17.8.1806 GENERAL OPERATING REQUIREMENTS
(1) Registration of a facility under this subchapter does not relieve an owner or operator of the responsibility to comply with:
(a) applicable federal, state, or local statutes, rules, or orders; and
(b) control strategies contained in the Montana State Implementation Plan.
(3) An owner or operator of a facility required to be registered under this subchapter:
(a) shall install, operate, and maintain all equipment to provide the maximum air pollution control for which it was designed;
(b) shall employ dust suppression control that is installed, maintained, and operated to ensure that the facility complies with this chapter. Dust suppression control for crushing, screening, and/or conveyor transfer points consisting of water spray bars and/or chemical dust suppression must be operating if any visible emissions equal to or greater than 10 percent opacity averaged over six consecutive minutes are present;
(c) shall allow the department's representatives access to the operations at any facility at all reasonable times to inspect or conduct surveys, collect samples, obtain data, audit any monitoring equipment or observe any monitoring or testing, and otherwise conduct all necessary functions related to the administration of this chapter; and
(d) may not operate an engine that is subject to the requirements of this subchapter at any permanent location when the combined horsepower hours of those sources exceed the following limits:
(i) 6,000,000 horsepower-hours per rolling 12-month period; or
(ii) 3,500,000 horsepower-hours per rolling 12-month period, if an asphalt plant is also located at the permanent location.