Diesel Particulate Matter DPM Compliance South Central District Dallas, Texas (214) 767-8401 Disclaimer Although we have endeavored to accurately reflect the position of the Department, the positions presented in the following slides do not constitute the official position of the Department except when a statutes or regulation is quoted. It is solely intended to be an aid in addressing the situations discussed.

CFR standards for DPM compliance; 57 CFR standards for DPM compliance; 57.5060- Limit on exposure to diesel particulate matter. 57.5065- Fueling practices. 57.5066- Maintenance standards. 57.5067- Engines. 57.5070- Miner training 57.5071- Exposure monitoring. 57.5075- Diesel particulate records

57.5060 (3) Effective May 20, 2008, a miner’s personal exposure to diesel particulate matter (DPM) in an underground mine must not exceed an average eight-hour equivalent full shift airborne concentration of 160 micrograms of total carbon per cubic meter of air (160TC μg/ m3).

57.5060 (d) The mine operator must install, use, and maintain feasible engineering and administrative controls to reduce a miner’s exposure to or below the applicable DPM PEL established in this section.

57.5065 Fuels Diesel fuel used to power equipment in underground areas must not have a sulfur content greater than 0.05 percent. Note; a purchase record must be kept for one year after the purchase date, to prove compliance with this standard.

57.5066 Maintenance (a) Any diesel powered equipment operated at any time in underground areas must meet the following maintenance standards: (1) The operator must maintain any approved engine in approved condition; (2) The operator must maintain the emission related components of any non-approved engine to manufacturer specifications; and (3) The operator must maintain any emission or particulate control device installed on the equipment in effective operating condition.

57.5066(b)(1) A mine operator must authorize each miner operating diesel-powered equipment underground to affix a visible and dated tag to the equipment when the miner notes evidence that the equipment may require maintenance in order to comply with the maintenance standards of paragraph (a) of this section. Task training is required to accomplish this if the equipment operator does note have mechanical skills as outlined in subsection (c)

57.5066 (3) A mine operator must retain a log of any equipment tagged pursuant to this section. The log must include the date the equipment is tagged, the date the equipment is examined, the name of the person examining the equipment, and any action taken as a result of the examination. The operator must retain the information in the log for one year after the date.

57.5070 Miner Training Mine operators must provide annual training to all miners at a mine covered by this part who can reasonably be expected to be exposed to diesel emissions on that property.

57.5071 Exposure monitoring Mine operators must monitor as often as necessary to effectively determine, under conditions that can be reasonably anticipated in the mine, whether the average personal full-shift airborne exposure to DPM exceeds the DPM limit specified in § 57.5060.

The results of monitoring for diesel particulate matter, including any results received by a mine operator from sampling performed by the Secretary, must be posted on the mine bulletin board within 15 days of receipt and must remain posted for 30 days. The operator must provide a copy of the results to the authorized representative of miners.

The mine operator should place fans and tubing in a manner to minimize recirculation of airflow and improve the quality of air directed to the face. Direct standards 57.5060(d), and 57.8529

Mine operators should provide minimally contaminated airflow to the inlet of the fans ventilating the working place. this includes scheduling work in areas such that exhaust air from an active working place is not used to ventilate another active work area. Direct standards 57.5060(d) and 57.8529

Maintenance and repair Ventilation tubing and ventilation fans should be maintained and regularly inspected to ensure it provides optimum air volume.

Increase quantity and velocity to the face by keeping the tubing discharge in closer proximity to the face. Direct standards 57.5060(d), and 57.8529

Direct standards 57.5060(d),8529 Reducing resistance and maximizing airflow in the ventilation tubing by eliminating sharp bends, fixing holes and other leaks, and tightening connections.

noxious gases at the face Build up of DPM and noxious gases at the face Example: Fan locations are critical and should not be located inside the drift being ventilated or on the down cast side of the main drift the fresh air is being pulled out. This is to prevent recirculation of exhaust or contaminated air. DPM GAS Short Circuiting Symbol Legend - Clean Air Flow - Mixed Air - Auxiliary Fan - Vent Tubing Recirculation Direction of Main Airflow

Symbol Legend Example: Proper fan placement to prevent recirculation of exhaust or contaminated air. Symbol Legend - Clean Air Flow - Exhaust Air - Auxiliary Fan - Vent Tubing Direction of Main Airflow

Provide work crews with sufficient gas and airflow monitoring equipment to evaluate their work atmosphere. Reference standards 57.5060(d), 5071, and 57.8529

Direct standards 57.5060(d), .5066, .5067, 5002 Indirect 57.5005, and .8529 Initiate an emissions-based preventive maintenance program for all of the mobile underground equipment. This program should include periodic scheduled tailpipe exhaust emission measurements.

Consider equipping or retrofitting mobile equipment cabs (i. e Consider equipping or retrofitting mobile equipment cabs (i.e. drills, mechanical scalars, trucks, and front end loaders) with high efficiency air filtering systems capable of maintaining a constant supply of clean air to the miners operating the equipment. Direct 57.5060(d), indirect 57.5070 and .5071

Seal openings in the mobile equipment operator cabs, such as installing and replacing gaskets around doors, windows, and other holes, to provide a barrier to prevent contaminated outside air from entering the cab. The fan forcing the filtered air into the cab should create a positive pressure inside the cab when the cab is sufficiently sealed. Reference standard 57.5060(d), indirectly 5070 and .5071

Direct standards 57.5060(d), 57.8529 Indirectly 5070, 5071 Use properly placed ventilation controls to increase the efficiency of the ventilation system, reducing air contamination going to the working areas, and increasing the effectiveness in removing DPM and harmful gases.

Operators should consider developing and following a plan to replace older diesel engines with newer, lower-emission diesel engines. Reference standards 57.5060, .5066, .5067 and 5071 Installing diesel particulate filters (DPF) on equipment where possible, such as locomotives, haul trucks, and loaders. Reference standard 57.5060(d) Diluting exhaust emissions from machines that have the potential to expose the operator or the machine intake system to exhaust emissions. Reference standards 57.5060

57.5075(a)—DIESEL PARTICULATE RECORDKEEPING REQUIREMENTS 1. Approved application for extension of time to comply with exposure limits, 57.5060(c) Duration of extension. 2. Identity of PLHCP and most recent written determination of miner’s ability to wear a respirator. 57.5060(d) Duration of miner’s employment plus 6 months. 3. Purchase records noting sulfur content of diesel fuel. 57.5065(a) 1 year beyond date of purchase. 4. Maintenance log . 57.5066(b) 1 year after date any equipment is tagged. 5. Evidence of competence to perform maintenance 57.5066(c) 1 year after date maintenance performed. 6. Annual training provided to potentially exposed miners. 57.5070(b) 1 year beyond date training completed. 7. Record of corrective action . 57.5071(c) Until the corrective action is completed. 8. Sampling method used to effectively evaluate a miner’s personal exposure, and sample results. 57.5071(d) 5 years from sample date.

In conclusion mine operators should develop a long range DPM strategic compliance strategy with milestones that ensure compliance through sampling and air monitoring. Overexposure to DPM is most effectively reduced by a combination of feasible controls, such as adequate ventilation, implementing clean-burning engines, proper engine maintenance, the addition of DPFs, the use of biodiesel fuel, implementing work practices, and the addition of enclosed pressurized cabs with filtered air.

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