A source-based review of combustion emissions, biomass handling, diesel traffic, permitting, monitoring, and the evidence needed to characterize local exposure.
Project River’s published concept includes natural-gas generation, woody-biomass generation, fuel handling, construction activity, and substantial freight movement. Those components can have different air-emission profiles. The reviewed record does not yet contain a complete Project River emissions inventory, permit application, dispersion model, or receptor-specific exposure analysis.
Records and statements that can be tied to an identified source.
Project materials describe up to 1,000 MW of natural-gas generation and 500 MW of woody-biomass generation. That establishes the proposed source categories, not their final permitted emissions.
Sources:RIV-013
Local reporting and SELC materials have raised questions about combustion emissions, biomass scale, truck traffic, and the information needed to evaluate potential air impacts. Those are outside analyses, not final agency findings.
These statements are attributed to the project or its participants and are not automatically independent findings.
Project communications describe the campus as engineered to meet applicable requirements and emphasize planned operating controls. Those statements need to be matched to the actual permit application, equipment, control technologies, and monitoring conditions.
A useful air review separates source emissions, permit limits, modeled concentrations, background conditions, and actual measured exposure.
The TDEC air-notice system and Chattanooga Environmental Field Office are the relevant government sources in the current register for confirming filing status, public-comment opportunities, and issued conditions.
Gas turbines, biomass conversion, wood storage and handling, backup equipment, construction dust, and diesel freight can involve different pollutants, averaging times, controls, and monitoring methods. A complete source inventory should identify them separately.
Expand chronology, community concerns, research priorities, verification methods, and related guidance as needed.
These entries document concerns raised by residents or outside advocates. They are not presented as proven factual conclusions.
Community commentary has raised concern about whether combustion-related pollutants could affect nearby residents, schools, or other receptors. The current record does not yet contain receptor-specific modeling sufficient to characterize that risk.
Residents have also raised questions about dust and particulate emissions associated with biomass unloading, storage, drying, and handling.
Truck traffic and construction activity are recurring community concerns and should be accounted for separately from stationary-source permit limits.
Modern combustion and material-handling systems can incorporate substantial emissions controls. The relevant question is what equipment, limits, monitoring, and enforcement will actually apply here.
Understating operating hours, fuel characteristics, fugitive sources, startup conditions, or traffic could materially change the emissions picture.
Verification requires comparing public-facing claims with the permit-grade source inventory, dispersion model, final permit limits, and post-startup monitoring data.
PFPI’s emissions concerns are appropriate leads for permitting review, but generic wood-combustion factors do not resolve Project River’s final emissions profile.
EPA AP-42 Section 1.6 contains emissions factors for wood-residue combustion in boilers and is a legitimate screening reference when the process matches. Project River public descriptions, however, have used differing terms including pyrolysis, biochar, boilers, and other conversion descriptions. Generic factors should therefore not be presented as final Project River emissions without matching them to the actual equipment and process.
A defensible Project River emissions assessment needs the actual fuel specification, heat input, process flow, control equipment, stack parameters, startup/shutdown assumptions, expected annual operating hours, pollutant calculations, and dispersion modeling submitted to TDEC. PFPI calculations can identify questions to test against that filing but cannot substitute for it.
Project River currently states that pyrolysis and biochar would make the biomass side carbon-negative, while also saying its methodology and verified tonnage figures will be published later. Until the lifecycle boundary, feedstock assumptions, biochar yield and stability, process emissions, and transport inputs are published, The carbon-negative statement remains an attributed project claim rather than an independently established result.
This addendum compares PFPI’s analysis with stronger or more direct sources and identifies which claims are supported, assumption-dependent, unresolved, or unverified. PFPI’s conclusions remain third-party analysis rather than project facts.
