Inherited Confidence Classifications

The following confidence classifications are inherited directly from the Waste Study and Proposal. No values have been independently derived for this report. All State B figures trace exclusively to the Proposal EIR Input Block.

§1 — Introduction and Decision Summary

§1.1 — What This Report Measures

This Economic Impact Report (EIR) is a delta model. It measures the difference between two defined states:

• State A (Current System): The Ibeju-Lekki Corridor continues under the existing Lagos State waste management regime — LAWMA PSP collection, long-haul diversion to Olusosun/Ojota, escalating disposal costs, no local recovery infrastructure. State A is drawn from the Waste Study. It is not re-diagnosed here.
• State B (With Carbotura): The corridor's feedstock is delivered to a Carbotura ACM facility within the LFTZ South/West Quadrant, under a 30-year COA. State B parameters are drawn exclusively from the Proposal EIR Input Block. No new values are introduced.

§1.2 — Decision Summary Table

§1.3 — Fiscal vs. Regional Economic Separation

§2 — State A Baseline

§2.1 — Feedstock Volume and Disposition

§2.2 — State A Cost Structure

§2.3 — State A Cost Trajectory

Three confirmed escalation mechanisms operate concurrently in State A. First, PSP operator rates have documented 200% increases over the 2022–2023 period as diesel, spare parts, and vehicle costs in NGN/USD terms compound. Second, the capital investment needed to sustain even 30% corridor collection coverage (800+ additional trucks at ~N75M each) represents a multi-billion naira unfunded requirement. Third, the closure of all three nearest disposal sites (Epe closed; Olusosun and Solous III in formal decommissioning) eliminates short-haul disposal options and entrenches the Ojota diversion cost — adding an estimated $4–6/ton to long-haul transport costs. State A's effective FWDC is on a trajectory toward $20–25/ton within the study horizon if current trends continue.

§2.4 — State A Environmental and Structural Position

Under State A, 70% of corridor waste — approximately 931 TPD — flows untreated into drains, canals, and Lagos Lagoon. The waste sector accounts for 25.3% of Lagos State's total GHG emissions. The corridor's water supply deficit (Lagos needs 700M+ gallons/day; LSWC produces under 200M gallons/day) is unaddressed. The corridor's energy deficit (Lagos receives ~4,000 MW vs. 9,000 MW needed) continues. State A provides no structural remedy to any of these three concurrent infrastructure deficits.

§3 — State B Deployment Baseline

§3.1 — Inherited Flags from Proposal

All State B values in this section are drawn exclusively from the Proposal EIR Input Block. Confidence classifications are propagated unchanged. The FWDC planning basis ($14/ton ESTIMATED) is the primary data gap affecting all State A comparison figures.

§3.2 — Deployment Configuration

§3.3 — Economic Terms

§3.4 — Residual Obligations

Feedstock delivered beyond ACM intake capacity in Phase Initial (volumes above 400 TPD) continues to be managed under existing LAWMA arrangements at the prevailing FWDC until Phase Medium reaches COD. No take-or-pay obligation exists for Lagos State on volumes not yet addressed by a commissioned phase.

§3.5 — Timeline Anchoring

T0 = Community Feasibility Study completion. Phase Initial COD = T0 + 24 months. First Circular Royalty payment = T0 + 37 months (13 months after Phase Initial COD). These are Carbotura standard deployment schedule milestones.

§3.6 — Phase Delta Map

State A infrastructure (current system — steel/grey and amber tones) vs. State B ACM Priority 1 site (Emerald). The geographic shift from dispersed, deteriorating disposal infrastructure to a single integrated ACM facility within the LFTZ.

§4 — Delta Analysis

§4.1 — Three Delta Components

The net fiscal delta between State A and State B comprises exactly three components, each quantified separately:

1. Gross Cost Displacement: The reduction in Lagos State's waste disposal spending attributable to substituting current FWDC-priced disposal with the ACM TMC Fee. At $14/ton FWDC vs. $22/ton TMC, the gross cost displacement is negative in Year 1 (TMC exceeds FWDC by $8/ton). This reflects the premium paid for superior logistics, on-site processing, and integrated infrastructure benefits. Note: Gross cost displacement is quantified separately from Circular Royalty cash flow. Full net fiscal position reflects both.
2. Circular Royalty Cash Flow: Beginning 13 months after the first TMC Fee payment, the Circular Royalty (120% × TMC, +1pp/year) flows to Lagos State. From Year 2 onward, this exceeds the annual TMC obligation, creating a net positive fiscal position. At steady state, the Circular Royalty is designed to exceed the TMC Fee on a per-ton basis.
3. Residual Obligation: Feedstock not captured by the current ACM phase continues under existing LAWMA disposal arrangements at FWDC cost. This diminishes to zero as successive phases reach COD through Phase Expanded (T0 + 60 months). Net residual cost is quantified in §4.2.

§4.2 — Phase-by-Phase Comparative Table

§4.4 — 30-Year Gross Cost Displacement (Phase Initial)

Gross cost displacement = State A FWDC annual cost − State B TMC Fee annual cost. Negative in early years (TMC exceeds FWDC); royalty cash flow is separate and shown in §4.5.

Gross cost displacement is negative throughout because TMC ($22/ton) exceeds FWDC ($14/ton). This reflects the premium paid for ACM's integrated logistics, on-site processing, and superior value chain. The royalty (§4.5) more than compensates from Year 2. State A FWDC projections assume 3%/year escalation from base. Source type: ESTIMATED for State A trajectory; MODELLED for State B TMC.

§4.5 — 30-Year Circular Royalty Table (Phase Initial)

§5 — System-Level Impact

§5.1 — Employment Delta

§5.2 — Environmental Delta

The following figures reflect designed performance at rated capacity. Actual performance is subject to feedstock composition variability and operational ramp-up. The ACM facility is designed for these outcomes.

§5.3 — PFAS and Persistent Contamination Delta

The Lagos Lagoon and surrounding waterways receive an estimated 931 TPD of untreated waste under State A, including plastics, PFAS-containing materials, and industrial chemicals from LFTZ sources. ACM processes and thermally converts PFAS-containing streams, eliminating their entry into the lagoon system. State B's full corridor capture eliminates this pathway entirely by Phase Expanded. No equivalent mitigation exists in State A.

§5.4 — No-Fallback Analysis

There is no equivalent alternative to State B for the Ibeju-Lekki Corridor within the study horizon. The Harvest Waste Consortium WTE at Epe is designed for Lagos Mainland feedstock at 2,250 TPD — it is not a corridor-specific solution and requires PSP operators to continue long-haul diversions. The LAWMA MRF programme at Ikorodu is planned but not funded or under construction as of March 2026. State A has no contracted structural alternative to the disposal capacity gap created by Olusosun and Solous III decommissioning. State B is the only proposal with confirmed NEPZA pathway, LFTZ site, and sovereign guarantee precedent.

§6 — Risk and Sensitivity

§6.1 — Risk Register

§6.2 — Feedstock Variability ±20%

Net position remains positive at Year 2 under all ±20% feedstock scenarios. The royalty structure is not volume-sensitive at Phase Initial scale because the immediate feedstock availability (795 TPD) significantly exceeds Phase Initial requirement (400 TPD).

§6.3 — FWDC Sensitivity — Sign-Change Threshold

The FWDC sign-change threshold (where State B Year 1 is also cost-positive vs. State A) is at FWDC = $22/ton — identical to the TMC Fee. State A's documented FWDC trajectory (see §2.3) is directionally toward this threshold within 5–7 years. Year 2+ net position is independent of FWDC because the royalty is calculated on TMC Fee, not FWDC.

§6.4 — Royalty Escalator Sensitivity

At 0 pp escalation (no royalty rate growth), the net position is still positive from Year 2 through Year 30. The +1pp/year locked default provides material upside vs. the zero-escalation floor.

§6.5 — Timeline Slippage (T0 Delays)

§7 — Decision Window Analysis

§7.1 — Binding Constraints

Two binding constraints define the procurement decision window:

Constraint 1 — Disposal infrastructure collapse: Olusosun and Solous III are in formal 18-month decommissioning from December 2024. Epe landfill is already closed. The replacement network (Ikorodu MRF, Badagry, Epe WTE) is not yet built. The corridor has no contracted local disposal alternative from mid-2026 onward. Every month without a signed COA is a month in which corridor PSP operators have no destination, increasing illegal dumping and system cost.

Constraint 2 — Royalty compound timing: Each quarter of authorization delay defers Phase Initial COD by one quarter and defers the entire royalty stream by the same period. The 30-year royalty curve means each quarter of delay costs approximately $960,000 in deferred Year 2–5 royalties and $3.84M over the first delayed year of royalty flow.

§7.2 — Decision Window Table

§7.3 — Irreversibility Mechanism

§7.4 — Optionality Matrix

§8 — Net Effects Summary

§8.1 — Fiscal Net Effects (Direct Lagos State)

§8.2 — Regional Economic Net Effects

DISCLAIMER: These figures represent regional economic activity, not Lagos State fiscal receipts. They are not additive to the fiscal table above.

§8.3 — Environmental Net Effects

DISCLAIMER: Figures below are designed-performance basis. Actual outcomes subject to feedstock composition and operational ramp-up.

§8.4 — Structural Net Effects

Under State B, the Ibeju-Lekki Corridor moves from a position of structural disposal crisis (three nearest sites closed or closing, no contracted local alternative) to a fully integrated circular economy node within Nigeria's highest-incentive industrial zone. The ACM facility creates an addressable feedstock contract for LAWMA's PSP operator network — providing a local destination that eliminates the Ojota diversion and reduces PSP operator costs. The LFTZ NEPZA status provides institutional protection against the regulatory and currency risks that characterize State A's cost trajectory. The combination of assured disposal, energy self-sufficiency (solar), water recovery, and product export revenue makes State B structurally resilient in ways State A cannot replicate.

§8.5 — Unresolved Data Gaps

Appendix A — Sources and Methodology

FWDC derivation: Mid-point of documented PSP operator cost range ($11–17/ton) from Business Day Nigeria survey (August 2023) and LAWMA gate fee public data. Planning basis $14/ton. Classified ESTIMATED.

TMC Fee formula: $22/ton is the Registry-locked value, modelled as a 57% premium above the $14/ton FWDC planning basis. Escalator: 2.5%/year (Carbotura standard).

Phase sizing: 400 / 800 / 1,330 TPD as defined by project brief (30% / 60% / 100% of 1,330 TPD researched corridor volume).

Royalty formula: Royalty(m+13) = TMC(m) × Royalty_Rate(m). Base 120%, +1pp/year. All royalty calculations are deterministic from this locked formula.

Environmental performance basis: Carbon avoided: 216 tCO₂e/TPD/year (Carbotura standard parameter). Water recovery: 3,650 gallons/TPD/day. Hydrogen: 0.012 t H₂/TPD/day. Classified BASELINE.

Employment basis: 0.71 FTE/TPD direct (Carbotura standard). 2× indirect multiplier (Nigerian industrial context). Annual economic impact: $96,250/direct FTE/year. Classified ESTIMATED.

Timeline basis: Carbotura standard deployment schedule. T0 = CFS completion.

State A infrastructure data: LAWMA official statements (Dr. Gbadegesin, Dec 2025); Guardian NG and Daily Post Nigeria (Oct–Dec 2024) for closure orders; Preprints.org landfill flow analysis (Oct 2025).

Appendix B — Glossary Additions

Appendix C — Evidence Chain