Best Practices for Environmental Site Management: A Practical Guide for Applying Environmental Sequence Stratigraphy to Improve Conceptual Side Models
issue paper will improve Conceptual Site Models (CSM) and provide a basis for understanding stratigraphic flux and associated contaminant transport. This is fundamental to designing monitoring programs as well as selecting and implementing remedies at contaminated groundwater sites. EPA recommends re-evaluating the CSM while completing the site characterization and whenever new data are collected. Updating the CSM can be a critical component of a 5 year review or a remedy optimization effort.
These methods are applicable to sites underlain by clastic sedimentary aquifers (e.g., intermixed gravels/sands/silts/clays). The scientific principles and methods presented in this document bring clarity to the challenges posed by lithologic heterogeneity thereby facilitating successful site management strategies. Lithologic heterogeneities can be characterized by the use of high resolution site characterization (HRSC) techniques (http://www.cluin.org/characterization/technologies/hrsc/). The application of sequence stratigraphy can be applied to new site investigations as well as existing site data to update the Conceptual Site Model (CSM). These methods allow the practitioner to place environmental subsurface data in a geologic and hydrogeologic context, and predict the geology where subsurface data are absent.