzed 20-Dec-00 <br /> Purgeable Hvdrooarbons ND 50 ug/l <br /> Benzene ND 050 " <br /> Toluene ND 050 <br /> Ethylbenzene ND 0 50 <br /> Xylenes(total) ND 050 <br /> Methyl tert-butvl ether ND 2 5 <br /> Surrogate aaa-Trlfluorotoluene 330 300 110 70-130 <br /> LCS(OL20002-BSI) Prepared&Analyzed 20-Dec-00 <br /> Benzene 171 050 ugll 200 85 5 70-130 <br /> Toluene 171 0 50 200 855 70-130 <br /> Wyl <br /> lbenzene 16 8 0 50 200 840 70-130 <br /> nes(total) 504 0 50 600 840 70-130 <br /> Surrogate a a a-Trifluorotoluene 277 300 92 3 70-130 <br /> Matrix Spike(OL20002-MSI) Source W012251-05 Prepared&Analyzed 20-Dec-00 <br /> Benzene 170 050 ug/1 200 ND 850 70-130 <br /> Toluene 167 050 200 ND 815 70430 <br /> Ethvlbenzene 16 8 050 200 ND 840 70-130 <br /> Xvlenes(total) 502 0 50 600 ND 83 7 70-130 <br /> Surrogate aaa-Tr7fluorwoluene 28 7 300 957 70-130 <br /> Matrix Spike Dup(OL20002-MSDI) Source W012251-05 Prepared&Analyzed 20-Dec-00 <br /> Benzene 172 0 50 ug/1 200 ND 860 70-130 1 t7 20 <br /> Toluene 16 9 050 200 ND 845 70-1[30 1 19 20 <br /> Ethylbenzene 171 0 50 200 ND 855 70-130 177 20 <br /> Xylenes(total) 50 8 050 600 ND 847 70-130 1 19 20 <br /> Surrogate a a a-Tr fluorotoluene 291 300 970 70-130 <br /> uoia Analytical-Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must he reproduced in its entirety <br /> Page 5 of 6 <br />