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- A -SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue a Suite LM • Concord, California 94520 <br /> (415) 686-9600 0 FAX (415) 686-9689 <br /> • <br /> Applied GeoSystems (Sacramento) Client Project ID ARCO #760/#760-91-1 <br /> 4191 E Power Inn Rd <br /> Sacramento, CA 95826 <br /> Attention Eloise Frick OC Sample Group 106-0575 Reported Jun 24, 1991 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE <br /> Diesel <br /> Method EPAS015 <br /> Analyst R Lee <br /> Reporting Units ng <br /> Date Analyzed Jun 21, 1991 <br /> OC Sample# DBLK062191 <br /> Sample Conc N D <br />• Spike Conc. <br /> Added: 900 <br /> Conc. Matrix <br /> Spike- 900 <br /> Matrix Spike <br /> % Recovery. 100 <br /> Conc. Matrix <br /> Spike Dup.: 850 <br /> Matrix Spike <br />- Duplicate - - - -- <br /> %Recovery: 94 <br /> Relative <br /> %Difference- 57 <br /> Quality Assurance Statement All standard operating procedures and quality control requirements have been met <br /> •SEQUOIA ANALYTICAL %Reoovery Cone of M S -Conc of Sample x 100 <br /> Spike Cone Added <br /> Relative%Difference Cone of M S -Conc of M S D x 100 <br /> JulR Malerstem (Cone of nn S + Cone of M S D) 2 <br /> i Pr lect Manager 1060575 APS <2> <br />