Table 4 Parameter-related scores for calculating the weighting factors applied to the stock and effect score
From: Scoring scheme for Comparative Ranking of impact potential of chemical Alternatives (SCoRA)
Level of uncertainty | Weighting factor components for exposure, pollution burden | Weighting factor for long-term effects | Score | |||
|---|---|---|---|---|---|---|
| Â | Production volume | WDU | LRTP (CTD)* | LRTP (TE)* | Overall persistence (\({P}_{ov}\))** | Â |
Very low |  < 10 t/y | – | CTD < 5097 km and \({P}_{ov}\) <195 d | TE < 2.25% and \({P}_{ov}\) <195 d |  < 180 d | 1 |
Low | 10–< 100 t/y | IND | – | – | 180 days–< 365 days | 2 |
Moderate | 100–< 1000 t/y | PROF | CTD < 5097 km and \({P}_{ov}\) >195 d CTD > 5097 km and \({P}_{ov}\) <195 d | TE < 2.25% and \({P}_{ov}\) >195 d TE > 2.25% and \({P}_{ov}\) <195 d | 1 yr–< 5 yr | 3 |
High | 1000–< 10,000 t/y | – | – | – | 5 yr–< 10 yr | 4 |
Very high |  ≥ 10,000 t/y | CONS | CTD > 5097 km and \({P}_{ov}\) >195 d | TE > 2.25% and \({P}_{ov}\) >195 d |  ≥ 10 yr | 5 |