Hydrogeochemistry is widely used in exploration for geothermal resources. While the authors report that some studies have shown the method can identify commodity and pathfinder element patterns related to outcropping and unexposed mineralized rock, the technique has not been widely used in mineral exploration. Geoscience BC Report 2015-17 describes a "proof of concept" study carried out around the Poison Mountain copper-gold prospect in central BC. The study tested the effectiveness of the Palintest Photometer 8000 by comparing field measured results with those of laboratory results, for each site. The results were also compared with the results from conventional stream sediment geochemistry. Sampling included the testing of 70 water samples with the photometer, the collection and laboratory analysis of 40 water samples, and the collection and laboratory analysis of 66 stream sediment samples.