(1) Liquid manure storage tanks shall be constructed of steel, reinforced concrete or prestressed concrete.
(2) Liquid manure storage tank walls, bases and appurtenances, including piping for the conveyance of liquid manure and associated connections and joints, shall be designed and constructed to prevent leakage of contents.
(3) Concrete for liquid manure storage tanks shall,
(a) be made from HS or HSb cement,
(b) have a 28-day strength of at least 32 MPa, and
(c) have a water/cement materials ratio of not more than 0.45.
(4) Liquid manure storage tanks shall be placed on undisturbed soil free of any organic, deleterious and extraneous materials and capable of supporting the superimposed design loads from the tanks.
(5) Where granular fills are used between the bases of liquid manure storage tanks and the undisturbed soil, the granular fills shall be compacted to a Standard Proctor density of not less than 95%.