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• <br /> Gettler-Ryan/Geostrategies(1) Project Unocal(4) <br /> 6747 Sierra Court,Suite 3 ProjectNumber Former Unocal SS#0187 Repo <br /> rted <br /> Dublin CA,94568 Project Manager Deanna Harding 05/30/01 13 32 <br /> Total Purgeable Hydrocarbons (C6-02),BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical - San Carlos <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units level Result %REC Lm uts RPD limit Notes <br /> Batch 1050120-EPA 5030B(P <br /> Blank(1050120-BLK1) Prepared&Analyzed 05/29/01 <br /> Purgeable Hydrocarbons as Gasoline ND Soo u9/1 <br /> Benzene ND 0 500 " <br /> Toluene ND 0 500 " <br /> Ethylbenzene ND 0 500 " <br /> Xylenes(total) ND 0 500 " <br /> Methyl tett-butyl ether ND 500 " <br /> Surrogate a a a-Trifluorotoluene 940 100 940 70-130 <br /> LCS(1050120-BSI) Prepared&Analyzed 05/29/01 <br /> Bene 776 0 500 ugfl 100 776 70-130 <br /> Toluene 777 0 500 100 777 70-130 <br /> —'t' <br /> ene 7 66 0 500 too 766 70-130 <br /> es(total) 233 0 500 300 77 7 70-130 <br /> Surrogate a a a-Trifluorotoluene 944 100 944 70-130 <br /> LCS(1050120-BS2) Prepared&Analyzed 05/29/01 <br /> Purgeable Hydrocarbons as Gasoline 261 500 ug/l 250 104 70-130 <br /> Surrogate a a,a-Trifluorotoluene 937 " 100 93 7 70-130 <br /> Matrix Spike(1050120-MSI) Source L105132-06 Prepared&Analyzed 05/29/01 <br /> Bene 108 0 500 ug/l too ND 108 60-140 <br /> Toluene 107 0 500 100 ND 107 60-140 <br /> Ethylbenzene 107 0 500 too ND 107 60-140 <br /> Xylenes(total) 323 0 500 300 ND 108 60-140 <br /> Surrogate a aa-Trifluorotoluene 917 100 917 70-130 <br /> Matrix Spike Dup(1050120-MSD1) Source L105132-06 Prepared 05/29/01 Analyzed 05/30/01 <br /> BenzeAe 842 0 500 ug/l 100 ND 84 2 60-140 24 8 25 <br /> Toluene 838 0 500 100 ND 83 8 60-140 24 3 25 <br /> Ethylbenzene 832 0 500 100 ND 83 2 60-140 250 25 <br /> Xylenes(total) 254 0 500 300 ND 84 7 60-140 23 9 25 <br /> Surrogate a aa-Triuorotoluene 919 100 919 70-130 <br /> Amok <br /> Uola Analytical- San Carlos 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 26 of 33 <br />