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SEQUOIAw'ANALYTICAL <br /> 680 Chesapeake Drive •e Redwood City, CA 94063 <br /> (415) 364-9600 • FAX (415) 364-9233 <br /> .......................... <br /> ... <br /> ., ........... <br /> .."Waterwork <br /> Client Project ID: #490, Tfior'pe Weber Ave. .......... <br /> 1710 Main Street <br /> "."Escalon, CA 95320 <br /> Bill ChannellQC Sample Group: 1041933-1934 Reported: Apr 25, 1991 <br /> ............ <br /> QUALITY CONTROL DATA REPORTI <br /> i1 0 <br /> ANALYTE Trichloro- Chloro- <br /> 1,11-01chloroethene ethane benzene <br /> Method: EPA 8010 EPA 8010 EPA 8010 <br /> Analyst: E.Hamilton E.Hamilton E.Hamilton <br /> J <br /> Reporting Units: lig/kg pg/kg jig/kg <br /> Date Analyzed: Apr 18, *91 Apr 18, 1991 Apr 18, 1991 <br /> OC Sample #- Matrix Matrix Matrix <br /> Sample Conc.: N.D. N.D. N.D. <br /> Spike Conc. <br /> Added: 10 10 10 <br /> Conc. Matrix <br /> Spike: 9.9 10 11 <br /> Matrix Spike <br /> % Recovery: 99 100 110 <br /> F <br /> Conc. Matrix <br /> Spike Dup.., 8.5 10 11 <br /> Matrix Spike <br /> Duplicate <br /> %Recovery: 85 100 110 <br /> Il i <br /> Relative <br /> % Difference: 15 0.0 0.0 <br /> is <br /> SEQUOIA ANALYTICA %Recovery: Conc.of M.S.-Conc.of Sample x 100 <br /> Spike Conc.Added <br /> Relative%Difference: Conc.of M.S.-Conc.of M.S.D. 100 <br /> --,Ii abeth W. Hackl (Cone.of M.S. + Cone.of M,S.D.) 2 <br /> P Pject Manager 1041931.WAT <9> <br />