Environmental
A Nebraska home inspector notices white chalky staining on the basement walls. This most likely indicates:
AAsbestos contamination
BRadon gas infiltration
CEfflorescence from moisture intrusion✓ Correct
DLead paint deterioration
Explanation
Efflorescence is the white chalky deposit left when water moves through concrete or masonry and evaporates, leaving mineral salts. It indicates moisture intrusion through the foundation walls.
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