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819 Striker Avenue Suite 8 <br /> 5acrairi <br /> ento CA 95834 <br /> Sequoia (916)921-9600 <br /> FAX(916)921-0 100 <br /> Analytical www seqitO1alabs COM <br /> Gettler-Rvan-Rancho Cordova Project Unocal 2859 Stockton CA <br /> 3140 Gold Camp Dr Ste 170 Project Number NIA Reported <br /> Rancho Cordova CA,95670 Project Manager David Herzog 06/12/01 17 26 <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 /> Analvte Result Limit Chits Level Resuit °.REC Limns RPD Limit Notes <br /> Batch I E31017- EPA 5030E McOH <br /> Blank(IE31017-BLK1) Prepared&Analyzed 05/31/01 <br /> Purgeable Hvdrocarbons ND 10 mg/kg <br /> Benzene 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-Tnfluaro[ohiene 0 660 0 600 110 40-140 <br /> LCS(1 E31017-BS1) Prepared& Analyzed 05/31/01 <br /> Benzene 0 728 00050 mg/kg 0 800 910 50-150 <br /> oluene 0 762 00050 0 800 952 50-150 <br /> Ethylbenzene 0 806 00050 0 800 101 50-150 <br /> Xylenes(total) 238 00050 240 992 50-150 <br /> Surrogate aaa-Trifluorotoluene 0 660 0 600 110 40-140 <br /> Matrix Spike(IE31017-NISI) _ Source W105576-01 Prepared& Analyzed 06/01/01 <br /> Benzene 0 822 00050 ml/kg 0 800 ND 103 :)0-150 <br /> Toluene 0 868 00050 0 800 ND 108 50-150 <br /> Ethylbenzene <br /> 0 916 00050 0 800 ND 114 �0-150 <br /> Xylenes(total) 2 72 00050 240 ND 113 50-150 <br /> Surrogate a a a-Trifluorotoluene 0 614 0 600 102 40-140 <br /> Matrix Spike Dup(1E31017-MSDI) Source W105576-01 Prepared&Analyzed 06/01/01 <br /> Benzene 0 818 00050 mg/kg 0 800 ND 102 50-150 0 488 20 <br /> Toluene 0 870 00050 0 800 ND 109 50-150 0 230 20 <br /> Ethylbenzene 0 918 00050 0 800 ND 115 :10-150 0 218 20 <br /> Xylenes(total) 275 00050 240 ND 115 50-150 1 10 20 <br /> Surrogate aaa-Trifluorototuene 0 606 0 600 101 40-140 <br /> Sequoia Analytical- Sacramento <br /> The results to this report apply to the samples analyzed to accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 4 of 5 <br />