This document describes how SymbioFlows waste valorization assessments are produced. An assessment identifies the recoverable waste streams at an industrial facility, classifies each stream against the European waste classification framework, and assigns a qualitative recovery tier reflecting the maturity and accessibility of established recovery routes.

The assessment is deliberately scoped to classification and recovery potential. Ranked receiver matching, regulatory compliance screening, and freight modelling are performed by the full SymbioFlows matching engine under a commercial engagement and are outside the scope of this document.

Assessments draw on the following published sources:

• EU List of Waste — Commission Decision 2000/532/EC as amended by Decision 2014/955/EU. All six-digit waste codes referenced in an assessment are sourced from the consolidated official list (842 entries), including absolute and mirror hazardous entries.
• Waste Framework Directive — Directive 2008/98/EC, in particular the Annex II recovery operations (R1–R13) used to characterize recovery routes, and the waste hierarchy used to order them.
• Hazard property framework — Commission Regulation (EU) No 1357/2014 (hazard properties HP1–HP15) for the interpretation of hazardous entries and mirror-entry boundaries.
• Published industry benchmarks — sector-level waste arisings and typical material-recovery rates from publicly available industry and regulatory publications, used to cross-check declared volumes for plausibility.

Each declared waste stream passes through the following sequence:

1. Stream identification. The facility's declared process steps and waste arisings are decomposed into discrete streams. Streams below a materiality threshold are recorded but not assessed.
2. EWC classification. Each stream is mapped to a six-digit code in the EU List of Waste, resolving chapter (source activity), sub-chapter (process), and entry. Mirror entries are flagged where hazard status depends on composition.
3. Physical and compositional profiling. The stream's physical state, dominant material fraction, and known contaminants are recorded from declared data and sector norms.
4. Benchmark cross-check. Declared volumes are compared against published sector benchmarks; material deviations are flagged in the assessment rather than silently adjusted.

Each classified stream is assigned one of four qualitative tiers. Tiers are a function of the existence and maturity of recovery operations (Annex II R-codes) applicable to the stream, the concentration of the recoverable fraction, contamination risk, and the maturity of the receiving market.

Tier assignments are qualitative by design. The assessment does not attach monetary values to individual streams; valuation requires composition confirmation and receiver-side pricing, which sit with the full engine engagement.

The assessment is a desk-based analysis and carries the following limitations:

• It is produced from declared data and sector norms. No site sampling, laboratory analysis, or physical audit is performed.
• Tier assignments for mirror entries are indicative pending compositional confirmation of hazard status.
• EWC codes stated in the assessment support classification discussion; they do not constitute a regulatory waste classification, consignment documentation, or duty-of-care transfer paperwork.
• The assessment is not an offer to broker, purchase, or accept any waste stream, and contains no receiver identities or commercial terms.

The exhibit below is a complete assessment rendered in the delivered format, populated with representative data for an anonymized mid-size metal surface-treatment facility. Stream volumes, codes, and tier assignments are illustrative of a typical engagement in this sector.