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Sequoia 680 Chesapeake [)rive Redwood City, CA 94063 (415) 364-9600 LAX (415) 364-9233 <br /> 404 N Wiget Lane Walnut C.rcek,CA 94599 (5to) 988-9600 FAX (510)988-9673 <br /> Analytical 819 Striker AVMLiC,Cult 8 tiCacramcnto, A 95834 (1)161 921.9600 FAX (9 16 1 931 01()(1 <br /> �ific Environmental Group Client Project ID: 920-078.1A/Chevron 9-0557, Stockton, CA <br /> �T315 Sunrise Gold Circle, Ste. M Matrix: Soil <br /> Rancho Cordova, CA 95742 Reported: Nov 19, 1997 <br /> Attention: Roger Hoffmore QC Sample Group: 7101282-83 p <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Fractional <br /> Organic Carbon <br /> Method: Walkley-Black <br /> Analyst: J. Hills <br /> Date: 11/12/97 <br /> Sample#: 9711371-6 <br /> Sample <br /> Ooncentration: 0.090 % <br /> Sample <br /> Duplicate <br /> Concentration: 0.090 % <br /> % RPD: 0.0 <br /> Control Limits: 0-20% <br /> SEQUOIA ANALYTICAL <br /> da C. Schnei er <br /> roject Manager/Sacramento Laboratory <br /> 7101282.PES <2> <br />