Any lime slaking facility used to mix quicklime with water is permitted
by rule, provided the following conditions of this section are met:
(1) the mixing vessel shall be horizontal;
(2) the mixing vessel shall use interior mechanical agitation
parallel to the bottom and agitate the water over the full length of the vessel;
(3) quicklime shall be injected into the mixing vessel
as follows:
(A) where injection is from a pneumatic transfer system, the
quicklime shall be injected at a point at least 12 inches under the surface
of the agitated water; or
(B) where injection is from a non-pneumatic conveying system
unloading at the top of the vessel, emissions from any vent on the vessel
shall be controlled by an appropriately sized wet scrubber;
(4) there shall be no visible emissions (other than
uncombined water).
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