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1 <br /> SEQUOIA ANALYTICAL <br /> 819 Striker Avenue, Suite 8 • Sacramento CA 95834 <br /> (916) 921-9600 • FAX (916) 921 0100 <br /> RESIVA lndu" - �. . <br /> stnesNv. w Client Project ID Arco #2076, Lodi <br /> 3164 Gold Camp Dr, Suite 200 <br /> Rancho Cordova, CA 95670 <br /> Attention Jay Johnson CC Sample Group 210-0500 Reported Oct 22, 1992 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE STLC <br /> Benzene Toluene Ethylbenzene Xylenes Lead Sulfide Cyanide <br /> Method EPA 8020 EPA 8020 EPA 8024 EPA 8020 EPA 6010 EPA 9430 EPA 9010 <br /> Analyst Chiaravalloti Chiaravalloti Chiaravalloti Chiaravallote S Foster K Follett A Sawa <br /> Reporting Units mg/kg mg/kg mg/kg mg/kg mg/L mg/kg mg/kg <br /> I Date Analyzed Oct 19, 1992 Oct 19, 1992 Oct 19, 1992 Oct 19, 1992 Oct 21, 1992 Oct 19, 1992 Oct 15, 1992 <br /> OC Sample# 210-0224 210-0220 210-0220 210-0220 210-0530 210-2505 210-0765 <br /> Sample Conc N D N D N D N D N D N D 14 <br />'i Spike Conc. <br /> Added: 020 020 020 040 30 1300 29 <br /> Conc Matrix <br /> Spike. 017 017 018 037 29 1500 36 <br /> Matrix Spike <br /> %Recovery- 85 85 90 93 97 115 76 <br /> Conc. Matrix <br /> Spike Dup.- 018 018 019 038 31 1500 36 <br /> Matrix Spike <br /> Duplicate <br /> % Recovery: 90 90 95 95 103 115 76 <br /> Relative <br /> % Difference: 57 57 54 27 67 00 00 <br /> Quality Assurance Statement All standard operating procedures and quality control requirements have been met <br />. SEQUOIA ANALYTICAL %Recovery Conc of M S -Conc of Sample x 100 <br /> Lz �/J Spike Conc Added <br /> &ty <br /> Relative%Difference Conc of M S -Conc of M S D x 100 <br /> Michael R Giles (Conc of M S + Conc of M S D) 2 <br /> Laboratory Director <br /> 2100500 RES <5> <br />