[en] Rarely do typical site remedial Conceptual Site Models demonstrate a perfectly defined plume, contained to homogeneous soil conditions on a flat structure-less site. However, with normal variable site conditions both above and below ground, multiple remedial methods are usually available, giving the consultant a choice of technologies to attain the remedial goals. At some sites, challenging constraints both limit the remedial technology choices and require specific application methods to overcome the site’s challenges. This abstract presents the remedial evaluation case studies for two such sites. Case study 1 is an active retail service station site in south-east Queensland, multiple site conditions such as shallow groundwater, potential acid sulphate soils and a residential property within close proximity to the hydrocarbon source area provided technical and non-technical limitations to our remedial choices. Case study 2 is an active retail station near Sydney evaluated for multiple technologies to clean up a release that had spread significantly downgradient. Soil conditions were fine grained clay to silt over weathered to unweathered shale which results in very poor recovery. Due to the poor hydrologic recovery, planned construction activities and the current site infrastructure, any remedial method chosen was going to be challenging to implement successfully. (author)