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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 /> RESNA Industries Client Project ID Arco #2076, Lodi <br /> '3164 Gold Camp Drive, Suite 200 <br /> Rancho Cordova, CA 95670 <br /> Attention Eloise Frick OC Sample Group 1110749-50 Reported Dec 5, 1991 <br /> QUALITY CONTROL DATA REPORT <br /> 1 ANALYTE STLC STLC STLC STLC STLC <br /> Cadmium Chromium Nickel Zinc Lead <br /> Method EPA 8010 EPA 6010 EPA 6010 EPA 6010 EPA 6010 <br /> Analyst Ch+aravalloti Ch+aravallot+ Chiaravaliotl Chiaravallot+ Chiaravallot+ <br /> Reporting Units mg/L mg/L mg/L mg/L mg/L <br /> 1 Date Analyzed Dec 4, 1991 Dec 4 1991 Dec 4, 1991--Dec 4, 1991 Dec 4 1941 <br /> OC Sample # 111-0725 111-0725 111 0725 111-0725 111-0725 <br /> Sample Cone N D 0 027 N D 32 043 <br /> Spike Cone <br /> Added- 50 50 50 50 050 <br /> Cone Matrix <br /> Spike 51 52 53 85 088 <br /> Matrix Spike <br /> % Recovery 100 100 110 110 90 <br /> Cone Matrix <br /> Spike Dup 51 52 53 84 088 <br /> Matrix Spike <br /> Duplicate <br /> % Recovery 100 100 110 100 90 <br /> Relative <br /> % Difference 00 00 00 1 2 00 <br /> SEQUOIA ANALYTICAL 96 Recovery Conc of M S -Conc of Sample x 100 <br /> Spike Conc Added <br /> Relative%Difference Conc of M S -Cone of MSD x 100 <br /> Michael R Giles (Conc of M S + Conc of M S D)/2 <br /> Laboratory Director 1110745 RES <8> <br />