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(`�p Sig Sinker Ave Ste 8 <br /> Seuoia Sacramento 95834 <br /> q (91b)9292 1-9600 <br /> FAX(916)921-0100m <br /> � Analytical www seyuotalabacom <br /> Gettler-Ryan-Rancho Cordova Project Former Unocal 2859,Stockton,CA S211680 <br /> 3140 Gold Camp Dr,Ste 170 Project Number NIA Reported <br /> Rancho Cordova CA,95670 Project Manager Geoffrey D Rtsse 12/13/02 20 12 <br /> Total Purgeable Hydrocarbon,BTEX and MTBE by DHS LUFT- Quality Control <br /> Sequoia Analytical-Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Ltmtt Units Level Result %REC Lmnts RPD Lumtt Notes <br /> Batch 2120095-EPA 5030B(PIT) <br /> Laboratory Control Sample 2120095-BSI) Prepared&Analyzed 11/27/02 <br /> Surrogate a a a-Trtfluorotoluene 968 ug/1 100 97 60-140 <br /> Laboratory Control Sample(2120095-BS3) Prepared&Analyzed 12/03/02 <br /> Benzene 835 050 UFA 100 84 70-130 <br /> Toluene 737 050 too 74 70-130 <br /> Ethylbenzene 825 050 too 82 70-130 <br /> Xylenes(total) 253 050 300 84 70-130 <br /> Methyl tert-butyl ether 639 25 100 64 70-130 Q-LIM <br /> Surrogate aaa-Trnfluorotoluene 866 100 87 60-140 <br /> iLaboratory Control Sample(2120095-BS4) Prepared&Analyzed 12/13/02 <br /> Benzene 863 050 ug/l 100 86 70-130 <br /> Toluene 847 050 " 100 85 70-130 <br /> Ethylbenzene 784 050 too 78 70-130 <br /> Xylenes(total) 26 2 050 30 0 87 70-130 <br /> Methyl tert-butyl ether 9 IS 2 5 10 0 92 70-130 <br /> Surrogate a,a a-TrifTuorotoluene 967 100 97 60-140 <br /> Laboratory Control Sample Du (2120095-BSD1) Prepared&Analyzed 11/27/02 <br /> Benzene 956 050 ug/l 100 96 70-130 0 3 25 <br /> Toluene 8 95 050 " 100 90 70-130 11 25 <br /> Ethylbenzene 867 050 100 87 70-130 9 25 <br /> Xylenes(total) 265 050 300 88 70-130 9 25 <br /> Methyl tert-butyl ether 744 25 100 74 70-130 16 25 <br /> Surrogate a a a-Tri luoratoluene 105 100 105 60-140 <br /> Duplicate(2120095-DUPI) Source.S211511-08 Prepared&Analyzed 11/27/02 <br /> Benzene ND 050 ug/l ND 50 <br /> Toluene ND 050 ND 50 <br /> Ethylbenzene ND 050 ND 50 <br /> Xylenes(total) ND 050 ND 50 <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> . custody document Unless otherwise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced to its entirety <br /> Page 6 of 8 <br />