Since Version 2.0 of Protocol 2 took effect in November 2017, the use of site-specific numerical soil standards developed using the BC Groundwater Protection Model has certainly grown, but it hasn’t become as widely adopted as might be expected. Many practitioners managing sites in areas with lower infiltration rates have caught on to its benefits, but generally only to adjust that single input. Why is that? Most likely, it is due to the number of possible variables available to adjust, and a lack of understanding of the impact of each on the resulting standards. In 2023, CSAP funded a study, conducted by SLR, to look at the impact of adjusting key inputs, with the goal of helping practitioners better understand how these inputs influence the resulting site-specific numerical soil standards. This presentation will include a brief overview of those findings, as well as some insights into common pitfalls that practitioners may fall into along the way.