Coupling of Realistic Rate Estimates with Genomics for Assessing Contaminant Attenuation and Long-Term Plume Containment

Coupling of Realistic Rate Estimates with Genomics for Assessing Contaminant Attenuation and Long-Term Plum Containment

Assessing the natural attenuation of organic contaminants in aquifers using plume-scale electron and carbon balances: model development with analysis of uncertainty and parameter sensitivity.

A quantitative methodology is described for the field-scale performance assessment of natural attenuation using plume-scale electron and carbon balances. This provides a practical framework for the calculation of global mass balances for contaminant plumes, using mass inputs from the plume source, background groundwater and plume residuals in a simplified box model. Biodegradation processes and...

Modelling the Fate of Petroleum Hydrocarbons in Groundwater

Models can be powerful tools to aid interpretation of data and for prediction of the fate of contaminants, as in the case of petroleum hydrocarbons in groundwater environments. Here we describe the transport processes that can be more or less dominant at different stages in the ‘life’ of a petroleum contaminant spill in groundwater, such as advection, dispersion, dissolution from free-phase non...

A Deterministic Approach to Evaluate and Implement Monitored Natural Attenuation for Chlorinated Solvents

Brian B. Looney A US EPA directive and related technical protocol outline the information needed to determine if monitored natural attenuation (MNA) for chlorinated solvents is a suitable remedy for a site. For some sites, conditions such as complex hydrology or perturbation of the contaminant plume caused by an existing remediation technology (e.g., pump-and-treat) make evaluation of MNA using...

Combined radiocarbon and CO2 flux measurements used to determine in situ chlorinated solvent mineralization rate.

A series of combined measurements was made at the Naval Air Station North Island (NASNI) Installation Restoration Site 5, Unit 2 during July and August 2013. Combined measurements included CO2 respiration rate, CO2 radiocarbon content to estimate chlorinated hydrocarbon (CH) mineralization and a zone of influence (ZOI) model. CO2 was collected continuously over 2 two-week periods by recirculati...