I read about that site a little while ago! The datacenter is in Tennessee: https://maps.app.goo.gl/shpHnsqrQkz8g4cWA. And the power generation is one mile south, over the state border in Mississippi: https://maps.app.goo.gl/wR1e4YkqrhVcUJTi6. They built the datacenter (Colossus-2) in the building of a previous warehouse and the power plant on the site of a previous gas plant. Apparently they rent the gas turbines, that’s how they got them in place so quickly.
They are doing the same shitty trick as with Colossus-1 again, “those turbines are totally temporary and mobile, so we don’t need permits for a year”. MDEQ has confirmed for a while that there were 46 unpermitted turbines..
The real news in the Reuters report the Tomshardware article is based on, is that they got model numbers, and did the calculations for an estimate of the pollution. It's quite extreme, the size of those bars versus the line that displays the usual environmental limits.