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sequoia 1551 Carlos <br /> al Road <br /> + ] San Carlos CA 94070 <br /> nal <br /> J7/ C a l (650)232-9600 <br /> FAX(650)232 9612� <br /> www sequoialabs eom <br /> Gettler-Ryan/Geostrategies(1) Project Unocal(4) <br /> 6747 Sierra Court Suite J Project Number Former Unocal SSI12859 Stockton,CA Reported <br /> Dublin CA 94568 Project Manager Deanna Harding 09/06/01 1214 <br /> :1 <br /> Total Purocable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical - ]\7o1 gan H111 <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limn Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1H29003- EPA 5030B IP/T] <br /> Blank (IH29003-1311LKI) Prepared&Analyzed 08/29/01 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl ten-butyl ether ND 2 5 " <br /> Surrogate a o o-Triuorotoluene 108 10 0 108 70-130 <br /> LCS (1H29003-BSI) Prepared&Analyzed 08/29/01 <br /> Benzene - 101 4 0 50 u8/1 )0 0 101 70-130 <br /> Toluene 109 050 100 109 70-130 <br /> Ethylbenzene 113 1050 <br /> 0 50 10 0 113 70-130 <br /> Xylenes(total) 334 - 300 -111 70-130 _ <br /> Surrogate a a a-Tri luorotoluene 110 100 110 70-130 <br /> I (`S(11-129003-13S2) _ Prepared&Analyzed 08/29/01 <br /> ,,r_teble Hvdrocarbons 251 50 ug/1 250 100 70-130 <br /> Surrogate a,a a-Triuorololuene 120 11100 12.0-70-13& <br /> - 70_-130 _ _- <br /> MatrixSpike (IH29003-NISI) Source 1-108120-17 Prepared&Analyzed 08/29/01 <br /> Benzene— —-- ------- —�- -l0 3----0 50- —up---10 0--ND----103--60-140 --�— --- — -— <br /> Toluene _ _ _ 11 1 _ 050 _ _10_0__ ND 111 _ 60-140_ _ <br /> Ethylbenzene 1 1 4 0 50 100 ND 114 60-140 <br /> Xylenes(total) 339 0 50 300 ND 113 60-140 <br /> Surrogate a a a-Trifluorwoluene 11 1 10 0 111 70-130 <br /> Matrix Spike Dup (IH29003-NISDI) Source 1-108120-17 Prepared&Analyzed 08/29/01 <br /> Benzene 104 050 ug/I 100 ND 104 60-140 0 966 25 <br /> Toluene 1 1 0 050 10 0 ND 110 60-140 0 905 25 <br /> Ethylbenzene 1 1 3 050 10 0 ND 113 60-140 0 881 25 <br /> Xylenes(total) 33 9 050 30 0 ND 113 60-140 000 25 <br /> Surrogate a a,a-Triuorololuene 110 10 0 110 70-130 <br /> Sequoia Analytical - San Carlos The results in this report apply to the samples analyzed in accordance with the chain o <br /> custody document This analytical report must he reproduced in its entirety <br /> Page 20 of 22 <br />