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SEQUOIA ANALYTICAL <br /> 580 Chesapeake Drive - Redwood Oty, CA 94063 <br /> Iwo (415) 364.9600 • FAX (415) 364.9233 <br /> ::f'a;<S;unE�_�i:`?: '.Lris:•`2 3 <..l __-i- 'kq't ..`,v > � <br /> r, \ <br /> -.r!r?+.ns1. .:.0 fir✓.{•��i;,`h.;.���•:' ...f...--��, ..... .i#?:. - J. ern. ♦'�:ti:X1....4.< -..�ki.i`.�a Y! .. ::Wf - .v.....v. .....:.., :.: <br /> .-Matervwork Client Project ID: Westem Stone Products, #60195-1 <br /> M 1710 Main Street <br /> :''Escalon,CA 95320 <br /> Attentlon Joe Knight OC Sample Croup: 0053822-0053627 Reported Jun 11 1990 <br /> 2-frr- r}k§,•i '+.i:. >ryr .`h .::M`� 'J?. iY.:."* t .1 ki .,} i <br /> .r. .n..,.�r.s..ii.LJ....r...?:....,f•Y..:....?C.t:::. .r�'}.r..�.. .n-.-r..\ zr .... :.. .. -. <br /> I <br /> QUALITY CONTROL DATA REPORT <br /> APIA diesei 01esel Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> EPA EPA EPA EPA <br /> Method: EPA 6015 EPA 8915 BM/8015 8020/8015 8020/8015 8020/8015 <br /> Analyst: K.Mitchell K.Mitchell L Erickson L Erickson L Erickson L.EriL*son <br /> Reporting Units: Mg/L v9/L ue/L l+9/L psri/L uta/L <br /> Date Analyzed: Jury 6, 1990 Jun 6, 9890 Jun 4, 1990 Jun 4, 1990 Jun 4, 1990 Jun 4, 1990 <br /> OC Samples#: DI Matrix Matrix 005.3313 005.33t3 005-3313 005-3313 <br /> Sample Conc.: N.D. N.D. N.D. N.D. N.D. N.D. <br /> Spike Conc. <br /> 1100 is 2.0 2.0 2.0 6.0 <br /> i <br /> Conc.Metrix <br /> k; Spike: 290 14 1.4 1.7 2.2 5.6 <br /> trix Spike <br /> i/ %Recovery. 97 93 70 85 110 93 <br /> 2 <br /> Conc.Metrix <br /> t <br /> Spike Clap.: 270 13 1.4 1.7 2.1 5.6 <br /> Mantdx Spike <br /> ' <br /> Duplicate <br /> %Recovery: 90 87 70 85 110 93 <br /> Relative <br /> %Difference: 7.1 7.4 0.0 0.0 4.7 0.0 <br /> SE C A ANALYTICAL %Recovery: Conc.of M.S.-Conc,of Sample x 100 <br /> Spike Conc.Added <br /> Relative%Werence: Conc.of M.S.-Conc.of M.S.D. x 100 <br /> beth W. Hach (Conc.of M.S. + Conc.of M.S.D.) 2 <br /> P act Manager 53B23.WAT <5> <br />