Request for air quality permit coverage for stone quarrying, crushing, and screening operations at Seubert Excavators, Inc.'s Plant #3 facilities
Seubert Excavators, Inc.'s Plant #3 on the Nez Perce Reservation now operates under the SQCS General Air Quality Permit for Stone Quarrying, Crushing, and Screening Facilities in Indian Country, which has been approved by EPA Region 10. This permit sets specific emission standards and regulatory requirements to control air pollutants generated by the operations.
The permit covers stone quarrying, crushing, and screening activities at Plant #3 on Indian Country lands, including equipment such as crushers, screens, conveyors, and associated material handling devices.
To limit emissions of particulate matter, especially PM10 and PM2.5 fractions, the facility must adhere to standards provided in the permit. Opacity limits of visible emissions during normal operations are not to exceed 20%, and particulate emissions are subject to mass-based limits or emission factor-based restrictions based on equipment capacity and material throughput.
Control measures include the use of water sprays, fogging systems, or fabric filters to suppress dust during crushing, screening, and material handling. Paved or treated haul roads and stockpiles are also required to minimize fugitive dust emissions, as well as operational work practices to reduce dust generation (e.g., minimizing drop heights and speed limits).
Regular monitoring, recordkeeping, and reporting are specified in the permit. Operational and emissions data must be documented, and periodic reports demonstrating compliance with permit requirements must be submitted to EPA Region 10.
The permit incorporates requirements from the Clean Air Act relevant to minor sources in Indian Country and ensures compliance with National Ambient Air Quality Standards for particulate matter. EPA Region 10's oversight for Indian Country ensures adherence to both federal regulations and region-specific requirements.
To find the full details of the permit, visit EPA Region 10's Air Quality division website or Indian Country air program pages. The permit document includes detailed emission limits (usually found in sections titled “Emission Limitations” or “Conditions”). For Plant-specific conditions, look for Appendices or Attachments referencing Seubert Excavators, Inc., Plant #3.
In addition to Plant #3, the EPA has also approved requests for coverage under the SQCS General Permit for Seubert Excavators, Inc.'s Plants #1 and #2. The technical support document provides information supporting EPA's approval of coverage for Plant #3, and the documents for all three plants provide general permit information.
The EPA's approval was given for eight different locations on the Nez Perce Reservation for Seubert Excavators, Inc.'s operations under the SQCS General Permit. The document is related to this approval and contains information about the conditions and requirements for Plant #3.
- The permit, approved by EPA Region 10, not only covers Stone Quarrying, Crushing, and Screening activities at Seubert Excavators' Plant #3, but also extends to Plants #1 and #2 on the Nez Perce Reservation.
- The permit, in line with the Clean Air Act and National Ambient Air Quality Standards for particulate matter, requires the facility to implement control measures like water sprays, fogging systems, and fabric filters to minimize emissions during operations.
- To ensure environmental sustainability, the permit also stipulates that the facility must comply with specific emission standards, particularly for particulate matter like PM10 and PM2.5, and follow practices that promote resource management in the industry, such as maintaining regular monitoring, recordkeeping, and reporting.
