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SEQUOIA ANALYTICAL - - - <br /> 819 Striker Avenue, Suite 8 • Sacramento, CA 95834 <br /> VAQW (916) 921-9600 • FAX (916) 921-0100 <br /> t� <br /> tiP <br /> I <br /> RESNA Industries Client Project ID Arco#760, Lodi <br /> 3164 Gold Camp Or, Suite 200 <br /> Rancho Cordova, CA 95670 <br /> Attention David Stavarek OC Sample Group 2070600-28 Reported Aug 12, 1992 <br /> i <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene Xylenes Diesel <br /> EPA <br /> Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 8015 Mod <br /> Analyst C Chapman C Chapman C Chapman C Chapman Chiaravalloti <br /> Reporting Units ppm ppm ppm ppm ppm <br /> Date Analyzed Aug 5, 1992 Aug 5, 1992 Aug 5, 1992 Aug 5, 1992 Aug 3, 1992 <br /> OC Sample # 207-0653 207-0653 207-0653 207-0653 BLK080392 <br /> Sample Cone : N D N D N D N D N D <br /> y Spike Cone. <br /> Added: 020 020 020 040 15 <br /> Cone. Matrix <br /> Spike 017 017 018 033 13 <br /> f <br /> Matrix Spike <br /> % Recovery, 85 85 90 82 87 <br /> Cone Matrix <br /> 1 Spike Dup : 018 018 019 036 13 <br /> Matrix Spike <br /> Duplicate <br /> % Recovery "` - 90 ` T 90 95 90 87 <br /> 1 <br /> Relative <br /> % Difference 57 57 54 87 00 <br /> Quality Assurance Statement All standard operating procedures and quality control requirements have been met <br /> 1 <br /> SEQUOIA ANALYTICAL %Recovery Conc of M S -Conc of Sample x 100 <br /> ,� Spike Conc Added <br /> �r f, _T Relative%Difference Conc of M S -Conc of M S D x 100 <br /> Michael R Giles (Conc of M S + Conc of M S D) z <br />` Laboratory Director <br /> 2070600 RES <9> <br />