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SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive - Redwood City, CA 94063 <br /> (415) 364-9600 FAX (415) 364-9233 <br /> . ........ <br /> Waterwork Client Project ID: 20241-1, Kooyman Trucking <br /> 11710 Main Street <br /> Escalon, CA 95320 <br /> %�..Attention: Robert Juncal GIC SaTg!,��8 Reported: Dec 6, 1989 <br /> ,. . .................. <br /> M ......... 1. <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Oil&Grease <br /> Method: SM 503 <br /> Analyst: JV <br /> Reporting Units: mg/L <br /> Date Analyzed: Dec 4, 1989 <br /> QC Sample #: Matrix <br /> Sample Conc.: 75 <br /> Spike Conc. <br /> Added: 1000 <br /> Conc. Matrix <br /> Spike: 88 <br /> Matrix Spike <br /> % Recovery: 81 <br /> Conc. Matrix <br /> Spike Dup.: 900 <br /> Matrix Spike <br /> Duplicate <br /> • Recovery: 82 <br /> Relative <br /> • Difference: 1.6 <br /> SEQUOIA %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. X 100 <br /> (Conc.of M.S. + Conc.of M.S.D.)/2 <br /> Project Manager 9113618.WAT <10> <br />