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404 N Wlget Lane <br /> Sequoia Walnut Geek CA 94598 <br /> (925)988-9600 <br /> FAX(925)9813-9673 <br /> Analytical wwwsequolas corn <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 Harduâ–ºg 09-Mar-01 10 25 <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 1C06001 -EPA 5030B[PIT] <br /> Blank(1C06001-BLKI) Prepared&Analyzed 06-Mar-01 <br /> Purgeable Hydrocarbons ND 50 ug/I <br /> Benzene ND 050 " <br /> Toluene ND 050 <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 0 50 " <br /> Methyl tent-butyl ether ND 25 <br /> Surrogate gixa-Tri luorotoluene 312 300 104 70-130 <br /> LCS(IC06001-BS1) Prepared&Analyzed 06-Mar-01 <br /> Benzene 193 050 ug/l 200 965 70-130 <br /> Toluene 204 050 200 102 70430 <br /> Ethylbenzene 214 050 200 107 70-130 <br /> Xylenes(total) 633 050 600 105 70-130 <br /> Surrogate q q o-Trifluorotoluene 294 300 9R 0 70-130 <br /> Matrix Spike(1C06001-MS1) Source W102554-04 Prepared&Analyzed 06-Mar-01 <br /> Benzene 175 050 ug/1 200 ND 875 70-130 <br /> Toluene 184 050 200 ND 920 70-130 <br /> Ethylbenzene 193 050 200 ND 965 70-130 <br /> Xylenes(total) 582 050 600 ND 970 70-130 <br /> Surrogate a 4 a-Trii luorotoluene 295 300 983 70-130 <br /> Matrix Spike Dup(1C06001-MSDI) Source W102554-04 Prepared&Analyzed 06-Mar-01 <br /> Benzene 176 050 ugA 200 ND 880 70-130 0 570 20 <br /> Toluene 186 050 200 ND 930 70-130 108 20 <br /> Ethylbenzene 194 050 200 ND 970 70-130 0 517 20 <br /> xylenes(total) 59 1 050 600 ND 985 70-130 153 20 <br /> Surrogate a a a-Trii luorotoluene 285 300 950 70-130 <br /> Sequoia Analytical-Walnut Creek The results in this report apply to the samples analyzed to accordance with the Chaino <br /> custody documeirt This anolytical report must be reproduced in its ent)reb <br /> Page 5 of 6 <br />