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SEQUOIA ANALYTICAL - - - -� - <br /> 1900 Bates Avenue • Suite LM • Concord, California 94520 <br /> (415) 686-9600 • FAX (415) 686-9689 <br /> i <br /> S ~ <br /> Applied GeoSystems (Sacramento) Client Project ID ARCO #760/#760-91-1 <br /> 5`4191 E Power Inn Rd <br /> Sacramento, CA 95826 <br /> Attention Eloise Frick QC Sample Group 106-0576 Reported Jun 24, 1991 <br /> I) <br /> QUALITY CONTROL DATA REPORT <br /> JANALYTE <br />► Oil&Grease <br /> Method SM 5520 B&F <br /> Analyst D Newcomb <br /> Reporting Units mg/L <br /> Date Analyzed Jun 23, 1991 <br /> i QC Sample# Matrix Blank <br /> 062391 M <br /> Sample Cone : N D <br />�• Spike Cone. <br /> Added: 100 <br /> Cone Matrix <br /> Spike 93 <br /> Matrix Spike <br /> %Recovery 93 <br /> Cone Matrix <br /> Spike Dup.: 87 <br /> Matrix Spike <br /> ;--Duplicate- - <br /> %Recovery: 87 <br /> Relative <br /> %Difference: 69 <br /> Quality Assurance Statement All standard operating procedures and quality control requirements have been met <br /> 0- <br /> SEOUOIA ANALYTICAL %Recovery Conc of M S -Cone of Sample x 100 <br /> Spike Conc Added <br /> Relative%Difference Cone of M S -Conc of MSD x 100 <br /> 4Jta R Malerstein (Cont of M S + Conc of M S D) 2 <br /> Jett Manager 1060575 APS c 17> <br />