| Total Project Costs, considering different projections | ||||
| Yearly Cost Breakout for Low Cost to Closure (10th percentile) | ||||
| Item | Basis | Description | Duration | Sum (R$) |
| 1 | Prescribed action on chronogram | Contingency surface water/sediments sampling | 13 years | 949,000 |
| 2 | Prescribed action on chronogram | Performance Based Action for Free Product | 2 years | 1,611,000 |
| 3 | Contingency | Risk of continuation of Free Phase Action | 2 additional years | 588,000 |
| 4 | Prescribed action on chronogram | One round of remediation | 2 years | 1,750,000 |
| 5 | Likely required and based on 2017/18 monitoring results | Near term monitoring for performance confirmation | 2 years | 410,000 |
| 6 | Contingency | Multilevel investigation | did not occur | 0 |
| 7 | Contingency | Additional rounds of remediation | 2 years | 1,270,000 |
| 8 | Likely requirement once prescribed actions complete | Long-Term Monitoring Program | 11 years | 1,565,000 |
| 9 | Likely requirement once prescribed actions complete | Report on delineation and use restrictions for obtaining Terms of Rehabilitation | 1 event | 250,000 |
|
|
|
| Total | 8,393,000 |
| Yearly Cost Breakout for Median Cost to Closure (50th percentile) | ||||
| Item | Basis | Description | Duration | Sum (R$) |
| 1 | Prescribed action on chronogram | Contingency surface water/sediments sampling | 11 years | 759,000 |
| 2 | Prescribed action on chronogram | Performance Based Action for Free Product | 2 years | 1,603,000 |
| 3 | Contingency | Risk of continuation of Free Phase Action | 2 additional years | 533,000 |
| 4 | Prescribed action on chronogram | One round of remediation | 2 years | 2,370,000 |
| 5 | Likely required and based on 2017/18 monitoring results | Near term monitoring for performance confirmation | 2 years | 460,000 |
| 6 | Contingency | Multilevel investigation | 5 years | 839,000 |
| 7 | Contingency | Additional rounds of remediation | 2 years | 2,370,000 |
| 8 | Likely requirement once prescribed actions complete | Long-Term Monitoring Program | 8 years | 1,159,000 |
| 9 | Likely requirement once prescribed actions complete | Report on delineation and use restrictions for obtaining Terms of Rehabilitation | 1 event | 275,000 |
|
|
|
| Total | 10,368,000 |
| Yearly Cost Breakout for High Cost to Closure (90th percentile) | ||||
| Item | Basis | Description | Duration | Sum (R$) |
| 1 | Prescribed action on chronogram | Contingency surface water/sediments sampling | 15 years | 990,000 |
| 2 | Prescribed action on chronogram | Performance Based Action for Free Product | 2 years | 2,172,000 |
| 3 | Contingency | Risk of continuation of Free Phase Action | 3 additional years | 807,000 |
| 4 | Prescribed action on chronogram | One round of remediation | 2 years | 3,268,000 |
| 5 | Likely required and based on 2017/18 monitoring results | Near term monitoring for performance confirmation | 2 years | 664,000 |
| 6 | Contingency | Multilevel investigation | 4 years | 1,039,000 |
| 7 | Contingency | Additional rounds of remediation | 2 years | 3,268,000 |
| 8 | Likely requirement once prescribed actions complete | Long-Term Monitoring Program | 13 years | 1,237,000 |
| 9 | Likely requirement once prescribed actions complete | Report on delineation and use restrictions for obtaining Terms of Rehabilitation | 1 event | 253,000 |
|
|
|
| Total | 13,698,000 |