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SEQUOIA ANALYTICAL <br /> ' <br /> 80 Chesapeake rive • Redwood 6 pealce D City, CA 94063 <br /> (415) 364-8600 • FAX{415} 364-9233 <br /> --- ----------------------- - -------? <br /> RESNA gient Prosect ID W0623, Falcon Fre Station #2 <br /> z 1710 Main Street <br /> Escalon, CA 95320 <br /> ' jAttention: John Lane OC Sample Group 2044327-8 Reported: May 7, 1992 <br /> ' QUALITY CONTROL DATA REPORT <br /> n <br /> ' ANALYTE Eftry4- <br /> Benzene Toluene bermene Xylenes Diesel <br /> Method- EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015 <br /> Analyst R Eastman R Eastman R Eastman R Eastman M Tran <br /> Reporting Units- mg/kg mg/kg mg/kg mg/kg mg/kg <br /> Date Analyzed: Apr 27, 1992 Apr 27, 1992 Apr 27. 1992 Apr 27, 1992 Apr 29, 1992 <br /> OC Sample#: GBLK04ZM GBLK042792 GBLK042792 GBLK042792 DBLK042992 <br /> Sample Cone.: 00060 N.D N D. N D N.D. <br /> 6 Spike Cone. <br /> Added: 0.20 0.20 0.20 060 15 <br /> ' Conc. Matrix <br /> Spike: 0.18 0.18 018 054 10 <br /> ' Matrix Spike <br /> %Recovery: 87 90 90 90 67 <br /> Cone. Matrix <br /> Spike Dup.: 0.19 0.19 020 057 10 <br /> Matnx Spike <br /> Duplicate <br /> % Recovery: 95 95 100 95 67 <br /> ' Relative <br /> % Difference: 54 54 11 54 00 <br /> EQUOIA ANALYTICAL %Recovery- Cone of M S -Conc of Sample x 100 <br /> Spike Conc Added <br /> Ut e Relative%Ddference Cone of M S -Cone of MSD x 100 <br /> a la C.Eg (Conc of M S + Conc of M S D) 2 <br /> ' P olect Manager 2044327 WAT <10> <br />