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} <br /> 404 N Wiget lane <br /> Sequoia Walnut Creek CA 94598 <br /> 4 a- ) (925)988-9600 <br /> FAX(925)988-%73 <br /> Analytical www sequolalabs corn <br /> VP <br /> Gettler Ryan,Inc -Dublin Project Chevron <br /> 6747 Sierra Court Suite J Project Number Chevron#9-1848 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 27-Jul-01 10 26 <br /> Total Purgeable Hydrocarbons (C6-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 1G20001 - EPA 5030E P/T <br /> Blank(I G 20001-BLK5) Prepared&Analyzed 20-Jul-01 <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 /> Methyl tert-butyl ether ND 25 " <br /> Surrogate aaa-Trfluorotoluene 291 300 970 70-130 <br /> LCS(1G20001-BS1) Prepared&Analyzed 20-Jul-Ol <br /> Benzene 208 050 ug/l 200 104 70-130 <br /> Toluene 201 050 200 100 70-130 <br /> Oeozene 218 050 200 109 70-130 <br /> es(total) 613 050 600 102 70-130 <br /> Surrogate a a a-Tris luorotoluene 310 300 103 70-130 <br /> LCS(1G20001-BS2) Prepared&Analyzed 22-Jul-01 <br /> Benzene 188 050 ug/l 200 940 70-130 <br /> Toluene 186 050 200 930 70-130 <br /> Ethylbenzene 191 050 200 955 70-130 <br /> Xylenes(total) 536 050 600 893 70-130 <br /> Surrogate a,a,a-Tri luorotoluene 271 300 907 70-130 <br /> LCS(I G20001-BS3) Prepared&Analyzed 23-Jul-01 <br /> Benzene 21 5 050 ug/l 200 108 70-130 <br /> Toluene 201 050 200 100 70-130 <br /> Ethylbenzene 212 050 200 106 70-130 <br /> Xylenes(total) 591 050 600 985 70-130 <br /> Surrogate a a a-Triuorotoluene 301 300 100 70-130 <br /> oia Analytical-Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Thu analytical report must be reproduced in its entirety <br /> Page 6 of 9 <br />