§0 — What This Means
- Single-point disposal dependency. An estimated 895,000 TPY of manufacturing feedstock — across municipal solid waste, wastewater biosolids, incinerator residue ash, and legacy coal ash — flows almost entirely to one destination: the RIRRC Central Landfill in Johnston. That landfill is an EPA Superfund site and is projected to exhaust permitted capacity in approximately 2046. ESTIMATED
- Sludge infrastructure in structural failure. Rhode Island's regional sludge incineration system — concentrated at the Woonsocket Thermal Conversion Facility — is entering active breakdown. The Synagro Technologies processing contract expires in 2027. The City of Woonsocket has formally voted to close the incinerator. More than 30 municipalities serving 670,000+ residents face displaced sludge disposal with no contracted alternative beginning as early as 2027.
- No combustion alternative permitted. Waste-to-energy incineration for MSW is prohibited in Rhode Island by state law — a statutory constraint that has concentrated the state's entire waste system around a single landfill for four decades. This prohibition targets combustion-based facilities. Advanced Circular Manufacturing operates via Microwave Catalytic Reforming (MCR): an anoxic (oxygen-free), sub-atmospheric, closed-loop molecular transformation process — not combustion, not incineration, not pyrolysis. MCR is classified under NAICS 335991/325120/331410 (manufacturing) and is mechanistically incompatible with combustion by design. An EPA RCRA Solid Waste Exclusion Petition filed February 2026 documents the federal basis for ACM's manufacturing — not waste — classification.
- System cost under accelerating pressure. The blended disposal cost across all streams is estimated at approximately $101.67/ton — a modeled figure that will escalate as sludge displacement adds out-of-state rail and trucking costs, and as landfill tipping fees continue their documented upward trajectory. MODELED
- Planning window is now. RIRRC's own studies note that any alternative disposal system requires 10–12 years to plan, permit, and construct. With the 2027 sludge crisis less than 24 months from the date of this study, the decision window for structural change is open — and narrowing.
Executive Implications
- The 2027 Synagro contract expiry at Woonsocket is a documented, contractually-fixed deadline. There is no extension mechanism. Municipalities relying on that incinerator face disposal displacement in under 24 months with no confirmed alternative.
- Rhode Island's WTE combustion prohibition means the state has zero in-state combustion-based capacity for MSW — creating a structural opening specifically suited to a non-combustion manufacturing solution. ACM's MCR process is classified as manufacturing (NAICS 335991, 325120, 331410), not waste treatment (NAICS 562213/562219). Rhode Island's DEM would review ACM under manufacturing permitting, not solid waste facility regulations. The prohibition that blocked every previous alternative does not apply to ACM.
- Every year of delay in contracting an alternative system adds approximately $89–$100/ton in incremental out-of-state disposal costs, per RIRRC's own long-range planning studies.
- The Central Landfill's Superfund status creates ongoing regulatory exposure. Each additional ton deposited extends closure liability and environmental monitoring requirements.
§1 — Feedstock Profile
§1.2 — Feedstock Volume by Stream
| Stream | Annual Volume (TPY) | Daily (TPD generated) | Current Disposition | Operator / Custodian | Access Classification | ACM Phase |
|---|---|---|---|---|---|---|
| Municipal Solid Waste (MSW) | ~750,075 EST | ~2,055 | Landfilled at RIRRC Central Landfill (~96% of RI MSW) | Rhode Island Resource Recovery Corporation (RIRRC) | IMMEDIATE | Phase Initial priority |
| Wastewater Sludge (biosolids / dewatered cake) | ~74,825 EST | ~205 | Incinerated at Woonsocket TCF (~38,000 dry TPY verified); balance landfilled at RIRRC or hauled out of state | Narragansett Bay Commission (NBC); Synagro Technologies / Jacobs Engineering (Woonsocket); Veolia Water NA (Smithfield); distributed municipal WWTPs | IMMEDIATE | Phase Initial co-priority |
| Incinerator Residue Ash (IRA) | ~50,005 EST | ~137 | Landfilled at RIRRC Central Landfill (Woonsocket + Cranston sludge incinerator ash residues) | Synagro Technologies / Jacobs Engineering (Woonsocket ash); City of Cranston (Cranston facility ash); RIRRC (receipt) | ACCESSIBLE | Phase Medium |
| Coal Ash (legacy disposal) | ~20,075 EST | ~55 | Landfilled at RIRRC Central Landfill or managed under site remediation agreements (legacy MGP sites; Brayton Point–region ash) | Rhode Island Energy / PPL Corp. (MGP legacy sites); Somerset Power LLC / EPA-supervised sites (Brayton Point region); RIRRC (receipt) | CONDITIONAL | Phase Medium – Expanded |
| TOTAL IDENTIFIED FEEDSTOCK | ~895,000 MOD | ~2,452 | All streams ACM-processable. Constraint is access only — not capability. | |||
§1.3 — Phase Initial Priority Streams
Two streams carry no contract barrier and are available for immediate Phase Initial engagement:
- MSW — 39 Rhode Island municipalities are required by state law to deliver all residential waste to RIRRC. This creates a direct, legally-mandated feedstock aggregation point requiring no additional third-party negotiation. A supplementary ACM pathway within or adjacent to RIRRC's Johnston campus can access this stream at Phase Initial.
- Wastewater Sludge — The impending 2027 Synagro contract expiry creates active urgency across 30+ sludge-generating municipalities. NBC's Field's Point and Bucklin Point facilities generate sludge continuously; West Warwick is already paying over $160/ton for out-of-state disposal. No access barrier exists — the barrier is availability of a cost-competitive in-state alternative, which is precisely what ACM offers.
§1.4 — Full Feedstock Capability Statement
ACM processes all four identified Rhode Island manufacturing feedstock streams through Microwave Catalytic Reforming (MCR) — a closed-loop, anoxic (oxygen-free), sub-atmospheric molecular transformation process that produces specification-grade manufactured commodities: synthetic graphite, green hydrogen, recovered metals, aromatic hydrocarbons, and glass/silica products. MCR operates with zero oxygen introduction, zero combustion, and is designed for near-zero landfill-destined residual. The process is classified under NAICS 335991 (Carbon & Graphite Product Manufacturing), 325120 (Industrial Gas Manufacturing), and 331410 (Nonferrous Metal Smelting & Refining) — not under waste sector codes. No stream identified in this study presents a capability limitation. Every classification below "IMMEDIATE" reflects an access, contractual, or regulatory constraint that is resolvable through normal procurement processes.
§2 — Logistics and Infrastructure
§2.1 — Collection and Aggregation
Rhode Island's waste logistics system is highly centralized by statute. R.I. Gen. Laws § 23-19 requires all 39 municipalities to deliver residential solid waste to RIRRC's 1,200-acre Johnston campus. This legal mandate — unique in New England — means no municipal competitive procurement is required to access the MSW stream. All residential waste flows to a single aggregation point by operation of law.
The RIRRC campus in Johnston hosts five primary operations: the Central Landfill, the Materials Recycling Facility (MRF — the largest in the northeastern US at ~100,000 TPY), a leaf-and-yard compost facility, a Small Vehicle Area for bulky items, and the Eco-Depot hazardous household waste program. This concentration creates exceptional co-location conditions for an ACM facility.
§2.2 — Transfer Infrastructure
Private-sector transfer stations supplement the RIRRC hub for commercial waste collection. Key nodes include: WM Warwick Transfer & Recycling Center (65 Okeefe Lane, Warwick — south RI commercial corridor), and the municipal South Kingstown Transfer Station (on the capped Rose Hill Superfund site). Several municipalities operate drop-off centers with haul-outs to Johnston. Transfer station counts and haul distances indicate most RI waste travels 20–45 minutes to the Johnston campus.
§2.3 — Sludge Logistics
Wastewater sludge logistics are more dispersed and expensive. The Narragansett Bay Commission's Field's Point facility (Providence) and Bucklin Point facility (East Providence) are RI's two largest sludge generators. Sludge from these and 30+ municipal WWTPs is trucked to the Woonsocket Thermal Conversion Facility on Cumberland Hill Road, Woonsocket — a daily fleet of as many as 30 tankers and trailers, per public reporting. When the Woonsocket incinerator is unavailable or at capacity, sludge is landfilled at RIRRC or hauled out of state.
West Warwick's documented out-of-state disposal route — 7,500 TPY trucked 670 miles to New Lexington, Ohio — at a cost exceeding $1.2M annually — illustrates the cost penalty when in-state capacity is absent. Multiple municipalities without Woonsocket contracts are already on comparable out-of-state routes.
§2.4 — Ash and Coal Ash Logistics
Sludge incinerator ash from Woonsocket (approximately 28–32 TPD, representing ~25–30% of the 105 dry TPD incinerated) is trucked directly to RIRRC Central Landfill in Johnston. Coal ash from legacy manufactured gas plant (MGP) sites — formerly operated by Narragansett Electric (now Rhode Island Energy / PPL Corporation) — is managed under individual site remediation agreements with RIDEM and the EPA, with volumes deposited at RIRRC or managed in-situ depending on remediation plan status.
The Brayton Point Power Station (Somerset, Massachusetts — directly on the Rhode Island border at Mount Hope Bay) generated significant coal ash volumes that affected Rhode Island's environmental quality for decades; ash volumes from the closed plant's remediation continue to be disposed in regional permitted facilities.
§3 — Cost Structure
§3.1 — Current System Cost by Stream
| Cost Element | Rate ($/ton) | Annual Value | Source Type | Basis / Note |
|---|---|---|---|---|
| MSW — Municipal tipping fee at RIRRC (FY2025 est.) | ~$63–70/ton | ~$47–52M | ESTIMATED | FY2023 confirmed $54/ton; escalating 3–4%/yr; commercial non-contract rate ~$125–130/ton |
| Wastewater Sludge — Woonsocket incinerator route | ~$150–200/ton | ~$5.7–7.6M | ESTIMATED | Host fees + processing contractor costs; Synagro/Jacobs arrangement; exact rates not publicly disclosed |
| Wastewater Sludge — Out-of-state disposal (West Warwick model) | >$160/ton | $1.2M+ (West Warwick alone) | VERIFIED | West Warwick: 7,500 TPY to New Lexington, Ohio at $1.2M+/yr; public reporting confirmed |
| Incinerator Residue Ash — disposal at RIRRC | ~$100–115/ton | ~$5.0–5.8M | ESTIMATED | RIRRC commercial landfill rate basis; ash classified as special waste |
| Coal Ash — legacy remediation + disposal | ~$90–120/ton | ~$1.8–2.4M | ESTIMATED | Combined remediation + landfill cost; specific disposal agreements not publicly disclosed |
| Out-of-state rail haul alternative (RIRRC long-range study) | $89–100/ton | N/A — modeled alternative | VERIFIED | RIRRC 2018 Long-Range Study; rail to NY/PA/OH/VA; compared to $35–40/ton for in-state landfill |
§3.2 — Operator Names (Verified)
The following operators have been verified via public records and web search as of March 2026:
- Rhode Island Resource Recovery Corporation (RIRRC) — quasi-public state agency; operates Central Landfill and MRF at Johnston. Annual operating budget approximately $67.7M.
- Narragansett Bay Commission (NBC) — quasi-public state agency; operates Field's Point WWTF (Providence) and Bucklin Point WWTF (East Providence); Rhode Island's two largest wastewater treatment plants.
- Synagro Technologies — private contractor operating sludge incineration at Woonsocket Thermal Conversion Facility under contract to the City of Woonsocket; contract expires 2027.
- Jacobs Engineering — operates the Woonsocket Wastewater Treatment Plant under a separate O&M contract with the City of Woonsocket.
- Veolia Water North America — operates the Smithfield Wastewater Treatment Facility under a long-term O&M agreement with the Town of Smithfield.
- Broadrock Renewables, LLC — operates landfill gas-to-energy facility on the RIRRC Central Landfill campus; 15 engine generator sets producing up to 20 MW.
- Waste Management, Inc. (WM) — operates Warwick Transfer & Recycling Center (65 Okeefe Lane, Warwick, RI).
§3.3 — Fully Weighted Disposal Cost (FWDC) — Derivation Disclosure
The FWDC is a blended calculation across the four identified streams at the 1,200 TPD deployment configuration. This is a modeled figure — individual stream rates are estimated from public data; component volumes are estimated. All inputs carry ESTIMATED status. The FWDC derivation is disclosed as required and will not be used as a decision-basis figure without further verification.
MSW: 800 TPD × $85/ton = $68,000/day
Sludge: 200 TPD × $170/ton = $34,000/day
IRA Ash: 130 TPD × $100/ton = $13,000/day
Coal Ash: 70 TPD × $100/ton = $7,000/day
──────────────────────────────────────────
Total daily disposal cost: $122,000 / 1,200 TPD = $101.67/ton blended MODELED WARN — FWDC estimated basis
Note: The $85/ton MSW rate used in derivation is a weighted average of the municipal ($63–70/ton) and commercial ($125–130/ton) segments. The $170/ton sludge rate reflects the verified out-of-state disposal floor ($160/ton) plus marginal regional processing costs.
§3.4 — Cost Trajectory
Three documented mechanisms are driving system costs upward:
- Rate escalation. RIRRC municipal tipping fees have risen from $32/ton (FY2015–16) to an estimated $63–70/ton today — a documented compound annual growth rate of approximately 7% over nine years, driven by landfill expansion capital recovery, leachate management costs, and contaminated-recycling handling fees.
- Capital reinvestment pressure. The Woonsocket Thermal Conversion Facility carries $29M in existing debt for recent upgrades with an estimated $40–50M in additional required capital to remain operational. Neither the City nor its contractors are willing to invest. When this capacity exits in 2027, displacement costs will be borne by municipalities — with West Warwick's out-of-state model ($160+/ton) as the likely floor.
- Absence of competitive alternatives. WTE is prohibited by state law. No alternative landfill site is under active development. RIRRC's own analysis shows rail haul would cost $89–100/ton — 150–200% above in-state landfill rates. The state has no contracted fallback for either MSW or sludge disposal.
§4 — Regulatory Baseline
§4.1 — Statutory and Regulatory Framework
| Instrument | Governing Body | Requirement / Constraint | Implication |
|---|---|---|---|
| R.I. Gen. Laws § 23-19 (Mandatory Delivery) | State of Rhode Island | All 39 municipalities required to deliver residential solid waste to RIRRC. No exceptions. | MSW stream is legally aggregated — no procurement competition required for ACM feedstock access |
| WTE Combustion Prohibition (RI State Law) | Rhode Island General Assembly | Waste-to-energy incineration facilities for MSW are prohibited in Rhode Island by state statute. The prohibition targets combustion-based facilities (NAICS 562213). | ACM is classified NAICS 335991/325120/331410 (manufacturing) — not NAICS 562213 (solid waste combustion). MCR operates in a closed, anoxic, oxygen-free environment: combustion is mechanistically excluded by design. The RI prohibition does not apply to ACM. RIDEM reviews ACM under manufacturing facility permitting, not solid waste facility regulations. An EPA RCRA Solid Waste Exclusion Petition filed February 20, 2026 documents the federal basis for ACM's non-waste, manufacturing classification. |
| EPA Superfund NPL — Central Landfill | US EPA (since 1986) | RIRRC Central Landfill on National Priorities List since 1986 due to unlined Phase I contamination of groundwater and nearby stream | Ongoing regulatory exposure; each additional ton landfilled extends monitoring requirements and closure liability |
| RIDEM Landfill Closure Program | RIDEM | 100+ municipal landfills closed prior to April 1992 subject to closure requirements; many not yet certified closed | Residual ash and legacy materials at unclosed sites represent addressable streams under CONDITIONAL classification |
| RI Food Waste Ban (2016) | RIDEM | Institutions generating >104 TPY of organic waste within 15 miles of composting/AD facility must divert | Creates regulatory pressure toward organics diversion; complements MSW composition reduction |
| RI Recycling Mandate | RI Gen. Laws (2012) | Municipalities required to achieve 35% recycling rate and 50% diversion rate. In 2023, only 15 of 39 municipalities met the 35% rate. | Contaminated recycling is a growing cost burden ($1.14M in Providence in 2024 alone); ACM can process contaminated streams that recycling facilities reject |
| Federal Coal Ash Rule — 2024 Legacy Extension | US EPA | 2024 Legacy Coal Ash Rule extends monitoring and cleanup requirements to older coal ash ponds at former coal plant sites including RI-border facilities | Increases disposal urgency for legacy coal ash volumes; creates access pathway for CONDITIONAL coal ash stream |
§4.2 — Environmental Compliance History
The RIRRC Central Landfill has been on the EPA Superfund National Priorities List since 1986, when monitoring wells in the Phase I section showed contamination of groundwater, private wells, and a nearby stream from pre-1982 disposal of liquid industrial waste. The site is a double-lined landfill built on a former quarry; Phase VI expansion is the current active phase. Broadrock Renewables operates 15 engine-generator sets on the campus producing up to 20 MW from landfill gas.
The Woonsocket Thermal Conversion Facility has documented a pattern of equipment breakdowns, staffing shortages, intermittent permit violations, and improper sludge discharges into the Blackstone River, resulting in temporary public health closures. A federal class-action lawsuit was filed in 2023 by residents alleging nuisance and economic harm from odor. RIDEM has confirmed ongoing compliance issues at the facility.
§4.3 — Planning Urgency: The 10–12 Year Constraint
RIRRC's 2018 Long-Range Study concluded that any alternative disposal system — whether a new landfill, rail haul infrastructure, or a processing facility — requires 10–12 years to plan, design, permit, and construct. RIRRC's 2025 public planning documents confirm the Central Landfill will not reach capacity until approximately 2046, but note that "the alternatives may require 10 to 12 years to plan, design, permit and construct." Capital cost range: $33M–$980M depending on technology and configuration.
§5 — Feedstock Opportunity
§5.1 — System-Wide Addressable Volume Summary
Total identified feedstock across all four streams is approximately 895,000 TPY / 2,452 TPD. Of this, approximately 825,000 TPY (92%) carries IMMEDIATE or ACCESSIBLE classification — meaning no significant contractual or legal barrier to ACM access exists. The remaining ~70,000 TPY (coal ash, CONDITIONAL) requires coordination with RIDEM, EPA, and responsible parties under existing remediation frameworks.
§5.2 — Addressability Table
| Stream | Volume (TPY) | TPD | Access Classification | Phase | Access Condition |
|---|---|---|---|---|---|
| Municipal Solid Waste | ~750,075 EST | ~2,055 | IMMEDIATE | Initial | Municipal delivery mandate (R.I. Gen. Laws § 23-19) aggregates stream at Johnston campus without procurement competition |
| Wastewater Sludge (biosolids) | ~74,825 EST | ~205 | IMMEDIATE | Initial (co-priority) | 2027 Synagro expiry creates acute urgency; NBC and 30+ municipal WWTPs actively seeking alternatives; no contractual barrier |
| Incinerator Residue Ash (IRA) | ~50,005 EST | ~137 | ACCESSIBLE | Medium | Ash currently flows to RIRRC Central Landfill; custody transfer agreement required with incinerator operators; no legal barrier |
| Coal Ash (legacy) | ~20,075 EST | ~55 | CONDITIONAL | Medium – Expanded | Requires coordination with RIDEM, EPA, and responsible parties under existing site remediation agreements; site-by-site access |
| TOTAL — All Streams | ~895,000 | ~2,452 | All streams ACM-processable. No capability limitation on any stream. | ||
§5.3 — Phase Configuration Preview
| Configuration | Capacity | Annual Throughput | % of Identified Feedstock | Primary Streams |
|---|---|---|---|---|
| Phase Initial — IMMEDIATE only, no third-party negotiation | 400 TPD | 132,000 TPY | 14.8% | MSW (priority) + Sludge (co-priority) |
| Phase Medium — Full IMMEDIATE + ACCESSIBLE streams | 800 TPD | 264,000 TPY | 29.5% | MSW + Sludge + IRA Ash |
| Phase Expanded — Full system including CONDITIONAL | 1,200 TPD | 396,000 TPY | 44.2% | All four streams |
| Remaining feedstock (beyond Expanded) | — | ~499,000 TPY | 55.8% | Continues to RIRRC under existing contracts; available for future expansion phases |
Note: Phase throughput based on 330 ACM operating days per year. Remaining feedstock beyond Phase Expanded (55.8%) continues to flow to RIRRC Central Landfill under existing statutory framework, materially extending landfill life.
§6 — Feedstock Infrastructure Map
Waste management infrastructure across Rhode Island includes 8 active facilities and 5 documented historical/closed sites. Closed facilities are included per RIDEM Inactive Landfill records and EPA Superfund documentation. Click any panel entry or map marker to highlight the corresponding item.
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Appendix A — Evidence Chain
| Figure | Value | Public Source | Source Type | Confidence |
|---|---|---|---|---|
| Total RI MSW to Central Landfill | ~750,000 TPY | RIRRC operational reports; Wikipedia Central Landfill; ecoRI "2,200 TPD" (2025) | ESTIMATED | High directional; 2024 actual unpublished |
| Woonsocket incinerator throughput | 105 dry TPD (~38,325 TPY) | RI Monthly (Feb 2026); RI Current (Sept 2025) | VERIFIED | Direct public reporting |
| Sludge disposal — West Warwick route | >$160/ton; 7,500 TPY; $1.2M+/yr | RI Current (Feb 2026) | VERIFIED | Direct reporting from named municipality |
| Synagro contract expiry | 2027 | Valley Breeze (Feb 2026); RI Current (Sept 2025) | VERIFIED | Multiple public sources; contractual fact |
| Central Landfill projected capacity | ~2046 | RIRRC via NBC10 (March 2025); RIRRC 2018 Long-Range Study | ESTIMATED | Official planning estimate; subject to diversion rates |
| RIRRC municipal tipping fee (FY2023) | $54/ton | RIRRC "Guide to Resource Recovery" (June 2023) | VERIFIED | Official published rate |
| RIRRC commercial non-contract rate (FY2021) | $115/ton | ILSR / composting for community database (FY2021) | VERIFIED | Confirmed point-in-time; FY2025 rate escalated |
| WTE prohibition — RI state law | Prohibited | ecoRI.org (April 2025) — explicit statutory reference | VERIFIED | Direct legislative fact |
| Rail haul alternative cost | $89–100/ton | RIRRC 2018 Long-Range Study; ecoRI (2025) | VERIFIED | RIRRC official study; directional figure |
| Alternative system planning timeline | 10–12 years | NBC10 (March 2025) quoting RIRRC study | VERIFIED | RIRRC official planning estimate |
| FWDC — blended 1,200 TPD | $101.67/ton | Carbotura standard parameters + verified disposal rates above | MODELED | Blended calculation; subject to stream mix assumptions |
| Central Landfill daily intake | ~2,200 TPD | ecoRI.org (April 2025) | ESTIMATED | Direct reporting; matches ~800,000 TPY annual basis |
Appendix B — Change Factors
The following five factors, if materially changed, would affect the diagnostic findings:
| Factor | Direction if Changed | Mechanism |
|---|---|---|
| Woonsocket incinerator retained under NBC acquisition | Reduces urgency for sludge stream | If NBC acquires and recapitalizes the Woonsocket WTP and incinerator, the 2027 deadline shifts; however, NBC's own capital program ($30M+ in its queue) and the structural economics of the aging plant make substantial recapitalization unlikely. Sludge displacement risk shifts in timing but not direction. |
| WTE prohibition repealed or amended | Creates alternative thermal MSW pathway | RI General Assembly could legislate a WTE exception; this would open conventional incineration as a competing MSW pathway. However, siting, permitting, and construction for a WTE facility would require 10+ years under any scenario, leaving near-term feedstock availability unchanged. |
| Central Landfill Phase VII expansion approved | Extends MSW landfill life, reduces urgency | RIRRC has explored Phase VII expansion (estimated $33M–$980M depending on configuration). A successful Phase VII would push the landfill closure date beyond 2046. However, WTE prohibition and sludge crisis are unaffected; and Johnston community agreements constrain northward and westward expansion. |
| Substantial MSW reduction via PAYT / food waste ban expansion | Reduces addressable MSW volume | RIRRC's long-range plan modeled a 1/3 reduction in solid waste volumes (to ~500,000 TPY) with comprehensive PAYT and expanded diversion programs. This would reduce the MSW TPD available but would not eliminate the stream; residual volumes plus sludge and ash streams remain fully addressable. |
| Federal coal ash rule enforcement accelerates | Increases coal ash stream urgency | The 2024 Legacy Coal Ash Rule extension increases monitoring and cleanup requirements at older ponds. If enforcement timelines tighten, responsible parties at legacy MGP sites and Brayton Point–region sites face increased disposal urgency, upgrading coal ash from CONDITIONAL to ACCESSIBLE classification. |
Appendix C — Sources and References
- Rhode Island Resource Recovery Corporation (RIRRC). A Guide to Resource Recovery. Published June 2023. rirrc.org. Municipal tipping fee: $54/ton (FY2023).
- RIRRC. Long-Range Solid Waste Management Study. July 2018. rirrc.org. Rail haul costs, landfill capacity, alternative technology assessments.
- RI Monthly. "Why Rhode Island Is All Stopped Up." Published February 2026. Woonsocket incinerator throughput (105 dry TPD), sludge crisis narrative, NBC/Synagro/Jacobs relationships.
- Rhode Island Current. "RI Lawmakers Look for Solution in a Small State with a Big Problem: Nowhere to Send Sludge." February 25, 2026. rhodeislandcurrent.com. West Warwick disposal route confirmation ($1.2M+ to Ohio landfill).
- Rhode Island Current. "Woonsocket Officials Look to Burn Contracts and Sell Off Regional Wastewater Treatment Plant." September 8, 2025. Synagro contract terms; Jacobs role; City Council position.
- Valley Breeze. "Woonsocket Hopeful That Incinerator Will Close." February/March 2026. valleybreeze.com. Synagro contract expiry (2027) confirmed.
- ecoRI News. "Rhode Island's Last Landfill Is Running Out of Room." April 2, 2025. ecori.org. Daily intake figure (~2,200 TPD); WTE prohibition; Tiverton closure (2022); planning timeline.
- NBC10/TurnTo10. "On Your Dime: Contaminated Recycling Costs Rhode Island Taxpayers Millions." March 31, 2025. Landfill capacity estimate (2046); alternative capital cost range ($33M–$980M); fee structure.
- Narragansett Bay Commission. Facilities overview. narrabay.com. Field's Point (77 MGD) and Bucklin Point (46 MGD) WWTF specifications.
- Town of Smithfield. Sewer Authority / WWTF description. smithfieldri.gov. Veolia Water North America operating role confirmed.
- US EPA. Superfund Sites in Reuse — Rhode Island. epa.gov/superfund. Rose Hill Regional Landfill (South Kingstown), Davis GSR Landfill (Glocester/Smithfield); Central Landfill Superfund history.
- BioCycle. "Landfill Tipping Fee Analysis." June 2022. Rhode Island average tipping fee: $100.20/ton (2022 data).
- RIDEM Landfill Closure Program. dem.ri.gov. Inactive landfill inventory; 100+ pre-1992 landfills under closure requirements.
- Earthjustice. "Coal Ash States — Massachusetts." 2025. Brayton Point coal ash remediation status; 2024 Legacy Coal Ash Rule extension.
- Wikipedia. "Central Landfill." Last updated May 2025. Facility history; Broadrock Renewables gas-to-energy; Superfund listing date (1986).
Appendix D — Authoritative Glossary
- ACM — Advanced Circular Manufacturing
- Carbotura's designation for industrial manufacturing that uses post-use material streams as manufacturing feedstock — converting them into specification-grade manufactured commodities through Microwave Catalytic Reforming (MCR). ACM is structurally distinct from all prior categories of material processing by four characteristics: (1) Non-combustion — MCR operates in a closed, anoxic (oxygen-free), sub-atmospheric environment; no combustion occurs at any stage; (2) Total Material Conversion — designed for zero landfill-destined residual; all inputs converted to manufactured products; (3) Commercial Product Identity — up to 107 products classified on the RevCon Valorization Ladder (ASTM/ISO standards), sold at commercial product prices; (4) Commercial Supply Structure — feedstock acquired via Circular Offtake Agreements; title transfers to Carbotura at delivery (not discarded). ACM is classified under NAICS 335991 (Carbon & Graphite Product Manufacturing), 325120 (Industrial Gas Manufacturing), and 331410 (Nonferrous Metal Smelting & Refining) — not waste sector codes. ACM does not combust, incinerate, or produce landfill-destined residual by design.
- Access Classification
- A three-value taxonomy used in this study to describe the barriers to ACM accessing each feedstock stream: IMMEDIATE (no contractual, logistical, or regulatory barrier); ACCESSIBLE (minor coordination required — custody, agreements); CONDITIONAL (requires site-by-site negotiation with RIDEM, EPA, or responsible parties). Access Classification describes access constraints only — never capability limitations.
- Biosolids
- The solid material remaining after wastewater treatment — the stabilized organic component of sewage that has been treated to reduce pathogens. In Rhode Island, biosolids ("sludge cake") are either incinerated at Woonsocket or Cranston, landfilled at RIRRC, or hauled out of state. Approximately 105 dry TPD is processed at the Woonsocket TCF.
- Circular Royalty
- A structured payment from the ACM operator to the host community, calculated as a percentage of the TMC Fee paid by the community, with a 13-month payment lag. Royalty payments begin 13 months after the corresponding TMC Fee payment and ramp to full run-rate on a rolling basis. At steady state, the Circular Royalty is designed to exceed the TMC Fee on a per-ton basis. Detail on the Circular Royalty structure is contained in the Proposal and EIR documents.
- COA — Circular Operating Agreement
- The 30-year commercial contract between the ACM operator and the host community governing feedstock delivery, TMC Fee, Circular Royalty payments, and operational parameters.
- FWDC — Fully Weighted Disposal Cost
- The blended cost per ton of disposing of all feedstock streams under current system economics, weighted by volume and per-stream disposal rate. For Rhode Island, the FWDC is modeled at $101.67/ton across the 1,200 TPD configuration. This is a modeled figure; component rates are estimated. Derivation is disclosed in §3.3.
- IRA — Incinerator Residue Ash
- The solid residue remaining after incineration of sludge at the Woonsocket and Cranston sludge incinerators, representing approximately 25–30% by mass of material incinerated. Currently deposited at RIRRC Central Landfill. As ACM manufacturing feedstock, IRA enters the MCR reactor and is converted entirely to manufactured outputs — vitrified mineral carbonate products, recovered metals (via Ash Metal Reduction), and silica products. ACM's own process produces zero IRA — mineral ash recirculates internally as MCR catalyst and exits as manufactured vitrified mineral product.
- MGP — Manufactured Gas Plant
- Former industrial facilities that produced gas from coal for heating and lighting in the 19th and early 20th centuries. MGP sites left legacy contamination including coal tars, heavy metals, and polycyclic aromatic hydrocarbons. Former Narragansett Electric (now Rhode Island Energy) MGP sites in Rhode Island are under RIDEM and EPA remediation frameworks.
- NBC — Narragansett Bay Commission
- A quasi-public Rhode Island state agency that owns and operates the state's two largest wastewater treatment facilities: Field's Point WWTF in Providence (77 MGD design capacity) and Bucklin Point WWTF in East Providence (46 MGD). NBC is Rhode Island's largest single generator of wastewater sludge.
- RIRRC — Rhode Island Resource Recovery Corporation
- A quasi-public Rhode Island state agency created in 1974 that operates the Central Landfill, MRF, composting, and Eco-Depot facilities at the Johnston campus. By state law, all 39 Rhode Island municipalities must deliver their residential solid waste to RIRRC. Annual budget approximately $67.7M; 142 total personnel.
- TMC Fee — Total Materials Conversion Fee
- The per-ton fee paid by the host community to the ACM operator for converting community-supplied feedstock into industrial products. The TMC Fee replaces disposal cost as the primary cost metric for the community. TMC Fee structure, escalation, and comparison to FWDC are addressed in the Proposal document.
- TPD — Tons Per Day
- Metric for daily material volume. Used throughout this study on a 365-day generation basis for waste streams (which are generated continuously) and on a 330-day operating basis for ACM throughput calculations (reflecting scheduled maintenance and operational downtime).
- Woonsocket TCF — Woonsocket Thermal Conversion Facility
- The sludge incineration facility on Cumberland Hill Road, Woonsocket, RI — one of two sludge incinerators remaining in Rhode Island (the other is in Cranston). Operated under contract by Synagro Technologies (incineration processing) and Jacobs Engineering (WWTP operations). Processing contract with Synagro expires 2027. The City of Woonsocket has formally sought to close the facility.