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SEQUOIA ANALYTICAL __ - <br /> 1900 Bates Avenue a Suite LM • Concord, California 94520 <br /> (415) 686-9600 9 FAX (415) 686-9689 <br /> }TihY.w.ru'AYJGxn.1,{yi+,4+.++. xr n nti v r v v b, S vrrmv-w+ }r r v_ .v i n sib <br /> I Applied GeoSystems (Sacramento) AClient Project IDr #760-91-2 /ARCO#760 - Lodi <br /> 4191 E Power Inn Rd <br /> Sacramento, CA 95826 <br /> Attention M J Hodges OC Sample Group 1060318-20 Reported Jun 18, 1991 <br /> I � _ <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyi <br /> Benzene Toluene Benzene Xylenes <br /> I <br /> Method EPAS015/8020 EPAS015/8020 EPAW15/8020 EPA8015/8020 <br /> Analyst RH /JF RH /JF RH /JF RH /JF <br /> Reporting Units ppm ppm ppm ppm <br /> Date Analyzed Jun 17, 1991 Jun 17, 1991 Jun 17, 1991 Jun 17, 1991 <br /> QC Sample# BLK061791 BLK061791 BLK061791 BLK061791 <br /> Sample Conc.: N D N D N D N D <br /> 0 <br /> I Spike Conc <br /> Added: 040 040 040 12 <br /> Conc. Matrix <br /> Spike: 031 029 034 1 0 <br /> Matnx Spike <br /> %Recovery- 78 73 85 83 <br /> Conc. Matnx <br /> Spike Dup.: 036 035 041 12 <br /> Matnx Spike <br /> Duplicate <br /> %Recovery: 90 88 100 100 <br /> M <br /> Relative <br /> %Difference: 15 19 19 18 <br /> Quality Assurance Statement All standard operating procedures and quality control requirements have been met <br /> I <br /> SEQUOIA ANALYTICAL %Recovery, Conc of M S -Conc of Sample x 100 <br /> Spike Conc Added <br /> Reiawme%Difference Conc of M S -Conc of M S D x 100 <br /> J R Malerstein (Conc of M S t Conc of M S D) 2 <br /> I P Manager 106031SAPS e-2> <br />