30 CFR PART 72 DIESEL PARTICULATE MATTER Sections …72.520

Diesel Particulate Matter Underground Areas of Underground Coal Mines Promulgated January 19, 2001 (DPM)

Purpose Establish new health standards on DPM in underground coal mines. –Reduce risks to underground coal miners of serious health hazards associated with exposure to DPM.

Outline Definition of the term “Introduced” Emission Limits: Permissible Equipment Emission Limits: Nonpermissible Heavy Duty Equipment, Generators, and Compressors Emission Limits: Nonpermissible Light Duty Equipment Determining Engine Emissions/ Filter Maintenance and Testing Procedures Health Training

Outline Diesel Equipment Inventory Summary

Introduced (e) Equipment whose engine is a new addition to the underground inventory of the mine Including: –Newly purchased equipment –Used equipment –Equipment receiving a replacement engine with a different serial number than the engine it is replacing Not Included: –Piece of equipment whose engine was previously part of the mine inventory and rebuilt.

Emission Limits: Permissible Equipment Section Each piece introduced into the mine must emit no more than 2.5 grams per hour of DPM Effective Date:After May 21, 2001 Each piece within the mine must emit no more than 2.5 grams per hour of DPM Effective Date:As of July 19, 2002

Each piece introduced into the mine must emit no more than 5.0 grams per hour of DPM Effective date:After May 21, 2001 Each piece within the mine must emit no more than 5.0 grams per hour of DPM Effective date:As of July 21, 2003 Emission Limits: Nonpermissible Heavy Duty Equipment, Generators, and Compressors Section

Each piece within the mine must emit no more than 2.5 grams per hour of DPM Effective date: As of January 19, 2005

Emission Limits: Nonpermissible Heavy Duty Equipment, Generators, and Compressors Section Exceptions: Generator or Compressor: Exhaust discharged directly into the return or into intake air coursed directly to a return is not subject to the applicable requirement of this section. A combination machine such as a rock duster with a built in diesel-powered compressor or a diesel-powered welder would not be considered to be included in section

Emission Limits: Nonpermissible Light Duty Equipment Section Each piece introduced into the mine must emit no more than 5.0 grams per hour of DPM Effective date:After May 21, 2001 Exemptions –Engines that meet or exceed EPA DPM emission requirements –Ambulances or fire fighting equipment used in accordance with the mine’s fire fighting and evacuation plan under

Compliance Determination Permissible Equipment 2.5 gm/hr For permissible machines, the baseline DPM emissions from a Category A diesel engine are multiplied by a filter efficiency to determine compliance. Reducing the horsepower rating of an approved engine in order to reduce the emissions will require the engine to be retested at this reduced horsepower.

MSHA Approved Diesel Engines / Filter Efficiency Engines For Permissible Machines

Compliance Determination Example Caterpillar 3306PCNA diesel engine produces gm/hr of DPM emission based on engine approval data. A paper filter has a DPM efficiency removal of 95% gm/hr X 0.05 = 2.29 gm/hr

Compliance Determination Example MWM diesel engine produces gm/hr of DPM emission based on MSHA engine approval data. An equivalent paper filter is given a DPM efficiency removal of 95% gm/hr X 0.05 = 1.27 gm/hr

Meeting this Requirement Some permissible machines already have filters installed with correct filter efficiency - No additional work to meet standard Some permissible machines have approved filter kit options available - Add kit to machine to meet standard Some permissible machines do not have kits available as an option: –Equipment manufacturer can add under an extension to the approval. –Mine operator may apply under field modification

Meeting this Requirement If the filter is equivalent to a Donaldson filter, Part No. EN , then no additional filter efficiency test is needed. If the filter is not equivalent then –a filter efficiency test is required, plus –meet other established filter criteria such as flammability, off-gassing, etc. All approval evaluations will address permissibility issues: –Cannot adversely affect machine safety features such as exhaust cooling, explosion proofing, exhaust backpressure.

Meeting this Requirement MSHA estimates that approximately 47 permissible machines have filters installed. MSHA estimates that out of the 481 permissible machines, 222 machines have filter kits available. Current filter usage on permissible machines indicates that a disposable filter media can last approximately shifts. Mine operator will list the filter used on the diesel equipment inventory.

5.0 gm/hr and 2.5 gm/hr Nonpermissible Machine DPM Limits Heavy Duty Machines, Generators, and Compressors These machines normally do not control for exhaust gas temperature, thus precluding the use of paper filters. Hot gas filters (ceramic) or other aftertreatment devices can be used to comply. Allows mine operators a choice in purchasing aftertreatment devices based on expected life of the machine.

MSHA Approved Diesel Engines / Filter Efficiency Example of Engines Used in Nonpermissible Heavy Duty Machines, Generators, and Compressors

Compliance Determination Example Deutz F6L912Wdiesel engine produces 8.50 gm/hr of DPM emission based on MSHA engine approval data A filter efficiency of 42% is needed to meet the 5.0 gm/hr 8.50 gm/hr X 0.58 = 4.93 gm/hr A filter efficiency of 71% is needed to meet the 2.5 gm/hr standard 8.50 gm/hr X 0.29 = 2.46 gm/hr

Meeting this Requirement Mine operators will most likely install hot gas (ceramic type) filters. MSHA does not foresee additional tests unless mine operators choose aftertreatment devices that are not “off the shelf”. Aftertreatment device vendors and other organizations perform filter evaluation tests.

VERT Organization VERT tests and evaluates DPM filters. VERT publishes a list of DPM filters that meet VERT’s criteria. MSHA accepts the VERT filter efficiency data. Contact MSHA if there are questions concerning the VERT data.

Additional Compliance Information The Secretary may accept other data. Any pre-treatment device(s) or additive(s) must meet the requirements of –Pre-treatment devices/additives will be evaluated the same as aftertreatment devices –Effectiveness of the pre-treatment devices supported by testing and data. If no data is available, the final rule specifies test procedure in (b). Contact MSHA or visit the MSHA homepage for information before purchasing a DPM filter to ensure the efficiency is acceptable.

Additional Compliance Information If mine operators are planning on using aftertreatment devices other than DPM filters, MSHA should be consulted. MSHA’s Office of Technical Support can assist on evaluation of data that mine operators obtain from vendors or other sources. The aftertreatment device must meet the minimum efficiency requirements for the category and application in which the piece of equipment is used.

Introduced Nonpermissible Light-Duty Equipment Equipment must emit no more than 5.0 gm/hr of DPM. Compliance will be determined in the same way as permissible and heavy-duty equipment. - OR - Mine operators can purchase equipment using diesel engines that meet or exceed the EPA DPM requirements listed in Table

MSHA Approved Diesel Engines Example of Engines that Meets the EPA Limits Specified in Table

Compliance Determination Light duty equipment requiring DPM filters list the DPM filter efficiency in the diesel equipment inventory to show compliance. Light duty equipment having engines that meet or exceed the EPA DPM requirements must show the DPM emissions in gm/bhp-hr on the diesel equipment inventory.

Miner Health Training Operator must provide annual training to all miners who can reasonably be expected to be exposed to DPM emissions. The training must include: –Health risks from DPM exposure –Methods used in the mine to control DPM –Identification of personnel responsible for maintaining controls –Actions miners must take to ensure controls operate as intended Initial miner training has to be completed by May 21, 2001.

Miner Health Training Record Retention –At mine site for one year –Elsewhere, if record is immediately accessible from mine Access must promptly be provided upon request by –MSHA –Secretary of Health and Human Services –Authorized representative of the miners

Diesel Equipment Inventory Include –number/ type/ make and model of underground diesel powered units, –serial number/ approval number/ make and model of engine, engine emission, engine horsepower rating, –make, model, serial number and efficiency of after- treatment device. Diesel equipment ordered and received by May 20 will be treated the same as equipment at the mine prior to the promulgation of the rule.

Diesel Equipment Inventory (continued) Mine Operators must –Submit to District Manager Inventory listing all diesel equipment by May 21, 2001 Revised inventory within 7 days of any change –Provide a copy of the diesel equipment inventory to the representative of the miners within 3 days of the request.

Diesel Equipment Inventory (continued) Shared specialized diesel equipment (i.e. petito mule, generator, shield hauler, etc.) –Mines within same company Recorded on each mine’s inventory Notation on inventory indicating that equipment is shared –Mines owned by different companies Equipment is treated as newly introduced at mine Inventory must be changed to reflect addition

Diesel Equipment Inventory (continued) Diesel powered rental equipment –Subject to controls if used in underground coal mine –Requires notification of inventory change.

Summary

Obtaining Compliance –Equip engines with DPM filter –Some engines will only need catalytic converters –Use engines that meet or exceed specific EPA emission limits Generator or Compressor: Exhaust discharged directly into the return or into intake air coursed directly to a return is not subject to the applicable requirement of this section. The standard applies to all diesel equipment used underground.

Summary Most mine operators can comply using off the shelf technologies and without the need for any additional tests. MSHA is available to assist mine operators with evaluation of data and other questions. MSHA will post on the homepage information on filter efficiency and other control technologies as they become available.

MSHA CONTACTS Headquarters:Division of Health –Larry Johnson(703) Technical Support: Approval & Certification Center –George Saseen(304)

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