EPA declares trichloroethylene (TCE), a “very hazardous mutagenic cancer-causing chemical” after 22 years of study.

Today EPA took an important step towards protecting the public and wildlife from trichloroethylene (TCE), a very hazardous mutagenic cancer-causing chemical that pollutes the nation’s water and air. TCE is also the culprit involved in the Woburn, MA cancer cluster of childhood leukemia cases (and the subject of the movie, “A Civil Action” starring John Travolta). EPA’s press release is here.

This much-delayed action is a triumph of science over special interest politics. The public won today. Here I tell the history of science-manipulation for this chemical, but for the political shenanigans see today’s blog of my colleague Daniel Rosenberg.

TCE is a chlorinated solvent used primarily for metal degreasing—most notably for jet parts—and is a widespread drinking water contaminant that is leaching from military bases and industrial sites throughout the country. In addition to cancer, TCE causes harmful effects to the central nervous system, kidney, liver, immune system, male reproductive system, and the developing fetus. The EPA has been trying to finalize its assessment of TCE for 22 years, making today’s announcement a long-overdue victory for health.

The last EPA assessment of TCE was 24 years ago, in 1987, classifying TCE as a “probable” human carcinogen (Group 2B). In 1989, the EPA started to update its TCE cancer assessment, but didn’t issue a draft for public and peer review for a dozen years, until 2001. The 2001 EPA draft for TCE calculated that the chemical was 5 to 65 times more toxic than previously estimated, and classified it as “highly likely” to cause human cancer. It identified children as a susceptible population, and noted that co-exposure to some other chemicals may augment the toxicity of TCE.

The 2001 draft also triggered a decade-long firestorm of criticism from the chemical industry, the Department of Defense (DOD) and the Department of Energy (DOE), which together are responsible for about 750 TCE-contaminated dump sites in the nation.

Read the whole article from NRDC

Dianne Saxe of envirolaw says this opens Canada to potential litigation as well:

Yes, TCE is a carcinogen
by DIANNE SAXE on OCTOBER 3, 2011

After 22 years of study, and intense political maneuvering, the US Environmental Protection Agency has formally classified TCE (trichloroethene, also called trichloroethylene) as a carcinogen, as well as a non-cancer hazard to human health. The assessment is now a formal part of the the Integrated Risk Information System (IRIS) database, a human health assessment program that evaluates the latest science on chemicals in the environment, and which has drawn considerable fire from industry. The new assessment may make it harder to cleanup TCE contaminated sites to acceptable levels, and may require changes in Canadian air, soil and water standards.

TCE is one of the most common man-made chemicals found in the environment. It is a volatile chemical and a widely used chlorinated solvent, especially from the 1930s to the 1970s. Frequently found at contaminated sites, TCE migrates easily from contaminated ground water and soil into the indoor air of overlying buildings. Since 1987, it has been classed as a “probable human carcinogen”, but it now turns out to have been dangerous at levels previously believed to be safe. In 2001, EPA calculated that the chemical was 5 to 65 times more toxic than previously estimated, and classified it as “highly likely” to cause human cancer, especially in children.This assessment has undergone several levels of peer review including, agency review, interagency review, public comment, external peer review by EPA’s Science Advisory Board in January 2011, and a scientific consultation review in 2006 by the National Academy of Sciences.

The new assessment may require regulators across Canada and the US to reassess generic criteria (for air, water and soil), risk assessments for sites contaminated with TCE, and limits on current industrial emissions. For example, until recently, Ontario allowed 50 ug/L of TCE in drinking water. According to the new assessment, that level was likely to cause cancer in about 1 in 10,000 people, possibly more in small children. Co-exposure to other chemicals can make TCE more dangerous to health.

The EPA plans to use the new TCE toxicity values in:

· Establishing cleanup methods at the 761 Superfund sites where TCE has been identified as a contaminant
· Understanding the risk from vapor intrusion as TCE vapors move from contaminated groundwater and soil into the indoor air of overlying buildings
· Revising EPA’s Maximum Contaminant Level for TCE as part of the carcinogenic volatile organic compounds group in drinking water
· Developing appropriate regulatory standards limiting the atmospheric emissions of TCE.

All of these changes will likely affect Canadian standards as well, since we typically follow the US lead.

CD Howe: Threats to Groundwater Supplies in Canada Require Coordinated Response

Threats to Groundwater Supplies in Canada Require Coordinated Response: C.D. Howe Institute

TORONTO, Feb. 10 /CNW/

– Better oversight of Canada’s groundwater resources is required in the face of numerous challenges, according to a study released today by the C.D. Howe Institute.

In ” Protecting Groundwater: The Invisible and Vital Resource, ” James Bruce, recently chair of the Council of Canadian Academies Expert Panel on Groundwater, assesses present and emerging threats and makes recommendations for better groundwater management in Canada.
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Challenges for groundwater management, the author says, include energy issues, such as the uncertain impact of shale gas “fracking,” slow recharge rates of aquifers, agricultural intensification, and contamination. Canada has yet to experience large-scale over-exploitation of groundwater resources and its groundwater remains of good quality.

Bruce says the time is right, however, for establishing the legal, regulatory and management systems, along with the necessary monitoring provisions, to overcome the threats to groundwater.

Nearly 10 million Canadians, including about 80 percent of the rural population and many small- to medium-sized municipalities, rely on groundwater for their everyday needs. However, Canadians living in large cities and most policymakers tend to ignore groundwater and its management. This asymmetry of interests has resulted in fragmented knowledge of groundwater locations, their quantity, quality, and how groundwater supplies are changing over time in Canada.

Bruce says an effective groundwater management strategy would adhere to five major principles for sustainability. They are: protection from depletion; protection from contamination; ecosystem viability; allocation to maximize groundwater’s contribution to social and economic well-being; and the application of good governance.

Given the challenges that lie ahead, the author concludes, meaningful cooperation by three levels of government, as well as prices that better match the costs of delivering water and wastewater services, and an expansion in data collection efforts are required to sustainably manage Canada’s groundwater.

For the study go to: http://www.cdhowe.org/pdf/Backgrounder_136.pdf

For further information:
James P. Bruce, Former Chair, Council of
Canadian Academies Expert Panel on
Groundwater;
Colin Busby, Senior Policy Analyst,

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Can Water Treatment: Draft NWT Water Stewardship Strategy released

Draft NWT Water Stewardship Strategy Released

Posted on 06 November 2009 The Department of Environment and Natural Resources and Indian and Northern Affairs Canada have released the draft Northwest Territories Water Stewardship Strategy. The draft strategy promotes an ecosystem-based approach to integrated watershed management in order to improve water stewardship in the NWT, and reflects the deep and fundamental relationship between residents and the waters of the NWT.

The strategy recognizes the importance of combining the best available local, traditional and scientific knowledge. “As stewards of water we have an obligation and a responsibility to adopt more sustainable water management practices”, said Minister of Environment and Natural Resources Michael Miltenberger. “Together with our water partners, we have created a draft strategy that will result in more effective water stewardship to ensure NWT waters will remain clean, abundant and productive for all time.”

The NWT Water Stewardship Strategy is a collaborative, multi-stakeholder approach to the responsible management of water resources flowing both within the NWT and from other jurisdictions. The draft Strategy is intended to improve decision-making processes, information sharing, and communication among all parties involved in water stewardship activities in the NWT. “Stewardship is a shared responsibility. To effectively look after our water resources we must work together at all levels,” said Chuck Strahl, Minister of Indian Affairs and Northern Development.

As representatives on the steering committee guiding this initiative, Aboriginal governments have played a key role in the development process to date. Additionally, other governments, regional organizations, communities, environmental non-governmental organizations, co-management boards and agencies, industry and residents have contributed their voice to the development of the draft strategy, which respects Aboriginal and treaty rights as well as rights and processes set out in settled land claim and self-government agreements. Public engagement opportunities will take place between November 2009 and March 2010. Input collected during this period will inform the final version of the document, which has a target completion date of summer 2010.