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Sequoia 404 ,CA Lane <br /> Walnut Creek,CA 94598 <br /> 4 (925)988-9600 <br /> 4DFAX(925)988-9673 <br /> WOAnalytical www sequolalabscom <br /> Gettler Ryan,Inc -Dublin Project Unocal <br /> 6747 Sierra Court Scute J Protect Number Unocal 4 0123 Reported <br /> Dublin CA, 94568 Project Manager Deanna L Harding 20-Jul-00 11 19 <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 /> mealy a Result Linut Units Level Result %REC Limits RPD Limit Notes <br /> -Batch OF28001 -EPA 5030B [PIT] <br /> Blank(OF28001-BLKI) Prepared&Analyzed 28-Jun-00 <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 acka-Tnfluorotoluene 298 300 993 70-130 <br /> LCS(OF28001-BSI) Prepared&Analyzed 28-Jun-00 <br /> Benzene 175 050— ugfl 200 875 70-130 <br /> Toluene 193 050 200 9155 70-130 <br /> Ethylbenzene 209 050 200 104 70-130 <br /> Xylenes(total) 635 050 600 106 70-130 . <br /> Surrogate c4ga-Tnfluorotoluene 254 300 84 7 70-130 <br /> LCS Dup(OF28001-BSD1) Prepared&Analyzed 28-Jun-00 <br /> Benzene 174 0 50 ug/1 200 87 0 70-130 0 573 20 <br /> Toluene 18 9 0 50 20 0 94-5-70-130 209 20 <br /> Ethylbenzene 207-0-50 200 104 70-130 0 482 20 <br /> Xylenes(total) 63-1-70-5-0 600 105 70-130 0 632 20 <br /> _ Surrogate gga-Tti luorotoluene. _ --_ _ _ 244 --- - -- --- -"-= --30 0 --813-70-130 - - - - -- -- - <br /> Batch OF28002 -EPA 5030B [PIT] <br /> Blank(OF28002-BLK1) Prepared&Analyzed 28-Jun-00 <br /> Purgeable Hydrocarbons ND 50 ug/1 <br /> Benzene ND 0 50 " <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 030 " <br /> Methyl cert-butyl ether ND 25 " <br /> Surrogate a,a;a-Tnfluorotoluene 303 300 101 70.130 <br /> Sequoia Analytical-Walnut Creek The results in tins 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 20 <br />