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Sequoia 1551 tnal Roa <br /> San CarlosflOs CA 9407407 <br /> 4i) <br /> 0 <br /> (654)232 960 <br /> mW Analytical FAX(650)232-9612 <br /> www sequoialabs co <br /> Gettler-Ryan/Geostrategies(1) - ' Project Unocal(4) <br /> 6747 Sierra Court,Suite J Project Number Former Unocal#5098&Montgmery Ward Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 03/26/02 12 44 <br /> J Total Purgeable Hydrocarbons by DHS LUFT - Quality Control <br /> Sequoia Analytical - San Carlos <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2030038-EPA 5030B (PIT) --- <br /> Matrix Spike(2030038-MSI) Source L203008-03 Prepared&Analyzed 03/15/02 - <br /> Surrogate a a,a-Trrfluorotoluene 956 ug/1 100 956 60-190 <br /> Matrix Spike Dup(2030038-MSDI) Source L203008-03 Prepared&Analyzed 03/15/02 <br /> Surrogate a a a-Tris luorotoluene 986 ugR 100 986 60-140 <br /> Batch 2030039 -EPA 5030B(PIT <br /> Blank(2030039-BLK1) Prepared&Analyzed 03/16/02 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/l <br /> Surrogate a a a-Trifluorotoluene 881 100 881 60-140 <br /> LCS(2030039-BS1) Prepared&Analyzed 03/16/02 <br /> Surrogate a a a-Trifluorotoluene 897 ug/l 100 89 7 60-140 <br /> LCS(2030039-BS2) Prepared&Analyzed 03/16/02 <br /> z <br /> Purgeable Hydrocarbons as Gasoline 240 50 ug/l 250 960 70-130 <br /> Surrogate a a a-Trrfluorotoluene 965 11 100 965 60-140 <br /> Matrix Spike(2030039-MSI) Source L203015-07 Prepared&Analyzed 03/16/_02 -� <br /> Purgeable Hydrocarbons as Gasoline 225 50 -ug/I 250 ND 900 -60-140 <br /> Surrogate a a a-Tr iuorotoluene ­78 100 78 660-140 - --— <br /> Matrix Spike Du (2030039-MSDI) Source L203015-07 Prepared& Analyzed 03/16/02 <br /> Purgeable Hydrocarbons as Gasoline 217 50 ug/l 250 ND 86 8 60-140 3 62 25 <br /> Surrogate a a a-Trifluoroioluene-- - -- -8 08- — -- = - ---10 0 ---- ----80 8=—60=140---- - - - - - - - <br /> r <br /> Sequoia Analytical - San Carlos The results in this report apply to the samples analyzed in actor dance with the chain o <br /> custody document This analytical report must be r eproduced in its entirety ' <br /> Page 79 of 91 <br />