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Gettler-Ryan/Geostrategtes(1) Project Unocal(4) <br /> 6747 Sierra Court,Suite J Project Number 437 E Miner--C Sparage'Test (Reported <br /> Dublin CA,94568 Project Manager P LeCheminant 01/30/01 14 59 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical - San Carlos <br /> Reporting Spike Source %REC RPT] <br /> Analyte Result limit Umts Level Result %REC Limits RPD Uinit Notes <br /> Batch 1010093-EPA 5030B(PIT) <br /> Blank(1010093-BLK1) Prepared&Analyzed 01/28/01 <br /> Purgeable Hydrocarbons as Gasohne ND 500 ug/i <br /> Benzene ND 0 500 " <br /> Toluene ND 0 500 " <br /> Ethylbenzene ND 0 500 " <br /> Xylenes(total) ND 0 500 " <br /> Methyl tert-butyl ether ND 500 " <br /> Surrogate a a a-Trifluorotoluene 101 100 101 70-130 <br /> LCS(1010093-BSI) Prepared&Analyzed 01/28/01 <br /> Oylbi=, <br /> e 950 0 500 ug/1 I0 0 950 70-130 <br /> e 9 19 0 500 100 919 70-130 <br /> 9 83 0 500 too 98 3 70-130 <br /> Xylenes(total) 29 5 0 500 300 98 3 70-130 <br /> Surrogate a a a-Trifluorotoluene 102 100 102 70-130 <br /> LCS(1010093-BS2) Prepared&Analyzed 01/28/01 <br /> Purgeabte Hydrocarbons as Gasoline 236 500 ug/I 250 944 70-130 <br /> Surrogate a a a-Triuorotoluene 889 100 889 70-130 <br /> Matrix Spike(1010093-MSI) Source L101093-13 Prepared&Analyzed 0 t/28/01 <br /> Purgeable Hydrocarbons as Gasoline 247 500 ug/l 250 ND 988 60-140 <br /> Surrogate a s a-Trtfluorotoluene 9 04 11 100 904 70-130 <br /> Matrix Spike Du (1010093-MSD1) Source:L101093-13 Prepared&Analyzed 01/28/01 <br /> Purgeable Hydrocarbons as Gasoline 247 500 ug/1 250 ND 988 60440 0 25 <br /> Surrogate a a a-Triuorotoluene 957 100 95 7 70-130 <br /> ka- <br /> equola Analytical- San Carlos The results to this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 4 of 6 <br />