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404 N Wiget Lane <br /> FAX Sequoia Walnut Creek,CA 94598 <br /> Analytical (925)988-9D600 <br /> (925)988-9673 <br /> VO <br /> filer Ryan,Inc -Dublin Project. Unocal <br /> 6747 Sierra Court Suite J Project Number Unocal SS#2859 Reported <br /> fhtblin CA,94568 Project Manager Deanna L Harding 08-Sep-99 18 13 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and 1VITBE by DHS LUFT- Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Lmut Units Level Result %REC Limits RPD Limit Notes <br /> Batch 9101011: Prepared 31-Aug-99 Using EPA 5030B [PII J <br /> Blank(9I01011-BLKI) <br /> Purgeable Hydrocarbons ND 50 ug1I <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Surrogate aaa-Tnfluarotoluene 278 300 927 70-130 <br /> LCS(9I01011-BS1) <br /> Benzene 23 6 050 ugfl 200 118 70-130 <br /> Toluene 22 3 050 200 ill 70-130 <br /> Ethylbenzene 215 050 200 108 70.130 <br /> w es(total) 651 0 50 600 108 70-130 <br /> gate aaa-Tnfluorotoluene 322 300 10- 70-130 <br /> Matrix Spike(9101011-MSI) Source W908448-04 <br /> Benzene 24 4 050 ugil 200 ND 122 70-130 <br /> 'toluene 230 030 " 200 ND 115 70-130 <br /> Ethylbenzcne 224 050 200 ND 112 70-130 <br /> Xylenes(total) 674 050 600 ND 112 70-130 <br /> Surrogate aaa-Tnfluorotoluerre 198 300 993 70-130 <br /> Matrix Spike Dup(9I01011-MSDI) Source W908448-04 <br /> Benzene 241 050 ugll 200 ND 121 70-130 1 24 20 <br /> Toluene 22.8 030 200 ND 114 70-130 0 873 20 <br /> Ethylbenzene 223 050 200 ND Ill 70-130 0 447 20 <br /> Xylenes(total) 672 0 50 600 ND 112 70.130 0 297 20 <br /> Surrogate a a a-Tnfluorotoluerte 295 300 981 70-130 <br /> Sequoia Analytical-Walnut Creek The results to tins report apply to rhe umples armly=d r n accordance with the chart of <br /> custody doewnenit Thu amlyacal report muir be reproduced to t&onarery <br /> u e eg ey, Project Mamdkr f Page 4 of 5 <br />