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Environmental Consultants, Air Quality
Air Quality

Ashworth Leininger Group routinely assists major source facilities, including refineries, oil and gas operations, electrical power generating facilities, manufacturing facilities, and legal counsel on local air district, and Federal EPA Title V operating permitting and compliance requirements.

ALG is recognized as a leader in Title V permitting matters: our staff has authored papers with EPA senior staff on Title V implementation issues, provided expert testimony on Title V requirements, and prepared scores of Title V permit applications for complex source operations around the United States. Staff also serves on agency sponsored task-forces and peer review panels, and has been admitted as expert witnesses in federal and state litigation. Specific technical services are listed below:

Local Permitting and Compliance

ALG staff collaborates with our clients and equipment manufacturers to secure pre-construction approvals for new and modified equipment. Technical services include:

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

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

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

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

  • Emission offset trading and certification;

  • Air toxics health risk assessment studies;

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

  • NESHAP permitting (40 CFR Parts 61 and 63)

For more information, please contact Ev Ashworth at (805) 764-6017 or email Ev at

Air Quality Consulting Environmental Consulting

"ALG has always provided our team with sound, specific and logical guidance. This has proven beneficial in our relationship with Federal and State regulators. Their experience and knowledge has kept us in full compliance within a quickly changing industry and we are extremely confident and happy with their support."

- Terminal Manager, Fuel and Marketing Distribution

Federal Title V Permitting and Compliance

In addition to securing pre-construction approvals, ALG has extensive experience with permitting Federal Title V facilities. ALG staff helped our clients and trade associations comment on the design of the EPA and state/local operating permit programs, and have secured scores of Title V permits for major sources throughout the United States. Technical services including preparation of initial and renewal Title V applications include:

  • Calculation of emission inventories for criteria, air toxic, and GHG emissions;

  • Definition of applicable federal, state and local requirements;

  • Definition and negotiation of monitoring, recordkeeping and reporting protocols;

  • Air dispersion modeling and health risk analyses (where applicable);

  • Strategic design to optimize operating flexibility, leverage application and permit shields and alternate operating scenarios, where necessary, and negotiation of streamlined permit terms and conditions;

  • Title V implementation programs and data management software;

For  a more detailed summary of Title V air permitting services, please see the following SOQ:

For more information, please contact Bart Leininger at (805) 764-6012 or email Bart at

Emission Reduction Credit Aquisition

ALG staff have secured approvals for innovative emission offset projects for mobile (off-road, railroad, and marine sources), industrial (point sources), and area emission sources.

Our technical services include the following:

  • Engineering and emission analysis to assure proper quantification of actual emissions including:

    • Calculation and reporting of monthly/quarterly/annual emission reductions;​

    • Analysis and quantification of missing data;

    • Auditing of Continuous Emission Monitoring Systems (CEMS)

  • Ongoing support to our larger industrial clients subject to local and regional cap-and-trade programs

For more information, please contact Jayme Dryden at (805) 764-6005 or email Jayme at

Greenhouse Gas Emission Reductions

GHG Emission Reduction Programs

ALG collaborates with our clients and agency staffs to design, quantify, and implement GHG mitigation programs required to secure pre-construction approvals or CEQA certification. Here our staff leverages technical expertise and direct prior experience in identifying cost-effective and practical GHG reduction options for industrial operations. We also assist our clients and equipment engineers in the integration of GHG reduction technologies into project design, which realizes economic and thermal efficiencies and decreases overall project costs.

For  a more detailed summary of the Greenhouse Gas Emission Compliance Services, please see the following SOQ:

For more information, please contact Mike Waller at (805) 764-6003 or email Mike at

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