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41) Sequoia 404 N Wlget Lane <br /> Walnut Creek,CA 94598 <br /> I%ff Analytical FAX(925)988-(925)988-96%00 <br /> 73 <br /> Gettier Ryan/Geosttategies-Dublin Project Unocal <br /> 6747 Sierra Court Suite J Project Number Farmer Unocal SS#0187 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 03-Sep-99 10 23 <br /> Total Purgeable Hydrocarbons (C6-C12) and BTEX by DHS LUFT- Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Reporting Spike Source °/QREC RPD <br /> Analyte Result Lunn Units Level Result %REC Limits RPD Lumt Notes <br /> Batch 9I01010: Prepared 31-Aug-99 Using EPA 5030E [Pr'17 <br /> LCS(9I01010-BSl) <br /> Benzene 211 050 ugll 200 106 70-130 <br /> Toluene 213 050 200 106 70-130 <br /> Ethylbenzene 213 050 " 200 <br /> 106 70-130 <br /> Xylenes(total) 670 050 600 112 70-130 <br /> Surrogate a as-Th luorotoluene 273 300 910 70.130 <br /> Matrix Spike(9I01010-MSI) Source W908425-02 <br /> Benzene 196 050 ug/I 200 ND 980 70-130 <br /> Toluene 196 050 200 ND 980 70-130 <br /> Ethvlbenzene 194 0 50 200 ND 970 70-130 <br /> XvIcnes(total) 609 050 600 ND 102 70-130 <br /> Surrogate a a a-Tnfluorotolueue 18 3 300 943 -0-1.)o • <br /> M itrir Spike Dup (9101010-MSDI) Source W908425-02 <br /> Benzene 197 050 ug/l 2U 0 ND 98 5 70-130 0 509 20 <br /> Toluene 19 8 030 200 ND 990 70-130 1 02 20 <br /> Ethylbenzene 19 4 0 50 200 ND 970 70-130 0 20 <br />`{vlenes(total) 61 4 0 50 600 ND 102 70-130 0 818 20 <br /> Surrogate as a-Tnfluorotolueue 25 9 300 863 10-150 <br /> Sequoia Analytical- Walnut Creek The resvltr in this report apply 10 the smnples analysed rn accordance with the ch vn of <br /> curtodydocument This analyecalreport nwrrberep rodacedinrtrerrirery <br /> 77 <br /> n Feg Icy, Proje—" u ger <br /> Page 4 of 5 <br />