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Y <br /> a <br /> SEQUOIA ANALYTICAL <br /> WO Imwpeake Anus • Redwood City,CA 94OW RECEIVED MAY 3 <br /> 364-SGW • FAX(415)364-9233 <br /> r0atffr�ywwo�rk ' <br /> Client Project ID:Fieeves E)=r%388 <br /> ain Street <br /> Escalon.CA 95320 <br /> Attention: 8>Zl Channell OC Sample Group:10429W-290 Re ed:l4Ea 1. 1991 <br /> QUALITY CONTROL DATA REPORT <br /> r ANALYTE <br /> Lead Hoxavalerd Chromium Cadmium Chromium Zric bead <br /> Method: EPA 7421 EPA7196 EPA6010 EPA6010 EPA6010 EPA7421 <br /> AnalySt; A Esstmar: Y.Arteaga S.Foster S.Foster S.Faster V.Paul <br /> Reporting Units: mg/kg rrg/kg mg/kg mg/kg mg/kg mg/kg <br /> Date Analyzed: Apr.24, 1991 Apr 19. 1991 Apr 26. 1991 Apr 28. 1991 Apr 26. 1991 Apr 30. 1WI <br /> OC Sample#: 104-2988 104-3085 104-4140 104-4140 104-4140 1042910 <br /> Sample Cone.: 9.3 N.A. 4.2 :5 54 16 <br /> Spike Conc. <br /> �- Added: 50 5.0 250 250 250 50 <br /> Conc.(Matrix <br /> K <br /> ' Spike: 54 4.8 260 .260 270 63 <br /> Matrix Spike <br /> W %Recovery: 89 96 100 94 86 94 <br /> 1 . <br /> Conc.Matrix <br /> Spike Dup.: 53 4.3 220 250 250 58 <br /> Matft Spike <br /> Duplicate <br /> %Recovery: 87 86 86 90 78 84 <br /> Relative <br /> SG Difference: 1.9 11 17 3.9 7.7 8.3 <br /> CE02t IA ANALYTICAL vtryr Conc.of M.S.-Cone.01 Sample :too . <br /> ,-1 <br /> Spike Cone.Added <br /> • 4alive'i CX Ketones; Cone.of M.S.•Conc.of M.S.O. x 100 <br /> � atreth W. acki (Cone.a1 M.S. +Conc.o1 M.S.D.) 2 <br /> P jecI Manager 4042988.YYAT c232, <br />