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Gettler-Ryan/Geostrategtes(1) Project Unocal(4) <br /> 6747 Sierra Court, Suite 3 Project Number 437 E Miner--C Sparage Test Reported <br /> Dublin CA,94568 Project Manager P LeChetninant 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 RPB <br /> Analyte Result Limit units Level Result %REC limns RPD Lnut Notes <br /> Batch 1010096-EPA 5030B (PIT) <br /> Blank(1010096-BLKI) Prepared&Analyzed 01/29/01 <br /> Purgeable Hydrocarbons as Gasoline ND Soo ug/l <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-Trtfluorotoluene 12 1 100 111 70-130 <br /> LCS(1010096-BS2) Prepared&Analyzed 01/29/01 <br /> Purgeable Hydrocarbons as Gasoline 274 500 ug/i 250 110 70-130 <br /> agate a a,a-Trifluorotoluene 116 100 116 70-130 <br /> LCS(1010096-BS3) Prepared&Analyzed 01/29/01 <br /> Benzene 114 0 500 ug/1 100 114 70-130 <br /> Toluene 112 0 500 100 112 70-130 <br /> Ethylbenzene 116 0 500 " 100 116 70-130 <br /> Xylenes(total) 345 0 500 300 115 70-130 <br /> Surrogate a a a-Trtfluorotoluene 12 7 100 117 70-130 <br /> Matrix Spike(1010096-MSI) Source L101104-03 Prepared&Analyzed 01/29/01 <br /> Benzene I 1 2 0 500 ug/1 100 ND 112 60-140 <br /> Toluene 1 1 2 0 500 Wo ND 112 60-140 <br /> Ethylbenzene 114 0 500 100 ND 114 60-140 <br /> Xylenes(total) 341 0 500 300 ND 114 60-140 <br /> Surrogate a a a-Trifluorotoluene 102 100 101 70-130 <br /> Matrix Spike Du (1010096-MSD1) Source LIOII04-03 Prepared&Analyzed 01/29/01 <br /> Benzene 9 18 0 500 U94 100 ND 91 8 60-140 198 25 <br /> Toluene 9 13 0 500 " 100 ND 913 60-140 204 25 <br /> Ethylbenzene 9 23 0 500 100 ND 923 60-140 210 25 <br /> Xylenes(total) 277 0 500 300 ND 923 60-140 207 25 <br /> Surrogate a s a-Trtfluorotoluene 938 100 93 8 70-130 <br /> 4e—cqi—uoia.Analytical-San Carlos 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 in its entirety <br /> Page 5 of 6 <br />