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SEQUOIA ANALYTICAL _ - - -- <br /> 1900 Bates Avenue • Suite LM • Concord, California 94520 <br /> (415) 686-9600 0 FAX (415) 686-9689 <br /> Applied GeoSystems (Sacramento) Client Project ID ARCO#760 /Lodi <br /> 4191 E Power Inn Rd v <br /> Sacramento, CA 95826 <br /> 'Attention Eloise Fnck OC Sample Group 1 06061 0-1 1 Reported Jun 27, 1991 } <br /> I <br /> QUALITY CONTROL DATA REPORT <br /> JANALYTE Ethyl <br /> I Benzene Toluene Benzene Xylenes <br /> I <br /> Method EPA8015/8020 EPA8015/8020 EPA8015/8020 EPA8015/8020 <br /> Analyst J F/K L J F/K L J F/K L J F/K L <br /> Reporting Units ppm ppm ppm ppm <br /> Date Analyzed Jun 25, 1991 Jun 25, 1991 Jun 25, 1991 Jun 25, 1991 <br /> OC Sample# BLK062191 M BLK062191 M BLK062191 M BLK062191 M <br /> Sample Conc N D N D N D N D <br />*Spike Conc <br /> Added 040 040 040 12 <br /> Conc Matrix <br /> Spike 034 033 034 10 <br /> Matrix Spike <br /> %Recovery 85 83 85 83 <br /> Conc Matrix <br /> Spike Dup 036 034 035 10 <br /> Matrix Spike <br /> Duplicate <br /> %Recovery: 90 85 88 83 <br /> Relative <br /> % Difference, 57 30 29 0 <br /> QEQUOIA ANALYTICAL %Recovery Conc of M S -Conc of Sample x 100 <br /> Spike Conc Added <br /> Relative%Difference Conc of M S -Conc of M S D x 100 <br /> ul a R Malerstein (Conc of M S + Conc of M S D) 2 <br /> Pr lect Manager 1060610 APs <2' <br />