Dissolved Hydrogen Analyzer

Monitored natural attenuation MNA is a cost-effective remediation approach that is applicable to many sites and embraced by the U.S. Department of Defense DoD. MNA can be used to mitigate petroleum hydrocarbon, chlorinated hydrocarbon, and metal-contaminated sites as an alternative to groundwater pump-and-treat methods. Determining MNAs technical applicability for a given site is based on sampling and analysis, data evaluation and modeling, and long-term monitoring. Parameters that are evaluated include concentrations of contaminants, electron acceptors, and electron donors. These concentrations in combination with hydrogeologic, soil, and microbial characteristics are used to assess the fate and transport of contaminants and the potential for natural attenuation. Concentrations of electron acceptors or their reduced products are typically used to Identify terminal electron accepting processes TEAP responsible for contaminant biodegradation occurring in specific areas of a contaminant plume Quantify assimilative capacity of an aquifer for contaminants of concern. TEAPs affect in situ transformation of many pollutants in part by their impact on dissolved hydrogen DH concentrations in groundwater. Identification of TEAPs and DH concentrations can indicate specific degradation patterns of contaminants such as chlorinated hydrocarbons and benzene.