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885 Jarvis Drive <br /> ' Morgan Hill.CA 95037 <br /> Sequoia FAX(408)776-9600 <br /> (408)782-8308 <br /> www.sequolaiabs.corn <br /> qWO Analytical <br /> Gettler Ryan/Geostrategies-Tosco/Unocal Project: - <br /> Project Number: Unocal SS#08671 Reported: <br /> 6747 Sierra Ct,Suite] 06/12/01 18:10 <br /> Dublin CA,94568 Project Manager: Deanna Harding <br /> Total Purgeable Hydrocarbons (C6-C12),BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical - Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1E31002-EPA 5030B[PIT <br /> Blank(1E31002-BLKI) Prepared&Analyzed:05/31/01 <br /> Purgeable Hydrocarbons ND 50.0 ug/l <br /> BenzeneND 8500 " <br /> Toluene ND 0.500 " <br /> Ethylbenzene ND 0.500 " <br /> Xylenes(total) ND 0.500 " <br /> Methyl ten-butyl ether ND 2.50 <br /> Surrogate:a,a,a-Trifluorotoluene 9.58 10.0 95.8 70-130 i <br /> LCS(1E31002-BSI) Prepared&Analyzed:05/31/01 <br /> Benzene 10.4 0.500 ugt] 10.0 104 70-130 <br /> Toluene 10.2 0.500 10.0 102 70-130 <br /> Ethylbenzene 10.4 0.500 " 10.0 104 70-130 <br /> Xylenes(total) 30.3 0.500 30.0 101 70-130 <br /> Surrogate:a,a,a-Tris luorotoluene 10.6 10.0 106 70-130 <br /> Matrix Spike(1E3)002-MS1) Source:MKE0706-01 Prepared&Analyzed:05/31/01 <br /> Benzene 10.5 0.500 ug/l 10.0 ND 105 60-140 <br /> Toluene 10.3 0.500 10.0 ND 103 60-140 <br /> Ethylbenzene 10.6 0.500 10.0 ND 106 60-140 <br /> Xylenes(total) 30.8 0.500 30.0 ND 103 60-140 <br /> Surrogate:a,a,a-Tris luorotoluene 10.6 10.0 106 70-130 <br /> Matrix Spike Dup(IE31002-MSD1) Source:MKE0706-01 Prepared&Analyzed:05/31/01 <br /> Benzene 10.8 0.500 ug/l 10.0 ND 108 60-140 2.$2 25 <br /> Toluene 10.6 0.500 10.0 ND 106 60-140 2.87 25 <br /> Ethylbenzene 10.9 0.500 10.0 ND 109 60-140 2.79 25 <br /> Xylenes(total) 31.8 0.500 30.0 ND 106 60-140 3.19 25 <br /> Surrogate:a,a,a-Trifluorotoluene 10.6 10.0 106 70-130 <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the cha�..of <br /> custody document. This analytical report must be reproduced in its entirety. <br /> Page Page 6 of 10 <br />