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404 N Wlget Lane <br /> Sequoia Walnut Cr9)X949600 <br /> FAX(92S)988-9673 <br /> Analytical www sequolalabs corn <br /> Gettler Ryan,Inc -Dublin Project Chevron <br /> 6747 Sierra Court Suite J Project Number Chevron#9-9840 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 13-Mar-01 16 55 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Reportmg Spike Source %REC RPD <br /> Analyte Result Lurut Units Level Result %REC Limits RPD Lumt Notes <br /> Batch 1C09001 -EPA 5030B IP/T] <br /> Blank(IC09001-BLKI) Prepared&Analyzed 09-Mar-01 <br /> Purgeable Hydrocarbons ND 50 ug/l. <br /> Benzene ND 0 50 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 0 50 " <br /> Methyl tent-butyl ether ND 25 " <br /> Surrogate aaa-Tnfluoroioluene 300 300 100 70.130 <br /> LCS(IC09001-BS1) Prepared&Analyzed 09-Mar-03 <br /> Benzene 208 0 50 ugfl 200 104 70-130 <br /> Toluene 215 0 50 20 0 108 70-130 <br /> 7thlbenzene 225 0 50 200 113 70-130 <br /> (� 1) 666 0 50 600 111 70-130 <br /> Surrogate a a a-Tnfluorotoluene 290 300 96 7 70-130 <br /> Matrix Spike(lC09001-MSI) Source W102609-02 Prepared&Analyzed 09-Mar-01 <br /> Benzene 174 050 ug/l 200 ND 870 70-130 <br /> Toluene 180 0 50 " 200 ND 900 70-130 <br /> Ethylbenzene 199 0 50 200 ND 945 70-130 <br /> Xylenes(tom) 565 050 600 ND 942 70-130 <br /> Surrogate aaa-Tnfluorotoluene 300 300 100 70-130 <br /> Matrix Spike Dup(1C09001-MSD1) Source W102609-02 Prepared&Analyzed 09-Mar-0l <br /> Benzene 171 050 ug/l 200 ND 955 70-130 174 20 <br /> Toluene 176 0 50 200 ND 880 70-130 225 20 <br /> Ethylbenzene 186 0 50 " 200 ND 930 70-130 160 20 <br /> Xylenes(total) 560 0 50 600 ND 933 70-130 0 889 20 <br /> Surrogate aaa-Tnfluoroioluene 290 300 967 70-130 <br /> Sequoia Analytical -Walnut Creek The results rn this report apply to the samples analyzed in accordance with the chmn of <br /> • custody document Tins analytical report must be reproduced in its entirety <br /> Page 6 of 10 <br />