Aries proposes $180 million Sanford gasification plant to process regional bio‑solids; residents press company on PFAS, condensate and Lynden track record

Aries Clean Technologies onstage in Sanford on a weekday evening laid out plans for a privately financed, $180 million gasification facility it says would process about 400 wet tons of regional bio‑solids per day and ‘‘destroy’’ PFAS before returning treated outputs, while local residents pressed the company and its consultants for data and safety assurances.

The Sanford presentations opened with a company overview from Mark Lions, senior director of business development for Aries, who said the plant would be sited in the Cyber Road Industrial Park on an 11‑acre industrial lot, require fewer than 20 truck deliveries per day, and create roughly 30 permanent jobs and 150 construction jobs. ‘‘We are committed to listening, sharing information openly, and working collaboratively with Sanford residents and local officials,’’ Lions said.

Why the project and what it would do

Aries and technical staff described a multistep system: enclosed truck receiving, contained drying (reducing solids to ~10% moisture), a gasifier that produces biochar and a producer gas, and a 2,200°F thermal oxidizer that the company said will complete high‑temperature destruction of PFAS and other organics. Jason Dana, Aries’ vice president of technology, said process vapors and odors would be routed to a thermal oxidizer and advanced emissions controls before release.

Independent modeling and the company’s evidence

Epsilon Associates, the firm that performed the air modeling, said it used EPA’s AERMOD under conservative, worst‑case assumptions (continuous full‑capacity operation). Dr. Sonia Saxs, an environmental health scientist with Epsilon, said modeled concentrations of regulated pollutants were below national ambient air quality standards and that modeled legacy PFAS (PFOA/PFOS) concentrations were far below the strict standards Epsilon identified (‘‘about 30 times lower for PFOA and almost 8,000 times lower for PFOS’’ by the measures they cited).

Dale Brzinski, a chemical engineer on the team, summarized a deposition/groundwater calculation that produced a modeled annual deposition onto a worst‑case 1 m2 square of about 0.016 micrograms/year and a corresponding groundwater contribution on the order of 0.03 parts per trillion — numbers the panel used to argue the facility’s modeled incremental groundwater impact would be negligible compared with existing concentrations.

What residents pressed on

The public comment period—about an hour and a half of questions—focused on multiple recurring concerns: - Condensate/wastewater: Residents pressed whether dryer condensate would carry PFAS back to the Sanford Sewage District. Company and district staff provided mass‑balance numbers: Aries said the plant would add a small incremental PFAS mass (company representatives later stated an increase in mass loading they characterized as small, e.g., from about 0.5 g/day to approximately 0.506 g/day in one modeling explanation) and that modeled concentrations at discharge would not exceed drinking‑water thresholds under their assumptions. Sanford Sewage District officials confirmed they already monitor and treat effluent and said transport and tipping costs are a motivating factor for a local processing option. - Destruction efficiency and testing: Residents cited third‑party test runs at Aries’ Lynden, N.J., site showing 94–97% PFAS reduction in specific tests. Several questioners said they had seen company statements of a 99% destruction claim; Aries’ presenters said the Lynden tests ran at lower thermal oxidizer temperatures (about 1,800°F) while Sanford’s design calls for a 2,200°F oxidizer and improved dryers, and that the company expects higher destruction under the new design, but acknowledged Lynden’s measured test results (notably that the company has not yet demonstrated continuous 99% destruction in full commercial operation). - Lynden (New Jersey) experience and finances: Multiple residents asked why Sanford should accept a facility from a company whose Lynden plant had been idled, undergone reengineering and experienced liquidity and operational problems. CEO John Cousins and other Aries representatives acknowledged past design mistakes (dryers and condensers), said investors had restructured debt, and said the firm now owns the Lyn­den senior debt and plans equipment redesigns and proven dryer vendors for Sanford; they said Lynden will be re‑engineered and returned to service in parallel with Sanford construction. - Site selection, community consent and cumulative impacts: Residents questioned why Sanford was selected and whether the town was being asked to bear risks that will benefit out‑of‑state generators; Aries said Maine sludge would be prioritized and some out‑of‑state loads would be accepted, arguing regional redundancy is desirable. Multiple participants urged independent peer review and epidemiological baseline monitoring; Aries said the Maine DEP review process is the independent technical reviewer of permit applications and committed to posting technical reports publicly. - Emergency and spill scenarios, trucking risk: Speakers asked about truck rollovers, fire, spill cleanup and indemnification. Aries said standard emergency response (local fire/state police/DEP) would apply to roadway incidents, that onsite secondary containment and enclosed handling would limit onsite spill pathways, and that the company intends to post decommissioning/demolition bonds and carry insurance to cover cleanup and decommissioning if necessary.

Regulatory and next steps

Panelists said Aries has submitted air and solid‑waste license applications to the Maine Department of Environmental Protection (DEP) and that those applications are under review. Several residents asked for and were promised public access to underlying technical reports: Aries committed to posting the BAR testing report and a condensed white paper to the project website and said lab data for biochar and emissions testing will be provided on request. The DEP review — not the city council — is the formal permitting route that will determine permit conditions, monitoring, and enforceable operating limits.

What remains unresolved at the meeting

Residents repeatedly requested independent, peer‑reviewed confirmation: long‑term continuous operational test data demonstrating sustained destruction rates at design throughput, clarity on condensate treatment and monitoring requirements, and legally enforceable commitments on feedstock prioritization and decommissioning protections. Aries’ team said many of those items will be addressed through permit conditions and post‑construction testing, and that they will post detailed reports online. The company also reiterated a commitment to hire locally and to prioritize Maine sludge, while acknowledging some out‑of‑state feedstock is likely.

The meeting closed with a reminder that the Maine DEP is the independent reviewer of the air and solid‑waste permit applications, and that written questions and comments can be submitted through the project website.