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404 N Wiget Lane <br /> Sequoia Walnut Creek C94598 <br /> (925) 988 8-9600 <br /> FAX (925) 988-9673 <br /> Analytical www sequoialabs com <br /> Gettler Ryan,Inc -Rancho Cordova Project Unacdl <br /> 3164 Gold Camp Drive #240 Project Number Unocal#0187 Reported <br /> RdnLho Cordova CA 95670 Pro}eLt Manager David Herzog 16-Nov-00 07 22 <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 /> Andlvte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch OK13002-EPA 5030B [MeOH] <br /> Blank(OK13002-BLK1) Prepared&Analyzed 13-Nov-00 <br /> Purgeable Hydrocarbons ND 1 0 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 aaa-Trifluorotoluene 0 770 _ 0 600 128 40-140 <br /> LCS(OK13002-BSI) - Prepared&Analyzed 13-Nov-00 <br /> Benzene 0 742 00050 mg/kg 0 800 927 50-150 <br /> Toluene 0 754 00050-- 0 800 942 50-150 <br /> Ethylbenzene 0 786 0 0050 0 800 983 50-150 <br /> 0—ea(total) 2 33 00050 2 40 971 50-150 <br /> Surrogate a a a-Tnfluorotoluene 0 688 0 600 115 40-140 <br /> Matrix Spike(OK13002-MSI) Source WOIIO89-14 Prepared&Analyzed 13-Nov-00 <br /> Benzene 0 776 00050 mg/kg 0 800 ND 970 50-150 <br /> Toluene 0 800 00050 0 800 ND 100 50-150 <br /> Ethylbenzene 0 834 00050 0 800 ND 104 50-150 <br /> Xylenes(total) 2 50 00050 2 40 ND 104 50-150 <br /> Surrogate a a a-Trifluorotoluene 0 526 0 600 877 40-140 <br /> Matrix Spike Dup (OK13002-MSDI) Source WO11089-14 Prepared&Analyzed 13-Nov-00 <br /> Benzene 0 792 00050 mg/kg 0 800 ND 990 50-150 204 20 <br /> Toluene 0 828 00050 0 800 ND 103 50-150 3 44 20 <br /> Ethylbenzene 0 866 00050 0 800 ND 108 50-150 376 20 <br /> Xylenes(total) 259 00050 240 ND 108 50-150 3 54 20 <br /> Surrogate a a a Trifluorololuene 0 522 0 600 870 40-140 <br /> uola Analytical- Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Thir analytical report must be reproduced in its entirety <br /> Page 8 of 9 <br />