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SEQU011 ANALYTICAL 680 Chesapeake Drive - Redwood City, CA 94063 <br /> (415) 364-9600 FAX (415) 364-9233 <br /> aterwork Client Project ID: Mike Lopez <br /> .1710 Main Street <br /> Escalon, CA 95320 R IE C E I V E" <br /> 'Attention: C. Battram OC Sample Group: 910-1496 ( <br /> RepoftI sr <br /> 5B,OctPt <br /> ENVIRONMENTAL HEALTH <br /> QUALITY CONTROL DATA REPORT PERM IT"SERVICES <br /> ANALYTE Toluene Ethyl Xylenes <br /> Benzene <br /> EPA EPA EPA <br /> Method: 8015/8020 8015/8020 8015/8020 <br /> Analyst: G. Spak G. Spak G. Spak <br /> Reporting Units: mg/kg mg/kg mg/kg <br /> Date Analyzed: Oct 16, 1989 Oct 16, 1989 Oct 16, 1989 <br /> OC Sample #: 910-2118 910-2118 910-2118 <br /> Sample Conc.: N.D. N.D. N.D. <br /> Spike Conc. <br /> Added: 1.0 1.0 3.0 <br /> Conic. Matrix <br /> Spike: 0.64 0.92 2.7 <br /> Matrix Spike <br /> %Recovery: 64 92 90 <br /> Conc. Matrix <br /> Spike Dup.: 0.69 0.97 2.7 <br /> Matrix Spike <br /> Duplicate <br /> • Recovery: 69 97 90 <br /> Relative <br /> •Difference: 7.5 5.3 0.0 <br /> SEQUOIA ANALYTICAL %Recovery: Cone.of M.S.-Conc.of Sample X 100 <br /> Spike Cone.Added <br /> Relative%Difference: Cone.of M.S.-Cone.of M.S.D. X 100 <br /> beth W Hack! (Cone.of M.S. + Cone.of M.S.D.) /2 <br /> Manager gctle 4 9101496.WAT <2> <br />