Wednesday, 28 March 2012
Author: Craig Sandefur, Vice President of Technical Services – REGENESIS
A recent technical paper entitled “Chloroethene Biotransformation in the Presence of Different Sulfate Concentrations” by Marina Pantazida, et al. and published in the Winter 2012 Edition of Groundwater Monitoring and Remediation makes a number of interesting observations about enhanced reductive dechlorination (ERD) under elevated sulfate conditions. The authors clearly provide a recommended upper limit for sulfate (250-300 mg/L) for complete dechlorination to proceed. Of interest to me is their observation that sulfate reduction and reductive dechlorination (RD) proceed concurrently in most studies. This observation is consistent with those of us that have long thought that removal of all sulfate does not have to happen prior to the onset of RD or in order for RD to proceed to completion. For more information on this paper visit the National Groundwater Associations website at ngwa.org to view their online archive or order to order a copy of Groundwater Monitoring and Remediation.
Friday, 16 March 2012
Be a part of new online webinar event titled, “A Case Study on Chlorinated Solvent Remediation using Sequential In Situ Chemical Oxidation (ISCO) and Enhanced Anaerobic Biodegradation” This web-based presentation will be given by Christine (Tina) Reese, P.G., Senior Hydrogeologist at Symbiont Science Engineering & Construction, Inc. and will be held on Thursday, March 29th from 11:00 am to 12:00 pm Pacific Daylight Time (PDT). Please see details and registration information below. This webinar presentation is sponsored by REGENESIS and is free-of-charge. This case study based presentation will include key information about the following:
- The project site background
- Overview of chlorinated solvent impacts
- Planned shut-down of existing groundwater extraction and treatment system
- Remediation strategy shift
- ISCO to reduce chlorinated solvent mass
- Enhanced anaerobic biodegradation to treat residual contaminants
- Establish conditions suitable for MNA and gain site closure
- Results of remediation efforts
- Current status of the project
Did you miss it? If so you can view the recorded version by clicking here.
Wednesday, 7 March 2012
March 7, 2012 – In response to an invitation by the USEPA, REGENESIS is giving a technical presentation on In Situ Chemical Oxidation and Enhanced Recovery Techniques using RegenOx® PetroCleanze™ at today’s USEPA Engineering Forum (EF) webcast. This program is part of the EPA Technical Support Project (TSP) (http://epa.gov/tio/tsp/). The TSP has three forums the Engineering Forum, the Ground Water Forum, and the Federal Facilities Forum. Members of these Forums work to improve communications and assist in technical transfer between the Regions and the Centers. The Forums also act as technical resources, and disseminate information resulting from the Project to their Regional colleagues. They also meet semi-annually to discuss technical and policy issues, new technologies, and to network with other Federal agencies.
According to the USEPA website, the Technical Support Center, responds to approximately 400-500 requests for technical assistance each year. These projects have included various types of technical assistance, such as:
- Reviews of contractor workplans and reports: RIs, FSs, and RDs
- Treatability studies (e.g., bioremediation, stabilization/solidification, soil washing, incineration)
- Selection and evaluation of remedial technologies
- Development and review of sampling plans, application of models, interpretation of data
- Application of innovative technologies
- Development of technical transfer papers
RegenOx PetroCleanze is a specialized formulation of the widely used RegenOx® in situ chemical oxidation technology. The primary function of RegenOx PetroCleanze is to increase the desorption rates of hydrocarbons bound in saturated soil and make them available for more efficient and rapid treatment using a range of enhanced recovery technologies. For more information visit www.petrocleanze.com.