NAC445A.579. Flying insects.

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1. The operator shall protect all openings in the plant to the outer air against the entrance of flying insects. The operator shall use self-closing doors, closed windows, screening, controlled air currents or other effective means.

2. Any screening used must be not less than 16-mesh or its equivalent. Screen doors to the outer air must be self-closing. Screens for windows, doors, skylights, transoms and any other openings to the outer air must fit tightly and be free of breaks.

(Added to NAC by Bd. of Health, eff. 10-14-82)—(Substituted in revision for NAC 445.340)

                    
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