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j SgQuo ' ANALYTICAL <br /> 680 Chesapeake Drive • Redwood City, CA 94063 <br /> (415) 364-9600 - FAX(415) 364-964-9 233 <br /> I <br /> :.:.:::::..........:..............:.:.....:.:...�.--»,rte. ,.._..�. �....,. <br /> RESNA .. .--- ......................<.,:.::.,�:::::. , .w`�`.n.. :::.:.::.k;:. ....:n.:n.;�.,.: <br /> ::. +.uvvvta��k:m::J»»:cr.:sa:»:iY.Gd: <br /> Client Project ID: W0195.00,We' Stone Products/ racy <br /> 1710 Main Street <br /> -.1 Escalon, CA 95320 <> <br /> -Attn i QC Sam • 210184 <br /> e t on: Greg Stahl <br /> 9�.w..m le Group: 2-50 Reported <br /> .� 7, 9w <br /> :.::a..as»`a»akai:.U..::o: .::. ...... ..,....:..:; .: •< .:. �.,...:, .::pa„ay3RrofSyooa�.cYA,A»z�unafowbaBReie�d�<d.S'avtie' <br /> OctCt 2 1992 <br /> n:i hNYAiWi»`.4A%y::A'(J.5h4.wW.:P`:»R:vS»dtLTYi •::.••••••......•:n�.::: :n.: ..:. .. - <br /> �9:�.4AG4.\\\�J::4Jxv.U2t2` W4C••:• .:.y . <br /> I <br /> I <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene E Toluene benzene Xylenes <br /> Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst: C.Donohue C.Donohue C.Donohue C.Donohue I <br /> Reporting Units: mg/kg 4 mg/kg mg/kg mg/kg <br /> Date Analyzed: Oct 15, 1992 Oct 15, 1992 Oct 15, 1992 Oct 15, 1992 <br /> QC Sample#: GBLK101592 GBLK101592 GBLK101592 GBLK101592 <br /> MS/MSD f MS/MSD MS/MSD MS/MSD <br /> Sample Conc: N.D. N.D. N.D. N.D. <br /> i <br /> f <br /> Spike Conc. <br /> Added: 0.20 f 0.20 020 0.60 <br /> Conc. Matrix <br /> Spike: 021 f 0.21 0.21 0.62 <br /> Matrix Spike <br /> %Recovery: 105 105 105 105 <br /> Conc. Matrix <br /> Spike Dup.: 023 0.23 0.23 0.68 <br /> Matrix Spike <br /> Duplicate <br /> %Recovery: 115 115 115 113 <br /> — I <br /> Relative <br /> %Difference: 9.1 9.1 9.1 9.2 <br /> i <br /> SEQUOIA ANALYTICAL %Reoo'ery: Conc.of M.S.-Conc.of Sample x 100 <br /> Spike Conn.Added <br /> Relative%Difference: Cone.of M.S.-Conc.of M.S.D. x 100 <br /> rriae (Conc.of M.S. + Conc.of M.S.D.) 2 <br /> Manager 2101840.WAT <10> <br />