Hydrogen Release Compound can be applied to the subsurface in a number of different ways. The application method chosen is often attributed to a range of factors including depth to groundwater, soil type, location and extent of contaminants, remediation objective, etc. Typical installation of HRC involves the use of direct-push technology which can be an extremely cost-effective, efficient and clean way to deliver the product into groundwater. The following table contains HRC installation instructions for several different types of installations. HRC is typically applied using direct-injection techniques. This process enables the viscous HRC material to be pressure injected into the zone of contamination and moved out into the aquifer media. Once in the subsurface, HRC® can reside within the soil matrix fueling reductive dechlorination and promoting reducing aquifer conditions for periods of up to 24 months or longer through the controlled release of lactic acid and subsequent hydrogen production.
For details related to HRC application please refer to the detailed instructions below.
Extended – Hydrogen Release Compound (HRC-X) is a special formulation of the patented and widely accepted Hydrogen Release Compound (HRC) which has been successfully installed on hundreds of project sites world-wide. It is specifically formulated to treat residual dense non-aqueous phase liquids (DNAPL) in the groundwater and provide a long-term solution to groundwater plume control. HRC-X is manufactured as a viscous gel that can be injected into the saturated zone in a grid- or barrier-based configuration for either localised area or cutoff-based treatment approaches. Regenesis believes that the best method to install HRC-X into the subsurface is using direct-push drilling techniques. This method allows for the product to be pushed into the formation instantly and provides greater coverage/treatment over the life of the product.
For details related to HRC-X application please refer to the detailed instructions below.
3-D Microemulsion is typically applied in high-volumes as an emulsified, micellar suspension (microemulsion). The material is delivered to the site as a concentrate and is then emulsified with on-site water forming an easy to handle and pump microemulsion with a relatively high hydrophilic/lipophilic balance (HLB). This high HLB allows dilute 3-D Microemulsion suspensions to be well distributed across contaminant plumes without high injection costs. 3-D Microemulsion applications can be configured in several different ways including: grids, barriers and excavations. The material itself can be applied to the subsurface through the use of direct-push injection, hollow-stem auger, existing wells or re-injection wells 3-D Microemulsion is usually applied throughout the entire vertical thickness of the determined treatment area. Once injected, the emulsified material moves out into the subsurface pore spaces forming micelles and moving via micellar transport, eventually coating most all available surfaces, these structures provide the added benefit of increased distribution via migration to areas of lower concentration. Over time the released soluble components of 3-D Microemulsion are distributed within the aquifer via the physical process of advection and the concentration driven forces of diffusion.
For details related to 3-D Microemulsion on-site emulsification and application please refer to the detailed instructions below.