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SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive • Redwood City, CA 94063 <br /> 1415? 364-96500 • FAX 1415) 364-9233 <br /> avr.:. ..... <br /> ac?{Sy.y �• ..:�?.,...-.t'�.:e .. :...... ;> �: nom. ca N- :r;Y». ,. •:.L:': :.a .......��.. ti.<,.,:,.. s....,._: ,... <br /> :>#::.;>.ti•`N,t:>•;,.f-4'f;i�:k�'-. �C'::.{...,::.ox>t:,..r. i;>;': '.s''vfi:k�#.. is�3i:: ...t., >tiaSS. �7�:..:`^ :.c:+:. . <br /> :'Waterwork Client Project ID. Westem Stone Products, #60195-1 <br /> 1710 Main Street <br /> Escalon,CA 95320 <br /> 'Attention: Joe Knight OC Sample Group, 0053822-0053827 Reported Jun 11, 1990 <br /> ro t <br /> .��.,�,,,} <br /> �..� n.>�EE� 1.0.[, <br /> :<•.,?r:�F:n,w}s.c'�c'.'F,:w`tuN�`is...•s<,r n ✓,^?.t•a..f..::t.f.. r��::�: ....r r.:c,„:.. r..Y�:,^�•,,...w3 <br /> QUALITY CONTROL. DATA REPORT <br /> ANALYTE Benzene . Toluene Ethyl xyieneo <br /> Benzene <br /> EPA EPA EPA EPA <br /> Method: 8020/8015 80E0/8015 8020/8015 8=/8015 <br /> Analyst: G.Meyer G.Meyer C.Meyer G.Meyer <br /> Reporting Units: mg/kp mg/kg mg/kg mg/kg <br /> Date Analyzed: Jun 5, 1990 Jun 5, 1960 Jun 5, 1990 Jun 5, 1990 <br /> OC Sample : 005-4501 COS-4501 005-4501 705.4501 <br /> r <br /> Sample Cone.: N.D. 0.0051 N.Q. 0.0061 <br /> Spike Cone. <br /> Added: 0.20 0.20 0.20 0.60 <br /> i <br /> I t <br /> Cone. Matrix <br /> Spike: 0.21 0.21 0.22 0.70 <br /> Matrix Spike <br /> %Recovery: 110 100 110 120 <br /> Cone. Matrix <br /> Spike®up.: 0.21 0.21 0.22 0.67 <br /> Matrix Spike <br /> Duplicate <br /> %Recovery: 110 100 110 110 <br /> Relative <br /> %Difference: 0.0 0.0 0.0 4.4 <br /> SEguo , ANALYTICAL %PAM Cane.of M.S.-Cone.of Semple x 100 <br /> Spike Cone.Added <br /> r / <br /> %Werence: Cone.of M.S.-Cana of M.S.C. x 100 <br /> Wh acki (Cone.of M.S. + Cone.of M.S.D) 2 <br /> Pr ject Manager 53823.WAT <6 a <br /> a <br /> :1 <br />