9 CFR 590.506 - Candling and transfer-room facilities and equipment.
(a) The room shall be so constructed that it can be adequately darkened to assure accuracy in removal of inedible or loss eggs by candling. Equipment shall be arranged so as to facilitate cleaning and the removal of refuse and excess packing material.
(b) The construction of the floor shall allow thorough cleaning. The floors shall be of water-resistant composition and provided with proper drainage.
(c) An approved exhaust system shall be provided for the continuous removal directly to the outside of any steam, vapors, odors, or dust in the room. The room shall be maintained at reasonable working temperatures during operations.
(d) Candling devices of an approved type shall be provided to enable candlers to detect loss, inedible, dirty eggs, and eggs other than chicken eggs.
(e) Leaker trays shall be made of a material and of such design that is conducive to easy cleaning and sanitizing.
(f) Containers made of a material and of such design that are conducive to easy cleaning shall be provided for inedible eggs. All such containers shall be conspicuously marked.
(g) Containers made of a material and of such design that are conducive to easy cleaning shall be provided for trash unless clean, disposable containers are furnished daily.
(h) Shell egg conveyors shall be constructed so that they can be thoroughly cleaned.