Since the 2010 Deepwater Horizon oil spill, the equation (Effective Daily Recovery Capacity; EDRC) used to evaluate cleanup capacity of select tools has been considered inadequate for calculating oil spill equipment needs. As a result, a new calculator (Estimated Recovery System Potential; ERSP) was developed. The ERSP aims to incorporate factors not accounted for in the EDRC. However, in inland and nearshore environments, ERSP may not be applicable. Thus, at a 2017 workshop, stakeholders developed an approach for upgrading the ERSP calculator. The objective of this study is to provide an independent peer review of the inland calculator and guidelines.