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SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive • Redwood City,CA 94063 <br /> (415) 364-9600 • FAX(415)364-9233 <br /> .,,n...._.::.,. .:..,:...,,. :..<.,.a,.x-«. <br /> .......e....:<:n<.:d2,c.�.o........ .<4>....,....,.. _..:...._ <br /> '��i�: :cs:�««r.;<:<rw..sc�[xx'«:cays:x:.xr<tx2<.: + :c>:<,.n:<:e:»:<a <br /> pacific Environmental Croup Client Project ID: 310-01.04 ' <br /> 2025 Gateway Place,Suite 440 <br /> [A=on.: Ma.r.ee <br /> ,CA 95110 ed Feb <br /> Doden QC Sample Group: 3A17001-02 Reporte 4, 1993 <br /> f ;nJw:na.... .''�.. G'`"g -' ` ` '::w' fi:`Kz�;rm�: _.m <br /> QUALITY CONTROL DATA REPORT <br /> ANAILYTE Ethyl- <br /> Benzene Toluene Benzene Xylenes <br /> Method: FPA 8020 EPA8= FPASM EPA8o20 <br /> Analyst: M.Nipp M.Nipp M."pp M.Nipp <br /> Reporting Units: pg/L /g/L Pg/L M/L <br /> Date Analyzed: Jan 24 1993 Jan 22, 1993 Jan 22, 1993 Jen 22, 1993 <br /> OC Sample#: 3AO8701 3AO8701 3ADS701 3ADS701 <br /> Sample Conc.: N.D. N.D. N.D. N.D. <br /> Spike Conc. <br /> Added: 10 10 10 30 <br /> Cone.Matrix <br /> Spike: 9.9 9.9 9.8 29 <br /> Matrix Spike' <br /> %Recovery: 99 99 98 97 <br /> Cones Matra <br /> Spike Dup.-. 9.8 9.9 9.6 29 <br /> Matrix Spike <br /> Duplicate <br /> %Recovery: 98 99 96 97 <br /> Relative <br /> %Difference: 1.0 0.0 2.1 0.0 <br /> SEQUOIA ANALYTICAL %Recovery. Conc.of M.S.-Conc.of Sample x 100 <br /> Spike Conc.Added <br /> Relative%Difference: Conc.of M.S.-Cone.of M.S.D. x 100 <br /> Eileen A Manning (Conc.of M.S. + Conc.of M.S.O.)/2 <br /> Project Manager 3An001-PPP <2' <br />