In March 2024, a post-secondary institution in Thornbury, Ontario discovered that a routine remediation project on its campus had spiraled into something far more damaging than the original problem it was meant to address. The institution had retained a remediation contractor to handle environmental work on one of its older buildings, and that contractor in turn engaged their electrical subcontractor to perform ancillary electrical services as part of the broader scope. What the institution did not learn until well after the fact was that the electrician working for the subcontractor had taken direction from the regional telecommunications provider's representative to energize certain circuits in a manner that exceeded the subcontractor's contracted scope and violated the sequencing protocols established for the project. The result was $340,000 in additional damage to building systems that had been in the process of remediation, transforming what should have been a contained environmental cleanup into a layered property loss involving multiple parties, competing coverage positions, and a subcontractor that would ultimately prove insolvent. This lesson examines the contractual architecture that governs oversight duties in multi-party remediation projects, with particular attention to how those duties are created, documented, and enforced when work authorization failures occur across the chain of contracted relationships.