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1' <br /> Sequoia 404 N WIS04 Lane . <br /> Walnut Geek CA 94598 <br /> q„p Analytical FAX(925)988-9673 <br /> Gettler Ryan/Geastrategies-Dublin Project Unocal •) <br /> 6747 Sierra Court Suite J Project Number Former Unocal Station 2859 Reported <br /> bu61m CA,94568 Project Manager Deanna L Harding 03-Sep-99 10 15 <br /> -Total-Pu rgeable Hydrocarbons (C&C12);BTEX-and-MTBE-by DRS LUFT-Qu_ality Control- - - -- <br /> Sequoia Analytical -Walnut Creek - <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Bitch 9H31021. Prepared 30-Aug-99 Using EPA 5030B (P/T] <br /> Blank(91131021-BLK1) <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 0 50 " <br /> xylenes(total) _ ND 0 50 " <br /> Niethyt tent-hutyl ether ND 2 5 " <br /> Surrogate aaa-Tnfluorotoluene 288 300 96.0 70430 <br /> LCS(91131021-BS1) <br /> Benzene 21 4 050 up/1 200 107 70.130 <br /> Toluene 193 0 50 200 965 70-130 <br /> Ethylbenzene 21 7 0 50 200 109 70-130 <br /> \}lanes(total) 65 3 050 600 109 70-130 <br /> Surrogate au a Tryhuarowluene ?X 7 300 957 70-130 <br /> LCS Dup (9H31021-BSDI) <br /> Benzene 203 050 ugll 200 101 70-130 528 25 <br /> 1 olu,.ne 192 050 200 910 70-130 587 25 <br /> E.thylbenteric 192 0 su 200 960 70-130 122 25 <br /> xylencs(total) 629 050 600 105 70-130 374 25 <br /> Surrogate as a-Tnfluororoluene 279 300 930 70.130 <br /> Matrix Spike(9H31021-MSI) Source W908392-13 <br /> Benzene 16 5 0 50 ug/l 200 ND 925 60-140 <br /> Toluene 14 2 0 50 200 ND 710 60-140 <br /> Ethylhenzene 15 3 0 50 200 ND 76 5_ -60-I40 <br /> \ylenes(total) 50 5 050 600 ND 842 60-140 <br /> Surrogate as a-Tnfluororoluerre 23 8 30 0 793 70-130 <br /> Sequoia Analytical- Walnut Creek The results to spas report apply to the samples analyzed i n accordnice with the chatn of <br /> cuttoib document Thrs analytical report must be reproduced to its enurery <br /> 1 <br /> ti all ag ey rojec l .in,tger Page 4 of 6 <br />