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Concrete Plants

Concrete batch plants, concrete block production facilities, and pug mills may be eligible for the industry specific General Construction Permit and the General State or General Conditional Major Operating Permits if the only sources of emissions, besides exempt equipment, are:

  • sand and aggregate storage;
  • sand and aggregate transfer to elevated bin;
  • cement and/or cement supplement loading;
  • weigh hopper loading;
  • truck loading, central mixer loading, and/or pug mixer loading;
  • loading, transfer or storage associated with emission control systems;
  • boilers and/or other fuel combustion devices less than 30 million BTU per hour;
  • temporary/portable crushing and screening equipment for nonmetallic minerals processing

See an interactive map of concrete plants.

What are the emission thresholds for coverage under the General State Operating Permit for Concrete Plants?

To qualify for coverage under the General State Operating Permit for Concrete Plants, potential uncontrolled emissions must be below major source thresholds (for concrete plants, two major pollutants of concern are PM and PM10, the thresholds are: PM less than 250 tons/year and PM10 less than 100 tons/year). In general, plants rated less than the following capacities (using the manufacturer's maximum rated plant capacity) qualify for coverage under this permit:

  • Truck Mix = 164 yd3/hr
  • Central Mix = 294 yd3/hr
  • Pugmill = 308 yd3/hr

If your plant exceeds these thresholds, please contact the BAQ for assistance in determining your permitting status.

General Construction Permit

A construction permit is an air permit required for a facility that plans to construct, alter, or add to a source of air pollution including the installation of an air pollution control device. For concrete plants, to request coverage under the General Construction Permit for Concrete Plants complete and submit Form D-2068. Once the application has been reviewed and approval of the construction permit is issued, on-site activities may commence.  Click on the link below for a copy of the General Construction Permit for Concrete Plants:

Note: This copy of the permit is provided for use by facilities that have already been granted coverage by the Bureau. Download and the use of these permits does not constitute coverage.
Note: If the operations covered by construction permits are located in one of the eight coastal counties of the Coastal Zone under DHEC-OCRM's jurisdiction (Beaufort, Berkeley, Charleston, Colleton, Dorchester, Georgetown, Horry and Jasper), then a coastal zone consistency certification may be required.

General Operating Permits

Any source that is required to obtain an air quality construction permit issued by the BAQ must obtain an operating permit when the new or altered source is placed into operation. The BAQ requires certification that the construction covered by the application has been completed in accordance with the conditions in the construction permit issued. For concrete plants requesting coverage under either one of the General Operating Permits for Concrete Plants, complete and submit Form D-2068.  Click on the links below for a copy of the General Operating Permit for Concrete Plants:

Note: These copies of the permits are provided for use by facilities that have already been granted coverage by the Bureau. Download and the use of these permits does not constitute coverage.

What Are My Recordkeeping Requirements?

The following records, as applicable, must be maintained on site, in written or electronic logs, for at least five (5) years. Each facility covered under the General Permitting Program for Concrete Plants should refer to its permit for detailed recordkeeping requirements.
Please note:

    • Plants with fuel burning sources may be subject to additional recordkeeping requirements.
    • Plants covered under the General Conditional Major Operating Permit for Concrete Plants have reporting requirements in addition to the recordkeeping requirements outlined below.

 

What must I record?

How often should I record?

Concrete Production in cubic yards

Daily

Truck and/or mixer load-out inspections

Weekly

Bag/cartridge filter maintenance

As bags/cartridges are replaced

System pressure drop measurements

Daily

Visual inspection of silo control devices

Daily facility inspection or when the silo is loaded, whichever is lesser

What Must I Do if I Want to Relocate My Plant?

  • Notify the Department within 30 days of relocation,
    • if relocating the plant to another site in South Carolina that is not co-located with another facility; or
    • if relocating the plant to a storage site; or
    • if moving your plant out of state
  • Request Department approval prior to moving your plant to another site in SC that is co-located with another facility.

Click on the link below for relocation application:

Emissions / Reporting Tools

Guidance

For more information please contact:

Phyllis Copeland - 803-898-0415