BC’s Stage 14 Amendments to the CSR brought many changes, including Protocol 19, which outlines testing requirements when relocating non-waste soil from a source to a receiving site. For quarried material derived from bedrock, special testing requirements apply, including metal leaching and acid rock drainage (ML/ARD) evaluations, which are to be conducted by static tests defined in the protocol. These tests are commonly employed by the mining industry but may be less understood by contaminated sites practitioners. The static tests listed in the protocol do not specify the exact Acid Base Accounting (ABA) method requirements, and there are a number of different ABA methods that are in common use globally. Each ABA method makes different assumptions about the available sulfur within a sample that could potentially be oxidized. The neutralization and acid generation data produced by ABA methods can also be affected by other factors including the presence of specific minerals like Siderite, if present in the bedrock. The BC Ministry of Transportation and Infrastructure (MOTI) has issued more rigid method specifications and requirements for ML/ARD assessments under MOTI projects, including the involvement of qualified geological professionals. This presentation will explore some of the common ML/ARD tests, and suggests that a more rigid framework is beneficial to achieve standardized treatment of variables that can affect these assessments.