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Largest Clean-up Grant in Canadian History

As reported by Laura Osman of the CBC, Councillors on Ottawa’s finance committee unanimously approved a $60-million grant to clean up contaminants to make way for a massive new development on Chaudière and Albert islands.

Windmill Development Group applied for the grant for its mixed-use Zibi project.

Windmill will clear the contaminated soil on the site, which has historically been used as an industrial site, and demolish a number of buildings.

An artist’s rendering of the Zibi development, which could receive a substantial grant from the city for soil and building cleanup. (City of Ottawa)

“These are contaminated lands on a derelict site in the city’s urban core,” said Lee Ann Snedden, director of Ottawa’s planning services.

“This truly is a poster child for a brownfield grant.

The city’s brownfields redevelopment program awards funds to developers for cleaning up contaminated sites and deteriorating buildings, which helps encourage developers to build in the core rather than the suburbs.

The grant would pay for half of the total projected cost of the cleanup.

Windmill has promised to create a $1.2 billion environmentally friendly community with condos, shops, offices, waterfront parks and pathways on the 15-hectare site, which spans both the Quebec and Ontario sides of the Ottawa River.

The city will only pay for the actual costs of cleanup after the invoices have been verified, Mayor Jim Watson said.

The developer promised to only do the work if they find contamination is present.

“It would be fantastic news for us as the proponent if there’s less contaminants there,” said Jeff Westeinde with Windmill Development Group.

The developer hopes to have the Ottawa part of the development completed in seven or eight years.

Snedden pointed out the city will not  pay to clean up the nearby LeBreton land to allow development because the land is controlled by the federal government.

But the National Capital Commission technically owned about 20 per cent of the Zibi development lands as well said Coun. Catherine McKenney, who argued the federal government should contribute to the cleanup costs.

The NCC owned the lands and had a perpetual lease with Domtar, which operated a paper-mill on the site for nearly 100 years.

“So why are we paying the cost?” asked Peter Stockdale with the Fairlea Community Association.

Some councillors received letters from constituents concerned about the large amount of money going toward a money-making venture.

Capital ward Coun. David Chernushenko acknowledged the grant was “staggeringly” large, but said someone must be responsible for cleaning up contaminated sites.

“I don’t see this as some sort of corporate welfare,” he said.

The grant will still need to be approved by city council.

Chaudière and Victoria islands seen from the air above the Quebec side.

Examples of Groundwater Remediation at National Priorities List Sites

The U.S. EPA recently issued a report that report highlights a select number of example National Priorities List (NPL) sites where EPA has used innovative and established technologies to restore groundwater for use as a source of drinking water. In these examples groundwater was successfully restored for drinking water use at 17 NPL sites and significant progress toward groundwater restoration was made at an additional 13 NPL sites where contaminants remain above safe drinking water levels. These sites demonstrate how the Superfund program can overcome challenges related to difficult contaminants of concern and complex hydrogeologic settings (May 2018, 114 pages).

The report documents where innovative and established technologies have been used to restore groundwater to beneficial use. This report includes a select number of example National Priorities List (NPL) sites where the remedial action objective (RAO) and associated cleanup levels were to restore groundwater for use as a source of drinking water. Groundwater was restored for use as drinking water at 17 NPL sites and significant progress toward groundwater restoration has been made at an additional 13 NPL sites where contaminants remain above safe drinking water levels in only a few groundwater wells. The RAO of restoring groundwater for beneficial use was achieved under the Superfund program, including the successful treatment of groundwater to federal and state maximum contaminant levels for drinking water. These sites are examples of where the Superfund program overcame difficult remediation challenges, such as groundwater contaminated with chlorinated solvents (including the presence of dense non-aqueous phase liquids [DNAPLs]) and complex hydrogeologic settings.

One of 114 Superfund sites in New Jersey, former Edgewater manufacturing site Quanta Resources has been on the National Priorities List since 2002.

The NPL sites discussed in this report were selected based on several criteria, including the use of innovative cleanup technologies or approaches to remedy concentrated groundwater plumes. The most commonly occurring contaminants of concern at these sites were chlorinated volatile organic compounds, which were present at 26 of the 30 sites. The less frequently occurring contaminants included metals, non-chlorinated volatile organic compounds, semivolatile organic compounds, polychlorinated biphenyls, and polycyclic aromatic hydrocarbons, with dioxins or pesticides only present at one site.

The restoration of groundwater was achieved most often by combining remedial technologies. For example, soil excavation and groundwater extraction and treatment (i.e., pump-and-treat) were used to restore groundwater at 17 of the 30 NPL sites. Given that many of these sites were cleaned up during the period from 1983 to 2000, the remedies used at these sites represented state of the art technologies at that time. These traditional technologies were often modified or replaced with innovative technologies such as in situ bioremediation, in situ chemical oxidation (ISCO), in situ thermal treatment (ISTT) or monitored natural attenuation (MNA) at some sites. The application of remedial technologies at these sites decreased contaminant concentrations from 90% up to 99.99% (i.e., one to more than four orders of magnitude).

DNAPLs were found or suspected at eight of the 30 sites. A combination of excavation and pumpand-treat was used most often to remediate these sites along with at least one other technology or approach such as vertical engineered barrier, air sparging, in situ bioremediation, STT, or MNA. Of the eight DNAPL sites, groundwater was restored for use as drinking water at three sites and significant progress towards restoration has been made at five sites. These findings indicate that the Superfund program has achieved the cleanup of sites with DNAPLs.

The time required to restore groundwater for use as drinking water at the 17 NPL sites ranged from three to 27 years with a median time of eight years. Cleanup time generally increased as the amount of contaminant removed increased with the exception of four sites where contaminant concentrations were decreased by nearly 99.99% in less than eight years. Cleanup times were generally shorter for sites with less complex hydrogeologic settings with the exception of three sites with mild heterogeneity that required more than 15 years to restore groundwater. Also, in most cases, cleanup times were shorter for lesser reductions in concentration.

All of the 30 sites, with the exception of two, have achieved the status of sitewide ready for anticipated reuse (SWRAU), and 12 of these sites have been returned to use either in whole or in part. Reuse includes industrial and commercial redevelopment, recreational use, alternative energy use, and lifting of groundwater use restrictions.

View or download at http://www.epa.gov/remedytech/examples-groundwater-remediation-npl-sites.

 

Despite Efforts to Roll-Back Other Program Requirements, U.S. EPA Administrator Scott Pruitt Continues to Prioritize Superfund Cleanups

by Van P. Hilderbrand, Jr. and Marian C. Hwang

 

 

U.S. Environmental Protection Agency (“EPA”) Administrator Scott Pruitt has made it clear that one of his top priorities during his tenure is to expedite cleanups at contaminated sites across the country. To achieve this goal while facing potential budget cuts, he has made several significant decisions over the last year to overhaul and restructure the Superfund cleanup program from within.

First, as we discussed in our earlier post, A New Budget, a New EPA Administrator, and New Uncertainty for Superfund Cleanups, Administrator Pruitt issued a memorandum on May 9, 2017 centralizing decision-making on major Superfund remedies to EPA headquarters. Specifically, final decisions on remedies exceeding $50 million are to be made by Administrator Pruitt or the Deputy Administrator, not by Regional Administrators. According to the memorandum, this change is designed to improve the remedy selection process by promoting increased oversight and accountability and by “enhancing consistency in remedy selection across states and the regions.”

Next, Administrator Pruitt specially convened an EPA Superfund Task Force on May 22, 2017. In our post, EPA’s Task Force Recommendations to Revamp and Expedite Superfund Cleanups and Process – A Welcome Change, we discussed the Task Force Report, issued on July 22, 2017, which identified 5 goals, 13 strategies, and 42 recommendations to (1) expedite Superfund cleanups; (2) re-invigorate responsible party cleanup and reuse; (3) encourage private investment; (4) promote redevelopment and community revitalization; and (5) engage partners and stakeholders. We have seen many of these recommendations realized, including the development and issuance of a priority list of Superfund sites targeted for immediate attention by Administrator Pruitt.

Recent EPA Realignment in Approval Process Sees the Administrator’s Role Expanding

Composite image map showing TRI facilities in blue and Superfund NPL sites in red

In a recent shift to expand the influence of the Administrator’s Office, Administrator Pruitt issued a second memorandum on April 26, 2018 clarifying that EPA’s Office of Land & Emergency Management and regional offices should “coordinate and consult with the Administrator’s Office early on when developing” other significant actions (in addition to remedies) related to costly Superfund cleanups. Such actions would include Amendments to Records of Decision (“ROD”) or Explanations of Significant Differences (“ESD”) that are projected to either increase the estimated cost of a remedy to greater than $50 million or are projected to increase the estimated cost of a remedy that is already greater than $50 million by any amount.

The memorandum also specifically notes that consultations should occur when developing Non-Time-Critical Removal Actions (“NTCRA”) estimated to exceed $50 million. As in the earlier 2017 memorandum, Administrator Pruitt says the additional coordination and cooperation will result in “more accountability and consistency throughout the EPA’s regions.” What this means for potentially responsible parties (“PRPs”) at large Superfund sites is that Administrator Pruitt will play an increasingly important role in the decision-making process.

Neither memorandum addressed any change in the role of the National Remedy Review Board (“NRRB”) and the interplay between the NRRB and the increasing oversight and decision-making role of Administrator Pruitt. The NRRB is an internal EPA peer review group that reviews and comments on remedial actions and NTCRAs costing more than $25 million. Questions remain whether the NRRB only reviews actions costing between $25 and $50 million, as not to impede Administrator Pruitt’s review, or do both NRRB and Administrator Pruitt review actions costing in excess of $50 million?

Uncertainty in the Superfund Program

This step comes amid increased turmoil and uncertainty in the Administrator’s Office and the Superfund program. Administrator Pruitt’s top advisor on the Superfund program and chairman of the Superfund Task Force, Albert “Kell” Kelly, resigned unexpectedly in early May, leaving questions regarding who will run the approximately $1 billion program. Further, Administrator Pruitt himself is facing numerous investigations into his own actions and ethical violations; causing many to wonder just how much longer he will be in his current job and whether he will see any of these policy changes implemented.

It is easy to see, therefore, why every decision from the Administrator’s Office comes under significant scrutiny. Many opponents believe these moves are simply ways to reduce costs and time in the cleanup process, and they question whether “expedited” cleanups actually mean less rigorous cleanups. In his first year or so, there are examples where Administrator Pruitt has approved strengthened measures and cleanup requirements at some sites, despite pushback from industry and companies involved in the cleanup, but there are also examples of site decisions that cast doubt on his ability to be independent and impartial. In any case, as long as Administrator Pruitt is in his current role, it is clear that the Superfund program will see continued change and that he will use the authority of that role to expedite cleanups.

Opinions and conclusions in this post are solely those of the author unless otherwise indicated. The information contained in this blog is general in nature and is not offered and cannot be considered as legal advice for any particular situation. The author has provided the links referenced above for information purposes only and by doing so, does not adopt or incorporate the contents. Any federal tax advice provided in this communication is not intended or written by the author to be used, and cannot be used by the recipient, for the purpose of avoiding penalties which may be imposed on the recipient by the IRS. Please contact the author if you would like to receive written advice in a format which complies with IRS rules and may be relied upon to avoid penalties.

This story is was first published on the Miles Stockbridge website.

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About the authors

member of Miles & Stockbridge Products Liability & Mass Torts Practice Group, Van P. Hilderbrand, Jr. focuses his practice on environmental litigation, regulatory compliance issues, and advising on the environmental aspects of business and real estate transactions. His work also includes consulting on renewable energy project development and project finance transactions, conducting due diligence and assisting with permitting issues. He represents clients in a wide range of industries, including energy, manufacturing, consumer products, pharmaceuticals, chemicals, transportation, technology and real estate.

Marian Hwang has been an environmental attorney with the Miles & Stockbridge since 1987 and chairs its Environmental Practice. The breadth of her experiences representing multinational and national clients enables her to develop practical solutions to complex issues, whether involving complicated real estate/corporate acquisitions or divestitures or commercial financing matters to complex multi-defendant toxic tort claims, litigation, and multi-facility compliance matters. Marian works extensively with and appears before Federal and State regulators, and courts, has been certified as a LEED Green Associate by the U.S. Green Building Council, and has served as outside national environmental counsel to the firm’s major clients.

 

Tax rebate to fund $8.6M cleanup of former Kitchener Frame site

by Catherine Thompson, Waterloo Region Record

As reported by Catherine Thompson in the Waterloo Region Record, It’ll cost about $8.6 million to rid the soil and groundwater of contaminants at the former Kitchener, Ontario Frame site.

The huge industrial site at Homer Watson Boulevard and Bleams Road has been undergoing cleanup for the past three years. The soil and groundwater were contaminated with petroleum hydrocarbons, volatile organic compounds, metals, polychlorinated biphenyls (PCBs) and polycyclic aromatic hydrocarbons (PAHs), contaminants that are often found at former industrial sites.

The former Kitchener Frame Site (Photo Credit: Philip Walker/Record staff)

The city and the developers — Gary Ball and Marty Pathak — are keen to see the site redeveloped, said Rob Morgan, the City of Kitchener’s co-ordinator of development of former industrial sites. The site of the auto parts plant variously known as Budd Canada, ThyssenKrupp Budd Canada and Kitchener Frame, has been vacant since 2009.

Redevelopment of the sprawling 32-hectare site will give a big boost to the city’s supply of industrial land, Morgan said. About 16 hectares are slated industrial, 10 hectares are retail and 1.5 hectares are office. Another four hectares will be used for things like roads and storm water management.

“It’s much-needed land,” Morgan said. “Kitchener doesn’t have a lot of vacant industrial land left to offer.” There’s a couple of parcels, on Shirley Avenue and Strasburg Road, but not much else, he said.

The developers have applied to the city and region for grants under a program to encourage remediation of contaminated land.

The former Kitchener Frame site would be the biggest property ever to apply for the program, Morgan said.

Under the program, a developer cleans up a site and redevelops it. The new development generates far more taxes than the vacant land had. The city and region hand over the additional tax revenue to the developer for a set number of years, to repay the cost of the environmental cleanup.

The site now has an assessed value of $8 million, and generates about $108,000 in property taxes a year, split roughly 40-60 between the city and the Region of Waterloo. Once it’s cleaned up and redeveloped, it’s expected to have an assessed value of around $112 million, and generate $2.2 million in municipal property taxes.

“It’s a great program,” Morgan said. In exchange for foregoing the increased taxes for a certain number of years, the city gets vacant land cleaned up and converted to a productive use that generates more taxes and jobs.

“These lands are sitting dormant, contaminated, sometimes for many years. As a resident I’d rather see it cleaned up and earning money for the tax base.”

The Kitchener Frame site will be split into 11 different parcels from 1.3 to 10 hectares. Kitchener doesn’t expect to see the first new development on the site until about 2020, and development could continue for the next 10 or 15 years beyond that.

Morgan thinks it’s likely the property will be developed well before then, though. “They’ve got a lot of interest in that property. It’s a great location, because of its proximity to the 401; you’ve got a lot of variety in the lots; Kitchener has a strong manufacturing base, and we’ve got a lot of skilled workers.”

City staff are recommending that Kitchener council approve the application, which must also be approved by regional council, likely in June.

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About the Author

Catherine Thompson covers Kitchener City Hall for the Waterloo Region Record.

Controlling cleanup costs for contaminated land

by Dr. Harm Gross, Western Investor

As reported by Dr. Harm Gross in the Western Investor, in British Columbia, the cost of contaminated site cleanup has grown steadily since the Contaminated Site Regulation became law on April 1, 1997. There are several reasons for this change, some of which are under the control of “persons responsible”, chiefly landowners.

An uncontrollable cost factor is the proliferation of regulations, which ballooned to an estimated 10,000 double-sided pages in British Columbia. On November 1, 2017, Stage 10 omnibus amendments to the CSR came into effect, changing concentrations deemed harmful for a broad range of contaminants and adding a significant number of new ones. This meant that work before that date would become non-compliant overnight, causing environmental consulting companies to rush over 100 submissions for a Certificate of Compliance before this deadline to grandfather their work and avoid additional costs for their clients.

Regulations pertaining to contaminated sites are not just evolving in British Columbia, but have seen substantial updates across Canada in recent years.

Saskatchewan’s updated Environmental Management and Protection Act came into effect in June 2015. This legislation thoroughly overhauled the old Act by introducing a new impacted sites registry and by providing the regulator with more power to order persons responsible to conduct site assessments.

New guidelines were also introduced in Alberta, where the regulator released a new Environmental Site Assessment Standard in March 2016.

Manitoba enacted amendments to the Province’s Contaminated Sites Remediation Regulation in April 2014. While the intended aim of these new regulations and guidelines is to move the focus towards results-based frameworks, any change and expansion of rules inevitably leads to uncertainty for stakeholders. Uncertainty particularly stems from the need of establishing precedent with the regulator when the new rules are applied in the real world. It is up to the consultant to successfully navigate their clients through the new reality and reduce uncertainty. The consultant’s knowledge of the regulations, and proficiency in correctly interpreting and applying new rules, can have significant impacts on the accuracy of cost estimates and actual costs for site assessments and remedial work.

Former bulk fuel storage leak, North Vancouver, BC

With regulations in flux and frequent changes in rules, the potential for lowering and accurately predicting costs for site remediation projects is thus of great interest to responsible persons. The potential savings by inviting an experienced review of proposed remediation plans can be significant. At one site the savings for a client was $15 million; more commonly, savings are in the 6-figure or low 7-figure range. Incorrect investigative work is the most frequent source of error. This ranges from faulty field techniques when sampling groundwater wells, through unfamiliarity with laboratory methods for distinguishing man-made from naturally occurring substances, to inadequate comprehension of the myriad environmental regulations. Investigating contaminants requires great care when the difference between contamination and no contamination is measured at the extremely low concentrations of parts per million in soil, or the even lower concentrations of parts per billion in water. We have seen numerous examples where mistakes have tarred a site.

The public sector is no less prone to erroneous estimations of remediation cost. In April 2014, the parliamentary budget officer reported that the federal government has underestimated the cost of cleaning up contaminated sites under its jurisdiction by at least $2 billion, putting the total liability for contaminated sites to almost $7 billion. This was due to the fact that many sites in the inventory had yet to be assessed. While it seems relatively self-evident that proper site investigations are a prerequisite and absolute must for cost estimates to be accurate, such oversights are unfortunately abundant in the private sector. All too often consultants provide flimsy cost estimates based on incomplete or deficient investigative data.

Businesspeople frequently complain about the irritation of unreliable cost estimates, and rightfully so – nowhere is this more prevalent than in the environmental consulting industry.

Technical experts are often loathe to accept responsibility for cost estimates for fear of finding undiscovered contamination, running into regulatory snafus or overlooking issues which later prove substantial.

Next Environmental has taken the unprecedented step of providing fixed price quotes for a comprehensive scope of work at each step of investigation or remediation, thus entirely eliminating the cost uncertainties for clients. This service, unique in the contaminated sites business, is possible due to the skillful application of regulatory proficiency to address the business needs of clients. Time will tell whether this cost control measure spreads to other firms.

This article was originally published in Western Investor.

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About the Author

Dr. Harm Gross is the owner and President NEXT Environmental Inc.  He is currently a Registered Professional Biologist (R.P.Bio) and an Approved Professional of the Contaminated Sites Approved Professionals Society (CSAP Society), and has a wealth of experience obtaining Ministry Instruments and other environmental certifications for NEXT’s Clients. NEXT provides environmental consulting services including investigation, remediation and risk assessment of contaminated property for clients throughout BC and Alberta.

 

Activated Carbon-Based Technology for In Situ Subsurface Remediation

The U.S. EPA Office of Superfund Remediation and Technology Innovation recently published a fact sheet about an emerging remedial technology that applies a combination of activated carbon (AC) and chemical and/or biological amendments for in situ remediation of soil and groundwater contaminated by organic contaminants, primarily petroleum hydrocarbons and chlorinated solvents.  The technology typically is designed to carry out two contaminant removal processes: adsorption by AC and destruction by chemical and/or biological amendments.

With the development of several commercially available AC-based products, this remedial technology has been applied with increasing frequency at contaminated sites across the country, including numerous leaking underground storage tank (LUST) and dry cleaner sites (Simon 2015).  It also has been recently applied at several Superfund sites, and federal facility sites that are not on the National Priorities List.

The fact sheet provides information to practitioners and regulators for a better understanding of the science and current practice of AC-based remedial technologies for in situ applications. The uncertainties associated with the applications and performance of the technology also are discussed.

AC-based technology applies a composite or mixture of AC and chemical and/or biological amendments that commonly are used in a range of in situ treatment technologies.  Presently, five commercial AC-based products have been applied for in situ subsurface remediation in the U.S.: BOS-100® & 200® (RPI), COGAC® (Remington Technologies), and PlumeStop® (Regenesis) are the four most commonly used commercial products.  CAT-100® from RPI is the most recent product, developed based on BOS-100®.  One research group in Germany also developed a product called Carbo-Iron®.  The AC components of these products typically are acquired from specialized AC manufacturers.  These types of AC have desired adsorption properties for chlorinated solvents and petroleum hydrocarbons.  Different products also have different AC particle sizes, which determine the suitable injection approach and the applicable range of geological settings.

Example of powdered activated carbon “fracked” into the subsurface under high-pressure, causing preferential pathways into existing monitoring wells (Photo Credit: Regenesis)

 

In Situ Treatment Performance Monitoring: Issues and Best Practices

The U.S. EPA recently released an issue paper (EPA 542-F-18-002) that describes how in situ treatment technologies may impact sampling and analysis results.  The paper discusses the best practices to identify and mitigate issues that may affect sampling and analysis.

The utility of monitoring wells for performance or attainment monitoring is based on the premise that contaminant concentrations measured in the wells are representative of aquifer conditions. However, during in situ treatment, various biogeochemical and hydrogeological processes and sampling and analysis procedures may affect the representativeness of the monitoring well and sample quality, which may not be adequately considered in current remediation practice.

A properly designed monitoring network that anticipates the distribution of amendments after injection would minimize impacts to monitoring wells.  However, predicting amendment distribution prior to injection is challenging such that impacts to monitoring wells are likely.

The purpose of The U.S. EPA issue paper is to:
• describe how in situ treatment technologies may impact sampling and analysis results used to monitor treatment performance; and
• provide best practices to identify and mitigate issues that may affect sampling or analysis.

The U.S. EPA issue  paper discusses eight potential sampling or analytical issues associated with groundwater monitoring at sites where in situ treatment technologies are applied. These issues are grouped under three topic areas:
• Issues related to monitoring wells (Section 2).
• Representativeness of monitoring wells (Section 3).
• Post-sampling artifacts (Section 4).

The paper presents issues that pertain to collecting water samples directly from a monitoring well and does not discuss the use of other sampling techniques, such as passive diffusion bags or direct push groundwater sampling.

Clean-up of Radioactive Material in Port Hope Finally Underway

After decades of study and planning, the clean-up or radioactive contamination in the community of Port Hope, Ontario is finally underway.  The Town of Port Hope, located approximately 100 km (60 miles) east on Toronto on Lake Ontario, has an estimated 1.2 million cubic metres (1.5 million cubic yards) of historic low-level radioactive waste scattered at various sites throughout the town.

The contaminated soil and material will be excavated to moved to the LongTerm Waste Management Facility, which is essentially an engineered aboveground landfill where the waste will be safely contained, and the long-term monitoring and maintenance of the new waste management facility.

Other historic low-level radioactive waste – primarily soil contaminated with residue ore from the former radium and uranium refining activities of Eldorado Nuclear — and specified industrial waste from various sites in urban Port Hope will be removed and safely transported to the new facility.

The historic low-level radioactive waste and contaminated soil, located at various sites in the Municipality of
Port Hope, are a consequence of past practices involving the refining of radium and uranium by a former federal Crown Corporation, Eldorado Nuclear Limited, and its private-sector predecessors. These waste materials contain radium-226, uranium, arsenic and other contaminants resulting from the refining process.

The historic waste and surrounding environment are monitored and inspected regularly to ensure the waste does not pose a risk to health or the environment. As part of the Port Hope Area Initiative (PHAI) construction and clean-up phase, the waste will be excavated and relocated to the new Port Hope long-term waste management facility.

In an interview with CBC, Scott Parnell is the General Manager of the Port Hope Area Initiative, which is in charge of the cleanup. He says that after decades of planning, the first loads of an estimated 1.2 million cubic metres of historic low-level radioactive waste will be on the move.

Scott Parnell, general manager of the Port Hope Area Initiative, stands near the town’s harbour.

“There’s been a lot of planning a lot of studies a lot of determination into how to approach the work safely, but this will be the first time we will be removing waste from the community,” said Parnell, who has overseen similar operations in Washington state and Alaska.

The $1.28-billion cleanup operation is a recognition by the federal government that the waste is its “environmental liability.” The radioactive tailings were the byproduct of uranium and radium refining operations run by Eldorado, a former Crown corporation, between 1933 and 1988.

Parnell says that the tailings were given away for free, which helps explain how the contamination was spread through the town.

“So, basically they offered it up and it was used for fill material to level up people’s backyards, for building foundations, for those kinds of things. So, that’s how the material got spread around the community,” Parnell said.

Parnell says an estimated 800 properties may be affected, but says there’s no indication the low levels of radiation are dangerous.

“There’s little human risk associated with the waste that’s identified here in Port Hope,” he said.

The first wastes to be remediated are currently stored under tarps at three locations including the Centre Pier, the Pine Street North Extension in the Highland Drive Landfill area and at the municipal sewage treatment plant. The Centre Pier is the first site to be remediated.

Aerial image of the first locations to be remediated. (source: Canadian Nuclear Laboratories)

 

 

Chemical and Biological Remediation Tetrachloroethene – Case Study

Tetrachloroethene is the systematic name for tetrachloroethylene, or perchloroethylene (“perc” or “PERC”), and many other names.  It is a manufactured chemical that is widely used in the dry-cleaning of fabrics, including clothes. It is also used for degreasing metal parts and in manufacturing other chemicals. Tetrachloroethene is found in consumer products, including some paint and spot removers, water repellents, brake and wood cleaners, glues, and suede protectors.

Tetrachloroethene is a common soil contaminant. With a specific gravity greater than 1, tetrachloroethylene will be present as a dense nonaqueous phase liquid(DNAPL) if sufficient quantities are released. Because of its mobility in groundwater, its toxicity at low levels, and its density (which causes it to sink below the water table), cleanup activities are more difficult than for oil spills (which has a specific gravity less than 1).

In the case study, researchers from Manchester Geomicro, a geo-microbiology and molecular environmental science research group affiliated with the University of Manchester, used combined chemical and microbiological contaminant degradation processes to remediate tetrachloroethene at a contaminated site in Germany.

In the study, the researchers used Carbo-Iron®, an applied composite material consisting of colloidal activated carbon and embedded nanoscale zero valent iron (ZVI). In a recent long term study of a field site in Germany, it was injected into an aquifer contaminated with tetrachloroethene (PCE). Carbo-Iron® particles accumulated the pollutants and promoted their reductive dechlorination via a combination of chemical and microbial degradation processes.

Schematic illustrating Carbo-Iron® particle structure and key chemical and microbial dechlorination pathways

The presence of the dominant degradation products ethene and ethane in monitoring wells over the duration of the study indicates the extended life-time of ZVI’s chemical activity in the composite particles. However, the identification of the partial dechlorination product cis-dichlorethene (cis-DCE) at depths between 12.5m and 25m below ground level one year into the study, suggested additional microbially mediated degradation processes were also involved.

Hydrogen produced by the aqueous corrosion of ZVI contributed to a decrease in the redox potential of the groundwater up to 190 days promoting organo-halide reducing conditions that lasted for months after. The long lasting reducing effect of Carbo-Iron® is crucial to efficiently supporting microbial dehalogenation, because growth and activity of these microbes occurs relatively slowly under environmental conditions. Detection of increased levels of cis-DCE in the presence of various organohalide reducing bacteria supported the hypothesis that Carbo-Iron® was able to support microbial dechlorination pathways. Despite the emergence of cis-DCE, it did not accumulate, pointing to the presence of an additional microbial degradation step.

The results of state-of-the-art compound specific isotope analysis in combination with pyrosequencing suggested the oxidative degradation of cis-DCE by microorganism related to Polaromonas sp. Strain JS666. Consequently, the formation of carcinogenic degradation intermediate vinyl chloride was avoided due to the sequential reduction and oxidation processes. Overall, the moderate and slow change of environmental conditions mediated by Carbo-Iron® not only supported organohalide-respiring bacteria, but also created the basis for a subsequent microbial oxidation step.

This study, published in Science of the Total Environment (Vogel et al. 2018, vol. 628-629, 1027-1036) illustrates how microbes and nanomaterials can work in combination for targeted remediation. The work was led by collaborators (Katrin Mackenzie and Maria Vogel) at the Helmholtz Centre for Environmental Research in Leipzig, Germany, and adds to a growing portfolio of research highlighting the potential of Carbo-Iron® as an in situ treatment for contaminated groundwater.

 

Guideline for the Management of Sites Contaminated with Light Non-Aqueous Phase Liquids

Light Non-Aqueous Phase Liquid (LNAPL) Management is the process of LNAPL site assessment, monitoring, LNAPL Conceptual Site Model development, identification and validation of relevant LNAPL concerns, and the possible application of remediation technologies. The presence of LNAPL can create challenges at any site.  Examples of LNAPLs include gasoline, diesel fuel, and petroleum oil.

In 2009, the United States Interstate Technology and Regulatory Council (ITRC) published LNAPL-1: Evaluating Natural Source Zone Depletion at Sites with LNAPL (ITRC 2009b) and LNAPL-2: Evaluating LNAPL Remedial Technologies for Achieving Project Goals (ITRC 2009a) to aid in the understanding, cleanup, and management of LNAPL at thousands of sites with varied uses and complexities. These documents have been effective in assisting implementing agencies, responsible parties, and other practitioners to identify concerns, discriminate between LNAPL composition and saturation-based goals, to screen remedial technologies efficiently, to better define metrics and endpoints for removal of LNAPL to the “maximum extent practicable,” and to move sites toward an acceptable resolution and eventual case closure.

This guidance, LNAPL-3: LNAPL Site Management: LCSM Evolution, Decision Process, and Remedial Technologies, builds upon and supersedes both previous ITRC LNAPL guidance documents in an updated, web-based format. LNAPL-1 and LNAPL-2 are still available for review; however, LNAPL-3 is inclusive of those materials with new topics presented and previous topics elaborated upon and further clarified.

This guidance can be used for any LNAPL site regardless of size and site use and provides a systematic framework to:

  • develop a comprehensive LNAPL Conceptual Site Model (LCSM) for the purpose of identifying specific LNAPL concerns;
  • establish appropriate LNAPL remedial goals and specific, measurable, attainable, relevant, and timely (SMART) objectives for identified LNAPL concerns that may warrant remedial consideration;
  • inform stakeholders of the applicability and capability of various LNAPL remedial technologies
  • select remedial technologies that will best achieve the LNAPL remedial goals for a site, in the context of the identified LNAPL concerns and conditions;
  • describe the process for transitioning between LNAPL strategies or technologies as the site moves through investigation, cleanup, and beyond; and
  • evaluate the implemented remedial technologies to measure progress toward an identified technology specific endpoint.

Initial development and continued refinement of the LCSM is important to the identification and ultimate abatement of site-specific LNAPL concerns. Figure 1-1 identifies the stepwise evolution of the LCSM, the specific purpose of each LCSM phase, and the tools presented within this guidance to aid in the development of the LCSM. As depicted, the LCSM is the driving force for identifying actions to bring an LNAPL site to regulatory closure.

LNAPL remediation process and evolution of the LNAPL conceptual site model (LCSM).

This guidance document is organized into sections that lead you through the LNAPL site management process:

  • Section 2 – LNAPL Regulatory Context, Challenges, and Outreach
    Section 2 identifies some of the challenges implementing agencies face when investigating, evaluating, or remediating LNAPL sites. These challenges include regulatory or guidance constraints, a lack of familiarity or understanding of LNAPL issues, and poorly or undefined objectives and strategies. This section also stresses the importance of identifying and communicating with stakeholders early in the process in order to address issues or concerns that can lead to delays or changes in strategy. Understanding and recognizing these challenges and concerns during development of a comprehensive LCSM can help reduce costs and lead to a more effective and efficient resolution at an LNAPL site.
  • Section 3 – Key LNAPL Concepts
    Section 3 provides an overview of key LNAPL terminology and concepts including LNAPL behavior following a release to the subsurface (i.e., how LNAPL spreads away from the primary release point, its behavior above and below the water table, and how its migration eventually stops and naturally depletes). An understanding of these basic terms and concepts is crucial for developing a comprehensive LCSM and an effective LNAPL management plan.
  • Section 4 – LNAPL Conceptual Site Model (LCSM)
    The LCSM is a component of the overall conceptual site model (CSM), and emphasizes the concern source (i.e., the LNAPL) of the CSM. The presence of LNAPL necessitates an additional level of site understanding. The unique elements of the LCSM are presented as a series of questions for the user to answer to help build their site-specific LCSM. Ultimately, a thoroughly-developed, initial LCSM provides the basis for identifying the LNAPL concerns associated with an LNAPL release.
  • Section 5 – LNAPL Concerns, Remedial Goals, Remediation Objectives, and Remedial Technology Groups
    Section 5 describes the decision process for identifying LNAPL concerns, verifying concerns through the application of threshold metrics, establishing LNAPL remedial goals, and determining LNAPL remediation objectives. This section also introduces remedial technology groups, the concept of a treatment train approach, and how to transition between technologies to address the identified LNAPL concern(s) systematically and effectively. It is important to understand the content of this section prior to selecting and implementing an LNAPL remedial strategy.
  • Section 6 – LNAPL Remedial Technology Selection
    Section 6 describes the remedial technology screening, selection, and performance monitoring process. This section begins by identifying technologies recognized as effective for mitigating specific LNAPL concerns and achieving site-specific LNAPL remediation objectives based on the collective experience of the LNAPL Update Team. The LNAPL Technologies Appendix summarizes each of the technologies in detail and presents a systematic framework to aid the user in screening out technologies that are unlikely to be effective, ultimately leading to selection of the most appropriate technology(ies) to address the specific LNAPL concerns.

This guidance also includes relevant, state-of-the-science appendices for more detailed information on LNAPL specific topics:

  • LNAPL Technologies Appendix 
    This appendix describes in more detail each of the 21 LNAPL technologies introduced in the main document. The A-series tables describe information to evaluate the potential effectiveness of each technology for achieving LNAPL goals under site-specific conditions. Information includes the basic remediation process of each technology, the applicability of each technology to specific remedial goals, and technology-specific geologic screening factors. The B-series tables describe information to evaluate the potential implementability of each technology considering the most common site-specific factors. The C-series tables describe the minimum data requirements to make a final technology selection through bench-scale, pilot, and/or full-scale testing; they also describe metrics for tracking remedial technology performance and progress.
  • Natural Source Zone Depletion (NSZD) Appendix
    This appendix provides a technical overview of NSZD for LNAPL and the methods by which rates can be estimated and measured. It also provides a discussion of long-term LNAPL site management and how NSZD can be applied as a remedy including decision charts to support integration of NSZD and case studies demonstrating its use. For this document, the original ITRC NSZD document (ITRC LNAPL-1) was updated and incorporated into the main body and appendix.
  • Transmissivity (Tn) Appendix
    LNAPL transmissivity has application throughout the life cycle of a LNAPL project. This appendix provides an understanding of how transmissivity connects to the broader framework for LNAPL management including LNAPL recovery and mobility, and the potential for NSZD to decrease LNAPL transmissivity and mobility over time.
  • Fractured Rock Appendix
    This appendix describes the behavior and differences of how LNAPL behaves in fractured bedrock formations. While some of the same physical principles apply for multiphase flow in fractured aquifers as in porous aquifers, unique characteristics of finite and restricted fluid flow paths can lead to unexpected results in fractured settings.
  • LNAPL Sheens Appendix
    This appendix details how LNAPL sheens form, the concerns and challenges of sheens, and potential sheen mitigation technologies.

LNAPL Contamination of the Subsurface

Events

Best Practices for Site Characterization throughout the Remediation Process

 

Event Name: Best Practices for Site Characterization Throughout the Remediation Process
Hosted By: U.S. EPA
Office of Superfund Remediation and Technology Innovation
Description: Best Practices for Site Characterization Throughout the Remediation Process is based on best management practices (BMP) implemented by the U.S. Environmental Protection Agency (EPA), partnership organizations, federal and state partners, and consultants. Participants will learn how to streamline projects in a legal, technically sound, and cost-effective manner. By taking the course, participants achieve the following objectives:

  • Integrate best practices into traditional project activities. This course illustrates how to use more effective sampling plan design, data collection, analysis, and management strategies at various entry points in a typical project time-line. The course highlights emerging quality assurance and quality control methods for evaluating data sufficiency and optimizing project sequencing. Case studies highlight benefits of using best practices at hazardous waste sites.
  • Effectively collect and communicate critical project information. The course stresses the use of the systematic planning process to involve key stakeholders and develop the conceptual site model (CSM). The course provides examples of CSMs and describes how they are used as the basis for project and sampling plan design, and as a tool for maintaining stakeholder consensus throughout the project life cycle. Participants will be shown how comprehensive systematic planning extends beyond normal data quality models. The course examines tools for managing the uncertainties associated with sampling, social, economic, and political factors that significantly impact hazardous waste cleanup and reuse projects.
  • Design dynamic work strategies. Systematic planning provides the foundation for designing effective dynamic work strategies (DWS). The course describes the components of a DWS, including (1) methods for verifying performance, (2) using collaborative data sets, (3) methods for real-time decision making, (4) managing sample and small-scale variability, (5) designing project and field decision logic, (6) implementing contingencies, and (7) creating streamlined work plans.
  • Recognize and overcome the challenges presented while implementing a dynamic work strategy. Controlling a project during a DWS is challenging and involves communication and planning. Participants will learn how to manage and adjust programs in the field while maintaining the project’s integrity. The course describes methods for controlling and directing work during dynamic work efforts, which include using unitized costing, setting project ceilings, and lowering project costs. Participants will examine how more focused characterization efforts can extend project funds and maximize the data collected.
  • Use BMPs to support all phases of the environmental cleanup life cycle. In addition to supporting site characterization, site characterization and remediation BMPs can directly support risk assessment, technology selection, remedial design, remedy implementation, long-term operations, and optimization efforts. The course describes specific ways practitioners can apply the BMPs to support these major project phases.

Course Outline

  1. Overview of Best Practices for Site Characterization and Remediation
  2. Systematic Project Planning
  3. Developing Dynamic Work Strategies
  4. Implementing a Dynamic Field Investigation
  5. Risk Assessment and Real-Time Data
  6. Best Practices for Remedy Design and Implementation
Registration Status: Registration Open
Event Begins: December 03, 2018 at 1:00 PM
Event Ends: December 06, 2018 at 12:00 PM
For questions about this event, please contact: Jodi McCarty (ICF)
Phone: 773-934-3091
E-mail: jodi.mccarty@icf.com
Additional Information: Daily Class Times:
Monday – 1:00 PM to 4:30 PM
Tuesday – 8:30 AM to 4:30 PM
Wednesday – 8:30 AM to 4:30 PM
Thursday – 8:30 AM to 12:00 PM
Location
This event will be held at: U.S. EPA – Region 1
5 Post Office Sq.
1st Fl. Conference Center – Leighton Hall
Boston, MA 02109

Location Contact:
Cosmo Caterino
617-918-1264
caterino.cosmo@epa.gov

Location Map:
These maps are for getting a general idea of the location – they may not be 100% accurate.
Click here to view 

 

Remediation Technologies Symposium 2018

The Remediation Technologies Symposium 2018 (RemTech™ 2018) is the premier remediation technology transfer event for environmental professionals, encompassing the latest innovations in soil and groundwater remediation.

Building on the overwhelming success of last year’s event, RemTech™ 2018 is expected to exceed the standards set by its predecessor. Offering a larger, more diversified program, with additional keynote speeches and networking sessions, this is an event you won’t want to miss!

Considerable work is conducted in the field of contamination remediation and industrial pollutant treatments. RemTech™ 2018 provides a forum for industry experts to present these leading edge technologies. Co-sponsors and participating organizations include government, academic institutions, and private sector organizations active in site remediation, research and application.

Who Should Attend?

Attendance at RemTech™ 2018 is highly recommended for all industry sectors that have a professional interest in the remediation of contaminated sites including:

Engineering Firms, Drilling Companies, Pipeline Companies, Natural Gas Producers, Energy Marketers, Environmental Consulting Firms, Land Developers, Governmental/Regulatory Bodies, Aboriginal Groups, Oil and Gas Service Companies, Law Firms, Financiers, Mining Companies, Waste Brokers and Managers, etc…

About the Host

Established in 1987, the Environmental Services Association of Alberta (ESAA) is one of Canada’s leading business associations with over 250 member companies. Dedicated to building a strong environmental industry, ESAA is an industry association with a business approach in providing programs that lead to its members’ corporate success. Visit our website for more information: www.esaa.org

Symposium Program

The three-day technical program will consist of a minimum of 70 platform presentations grouped into sessions chaired by leaders in environmental remediation research and application. Additional workshops are also planned.

The program will be developed from abstracts collected from across North America. A full listing of abstracts and presenter biographies will be available in the near future.

Some areas and case studies being covered in the presentations will include:

In-Situ Treatment Methods, Ex-Situ Treatment Methods, Biological Treatment, Non-Biological Treatment, Thermal Desorption, Encapsulation, Natural Attenuation, Multi-Phase Extraction, Solar Detoxification, Electrochemical Remediation, Pre-Treatment Considerations, Phytoremediation, Environmental Management, Hydrocarbon and Salt Contamination, Stabilization and Containment, Commercial Situations, Membrane Technology, Unique and Challenging Locations

In addition to the detailed technical program, RemTech™ 2018 will also include various networking sessions, keynote speakers, a welcoming reception and an expanded commercial exhibition area.