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Sequoia 1455 McDowell Blvd North Ste D <br /> a_ _� <br /> Petaluma CA 94954 <br /> Analytical (707)792-0345 <br /> FAX(707)792-0342 <br /> www sequoiaiabs com <br /> Gettler-Ryan/Geostrategies(l) Project ,Unocal(4) <br /> 6747 Sierra Court, Suite j Project Number Former Unocal#0187,Stockton Reported <br /> Dublin CA,94568 Project Manager iDeanna Harding 05/24/02 16 38 <br /> Total Purgeable Hydrocarbon (C6-Cl2) by EPA 8015M and BTEX/MTBE by EPA 8021B - Quality Control <br /> Sequoia Analytical - San Carlos <br /> Reporting- Spike Source %REC RPD ' <br /> Analyte Result Lunn Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2050042 -EPA 5030B(PIT) <br /> Matrix Spike Dup(2050042-MSDI) Source L205041-0I Prepared&Analyzed 05/20/02 s _ - <br /> Purgeable Hydrocarbons as Gasoline 257 50 ug/l 250 ND 103 60-140 3 16 25 <br /> Surrogate a,a,a-Trifluorotoluene 106 100 106 70-130 <br /> Batch 2050047 -EPA 5030B(P/T) - <br /> Blank(2050047-BLKI) Prepared&Analyzed 05/21/02 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/l <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether - - ND so a - <br /> Surrogate a a a-Trtfluorotoluene 922 100 922 70-130 <br /> LCS(2050047-13SI) Prepared&Analyzed 05/21/02 <br /> Benzene_ 9 22 0 50—ug/l 10 0 —92 2--70-130 — —_— — <br /> Toluene 881 050 100 881 70-130 <br />=Ethylbenzene-- ---- --809-- --050 ---100 ---80970-130-------- -- --- - -- <br /> Xylenes(total) 242 050 300 807 70-130 <br /> Surrogate a a a-Triuorotaluene 101 100 101 70-130 <br /> LCS(2050047-BS2) Prepared&Analyzed 05/21/02 <br /> Purgeable Hydrocarbons as Gasoline 243 50 ug/l 250 972 70-130 <br /> Surrogate-a,a a=Triuororoluene - 982 " <br /> 100 98 2 70--130 <br /> Matrix Spike(2050047-MSI) Source L205032-05 Prepared&Analyzed 05/21/02 <br /> Benzene 9 68 0 50 ug/l 100 ND 968 60-140 <br /> Toluene 924 0 50 10 0 ND 924 60-140 <br /> Ethylbenzene 8 70 050 100 ND 870 60-140 <br /> Xylenes(total) 257 050 300 ND 85 7 60-140 <br /> Sequoia Analytical - San Carlos The results in this report apply to the samples analyzed in accordance with the charm o <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 24 of 30 <br />