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N1 <br /> SEQUOIA A ,ALYTI L <br /> 819 Striker Avenue; Suite 8 a Sacramento, CA 95834 <br /> (916) 921.9600 • FAX (916) 921.0100 <br /> RESNA Industries Client Project!D: Arco#2076, Lodi <br /> :3164 Cold Camp Drive,Suite 200 <br /> Rancho Cordova,CA 95670 <br /> Attention: Eloise Frick QC Sample Group: 1120001-02 Reported: Dec 3, 1991 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Eenzane Toluene 0enzene Xylenes <br /> Method: EPA 8020 EPA 8020 EPA 8020 EPA 6020 <br /> Analyst: C.Chapman C.Chapman C.Chapman C.Chapman <br /> Reporting Units: ppnl ppm ppm ppm <br /> Date Analyzed: Dec 2, 1991 Dec 2, 1991 Dec 2. 1x91 Dec 2, 1991 <br /> QC Sample#: 111.0422 111-0422 111.0422 111.0422 <br /> Sample Conc: N.D. N.D. N.D. N-D. <br /> Spike Conc. <br /> Added: 0.20 0.20 0.20 0.40 <br /> Conc.Matrix <br /> Spike. 0.19 0.19 0.19 0.39 <br /> Matrix Spike <br /> %Recovery: 95 95 95 98 <br /> Conc.Matrix <br /> Spike Dup.: 0.19 0.19 0.19 0.39 <br /> Matrix Spike <br /> Duplicate <br /> %Recovery: 95 95 95 98 <br /> Relative <br /> %,Difference: 2.1 1.1 1.1 2.1 <br /> Quality Assurance Statement: All standard operating procedures and quality control requirements have been met_ <br /> SEQUOIA ANALYTICAL a Recovery: Conc.of M.S.-Conc.of Sample x 100 <br /> Spirts Conc.Added <br /> Relative a Difference: Cana.of ILLS.•Conc.of M.S.D. x 100 <br /> Rick R.DiMa10 4conc.o1 M.S.+Conc,of M.S.D.)/2 <br /> Project Manager 1120001.RES <2> <br />