Technical Booklet B Materials and Workmanship·Page 15·2.14
Resistance to substances in the subsoil
Materials in contact with the ground or in foundations must be capable of resisting attacks by deleterious materials in the subsoil such as sulfates.
Any material in contact with the ground or in the foundations will be suitable if it is capable of resisting attacks by deleterious material in the subsoil such as sulfates.
Source — /Users/richardhill/Documents/planning-arch-project/data/documents/regional/Technical Booklet B - Materials and Workmanship.pdf