West Virginia Code of State Rules › Agency 196 - Diesel Equipment Commission › Title 196 - LEGISLATIVE RULE DIESEL EQUIPMENT COMMISSION › Series 196-01 - Rules For Operating Diesel Equipment In Underground Mines In WV › Section 196-1-7 - Exhaust Gas Monitoring and Control

Current through Register Vol. XLI, No. 28, July 12, 2024
7.1.
				In monitoring and controlling exhaust gases, the ambient concentration of
				exhaust gases in the mine atmosphere shall not exceed 35 ppm ceiling for carbon
				monoxide (CO), 25 ppm ceiling for nitric oxide (NO) and 3 ppm ceiling for
				nitrogen dioxide (NO2). The concentration of these exhaust gases shall be
				measured at the equipment operator's or equipment attendant's position and inby
				the last piece of diesel-powered equipment operating in the same split of air.
				Measurements shall be made weekly or more often if necessary by a qualified
				person and shall be conducted pursuant to the requirements of this
				section.
7.2. Measurement of
				exhaust gases shall be made with a sampling instrument no less precise than
				detector tubes.
7.3. If the
				concentration of any of the gases listed in subsection 7.1 is seventy-five
				percent or more of its exposure limit, changes to the use of the diesel
				equipment, the mine ventilation or other modifications to the mining process
				shall be made.
7.4. If the
				concentration of any of the gases listed in subsection 7.1 exceeds the exposure
				limit, the diesel equipment operating in that split shall be removed from
				service immediately and corrective action taken. After corrective action has
				been taken by the mine operator, the diesel equipment may be returned to
				service in its regular operating mode for emissions testing purposes only, and
				emissions testing shall be conducted immediately to assure that the
				concentration does not exceed seventy-five per cent of the exposure limit.
				Corrective action must be taken until the concentration does not exceed
				seventy-five percent of the exposure limit before the diesel equipment can be
				returned to full operation.
7.5. In
				addition to the other maintenance requirements set forth in this article, the
				mine operator shall comply with the following requirements:
7.5.a. Repair or adjustment of the fuel
				injection system shall only be performed by qualified mechanics authorized by
				the engine manufacturer.
7.5.b.
				Complete testing of the emissions system in accordance with §
										196-1-20 shall
				be conducted prior to any piece of diesel-powered equipment being put into
				service, after any repair or adjustment to the fuel delivery system, engine
				timing or exhaust emissions control and conditioning system.
7.5.c. Service and maintenance of the intake
				air filter exhaust particulate filter and the exhaust system shall be performed
				at specific time intervals based on the component manufacturer's
				recommendation, compliance with the engine or emissions control operation
				specifications and, as needed, based on the on-board diagnostics and/or
				emissions test results. Accurate records shall be maintained of all such
				service and maintenance.