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819 Striker Avenue Suite 8 <br /> Sequoia Sauamento CA 95834 <br /> lx� (916)921-9600 <br /> Analytical FAX equo alabs921 c 00 <br /> www sequoialabs com <br /> Gettler-RNan-Rancho Cordova Project 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 06/13/01 13 30 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical - Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result O'REc Limas RAD Lima Notes <br /> Batch 1 F06002- EPA 5030B McOH <br /> Blank(IF06002-BLK1) Prepared&Analyzed 06/05/01 <br /> Purgeabie Hvdrocarbons ND 10 mg/kg <br /> Benzene ND 00050 " <br /> Toluene ND 00050 <br /> Ethylbenzene ND 00050 <br /> Xylenes(total) ND 00050 <br /> Methvl tent butyl ether ND 0 050 <br /> Surrogate a a a-Triuorotoluene 0 770 0 600 128 40-140 <br /> Blank(I F06002-BLK2) Prepared&Analyzed 06/06/01 <br /> turgeable Hydrocarbons ND 1 0 mg/kg <br /> enzene ND 00050 <br /> Toluene ND 00050 <br /> Ethylbenzene ND 00050 <br /> Xylenes(total) ND 00050 <br /> Methyl tert-butyl ether ND 0 050 " <br /> Surrogate a a a Trefluorotoluene 0 728 0 600 121 40-140 <br /> LCS(IF06002-BS1) Prepared&Analyzed 06/05/01 <br /> Benzene 0 838 00050 mg/kg 0 800 105 50-150 <br /> Toluene 0 876 00050 0 800 110 50-150 <br /> Ethylbenzene 0 910 00050 0 800 114 50-150 <br /> Xylenes(total) 2 71 00050 240 113 50-150 <br /> Surrogate a a a-Trefluorotoluene 0 788 0 600 131 40-140 <br /> LCS(IF06002-BS2) Prepared 06/06/01 Analyzed 06/07/01 <br /> Benzene 0 730 00050 mg/kg 0 800 91 2 50-150 <br /> Toluene 0 768 00050 0 800 960 50-150 <br /> Ethylbenzene 0 808 00050 0 800 101 50-150 <br /> Xylenes(total) 241 00050 240 100 50-150 <br /> Surrogate a a a-Trivarotoluene 0 668 0 600 111 40-140 <br /> 0 <br /> Sequoia 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 en its entirety <br /> Page 4 of 7 _ <br />