Optimization and Monitoring for Remediation of Chlorinated and Related Compounds

Transcription

1 Optimization and Monitoring for Remediation of Chlorinated and Related Compounds Program and Abstracts DETROIT, COLUMBUS AND CLEVELAND Oct. 23, 24 and 25, 2018 remediationseminar.com

2 Schedule of Speakers and Presentations TECHNICAL PRESENTATIONS 10:00 am 10:30-11:00 am 11:00-11:30 am 11:30 am - 12:00 pm 12:00-1:30 pm 1:30-2:00 pm 2:00-2:30 pm 2:30-3:00 pm 3:00 pm Registration and networking Sangho Bang, Ph.D., Tersus, Advances in Electron Donor Amendments Sandra Dworatzek, M.Sc., SiREM, Bioaugmentation - It s not just for TCE Anymore Joshua Richards, P.G., CHMM, Pace, Comprehensive tools for remediation support - Can you measure progress? LUNCH Sandra Dworatzek, M.Sc., SiREM, How Treatability and Molecular Testing Saves Time, Money and Heartburn Joshua Richards, P.G., CHMM, Pace, Emerging Tools to Manage 1,4 Dioxane Sites Sangho Bang, Ph.D., Tersus, Optimization and Performance of ZVI Amendments for In-Situ Chemical and Biological Reduction Networking 1

3 Abstracts ADVANCES IN ELECTRON DONOR AMENDMENTS Gary M. Birk, P.E. David F. Alden, P.E. com), and Sangho Bang, PhD (Tersus Environmental, Wake Forest, NC, USA) Surfactants, polymers and solvents are key chemicals in designing products that are injected during groundwater remediation activities. Although these ingredients should all be compatible with health and environmental requirements, their function varies according to each technology s objective. For example, practitioners have concluded that NAPL solubilization with surfactants was a necessary first step in the mobilization process and that surfactant concentration, up to a point, was generally proportional to performance. When, rather than NAPL recovery its destruction is pursued, surfactants aid in creating complex water-zvi suspensions in oil continuum or to disperse solids, nano-particles or non-water-soluble amendments, such as vegetable oils, sands, iron or activated carbon into aquifers. Technology developed at the University of Oklahoma, originally focused for enhanced oil recovery at petroleum reservoirs and subsequently adapted to the environmental arena, can lower the IFT sufficiently to allow physical mobilization of residual LNAPL with the limited production of thermodynamically stable emulsions. Similar emulsion know-how allows pharmaceutical and oil refining industries to prepare complex mixtures of chemicals. This talk will share laboratory and field efforts conducted to design lower cost remediation products than can effectively address constituents of concern yet be easily mixed and distributed in typical subsurface, porous environments. The presentation will include results and lessons learned from the latest field implementations of a slurry of sponge iron and electron donor using an optimized polymer and surfactant blend to minimized injection pressures and field costs while maximizing the products reactiveness. BIOAUGMENTATION - IT S NOT JUST FOR TCE ANYMORE Phil Dennis, M.Sc. (pdennis@siremlab.com), Sandra Dworatzek, M.Sc. (sdworatzek@siremlab. com) and Jeff Roberts M.Sc. (jroberts@siremlab.com) (SiREM, Guelph, ON, Canada) Bioaugmentation is the addition of beneficial microorganisms to enhance bioremediation. Some of the benefits of bioaugmentation include extending the range of sites where cost effective bioremediation is feasible and reducing clean up times for sites where remediation progress may be lagging. Bioaugmentation for remediation of chlorinated ethenes, such as trichloroethene (TCE), is now routine and has been applied successfully at a large number of sites worldwide. A notable achievement of more recent advances is the ability to achieve meaningful dechlorination at sites with lower groundwater ph through buffering and the use of low ph tolerant bioaugmentation cultures (i.e., KB-1 Plus). Due to research and development over the past decade, our understanding of biodegradation pathways for a growing range of contaminants is growing rapidly and bioaugmentation cultures are now available for contaminant classes including chlorinated ethanes (e.g., 1,1,1-TCA/1,2-DCA) chlorinated methanes (e.g., chloroform and methylene chloride), and chlorinated propanes (e.g., 1,2,3-TCP). Progress is also being made on bioaugmentation cultures for non-chlorinated compounds including 1,4-dioxane. Cultures for degradation of benzene and other BTEX compounds under anaerobic conditions are also being developed, making the often challenging, addition of oxygen to aquifers unnecessary. This presentation will provide an overview of the suite of bioaugmentation cultures being applied for bioremediation of an expanding range of recalcitrant compounds. As well, several case studies where bioaugmentation has been successfully used under challenging conditions, including a low ph site in Florida, and a fractured rock site with high concentrations of carbon tetrachloride will be presented. 2

4 Abstracts COMPREHENSIVE TOOLS FOR REMEDIATION SUPPORT CAN YOU MEASURE PROGRESS? Joshua Richards, P.G., CHMM (Pace Analytical Energy Services, LLC, Pittsburgh, PA) The use of comprehensive tools during site remediation is fundamental in achieving regulatory closure. Sites that are using augmentation, albeit bio or chemical, expedite the attenuation process of the contaminants of concern. Routine monitoring of the attenuation parameters (i.e., total organic carbon, hydrogen, chlorides, etc) is a vital step towards understanding the effectiveness of the implemented remedy. Monitoring also plays a vital role in understanding the process of the plume evolution model and what stage the site is in currently. Secondary attenuation parameters have been found to increase site understanding and allow for refinement of the remedial approach and further enhance the conceptual site model (CSM). Analysis of dissolved gases (methane, ethane, and ethene) as well as volatile fatty acids (VFAS; acetic, lactic, etc) at low levels enables a higher resolution of amendment efficiency, or lack thereof. Compound Specific Isotope Analysis (CSIA) has emerged as both a forensic tool and a degradation monitoring tool. Using specific stable isotopes of targeted contaminants can provide both proof of contaminant degradation, and the mode of degradation to ensure unidentified sources/ secondary sources aren t impacting the remediation effort. In this presentation you will learn how to utilize these and other tools to more effectively manage your remediation project and meet the demands of your regulator and your client. HOW TREATABILITY AND MOLECULAR TESTING SAVE TIME, MONEY AND HEARTBURN Phil Dennis, M.Sc. (pdennis@siremlab.com), Sandra Dworatzek, M.Sc. (sdworatzek@ siremlab.com) and Jeff Roberts M.Sc. (jroberts@siremlab.com) (SiREM, Guelph, ON, Canada) The use of laboratory treatability studies and molecular biological testing are valuable tools for remediation practitioners due to their predictive nature which can provide insight into site specific remediation approaches that can be used to improve remediation project planning, implementation and management. Microcosm or column treatability studies can be used to assess the impact of site amendments including electron donors, ph buffers, bioaugmentation cultures and chemical oxidants prior to field implementation. These studies are used to evaluate and understand if a proposed remediation strategy has the potential to succeed and to further optimize the remedy prior to field implementation. The use of treatability studies reduces the potential for costly dead ends due to poorly suited or inappropriately applied remedial technologies and reduces the incremental risk as a project moves from design to field implementation. Likewise, molecular biological tools (i.e., Gene-Trac ) can be used to determine if a site has the required microorganisms for successful bioremediation prior to addition of amendments. Molecular tools provide early screening of a site s microbiology to determine if natural attenuation is feasible, if addition of electron donors is likely to be successful or if bioaugmentation is required. After implementation, molecular testing often provides important evidence for impending remediation success, months before other parameters. Alternatively, where abundance of key dechlorinating bacteria decline, molecular testing can provide evidence of challenging site conditions that may require further attention. The predictive aspects of treatability testing and molecular testing make them useful tools that enhance the remediation project manager s ability to confidently move forward with a remedial strategy and to assess performance and assist with troubleshooting. Ultimately, these tests can save time, money and heartburn associated with the implementation of remediation projects. 3

5 Abstracts EMERGING TOOLS TO MANAGE 1,4 DIOXANE SITES Michael King (Pace Analytical Services, LLC, Minneapolis, MN) The evaluation of emerging contaminants is an expanding market in the environmental industry. Sites are currently being re-evaluated based on the potential presence of the emerging contaminants. One particular EC that is drawing the most attention is 1,4-Dioxane (1,4-D). The wide range of uses for 1,4-D, mainly as a chlorinated solvent stabilizer, increase the potential for sites to be impacted. Regulatory agencies across the US are increasing required investigation of current and closed sites for 1,4-D. Current methodologies for detecting 1,4-D include low detection limits, mobile lab options, and compound specific isotope analysis. Treatability options are available, which include analyzing biomarkers to assess degradation. OPTIMIZATION AND PERFORMANCE OF ZVI AMENDMENTS FOR IN-SITU CHEMICAL AND BIOLOGICAL REDUCTION Gary M. Birk, P.E. (gary.birk@tersusenv.com), David F. Alden, P.E. (david.alden@tersusenv.com), and Sangho Bang, PhD (sangho.bang@tersusenv.com) (Tersus Environmental, Wake Forest, NC, USA) In Situ Chemical Reduction (ISCR) is an innovative environmental remediation technique used for soil and/or groundwater remediation that involves the placement of a reductant or reductant generating material in the subsurface to reduce the concentrations of targeted environmental contaminants to acceptable levels. Zero valent iron (ZVI) is most commonly used for remediating halogenated ethenes and ethanes, pesticides, energetic compounds and some metals/metalloids into harmless end products. [ITRC 2011]. The process combines both biological processes and ZVI particle-driven abiotic pathways to chemically reduce the contaminants. The incorporation of ZVI enhances remediation by enabling various chemical reduction pathways and for halogenated ethenes limits the formation of undesirable breakdown products such as Cis-DCE and vinyl chloride. Recent studies were undertaken to evaluate the reactivity, surface passivation, and ph fluctuation of various commercially available ZVI powders and an engineered ZVI media with a greater surface area. The ZVI samples were under identical conditions for 103 days with a solid to liquid ratio was 1:20 by weight. Particle size of all ZVI was <100 mm. The lab-scale kinetic experiment demonstrated accelerated abiotic reactivity of the engineered ZVI media towards a mixture of c-voc composing of tetrachloroethylene (PCE), trichloroethylene (TCE), cis-dichloroethylene (c-dce), and 1,1,1-trichloroethane (111TCA) in synthetic groundwater (each compound at 5 mg/l). The study concluded that the major difference between engineered ZVI media and off-the-shelf ZVI powders is the increased reactivity of the engineered ZVI media. The engineered ZVI media was also able to maintain circumneutral ph, generate higher rates of hydrogen and sustain the production of hydrogen for a longer duration. 4

6 Speaker Bios Sangho Bang, Ph.D. Technical Associate, Tersus Environmental Sangho is a graduate of University of Oklahoma, Norman OK, where he majored in Petroleum Engineering earning a BSc, MSc and Ph.D. He has eight years of research on chemical enhanced oil recovery (CEOR) and nanoparticle-based stimulation fluid in laboratory and field implementation of chemical floods. His experience includes managing single well tracer tests in an Oklahoma oil field and formulating fluid systems (surfactant/nanoparticle) for CEOR/ acidizing/ fracturing/ conformance control in various oil fields in USA, Canada, and UAE. Sangho also has two patent applications pending for: Neutral Buoyancy Control for Surfactant-Enhanced Aquifer Remediation of Dense NAPL, 2018 and Nanoparticle-Based Stimulation Fluid for Acid Diversion in Carbonate Reservoirs, Sandra Dworatzek, M.Sc. Senior Manager, SiREM Sandra Dworatzek (B.Sc. and M.Sc., University of Waterloo) is a Senior Manager at SIREM. Sandra is an environmental microbiologist with advanced technical experience in the design and set up of laboratory treatability studies and anaerobic microbial culture growth. Over the past 18 years she has conducted and overseen a multitude of bench-scale studies examining enhanced in situ bioremediation in soil, sediments and groundwater. Sandra has a wealth of technical experience in the design of laboratory biotreatability studies, the growth and application of anaerobic bioaugmentation cultures and the evaluation of chemical oxidation and zero valent iron technologies in the laboratory. Through her work at SiREM, Sandra has played a key role in the development and commercialization of SiREM s suite of products and services. Joshua Richards, PG, CHMM Program Manager, Pace Energy Services Josh Richards is the Program Manager for Pace Energy Services and leads the sales/marketing efforts. Josh has eight years of experience as an assessment/remediation geologist in the consulting industry working on large scale remediation projects. More recently Josh gained analytical experience as an Account Executive for Pace Analytical in the Midwest. This combined experience will provide a unique perspective from which to guide the growth of Pace Energy. Josh received his BA in Geology from Indiana University-Purdue University at Indianapolis and his MS in Geology from the University of Florida. 5

7 Short Course Sponsors Pace Analytical Services, LLC ( is a privately held, industry-leading sampling and analytical testing firm. Pace provides analytical lab solutions for testing, staffing and equipment, with a wide scope of services. With a nationwide network of 32 environmental laboratories, 4 life sciences labs, 2 LabOps locations, and 48 service centers, Pace has the capacity to support a diverse client base from local, state and national government programs to industry, engineering/consulting, mining, energy and R&D. Our 40 years of experience give us the expertise and vision to partner with these clients, providing analytical testing and services to support both short-term needs and long-term development even in today s challenging economic environment. SiREM ( was founded in 2002 to provide the highest quality testing services and remediation products combined with unparalleled technical support to increase remediation effectiveness, decrease remediation costs and provide peace of mind during field implementation. Our focus is the remediation of chlorinated solvents, metals, petroleum hydrocarbons and other recalcitrant contaminants in soil, sediment and groundwater. SiREM is widely recognized as a leader in bioaugmentation for chlorinated solvent remediation and bench-scaletreatability testing applied to a wide range of remediation technologies including in situ chemical oxidation (ISCO), in situ chemical reduction (ISCR), bioremediation and permeable reactive barriers. SiREM also offers a range of laboratory testing services for remediation site monitoring, management and optimization including Gene-Trac testing for monitoring biodegradative microbes and other specialized analyses. Tersus Environmental ( was founded in 2011 to research, develop, and commercialize innovative soil and groundwater remediation solutions through university and professional relationships to meet the increasing technological demands at contaminated sites. Dedicated to supporting their clients by delivering outstanding customer service every day, Tersus provides proven technologies help clients reduce uncertainty, minimize risks, and achieve cost-effective results. Tersus is not focused on a specific technology and offers the right solution for your specific site needs for remediation of: Chlorinated Solvents Petroleum Hydrocarbons NAPLs Metals Pesticides 6

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12 Short Course Sponsors Copyright 2018 Remediation Seminars. All Rights Reserved. Rev. 09/27/2018