more info:
airquality@liesch.com
The Clean Air Act has far reaching impacts on all aspects of business operations. Future planning, process improvements and daily operations can quickly become complicated tasks. The air quality engineers and scientists at Liesch have the experience to address how the Clean Air Act impacts your business.
The Title V Air Operating Permit Program has become the backbone of all rules and regulations with which companies must comply. At Liesch, our professionals stay current with the constantly changing rules and regulations and have the expertise to assist your organization in developing permitting strategies that provide for flexibility in anticipating future regulatory changes. We have completed over 150 Air Quality projects in over 15 states.
We can assist your company with a wide variety of air quality permits. Our professionals prepare construction permit applications for new facilities and for facilities that are adding new equipment or modifying existing facility equipment. These applications include identifying process and control equipment specifications, summarizing raw material and fuel usage, developing emission estimates, comparing emissions to limitations, and developing a proposal to monitor and record compliance. Our staff works closely with regulatory agencies to ensure the permit is issued in a timely manner and to prevent unexpected requirements in the final permit.
In addition to construction permit applications, we prepare operating permit applications, including Title V permit applications required under the 1990 Clean Air Act. We also amend, revise, and refine permit applications already on file to incorporate changes and to more accurately portray equipment capabilities and associated emissions. We also prepare New Source Review (NSR) permit applications for major sources, which may involve additional requirements including the Best Available Control Technology (BACT) analysis, Lowest Achievable Emissions Rate (LAER) review, and dispersion modeling studies.
As part of the permitting process, we may need to calculate the Potential to Emit (PTE). A walk through of the facility may be required to identify emission sources. The maximum capacity of the processes and the best method to calculate the PTE is then identified. After the PTE has been calculated, it is compared to the permitting threshold to determine if a permit is needed. Once the emissions have been calculated, we identify all applicable regulations and determine if and how they apply to the facility. We then work with the facility to find the best method for regulation compliance.
DISPERSION MODELING
Atmospheric dispersion modeling is performed to determine pollutant concentrations. At Liesch, we conduct modeling using both screening and refined models. Your organization may elect to use dispersion modeling to determine if pollutant concentrations exceed the National Ambient Air Quality Standards (NAAQS) or to determine if a pollutant concentration is above any health or odor threshold. Some of the models we use include:
- SCREEN3
- ISCST3
- ISCPRIME
- AERMOD PRIME
- CALPUFF
CONTROL TECHNOLOGY DESIGN
We assist in evaluating control technologies being considered for a facility, including a cost and emission reduction analysis, which may be required for regulatory purposes. We have extensive experience in capture analysis, hood design, and capture testing; all of which are integral parts of air pollution control equipment design and certification. Our professionals will also recommend which control technology would best fit the needs of your company. Some types of air pollution control equipment that Liesch personnel have reviewed or designed are:
- Thermal Oxidizers
- Condensers
- Carbon Adsorbers
- Scrubbers
- Baghouses
- Electrostatic Precipitators
- Cyclones
EMISSION REPORTS
Most states require annual reporting of emissions as a basis for fee assessment. In addition, Title V has annual compliance monitoring and emission estimation requirements. we can assist your organization in preparing these reports.
AIR QUALITY COMPLIANCE
We assist our clients in evaluating how their facilities comply with regulations which they are affected by. This process includes developing the easiest and least expensive method of maintaining compliance, and preparing documents and spreadsheets that will allow your personnel to document compliance in a comprehensible manner.
ADDITIONAL SERVICES
We assist companies in complying with a wide variety of air pollution control issues. In addition to the specific areas listed above, we have extensive experience in:
- MACT Compliance
- Risk Management
- Indoor Air Quality
- NSPS Compliance

