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s SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive • Redwood City,CA 94063 <br /> (415)364-9600 FAX(415) 364-9233 <br /> Giem Project ID: W06021 C.City of Stockton,Banner Island <br /> l Watwwork <br /> 1710 Main Street <br /> Escalon,CA 96320 2033053 Reported Mar 25 t 992 <br /> BID Channell OC Sample Group -55 ,„ <br /> ;Attention: <br /> QUALITY CONTROL DATA REPORT <br /> lAL mei 9"f vanadium Z nc <br /> Molybdenum <br /> Method: EPA 200.7 EPA 2D0.7 EPA 200.7 EPA 200.7 r EPA 2=7 EPA 24L <br /> bma <br /> Analyst: C Medef"w C.Medefesaer C Medefeaser C.MMdehaae C. <br /> Reporting Units: rt+9/L r"4/L nV/L MIL rr+G/t, /f� <br /> Date Artialyzed: Mar 20. 1942 Mar 20. 1992 Mar�� Marr 20, 1922 <br /> Mw 20. 1� Mar 20, a1� <br /> OC Sample#: 203-MW �30°� <br /> Sample Conc.: N.D. 0.10 <br /> N.D. N.D. 0.17 N.D. <br /> Spike Cone. 1.0 1.0 0.0020 <br /> Added: 1.0 1.0 1.0 <br /> Cone. Matrix 1.1 1,2 0.0019 <br /> Spike: 0.99 1.1 0.92 <br /> Matrix Spike 100 92 110 103 95 <br /> %Recovery: 99 <br /> Cone.Matrix12 0.0019 <br /> Spike Dup.: 0.98 1.1 0.92 1.0 <br /> Matrix Spike <br /> Duplicate 100 92 100 103 95 <br /> %Recovery: 98 <br /> Relative 9.5 0.0 0.0 <br /> %Difference: 1.0 0.0 0.0 <br /> SEQUOIA ANALYTICAL !�Reoorertr Conc.of M.S..(,orx of Sar^p'e '100 <br /> Spike Conc.Aaded <br /> Relit vn%omorence: Cone.al M.S.-Conc.of M.S.D. X 100 <br /> (Canc.of M.S. • Cone.of M.S.D.)/2. 2101 3 WAT <a> <br /> 0 <br /> jef;t Manager <br />