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Sequoia <br /> 080 Chesapeake Drive Redwood Ccty CA 94063 (415) 364 9600 eaX (415) 364 9333 <br /> 1900 Bates Avenue Suite L Concord CA 94520 1510) 686 9600 FAX(510) 686 9689 <br /> Analytical <br /> } 319 Straker Avenue Suite 8 Sacramento CA 95834 '9t6) 921 9600 FAX(916)921 0100 <br /> r <br /> Brown & Caldwell Client Project ID Arco 2133-94-4A Stockton CA <br /> r� 9616 Micron Ave Suite 600 Matrix Sod <br /> Sacramento, CA 95827 <br /> Attention Steve Misner QC Sample Group 408-0886 Reported Aug 30 1994 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Reactive Reactive <br /> Flashpoint pH Sulfide Cyanide <br /> Method EPA 1010 EPA 9045 SW 846 SW 845 <br /> Analyst K Newberry Y Arteaga K Newberry J Helder <br /> Date 8/24/94 8/25/94 8/23/94 8/23/94 <br /> Sample# 9408877-1 9408C48-01 9408C48-1 9408C48-1 <br /> Sample <br /> Concentration >100 68 ND ND <br /> Sample <br /> Duplicate <br /> Concentration >100 68 N D N D <br /> % RPD 00 00 00 00 <br /> Control Limits ±5 0°C 0-30 0-20 0-20 <br /> SEQUOIA ANALYTICAL <br /> ' 11l00'� <br /> Jennie Higgins <br /> Project Manager <br /> 4080886 BRS <6> <br />