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w <br /> , F <br /> a <br /> 151. <br /> S <br /> SEQUOIA ANALYTICAL <br /> 1900 Bates AvenuE:FAX(51101 t-�Mr.1 n9639 <br /> cord .Catitornia 94520 <br /> (510)6$£•9066 <br /> Kaprealian Engineering,Inc. Client Project ID: Unocal/Lodi,601 E.Ketileman Ln. <br /> P.O.Box 996 <br /> Eenicia,CA 94510Reported: Sep 24, 1991. <br /> Attention: Mardo Kaprealian,P.E. OC Sample Group. 109C8t0-12 <br /> QUALITY CONTROL DATA REPORT <br /> ,�— Ethyl• <br /> TNALYTE Toluene Benzene xylenes <br /> Benzene <br /> EPA <br /> EPA EPA EPA <br /> Method: 8015/8020 8015/8020 8015/6020 8015/8020 <br /> Analyst: RH/J.F. R.M./J.F. R.H./J,F. <br /> y u9/L ug/t. ug/L <br /> Reporting Units: ug/L <br /> Date A+,ialyzed: Sep 13, 1993 Sep 13, 1491 hep 13, 1991 Sep 13, 1997 <br /> QC Sample#: Matrix Blank Matrix Btank matrix Blank Matrix Blank <br /> Sample Colic.: N.D. <br /> N.D. N.D. N.D. <br /> Spike Conc. 20 20 20 60 <br /> Added: <br /> Conc.Matrix 42 19 22 70 <br /> Spike: <br /> Matrix Spike 110 95 110 120 <br /> %Recovery: <br /> Conc.Matrix 22 19 23 70 <br /> Spike Dup.: <br /> Matrix Spike <br /> Duplicate 95 120 120 <br /> %Recovery: 710 <br /> Retative 0 q.4 0 <br /> %Difference: 0 <br /> Laboratory blank contained the following analytes: None Detected <br /> Conc.0'M.S.-Cont.of Sample x 100 <br /> --...__. —.----..__SEQUOIA ANALYTICAL_- <br /> Relative%Difference: Conc.of M.S.-Conc.of M.S.D. <br /> x 100 <br /> (Cone.or M.S.+Conc.of M.S.D.)42 <br /> Belinda C.Vega 1090810.KEl <2> <br /> Laboratory Director <br />