City & County of Honolulu
ACM Economic Impact Report
& Partnership Proposal
A three-tier Advanced Circular Manufacturing proposal addressing Oʻahu's 2028 disposal infrastructure crisis — with quantified cost transformation, liability elimination, and 30-year Circular Royalty™ projections for the island's residents.
This document contains analysis, projections, and commentary prepared by Carbotura Inc. in its capacity as a commercial proposer. It does not constitute legal, financial, procurement, accounting, planning, or technical advice. The City & County of Honolulu and its officers should seek independent professional advice before taking any decision. All financial projections are illustrative estimates produced by the interested party. See the Commercial Interest Disclosure at the top of this document. Corrections: transparency@carbotura.com
Executive Summary — Oʻahu ACM Partnership Proposal
- The 2028 problem demands a new answer. Waimanalo Gulch Sanitary Landfill is ordered to close by March 2, 2028. LUC Order SP09-403 · 2019 No replacement landfill has been permitted. H-POWER combustion ash — ~150,000 tons per year — has no alternative disposal route. Carbotura's Advanced Circular Manufacturing (ACM) facility is designed to eliminate reliance on legacy disposal sites — accepting Oʻahu's community-sourced feedstock as manufacturing input with near-zero residuals to landfill. LOW
- Cost transformation under all three tiers. The Technology & Manufacturing Contribution (TMC) Fee is set at $150/ton under all tiers (ceiling applies at estimated FWDC of ~$165/ton). At 400 TPD (146,000 t/yr), this delivers ~$21.9M/yr in structured community revenue, projected to save ~$2.2M/yr versus current all-in disposal cost. LOW
- Circular Royalty™ begins 13 months after first feedstock delivery. Based on the Business Baseline (50% of current market pricing for RevCon™ outputs), the Circular Royalty™ is projected to deliver ~$2.92M (400 TPD), ~$9.13M (1,000 TPD), or ~$21.9M (2,000 TPD) in Year 2, growing at 4% per annum over the 30-year term. All figures carry LOW confidence and are illustrative estimates.
- 30-year combined benefit per Oʻahu resident. At the 1,000 TPD tier: ~$545M combined benefit over 30 years — approximately $18.79/resident/year from Year 2 forward (~$545M ÷ 1,000,000 residents ÷ 29 years). At 2,000 TPD: ~$1.20B — approximately $41.21/resident/year. LOW — illustrative estimates only
- Technology designed for near-zero residuals. Carbotura's system integrates proven component technologies — including microwave energy, catalytic reforming, and advanced separation — each with decades of industrial use. The Recyclotron™ reactor uses electromagnetic energy in an anoxic (no-oxygen) environment. No combustion occurs. The process is designed for near-zero residuals to landfill and near-zero greenhouse gas emissions from the reforming process.
- The AA+ balance sheet advantage. With S&P assigning a stable AA+ rating to Honolulu's General Obligation bonds, the city has financing capacity to participate in ACM infrastructure. A Circular Offtake Agreement structured as an operational expenditure rather than capital commitment can preserve balance sheet headroom — material for a city already carrying HART rail project reimbursable GO debt. S&P Global · Honolulu 2025
Table of Contents
- SQ1 — Disposal Cost Profile & FWDC
- SQ2 — Capacity & Infrastructure Status
- SQ3 — Liability Exposure
- SQ4 — Market & Operator Landscape
- SQ5 — Goals vs. Reality Gap
- EIR1 — Cost Transformation
- EIR2 — Liability Elimination
- EIR3 — Capacity Solution
- EIR4 — Jobs & Economic Impact
- EIR5 — Fiscal Impact
- EIR6 — Balance Sheet Transformation
- EIR7 — Environmental Correction
- P0 — What Carbotura is Proposing
- P1 — About ACM & Technology
- P2 — Three-Tier Build Plan
- P3 — Financial Comparison
- P4 — Community Returns (30-Year)
- P5 — Next Steps & Accountability
- Appendices A–F
Version 1.0 · March 2026 · Next review September 2026 · Corrections: transparency@carbotura.com
Disposal Cost Profile
This section establishes the Facility-Weighted Disposal Cost (FWDC) — the benchmark against which the TMC Fee is calibrated. All figures carry LOW confidence due to commercial contract confidentiality and must be independently verified.
FWDC Derivation — City & County of Honolulu
| Disposal Stream | Est. Annual Volume | Stream Share % | Est. Gross Cost/ton | Weighted Contribution | Conf. |
|---|---|---|---|---|---|
| H-POWER processing (combustible MSW) | ~691,000 t/yr | 72.8% | $110/t ⚠⚠ | $80.08 | LOW |
| WGSL disposal (ash + special waste) | ~250,000 t/yr | 26.3% | $105/t ⚠⚠ | $27.62 | LOW |
| Transfer station / special handling | ~8,000 t/yr | 0.9% | $150/t est. | $1.35 | LOW |
| FWDC (Σ weighted average) | ~949,000 t/yr | 100% | — | ~$109/t | LOW |
FWDC derivation: Σ(stream cost × stream share) = ($110 × 0.728) + ($105 × 0.263) + ($150 × 0.009) = $80.08 + $27.62 + $1.35 = ~$109.05/ton (floor estimate) LOW
Full-cost upper bound estimate: ~$165/ton (including Hawaii island labour premium, contractor profit margin, and capital recovery). LOW — H-POWER gate fee commercially confidential — estimate based on 2020 commercial rate and island cost-of-living adjustment; see SQ4 for operator landscape detail.
TMC Fee Calibration
Technology & Manufacturing Contribution Fee — Oʻahu
The $150/ton ceiling applies at any FWDC above $155/ton. Under Oʻahu's island cost structure, the ceiling is expected to apply under all plausible FWDC scenarios. The $100/ton floor applies where FWDC − $5 falls below $100/ton — not applicable here.
Capacity & Infrastructure Status
Oʻahu's disposal infrastructure is operating near or at capacity across its primary facilities, with hard closure orders creating a forward capacity cliff.
| Facility | Operator | Current Capacity | Current Utilisation | Closure/Constraint Date | Status |
|---|---|---|---|---|---|
| H-POWER (WTE) | Reworld Honolulu LLC | ~3,000 TPD maximum; ~2,000 TPD operational Hawaiian Electric 2024 | ~691,000 t/yr processed (FY2023) Hawaii DOH 2024 | No closure order; technology reinvestment needed | AGEING — reinvestment overdue |
| WGSL (Municipal Landfill) | WM of Hawai'i Inc. | ~250,000 t/yr current intake City ENV 2024 | ~65% ash/residue; ~35% MSW + special City ENV 2024 | March 2, 2028 (binding LUC Order) | CLOSURE IMMINENT |
| PVT Landfill (C&D) | PVT Land Co. | C&D only; volume not publicly disclosed | Active; approaching capacity | ~2028–2030 est. Hawaii DOH 2024 | APPROACHING CAPACITY |
| Hawaiian Earth Recycling | Hawaiian Earth Recycling | Green waste composting | Active under city contract | No known constraint | OPERATIONAL |
| Wahiawā replacement landfill | TBD | Not yet designed | N/A — not operational | Proposed site only; permitting not commenced (Dec 2024) | YEARS FROM OPENING |
Liability Exposure
Market & Operator Landscape
Oʻahu's disposal market is a statutory duopoly at the processing and landfilling level. Mandatory flow control under ROH §42-4.2 requires all private haulers of combustible waste to use H-POWER. City ENV · Business Rules 2024 This eliminates price competition at the gate and creates a structural barrier to technology adoption without regulatory amendment.
| Market Segment | Operator | Market Position | Regulatory Basis | Competition Status |
|---|---|---|---|---|
| Combustible MSW processing | Reworld Honolulu LLC | Statutory monopoly | ROH §42-4.2 mandatory flow control | No competition at gate |
| Municipal landfilling | WM of Hawai'i Inc. | Sole permitted site | State DOH permit; LUC order | No alternative |
| C&D landfilling | PVT Land Company | Sole island C&D site | Private permit | No alternative |
| Commercial collection | Multiple licensed private haulers | Distributed | City licensing | Competitive — but all routes end at H-POWER |
The documented operational record shows: the LUC closed WGSL with a 2028 deadline; Reworld did not respond to media enquiries in January 2026; Civil Beat Feb 2026 the Hawaii DOH Solid Waste Section has operated with documented resource constraints since at least 2016. Hawaii DOH 2016 The institutional framing used in this document is factual attribution to the operational record — not editorial characterisation of intent.
Goals vs. Reality Gap
| Goal | Target | Documented Status | Gap | Conf. |
|---|---|---|---|---|
| Aloha+ 70% diversion by 2030 (HRS §342G statutory definition) | 70% by 2030 | ~34–38% est. (excl. H-POWER incineration from count) | ~32–36 pp shortfall | MED |
| WGSL alternative site identification | Dec 31, 2022 (extended to Dec 31, 2024) | Site announced Dec 2024 — extended deadline met | Initial deadline missed 2 years | HIGH |
| WGSL closure compliance | March 2, 2028 | Replacement not yet permitted or funded | ~24 months — capacity gap likely | HIGH |
| H-POWER ash recycling | Reduce WGSL ash intake | Contracted but not operational (2024) | ~150,000 t/yr continues to WGSL | HIGH |
| Organic waste diversion (HB895) | Graduated to 100% by 2045 | Pilot G.R.O.W. programme starting April 2026 | Early-stage programme | MED |
Cost Transformation
This section directly responds to SQ1's finding: Oʻahu's all-in disposal cost is estimated at $109–165/ton (conf-l), entirely paid to contracted third-party operators with no community revenue return. ACM replaces this cost structure with a TMC Fee that is calibrated below current disposal cost, plus a Circular Royalty™ that flows back to the community from Year 2.
Oʻahu pays an estimated $109–165/ton⚠ to dispose of community-sourced feedstock at H-POWER and WGSL. No revenue returns to the community from this expenditure. The contracted operators retain processing revenue and electricity income under commercially confidential terms. LOW
Under ACM, the City & County of Honolulu pays the TMC Fee of $150/ton — designed to be below the estimated full-cost FWDC of $165/ton — while receiving a Circular Royalty™ beginning 13 months after first feedstock delivery. The net cost position at 400 TPD is projected to save ~$2.2M/yr versus current estimated disposal cost, growing as the Circular Royalty™ compounds. LOW
Cost Transformation by Tier — Year 1 vs. Current
| Tier | TPD | Annual Feedstock | Current Est. Cost ($165/t) | TMC Fee ($150/t) | Annual Saving | Conf. |
|---|---|---|---|---|---|---|
| Minimum | 400 | 146,000 t | $24.09M | $21.9M | ~$2.2M/yr | LOW |
| Tier 1 | 1,000 | 365,000 t | $60.225M | $54.75M | ~$5.5M/yr | LOW |
| Tier 2 | 2,000 | 730,000 t | $120.45M | $109.5M | ~$11.0M/yr | LOW |
All figures based on Carbotura standard deployment model · FWDC = $165/ton (conf-l) · TMC Fee = $150/ton (ceiling) · Annual feedstock = TPD × 365 · Saving = (FWDC − TMC Fee) × annual feedstock
Liability Elimination
This section directly responds to SQ3's finding: Oʻahu carries an estimated $315–$890M+ in waste infrastructure liabilities, largely off-balance-sheet. ACM is designed to eliminate reliance on legacy disposal sites — removing the primary forward liability driver.
WGSL closure requires ~$50–150M in closure costs and ~$15–40M in 30-year post-closure monitoring. The Wahiawā replacement landfill is projected to require $200–500M+ in capital. H-POWER technology reinvestment is estimated at $50–200M+. PFAS liability is unquantified. Total known + contingent: $315M–$890M+. LOW
An ACM facility designed for near-zero residuals to landfill eliminates the ongoing ash disposal burden (~150,000 t/yr), extends WGSL runway, reduces the scale of the required replacement landfill, and removes the primary driver of future PFAS leachate exposure from landfill-deposited combustion ash. The city would not need to commission a replacement landfill of the same scale if ACM absorbs the primary MSW stream. LOW — based on process design specification
Capacity Solution
This section responds to SQ2's finding: Oʻahu faces a hard capacity cliff in March 2028 with no operational replacement confirmed. ACM provides a designed solution to the capacity gap within the closure timeline.
WGSL closes March 2, 2028. No replacement landfill is permitted or funded. H-POWER ash (~150,000 t/yr) has no alternative destination. The Wahiawā site will require multi-year permitting. A capacity gap beginning March 2028 is the most likely outcome under current trajectories. HIGH
Carbotura's ACM facility is designed for near-zero residuals to landfill. It accepts community-sourced feedstock including the mixed MSW stream as manufacturing input. Configured to accept mixed feedstock streams, the facility is designed to divert the primary combustible material flow from legacy disposal — providing the capacity solution that a new landfill cannot deliver within the 2028 window. LOW — based on process design specification
| Tier | TPD | Annual Capacity | % of Oʻahu MSW (1.2M t/yr) | Landfill Diversion Potential |
|---|---|---|---|---|
| Minimum | 400 | 146,000 t | ~12.2% | Near-zero residuals from this stream to landfill (designed) |
| Tier 1 | 1,000 | 365,000 t | ~30.4% | Near-zero residuals from this stream to landfill (designed) |
| Tier 2 | 2,000 | 730,000 t | ~60.8% | Near-zero residuals from this stream — materially reduces new landfill requirement |
Jobs & Economic Impact
A Carbotura ACM facility creates direct manufacturing employment and induced economic activity. The following figures are projected under Carbotura's standard deployment model and carry LOW confidence as forward-looking estimates.
Direct Manufacturing Jobs
A 400 TPD ACM facility is projected to generate approximately 80–120 direct permanent manufacturing roles — skilled technical, operational, and management positions. These are manufacturing jobs, not disposal roles. LOW
Indirect & Induced Employment
For every direct manufacturing role, an estimated 2–3 additional jobs are supported in the local supply chain and services economy (Hawaii multiplier — island economy with premium service costs). LOW
Feedstock Hauler Jobs
Feedstock Hauler contracts for collection and delivery to the ACM facility support additional transportation employment. All Feedstock Hauler roles are capitalised — representing a recognised position in the ACM supply chain distinct from legacy refuse collection. LOW
Economic Diversification
Oʻahu's economy is concentrated in tourism, government, and military. A manufacturing facility represents economic diversification — providing stable employment less sensitive to tourism cycles. This is a strategic benefit beyond the direct job count.
Fiscal Impact
The ACM partnership has three distinct fiscal impact channels for the City & County of Honolulu under GASB accounting standards.
| Fiscal Channel | Direction | 400 TPD / Year 1 | 1,000 TPD / Year 1 | 2,000 TPD / Year 1 | Conf. |
|---|---|---|---|---|---|
| TMC Fee expenditure (replacement of disposal cost) | Outflow (vs. current cost) | $21.9M | $54.75M | $109.5M | LOW |
| Annual saving vs. estimated current disposal | Net saving | ~$2.2M/yr | ~$5.5M/yr | ~$11.0M/yr | LOW |
| Circular Royalty™ (from Year 2 — 13 months after first feedstock delivery) | Inflow | ~$2.92M/yr | ~$9.13M/yr | ~$21.9M/yr | LOW |
| Capital avoidance (reduced new landfill requirement) | Avoided outflow | Partial (small reduction) | Moderate reduction | $100M–$300M+ est. (if Tier 2 replaces primary stream) | LOW |
| WGSL post-closure monitoring reduction | Partial avoided outflow | Minimal (small volume diversion) | Moderate (less landfill intake) | Significant (less ash burden on WGSL) | LOW |
Under GASB standards, the Circular Offtake Agreement would likely be classified as a service agreement (operating expenditure) rather than capital infrastructure. This preserves the city's balance sheet capacity for other capital obligations — including the HART rail reimbursable GO debt currently outstanding at approximately $859M. S&P Global · Honolulu 2025 Independent accounting advice is required to confirm GASB classification. LOW
Balance Sheet Transformation
Municipal Credit Quality Context
S&P Global assigned the City & County of Honolulu's Series 2025 General Obligation bonds a rating of AA+ with a Stable outlook in 2025. S&P Global Ratings · Honolulu 2025 Key credit factors noted by S&P include: a diversified economy with an extremely large tax base; Hawaii's most important tourism destination; strong federal and military presence (~21% of total employment); and the city's commitment to structural balance. HIGH
Negative credit factors cited include: elevated debt position related to the HART rail project (reimbursable GO debt of ~$859M outstanding); affordability concerns; negative demographic trends; exposure to climate and sea-level-rise risks; and dependence on oil imports and general import reliance. S&P Global · 2025
ACM Balance Sheet Impact
The city faces $200–500M+ in unfunded new landfill capital, plus WGSL closure costs and H-POWER reinvestment — all as GO bond candidates competing with HART reimbursable debt maturity and other CIP commitments. This forward capital stack is a material balance sheet stress for even a AA+ credit. LOW
A Circular Offtake Agreement structured as a service contract (operating expenditure) adds no GO debt to the balance sheet. Avoided capital expenditure on a major new landfill ($200–500M+) directly reduces future GO bond issuance requirement. The Circular Royalty™ inflow from Year 2 provides growing unencumbered revenue to the Solid Waste Special Fund. LOW — requires independent GASB and legal review
Borrowing Cost Chain
| Scenario | GO Bond Requirement | Est. Borrowing Cost (AA+ 30yr) | Annual Debt Service | 30-yr Total Interest |
|---|---|---|---|---|
| Status quo — build replacement landfill | $300M (mid-range est.) | ~4.5–5.5% est. LOW | ~$17–19M/yr | ~$210–270M est. |
| ACM Tier 2 — major landfill scale-down | $50–100M (contingency only) | ~4.5–5.5% est. | ~$3–6M/yr | ~$40–90M est. |
| Borrowing cost reduction (illustrative) | — | — | ~$11–16M/yr avoided | ~$120–230M avoided interest |
All borrowing cost figures are illustrative estimates only. LOW Independent financial and legal advice required.
Environmental Correction
This section responds to SQ5's finding: Oʻahu is substantially behind on its statutory diversion goal, and its primary diversion mechanism (H-POWER incineration) produces ~150,000 tons per year of combustion ash requiring perpetual landfilling alongside near-zero greenhouse gas mitigation value.
H-POWER processes ~691,000 t/yr through combustion. State law (HRS §342G-01) classifies incineration as disposal, not diversion. Combustion produces ~150,000 t/yr of ash for landfilling — consuming WGSL's rapidly diminishing runway. Under the statutory definition, Oʻahu's genuine diversion rate is ~34–38%, against a 70% by 2030 target. MED
ACM is designed for near-zero residuals to landfill and near-zero greenhouse gas emissions from the reforming process. Carbotura's system integrates proven component technologies — including microwave energy, catalytic reforming, and advanced separation — each with decades of industrial use. The Recyclotron™ reactor uses electromagnetic energy in an anoxic (no-oxygen) environment. No combustion occurs. ACM outputs — Liquifact™, manufactured mineral aggregate, Renewable Graphite, and Renewable Refined Water — are engineered manufacturing outputs, not residuals. LOW — based on process design specification
What Carbotura Is Proposing
Carbotura Inc. proposes a Stage 1 partnership with the City & County of Honolulu to develop an Advanced Circular Manufacturing facility on Oʻahu — converting community-sourced feedstock into RevCon™ manufactured products while delivering structured financial returns to the community through the Circular Royalty™ programme.
The Core Exchange
The city delivers community-sourced feedstock to the ACM facility. Carbotura processes it through the ACM molecular reforming process, converting it into RevCon™ manufactured outputs. The city pays the TMC Fee ($150/ton). Carbotura pays the Circular Royalty™ from Year 2.
Not a Disposal Contract
This is a Circular Offtake Agreement — not a waste disposal contract. The ACM facility is a manufacturing facility. The city is a manufacturing feedstock supplier, not a customer of a disposal service. This framing has legal, accounting, and regulatory implications.
Three Tiers Available
The proposal is structured across three capacity tiers — 400 TPD (Minimum), 1,000 TPD (Tier 1), and 2,000 TPD (Tier 2) — allowing the city to match ACM capacity to its strategic objectives and the 2028 closure timeline.
Stage 1 of 7
This document represents Stage 1 — Initial Intelligence and Engagement. Carbotura's engagement model runs through Letter of Intent (Stage 2), Feasibility Assessment (Stage 3), Community Engagement (Stage 4), Agreement & Financing (Stage 5), Permitting & Construction (Stage 6), and Operations & Royalties (Stage 7).
About Advanced Circular Manufacturing & Technology
Advanced Circular Manufacturing (ACM) is Carbotura's proprietary manufacturing process that converts mixed community-sourced feedstock into RevCon™ engineered products. It is not incineration, not recycling, and not a waste-to-energy facility.
ACM Output Products — RevCon™ 3 Baseline
| RevCon™ Output | Description | Application |
|---|---|---|
| Liquifact™ | Liquid reformate product derived from the ACM molecular reforming process | Industrial fuel feedstock; chemical processing inputs |
| Manufactured Mineral Aggregate | Solid reformed material — engineered to specification | Civil engineering; road base; construction aggregate |
| Renewable Graphite | Carbon-based ACM output product (not raw graphene/carbon black) | Industrial carbon applications |
| Renewable Refined Water | Water output processed to specification during ACM reforming | Industrial process water; potential potable (subject to regulation) |
| Recovered Thermal Energy / Recovered Electrical Energy | Energy output from ACM process | On-site energy use; potential grid supply |
| Circular Royalty™ | Community revenue share — begins 13 months after first feedstock delivery | Community benefit; Solid Waste Special Fund or designated use |
All RevCon™ outputs are engineered manufacturing products — not recycled materials, not byproducts, and not residuals. All output volume and specification claims use qualifying language: "designed for," "engineered to achieve," and "configured to" — reflecting process design specifications ahead of full commercial verification at Oʻahu scale.
TMC Fee — Technology & Manufacturing Contribution
Technology & Manufacturing Contribution (TMC) Fee — First Use Definition
Note: The TMC Fee is NOT a tipping fee, gate fee, or disposal fee. It is the Technology & Manufacturing Contribution — the community's participation in a manufacturing partnership, not payment for waste disposal services.
Three-Tier Build Plan
Carbotura proposes three facility capacity tiers for Oʻahu, allowing the City & County of Honolulu to select the scale that matches its 2028 infrastructure requirements and strategic objectives.
| Tier | Capacity | Annual Feedstock | TMC Fee/yr | Circular Royalty™ Year 2 | 30-yr Benefit | Conf. |
|---|---|---|---|---|---|---|
| Minimum | 400 TPD | 146,000 t | $21.9M | ~$2.92M | ~$193M | LOW |
| Tier 1 | 1,000 TPD | 365,000 t | $54.75M | ~$9.13M | ~$545M | LOW |
| Tier 2 | 2,000 TPD | 730,000 t | $109.5M | ~$21.9M | ~$1.195B | LOW |
All figures based on Carbotura standard deployment model applied to Oʻahu data. Carry LOW confidence. Independent review required before decision. Circular Royalty™ begins 13 months after first feedstock delivery — not "Year 2" alone; this precise language governs all timing statements.
Strategic Tier Guidance for Oʻahu
400 TPD — Minimum Tier
Appropriate as a proof-of-partnership deployment. Does not solve the 2028 capacity crisis at scale but establishes the ACM relationship and begins Circular Royalty™ accrual. Diverts ~12.2% of Oʻahu's MSW stream.
1,000 TPD — Tier 1
Addresses approximately one-third of Oʻahu's MSW stream. Materially reduces WGSL intake, extends landfill runway, and delivers a 30-year benefit of ~$545M (~$18.79/resident/year from Year 2).
2,000 TPD — Tier 2
Processes ~60% of Oʻahu's MSW stream — substantially eliminating the need for the full-scale Wahiawā replacement landfill and delivering ~$1.195B in 30-year combined benefit (~$41.21/resident/year from Year 2).
Financial Comparison
Direct financial comparison of the status quo trajectory versus ACM deployment at each tier, over a 10-year horizon. All figures illustrative estimates. LOW
| Financial Line | Status Quo (10 yr) | ACM 400 TPD (10 yr) | ACM 1,000 TPD (10 yr) | ACM 2,000 TPD (10 yr) |
|---|---|---|---|---|
| Disposal / TMC Fee expenditure | ~$240.9M est. | $219M | $547.5M | $1,095M |
| New landfill capital cost | ~$300M+ est. | ~$250M (partial reduction) | ~$150M est. | ~$50M est. |
| WGSL closure + post-closure | ~$75M est. | ~$75M (same) | ~$50M (reduced) | ~$30M (reduced) |
| Circular Royalty™ received | $0 | ~$32M (Yrs 2–10) | ~$100M (Yrs 2–10) | ~$239M (Yrs 2–10) |
| Net 10-yr position vs. status quo | Baseline $0 | ~+$55M better est. | ~+$60M better est. | ~+$210M better est. |
All comparative figures are illustrative analyst estimates carrying LOW confidence. Status quo disposal cost estimated at $165/ton. ACM 1,000 and 2,000 TPD tiers cover feedstock beyond the current waste stream for SQ comparison purposes — the full city disposal budget for those stream volumes is captured. Independent financial review is required.
Community Returns — 30-Year Projection
The 30-year combined benefit figures below represent the projected Circular Royalty™ plus annual cost savings over the full partnership term, based on Carbotura's Business Baseline (50% of current market pricing for RevCon™ outputs) with 4% compound annual growth. All figures carry LOW confidence and are illustrative estimates produced by an interested party. Independent review is required before reliance.
| Tier | TPD | 30-yr Combined Benefit | Per-Resident Total | Per-Resident/Year (Yrs 2–30) | Circular Royalty™ Year 2 | Conf. |
|---|---|---|---|---|---|---|
| Minimum | 400 | ~$193M | ~$193/resident | ~$6.66/resident/yr | ~$2.92M | LOW |
| Tier 1 | 1,000 | ~$545M | ~$545/resident | ~$18.79/resident/yr | ~$9.13M | LOW |
| Tier 2 | 2,000 | ~$1.195B | ~$1,195/resident | ~$41.21/resident/yr | ~$21.9M | LOW |
Per-resident/year formula: [30-yr combined benefit] ÷ [1,000,000 residents] ÷ 29 (Years 2–30). Circular Royalty™ begins 13 months after first feedstock delivery. 30-yr compound growth at 4% pa applied to Business Baseline (50% of current market pricing for RevCon™ outputs). All figures LOW confidence — illustrative estimates by Carbotura Inc.
Next Steps & Accountability Pathways
Carbotura's proposed immediate next steps are a Letter of Intent (Stage 2), followed by a Feasibility and Site Assessment (Stage 3). The engagement timeline below shows where the proposal currently stands.
Key Decision Points for Oʻahu
| Decision Point | Deadline / Timeline | Decision-Maker | Implications |
|---|---|---|---|
| WGSL closure compliance | March 2, 2028 (binding) | City & County of Honolulu / LUC | All alternative disposal solutions must be in place or contracted by this date |
| Wahiawā replacement landfill — permit initiation | 2026 (to have any chance of 2028+ opening) | City ENV / Hawaii DOH SWS / LUC | Delay increases the probability of a capacity gap from 2028 |
| Letter of Intent — ACM partnership | Q2–Q3 2026 (recommended) | City Mayor / City Council | Initiates Stage 2 feasibility; no financial commitment at this stage |
| FY2026 Budget Cycle | March–June 2026 | Honolulu City Council | Opportunity to include waste infrastructure alternatives in budget deliberations |
| ISWMP Interim Report | Mid-2025 (now overdue) | City ENV | Updated integrated waste management plan; key policy document for any technology decision |
| H-POWER contract renewal window | TBD — contract term not publicly disclosed | City ENV | Contract renewal represents the key window to introduce ACM as a complementary or replacement technology |
Contacts & Accountability Pathways
For document corrections, factual disputes, media enquiries, or to request independent source documentation:
Named organisations and individuals who believe any claim in this document is inaccurate may request correction. Carbotura responds within 10 working days. Corrections are published with a visible dated notice, not silently edited.
Residents wishing to raise questions about Oʻahu's waste strategy with responsible officials:
- Mayor, City & County of Honolulu — honolulu.gov/mayor
- Dept. of Environmental Services (ENV) — (808) 768-3200
- Honolulu City Council — honolulucitycouncil.org
- ENV Director (Solid Waste) — honolulu.gov/env
- Hawaii DOH Solid Waste Section — health.hawaii.gov/shwb
- State Land Use Commission — luc.hawaii.gov
- Office of the City Auditor — honolulu.gov/oca
- UIPA / FOI Requests (HRS Chapter 92F) — via City Clerk or relevant department
Model FOI request template for H-POWER and WGSL operating contracts available from transparency@carbotura.com
- WGSL Closure Deadline — March 2, 2028 (binding)
- FY2026 Budget Cycle — March–June 2026
- Wahiawā Landfill Permitting Initiation — 2026 (recommended)
- ISWMP Interim Report — Mid-2025 (overdue as of March 2026)
P&L Summary — All Tiers (Illustrative)
Projected P&L across all three tiers for Years 1–5 and Year 30 (terminal year). All figures LOW confidence — Carbotura standard deployment model. Business Baseline = 50% of current RevCon™ market pricing. 4% pa compound growth.
| Line Item | 400 TPD Yr 1 | 400 TPD Yr 2 | 400 TPD Yr 5 | 1,000 TPD Yr 2 | 2,000 TPD Yr 2 |
|---|---|---|---|---|---|
| TMC Fee revenue (to community) | $21.9M | $21.9M | $21.9M | $54.75M | $109.5M |
| Circular Royalty™ received | $0 (pre-Year 2) | ~$2.92M | ~$3.55M | ~$9.13M | ~$21.9M |
| Cost saving vs. estimated $165/t FWDC | ~$2.19M | ~$2.19M | ~$2.19M | ~$5.48M | ~$10.95M |
| Net community benefit (saving + Royalty) | ~$2.19M | ~$5.11M | ~$5.74M | ~$14.61M | ~$32.85M |
| 30-yr combined benefit (all years) | ~$193M (400 TPD) | ~$545M (1,000 TPD) | ~$1.195B (2,000 TPD) | ||
Circular Royalty™ growth: 4% pa compounded from Business Baseline (Year 2). TMC Fee held constant (no escalation shown — actual escalation TBD in Circular Offtake Agreement). All figures LOW — illustrative estimates.
Balance Sheet Impact Summary (Illustrative)
| Balance Sheet Item | Status Quo | ACM 400 TPD | ACM 2,000 TPD | Conf. |
|---|---|---|---|---|
| New landfill GO bond requirement | ~$300M (est.) | ~$250M (slight reduction) | ~$50–100M (major reduction) | LOW |
| WGSL closure accrual (GASB) | ~$50–150M unfunded | Same | Same (closure still required) | LOW |
| Circular Royalty™ receivable (Year 2+) | $0 | ~$2.92M/yr growing | ~$21.9M/yr growing | LOW |
| PFAS contingent liability | Unknown; not accrued | Reduced (less ash to landfill) | Substantially reduced at Tier 2 | LOW |
| GO bond headroom impact | Constrained by $859M HART reimbursable debt | Improved (less capital landfill need) | Materially improved at Tier 2 | LOW |
HART reimbursable GO debt: ~$859M outstanding. S&P Global 2025 All ACM balance sheet figures LOW. Independent GASB and legal review required.
Cash Flow Projection (Illustrative)
| Year | 400 TPD — Net Annual Cash Flow | 1,000 TPD — Net Annual Cash Flow | 2,000 TPD — Net Annual Cash Flow |
|---|---|---|---|
| Year 1 (TMC Fee payments commence) | −$21.9M (TMC Fee) + $2.19M (saving) = net −$19.71M | −$54.75M + $5.48M = net −$49.27M | −$109.5M + $10.95M = net −$98.55M |
| Year 2 (Circular Royalty™ begins — 13 months post first delivery) | +$2.92M CR + $2.19M saving = +$5.11M | +$9.13M CR + $5.48M saving = +$14.61M | +$21.9M CR + $10.95M saving = +$32.85M |
| Year 10 | ~+$7.4M (CR grown at 4% pa) | ~+$23.3M | ~+$55.8M |
| Year 20 | ~+$11.1M | ~+$34.7M | ~+$83.2M |
| Year 30 | ~+$16.5M | ~+$51.5M | ~+$123.1M |
Net cash flow = Circular Royalty™ + annual disposal cost saving. Does not include avoided capital expenditure. Circular Royalty™ begins 13 months after first feedstock delivery — shown as Year 2 for modelling purposes. All figures LOW.
Tier Comparison Matrix
| Factor | 400 TPD | 1,000 TPD | 2,000 TPD |
|---|---|---|---|
| % Oʻahu MSW addressed | ~12% | ~30% | ~61% |
| Ash disposal problem addressed | Partially | Substantially | Almost fully |
| WGSL runway extended | Modestly | Significantly | Substantially |
| New landfill scale requirement | Slightly reduced | Materially reduced | Potentially minimal (contingency only) |
| 30-yr combined benefit | ~$193M | ~$545M | ~$1.195B |
| Per-resident/yr (Yrs 2–30) | ~$6.66 | ~$18.79 | ~$41.21 |
| Strategic risk mitigation | Low — doesn't solve 2028 at scale | Medium — significant but not complete | High — near-complete solution to capacity crisis |
| Carbotura recommendation | Proof-of-partnership | Balanced solution | Recommended for maximum impact |
Glossary of Key Terms
| Term | Definition |
|---|---|
| Advanced Circular Manufacturing (ACM) | Carbotura's proprietary manufacturing process that converts community-sourced feedstock into RevCon™ engineered products through molecular reforming. Not incineration, recycling, or WTE. |
| Community-Sourced Feedstock | The mixed material stream delivered by the community to the ACM facility. Not "waste," "garbage," or "refuse" — these terms are prohibited in ACM context. The feedstock is the manufacturing input. |
| Circular Offtake Agreement | The legal instrument governing the ACM partnership — replacing what a waste management company would call a waste disposal contract. Governs feedstock delivery, TMC Fee, Circular Royalty™, and term. |
| Circular Royalty™ | Carbotura's trademark term for the community revenue share — the portion of RevCon™ manufacturing revenue returned to the community under the Circular Offtake Agreement. Begins 13 months after first feedstock delivery. Not a rebate, dividend, or rebate. |
| FWDC | Facility-Weighted Disposal Cost — the weighted-average all-in cost per ton paid by the city to dispose of community-sourced material across all current disposal facilities. The benchmark against which the TMC Fee is calibrated. |
| Liquifact™ | Carbotura trademark for the liquid reformate product produced by the ACM molecular reforming process. |
| OmniCrude™ | Carbotura trademark for pre-treated / processed feedstock at an intermediate stage of the ACM process. |
| Recyclotron™ reactor | Carbotura trademark for the ACM processing unit — never called an incinerator, combustion unit, or burner. Uses electromagnetic energy in an anoxic environment. No combustion occurs. |
| RevCon™ | Carbotura trademark for the manufactured product output category from ACM processing. RevCon™ products include Liquifact™, manufactured mineral aggregate, Renewable Graphite, and Renewable Refined Water. |
| TMC Fee | Technology & Manufacturing Contribution Fee — the community's payment to the ACM facility per ton of feedstock delivered. Not a tipping fee, gate fee, or disposal fee. Formula: MAX($100, MIN($150, FWDC−$5)). |
| WGSL | Waimanalo Gulch Sanitary Landfill — Oʻahu's only municipal solid waste landfill, operated by Waste Management of Hawai'i Inc. under city contract. Ordered to close by March 2, 2028 (LUC Order SP09-403). |
| H-POWER | Honolulu Program of Waste Energy Recovery — the city-owned WTE/incineration facility at Campbell Industrial Park, operated by Reworld Honolulu LLC. Processes approximately 2,000 TPD of combustible MSW. |
| Feedstock Haulers | ACM term (capitalised) for the collection and transportation operators delivering community-sourced feedstock to the ACM facility. Equivalent to legacy garbage truck / waste hauler roles but framed within manufacturing supply chain. |
| Atmospheric Protection System (APES) | Carbotura trademark for the air quality and emissions management system integrated into the ACM facility. Not to be called "pollution controls" or "scrubbers." |
Source Bibliography
All primary sources used in this document are listed below with sufficient detail for independent retrieval. Where documents are not publicly available online, the issuing body, date, and formal title are provided to enable a Freedom of Information or Environmental Information request under Hawaii's Uniform Information Practices Act (HRS Chapter 92F). Secondary sources are identified as such.
| # | Source Title | Issuing Body | Date | Type | Access / Notes |
|---|---|---|---|---|---|
| 1 | LUC Order, Docket SP09-403 (WGSL Closure) | State Land Use Commission, Hawaii | November 2019 | Primary — regulatory order | luc.hawaii.gov; publicly available |
| 2 | Hawaii Revised Statutes Chapter 342G | Hawaii State Legislature | 1991 (as amended 2024) | Primary — statute | capitol.hawaii.gov; publicly available |
| 3 | Oʻahu Solid Waste Generation Rates and Data 2019–2023 | City & County of Honolulu Dept. of Environmental Services | 2024 | Primary — official statistics | honolulu.gov/env/ref/res-rates-and-data; publicly available |
| 4 | New Landfill Siting — Area 3 Site 2 Announcement | City & County of Honolulu ENV | December 2024 | Primary — government policy | honolulu.gov/env/ref/new-landfill-siting; publicly available |
| 5 | WGSL Public Hearing Meeting Notes | City & County of Honolulu ENV | January 2025 | Primary — official record | honolulu.gov/env; PDF published March 2025 |
| 6 | WGSL Status Page | City & County of Honolulu ENV | 2024 | Primary — official statistics | honolulu.gov/env/ref/res-landfill-status |
| 7 | Future Plans — Waste-to-Energy and Diversion | City & County of Honolulu ENV | 2024 | Primary — government policy | honolulu.gov/env/ref/future-plans |
| 8 | Annual Report to the 32nd Legislature — Solid Waste | Hawaii Dept. of Health, Office of Solid Waste Management | 2024 | Primary — official statistics | health.hawaii.gov/opppd; PDF publicly available |
| 9 | Annual Report to the 28th Legislature — Solid Waste | Hawaii Dept. of Health, OSWM | 2016 | Primary — official statistics | health.hawaii.gov/shwb; PDF publicly available |
| 10 | ROH Chapter 9 / §42-4.2 — Disposal charges for businesses | City & County of Honolulu | Ongoing | Primary — ordinance | codelibrary.amlegal.com/codes/honolulu; publicly available |
| 11 | H-POWER Plant Profile (46–73 MW, Campbell Industrial Park) | Hawaiian Electric Company | 2024 | Primary — utility filing | hawaiianelectric.com; publicly available |
| 12 | City & County of Honolulu, Series 2025 GO Bonds — AA+ Rating (Stable) | S&P Global Ratings | August 2025 | Primary — rating agency report | honolulu.gov/bfs/wp-content/uploads/sites/62/2025/08/SP.pdf |
| 13 | Hawaii Ratings — GO Bonds, Aa2 Affirmed | Moody's Ratings | November 2024 | Primary — rating agency report | investorrelations.hawaii.gov; PDF publicly available |
| 14 | "Could Hawaii Be the First State to Dump Landfills?" | Honolulu Civil Beat | February 2026 | Secondary — trade/news media | civilbeat.org; publicly available |
| 15 | "City Spared from Paying a Hefty Price for Lack of Trash" | Honolulu Civil Beat | May 2020 | Secondary — trade/news media | civilbeat.org; H-POWER $91/t commercial rate referenced |
| 16 | "Officials Are Grappling with Where to Put Oahu's Next Landfill" | Hawaii Public Radio | August 2024 | Secondary — news media | hawaiipublicradio.org; publicly available |
| 17 | Hawaii HB895 — Organic Waste Diversion Goals (2024 Session) | Hawaii State Legislature | 2024 | Primary — legislative bill | legiscan.com/HI; publicly available |
| 18 | Act 73 (2020) — Waste facility buffer zone requirements | Hawaii State Legislature | 2020 | Primary — statute | capitol.hawaii.gov; publicly available |
| 19 | Analysis of MSW Landfill Tipping Fees 2024 | Environmental Research & Education Foundation (EREF) | 2025 | Primary — industry survey | erefdn.org; summary at wasteoptima.com |
| 20 | "The Economics of Recycling in Hawaii" | Hawaii Business Magazine | 2021 | Secondary — trade press | hawaiibusiness.com; publicly available |
| 21 | Carbotura ACM Industry Nomenclature Proofing Guide v3.7 | Carbotura Inc. | 2026 | Primary — Carbotura internal specification | Available on request: transparency@carbotura.com |
| 22 | Carbotura Community Transparency Standards v1.0 | Carbotura Inc. | 2026 | Primary — Carbotura internal specification | Available on request: transparency@carbotura.com |
| 23 | City & County of Honolulu ACFR FY2025 | City & County of Honolulu Dept. of Budget and Fiscal Services | 2026 | Primary — statutory accounts | honolulu.gov/bfs; publicly available |
| 24 | Oahu Landfill Siting Study & LAC Recommendations Final Report | City & County of Honolulu ENV | 2022 | Primary — government report | honolulu.gov/env; linked from New Landfill Siting page |