![]() • • • • • • Clu-In Resources• • • A project life cycle conceptual site model (CSM) is a comprehensive graphical and written summary of what is known or hypothesized about environmental contamination at a site and the relationships among key site information that are pertinent to decision-making. A CSM is a representation that evolves over the life cycle of site investigation and cleanup efforts. It provides a platform for evaluating the data gaps and related uncertainty associated with site history and operations; geology, hydrogeology and hydrology; contaminant sources, release mechanisms and fate and transport; potential receptors and exposure pathways. The development of an accurate CSM is vital to the project and site decision-making process. A project life cycle CSM is comprised of six stages, as described below: • Preliminary CSM Stage – Site representation based on existing data; conducted prior to systematic planning efforts. • Baseline CSM Stage – Site representation used to gain stakeholder consensus or disagreement, identifies data gaps and uncertainties; conducted as part of the systematic planning process. • Characterization CSM Stage – Continual updating of the CSM as new data or information is received during investigations; supports remedy decision making. For a start, the information should be integrated and presented as a conceptual site model (CSM). According to ASTM International E1689-95 (2008) Standard Guide for Developing Conceptual Site. Models for Contaminated Sites, a CSM is 'a written or pictorial representation of an environmental system and the biological,. CONCEPTUAL SITE MODELS. 28 December 2012. This Engineer Manual (EM) provides U.S, Army Corps of Engineers. (USAGE) and other personnel with procedural guidance to develop Conceptual Site. Models (CSMs) at sites potentially containing munitions and explosives of. The site-specific response to water resource problems and the discipline focus of water resources research give rise to two circumstances for which conceptual models are ideally suited. First, conceptual models promote the linking of a site-specific phenomenon to the systemwide sources of the. • Design CSM Stage – Targeted updating of the CSM to support remedy design. • Remediation/Mitigation CSM Stage – Continual updating of the CSM during remedy implementation; and providing the basis for demonstrating the attainment of cleanup objectives. • Post Remedy CSM Stage – The CSM at this stage is used to support reuse planning and placement of institutional controls if warranted. Selected Resources Click on a column heading to sort the table. Search for additional publications or resources by keyword or topic using the page. Title Document Number Type Date EPA 540-F-96-018 1996 EPA 542-R-06-007 Case Studies 2006 EPA 542-F-11-011 Factsheet 2011 EPA 540-G-89-004 Guidance 1988 EPA 540-R-93-080 Guidance 1993 EPA 540-R-95-141 Guidance 1995 N/A Online Resources EPA 600-R-99-007 Technical Publication 1999 EPA 542-F-08-007 Technical Publication 2008. ![]()
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