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1 <br />BARRING~R LA.BORATORZb'S, INC. 26-Apr-99 <br />Page: Q-2 <br />' 15000 W.6TH AVE., SUITE 300 GOLDEN, CO 80401 (303) 277-1687 FAX (303) 277-1609 Job : 9 918 21 E <br />Status: Final <br />Banks and Gesso LLC <br />' QUALITY CONTROL REPORT <br /> Nickel Potassium Silicon Silver Sodium <br />' Total Total Total Total Total <br /> Sample Id mg/1 mg/1 mg/1 mg/1 mg/1 <br /> Blank U U U U U <br /> LCS (True) 5.00 20.0 2.00 1.00 20.0 <br />' LCS (Found) 4.99 18.8 2.02 0.94 20.2 <br /> LCS % Rec 99.8 94.2 101 94.1 101 <br /> Duplicate U 21 0.9 U 231 <br />' Duplicate U 21 0.9 U 234 <br /> RPD NC (4) (4) NC 1.1 <br />' Spike % Rec 97.1 NA 81.5 93.9 NA <br />t <br /> Strontium Titanium Vanadium Zinc Arsenic <br /> Total Total Total Total Total <br /> Sample Id mg/1 mg/1 mg/1 mg/1 mq/1 <br />t Blank U U U U U <br /> LCS (True) 1.00 1.00 5.00 1.00 0.050 <br /> LCS (Found) 0.96 0.97 4.84 0.95 0.051 <br /> LCS % Rec 95.6 97.2 96.8 95.3 101 <br /> Duplicate 0.207 U 0.08 U U <br /> Duplicate 0.209 U 0.08 U U <br />' RPD 0.9 NC 1.8 NC NC <br />' Spike °s Rec 100 101 95.1 96.6 98.5 <br /> Antimony Selenium Thallium Mercury Fluoride <br />' Total Total Total Total <br /> Sample Id mg/1 mg/1 mg/1 mg/1 mg/1 <br /> Blank U U U U U <br />' LCS (True) 0.050 0.050 0.050 0.0050 10.0 <br /> LCS (Found) 0.052 0.054 0.051 0.0051 9.65 <br /> LCS % Rec 105 107 102 102 96.5 <br /> Duplicate U U U U 2.58 <br />' Duplicate U U U U 2.56 <br /> RPD NC NC NC NC 0.8 <br />' Spike % Rec All9 125 93.6 121 103 <br /> <br />1 <br /> <br />' Meeting The Analytical Challenges Of A Cha~lging World Since 1961 <br />