29 samples were analyzed for tungsten using Colorimetric methods after carbonate sintering and for mercury using Cold Vapor Atomic Absorption after HCl:HNO3 (3:1) acid digestion. 169 samples were analyzed for arsenic using Colorimetric methods after nitric perchloric acid digestion. The results published in AOF164 and 165 have numerous mistakes. The results listed here have been corrected using the original geochemical reports.