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p.� p ., <br /> SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive • Redwood City,CA 94063 <br /> (415)364.9600 FAX(415)364-9233 <br /> 1/laterworfc ��� Client Project ID: Eckhoim <br /> h 1710 Main Street <br /> O'Escalon,CA 95320 <br /> Attention BRI Channell OC Sample Group: 1043733-3740Reported May 6, 1991 <br /> »' A, <br /> OUAUTY CONTROL_DATA REPORT <br /> ANALYTE 1,14Dichbro- Trichbro- Chbno- <br /> ether *then* benzene <br /> Method: EPA 8010 EPA 8010 EPA 8010 <br /> Analyst: J.Viifar J.Mfler J.Ykllar <br /> Reporting Units: ug/kg }ug/kg POO <br /> Date Analyzed: Apr 26, 1191 Apr 26, 1991 Apr 23, 1991 <br /> OC Sample#: sf..ft 042691 BLK o42S91 su ws91 <br /> Sample Conc.: N.D. N.D. N.D- <br /> Spike Conc. <br /> Added: 50 50 50 <br /> Conc.Matrix <br /> Spike: 47 43 48 <br /> Matrix Spike <br /> %Recovery: 94 86 96 <br /> Conc.Matrix <br /> Spike Dup.: 51 44 49 <br /> Matrix Spike <br /> Duplicate <br /> %Recovery: 100 88 98 <br /> Relative <br /> %Difference: 8.2 2.3 2.1 <br /> 4ta) <br /> ANALY V CAL % ry Conc.of M.S.-Cane.of Sampia x 100 <br /> Spike Conc.Added <br /> larhv X Diffmance: Conc.of M.S.-Conc.of M.S.O. x 100 <br /> h f'laC Conc.of M.S.+Canc,of M.S.D. 2 <br /> Manager1043M.wAT <10> <br />