Geosyntec Consultants Logo

Air Quality

Aemetis Riverbank Biofuels Facility Air and Greenhouse Gas Permitting Support

2026-04-02T15:58:10-06:00September 26th, 2025|

As part of the Riverbank Army Ammunition Plant Base Reuse Plan, the City of Riverbank wished to create a unique industrial park and awarded Aemetis the role of master developer for site redevelopment. In this role, Aemetis proposed to develop the “Carbon Zero 1” biofuels facility to produce renewable diesel and sustainable aviation fuel for the growing renewable fuels market, providing alternatives to fossil fuels throughout the central San Joaquin Valley region of California. The project would use processing technologies such as gasification to create a syngas, and through further refinements, renewable hydrogen for use in producing the desired low-carbon-intensity fuels.

Ammonia Facility and Subsea Hydrogen Pipeline Development

2026-04-02T16:31:16-06:00September 26th, 2025|

Gulf Coast Ammonia (GCA) is an agricultural and specialty chemical manufacturing facility that has been in development since 2017. With the addition of its new greenfield anhydrous ammonia production facility on the Texas Gulf Coast, which will produce approximately 1.3 million tons of ammonia per year from hydrogen, it will become one of the largest ammonia producers. Air Products, GCA’s engineering, procurement, and construction (EPC) company and operator, is responsible for the development of the subsea hydrogen feedstock pipeline and the diffuser pipeline into the bay.

Emissions Control Technology Training Program for Global Mining Client

2026-04-02T16:01:02-06:00September 21st, 2023|

Geosyntec was engaged by a global mining client to review and improve the operation and maintenance program for the eight diesel engines that generate power for the remote mining site in Northern Alaska. The expansive open-pit mine is powered by eight generators able to provide up to 40 megawatts of electric power for mining equipment, mill operations, worker accommodations, wastewater treatment, and other uses. The diesel engines are equipped with a selective catalytic reduction (SCR) emissions control system that uses urea-injection to control emissions of nitrogen oxides. Following a series of permit violations due to excess nitrogen oxide emissions, Geosyntec was engaged to review and improve the process controls, standard operating procedures, and associated employee training program.

Confidential Client Greenhouse Gas Inventory Audit and Verification United States and Europe

2026-04-06T13:36:54-06:00September 21st, 2023|

A global manufacturing client with over 100 facilities across North America, Europe, and the South Pacific sought an independent audit of their 2022 greenhouse gas (GHG) corporate emissions statement before submitting it to the CDP for public disclosure.

Regional Haze Four-Factor Analysis for Paper Company

2026-04-02T16:01:02-06:00September 21st, 2023|

Geosyntec was engaged by McKinley Paper Company to review the reasonably available control technologies (RACT) for the facility’s power boilers. We then prepared a four-factor analysis report for submittal to the Washington State Department of Ecology for compliance with the regional haze rule under the Clean Air Act. This rule requires specific industries to conduct periodic evaluations to find ways to reduce emissions of pollutants that contribute to haze and reduce visibility in National Parks and other Federal Class I areas. Regulated pollutants under the regional haze regulations include sulfur dioxide, nitrogen oxides, particulate matter less than 10 microns, sulfuric acid mist, and ammonia.

Corporate Greenhouse Gas Inventory for a Global Oil and Gas Company

2026-04-02T16:01:02-06:00September 21st, 2023|

Geosyntec was engaged by a global oil and gas client to develop a corporate greenhouse gas (GHG) emission inventory incorporating data from more than 400 sites in the United States and internationally. Geosyntec provided expert guidance on inventory methods for national and jurisdictional compliance reporting and for voluntary GHG disclosures. The goal of the project was to develop an efficient and effective GHG data system to support corporate capital and operational decision-making, compliance reporting, and corporate disclosures.

Air Permitting and Regulatory Analysis

2026-04-06T13:38:38-06:00September 14th, 2023|

A toy production company planned to build a new manufacturing facility in the United States in the Richmond, Virginia, area and needed a qualified firm to evaluate air permitting and other environmental compliance requirements for the proposed facility. The client wanted a firm that understood the importance of the local requirements and the urgency of obtaining the required air permit to enable facility construction to proceed on the pre-determined tight schedule. The client also needed a firm that could quantify emissions for the planned equipment and operations and navigate the Virginia Department of Environmental Quality (VaDEQ) regulations and requirements. The main objective of this project was to accurately and completely assess the air permit requirements and expeditiously submit a complete and accurate air permit application to VaDEQ.

Geotechnical Site Investigation for Bay State Wind Offshore Wind Farm Cable Route

2026-04-02T12:50:19-06:00December 13th, 2021|

Orsted was granted a commercial renewable energy lease within a 760-square-kilometer area to build and operate the Bay State Wind offshore wind farm 24km off the south coast of Massachusetts. The project includes constructing and installing 180 wind turbines and two export cable corridors to shore.

Go to Top