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819 Slrikar A%,nue Sun,8 <br /> Sequoia St,mniento CA 95834 <br /> + (9 16)921 9600 <br /> Analytical uIAX(16)quol 92fl-ibs u00 <br /> URS-Sac Gatmav Oaks Project ARCO 434,Lodi,CA <br /> 2870 Gateway Oaks Dr,Ste, 300 Project Number 434,Lodi,CA Reportrd <br /> Sacramento CA,95833 Pro}Lct Manager Vernon Elarth 07/08/02 16 02 <br /> Total Purgeable Hydrocarbons and BTEX by DHS LUFF-Quality Control <br /> Sequoia Analytical-Sacramento <br /> Reponut& Spike Source %Rl C RPD <br /> Analyte Rcsult Limit Units Level Result %REC LnnitS RPD Lund Notes <br /> Batch 2070028-EPA 5030B(PIT) <br /> Blank(2070028-BLKI) Prepared&Analyzed 06/28/02 <br /> Purgeable llydrocarboils ND 50 u9A ^ <br /> Benzene ND 0 50 <br /> Toluene ND 0 50 <br /> Ethylbenzenc ND 050 " <br /> Xylenes(total) ND 0 50 " <br /> Surrogate a a a-Trifluorotoluene 100 10 0 100 60-140 <br /> LCS(2070028-BSI) Prepared&Analyzed 06/28/02 <br /> Benzene 9 58 0 50 ugJl 10 0 96 70-130 <br /> Toluene 10 l 0 50 10 0 101 70-130 <br /> EthylbLnzene 10 0 0 50 10 0 100 70-130 <br /> ylenes(Wtal) 30 5 0 50 30 0 102 70-130 <br /> errogate a a a-Trifluorotolucite 10 7 100 107 60-140 <br /> Matrix Spike(2070028-MSI) Source S206335-02 Prepared&Analyzed 06/28/02 <br /> Benzene 9 30 0 50 ugA 10 0 ND 88 60-140 <br /> Toluene 997 0 50 10 0 ND loo 60-140 <br /> Ethylbca17ene 9 81 0 50 100 ND 98 60-140 <br /> X}lenes(total) 30 1 0 50 30 0 ND loo 60-140 <br /> Surrogate a a a-Tri luorotoluene 106 10 0 106 60-140 <br /> Matrix Spike Dup(2070028-MSD1) Source 5206335-02 Prepared& Analyzed 06/28/02 <br /> Benzt,tte 9 84 0 50 ugA 10 0 ND 94 60-140 6 25 <br /> Toluene 10 3 0 50 to 0 ND 103 60-140 3 25 <br /> Ythylbenzene 10 3 0 50 l0 0 ND 103 60-140 5 25 <br /> Xylenes(total) 31 5 0 50 300 ND 105 60-140 5 25 <br /> Surrogate a a a-Trifluorotoluene 10 3 10 0 103 60-140 <br /> quota Analytical-Sacramento The results ut rhes report apply to the samples analtzed in accotdancc xilh the chain <br /> 7 of rustody document This analytical rc port must he reproduced in its enorcty <br /> Page Page.7 of 10 <br /> I <br />