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SY QUOIA ANALYTICAL <br /> 680 Chesapeake Drive Redwood City,CA 94063 <br /> (415) 364-9600 FAX(415)364-9233 <br /> ..............: <br /> iitiv:nw:::m..v v. <br /> f <br /> :{pi..vvn vxwvi:: <br /> A <br /> Client Project ID: M195.00,Western <br /> 1710 Main Street Stone+Products nrac <br /> €` <br /> €'Escalon, CA 95320 i <br /> <-iAttention: Greg Stahl OC Sample Group: 2101842-50 <br /> ..................�.,.....:....N....:.:...:::....v..... ;.:�,:.. a rted: Oct <br /> .n.....Ci::ryi:}:ii:}\ti\ii%ry:ii::i'::�:v':::ii:4}v:'4:;•v�\\:\} :+C%:.:[Ap-.:irc:.vYpvni::�•.iiii:.i.. <br /> QUALITY CONTROL DATA REPORT C <br /> ANALYTE Ethyl- Extractable <br /> Benzene Toluene benzene Xylenes Hydrocarbons <br /> Method: EPA 8020 <br /> EPA 8o2o 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 f <br /> Date Analyzed: Oct 14, 1992 Oct 14, 1992 Oct 14, 1992 Oct 14, 1992 Oct 13, 1992 <br /> OC Sample#: GBLK101492 GBLK101492 GBLK101492 GSLK101492 DBLK1o1392 <br /> MS/MSD MS/MSD MS/MSD MS/MSD <br /> Sample Conc: N.D. N.D. N.D. N.D. N.D. <br /> Spike Conc. <br /> Added: 0.20 0.20 0.20 0.60 15 <br /> Conc. Matrix <br /> Spike: 0.16 0.16 0.16 0.48 11 <br /> i <br /> I <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 73 <br /> Relative <br /> %Difference: 0.0 0.0 6.5 4.3 0.0 <br /> t <br /> SEQUOIA ANALYTICAL %Recovery: Conc.of M.S.-Conc.of Sample x 100 <br /> Spike Conc.Added <br /> W I Relative%Difference: Conc.of M.S.-Conc.of M.S.O. x 100 <br /> Frorj1ea Lee (Conc.of M.S. + Conc.of M.S.D.) 2 <br /> ct Manager 2101840.WAT i <br /> 4 <br /> I <br />