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UI JL -j L I - )UAW <br /> SEQUOIA ANALYTICAL <br /> 1900 Bete' <br /> s Avenue * SuilA LM 0 Concord, California 94520 <br /> (510) 886-9600 FAX (510) 686-9689 <br /> ETS Environmomtat Associates Client Proloct 113- #0057 <br /> i!P.O. BOX 2242 <br /> Merced, CA 95344 <br /> Attentlon: Kevin Koehn QC Sample Group: 2020957-981Reported. Mar 2, 1992 <br /> QUALITY CONTROL DATA REPORT <br /> I. LANALYTE <br /> Oil and Orewso STLC Load <br /> Method: SMM20 EPA 7421' <br /> Analyst: R Newonrnh K.Aridormnn <br /> LReporting Units' mg/kg rrg/,L <br /> Date Analyzed; Feb 27, 1992 mpir 2. 1992 <br /> OC Sample Matrix Blank 202-0950 <br /> L <br /> Sample Conc.: N.D. 16 <br /> LSpike Cone. <br /> Added- 5000 5.0 <br /> L <br /> Cone, Matrix <br /> LSpike! 4600 8.6 <br /> Matrix Spike <br /> L %Recovery.' 92 100 <br /> LCone. Matrix <br /> Spike Dup., 4700 8.8 <br /> Matrix Spike <br /> Duplicate <br /> L % Recovery: 94 104 <br /> LRelative <br /> % DIfterence: 2.0 2.3 <br /> L <br /> SEQUOIA ANALYTICAL % Ncovery cone;of M.-S.•Cone,of Sample X 100 <br /> L <br /> Spike Gone.Addod <br /> Relative%Difference: Cone.of M.S.-Cone.of M.S.D. X Ica <br /> Scott A. ieffo (Cono,of M.S. + Colics.of M.S.5.T72 <br /> '790 tt 4� �ieff <br /> L Project Manager <br /> 2020957,ETS -0> <br />