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Q 819 Striker Ave Su 8 <br /> Sequoia Saerairi(91 9295834 <br /> %00 <br /> q (916)921_9b00 <br /> FAX(916)921-0100 <br /> • Analytical wwwuq,oWabs <br /> Gettler-Ryan-Rancho Cordova Project Former Unocal 0187,Stockton,CA S211681 <br /> 3140 Gold Camp Dr,Ste 170 Project Number N/A Reported <br /> Rancho Cordova CA,95670 Project Manager Geoffrey D Rise 12/13/02 20 19 <br /> Total Purgeable Hydrocarbon,BTEX and MTBE by DHS LUFT- Quality Control <br /> Sequoia Analytical-Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Rcsult Lanit Units Level Result %RFC Luruts RPD Lumt Notes <br /> Batch 2120085-EPA 5030B(PIT} <br /> Laboratory Control Sample(2120085-BS1) EMared&Analyzed 12/04/02 <br /> Surrogate a a a-Trifluormoluene 105 ugR 100 105 60-140 <br /> Laboratory Control Sample 2120085-BS2 aced&Analyzed 12/05/02 <br /> Benzene 103 050 ugll 100 103 70-130 <br /> Toluene 967 050 100 97 70-130 <br /> Ethylbenzene 983 050 100 98 70-130 <br /> Xylenes(total) 305 050 300 102 70-130 <br /> Methyl tert-butyl ether 600 25 100 60 70-130 Q-LMI <br /> Surrogate a a a-Trtfluorotoluene 11 1 100 111 60-140 <br /> Laboratory Control Sample(2120085-BS3) Prepared&Analyzed 12/05/02 <br /> Benzene 901 050 ug/I 100 90 70-130 <br /> Toluene 943 050 100 94 70-130 <br /> Ethylbenzonc 927 050 100 93 70-130 <br /> Xylenes(total) 278 050 300 93 70-130 <br /> Methyl tert-butyl ether 109 2 5 100 109 70-130 <br /> Surrogate a a a-Trifluorotoluene 119 106 119 60-140 <br /> Matrix Spike(2120085-MSI) Source 5211708-03 Prepared&Analyzed 12/05/02 <br /> Benzene 103 050 ug/1 100 ND 103 60-140 <br /> Toluene 9 65 050 100 ND 96 60-140 <br /> Ethylbenzene 937 050 100 ND 94 60-140 <br /> Xylenes(total) 292 050 300 ND 97 60-140 <br /> Methyl tert-butyl ether 9 87 2 5 " 10 0 ND 99 60-140 <br /> Surrogate a,a,a-Tris luorotoluene 109 100 109 60-140 <br /> Matrix Spike Da (2120085-MSDI) Source S211708-03 Prepared&Analyzed 12/05/02 <br /> Benzene 107 050 ug/l 100 ND 107 60-140 4 25 <br /> Toluene 965 050 100 ND 96 60-140 0 25 <br /> Ethylbenzene 103 050 10 0 ND 103 60-140 9 25 <br /> Xylenes(torsi) 322 050 300 ND 107 60-140 10 25 <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 7 of 9 <br />