Terrestrial Storage of Biomass (TSB) is a long-term, all-natural storage solution that moves carbon within wood out of the fast cycle, where it would decay in months or years, and places it into the slow cycle. This ensures wood will not decay for centuries or millennia. Located in East Texas, we store unwanted biomass in our underground storage vaults, designed to eliminate air and liquid transfer between the wood vault and the atmosphere. Here, carbon is durably and indefinitely stored for over 1,000 years.
About the CSI - Hardin 2023 Project
Our main project, CSI - Hardin 2023, operates from a 45.5-acre area north of Beaumont, Texas, near the Big Thicket Preserve. With a permit from TCEQ MSW (Permit No. 100557), we've buried over 5,000 tCO2e of biomass in six wood vaults over the past two years. Since Spring 2023, in compliance with the Puro.earth TSB Standard, we’ve sequestered over 3,500 tCO2e equivalent of unmerchantable wood slash destined for burning. We also have access to an additional 10,400 tCO2e of wood waste scheduled for burning over the next six months.
Our Hardin site, chosen for its geotechnical, soil, hydrological, and sourcing conditions, features soils conducive to anaerobic conditions, stable hydrology, low seismic risk, and an abundance of approved carbon feedstocks (wood debris). We extract clay from the local Lissie Formation for our confining layer and cap. This heavy, plastic clay with very low hydraulic conductivity (<5.0 x 10^-9 m/s) enables us to bury material up to 25' deep and effectively prevents water infiltration with a 6'-15’ clay cap.
Efficiency, durability and transparency are key to our operations. Our meticulous record-keeping simplifies auditing and buyer inspection procedures for wood handling, carbon verification and emissions testing. Our dedicated team of skilled operators, trained in timber operations, ensures efficient excavation, burial, maximum pit volume, reduced emissions and increased biomass density.
We've pioneered a gas collection system to track gas offtake from the biomass. This includes monitoring the mass transfer, oxygen levels, gas pressure, temperature, and moisture levels within the clay cap. All biomass buyers are welcome to investigate their buried materials and explore options for its future use, such as feedstocks for BECCS, biochar, and green hydrogen. We ensure we have excess clay nearby, and funds set aside for remediation, supporting the long-term stability of our vaults.