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xV g NWs <br /> SEQUOIA A ALYTICAL <br /> 680 Chesapeake Drive • Redwood City,CA 94063 <br /> (415)364-9600 FAX(415)364-9233 <br /> Data Environment %ansultants Giant Project 1 D:3725 Tracy elvd.,Shell <br /> 3330 Data Drive <br /> Ranchc Cordova,CA 95670 Reported Dec 3 1991 <br /> Attention: Lisa Ranger <br /> QC Sample Group: 111 4 X36 „> <br /> OUALITY CONTROL.DATA REPORT <br /> AfdALYTE Ethyl- <br /> l3equene Toluene Benzene X encs <br /> Method: EPA 8020 <br /> EPA 8020 EPA 8020 EPA 8020 <br /> Analyst: Ai,tAikhtman M.L aikhlman M.Wkhtman M.Laikhtman <br /> Reporting Units: aig/t. Pe1u pg/t- 0/1- <br /> Date Analyzed: Dec 3. 1991 Dec 3. 1991 Dec 3, 1991 Dec 3. 1991 <br /> QC Sample#: GBLK120391 GOLK120391 GBLK120391 GBLK120391 <br /> Sample Conc.: N.D. N.G. N.D. N.D. <br /> tike Cone. 10 t0 30 <br /> Added: i0 <br /> conc.Matrix 10 10 31 <br /> Spike: 10 <br /> Matrix Spike100 100 103 <br /> 96 Recovery: 100 <br /> Conc.Matrix 10 33 <br /> Spike Dup.: 9.4 9.7 <br /> Matrix Spike <br /> Duplicate 100 <br /> Flecovery: 94 97 100 <br /> Relative 3 0.0 3.3 <br /> 06 Difference: 6.2 <br /> _.. _._�.._.= CiQ1A ANALYTICAL, ....... Remve <br /> ry: conc.of M.S. t i0nC.of Sample x 100 <br /> _o -Spike .-C:o c.of S.... <br /> �j 'Relative%Difference: Cnnc.of M.S.-CAnc,of M'S.0. x 100 <br /> Made A.Springer. icon.of M.S.4 conc.of M.S.D.)I2 111� s.D r a2> <br /> Project Manager <br />