Laserfiche WebLink
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 ethyl <br /> Benzene Toluene Benzene Xylenes <br /> Method: EPA8015/8020 EPA8015/8020 EPA8015/8020 EPA8015/8020 <br /> Analyst: L.Gonzales L.Gonzales L.Gonzales L.Gonzales <br /> ' Reporting Units: ng ng ng ng <br /> Date Analyzed: Mar 4, 1991 Mar 4, 1991 Mar 4, 1991 Mar 4, 1991 <br /> QC Sample#: GBLK030491 GBLK030491 GBLK030491 GBLK030491 <br /> Sample Cone.: 4.0 N.D. N.D. N.D. <br /> ' Spike Cone. <br /> Added: 100 100 100 300 <br /> Conc. Matrix <br /> Spike: 89 91 95 280 <br /> ' Matrix Spike <br /> %Recovery: 85 91 95 93 <br /> Conc. Matrix <br /> ' Spike Dup.: 90 92 95 280 <br /> Matrix Spike <br /> Duplicate <br /> ' %Recovery: 86 92 95 93 <br /> i <br /> ' Relative <br /> %Difference: 1.2 1.1 0 0 <br /> SEQUOIA ANALYTICAL %Recovery: Conc.of M.S.-Conc.of Sample x 100 <br /> V Spike Conc.Added <br /> VRelative%Difference: Conc.of M.S.-Conc.of M.S.D. x 100 <br /> Belinda C.Vega (Conc.of M.S. + Conc.of M.S.D.)/2 <br /> Laboratory Director <br /> #1020587.EEE <4> <br />