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Re-assessment pendingGSOtherSwitzerlandRegistry: Registered

GS11623 GS11627 RVPA-12 CO2 Sequestration at a Swiss Concrete Recycler using the Neustark Technology

Developer: Neustark AG

GS-4546 ↗ · current registry ID: GS12335

Worked comparison example (English)

#23of 27 in Switzerland#1625of 2176 in Gold Standard (GS)

Score from methodology v2.1 (analysis of 2 Sep 2026). Re-assessment under v2.2 pending.

Assessment

CarbonMeld document-based assessment

01020304 Overall 4.7 / 10
Integrity 🔒 Transparency 🔒 Claim Safety 🔒 Documentation 🔒
Dimension scores are locked — the faint arcs are empty tracks, not zero scores.

Scale 0–10 · method weights: integrity 35% · transparency 25% · claim safety 25% · documentation 15%.

Re-assessment pending · v2.1

Scored2026-09-02medium confidence

evidence: 17/26 registry documents analyzed · 4 red flags

Generated by CarbonMeld Analysis Pipeline · Methodology · Editorial Policy · About the System
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How this analysis was made

Standard
Gold Standard (GS) How CarbonMeld reads projects of this standard
Methodology
Carbon Sequestration through accelerated carbonation of concrete aggregate No methodology-specific rules: the general rules apply. Read the general rules
Our method
CarbonMeld methodology v2.1 · analysed on 2 Sep 2026 · 17/26 registry documents analyzed · re-assessment under v2.2 pending

Analysis

A Swiss concrete-recycling carbonation project (Neustark technology) with VVB-confirmed additionality and no reported reversals, but significant data gaps around leakage quantification, FNRB, and buffer-pool provisions. Multiple contradictions across documents—particularly an 8× discrepancy in claimed ERR and a grid emission factor mismatch—undermine confidence in the verified figures. The low extraction confidence and methodology version 1.0 further limit the reliability of the available evidence.

Red Flags

4 red flags detected — Unlock with Premium

Findings

Risk Indicators

Additionality

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Permanence

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Leakage

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Baseline

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Safeguards

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Double-claim

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Risk indicator details are a Premium feature

Score Breakdown

Score factors per dimension are a Premium feature — Unlock with Premium

Gates applied

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Detailed Analysis

The detailed per-dimension analysis is a Premium feature — Unlock with Premium

Evidence

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On this page: the analysis of 2 Sep 2026, marked “Re-assessment pending”. Per-dimension scores, risk indicators, 4 red flags, score factors, detailed analysis, and 26 registry documents (17 analyzed).

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Eligibility & market

What can you claim with this credit?

Four checks buyers ask about, from the registry and the Integrity Council (ICVCM).

  • Airlines (CORSIA)

    No CORSIA label on the registry

    Not usable for airlines' CORSIA obligations.

    Source: registry label · read on 2 Nov 2026

    Covers: this project's credit records as read on the registry

  • Integrity label (ICVCM CCP)

    No ICVCM information

    No CCP label and no ICVCM decision found for this project's methodology.

  • Removal or reduction

    Carbon removal

    Takes CO₂ out of the atmosphere — the only type that can neutralise residual emissions in an SBTi net-zero claim.

    Source: registry label · read on 2 Nov 2026

    Covers: the project type, not a label on individual credits

  • Paris Agreement (Article 6)

    Not published

    This registry does not publish Article 6 authorizations.

Information only, from public sources. Claim rules (CORSIA, SBTi, EU rules on green claims) change: check them before making a public claim. Since 27 September 2026, EU consumer rules do not allow “climate neutral” product claims based on offsets.

Registry labels last checked:2026-11-02

Credit Vintages

IssuedRetiredAvailable
2024
995742
Total995742

Retired by

Organisations named as beneficiaries in the registry's public retirement records.

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Profile & governance

Methodology·Editorial Policy·About the System

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