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1551 Industrial Road <br /> Sequoia Sen Carlos CA94070 <br /> 23 <br /> (650)23z-960-96oa <br /> A n a lyti ca 1 FAX(650)232-9612 <br /> www sequoialabs coin <br /> ler-Ryan/Geostrategies(1) Project Unoca](4) <br /> b747 Sierra Court, Suite] Project Number Unocal SS#5098 Stockton CA Reported <br /> Dublin CA 94568 Project Manager Deanna Harding 01/01/02 11 05 <br /> Total Purgeable Hydrocarbons by DHS LUFT - Quality Control <br /> Sequoia Analytical - San Carlos <br /> Reporting Spike Source %REC RPD <br /> lAnalvie Result Limn Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1120049-EPA 5030B(PIT) <br /> Blank (1I20049-BLK1) Prepared&Analyzed 12/12/01 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/I <br /> Surrogate a o,a-Trifluororoluene 845 100 843 60-140 <br /> LCS(1120049-BS2) Prepared&Analyzed 12/12/01 <br /> Purgeable Hydrocarbons as Gasoline 270 50 uSA 250 108 70-130 <br /> Surrogate a a a-Tr fluorotoluene 9 45 " 100 945 60-140 <br /> Matrix Spite(1120049-MSI) Source LI12030-07 Prepared&Analvzed 12/12/01 <br /> Purgeable Hvdrocarbons as Gasoline 253 50 ugll 250 ND 101 60-140 <br /> Surrogate a a a-Trifluorotoluene 96.5 " 100 96 5 60-140 <br /> Matrix Spike Du (1120049-]vlSDI) Source L112030-07 Prepared&Analyzed 12/12/01 <br /> Purgeable Hydrocarbons as Gasoline 253 50 ug/I 250 ND 103 60-140 000 25 <br /> Bare a a a-Tryuorotoluene 100 100 100 60-140 <br /> Batch 1]20050-EPA 5030B (PIT) <br /> Blank(1120050-BLKI) Prepared&Analyzed 12/12/01 <br /> Purgeable Hydrocarbons as Gasoline ND 50 u@A <br /> Surrogate a a a-Trtlluorotoluene 887 100 88 7 60-140 <br /> LCS(1120050-BS2) Prepared&Analyzed 12/12/01 <br /> Purgeable Hydrocarbons as Gasoline 236 50 ugA 250 944 70-130 <br /> Surrogate ax a-Triuoroioluene 902 100 902 60-140 <br /> Matrix Spike(1120050-MSI) Source LI 12030-15 Prepared&Analyzed 12/12/01 <br /> Purgeable Hydrocarbons as Gasoline 205 50 ug/I 250 ND 82 0 60-140 <br /> Surrogate a,a o-Triuorotoluene 864 100 864 60-140 <br /> uoia Analytical -San Carlos The results in this report apply to the samples analyed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 27 of 34 <br />