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819 Striker Avenue,Suite 8 <br /> (Dnto, 95834 <br /> Sacramento,(916))9 921-9640 <br /> Anal tical www sequoialabs com <br /> ler-Ryan-Rancho Cordova Project Former Unocal 2859,Stockton,CA <br /> 3140 Gold Camp Dr,Ste 170 Project Number N/A Reported <br /> Rancho Cordova CA,95670 Project Manager David Herzog 03/21/02 16 16 <br /> Total Purgeable Hydrocarbon, BTEX and MTBE by DHS LUFT- Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPO <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2030244-EPA 5030B McOH <br /> Blank(2030244-BLK1) Prepared&Analyzed 03/18/02 <br /> Purgeable Hydrocarbons ND 5 0 mg/kg <br /> Benzene ND 0 050 " <br /> Toluene ND 0 050 " <br /> Ethylbenzene ND 0 050 " <br /> Xylenes(total) ND 0 050 " <br /> Methyl tert-butyl ether ND 0 25 " <br /> Surrogate a,a,a-Trrfluoiotoluene 0 948 1 00 94 8 60-140 <br /> LCS(2030244-BS 1) Prepared&Analyzed 03/18/02 <br /> Benzene l Ol 0 050 mg/kg 1 00 101 70-130 <br /> Toluene 0 936 0 050 1 00 93 6 70-130 <br /> Ethylbenzene 0 985 0 050 1 00 98 5 70-130 <br /> nes(total) 2 82 0 050 3 00 94 0 70-130 <br /> hyl tert-butyl ether 0 989 0 25 1 00 98 9 70-130 <br /> Surrogate a a a-Trifluorotoluene 0 903 1 00 903 60-140 <br /> LCS Du (2030244-BSD1) Prepared&Analyzed 03/18/02 <br /> Benzene 1 07 0 050 mg/kg 1 00 107 70-130 5 77 25 <br /> Toluene 1 00 0 050 1 00 100 70-130 6 61 25 <br /> Ethylbenzene l 05 0 050 l 00 105 70-130 639 25 <br /> Xylenes(total) 3 01 0 050 3 00 100 70-130 6 52 25 <br /> Methyl tert-butyl ether 0 962 0 25 1 00 96 2 70-130 2 77 25 <br /> Surrogate a a a-Trifluorotoluene 0 980 1 00 980 60-140 <br /> quoia Analytical -Sacramento The results in this report apply to the samples analyzed to accordance with the chain <br /> of custody docunient This analytical report must be reproduced in its entirety <br /> Page Page 4 of 6 <br />