Which of the following is NOT a common feature of decommissioning tasks?

The option indicating minimal environmental implications is not a common feature of decommissioning tasks. Decommissioning often involves the dismantling and removal of structures or facilities, which can have significant environmental impacts. This includes potential contamination of soil and water, the management of hazardous materials, and the need for restoration to restore ecosystems.

In contrast, decommissioning tasks are typically characterized by very high costs due to the complexity and safety measures required to properly dismantle and manage the sites. Additionally, these projects often have long time frames for completion, as thorough planning, execution, and remediation efforts can extend the duration significantly. There are also inherent environmental implications, which further emphasizes the importance of careful management and planning. Hence, minimal environmental implications do not align with the realities often faced in decommissioning projects.