Contaminated sites present unique challenges that require tailored approaches to investigation and remediation. Conceptual site models are conventionally based on snapshots of site conditions, but understanding how contaminant distributions evolve in the subsurface can provide deeper insights. Digital tools based on fundamental physical transport and biodegradation reactions can enhance these models and support decision-making. This talk highlights how these tools can be applied to site characterization, risk assessment, and risk reduction through natural attenuation. By leveraging straightforward analytical tools, complex processes can be simplified, enabling practical and sustainable remediation solutions. Join us to explore practical ways to start integrating these tools for sustainable remediation.