Researchers at the University of Toronto have developed and published multiple peer-reviewed papers on the use of a mercury passive air sampler (MerPAS) method for highly accurate and precise low-resolution measurements at the ppqv level (150 ppqv = 1.3 ng/m³). A highly accurate mercury passive air sampler has many potential applications (e.g. contaminated site monitoring). In the context of NADP, the potential for using MerPAS would likely focus on three general uses: 1) Supplementing AMNet sites to improve spatial representation, 2) Monitoring at remote, sensitive ecosystem sites, such as national parks or at high elevation and 3) Low-cost, spatially dense short term studies to map agricultural, industrial or urban landscapes. All the above MerPAS applications would help improve mercury deposition model development and verification. For routine use, a low-tech, low-cost mercury passive air sampling method must be applied with an understanding of the trade-offs in sensitivity and resolution. Furthermore, there can be technical challenges when transforming a research-based method into a routine method with a wide range of applications and multitude of end-user types.  Questions answered by this presentation include: 1) What packaging and preventative measures work for use and storage of samplers to prevent contamination, 2) How critical is the surface area of the media insert and the reproducibility of the carbon preparation, 3) Is the analysis of the sample straightforward and transferable to a routine laboratory and 4) What are the quantifiable trade-offs for time resolution, accuracy and quality assurance relative to short term studies or long-term trend determination.