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404 N Wiget Lane <br /> Walnut Creek CA 94598 <br /> Sequoia (925)%8-96M <br /> FAX(925)988-%73 <br /> Analytical www sequolalabs corn <br /> 40 <br /> Gettler Ryan,Inc -Dublin Project Chevron <br /> 6747 Sierra Court Suite 1 Project Number Chevron 4 9-2033 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 04-Sep-Ol 11 14 <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 1 H24002-EPA 5030B P/T <br /> LCS(1H24002-BS2) Prepared&Analyzed 27-Aug-Ol <br /> Benzene 183 050 ug/1 200 91 5 70-130 <br /> Toluene 191 0 50 " 200 95 5 70-130 <br /> Ethylbenzene 197 050 200 985 70-130 <br /> Xylenes(total) 591 050 600 985 70-130 <br /> Surrogate <br /> aa a-Trtuorotoluene 292 300 973 70-130 <br /> LCS(1H24002-BS3) Prepared&Analyzed 28-Aug-01 <br /> Benzene 179 0 50 ug/1 200 895 70430 <br /> Toluene 188 0 50 200 940 70-130 <br /> Ethylbenzene 196 050 200 980 70-130 <br /> Xylenes(total) 58 6 050 600 977 70-130 <br /> to aaa-Trrfluorotoluene 293 300 977 70-130 <br /> Matrix Spike(1H24002-MSI) Source W108316-03 Prepared&Analyzed 24-Aug-01 <br /> Benzene 173 050 ug/l 200 ND 865 70-130 <br /> Toluene 184 0 50 200 ND 920 70-130 <br /> Ethylbenzene 189 050 200 ND 945 70-130 <br /> Xylenes(total) 563 050 600 ND 938 70-130 <br /> Surrogate a a a-TrIuorotoluene 295 300 983 70-130 <br /> Matrix Spike Dup(1H24002-MSDI) Source W108316-03 Prepared&Analyzed 24-Aug-Ol <br /> Benzene 193 050 ug/1 200 ND 905 70-130 109 20 <br /> Toluene 203 050 200 ND 102 70-130 982 20 <br /> Ethylbenzene 210 050 200 ND 105 70-130 105 20 <br /> Xylenes(total) 619 050 600 ND 103 70-130 948 20 <br /> Surrogate a,a a-Tr�uorotoluene 295 " 300 983 70-130 <br /> 1a 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 be reproduced in its entirety <br /> Page 12 of 26 <br />