3717-1-06.4(D) Physical facilities: maintenance and operation

Cleaning ventilation systems, nuisance, and discharge.

(1)

Intake and exhaust air ducts are to be cleaned and filters changed so they are not a source of contamination by dust, dirt, and other materials.

(2)

If vented to the outside, ventilation systems are not to create a public health hazard or nuisance or unlawful discharge.