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® Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 N Wiget lane Walnut Creek CA 94598 (510)988-9600 FAX(510)988-9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792.-1865 FAX(707)792-0342 <br /> Cambria Environmental Tech Client Project ID Shell 1071 N Main Manteca <br /> 114465th St , Ste C Matrix Solid <br /> Oakland, CA 94608 <br /> Attention Paul Waite Work Order# 9803J61 01, 03, 04 Reported Apr 15, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Fraction Organic <br /> Carbon <br /> QC Batch IN040898WBOOA <br /> Analy. Method Walkley-Black <br /> Prep Method <br /> Analyst: K Cesar <br /> Duplicate <br /> Sample#: 9803J6102 <br /> Prepared Date: 4/8/98 <br /> OAnalyzed Date: 4/8/98 <br /> nstrument 1 D.#: MANUAL <br /> Sample <br /> Concentration 0 032 <br /> Dup Sample <br /> Concentration 0 036 <br /> RPD 12 <br /> RPD Limit 0-20 <br /> i <br /> EQUOIA ANALYTICAL <br /> 7 &�f <br /> FRrd Herling <br /> Project Manager **RPD=Relative%Difference 9803J61 CCC -�3> <br />