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SEQUOIA <br /> S14ALYTICAL <br /> 1900 Bates Avenue • Suite LM - Concord, California 94520 <br /> (510) 686-9600 FAX (510)686-9689 <br /> x <br /> Yv:a - v.4rnywcna�r:4;:ws,�•.:sxaro:+.t:.:.yc',...,:yr:^;:o;s.x..;.;::-f.;.0 <br /> .:..::..:....,....,... w,= �mv <br /> nk Protect Engineering of N.Calif. Client Project ID: <br /> #209/60 E: 10th St.,2821 hippie Whippie Road <br /> Union City,CA 94587 - <br /> FAttention: John Mrakovich QC Sample Group. 1110813-081fi Reported: Dec .3, 19911 <br /> - <br /> .,M ..,........:.s:4Yii:•:::-vi:-i:•:-:.:.::.:::._::::.v..:.:::.:nvv.Yy,.Tiy:.i::..:.;:c•::;:::;.s.�.:::r.:...:.....:::.:.:.rv.: - <br /> r,Gnn,.:�,.rva�6so:}.t�fns w.6A.t•.Sw vur.:a•,s.,o-:,,,,..a::s..:,::.a:,.w:;,,::r:;o-::.:..:w.coarooc&v:an:r.;a:L::;ion.,:n:c.,Y.-,:.::, <br /> 3Sii�::�2..... <br /> :.n. .... <br /> 0UAUTY CONTROL DATA`REPO RT <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene Xylenes Lead <br /> EPA EPA EPA EPA <br /> Method: 8015/8020 8015/8020 8015/8020 8015/8020 J EPA 6010 <br /> Analyst: J.Dinsay J.Dinsay J.Dinsay J.Dinsay S.Foster <br /> Reporting Units: PPm ppm ppm PPM mg/k9 <br /> Date Analyzed: Nov 25, 1991 Nov 25, 1991 Nov 25, 1991 Nov 25, 1991 Nov 19, 1991 <br /> QC Sample#: Matrix Blank Matrix Blank Matrix Blank Matrix Blank Matrix Blank <br /> Sample Cone.: N.D. N.D. N.D. N.D. 150 <br /> Spike Conc. <br /> Added: 0.20 0.20 0.20 - 0.60 60 <br /> Conc. Matrix . <br /> Spike: 0.22 '0.22 0.23 0.69 200 <br /> Matrix Spike <br /> %Recovery: 110 110 115 115 83 <br /> Conc, Matrix i <br /> Spike Dup.: 0.22 0.22 0.23'" 0.69 200 <br /> Matrix Spike <br /> Duplicate <br /> %Recovery: 110 110 115 115 83. <br /> Relative <br /> %Difference: 0 0 0 0 '0.0 j <br /> Laboratory blank contained the following analytes: None Detected <br /> EQUOIA ANALYTi L %Recovery: Conc:of M,S. Conc,of Sample x 100 <br /> Spike Conc.Added <br /> Relative%Difference: Conc.of M.S.-Conc.6f M.S.D. x 100 <br /> rject <br /> ai rst m (Conc.of M.S. + Conc,of M.S.D.)/2 <br /> nager 1110814.TPE <10> <br /> i <br />