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SEQUOIA ANALYTICAL <br /> 819 Striker Avenue, Suite 8 • Sacramento, CA 95834 <br /> (916) 921-9600 • FAX (916) 921-0100 <br /> *ESNAIndustries Client project ID Arco 760-93-2A, Lodi <br /> 3164 Gold Camp Dr, Suite 200 Matrix Sod <br /> Rancho Cordova, CA 95670 <br /> Attention David Stavarek OC Sample Group 401-1132 Reported Jan 31, 1994 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Reactive Reactive <br /> H Flashpoint Sulfide Cyanide <br /> Method: ERA 9040 EPA 1010 SW 846 SW 846 <br /> Analyst: Y Arteaga K Newberry K Newberry M Nguyen <br /> Date- 1/31/94 1/27/94 1/27/94 1/27/94 <br /> Sample#• 9401 F31-01 9401 A73-1 9401 C63-1 9401 C63-1 <br />' Sample <br /> Concentration. 82 >100 N D N D <br /> Sample <br /> Duplicate <br /> Concentration. 81 >100 N D N D <br /> % RPD. 1 2 00 00 00 <br /> Control Limrts• 0-30 0-5 0-20 0-20 <br /> SEQUOIA ANALYTICAL <br /> 7� i <br /> unda C Schneider <br /> Project Manager <br /> 4011132 RES <6> <br />