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y SEQUOIA ►NALYTICAL <br /> 1900 Bates Avenue • Suite LM • Concord,California 94520 <br /> limp (510) 686-9600 FAX (510) 686-9689 <br /> >:; < :> » :»>::. <br /> .......... . ...........Ka rea1lanEngineering, Project Unocal, 835NavyDrive, .... <br /> Stockton <br /> P.O. Box 996 <br /> Benicia, CA 94510 <br /> >Attention: Mardo Kapreallan, P.E. QC Sample Group: 204-1276 Reported: May 8, 1992 «. <br /> ......................................................................................................................... <br /> ............ <br /> ....... <br /> ..........................................................................................................................................::..:::............... <br /> QUALITY CONTROL DATA REPORT <br /> . i <br /> SURROGATE <br /> EPA EPA <br /> Method: 8015/8020 8015/8020 EPA8015 EPA8015 <br /> Analyst: K.N. K.N. A Tuzon A Tuzon <br /> Reporting Units: ug/L ug/L ug/L ug/L <br /> Date Analyzed: May 1, 1992 May 1, 1992 May 7, 1992 May 4, 1992 <br /> Sample#: 204-1276 Blank 204-1276 Blank <br /> Surrogate - <br /> %Recovery: 100 96 151 144 <br /> f <br /> SEQUOIA ANALYTICAL %Recovery: Cone.of M.S.-Cone.of Sample x 100 <br /> Spike Cone.Added. <br /> Relative%Difference: Cone.of M.S.-Cone.of M.S.D. x 100 <br /> Scott A. Chieffo (Cone.of M.S. + Cone.of M. .D. 2 <br /> Project Manager z PN1276. <a> <br />