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�• Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364-9600 FAX(415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical Big Straker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Enviros Client Project ID Shelf 4315 Waterloo, Stockton <br /> 270 Perkins Ave Matrix Solid <br /> -Sonoma, CA 95476 <br /> Attention Joe Neely Work Order# 9602H91 -01 Reported Mar 22, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Fractional Organic <br /> Carbon <br /> OC Batch. IND31396FOCSOOA <br /> Analy. Method Walkley-Black <br /> Prep Method - <br /> Analyst: D Lawrence <br /> Duplicate <br /> Sample# 9603543-01 <br /> Prepared Date 3/13/96 <br /> Analyzed Date: 3/13/96 <br /> lastrument I D.# MANUAL <br /> Sample <br /> Concentration. 023 <br /> Dup Sample <br /> Concentration 022 <br /> RPD 44 <br /> RPD Limit. 0-30 <br /> SEQUOIA ANALYTICAL <br /> 19� <br /> Mike Gregory <br /> Project Manager **RPD=Relative% Difference 96021-191 EEE <1> <br />