VA SB336

Directs the State Corporation Commission to evaluate requiring data centers to limit Tier 2 generator use and prioritize Tier 4 equivalent or better generators

Requires assessment of limiting Tier 2 generators at data centers to only sudden, unforeseeable outages (excluding planned outage events)

Examines feasibility of mandating data centers retrofit at least 20% of their Tier 2 generator fleet annually for five years until 100% meet Tier 4 equivalent emission standards

Includes survey of generator regulations across other industries in Virginia, including medical centers and public universities, as well as best practices from other states

Commission must submit findings to Senate and House committees by October 15, 2026