As part of a carbon capture and sequestration (CCS) project in USEPA Region 7, Trihydro is preparing and submitting a Class VI Carbon Sequestration well permit application, overseeing the CARB site/project certification package, and conducting continuous baseline testing and monitoring for both shallow subsurface and eco-vegetation survey programs.

Trihydro is part of a large technical team that is responsible for preparing and submitting the Class VI Carbon Sequestration well permit application and the CARB site/project certification package for an ethanol producer located in USEPA Region 7. The initial Class VI application was submitted and deemed administratively complete in October 2023. It is now in the technical review stage of the permit approval process. The CARB certification packages are currently being developed and are expected to be submitted in early 2024.  

Trihydro also designed and implemented the surface and near-surface (shallow) baseline testing and monitoring programs for this project. These programs include eco-vegetation, soil efflux, soil gas, and groundwater monitoring. The soil gas and groundwater monitoring programs include a combination of routine “grab” sample collection for laboratory chemical/isotopic analyses and remote telemetry monitored continuous data loggers/sensors. Soil efflux measurements are also taken at selected monitoring stations from a series of soil collars to establish the baseline soil CO2 flux rates into the atmosphere across the project site. The eco-vegetation survey and remote sensing monitoring program are based upon an initial state digital vegetation survey that was verified by a field ecologist team. The remote sensing and monitoring involves accessing and analyzing a series of multi-spectral satellite imagery for a series of specific target and control stations. In communications with CARB staff, Trihydro evaluated available historical satellite imagery data to identify the peak biomass month for the selected broadband vegetative indices. Annual monitoring events will be held thereafter to monitor the vegetation for anomalous change detection caused by potential CO2 leaks.  

Upon approval of the Class VI permit and CARB certifications, Trihydro will use this monitoring data along with additional CO2 injection and monitoring information to satisfy the Class VI, Subpart RR MRV Plan, IRS 45Q, and CARB LCFS compliance reporting programs. To assist with these long-term and multi-purpose data management requirements, Trihydro incorporates this data from the ongoing baseline monitoring programs into a secure, comprehensive, web-based GIS data management system.  

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