City of Brantford gets loan for completed brownfield project

As reported by Susan Gamble in the Brantford Expositor, The City of Brantford, Ontario is securing a $4.6 million load to cover the expenses related to the remediation of the Sydenham Pearl Brownfield Site.

The site has already been remediated. City Councillors recently voted in favour of the $4.6 million debenture from the Ontario Infrastructure and Lands Corporation with a 20-year interest rate of 3.4 per cent. The agreement will mean the city repays the loan at a rate of $322,878 a year.

The debenture was approved, along with the project, in 2012 and the remediation at the site is complete, but the money has to be returned to the city’s capital project fund, which has been fronting the money.

Joelle Daniels, the city’s director of finance, explained to the Brantford Expositor that the city had been able to finance the costs of the project over the last six years from working capital since the cash flow was available.

“Typically we have an interim balance and that allows us to not issue the debenture until we know the final cost of the project. We wouldn’t have wanted to borrow the money up front and then carry the interest longer.”

The city has about a dozen outstanding debentures, most of them with the Ontario Infrastructure Lands Corporation but others through the Federation of Canadian Municipalities or regular lending institutions.

The Sydenham-Pearl Brownfield Site is a 6 acre property that had most recently owned by two industrial companies, namely Domtar and Crown Electric, which is surrounded by residential properties, a public playground, a vacant school property, and a rail line.


Crown Electric Manufacturing 17 Sydenham Street
Image Source: (City of Brantford Records Department)

Prior to remediation, soil testing and groundwater testing had shown high levels of industrial chemicals, including but not limited to trichloroethylene and its breakdown products, ethylbenzene and vinyl chloride. 

As is the case with many brownfields, the Sydenham-Pearl Brownfield site has its history rooted in industrial purposes.  The properties have changed hands many times over the course of several decades, and have survived many changes in environmental policies.  Policies including the disposal of hazardous waste and even what chemicals are considered to be hazardous in the first place.

The remediation took 8 weeks to complete and included: the removal of underground storage tanks; excavation and offsite disposal of petroleum hydrocarbons in soil; and in situ soil mixing to break down volatile organic compounds in soil and groundwater.

With remediation activities complete, Phase 3 soil capping and berm construction began. Installation of the soil cap was a requirement of the Ontario Environment Ministry in accordance with the Risk Assessment completed for these properties. Milestone Environmental Contracting completed soil capping and berm construction.

Work at the Sydenham Pearl Brownfield Remediation project was completed in 2017 with required certificates received from the province last spring. The city is currently finishing off sampling and monitoring of the site as required by the Ministry of Environment Conservation and Parks.

The project, which took in 17 and 22 Sydenham, involved removing more than 3,000 cubic metres of contaminated soil to a provincial landfill.

Formerly the site of Crown Electric and Domtar, which made roofing materials, the site was an eyesore, inhabited by squatters and an invitation for fires.

Large fires in 2001 and 2004 meant the city spent hundreds of thousands of dollars to level buildings and clear the area. The properties were seized for tax sales and a remediation plan was created.

Milestone Environmental Contracting spent $2.4 million of the budget on the remediation and another $2.2 million was set aside for the greening process and contingency funding.

The Uses of 3D Modeling Technology in the Environmental Remediation Industry

By: Matt Lyter (Senior Staff Geologist at St-John-Mitterhauser & Associates, A Terracon Company) and Jim Depa (Senior Project Manager/3D Visualization Manager at St-John-Mitterhauser & Associates, A Terracon Company)

Three-dimensional (3D) modeling technology is used by geologists and engineers in the economic and infrastructure industries to help organize and visualize large amounts of data collected from fieldwork investigations.  In the oil and gas industry, petroleum geologists use 3D models to visualize complex geologic features in the subsurface in order to find structural traps for oil and natural gas reserves.  In the construction industry, engineers use 3D maps and models to help predict the mechanics of the soil and the strength of bedrock for construction projects.  In the mining industry, economic geologists use high resolution 3D models to estimate the value of naturally occurring ore deposits, like gold, copper, and platinum, in a practice known as resource modeling.

All of the models are built in almost the same exact way: 1) By collecting and analyzing soil samples and/or rock cores; 2) Using a computer program to statistically analyze the resulting data to create hundreds or even thousands of new (or inferred) data points; and 3) Visualizing the actual and inferred data to create a detailed picture of the ground or subsurface in three dimensions.  These models can be used in the economic and infrastructure industries to help predict the best locations to install an oil or gas well, predict the size of an oil or natural gas reserve, assist in the design of a road, tunnel, or landfill, calculate the amount of overburden material needing to be excavated, or help to predict the economic viability of a subsurface exploration project.

However, because of the significant amount of computing power needed to create the models, usage of the technology by regulatory driven industries has been limited.  But continuing technological advancements have recently made 3D modeling technology more accessible and affordable for these regulatory driven industries, including the environmental investigation and remediation industry.  Complex 3D models that previously may have taken several days to create using expensive high-end computers, can now be made in several hours (or even minutes) using the technology present in most commercially available desktops.  Because of these advancements, subsurface contamination caused by chemical spills can be visualized and modeled in 3D by environmental geologists at a reasonable price and even in near real-time.

3D Models of Soil Contamination

Some of the applications of 3D modeling technology in the environmental investigation and remediation industry are only just beginning to be utilized, but they have already helped to: 1) Identify data gaps from subsurface investigations, 2) Describe and depict the relationship between the geologic setting of a site and underground migration of a contaminant, and 3) Provide a more accurate estimate of the amount of contamination in the subsurface.  The models have also helped contractors design more efficient remediation systems, assisted governmental regulators in decision making, and aided the legal industry by explaining complex geologic concepts to the non-scientific community.  This is especially true when short animations are created using the models, which can show the data at multiple angles and perspectives – revealing complexities in the subsurface that static two-dimensional images never could.

The consultants at St. John-Mittelhauser and Associates, a Terracon Company (SMA), have used 3D modeling technology on dozens of sites across the United States, most recently, at a large-scale environmental remediation project in the Midwestern United States.  Contamination from spills of trichloroethylene (TCE), a once widely used metal degreaser, were identified at a former auto parts manufacturer during a routine Phase 2 investigation.  Dozens of soil samples were collected and analyzed in order to define the extent of contamination, and once completed, traditional 2D maps and a series of cross-sections were created.  One of the cross sections is shown in the image below:

Cross-section of soil contamination

Traditional Cross-section Showing Geologic Units and Soil Sample Results

The maps and cross sections were presented to remediation contractors with the purpose of designing a remediation system precisely based on treating only the extent of the contaminated soil.  The lowest bid received was for $4.2 million dollars (USD), however, it was evident to SMA that all of the proposed designs failed to take into account the complexity of the subsurface contamination.  Specifically, large portions of the Site, which were not contaminated, were being proposed to be treated.  Therefore, using a 3D dimensional modeling program, SMA visualized the soil sample locations, modeled the extent of the contaminated soil in 3D, and created an animation showing the model at multiple perspectives and angles, at a cost of $12,000 (USD).  A screenshot of the model is provided below:

3D dimensional modeling program results

3D Side View of TCE Contamination in Soil (15 PPM in Green, 250 PPM in Orange)

The project was resubmitted to the remediation contractors with the 3D models and animation included, resulting in a guaranteed fixed-price bid of $3.1 million dollars – a cost savings of over $1.1 million dollars for the client. Additionally, an animation showing both the remedial design plan and confirmatory sampling plan was created and presented to the United States Environmental Protection Agency (the regulatory agency reviewing the project) and was approved without any modifications.  To date, the remediation system has removed over 4,200 pounds of TCE from the subsurface and completion of the project is expected in 2019.  A short animation of the 3D model can be viewed on YouTube.


3D Models Showing PCE Contamination in Soil

The 3D modeling software has also been used to help determine the most cost-effective solution for other remediation projects, and has been able to identify (and clearly present) the sources of chemical spills.  The following link is an animation showing three case studies involving spills of perchloroethene (a common industrial solvent) at a chemical storage facility, ink manufacturer, and former dry cleaner: https://www.youtube.com/watch?v=0IlN_TIXkGk

The most cost-effective remediation option was different for each site and was based on the magnitude of the contamination, maximum depth of contaminated soil, geologic setting, and the 3D modeled extent of contamination.  Specifically, the contamination at the chemical storage facility was treated using electrical resistance heating technology, chemical oxidants were used to treat the soils at the ink manufacturer, and soil vapor extraction technology was used at the dry cleaner.

However, several barriers remain which prevent the wide-spread use of 3D modeling technology.  The various modeling programs can cost upwards of $20,000, as well as yearly fees for software maintenance.  There are also costs to organize large datasets, build the necessary files, and create the models and animations.  It also must be noted that the 3D models are only statistical predictions of site conditions based on the available data, and the accuracy of the models is wholly dependent on the quantity, and more importantly, the quality of the data.  Even so, 3D modeling technology has proven to play an important role in the environmental remediation industry by helping project managers to understand their sites more thoroughly.  It has also provided a way to disseminate large amounts information to contractors, regulators, and the general public. But, perhaps, most-importantly, it has saved money for clients.


About the Authors

Matt Lyter (Senior Staff Geologist at St-John-Mitterhauser & Associate, A Terracon Company) provides clients with a wide range of environmental consulting services (Environmental litigation support; acquisition and transaction support; site specific risk assessment, etc.), conventional and state-of-the-art environmental Investigation services, and traditional to advanced environmental remediation services.

Jim Depa (Senior Project Manager/3D Visualization Manager at St-John-Mitterhauser & Associate, A Terracon Company) has over 12 years of experience as a field geologist, project manager, and 3D modeler.  He is well-versed with a variety of computer programs including: C-Tech’s Earth Volumetric Studio (EVS), Esri’s ArcGIS, AQTESOLV, MAROS, Power Director 16, and Earthsoft’s EQuIS

Bioremediation: Global Markets and Technologies to 2023

A report issued by BCC Research provides an overview of the global markets and technologies of the bioremediation industry. The report predicts that the global bioremediation market should grow from $91.0 billion in 2018 to $186.3 billion by 2023, increasing at a compound annual growth rate (CAGR) of 15.4% from 2018 through 2023.

One of the finding of the report is that the application of bioremediation technology in the water bodies sector held the largest market share in 2017, and it is expected to remain the market leader throughout the forecast period.

The report predicts an ever-increasing use of bioremediation techniques for treating sewage, lakes, rivers and streams, ponds and aqua culture is anticipated to create huge growth opportunities for the market in the coming years. In recent years, however, the rise in the agriculture industries has augmented the growth of hazardous pollutants in the environment, and thus the application of bioremediation methods in the agricultural sector is expected to be the fastest-growing segment.


Redox zones of a typical contaminant plume (Source: Parsons 2004)

The report breaks down and analyzes the bioremediation market into three categories:

  • By type: In situ and ex situ bioremediation.
  • By application: Water bodies, mining, oil and gas, agriculture, automotive and other industries.
  • By region: North America is segmented into the U.S., Canada and Mexico; Europe is segmented into the U.K., Germany, France, Russia and Rest of Europe; the Asia-Pacific region is segmented into Japan, India, China and Rest of Asia-Pacific; and the Rest of the World (ROW) covers Latin America, Middle East and Africa.

The report provides estimated values used are based on manufacturers’ total revenues. Projected and forecast revenue values are in constant U.S. dollars unadjusted for inflation.

This report also includes a patent analysis and a listing of company profiles for key players in the bioremediation market.

Similar Reports

In 2014, a team of United Kingdom researchers at University of Nottingham and Heriot-Watt University issued the results of a global survey on the use of bioremediation technologies for addressing environmental pollution problems. The findings of the survey were quite interesting.

Preferred vs. Actual Treatment Method

One of the findings of the UK survey was the difference between the preferred vs. actual treatment method. More than half of respondents (51%) stated that they would prefer to use environmentally friendly approaches including microbial remediation (35%) and phytoremediation (16%). However, historical information suggests the opposite has actually been the case. Considering the relative low cost and low energy requirements of bioremediation technologies, the gulf between aspiration and practice might be due to various factors involving the risk-averse nature of the contaminated-land industry, or difficulties in project design. The latter include identifying appropriate organisms for removing specified contaminants, optimizing environmental conditions for their action, ascertaining extents of eventual clean-up, and the incomplete understanding of all the mechanisms and processes involved. These lead to difficulties in modeling, simulating and/or controlling these processes for improved outcomes.

Application of Bioremediation Techniques

The Figure below compares the broad bioremediation methods being employed within industry according to the 2014 survey, namely monitored natural attenuation (MNA), bio-augmentation and bio-stimulation. The use of low-cost in situ technologies (like MNA) featured quite prominently, particularly in North America and Europe, where it accounts for over 60% of the bioremediation methods being used. This finding points to a strong concern within the developed countries for better maintenance of ecological balance and preventing a disruption of naturally occurring populations.

MNA has been shown to require 1) elaborate modeling, 2) evaluation of contaminant degradation rates and pathways, and 3) a prediction of contaminant concentrations at migration distances and time points downstream of exposure points. This is to determine which natural processes will reduce contaminant concentrations below risk levels before potential courses of exposure are completed, and to confirm that degradation is proceeding at rates consistent with clean-up objectives. These results appear to suggest that regions which employ computational and modeling resources are better able to use low-cost bioremediation technologies like MNA, whereas the others tend to use the more traditional and less cost-effective technologies. In all the continents, researchers were found to favor the use of bio-stimulation methods. Less disruption of ecological balance is apparently a global concern.

Background on Bioremediation

Bioremediation is a method that uses naturally occurring microorganisms such as bacteria, fungi and yeast to degrade or break down hazardous substances into non-toxic or less-toxic substances.Microorganisms eat and digest organic substances for energy and nutrients.

There are certain microorganisms that can dissolve organic substances such as solvents or fuels that are hazardous to the environment.These microorganisms degrade the organic contaminants into less-toxic products, mainly water and carbon dioxide.

The microorganisms must be healthy and active for this to occur.

Bioremediation technology helps microorganisms grow and boosts microbial population by generating optimum environmental conditions. The particular bioremediation technology utilized is determined by various factors, including the site conditions, the presence of type of microorganisms, and the toxicity and quantity of contaminant chemicals.

Bioremediation takes place under anaerobic and aerobic conditions.In the case of aerobic conditions, microorganisms utilize the amount of oxygen present in atmosphere to function.

With a sufficient amount of oxygen, microorganisms transform organic contaminants into water and carbon dioxide. Anaerobic conditions help biological activity in which oxygen is not present so that the microorganisms degrade chemical compounds present in the soil to release the required amount of energy.

Factors of influence in bioremediation processes

Bioremediation technology is used to clean up contaminated water and soil.There are two main types of bioremediation: in situ and ex situ.

The in situ bioremediation process treats the contaminated groundwater or soil in the location where it is found. The ex situ process requires the pumping of groundwater or the excavation of contaminated soil before it can be treated.

In situ bioremediation type is typically segmented as phytoremediation, bioventing, bioleaching, bioslurping, biostimulation and bioaugmentation. The ex situ bioremediation type is typically segmented as composting, controlled solid-phase treatment and slurry-phase biological treatment.

Biodegradation is a cost-effective natural process that is useful for the treatment of organic wastes.The extent of biodegradation is greatly dependent upon the initial concentrations and toxicity of the contaminants, the properties of the contaminated soil, their biodegradability and the specific treatmentsystem selected.

In biodegradation treatment, the targeted contaminants are semi-volatile and nonhalogenated volatile organics and fuels. The benefits of bioremediation, however, are limited at sites with highly chlorinated organics and high concentrations of metals, as they may be harmful to the microorganisms.

https://www.researchandmarkets.com/publication/mkvz6uj/4752244

Using Biosolids to Revegetate Inactive Mine Tailings

Vale Canada (a global mining company with an integrated mine, mill, smelter, and refinery complex in operations Sudbury, Ontario) has been working with Terrapure Environmental (an industrial waste management company) to utilize biosolids on its main tailings area.

For over 100 years, tailings from the milling operation have been deposited in the Copper Cliff Central Tailings impoundment. The facility is still active, but approximately 1,300 hectares are inactive and need reclamation work.


The Big Nickel in Sudbury (Photo Credit: pizzodisevo)

Over the decades, Vale has had some success in revegetation of its tailings area, but there are still large areas of bare or sparsely vegetated tailings, which have led to wind-erosion-management challenges. To control dust, Vale uses agricultural equipment to cover the tailings with straw or hay, as well as a chemical dust suppressant. These practices are costly, and they have to be done continuously to maintain an appropriate cover at all times. In 2012, Vale decided its tailings needed a permanent vegetative cover—not just to suppress dust and reduce erosion, but to improve overall biodiversity. They entered into discussions with Terrapure Organics Solutions (formerly Terratec Environmental) to collaborate on a trial project to apply biosolids on the mine tailings.

In 2012, Vale decided its tailings needed a permanent vegetative cover—not just to suppress dust and reduce erosion, but to improve overall biodiversity. They entered into discussions with Terrapure Organics Solutions (formerly Terratec Environmental) to collaborate on a trial project to apply biosolids on the mine tailings.

The Challenge

The biggest challenge was forging a new path for this type of work. Applying biosolids to mine tailings had never been done before in Ontario. Just to get the right permits and approvals took about two years. Vale Canada and Terrapure worked closely with the Ontario Environment Ministry to ensure standards compliance. Some of this work included helping to determine what those standards should be. Terrapure was able to contribute to these discussions, leveraging decades of expertise in safe biosolids application to agricultural land. Once the Environmental Compliance Approval came in April 2014, the team had to figure out the best application method and proper amount to encourage vegetation, which meant a lot of testing and optimizing.

The Solution

At first, Terrapure mixed biosolids into the surface layer of the tailings. Over time, however, the team learned that applying biosolids to the surface, without mixing, allowed for greater rates of application and coverage at a lower cost.

Terrapure also had to experiment with the right tonnage per hectare. After seeding four trial plots with different amounts of biosolids coverage—20, 40, 60 and 80 dry tonnes/hectare—it was determined that 80 dry tonnes was best for seed germination. At the time, it was the maximum allowable application rate. By the end of 2014, approximately 25 hectares of tailings were amended. Where the biosolids were applied, there were impressive results. Wildlife that had not been seen feeding in the area in years started to return. In 2015, the Ontario Environment Ministry approved an increase in the biosolids application rate to a maximum of 150 dry tonnes/hectare, which was necessary for providing higher organic matter and nutrient levels, and for stabilizing the tailings’ pH levels. This approval also increased the cap on the amount of biosolids that could be delivered to the maximum application rate per hectare. To enhance the program even more, Terrapure and Vale partnered with the City of Greater Sudbury to blend leaf and yard waste with biosolids. By blending these materials, the mixture becomes virtually odourless, its nutrients are more balanced and it allows for a more diverse application.


Glen Watson, Vale’s superintendent of environment, decommissioning and reclamation, surrounded by lush vegetation covering part of the company’s Central Tailings Facility in Sudbury

The Results

As of 2018, Terrapure has successfully covered over 150 hectares of Vale’s tailings with municipal biosolids. Vegetative growth and wildlife are well established on all areas where the team applied organics. Just as importantly, this project has diverted more than 25,000 dry tonnes of valuable biosolids from becoming waste in the landfill. Following the success of the initial trial, the Environment Ministry widened the approval to include all areas of the inactive tailings and a portion of the active tailings. At the current application rate of 150 dry tonnes/hectare, Vale’s central tailings facility could potentially require another 195,000 dry tonnes of biosolids. That’s more than 30 years of biosolids utilization, at an annual rate of 6,000 dry tonnes of material. Needless to say, Vale is very pleased with the results, and the relationship is ongoing. In fact, the Vale team is evaluating other sites in the Sudbury area for this type of remediation, ensuring a long-term, environmentally sustainable rehabilitation program.

Cost of Nuclear Waste Clean-up in the U.S. estimated at $377 Billion

A new report by the United States General Accounting Office (GAO) estimates the total cleanup cost for the radioactive contamination incurred by developing and producing nuclear weapons in the United States at a staggering $377 billion (USD), a number that jumped by more than $100 billion in just one year.

The United States Department of Energy (DoE) Office of Environmental Management (EM) is responsible for cleaning up radioactive and hazardous waste left over from nuclear weapons production and energy research at DoE facilities. The $377 billion estimate largely reflects estimates of future costs to clean up legacy radioactive tank waste and contaminated facilities and soil. 

The U.S. GAO found that EM’s liability will likely continue to grow, in part because the costs of some future work are not yet included in the estimated liability. For example, EM’s liability does not include more than $2.3 billion in costs associated with 45 contaminated facilities that will likely be transferred to EM from other DOE programs in the future.

In 1967 at the height of the U.S.–Soviet nuclear arms race, the U.S. nuclear stockpile totaled 31,255 weapons of all types. Today, that number stands at just 6,550. Although the U.S. has deactivated and destroyed 25,000 nuclear weapons, their legacy is still very much alive.

Nuclear weapons were developed and produced at more than one hundred sites during the Cold War. Cleanup began in 1989, and EM has completed cleanup at 91 of 107 nuclear sites, Still, according to the GAO, “but 16 remain, some of which are the most challenging to address.” 

EM relies primarily on individual sites to locally negotiate cleanup activities and establish priorities. GAO’s analysis of DOE documents identified instances of decisions involving billions of dollars where such an approach did not always balance overall risks and costs. For example, two EM sites had plans to treat similar radioactive tank waste differently, and the costs at one site—Hanford—may be tens of billions more than those at the other site. 

Each of the 16 cleanup sites sets its own priorities, which makes it hard to ensure that the greatest health and environmental risks are addressed first.
This is not consistent with recommendations by GAO and others over the last two decades that EM develop national priorities to balance risks and costs across and within its sites. 

By far the most expensive site to clean up is the Hanford site, which manufactured nuclear material for use in nuclear weapons during the Cold War. In 2017, the DoE estimated site cleanup costs at $141 billion.

Environmental liabilities are high risk because they have been growing for the past 20 years and will likely keep increasing.

EM has not developed a program-wide strategy that determines priority sites. Instead, it continues to prioritize and fund cleanup activities by individual site. Without a strategy that sets national priorities, EM lacks assurance that it is making the most cost-effective cleanup decisions across its sites.

The GAO is made three recommendations to DOE: (1) develop a program-wide strategy that outlines how it will balance risks and costs across sites; (2) submit its mandated annual cleanup report that meets all requirements; and (3) disclose the funding needed to meet all scheduled milestones called for in compliance agreements, either in required annual reports or other supplemental budget materials.

Handbook on Managing Emerging Contaminants

The term “emerging contaminants” and its multiple variants has come to refer to unregulated compounds discovered in the environment that are also found to represent a potential threat to human and ecological receptors. Such contaminants create unique and considerable challenges as the push to address them typically outpaces the understanding of their toxicity, their need for regulation, their occurrence, and techniques for treating the environmental media they affect.

Unregulated compounds that could be potential issues continually surface as detection technology improves, driving the need to more quickly evolve our understanding, technology, and appropriate response options to address them. It is clear that conquering this challenge will play a role in protecting our quality of life.

In Emerging Contaminants Handbook, published by CRC Press, editors Caitlin H. Bell, Margaret Gentile, Erica Kalve, Ian Ross, and John Horst review the latest insights on emerging contaminant occurrence, regulation, characterization, and treatment techniques. The goal is to serve as a primer for deepening your emerging contaminant acumen in navigating their management where they may be encountered.

Use Emerging Contaminants Handbook to:

  • Explore the definition, identification, and life cycle of emerging contaminants.
  • Review current information on sources, toxicology, regulation, and new tools for characterization and treatment of:
    • 1,4-Dioxane (mature in its emerging contaminant life cycle)
    • Per- and polyfluoroalkyl substances (PFASs; a newer group of emerging contaminants)
    • Hexavalent chromium (former emerging contaminant with evolving science)
    • 1,2,3-Trichloropropane (progressing in its emerging contaminant life cycle)
  • Examine opportunities in managing emerging contaminants to help balance uncertainty, compress life cycle, and optimize outcomes.

Emerging Contaminants Handbook can be purchased at CRCPress.com or Amazon.com.

Exxon Valdez Oil Spill – Lessons learned 30 years after the event

As reported in the Fairbanks Daily News-Miner, there are still lessons to be learned from the Exxon Valdez oil spill that occurred on March 24th, 1989.

A recent report issued by the United States Government Accountability Office (U.S. GAO) found that some organizations involved in environmental cleanup, restoration and research weren’t talking to each other during the Exxon Valdez Oil Spill or the Deepwater Horizon oil spill that occurred in 2010. In fact, some agencies weren’t even aware that the other existed.

The U.S. Congress, reacting to the Exxon Valdez spill, created the Interagency Coordinating Committee on Oil Pollution Research as part of the Oil Pollution Act of 1990. The committee’s purpose is to “coordinate oil pollution research among federal agencies and with relevant external entities,” according to the GAO. The committee, which has representatives from 15 agencies, is expected to coordinate with federal-state trustee councils created to manage restoration funds obtained through legal settlements.

GAO investigators found, however, that “the committee does not coordinate with the trustee councils and some were not aware that the interagency committee existed.”

Although three decades have passed since oil soiled the surface of Prince William Sound and rolled onto its shores, evidence of the spill remains. GAO staff visited the spill site in May of last year “and observed the excavation of three pits that revealed lingering oil roughly 6 inches below the surface of the beach …” Restoration is largely complete in Prince William Sound, but some work continues and research will continue for decades, the GAO report notes.

Background: Exxon Valdez Spill and Clean-up

As reported in History.com, The Exxon Valdez oil spill was a man-made disaster that occurred when Exxon Valdez, an oil tanker owned by the Exxon Shipping Company, spilled 41 million litres of crude oil into Alaska’s Prince William Sound on March 24, 1989. It was the worst oil spill in U.S. history until the Deepwater Horizon oil spill in 2010. The Exxon Valdez oil slick covered 2,000 kilometres of coastline and killed hundreds of thousands of seabirds, otters, seals and whales.

Exxon payed about $2 billion in cleanup costs and $1.8 billion for habitat restoration and personal damages related to the spill.

Cleanup workers skimmed oil from the water’s surface, sprayed oil dispersant chemicals in the water and on shore, washed oiled beaches with hot water and rescued and cleaned animals trapped in oil.

Environmental officials purposefully left some areas of shoreline untreated so they could study the effect of cleanup measures, some of which were unproven at the time. They later found that aggressive washing with high-pressure, hot water hoses was effective in removing oil, but did even more ecological damage by killing the remaining plants and animals in the process. Nearly 30 years later, pockets of crude oil remain in some locations.

Lessons Learned

A 2001 study found oil contamination remaining at more than half of the 91 beach sites tested in Prince William Sound.

The spill had killed an estimated 40 percent of all sea otters living in the Sound. The sea otter population didn’t recover to its pre-spill levels until 2014, twenty-five years after the spill.

Stocks of herring, once a lucrative source of income for Prince William Sound fisherman, have never fully rebounded.

In the wake of the Exxon Valdez oil spill, the U.S. Congress passed the Oil Pollution Act of 1990. The Oil Pollution Act of 1990 increased penalties for companies responsible for oil spills and required that all oil tankers in United States waters have a double hull. The Oil Pollution Act of 1990 (OPA), which was enacted after the Exxon Valdez spill in 1989, established the Interagency Coordinating Committee on Oil Pollution Research (interagency committee) to coordinate oil pollution research among federal agencies and with relevant external entities, among other things.

The U.S. GAO recommends, among other things, that the interagency committee coordinate with the trustee councils to support their work and research needs. 

Industrial Absorbents Market to Exceed $4.7 Billion by 2023

According to the new market research report, the industrial absorbents market is expected to grow from USD 3.7 billion in 2018 to USD 4.7 billion by 2023, at a Compound Annual Growth Rate (CAGR) of 5.1% during the forecast period.

The report, prepared by Research and Markets and entitled “Industrial Absorbents Market By Material Type (Natural Organic & Inorganic, Synthetic), Product (Pads, Rolls, Booms & Socks), Type (Universal, Oil-only, HAZMAT), End-use Industry (Oil & Gas, Chemical, Food Processing), and Region – Global Forecast to 2023“, states that the major factors driving the industrial absorbents market include growing environmental concerns and regulations regarding oil and chemical spills.

The synthetic segment is expected to be the fastest-growing material type segment in the industrial absorbents market. The industrial absorbents market by material type has been categorized into natural organic, natural inorganic, and synthetic. Synthetic industrial absorbents are capable of absorbing liquid up to 70 times of their weight, which makes them a highly adopted material for industrial applications. Synthetic absorbents have properties such as non-flammability and excellent water repellency, which makes them suitable for applications in oil-only and HAZMAT spill control products.

Booms and socks are ideal industrial absorbents products for spill control. Booms and socks are widely used for oil-based spill control in water environment. Booms have excellent water repelling properties and are best suited for water environments such as sea, lakes, and ponds, among others. Socks are flexible tubes which are used to control and contain spills on land environment and are ideal for quickly absorbing oil- or water-based liquid spills on land. In regions such as the Middle East & Africa and Europe, there are high occurrences of large spills in marine areas, which drives the growth of booms & socks segment in the industrial absorbents market.

Oil Absorbent Booms

Market Drivers

HAZMAT/chemical absorbent products are used to cleanup spills involving acids, bases, and other hazardous or unknown liquids as these spills can have harmful impacts on the environment and can be dangerous to the living beings present in the vicinity. HAZMAT/chemical absorbent products are designed to absorb the most aggressive acidic or caustic fluids and are majorly composed of synthetic absorbents. In addition, stringent regulations in regions such as North America and Europe on chemical discharge in to the environment have led to an increase in the demand for spill control products designed for chemicals. Therefore, this factor has fueled the adoption and application of HAZMAT/chemical absorbent products, which is driving the growth of the industrial absorbents market.

Chemicals are hazardous materials, and can cause severe harm to humans or environment if accidentally released or spilled in the environment. Chemical accidents usually occur during transportation of stored chemicals. Chemical manufacturers need to immediately respond to accidental spills that occur during manufacturing processes to minimize the impact of spills on the environment. Furthermore, regions such as North America and Europe have stringent norms with respect to chemicals and spill response. All these factors have fueled the growth of the industrial absorbents market in the chemical end-use industry.

Asian Pacific Market

Asia Pacific industrial absorbents market is expected to have the highest growth rate during the forecast period due to the rising awareness and pressure to reinforce strict environmental regulations for spill response & control and pollution caused by end-use industries. The industrial absorbents market in Asia Pacific is driven by the demand from countries such as China, Japan, India, and South Korea, owing to rapid industrialization and rising occurrences of small liquid spills across the end-use industries.

Key Market Players

The major manufacturers in the global industrial absorbents market are 3M Company (US), Brady Corporation (US), Decorus Europe Ltd. (UK), Johnson Matthey Plc (UK), Kimberly-Clark Professional (US), Meltblown Technologies Inc. (US), Monarch Green, Inc. (US), New Pig Corporation (US), and Oil-Dri Corporation of America (US).

Top Environmental Clean Up Projects throughout Canada

by David Nguyen, Staff Writer

1. The Randle Reef Contaminated Sediment Remediation Project – Hamilton, Ontario

Cost: $138.9 million

Contaminant: polycyclic aromatic hydrocarbons (PAHs), heavy metals

Approximately 60 hectares in size and containing 695 000 cubic metres of sediment contaminated with polycyclic aromatic hydrocarbons (PAHs) and heavy metals, the Randle Reef restoration project is three decades in the making. The pollution stems from various industries in the area including coal gasification, petroleum refining, steel making, municipal waste, sewage and overland drainage.1

Slated to be completed in three stages, the first stage involved the completion of a double steel sheet-piled walled engineered containment facility (ECF) around the most contaminated sediments, with stage 2 consists of dredging of the contaminated sediments into the ECF. Stage 3 will involve dewatering of the sediments in the ECF and treating the wastewater to discharge back into the lake, and the sediments will be capped with 60 cm of sand and silt enriched with organic carbon. This cap will both the isolate the contaminated sediments from the environment and form a foundation or future port structures. The ECF will be capped with layers of several material, including various sizes of aggregate, geo-textile and geo-grid, wickdrains, and asphalt and or concrete. This isolates the contaminants and provides a foundation for future port structures.

The project is expected to be completed by 2022 and cost $138.9 million. The Hamilton Port Authority will take over monitoring, maintenance, and development responsibilities of the facility for its expected 200-year life span. It is expected to provide $151 in economic benefits between job creation, business development, and tourism.

The Canada–United States Great Lakes Water Quality Agreement listed Hamilton harbour (which contains Randle Reef) as one of 43 Areas of Concern on the Great Lakes. Only 7 have been removed, 3 of which were in Canada.

2. Port Hope Area Initiative – Port Hope, Ontario

Cost: $1.28 billion

Contaminant: low-level radioactive waste (LLRW), industrial waste

The town of Port Hope, Ontario has about 1.2 million cubic metres of historic LLRW across various sites in the area. The soils and materials contain radium-226, uranium, arsenic, and other contaminants resulting from the refining process of radium and uranium between 1933 and 1988. Additional industrial waste containing metals, hydrocarbons, and dried sewage and sludge with copper and polychlorinated biphenyl (PCBs) will also be contained at the new facility.

The material was spread across town as the tailings were given away for free to be used as fill material for backyards and building foundations. An estimated 800 properties are affected, but the low-level radiation poses little risk to humans. The Port Hope Area Initiative will cost $1.28 billion and will include monitoring before, during, and after the construction of a long term management waste facility (LTMWF).

The LTWMF will be an aboveground engineered storage mound on the site of an existing LLRW management facility to safely store and isolate the contaminated soil and material, as well as other industrial waste from the surrounding area. The existing waste will also be excavated and relocated to the engineered mound. Leachate collection system, monitoring wells, and sensors in the cover and baseliner will be used to evaluate the effectiveness of the storage mound, allowing for long term monitoring of the waste.

The facility also contains a wastewater treatment plant that will treat surface water and groundwater during construction of the facility, as well as the leachate after the completion of the storage mound. The plant utilizes a two stage process of chemical precipitation and clarification (stage 1) and reverse osmosis (stage 2) to treat the water to meet the Canadian Nuclear Safety Commission requirements for water discharged to Lake Ontario.

3. Marwell Tar Pit – Whitehorse, Yukon Territory

Cost: $6.8 million

Contaminant: petroleum hydrocarbons (PHCs), heavy metals

This $6.8 million project funded by the governments of Canada and Yukon will remediate the Marwell Tar Pit in Whitehorse, which contain 27 000 cubic metres of soil and groundwater contaminated with hydrocarbons, such as benz[a]anthracene and heavy and light extractable petroleum hydrocarbons and naphthalene, and heavy metals such as manganese. Some of the tar has also migrated from the site.

Contamination began during the Second World War, when a crude oil refinery operated for less than one year before closing and being dismantled. The sludge from the bottom of dismantled storage tanks (the “tar”) was deposited in a tank berm, and over time other industries and businesses added other liquid waste to the tar pit. In the 1960s the pit was capped with gravel, and in 1998 declared a “Designated Contaminated Site.”

The project consists of three phases: preliminary activities, remedial activities, and post-remedial activities. The preliminary phase consisted of consolidating and reviewing existing information and completing addition site assessment.

The second phase of remedial activities began in July 2018 and involves implementing a remedial action plan. Contaminated soil segregated and heated through thermal conduction, which vaporizes the contaminants, then the vapours are destroyed by burning. Regular testing is done to ensure air quality standards are met. The main emissions from the site are carbon dioxide and water vapour. Remediated soil is used to backfill the areas of excavation. This phase is expected to be completed in 2019-2020.

The final phase will involve the monitoring of the site to demonstrate the remediation work has met government standards. This phase is planned to last four years. The project began in 2011 and is expected to be completed in 2020-2021.

4. Boat Harbour – Nova Scotia

Cost: approx.$133 million

Contaminant: PHCs, PAHs, heavy metals, dioxins and furans

The provinces largest contaminated site, Boar Harbour, is the wastewater lagoon for the local pulp mill in Abercrombie Point, as well as the discharge point for a former chemical supplier in the area. Prior to 1967, Boat Harbour was a saltwater tidal estuary covering 142 hectares, but a dam built in 1972 separated Boat Harbour from the ocean, and it is now a freshwater lake due to the receiving treated wastewater from the mill since the 1967.

The wastewater effluent contains contaminants including dioxins and furans, PAHs, PHCs, and heavy metals such as cadmium, mercury, and zinc. In 2015, the government of Nova Scotia passed The Boat Harbour Act, which ordered that Boat Harbour cease as the discharge point for the pulp mill’s treated wastewater in 2020, which allows time to build a new wastewater treatment facility and time to plan the remediation of Boat Harbour.

The estimated cost of the cleanup is $133 million, which does not include the cost of the new treatment facility. The goal is to return the harbour to its original state as a tidal estuary. The project is currently in the planning stages and updates can be found at https://novascotia.ca/boatharbour/.

5. Faro Mine – Faro, Yukon

Cost: projected$450 million

Contaminant: waste rock leachate and tailings

Faro Mine was once the largest open-pit lead-zinc mine in the world, and now contains about 70 million tonnes of tailings and 320 million tonnes of waste rock, which can potentially leach heavy metals and acids into the environment. The mine covers 25 square kilometres, and is located near the town of Faro in south-central Yukon, on the traditional territory of three Kasha First Nations – the Ross River Dena Council, Liard First Nation and Kaska Dena Council. Downstream of the mine are the Selkirk First Nation.

The Government of Canada funds the project, as well as leads the maintenance, site monitoring, consultation, and remediation planning process. The Government of Yukon, First Nations, the Town of Faro, and other stakeholders are also responsible for the project and are consulted regularly to provide input.

The entire project is expected to take about 40 years, with main construction activities to be completed by 2022, followed by about 25 years of remediation. The remediation project includes upgrading dams to ensure tailings stay in place, re-sloping waste rock piles, installing engineered soil covers over the tailings and waste rock, upgrading stream diversions, upgrading contaminant water collection and treatment systems.

6. Sylvia Grinnell River Dump – Iqaluit, Nunavut

Cost: $5.4 million

Contaminant: PHCs, polychlorinated biphenyls (PCBs), pesticides

Transport Canada awarded a contract of over $5.4 million in 2017 for a cleanup of a historic dump along the mouth of Sylvia Grinnell River in Iqaluit, Nunavut. The dump contains metal debris from old vehicles and appliances, fuel barrels, and other toxic waste from a U.S. air base, and is a site for modern day rogue dumping for items like car batteries. This has resulted in petroleum hydrocarbons, polychlorinated biphenyls (PCBs), pesticides, and other hazardous substances being identified in the area.

The Iqaluit airfield was founded in Frobisher Bay by the U.S. military during World War 2 as a rest point for planes flying to Europe. During the Cold War, the bay was used as part of the Distant Early Warning (DEW) Line stations across the north to detect bombers from the Soviet Union. When the DEW was replaces by the North Warning System in the 1980s, these stations were abandoned and the contaminants and toxic waste left behind. Twenty-one of these stations were remediated by the U.S. Department of National Defence at a cost of about $575 in 2014.

The Sylvia Grinnell River remediation project is part of the Federal government’s responsibility to remediate land around the airfield that was transferred to the Government of Nunavut in the 1990s.The contract was awarded in August 2017 and was completed in October. The remaining nontoxic is sealed in a new landfill and will be monitored until 2020.

7. Greenwich-Mohawk Brownfield – Brantford, Ontario

Cost: $40.78 million

Contaminant: PHC, PAC, heavy metals, vinyl chloride

The City of Brantford have completed a cleanup project of 148 000 cubic metres of contaminated soil at the Greenwich-Mohawk brownfield site. The area was historically the location of various farming manufacturing industries that shut down, leaving behind contaminants like PHC, PAC, heavy metals like lead, xylene, and vinyl chloride.

Cleanup began in 2015, and consisted coarse grain screening, skimming, air sparging, and recycling of 120 000 litres of oil from the groundwater, using biopiles to treat contaminated soil onsite with 73% of it being reused and the rest requiring off site disposal.

Barriers were also installed to prevent future contamination from an adjacent rail line property, as well as to contain heavy-end hydrocarbons discovered during the cleanup that could not be removed due to the release odorous vapours throughout the neighbourhood. The 20 hectare site took two years to clean and costed only $40.78 million of the allocated $42.8 million between the all levels of government, as well as the Federation of Canadian Municipalities Green Municipal Fund.

8. Rock Bay Remediation Project – Victoria, British Columbia

Cost: $60 million

Contaminant: PAHs, hydrocarbons, metals

Located near downtown Victoria and within the traditional territories of the Esquimalt Nation and Songhees Nation, the project entailed remediating 1.73 hectares of contaminated upland soils and 2.02 hectares of contaminated harbour sediments. The site was the location of a former coal gasification facility from the 1860s to the 1950s, producing waste products like coal tar (containing PAHs), metals, and other hydrocarbons, which have impacted both the sediments and groundwater at the site.

Remediation occurred in three stages. From 2004 to 2006, the first two stages involving the remediation of 50 300 tonnes of hazardous waste soils, 74 100 tonnes of non-hazardous waste soils, and 78 500 tonnes of contaminated soils above commercial land use levels. In 2009, 250 tonnes of hazardous waste were dredged from two sediment hotspots at the head of Rock Bay. About 7 million litres of hydrocarbon and metal impacted groundwater have been treated or disposed of, and an onsite wastewater treatment plant was used to return treated wastewater to the harbour.

Construction for the final stage occurred between 2014 to 2016 and involved:

  • installing shoring along the property boundaries to remove up to 8 metres deep of contaminated soils,
  • installing a temporary coffer dams
  • draining the bay to remove the sediments in dry conditions, and
  • temporary diverting two storm water outfalls around the work area.

Stage three removed 78 000 tonnes of contaminated and 15 000 tonnes of non-contaminated sediment that were disposed of/ destroyed at offsite facilities.

Final post-remediation monitoring was completed in January 2017, with post-construction monitoring for 5 years required as part of the habitat restoration plan to ensure the marine habitat is functioning properly and a portion of the site will be sold to the Esquimalt Nation and Songhees Nation.

9. Bushell Public Port Facility Remediation Project – Black Bay (Lake Athabasca), Saskatchewan

Cost: $2 million

Contaminant: Bunker C fuel oil

 Built in 1951 and operated until the mid-1980s, the Bushell Public Port Facility consist of two lots covering 3.1 hectares with both upland and water lots. The facility supplied goods and services to the local mines, and petroleum products to the local communities of Bushell and Uranium City. Historical activities like unloading, storing, and loading fuel oil, as well as a large spill in the 1980s resulted in the contaminated soil, blast rock, and bedrock in Black Bay that have also extended beyond the waterlot boundaries.

The remediation work occurred between 2005 to 2007, and involved excavation of soil and blast rock, as well as blasting and removing bedrock where oil had entered through cracks and fissures.

Initial remediation plans were to crush and treat the contaminated material by low temperature thermal desorption, which incinerates the materials to burn off the oil residue. However, opportunities for sustainable reuse of the contaminated material came in the use of the contaminated crush rock for resurfacing of the Uranium City Airport. This costed $1.75 million less than the incineration plan, and saved the airport project nearly 1 million litres of diesel fuel. The crush was also used by the Saskatchewan Research Council in the reclamation of the Cold War Legacy Uranium Mine and Mill Sites. A long term monitoring event is planned for 2018.

10. Thunder Bay North Harbour – Thunder Bay, Ontario

Cost: estimated at upwards to $50 million

Contaminant: Paper sludge containing mercury and other contaminants

 While all of the projects discussed so far have either been completed or are currently in progress, in Thunder Bay, the plans to clean up the 400 000 cubic metres of mercury contaminated pulp and fibre have been stalled since 2014 due to no organization or government designated to spearhead the cleanup.

While the water lot is owned by Transport Canada, administration of the site is the responsibility of the Thunder Bay Port Authority, and while Transport Canada has told CBC that leading the cleanup is up to the port, the port authority was informed by Transport Canada that the authority should only act in an advisory role. Environmental Canada has participated in efforts to advance the planning of the remediation work, but is also not taking the lead in the project either. Further complications are that the industries responsible for the pollution no longer exist.

Industrial activities over 90 years have resulted in the mercury contamination, which range in concentrations between 2 to 11 ppm on surface sediments to 21 ppm at depth. The thickness ranges from 40 to 380 centimetres and is about 22 hectares in size. Suggested solutions in 2014 include dredging the sediment and transferring it to the Mission Bay Confined Disposal Facility, capping it, or building a new containment structure. As of October 2018, a steering committee lead by Environment Canada, Transport Canada, Ontario’s environmental ministry and the Thunder Bay Port Authority, along with local government, Indigenous groups, and other stakeholders met to evaluate the remediation options, as well as work out who will lead the remediation.

TPH Risk Evaluation at Petroleum-Contaminated Sites

The United States Interstate Technology and Regulatory Council (ITRC) Total Petroleum Hydrocarbons (TPH) Risk Evaluation team has developed this guidance to assist state regulators and practitioners with evaluating risk and establishing cleanup requirements at petroleum release sites. This guidance focuses on factors that are unique to petroleum hydrocarbon releases and builds on other available documents published by the TPH Criteria Working Group (TPHCWG) (1997a1997b1997c1998a1998b1999), ITRC Risk-3 (2015), Massachusetts Department of Environmental Protection (MADEP) (2014), California State Water Board–San Francisco Bay Region (CASWB-SFBR) (2016a), and Texas Commission on Environmental Quality (TCEQ) (2017b).

Risk evaluations for petroleum release sites present complex and unique challenges to site managers, risk assessors, regulators, and other stakeholders. Mischaracterizing risks associated with petroleum contamination can lead to unnecessary cleanups, inappropriate property use limitations, or, most importantly, inadequate protection of human health and ecological receptors. Once released to the environment, petroleum contamination changes over time and space due to natural and anthropogenic weathering processes. Although traditional indicator compounds (e.g., benzene, toluene, ethylbenzene, xylene, and naphthalene [BTEXN]) may be present below levels of concern in impacted media, unidentified petroleum fractions or degradation products (metabolite compounds) could potentially still pose a risk to human health and ecological receptors. Summarizing approaches to evaluate this topic in more detail is one of the primary objectives of this document and it is hoped that this document will assist in further research regarding this subject.

A common assumption at petroleum release sites is that the carcinogenic indicator compounds (e.g., benzene, naphthalene, and, for some regulatory agencies, ethylbenzene and additives such as methyl tertiary-butyl ether [MTBE]) typically drive risk-based decision making rather than other petroleum compounds that may be present. However, very few field-based studies comparing risks posed by individual compounds found in TPH (such as benzene) to risks posed by the broader spectrum of TPH-related compounds have been published (Brewer et al. 2013). Additionally, concentrations of carcinogenic compounds might be reduced to low concentrations relative to other hydrocarbons due to natural attenuation processes. At such sites, the remaining petroleum hydrocarbons and petroleum-related degradation products (e.g., petroleum-related metabolites) can be expected to contribute to the potential human health noncarcinogenic risk at petroleum release sites.

This guidance will improve regulators’ and project managers’ understanding of the unique properties of TPH and provide the tools, techniques, and lessons learned to improve risk characterization and to make better-informed risk management decisions at petroleum-contaminated sites.

To access the guidance document, visit the ITRC website.