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SEQUOIA ANALYTICAL <br />' 680 Chesapeake Drive a Redwood City, CA 94063 <br />(415) 364-9600 - FAX (415) 364-9233 <br />f <br />ieF2501 AAibraeremont, CA 94538 n <br />'Attention VickieTague CC Sample Group 3618001-08 Reported Feb 12, 1993` <br />'4"4�'�,0 �a.cw ans.ir�id+�ca's.F,a�joS.aa�r�\`�:n���` ^^99�tS2°nor.�Xmffa:?{a.'orrcbtc,:rrrArricv;>.L�S'hvac`v�at..•..d-alta,`,�,�Jhxt'..,w�,�iauSn;,,avnwv�tt 'f ct;5' "4"s <br />QUALITY CONTROL DATA REPORT <br />1 <br />ANALYTE Beryllium Cadmium Chromium Nickel <br />' <br />EPA 6010 <br />EPA 6010 <br />EPA 6010 <br />R. Sharma <br />Method' <br />EPA 6010 <br />mg/kg <br />Analyst: <br />R. Sharma <br />Feb 10, 1993 <br />Reporting Units- <br />mg/kg <br />BLK020M <br />Date Analyzed <br />Feb 10, IM1 <br />' <br />OC Sample # <br />81.1020993 <br />' <br />Sample Conc.: <br />N.D <br />Spike Conc, <br />Added: <br />100 <br />Conc. Matrix <br />Spike: <br />97 <br />'Matrix <br />Spike <br />% Recovery: <br />97 <br />' <br />Conc. Matrix <br />Spike Dup.: <br />97 <br />' <br />Matrix Spike <br />Duplicate <br />% Recovery: <br />97 <br />' <br />Relative <br />% Difference: <br />00 <br />SEQUOIA ANALYTICAL <br />V r <br />ria <br />Le <br />rolect Manager <br />EPA 6010 <br />EPA 6010 <br />EPA 6010 <br />R. Sharma <br />R Sharma <br />R Sharma <br />mg/kg <br />mg/kg <br />mg/kg <br />Feb 10, 1993 <br />Feb 10, 1953 <br />Feb 10, 1993 <br />BLK020M <br />BLK020993 <br />8LK020993 <br />N D <br />N.D. <br />N D <br />100 100 100 <br />91 95 96 <br />91 95 96 <br />.y <br />32 00 10 <br />% RecoveryCone of MCone of ple x 100 <br />Spike Conc Added <br />Relative % Ditference Conc of M S - Conc of KS 0 x 100 <br />(Cone ofMS t Cone of MSD)/2 <br />3BIS001 ENS <2> <br />