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iSequoia 404 N Wget Lane <br /> Walnut Creek CA 94598 <br /> Analytical FAX(925)988-967730 <br /> 7ettler Ryan,Inc -Dublin Project Unocal <br /> 6747 Sierra Court Suite 7 Project Number Unocal 4 5886 Reported <br /> G <br /> Dublin CA,94 568 Project Manager Deanna L Harding 16-Dec-99 09 Ol <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 Lutut Units Level Result %REC Lints RPD Limn Notes <br /> Batch 9LO6001 Prepared 06-Dec-99 Using EPA 5030B [PITT <br /> Blank(9L06001-BLKI) <br /> Purgeable Hydrocarbons ND 50 ug/1 <br /> Benzene ND 050 " <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 25 " <br /> Surrogate a a a-Trtfluorotoluente 32 7 300 109 70-130 <br /> LCS(9L06001-BS1) <br /> Benzene 189 050 ug/1 200 945 70-130 <br /> frne 185 050 200 925 70-130 <br /> ]benzene 161 0 50 200 805 70-130 <br /> Xylenes(total) 577 0 50 600 962 70-130 <br /> Surrogate a a a-Tri luormoluene 306 300 102 70-130 <br /> Matrix Spike(9L06001-MSI) Source W911665-10 <br /> Benzene 181 050 ug/1 200 ND 905 70-130 <br /> Toluene 182 050 200 ND 910 70-130 <br /> Ethylbenzene 162 050 200 ND 810 70-130 <br /> Xylenes(total) 566 050 600 ND 943 70-130 <br /> Surrogate a q a-Trruorotoluene 280 300 933 70-130 <br /> Matrix Spike Dup (9L06001-MSDI) Source W911665-10 <br /> Benzene 198 050 ug/l 200 ND 990 70-130 897 20 <br /> Toluene 200 030 200 ND 100 70-130 942 20 <br /> Ethylbenzene 185 050 20 0 ND 92 5 70-I30 133 20 <br /> Xylenes(total) 62 3 0 50 600 ND 104 70-130 959 20 <br /> Surrogate aaa-Trifluorwoluene 297 300 990 70-130 <br /> �uola Analytical-Walnut Creek The results m Iles report apply to the smnples analy2ed i n accordance with the churn of <br /> custody document This analytical report must he reproduced nit its entirety <br /> u dime eg ey, aJecl anagen <br /> Page 21 of 27 <br />