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1 404 N Wiget Lane <br /> Walnut Creek CA 94598 <br /> Sequoia (925)988-9600 <br /> 4 FAX(925)988-%73 <br /> Analytical _ www sequolalabs Com <br /> aw <br /> Gettler Ryan,Inc -Dublin Project Chevron <br /> 6747 Sierra Court Suite J Project Number Chevron#1 9-2033 Reported <br /> Dublin CA,94568 Project Manager Deanna L Hording 15-Jun-01 10 47 <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 1E25001-EPA 5030B P/T <br /> LCS(1E25001-BS1) Prepared&Analyzed 25-May-01 <br /> Benzene 213 0 50 ug/l 200 106 70-130 <br /> Toluene 212 050 200 106 70-130 <br /> Ethylbenzene 23 2 0 50 200 116 70-130 <br /> Xylenes(total) 648 0 50 600 108 70-130 <br /> Surrogate 44o-Tnfluorotoluene 28 7 30 0 95 7 70-130 <br /> LCS(1E25001-BS2) Prepared&Analyzed 29-May-01 <br /> Benzene 206 0 50 ugA 200 103 70-130 <br /> Toluene 203 0 50 20 0 102 70430 <br /> 'Ethylbenzene 206 0 50 200 103 70-130 <br /> Xylenes(total) 580 0 50 600 967 70-130 <br /> gate a,aa•Tri luorotoluene 254 300 84 7 70-730 <br /> LCS(IE25001-BS3) Prepared&Analyzed 30-May-01 <br /> Benzene 229 0 50 ug/l 200 114 70-130 <br /> Toluene 229 0 50 " 200 114 70-130 <br /> Ethylbenzene 23 1 0 50 200 116 70-130 <br /> Xylenes(total) 658 0 50 600 110 70.130 <br /> Surrogate 44a-Tnfluorotoluene 31 6 300 105 70-130 <br /> LCS(1E25001-BS4) Prepared&Analyzed 31-May-01 <br /> Benzene 19 6 0 50 ug/l 200 980 70-130 <br /> Toluene 192 0 50 200 960 70-130 <br /> Ethylbenzene 200 0 50 200 100 70-130 <br /> Xylenes(total) 56 6 0 50 600 943 70-130 <br /> Surrogate 4 a4a-Tnfluorotoluene 305 300 102 70-I30 <br /> Matrix Spike(1E25001-MS1) Source W105406-03 Prepared&Analyzed 25-May-01 <br /> Benzene 219 0 50 ugfl 200 ND 110 70-130 <br /> Toluene 204 050 200 ND 102 70-130 <br /> Ethylbenzene 209 050 200 ND 104 70-130 <br /> Xylenes(total) 596 050 600 ND 977 70-130 <br /> Surrogate a,a,a-Tnfluorotoluene 277 300 923 70.130 <br /> Uoia Analytical-Walnut Creels 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 24 <br />