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` Seq u oia 1551 Road <br /> San Carlosrlos CA CA 94476 <br /> (650)232 9600 <br /> Analytical <br /> FAX wsegLl)2abscom32 ,1r <br /> 5aww sequoialabs coin <br /> Gett ler-Ry an/Geostrategies(1) - Project Unocal(4) s <br /> 6747 Sierra Court. Suite J Project Number former Unocal SS#12859 Stockton CA Reported <br /> Dublin CA 94568 Project Manager Deanna Harding 09/06/01 12 14 <br /> Total Purgeable Nydrocal bons (C6-C72), BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical - Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 111128004- EPA 5030B IPITI <br /> Blank (I H28004-BLKI) Prepared&Analyzed 08/28/01 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 <br /> Xvlenes(total) ND 050 " <br /> Methyi tert-butyl ether ND 25 " <br /> Surrogate a a a-Tri luorotoluene 870 100 870 70-130 <br /> LCS (IH28004-BSI) Prepared&Analyzed 08/28/01 T <br /> -Henzene - - 961 _ 050 ug/1 _ 100 961 70-130 <br /> 1 oluene 934 050 100 934 70-130 <br /> Ethylbenzene 9 53 050 too 95 3 70-130 <br /> Xylenes(total) 251 0 50 300 837 70-130 <br /> Surrogate a a a-Triuorotoluene 894 100 894 70-130 <br /> LCS(IH28004-BS2) Prepared& Analyzed 08/28/0) <br /> Purgeable Hydrocarbons 222 50 u8A 250 888 70-130 <br /> ---Surrogate a a,a_ j7yorotoluene 868 100 868 70-130 <br /> Matrix Spike(1H28004-1<1S1) Source L108120-02 Prepared& Analyzed 08/28/01 <br /> PurgeableHydrocarbons---- 236=-----50=-ug/1---250=—ND 944=60-140---- - — - = -_- ---- <br />--_Surrogate aao-Triuorotoluene„ _ M _ 121 ==100 =121 ,-70-130 <br /> Matrix Spike Dup(IH28004-MSD1) Source L108120-02 Prepared&Analyzed 08/28/01 <br /> Purgeable Hydrocarbons 236 50 ug/l 250 ND 944 60-140 000 25 <br /> Surrogate a a,a-Triuorotoluene 105 160 105 70-130 <br /> Sequoia Analytical - San Carlos The results in this report apply to the samples analyzed in accordance with the chain <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 18 of 22 <br />