EcoSpold 1 · Calculation comparison

BAFU 2026 v1, Heavy metals into soil

A comparison of published impact results with VoLCA calculations from the same source data and the publisher’s impact factors. Points on the diagonal agree.

Engine version: volca 0.14.0 (bd7e64a, v0.14.0, linux)
Measured on: 2026-09-20

Comparison measurements and reference
Database	BAFU 2026 v1
Source format	EcoSpold 1
Impact method collection	Ecological Scarcity 2021
Impact category	Heavy metals into soil
Unit	UBP
Activities compared	11,648
Median ratio (VoLCA / published)	0.9997
Comparison band	1%
Activities outside the band	685
Share outside the band	5.88%
Verdict	Disagrees: misses the agreement a release is held to
Points drawn	2,102
Largest relative deviation	-95.13%
Activity with largest deviation	Fatty alcohol, from palm oil, at plant
Published reference	BAFU-2026 v1 LCIA Results_corrected.xlsx

Each point is one activity: what BAFU 2026 v1 published for Heavy metals into soil (UBP), against what VoLCA computes from the same EcoSpold 1 source under the publisher's own Ecological Scarcity 2021 factors. The black line is equality and the grey band is 1%. 11,648 activities were compared; 685 fall outside the band, more than a picture can hold, so 1,942 of the 11,648 are drawn, evenly spaced over the published value whichever side of the band they fall, and the 160 of the 200 farthest from equality that this walk missed are added. Where several fall on one spot, at most three markers are drawn there, since a fourth would not darken it. Median ratio 0.9997, 5.88% outside the band. This misses the agreement a release is held to: at most 5% of activities outside the band and a median ratio inside it.