PART XXIX UNDERGROUND OPERATIONS — Booster fan
585
An employer shall ensure that a booster fan
585(a)
does not restrict the free passage of air delivered by a main fan in the event the booster fan stops;
585(b)
stops in the event a main fan stops; and
585(c)
is continuously monitored by a system that alarms at a permanently attended monitoring station in the event the fan stops or its performance falls below an established efficiency level.
Not legal advice. Verify the cited article against the signed agreement.