Mold first noticed in mid March 2021.
NE Corner after removal of sheetrock:
North wall near NE corner:
IR Image of North Wall / NE Corner / part of East Wall (13 March 2021):
CO2 levels continue to be extremely high (1500 to 7000 ppm) and erratic (significant changes hour to hour) which is presumably an indication of continued active mold growth.
The only other source of such high CO2 that I can think of is organic matter in the soil but the backfill was sand/silt so there should not be any significant organic matter breaking down. CO2 levels elsewhere in the house generally remain below 550-600 ppm even with humans present.
CO2 levels continue to be high and erratic even when humidity in the room is kept below 25% with a dehumidifier.
Some photos during the build to give an idea of how it was constructed / insulated / waterproofed. The wine room is under what will be the front portico.
Aerial image facing west:
The drainage mat was removed to ground level and the upper part including the cap is waterproofed:
Waterproofing is complete. Old drainage mat was reattached with mechanical fasteners but no mastic or similar material. There is a gap between the top of the original drainage mat and the re-applied drainage mat. Work continues on house.
Some drainage mat on east face has come off and it appears that the top part on south face is damaged.