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Local Air Permitting

Ashworth Leininger Group collaborate with our clients and the local agencies governing air quality compliance to secure pre-construction approvals for new and modified equipment.  ALG works with all the major air districts in California including South Coast AQMD, Bay Area AQMD, San Joaquin Valley APCD, and San Diego APCD, as well as with smaller California air districts.  ALG also works with the local and state-level agencies throughout Washington, Oregon, Hawaii, Texas, Louisiana, and along the east coast.

South Coast AQMD
Texas Commission on Environmental Quality
Bay Area AQMD
Louisiana DEQ
Puget Sound Clean Air Agency


  • Preparation and negotiation of complex air permits under New Source Review (NSR) and Prevention of Significant Deterioration (PSD) regulations;

  • Design and implementation of meteorological and ambient air quality monitoring programs;

  • Emission offset trading and certification;

  • Air toxics health risk assessment studies;

  • NESHAP permitting (40 CFR Parts 61 and 63)

Client Support

ALG provides a wide range of technical services to assist our clients with working through air quality compliance and permitting requirements.


  • Inspection and Maintenance Monitoring Plans;

  • Ambient air quality impact analyses, including baseline, project, increment, visibility studies;


  • Continuous Emissions Monitoring System (CEMS) design, certification, and performance/source testing;

  • MACT/NESHAP/NSPS Operating Plans;

  • Control technology studies to support the determination of appropriate control technology under NSR, regional haze, SIP, and MACT programs;

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