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819 Sailer Ave Ste 8 <br /> Sequoia Sacramento,CA 95834 <br /> Analytical (916)421-4600 <br /> FAX(916)92 <br /> WWW sequoialabs Coin cam <br /> Gettler-Ryan-Rancho Cordova Project Former Unocal 0187,Stockton,CA S212554 <br /> 3140 Gold Camp Dr,Ste 170 ProjectNumber- NIA Reported <br /> Rancho Cordova CA,95670 Project Manager David Herzog 01/03/03 16 34 <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 Lunt Units Level Result %REC Lunits RPD Lurut Notes <br /> Batch 2120462-EPA 5030B(P/7) <br /> Blank(2120462-BLK4) _ Prepared&Analyzed12/30/02 <br /> Methyl tart-butyl ether ND 2 0 -ug/l <br /> ,,._..._.._ <br /> Surrogate a a a-Trifluorotoluene 101 100 102 60-140 <br /> Laboratory Control Sample 2120462-BSI) Prepared&Analyzed 12/28/02 <br /> Benzene 103 050 ug/l 10 0 103 70-130 <br /> Toluene 10 7 0 50 10 0 107 70-130 <br /> Ethylbenzene 105 0 50 10 0 105 70-130 <br /> Xylenes(total) 310 0 50 30 0 103 70-130 <br /> Methyl tent-butyl ether 995 20 10 0 100 70-130 <br /> Surrogate a a a-Tnfluorotoluene 11 4 100 114 60-140 <br /> Waboratory Control Sample(2120462-BS2) Prepared&Analyzed 12/2710 <br /> Benzene 848 050 ug/i too 85 70-130 <br /> Toluene 915 050 too 92 70-130 <br /> Ethylbenzene 9 26 0 50 100 93 70-130 <br /> Xylenes(total) 271 050 " 300 90 70-130 <br /> Methyl tert-butyl ether 106 2 0 100 106 70-130 <br /> Surrogate a a a-Trifluorotoluene 101 100 101 60-140 <br /> Laboratory Control Sample(2120462-BS3) Prepared&Analyzed_12/30/02 <br /> Benzene 967 050 ug/1 10 0 97 70-130 <br /> Toluene 10 2 050 too 102 70-130 <br /> Ethylbenzme 991 050 100 99 70-130 <br /> Xylenes(total) 297 050 300 99 70-130 <br /> Methyl tart-butyl ether 10 7 2 0 100 107 70-130 <br /> Surrogate a a a-Trifluorotoluene 114 100 114 60-140 <br /> Laboratory_Control Sample(2120462-BS4) T Prepared&Analyzed 12/31/02 <br /> Benzene 942 050 ug/l 100 94 70-130 <br /> Toluene 992 0 50 100 99 70-130 <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 in its entirety <br /> Page 7 of 9 <br />