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SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive • Redwood City, CA 94063 <br /> (415) 364-9600 FAX(415) 364-9233 <br /> .:: s::..,:.::ry:rv,:..:...:n.:n.;.,:..... . ............u.:,.tt.::::.u:.v...v:..ry..,:,...:.._::::...:..........v _ <br /> .:: <br /> •:f.. - .:..{...0.0.::0.{..:}'irv0.:.{ i�:$.?:C`:S.?.i:�' - i:�i:ih •':�v{Jitiv:: �:::s �i•'�4..:: <br /> .s•:::..v:::.::::: .:�.. . <br /> ..:. ...�........... 0nvx.4i:'$�•r:{r::��.:..............:t....-...{.:.fn•.vn.:r::nv:.:�.............-i:;.. R:{i:�A:rv• �v.rvtnwrnr_'.�ry.}{.r:.mr:^:'.']C�' �i: <br /> RESNA Client Project ID: W0195.00,Western Stone Products/TracyxF n : <br /> y 1710 Main Street <br /> A Escalon, CA 95320 r" <br /> X. <br /> X. <br /> ,<< <br /> «Attention: Greg Stahl QC Sample Group: 2101842-50 Re <br /> v.::r.:....�..ry...:..k::....:.... ry:.{..: : . v.::.....n..: <br /> -.::.n.: ry r .:.:,.:....,.. . ........1..:.....:....:.:..........:{::... . ........,.,....:.v:.v::.::.:_:::.::.:_..:::.;. Reported: Oct 1992t <br /> r r... .. ...............:..:.....:..:.w..v.U..::.: : ::.v.:v:.vryv�•0.f, <br /> ............:.:.:........:r.:..1...........n...........................O:A- � 0:......v:........:::::n:.v:.:v.1v.1..n.:n.:n..1.v::inv::v::.:t.:.0.:{U::.u.ry.0.�:.s:.::.-::::...U:o._:::4.:-N ..fi'.• ..C:k:v :'�:7M]{.'O.7L:v::�.:--OM1{{ <br /> •n1 r. ..:.::. x:...0-••:0:1 <br /> ........... ............... n.n.:r.�::.�::..:::^:{0..:.(:vnw.:.............- ':v0+kmnn.n-:n}....::......:.. <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- Extractable <br /> Benzene Toluene benzene Xylenes hydrocarbons <br /> Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015 <br /> Analyst: E.Cunanan E.Cunanan E.Cunanan E.Cunanan R.Lee <br /> Reporting Units: mg/kg mg/kg mg/kg mg/kg mg/kg <br /> Date Analyzed: Oct 14, 1992 Oct 14, 1992 Oct 14, 1992 Oct 14, 1992 Oct 13, 1992 <br /> QC Sample #: G13LK101492 GBLK101492 GBLK101492 GBLK101492 OBLK101392 <br /> MS/MSD MS/MSD MS/MSD MS/MSD <br /> Sample Cone.: N.D. N.D. N.D. N.D. N.D. <br /> `-- Spike Cone. <br /> Added: 0.20 0.20 0.20 0.60 15 <br /> Cone. Matrix <br /> Spike: 0.16 0.16 0.16 0.48 11 <br /> Matrix Spike <br /> %Recovery: 80 80 80 80 73 <br /> Conc. Matrix <br /> Spike Dup.: 0.16 0.16 0.15 0.46 11 <br /> Matrix Spike <br /> Duplicate <br /> % Recovery: ! 80 80 75 . 77 <br /> Relative <br /> % Difference: 0.0 0.0 6.5 4.3 0.0 <br /> SEQUOIA ANALYTICAL %Recovery: Conc.of M.S.-_Conc.of Sample x 100 <br /> Spike Conc.Added <br /> �Q Relative%Difference: Conc.of M.S.-Conc.of M.S.Q. x 100 <br /> ria Lee (Conc.of M.S. + Conc.of M.S.D.)/2 <br /> Jroject Manager 2101840.WAT <9> <br />