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Sequoia 819 SenAve Ste 4 <br /> Sacramento to CA 9588 34 <br /> (916)921 9600 <br /> . Analytical FAX(916)921-0100 <br /> www sequoialabs corm <br /> Gettler-Ryan-Rancho Cordova Project Former Unocal 2859,Stockton,CA 5212549 <br /> 3140 Gold Camp Dr,Ste 170 Project Number N/A Reported <br /> Rancho Cordova CA,95670 Project Manager Geoffrey D Risse 01/03/03 16 17 <br /> Total Purgeable Hydrocarbon,BTEX and MTBE by DHS LUFT- Quality Control <br /> Sequoia Analytical-Sacramento <br /> Reporting Spike Source %REC RPD <br /> byte Result Ltmit Units Leve) Result %REC Lunits RPD Limit Notes <br /> Batch 2120461-EPA 5030E / <br /> Blank(2120461-BLK4) Prepared&Anal 12/30/02 <br /> Methyl tert-butyl ether ND 2 0 ug/l <br /> Surrogate a aa-Triuorotoluene Jos 100 105 60-140 <br /> Laboratory Control Sample 2120461-BSl Prepared&Anal ed 12/27/02 <br /> Benzene 848 050 ug/l too 85 70-130 <br /> Toluene 9 15 050 too 92 70-130 <br /> Ethylbenzene 926 050 100 <br /> 93 70-130 <br /> Xylenes(total) 271 050 300 <br /> 90 70-130 <br /> Methyl tort-butyl ether 106 2 0 100 106 70 130 <br /> Surrogate aa a-Tnfluorotoluene 101 100 101 60-140 <br /> Laboratory Control Sample(2120461-BS2) Prepared&Analyzed_12/28/02 <br /> Benzene 103 050 ug/l 100 103 70-130 - <br /> Toluene 10 7 050 100 <br /> 107 70-130 <br /> Ethytbenzene 105 050 100 105 70-130 <br /> Xylenes(total) 310 050 300 103 70-130 <br /> Methyl cert-bury]ether 995 20 100 100 70-130 <br /> Surrogate a a a-Trifluorotoluene 124 " 100 124 60-140 <br /> Laboratory Control Sample(2120461-BS3) --Prepared&Analyzed 12/29/02 <br /> Benzene too 050 ug/l 100 100 70-130 <br /> Toluene 106 050 " 100 106 70-130 <br /> Ethylbenzene 103 050 " too 103 70-130 <br /> Xylenes(total) 307 050 300 102 70-130 <br /> Methyl tert-butyl ether 986 20 100 99 70-130 <br /> Surrogate a a a-Trifluorotoluene 120 100 120 60-140 <br /> Laboratory Control Sample 2120461-BS4 aced&Analyzed 12/30/02 <br /> Benzene 967 050 ug/l too 97 70-130 <br /> Toluene 102 050 " 100 102 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 bases <br /> 0 Ms analytical report must be reproduced in its entirety <br /> Page 5 of 7 <br />