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SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive • Redwood City,CA 94063 <br /> (A, )364-9600 • FAX(415)365-9233 <br /> E ; <br /> �. Waterwtlrk Client Project ID:W0388,Reeves on <br /> 1710 Main Street <br /> E <br /> lAttention: <br /> Escalon,CA 95320 <br /> Lois Frantz OC Sam a Group 112-3913,3915-6 Reported:Jan 6, 1992 <br /> - P' .4�Zt���2 .'+x`ry'',�,^r'.°.. .-�,��ioa� "";d:>a�azsi#.�. 3"Yx • >s+tµ`�a "'"^sveu y. "�,�.. art�xgwue -. <br /> 1 E <br /> �. QUALITY CONTROL DATA REPORT <br /> ANALYSE <br /> Ethyl. <br /> F' Benzene Totuene benzene Xylenes <br /> is <br /> ie <br /> Method: EPA 8020 EPA 8020 EPA SM FPA 8020 <br /> Analyst: C.Donohue C.Donohue C.Donohue C.Donohue <br /> Reporting Units: mg/kg mg/kg mg/kg mg/kg <br /> Date Analyzed: pec 77, 1991 Dec 27, 1991 Dec 27. 1991 Dec 27. 1991 <br /> OC Sample#: GBLK122791 GBLK12z791 GBLK122791 GBLK122791 <br /> Sample Cone.: N.D. N.D. N.D. N.D. <br /> 4 <br /> Spike Corte. <br /> Added: 0.20 0.20 0.20 0.60 <br /> t I , <br /> ees <br /> Cone.Matrix <br /> Spike: 0.18 0.19 0.19 0.56 <br /> ., Matrix Spike <br /> /o Recovery: - 90 95 95 93 - <br /> Cone.Matrix <br /> Spike Dup.: 0.19 0.19 0.19 0.57 <br /> Matrix Spike <br /> Duplicate <br /> %Recovery: 95 95 95 95 <br /> Relative <br /> `" %Difference: 5.4 0.0 0.0 1.8 <br /> SEQUOIA ANALYTICAL x geeovery: Conc.of 61,5.•Conc.of Sample x 100 <br /> Spike Cone.Added <br /> e Q Aelative%Difference: Cone,of M.S.•Cone.of M.S.D. x 100 <br /> d <br /> /// lX� (Cone,of M.S.+Cone.of M.S.D.i/2 <br /> f i'o act Mhnaser 1123943.WAT a9> <br />