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404 N Wiget lane <br /> Sequoia Walnut Geek C8 94598 <br /> (925)988-9600 <br /> FAX(925)98B-9673 <br /> 1,ff Analytical "' "°'a' `°r' <br /> ler Ryan,Inc -Dublin Project Chevron <br /> 47 Sierra Court Suite J Project Number Chevron#9-2033 Reported <br /> Dublin CA,94568 Project Manager Deanna L Hardmg 29-Jun-00 16 29 <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 Lutist Units Level Result %REC Limits RPD Lunit Notes <br /> Batch OF09003 -EPA 5030B 1PM <br /> Blank(OF09003-BLKI) Prepared&Analyzed 09-Jura-00 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 050 " <br /> Toluene ND 0 50 <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 <br /> Methyl tett-butyl ether ND 2 5 " <br /> Surrogate a:ga•Tnfluorololuene 346 300 115 70-130 <br /> LCS(OF09003-BSI) Prepared&Analyzed 09-Jun-00 <br /> Benzene 200 050 ug/l 200 100 70-130 <br /> Toluene 203 0 50 200 101 70-130 <br /> Elhylbenzene 207 050 " 200 l04 70-130 <br /> X lenes(total) 593 050 600 988 70-130 <br /> gale 990-Tnfluorotoluene 28 4 300 947 70-130 <br /> LCS Dup (OF09003-BSD1) Prepared&Analyzed 09-Jun-00 <br /> Benzene 191 050 ug/1 200 95 5 70-130 460 20 <br /> Toluene 19 3 050 200 965 70-130 505 20 <br /> Ethylbenzen+e 195 0 50 200 975 70-130 597 20 <br /> Xylenes(tote!) 566 050 600 943 70-130 466 20 <br /> Surrogate qaa-Trifluonutoluene 178 300 917 70-130 <br /> Batch OF12006-EPA 5030B [Pfn <br /> Blank(OF12006-BLKI) Prepared&Analyzed 09-Jun-00 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 0 50 " <br /> Toluene ND 050 " <br /> Myibenzene ND 050 " - <br /> Xyleaes(total) ND 050 " <br /> Mdhyl telt butyl ether ND 25 " <br /> Surrogate µat a-Tnfluorotohtene 288 300 960 70-130 <br /> Sequoia Analytical-Walnut Creek The results to flus report apply to the samples analyzed to accordance with the churn a <br /> custody document Thus analytical report must be reproduced in its entirely <br /> Page 10 of 21 <br />