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1 ' <br /> SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive • Redwood City, CA 94063 <br /> 5 (415) 364-9600 • FAX(415) 364-9233 <br /> :::I 1"1NA Client Project ID. F7132.32, Buick Stop #132 Analyst. R. Lister <br /> 3315 Almaden Expwy., Suite 34 EPA Method: EPA 8015, Water <br /> >San Jose, CA 95118 Units: pg/L Analyzed: May 27, 1993 <br /> Attention Rich Garlow OC Sample Group 3EA0801 2 Reported Jun 2 1993 <br /> HYDROCARBON QUALITY CONTROL DATA REPORT <br /> ACCURACY ASSESMENT PRECISION ASSESSMENT <br /> Laboratory Control Sample Sample Duplicate <br /> ' ANALYTE Gasoline ANALYTE Volatile <br /> Hydrocarbons <br /> Spike Conc. Sample <br /> Added: 100 Number: 305-1230 <br /> ' Spike Result: 100 Original <br /> Result: 59000 <br /> ' Recovery: 100 Duplicate <br /> Result: 66000 <br /> Upper Control <br /> Limit%: 120 Relative% <br /> Difference: Relative Percent Difference values are not <br /> reported at sample concentration levels <br /> ' <br /> Lower Control less than 10 times the Detection Limit. <br /> Limit%: 80 <br /> Maximum <br /> ' RDP: 20 <br /> 1 <br /> SEQUOIA ANALYTICAL %Recovery: Conc.of M.S.-Conc.of Sample x 100 <br /> I Spike no.Added <br /> �JGY j �( �(�� Relative%Difference: Conc.of M.S.-Conc.of M.S.D. x 100 <br /> ' Vickie Ta e (Conc.of M. . + Conc.of M.S.D.)/2 <br /> Project Manager 3EAOB01.RE5 <3> <br /> 1 ' <br />