As detailed previously, the Inflation Reduction Act (IRA) offers incentives to renewable energy development that takes place on certain properties that are affected by potential or confirmed contamination. Under the IRA, a 10% adder is available to any investment tax credit (ITC) or production tax credit (PTC) generated by a renewable energy project constructed on a “brownfield site,” and there have been many questions since the IRA’s passage about what constitutes a brownfield site.