Pennsylvania Statutes Title 52 P.S. Mines and Mining § 690-403. Exhaust emissions control

(1) Except as provided in paragraph (3), underground diesel-powered equipment shall include an exhaust emissions control and conditioning system that has been laboratory tested with the diesel engine using the ISO 8178-1 test and has resulted in diesel particulate matter emissions that do not exceed an average concentration of 0.12 mg/m3 when diluted by 100% of the MSHA Part 7 approval plate ventilation rate for that diesel engine. If MSHA promulgates new regulations that change the MSHA Part 7 approval plate ventilation rate, the dilution percentage relative to the approval plate ventilation rate shall be adjusted either up or down on a direct ratio basis upon recommendation of the technical advisory committee in accordance with section 424. 1

(2) Except as provided in paragraph (3), the exhaust emissions control and conditioning system shall be required to successfully complete a single series of laboratory tests for each diesel engine, conducted at a laboratory accepted by the department.

(3) An exhaust emissions control and conditioning system may be approved for multiple diesel engine applications through a single series of laboratory tests, known as the ISO 8178-1 test, only if data is provided to the technical advisory committee that reliably verifies that the exhaust emissions control and conditioning system meets, for each diesel engine, the in-laboratory diesel particulate matter standard established by this subsection. Data provided to satisfy this paragraph shall include diesel particulate matter production rates for the specified engine as measured during the ISO 8178-1 test, if available. If ISO 8178-1 test data for diesel particulate matter production is not available for a specified engine, comparable data may be provided to the technical advisory committee that reliably verifies that the exhaust emissions control and conditioning system shall meet, for the specified diesel engine, the in-laboratory diesel particulate matter standard established by this subsection. This standard shall only be used for in-laboratory testing for approval of diesel-powered equipment for use underground.

(1) A diesel particulate matter (DPM) filter that has proven capable of a reduction in total diesel particulate matter to a level that does not exceed the requirements of subsection (a)(1). However, the technical advisory committee may evaluate, in accordance with section 424, alternative technologies that have the ability to meet the 0.12 mg/m3 standard.

(2) An oxidation catalyst or other gaseous emissions control device capable of reducing undiluted carbon monoxide emissions to 100 parts per million or less under all conditions of operation at normal engine operating temperature range.

(3) An engine surface temperature control capable of maintaining significant external surface temperatures below 302 degrees Fahrenheit.

(4) A system capable of reducing the exhaust gas temperature below 302 degrees Fahrenheit.

(5) An automatic engine shutdown system that shuts off the engine before the exhaust gas temperature reaches 302 degrees Fahrenheit and, if water-jacketed components are used, before the engine coolant temperature reaches 212 degrees Fahrenheit. A warning shall be provided to alert the equipment operator prior to engine shutdown.

(6) A spark arrestor system.

(7) A flame arrestor system.

(8) A sampling port for measurement of undiluted and untreated exhaust gases as they leave the engine.

(9) A sampling port for measurement of treated undiluted exhaust gases before they enter the mine atmosphere.

(10) For permissible diesel equipment, any additional MSHA regulations must be met.

(1) Engine speed.

(2) Operating hour meter.

(3) Total intake restriction.

(4) Total exhaust back pressure.

(5) Cooled exhaust gas temperature.

(6) Coolant temperature.

(7) Engine oil pressure.

(8) Engine oil temperature.