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0 <br /> SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive - Redwood City, CA 94063 <br /> (415) 364-9600 FAX (415) 364-9233 <br /> Environmental Science&Engineering Client Project ID: 6-90-5137/Ryder Truck Rental <br /> 4090 Nelson Avenue Ste. J <br /> .,Concord, CA 94520 <br /> ..Attention: Sue Wickham QC Sample Group: 102-0587 Reported: Mar 12, 1991 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Diesel <br /> Method: EPA 8015 <br /> Analyst: K.Mitchell <br /> Reporting Units: ng <br /> Date Analyzed: Mar 4, 1991 <br /> OC Sample #: ELK 2/27/91 <br /> Sample Cone.: N.D. <br /> Spike Cone. <br /> Added: 600 <br /> Cone. Matrix <br /> Spike: 780 <br /> Matrix Spike <br /> %Recovery: 130 <br /> Cone. Matrix <br /> Spike Dup.: 680 <br /> Matrix Spike <br /> Duplicate <br /> %Recovery: . 110 <br /> Relative <br /> % Difference: 9.7 <br /> SEQUOIA ANALYTICAL %Recovery: Cone.of M.S.-Cone.of Sample X 100 <br /> U Spike Cone.Added <br /> Belinda C. Vega Relative%Difference: Cone.of M.S.-Cone.of M.S.D. X 100 <br /> (Gone.of M.S. + Cone.of M.S.D.)/2 <br /> Laboratory Director #1020587.EEE <6> <br />