Büyükçekmece Cement Plant

Akçansa

01 Snapshot

Audit-grade Scope 1 · 2025

1,514,000

tCO₂ · allocated · operator-audited financial-grade

cf-corrected formula (leave-one-plant-out)

1,791,305

+18% vs. truth

EU CBAM default

3,960,000

+162% vs. truth

95% conformal prediction interval (formula, leave-one-plant-out, n=19): 969,379 – 3,310,134 tCO₂ (truth inside ✓)

95% interval restricted to cement calibration set: 1,055,703 – 3,039,465 tCO₂ (truth inside ✓ · undercoverage caveat at small n)

Open printable audit summary → One-page PDF you can hand to a verifier.

02 Facility data

Company: Akçansa
Plant: Büyükçekmece Cement Plant
Sector: cement
City: Büyükçekmece
Capacity: 2,500,000 t/y
Label source: disclosure
Provenance: Allocated from operator group Scope 1 by a disclosed physical share (clinker tonnage / crude steel tonnage).
Headline method: cf-corrected formula (capacity × route-EF × cf), evaluated leave-one-plant-out. +82.3% log-MAE reduction vs EU default across the 19 validatable plants.

03 Source citation

Akçansa 2025 IAR p46 (group Scope 1 gross 5,484,015) × Büyükçekmece clinker share p167 (1,943/7,037 = 27.6%)

Akçansa IAR archive

Allocated from Akçansa 2025 group Scope 1 (5,484,015) × Büyükçekmece clinker share 27.6%. Group total is audit-grade; per-plant split is by disclosed clinker tonnage, not directly disclosed.

05 Hyperspectral coverage

5 EnMAP L2A scenes index this plant (1 with <1% cloud cover). Source: DLR EOC STAC. Following Borger et al. (2025), these scenes can yield direct CO₂ and NO₂ plume retrievals at ~30 m spatial resolution.

Lowest cloud cover scenes (showing top 5):

2025-08-05T09:35:56Z · cloud cover 0% · ENMAP01-____L2A-DT0000146188_20250805T093556Z_003_…
2026-05-25T09:32:48.560409Z · cloud cover 1% · ENMAP01-____L2A-DT0000196528_20260525T093246Z_004_…
2024-04-25T09:28:58Z · cloud cover 6% · ENMAP01-____L2A-DT0000070635_20240425T092858Z_004_…
2024-04-25T09:29:00.582839Z · cloud cover 6% · ENMAP01-____L2A-DT0000070635_20240425T092858Z_004_…
2025-08-05T09:35:52Z · cloud cover 10% · ENMAP01-____L2A-DT0000146188_20250805T093552Z_002_…

Downloads require a free DLR EOWEB account (see enmap_access_howto.md).

06 Verify / correct

If you're an operator or analyst with a more recent disclosure than what's shown above:

Open a pull request adding a row to data/tr_facility_known_emissions.csv (source).
Or email hi@barisgunaydin.com with the source PDF.
Or use the claim-your-facility form on the bench page.

Corrections that include a verifiable public source land within 24 hours. All data is Apache-2.0 licensed; methodology at iz-mrv.pages.dev/paper.