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SEQU0IA ,IahA ICAL <br /> .Aa <br /> 1900 Bates Avenue • Suite LM • Concord, California 94520 <br /> (510) 686-9600 FAX (510) 686-9689 <br /> :.:}Y.+.�:�:w' bd>:?.J}::^!.i^.:^,:.?a+�i.X.}Mu;:.{j.I,M:?i::x::ayfi.I},v,:fi:vn}::.:8}S};M. :;.;Lt:.:4:.:1:1h.}YnX.}r}:Yu.;x::.}•::>::.,vix.}:l.:.w::.}w::.r v:-::. <br /> '-iii}L}e:kL+:Yf.}.{.xr ,;.Q. ..�C`�--'�--'+n:'l.:r Yi..l., _.r:dv}.;,:, .::i�v'-`:rY..: i./;Y. •,:G.:N.{'•n <br /> ,::i4}:! vii R r.ti..�:.:,.,.r .::.::.:n•:r .,......N.t:...v::x.fi•.v: +:y: <br /> `'`:Tank Protect Engineering <br /> of�N.Calif. Client Project ID: # 0 /60E: lpth St.,Tracy <br /> ?'2821 Whipple Road Method(units): EPA 8010 19/ purged) ' <br /> Q.C. Sample Dates <br /> `rUnion City, CA 94587 Analyst(s): M. Nguyen . <br /> Attention: John Mrakovich QC Sample#: BIk112391 Analyzed: Nov 23, 1991 I <br /> R <br /> e arced: Dec3 1 1 <br /> 99 <br /> ..:�::..,:.:::r:r.::.:..?.::.}:A?.:�:::•�...<.}:?.:ii::;.:,:iii;.,:.}}:.}:::-:�;:::. �::..... .... .. .:..::.: <br /> }:Vitii,rrr.�JY:v...:..xu.+n,n....:...r.:.:.................1..,...._-.:.-,v............:....r :.. - _ - <br /> ..:...«.xJ.wlxvy, <br /> QUALITY CONTROL DATA REPORT <br /> Matrix Conc. Matrix Spike <br /> Conc. Spike Matrix Duplicate Relative <br /> Sample Spike Conc.. Matrix % Spike % °/G. <br /> Analyte Conc. Added Spike Recovery Duplicate Recovery Difference <br /> 1,1-Dichloro- N.D. 14' 13 130 12 120 8.0 <br /> ethene <br /> i. <br /> Trichloroethene N.D. 10 12 120 .' 12- 120 0.0 <br /> Benzene N.D. 10 11 .110 11 110 0.0 <br /> it <br /> Toluene N.D. 10 11 110 10 100 0.0 I� <br /> Chlorobenzene N.D. 10 12 120 11 110 8.7 <br /> Pect <br /> NA YTI L %Recovery: Conc.of M.S.-Conc.of Sample x 100 <br /> Spike Conc.Added <br /> lative%Difference; Conc.of M.S.-Conc.of M.S.D. x 100 <br /> Jule Stein (Conc.of M.S..+ Conc.of M.S.D.)/2 <br /> ager 1110814.TP6 <12> <br /> I <br /> Fs <br /> ' t <br />