Dunno about this White Mold. Adam, Jan and Lew donned Surgical Masks and dealt with it. Please Pass the Wrecking Bar.
This is [was] a Douglas Fir 2X8. Doug Fir is [usually] resistant to Rot. Hmm, that amount of Decay didn't happen in just one damp Summer, Eh? Using a Basement as living space in Pennsylvania isn't practical in the Long Term.
The "Root Cellar/Darkroom" cleaned out. The way a basement should be. Empty. Two Clorox applications. No Mold. 'Nuff Said.On to the Next Problem....
Again, not acceptable. This Heat Exchanger was exchanging more Stack Gas than Heat. This Furnace needed replaced 10Yrs ago.