FRC 2022 Poster Presentations

Using Combinations of Solid Phase Amendments to Accelerate In-Situ Remediation

Dr. John Freim, Director of Materials Science, Regenesis Bioremediation

Abstract:

Colloidal activated carbon accomplishes the rapid elimination of many aqueous phase groundwater contaminants.   Adding complimentary amendments can promote active degradation, resulting in accelerated and sustained remediation.   This work describes the modeling and performance of novel solid phase colloidal remediation amendments that promote degradation through both abiotic and biotic mechanisms.

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AFFF Use, Best Management Practices, and Response Planning

Jill A. Greene, P.G., PMP  Principal Geologist, CDM Smith, Inc.

Abstract:

Firefighting foams have recently become the subject of much scrutiny, as some Class B foams contain per- and poly- fluoroalkyl substances (PFAS). The PFAS serve as surfactants that spread the foam to trap oxygen and suppress the fire. Unfortunately, the same properties that make PFAS so effective in fighting fires result can result in contamination in locations of discharge. A variety of BMPs can be implemented to reduce potential environmental impacts from the use of firefighting foams. Many users of Class B firefighting foam are working to transition to fluorine-free products; however, firefighting foam replacement is complex and could require a complete system review and, potentially, redesign and modification of system components to meet the new objectives or material and performance requirements. Additionally, effective technologies for decontamination of foam dispensing equipment are in their infancy and evolving regulations and policies make the disposal/treatment of rinsewater or replaced AFFF challenging. This presentation will provide an overview of the use of firefighting foams and regulatory framework governing their use, best management practices to reduce to potential for impacts to the environment, response planning in the event of foam discharge, and the current state of methods for foam transition. 

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Environmental Analysis of Surface Water Pollution in Ibadan, Nigeria Using  Bodija Stream as a Case Study

Daniel Odion, CCM, Ascension Construction Solutions

Abstract:

Surface water pollution has always been a significant menace for municipalities because of its   chronic effect on human health. Identifying ways to minimize its occurrence through proper waste   disposal is not only vital to the survival of human health, but also enhances the sustainability of   water resources in any clime. This study gives an insight into the effects of pollution on qualities of   streams in Nigeria. As a case study, the pollution level of Bodija stream was analysed by taking  samples at seven different points (sp1-sp7) along the stream stretch considering the upper, middle,   and lower courses of the stream and their pollution sources (e.g., abattoir, markets) for physical,   chemical, and bacteriological analyses. The main characteristics determined were temperature,   color, turbidity, total solids, PH value, electrical conductivity, total hardness, calcium hardness,   dissolved oxygen, BOD, COD, and faecal coliform counts. The results from the analysis showed   high rate of gross pollution across the length of the stream with highest being recorded at its upper   course. Values from BOD, COD, alkalinity, chloride, hardness indicates that the level of municipal   waste transfer from washings, refuse, faeces, urine, and other human activities. The order of   pollution of the river thus followed this pattern; sp1> sp2 > sp4 > sp5 > sp3 > sp6 > sp7. Therefore,   this study has shown that poorly maintained waste systems is a major cause of surface water   pollution, especially in developing countries like Nigeria, and opined by way of recommendation   that proper and efficient environmental policies which emphasize on proper disposal of industrial   and sewage wastes can serve as a preventive solution to the problems created by water pollutants.

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Novel Mobile Permanent Membrane Filtration of PFAS and Other Contaminants from Water Sources

Gerard Simon, COO, Advanced Mobile Filtration Services, LLC

Abstract:

Increasing awareness in proper cradle to grave treatment and disposal or contaminants such as PFAS are on the forefront of many operators, environmental agencies and communities, and are followed closely with emerging technologies to provide solutions.  Once such novel technology using mobile permanent nano membranes, which allow for removal of PFAS and other contaminants to non-detect levels, without the need for chemical interaction that allows disposal or reuse of the water permeate.  The technology is commercially available at very high flow rates without fouling or need for cartridge changeout and landfill disposal as traditional filtration.  

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Electrical Monitoring of Karst Flowpaths

Kyle Spears, Technical Sales Manager, Aestus, LLC

Abstract:

Remediation in karst aquifers has been historically difficult and costly due to rapid groundwater and contaminant flow through discrete fracture and/or dissolution zones. The standard environmental industry approach is to try and map these features utilizing wells or direct push techniques which generally does not produce acceptable results. An alternative approach is to monitor a site using temporal electrical resistivity imaging (TERI) stations to provide high resolution data to locate discrete flowpaths and related flow patterns over time, which are associated with recharge and draining of karst aquifers.     This approach is illustrated on a case study basis using TERI data from a managed aquifer recharge (MAR) research site in Oklahoma. The results indicate that the rapid pathways and hydraulic structures in both vadose and phreatic zones are easily mapped in any type of geology (including hard rock sites). Additionally, changes due to water content and bioactivity can be monitored. This TERI technique can be easily applied to focus and monitor remediation work at contaminated sites, as well as address questions related to water supply projects.