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4 ' Sequoia 819 Stoker Avenue,Suite S <br /> Sacramento,CA 95834 <br /> 100 <br /> (916)921-9600 <br /> Analytical FAX equo gabs com <br /> www sequolalabs corn <br /> Gettler-Ryan-Rancho Cordova Project Former Unocal 0187,Stockton,CA S210535 <br /> 3140 Gold Camp Dr,Ste 170 Project Number N/A Reported <br /> Rancho Cordova CA,95670 Project Manager Geoffrey D Risse 1//12/02 16 29 <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 limit Units level Result %REC Limits RPD Limit Notes <br /> Batch 2110108-EPA 5030B(P/T) _ <br /> Matrix Spike(2110108-MSI) Source S210664-03 Prepared&Analyzed 11/01/02 <br /> Benzene 101 050 ugn 100 ND 101 60-140 <br /> Toluene 104 10 too ND 99 60-140 <br /> Ethylbenzene 993 050 100 ND 99 60-140 <br /> Xylenes(total) 300 050 300 ND 100 60-140 <br /> Methyl tert-butyl ether 149 25 100 47 102 60-140 <br /> Surrogate a a a-Triuorotoluene 926 100 9.3 60-140 <br /> Matrix Spike Dup(2110108-MSDI) Source S210664-03 Prepared&Analyzed 11/01/02 <br /> Benzene 102 050 USA 100 ND 102 60-140 1 25 <br /> Toluene 102 10 100 ND 97 60-140 2 25 <br /> Ethylbenzene 100 050 100 ND 100 60-140 07 25 <br /> Wyes(total) 305 050 300 ND 102 60-140 2 25 <br /> l tert-butyl ether 152 25 100 47 105 60440 2 25 -� <br /> Surrogate a a a-Trifluorotoluene 906 100 91 60-140 <br /> uola Analytical- Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 10 of 11 <br />