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S SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive • Redwood City CA 94063 <br /> (415) 364 9600 FAX (415) 364 9233 <br /> �Waterwork Client Project ID #322,J B Terminal,Tracy <br /> 1710 Main Street <br /> Escalon,CA 95320 t, <br /> Altenbon Lois Frantz QC Sam le Group 0103786-0103789 R <br /> yy � , sported Nov 9, 1990 <br /> a <br /> QUALITY CONTROL DATA REPORT <br /> d <br /> A ALYTE Benzene Tolueno Ethyl xylenes <br /> Benzene <br /> EPA EPA EPA EPA <br /> Method 8020/8015 8020/8015 8020/8015 8020/8015 <br /> Analyst G Meyer G Meyer G Meyer G Meyer <br /> Reporting Units ng ng ng ng <br /> Date Analyzed Nov S. 1990 Nov 5, 1990 Nov 5. 1390 Nov 5, 1990 <br /> QC Sample# 010-4204 010-4243 010-42G4 01G-4W4 <br /> Sample Cone.: 21 50 N D N D <br /> Spike Cone <br /> Added: 100 100 100 300 <br /> f <br /> Corte.Ml81trix <br /> Spike: 90 95 94 290 <br /> Matrix Spike <br /> %Recovery: 69 90 94 97 <br /> Corte. Matrix <br /> Spike Dup : 135 90 88 270 <br /> Matrix Spike <br /> Duplicate <br /> %Recovery: 64 85 88 91 <br /> Relative <br /> %Difference. 57 54 65 60 <br /> SEQU ANALYTICAL ` %fleca Conc of M S Conc of Sample x 100 <br /> Spike Cana Added <br /> f e%Difference Conc of fA S -Cone of M S D x 100 <br /> 8th W <br /> PHackl Conc of M S + Conc of M S D /2 <br /> ro ct Manager <br /> 103786 WAT <2a <br />