CO2 Sequestration at a German Concrete Recycler using the Neustark Technology

Audit Analysis

This Gold Standard project sequesters CO₂ through accelerated carbonation of concrete aggregate at a German recycler, using a novel methodology (v1.0). While additionality is VVB-confirmed and leakage is quantified, the absence of a buffer pool for a sequestration project, a very short crediting period (~7 months), multiple open corrective actions, and significant contradictions across monitoring reports undermine confidence in the integrity and permanence of the claimed credits.

Project Description

Red Flags

• ⚠No buffer pool percentage stated for a carbon sequestration project, leaving permanence risk unmitigated
• ⚠Crediting period spans only ~7 months (2023-03-28 to 2023-11-09) while the monitoring period (2024-03-01 to 2024-12-31) falls entirely after the crediting period ended
• ⚠Two corrective actions (CL 06 and CAR 02) remain open at the time of the verification report (2025-07-31)
• ⚠Seven contradictions identified across documents, including conflicting ERR figures, grid emission factors, and crediting period dates
• ⚠Minimum extraction confidence rated 'low', indicating at least one key document was poorly readable

Credit Vintages Exhausted