Question: Who evaluated for public health effects in an agreement with an agency that focuses on minimizing human health risks associated with exposure to hazardous substances,  where workers were potentially exposed to the industrial solvent trichloroethylene?

Context paragraphs:
COSHH: The Control of Substances Hazardous to Health Regulations 2002, as amended is a United Kingdom Statutory Instrument that states general requirements on employers to protect employees and other persons from the hazards of substances used at work by risk assessment, control of exposure, health surveillance and incident planning.  There are also duties on employees' to take care of their own exposure to hazardous substances and prohibitions on the import of certain substances into the European Economic Area.  The regulations reenacted with amendments the Control of Substances Hazardous to Work Regulations 1999 and implement several European Union directives.

ChemSec: The International Chemical Secretariat (ChemSec) is a non-governmental organisation founded in Sweden in 2002 to advocate in favour of stricter regulatory controls on potentially hazardous chemicals and to work with businesses on reducing the production and use of hazardous substances in their products and supply chains.  ChemSec maintains the SIN List, identifying hazardous substances likely to be restricted under EU REACH regulation.

Superfund: Superfund is a United States federal government program designed to fund the cleanup of sites contaminated with hazardous substances and pollutants.  It was established as the Comprehensive Environmental Response, Compensation, and Liability Act of 1980 (CERCLA).  It authorizes federal natural resource agencies, primarily the Environmental Protection Agency (EPA), states and Native American tribes to recover natural resource damages caused by hazardous substances, though most states have and most often use their own versions of CERCLA.  CERCLA created the Agency for Toxic Substances and Disease Registry (ATSDR).  The EPA may identify parties responsible for hazardous substances releases to the environment (polluters) and either compel them to clean up the sites, or it may undertake the cleanup on its own using the Superfund (a trust fund) and costs recovered from polluters by referring to the U.S. Department of Justice.

Public Health Agency of Sweden: The Public Health Agency of Sweden (Swedish: "Folkhälsomyndigheten" ) is a Swedish government agency with national responsibility for public health.  It falls under the Ministry of Health and Social Affairs and works to promote public health and to prevent illness and injuries through education.  It monitors the health of the population, infectious disease control measures, and public health interventions, and assists the Government in its decision-making process by providing facts and knowledge.  The agency is tasked with minimizing negative environmental impact on human health, and participates in the work of the EU and international public health organisations, such as the WHO and IANPHI.

Center for Radiological Research: The Columbia University Center for Radiological Research (CRR) was founded more than 75 years ago to better understand the human health risks associated with exposure to ionizing radiation exposure.  It is the oldest and largest such research center in the world.  The Center's efforts are focused on unraveling the biological and molecular mechanisms underlying radiation effects in cells, tissues, organ systems and living organisms and how radiation exposure affects human health.  Its primary mission is to provide an unbiased, comprehensive and independent source of scientific information about radiation risks to governmental agencies, elected officials, non-profit institutions and private entities to enable them to make sound, evidence based policy decisions.  The CRR also provides basic science training to the next generation of radiobiologists, medical and health physicists and clinical radiologists.  The Center's multidisciplinary staff encompasses professionals from diverse fields including molecular biology, cell biology, radiation physics, computational physics, engineering, radiation oncology and public health.

Chemical hazard: A chemical hazard is a type of occupational hazard caused by exposure to chemicals in the workplace.  Exposure to chemicals in the workplace can cause acute or long-term detrimental health effects.  There are many types of hazardous chemicals, including neurotoxins, immune agents, dermatologic agents, carcinogens, reproductive toxins, systemic toxins, asthmagens, pneumoconiotic agents, and sensitizers.  These hazards can cause physical and/or health risks.  Depending on chemical, the hazards involved may be varied, thus it is important to know and apply the PPE especially during the lab.

Environmental health: Environmental health is the branch of public health that is concerned with all aspects of the natural and built environment that may affect human health.  Health is the science, practice, and study of a human's well-being and their health and preventing illnesses and human injuries.  Other terms referring to or concerning environmental health are environmental public health, and public health protection / environmental health protection.  Environmental health and environmental protection are very much related.  Environmental health is focused on the natural and built environments for the benefit of human health, whereas environmental protection is concerned with protecting the natural environment for the benefit of human health and the ecosystem.  Research in the environmental health field tries to limit the harmful exposures through natural things such as soil, water, air food, etc.

Canadian Environmental Protection Act, 1999: The Canadian Environmental Protection Act, 1999 is an Act of the Parliament of Canada, whose goal is to contribute to sustainable development through pollution prevention and to protect the environment, human life and health from the risks associated with toxic substances.  It covers a diversity of activities that can affect human health and the environment, and acts to address any pollution issues not covered by other federal laws.  As such, CEPA 1999 is a "catch all" piece of legislation that ensures potentially toxic substances are not inadvertently exempt from federal oversight as a result of unforeseen legislative loopholes.

Agency for Toxic Substances and Disease Registry: The Agency for Toxic Substances and Disease Registry (ATSDR) is a federal public health agency within the United States Department of Health and Human Services.  The agency focuses on minimizing human health risks associated with exposure to hazardous substances.  It works closely with other federal, state, and local agencies; tribal governments; local communities; and healthcare providers.  Its mission is to "Serve the public through responsive public health actions to promote healthy and safe environments and prevent harmful exposures."  ATSDR was created as an advisory, nonregulatory agency by the Superfund legislation and was formally organized in 1985.

View-Master factory supply well: The View-Master factory supply well in Beaverton, Oregon, was evaluated for public health effects by the Oregon Department of Human Services (ODHS) under a cooperative agreement with the Agency for Toxic Substances and Disease Registry (ATSDR).  Workers there were potentially exposed to the industrial solvent trichloroethylene (TCE), classified by the International Agency for Research on Cancer (IARC) as a probable human carcinogen.  At the factory, which closed in 2001, it had been estimated by ODHS that up to 25,000 workers may have been exposed to TCE via the factory's drinking water, which was drawn from a well on-site.  However, further investigation showed that the actual number of employees who can be identified from employment records for the site is approximately half that number.  In addition, the number of employees identified as having worked at the site for more than five years is likely to be less than 1,000.  The site is now considered safe.

Supporting paragraphs: View-Master factory supply well Agency for Toxic Substances and Disease Registry
Answer: Oregon Department of Human Services