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Books > Business & Economics > Industry & industrial studies > Industrial relations & safety > Occupational / industrial health & safety

Railway Safety (Railtex) (Hardcover): Pep Railway Safety (Railtex) (Hardcover)
Pep
R5,229 Discovery Miles 52 290 Ships in 12 - 19 working days

In today's maturing railway industry, the key to getting - and staying - ahead is to keep up with the latest developments across all sectors involved in railway technology. There is pressure upon the rail industry to deliver more customer benefits, with greater cost-effectiveness, faster. Over the past few years, events have highlighted the need for tighter restrictions and more stringent safety legislation to reduce the risks of track and signal failure, maintenance issues, human error etc. "Railway Safety" examines the necessity of new systems, such as APT (automatic train protection) and TPWS (traing protection warning systems) striking a balance between cost-effectiveness and the need to regain public confidence in the railways. "Railway Safety" brings together contributions from all areas of the rail industry and academia and offers the opportunity to see the most up-to-date information, case studies and technological advances from experts in this field. This collection of papers covers such topics as: safety management; risk, error and testing; signalling safety and maintenance; on-train safety systems; fire and ventilation; and leaves on the line. "Railway Safety" should be of interest to all those engineering managers, contractors, engineers and consultants involved in any aspect of railway technology.

Design Risk Management - Contribution to Health and Safety (Paperback): SD Summerhayes Design Risk Management - Contribution to Health and Safety (Paperback)
SD Summerhayes
R1,798 Discovery Miles 17 980 Ships in 12 - 19 working days

The Construction (Design and Management) Regulations 2007 (CDM Regulations 2007) is a revision of a major piece of legislation within the wide portfolio of construction-related legislation. It seeks to improve the long term health and safety performance of the UK construction industry, with ownership of health and safety proactively undertaken by the integrated project team.

Good design has always embraced health and safety issues and design teams remain essential players as well as key contributors and communicators in matters of health and safety management. Designers have a legal responsibility to ensure that their designs account for health and safety at all stages within the holistic envelope of construction.

"Design Risk Management: Contribution to Health and Safety" gives detailed guidance to construction practitioners with design responsibility on how to identify and manage health and safety risks, and on the design strategies to be followed. It seeks to focus on accountability with due emphasis on the minimisation of unnecessary bureaucracy and offers documentation trails that provide an insight to managing risk and not paperwork. Subsequently it offers a process by which designers can discharge their duties in compliance with the CDM Regulations.

Guidelines for Hazard Evaluation Procedures 3e (Hardcover, 3rd Edition): Ccps Guidelines for Hazard Evaluation Procedures 3e (Hardcover, 3rd Edition)
Ccps
R4,068 Discovery Miles 40 680 Ships in 12 - 19 working days

"Guidelines for Hazard Evaluation Procedures, 3rd Edition" keeps process engineers updated on the effective methodologies that process safety demands. Almost 200 pages of worked examples are included to facilitate understanding. References for further reading, along with charts and diagrams that reflect the latest views and information, make this a completely accessible work. The revised and updated edition includes information not included in previous editions giving a comprehensive overview of this topic area.

Health and Safety: Questions and Answers, 2nd edition (Paperback, 2nd edition): Pat Perry Health and Safety: Questions and Answers, 2nd edition (Paperback, 2nd edition)
Pat Perry
R1,365 Discovery Miles 13 650 Ships in 12 - 19 working days

The amount of knowledge required on the subject of health and safety is constantly growing as new and revised laws are implemented, best practice improves, guidance changes. The subject range of this book is therefore broad and each chapter deals with a specific health and safety topic, with a practical, no-nonsense approach.

Keto Meal Plan - The Essential Keto Diet Plan - 10 Days To Permanent Fat Loss (Paperback): Carl Jepson Keto Meal Plan - The Essential Keto Diet Plan - 10 Days To Permanent Fat Loss (Paperback)
Carl Jepson
R461 R428 Discovery Miles 4 280 Save R33 (7%) Ships in 10 - 15 working days
Modern Safety and Resource Control Management (Hardcover): T.D. Schneid Modern Safety and Resource Control Management (Hardcover)
T.D. Schneid
R4,340 Discovery Miles 43 400 Ships in 12 - 19 working days

A highly effective approach to safety and health management in the industrial setting.

Over the past two decades, the role of workplace safety and health professionals has expanded dramatically to encompass not only OSHA compliance, but a host of other regulatory and risk management areas such as fire protection, workers' compensation, insurance, quality control, and more. Defining this new role as the management of safety and resource control, this timely and comprehensive work introduces a unique method for effectively managing both loss prevention and the safety function in the industrial setting. The author incorporates MBO and TQM management techniques as well as contemporary ideas and technologies, providing clear guidelines and discussions on how to implement the new approach to the loss prevention and safety function, including:

  • How to use a circular management pattern to design, implement, and manage regulatory compliance programs
  • How to deal with emerging risk issues such as ergonomics, tuberculosis, or workplace violence
  • How to establish a new goal methodology based on performance rather than injuries/illnesses
  • How new technologies affect the loss prevention and safety function
  • How to assess one's current program, perform cost/benefit analysis, and build an individual action plan
  • How to minimize risks of corporate and individual liabilities
  • Where to find information on different federal and state laws and regulations
Radiation Safety - Protection and Management for Homeland Security and Emergency Response (Hardcover): LA Burchfield Radiation Safety - Protection and Management for Homeland Security and Emergency Response (Hardcover)
LA Burchfield
R2,636 Discovery Miles 26 360 Ships in 12 - 19 working days

Pertaining to homeland security, this title is a comprehensive guide to radiation protection caused by accidents or terrorism Provides essential strategies and guidance for protecting ports and examines the latest nuclear detection devices that can be deployed Explains the procedures in FEMA's "National Incident Management System" Gives specific details for first responders and emergency workers on how to prepare for and handle radiological incidents

Black Lung - Anatomy of a Public Health Disaster (Paperback, illustrated edition): Alan Derickson Black Lung - Anatomy of a Public Health Disaster (Paperback, illustrated edition)
Alan Derickson
R756 R667 Discovery Miles 6 670 Save R89 (12%) Ships in 10 - 15 working days

In the definitive history of a twentieth-century public health disaster, Alan Derickson recounts how, for decades after methods of prevention were known, hundreds of thousands of American miners suffered and died from black lung, a respiratory illness caused by the inhalation of coal mine dust. The combined failure of government, medicine, and industry to halt the spread of this disease and even to acknowledge its existence resulted in a national tragedy, the effects of which are still being felt.

The book begins in the late nineteenth century, when the disorders brought on by exposure to coal mine dust were first identified as components of a debilitating and distinctive illness. For several decades thereafter, coal miners' dust disease was accepted, in both lay and professional circles, as a major industrial disease. Derickson describes how after the turn of the century medical professionals and industry representatives worked to discredit and supplant knowledge about black lung, with such success that this disease ceased to be recognized. Many authorities maintained that breathing coal mine dust was actually beneficial to health.

Derickson shows that activists ultimately forced society to overcome its complacency about this deadly and preventable disease. He chronicles the growth of an unprecedented movement from the turn-of-the-century miners' union, to the social medicine activists in the mid-twentieth century, and the black lung insurgents of the late sixties which eventually won landmark protections and compensation with the enactment of the Federal Coal Mine Health and Safety Act in 1969. An extraordinary work of scholarship, Black Lung exposes the enormous human cost of producing the energy source responsible for making the United States the world's preeminent industrial nation."

Safety and Health in the Nineties (Hardcover): Terrell Safety and Health in the Nineties (Hardcover)
Terrell
R4,339 Discovery Miles 43 390 Ships in 12 - 19 working days

Prepare for stricter OSHA standards and prevent costly workplace injury and illness Safety and Health Management in the Nineties Milton J. Terrell, CSP Effective management of employee safety and health is crucial to reducing the number, severity, and cost of workplace injuries and illnesses. Yet less than half of today's 420,000 midsize industrial companies have any safety and health program in place for their personnel. What's more, many companies that attempt to establish safety programs don't come close to meeting proposed government standards, which will soon become the law. A widely respected safety and health consultant, Milton Terrell provides you with the step-by-step guidance you need to develop a complete and effective safety and health program--one that will enable you to comply with imminent federal legislation. Terrell's Safety and Health Management in the Nineties accomplishes this by drawing from the comprehensive guidelines set by the Occupational Safety and Health Administration's Voluntary Protection Program. It's the only book on the market today that uses this model and translates its formal provisions into clear, concise information you can readily use. With the help of the book's practical worksheets and other visual aids, you'll soon be able to:
* communicate your safety and health policy and set program objectives.
* engage workers, managers, and executives in the safety and health process.
* create distinct lines of responsibility for safety among company personnel.
* compile an inventory of potential workplace hazards and identify gaps in the safety and health program.
* devise a hierarchy of management systems to prevent and control hazards.
* develop an occupational health delivery system tailored to meet the specific needs of your company.
* establish ongoing safety and health training to help workers understand hazards and protect against them.

Economic Evaluation of Interventions for Occupational Health and Safety - Developing Good Practice (Paperback, New): Emile... Economic Evaluation of Interventions for Occupational Health and Safety - Developing Good Practice (Paperback, New)
Emile Tompa, Anthony J Culyer, Roman Dolinschi
R2,555 Discovery Miles 25 550 Ships in 12 - 19 working days

Undertaking economic evaluations of occupational health and safety interventions can be difficult for a number of reasons. This is reflected by the significant lack of evidence on their cost-effectiveness. Particular challenges include: complex labour legislation, differences in the perception of health risks associated with work experiences amongst workplace parties and policy makers, costs and consequences being borne by different stakeholders in the system, conflicting incentives and priorities between the multiple stakeholders, lack of consensus about what ought to count as a benefit or cost of intervening or not intervening, multiple providers of indemnity and medical care coverage, and industry-specific human resources practices that make it difficult to identify all work-related illnesses and injuries. Advancement of the application of economic evaluation methods in this literature is further hindered by the fact that most methods books are designed for use in a clinical setting and cannot be easily applied to the workplaces. In the face of such barriers, it is not surprising that few studies of occupational health and safety interventions contain an economic evaluation. This book aims to lay the foundations for a systematic methodology of economic evaluation of workplace interventions, by identifying the main barriers to research of high quality and practical relevance, and proposing a research strategy to overcome them. Context chapters provide a wealth of background material ranging from a presentation of the broad conceptualization of work and health, to suggestions for strategies in confronting the dearth of data often experienced by occupational health and safety researchers. The institutional and regulatory approaches in different international jurisdictions are covered in one of the context chapters. Specific topic chapters delve into the principles and application of economic evaluation methods relevant to workplaces and system level interventions. Study design, type of analysis, costs, consequences, uncertainty, and equity are all covered, providing guidance on meeting many analytical and decision-making challenges. The final chapter synthesizes the summaries, conclusions, challenges and recommendations from across the book, presenting the synthesis as a reference case.

OSHA and EPA Process Safety Management Requirement (Hardcover): M. Dennison OSHA and EPA Process Safety Management Requirement (Hardcover)
M. Dennison
R5,714 Discovery Miles 57 140 Ships in 12 - 19 working days

This practical, time-saving guide provides you with invaluable explanations of the requirements of OSHA's new Process Safety Management Standard and the EPA's new regulations on risk management programs for chemical accidental release prevention. OSHA and EPA Process Safety Management Requirements offers practical and timely guidance on everything from the proper safety procedures and equipment to effective training programs and compliance audits.

Guidelines for Laboratory Design - Health, Safety,  and Environmental Considerations, Fourth Edition (Hardcover, 4th Edition):... Guidelines for Laboratory Design - Health, Safety, and Environmental Considerations, Fourth Edition (Hardcover, 4th Edition)
LJ DiBerardinis
R3,903 Discovery Miles 39 030 Ships in 12 - 19 working days

Proven and tested guidelines for designing ideal labs for scientific investigations

Now in its "Fourth Edition, Guidelines for Laboratory Design "continues to enable readers to design labs that make it possible to conduct scientific investigations in a safe and healthy environment. The book brings together all the professionals who are critical to a successful lab design, discussing the roles of architects, engineers, health and safety professionals, and laboratory researchers. It provides the design team with the information needed to ask the right questions and then determine the best design, while complying with current regulations and best practices.

"Guidelines for Laboratory Design" features concise, straightforward advice organized in an easy-to-use format that facilitates the design of safe, efficient laboratories. Divided into five sections, the book records some of the most important discoveries and achievements in: Part IA, Common Elements of Laboratory Design, sets forth technical specifications that apply to most laboratory buildings and modulesPart IB, Common Elements of Renovations, offers general design principles for the renovation and modernization of existing labsPart II, Design Guidelines for a Number of Commonly Used Laboratories, explains specifications, best practices, and guidelines for nineteen types of laboratories, with three new chapters covering nanotechnology, engineering, and autopsy labsPart III, Laboratory Support Services, addresses design issues for imaging facilities, support shops, hazardous waste facilities, and laboratory storeroomsPart IV, HVAC Systems, explains how to heat, cool, and ventilate labs with an eye towards energy conservationPart V, Administrative Procedures, deals with bidding procedures, final acceptance inspections, and sustainability

The final part of the book features five appendices filled with commonly needed data and reference materials.

This "Fourth Edition" is indispensable for all laboratory design teams, whether constructing a new laboratory or renovating an old facility to meet new objectives.

Dirty Electricity - Electrification and the Diseases of Civilization (Paperback): Samuel Milham Mph Dirty Electricity - Electrification and the Diseases of Civilization (Paperback)
Samuel Milham Mph
R319 R298 Discovery Miles 2 980 Save R21 (7%) Ships in 10 - 15 working days

When Thomas Edison began wiring New York City with a direct current electricity distribution system in the 1880s, he gave humankind the magic of electric light, heat, and power; in the process, though, he inadvertently opened a Pandora's Box of unimaginable illness and death.

Dirty Electricity tells the story of Dr. Samuel Milham, the scientist who first alerted the world about the frightening link between occupational exposure to electromagnetic fields and human disease. Milham takes readers through his early years and education, following the twisting path that led to his discovery that most of the twentieth century diseases of civilization, including cancer, cardiovascular disease, diabetes, and suicide, are caused by electromagnetic field exposure.

In the second edition, he explains how electrical exposure does its damage, and how electricity is causing our current epidemics of asthma, diabetes and obesity.

Dr. Milham warns that because of the recent proliferation of radio frequency radiation from cell phones and towers, terrestrial antennas, Wi-Fi and Wi-max systems, broadband internet over power lines, and personal electronic equipment, we may be facing a looming epidemic of morbidity and mortality. In Dirty Electricity, he reveals the steps we must take, personally and as a society, to coexist with this marvelous but dangerous technology.

Cape Safety, Inc. - Change of Climate (Paperback): Richard Hughes Cape Safety, Inc. - Change of Climate (Paperback)
Richard Hughes
R554 Discovery Miles 5 540 Ships in 10 - 15 working days
Controlling Risk - Thirty Techniques for Operating Excellence (Paperback): Jim Wetherbee Controlling Risk - Thirty Techniques for Operating Excellence (Paperback)
Jim Wetherbee
R646 R589 Discovery Miles 5 890 Save R57 (9%) Ships in 10 - 15 working days

Jim Wetherbee, the only five-time Space Shuttle commander, presents thirty techniques that astronauts use-not only to stay alive in the unforgiving and deadly environment of space, but also to conduct high-quality operations and accomplish complex missions. These same techniques, based on the foundational principles of operating excellence, can help anyone be successful in high-hazard endeavors, ordinary business, and everyday life. Controlling Risk shows you how to embrace these techniques as a way of operating and living your life, so you can predict and prevent your next accident, while improving performance and productivity to take your company higher

Hazardous Waste Management (Hardcover): G.W. Dawson Hazardous Waste Management (Hardcover)
G.W. Dawson
R9,159 Discovery Miles 91 590 Ships in 12 - 19 working days

Drawn from over 14 years of engineering and scientific experience, this is a comprehensive review of important approaches to hazardous waste management. The book deals with all major technical areas in this field and takes a historical view of the evaluation of US regulations and policy. Also included is valuable information on ways hazardous waste problems are addressed in foreign countries.

Compliance: Regulation and Environment (Hardcover): Bridget M. Hutter Compliance: Regulation and Environment (Hardcover)
Bridget M. Hutter
R4,580 Discovery Miles 45 800 Ships in 12 - 19 working days

The concept of compliance is central to government attempts to regulate economic activities. In this volume Hutter investigates the notion of compliance in two areas of vital importance to our everyday lives, namely occupational health and safety, and the environment. Hutter provides a snapshot view of the work of field-level inspectors and in doing so is able to provide insights into the broader factors which influence regulation and its definition at the everyday level, adding to our understanding of an ill-defined area of criminal law and social control.

Principles for Evaluating Health Risks in Children Associated with Exposure to Chemicals (Paperback): Ipcs Principles for Evaluating Health Risks in Children Associated with Exposure to Chemicals (Paperback)
Ipcs
R1,255 Discovery Miles 12 550 Ships in 10 - 15 working days

Scientific knowledge in recent years has demonstrated that children are a vulnerable population subgroup with special susceptibilities and unique exposures to environmental factors that have important implications for public health practices and risk assessment approaches. The heightened susceptibility of children derives primarily from the unique biological and physiological features that characterize the various stages of development from conception through adolescence as well as from certain behavioral characteristics and external factors that may result in increased exposure levels. This new volume in the Environmental Health Criteria (EHC) Series provides a systematic analysis of the scientific principles to be considered in assessing health risks in children; taking into account their unique susceptibilities. The terms children and child as used in this report include the stages of development from conception through adolescence. This new EHC builds on previous volumes addressing methodologies for assessing risks in children: EHC 30 Principles for Evaluating Health Risks to Progeny Associated with Exposure to Chemicals During Pregnancy (WHO 1984) and EHC 59 Principles for Evaluating Health Risks from Chemicals During Infancy and Early Childhood: The Need for a Special Approach (WHO 1986). The central focus of this volume is on the child (developing embryo fetus infant etc.) rather than on a specific environmental agent target organ or disease. Thus it addresses the difficult task of integrating all what is known about both exposure information toxicity data and health outcome at different life stages, which is especially challenging when data are limited for particular life stages (e.g. during pregnancy). The book will be useful to public health officials research and regulatory scientists and risk assessors."

Secrets Of Safety And Industrial Hygiene - A Must-Read For Those Interested In Safety Industry: Importance Of Food Safety And... Secrets Of Safety And Industrial Hygiene - A Must-Read For Those Interested In Safety Industry: Importance Of Food Safety And Sanitation (Paperback)
Carie Kubecka
R241 Discovery Miles 2 410 Ships in 10 - 15 working days
Occupational Health in Developing Countries (Paperback): J. Jeyaratnam Occupational Health in Developing Countries (Paperback)
J. Jeyaratnam; Foreword by Sven Hernberg
R577 Discovery Miles 5 770 Ships in 12 - 19 working days

This comprehensive textbook specifically addresses the issue of occupational health in countries with minimal resources. Extensive industrial and agricultural growth is taking place in these countries, resulting in an urgent need for the provision of readily available and accessible health care to the working population. Their special concerns and priorities need to be indentified: for example acute pesticide poisoning is a major concern, whereas in richer nations, concern is about chronic effects of pesticides.

Searching for Causes of Work-Related Diseases - An Introduction to Epidemiology at the Work Site (Paperback): Jorn Olsen,... Searching for Causes of Work-Related Diseases - An Introduction to Epidemiology at the Work Site (Paperback)
Jorn Olsen, Franco Merletti, David Snashall, Karel Vuylsteek
R1,625 Discovery Miles 16 250 Ships in 12 - 19 working days

This book is an introductory text for those people who need to know more about the scientific principles behind the study of the causes of disease occurence. As most people spend a large part of their lives at work, and as some people may be at risk of being exposed to harmful substances at high levels, workers protection should have a high priority. Studies in the workplace can help to identify causes of occupational diseases, and the outcome of such investigations should be applied when the effects of protective action are evaluated. In searching for occupational causes of diseases, epidemiological principles should be used, even at the factory level. Applying strict logical principles to the collection of data concerning worker's experience with ill-health ensures that a useful insight is gained into the causes of disease, and that data are obtained in a format suitable for subsequent larger-scale studies.

Establishing a System for Control of Nuclear Material for Nuclear Security Purposes at a Facility during Use, Storage and... Establishing a System for Control of Nuclear Material for Nuclear Security Purposes at a Facility during Use, Storage and Movement (Paperback)
Iaea
R1,062 Discovery Miles 10 620 Ships in 12 - 19 working days

Control of nuclear material comprises the administrative and technical measures applied to ensure that nuclear material is not misused or removed from its assigned location without approval and/or without proper accounting. This publication, which builds upon the Implementing Guide IAEA Nuclear Security Series No.25-G , focuses on the control of nuclear material during storage, use and movement using a facility's nuclear material accounting and control (NMAC) system. It describes practical measures for controlling nuclear material for nuclear security purposes during all activities at a facility, including movements, and how to use a graded approach in applying such measures. The technical guidance provided is targeted at States and their competent authorities on how to use individual elements of the NMAC system, but will be also useful for persons responsible for designing, operating and assessing nuclear security systems, physical protection of nuclear facilities, nuclear security management, operators and managers of NMAC systems; as well as for those preparing associated regulations; and persons responsible for computer security at nuclear facilities.

The Employee Assistance Handbook (Paperback): J.M. Oher The Employee Assistance Handbook (Paperback)
J.M. Oher
R4,767 Discovery Miles 47 670 Ships in 10 - 15 working days

Leading experts explain how to establish and run an effective Employee Assistance Program.

Employee Assistance Programs (EAPs) offer counseling and services for a variety of personal problems that affect workers and the workplace.

This Handbook provides clinicians, administrators, and human resource professionals with a comprehensive review of EAP "best practices." Experts from the employee assistance field, behavioral health organizations, and corporate sectors illustrate the unique role EAPs play in maintaining a vibrant and productive workforce and explain the skills and resources needed to provide effective EAP services.

This reference features innovative and groundbreaking program and service initiatives, which incorporate expanded areas of EAP practice while retaining the core mission and technology. The best intervention, treatment, and prevention programs for all issues affecting employee productivity are fully described, including:

  • Substance abuse.
  • Disability.
  • Preventive and managed healthcare.
  • Workplace trauma.
  • Work/family problems.
  • Management development.

    The book also covers services currently in place in such diverse settings as Champion International, Du Pont, Bank One, Wells Fargo Bank, the University of Michigan, Mobil, and L.L. Bean. In addition, it discusses two current issues that will affect EAP practice in the future: accreditation of professionals and programs and the academic and field training of EAP professionals.

    The Employee Assistance Handbook is invaluable reading for any professional who wants to promote health and productivity by creating effective EAP services for his or her organization.

Dow's Chemical Exposure Index Guide (Paperback): AIChE Dow's Chemical Exposure Index Guide (Paperback)
AIChE
R2,096 Discovery Miles 20 960 Ships in 10 - 15 working days

Dow Chemical developed the Chemical Exposure Index to help its engineers design and operate safer facilities. This seminal guide to rating the relative acute health hazard potential of a chemical release to workers and the neighboring community is available to the chemical process community. The index uses a methodology for estimating airborne quantity released, which allows for more sophisticated process analyses.

Special Details: Softcover. The Dow Chemical Exposure Index and the Dow Fire and Explosion Index Hazard Classification Guide and the are designed to complement each other, helping engineers evaluate the total hazard potential of new installations These guides are invaluable resources for process design engineers, plant managers, and others involved in the safe design and operation of chemical plants. Don't take your plant's safety analysis only halfway--Purchase both books and take $10 off the combined list price.

Polychlorinated Dibenzo-Para-Dioxins and Polychlorinated Dibenzofurans - IARC Monograph on the Evaluation of Carcinogenic Risks... Polychlorinated Dibenzo-Para-Dioxins and Polychlorinated Dibenzofurans - IARC Monograph on the Evaluation of Carcinogenic Risks to Humans (Paperback)
International Agency for Research on Cancer
R1,501 Discovery Miles 15 010 Ships in 10 - 15 working days

Evaluates the carcinogenic risks to humans posed by exposure to polychlorinated dibenzo-"para"-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs). PCDDs are formed as inadvertent by-products, sometimes in combination with PCDFs, during the production of chlorophenols and chlorophenoxy herbicides, and have been detected as contaminants in these products. PCDDs and PCDFs may also be produced in thermal processes such as incineration and metal processing and in the bleaching of paper pulp with free chlorine. Of the PCDDs: 2 3 7 8-tetrachlorodibenzo-"para"-dioxin (2 3 7 8-TCDD), or, dioxin, has attracted the greatest concern. PCDDs and PCDFs are ubiquitous in soil, sediment, and air, persist in the environment, and accumulate in animal fat. Excluding occupational and accidental exposures, most human exposure to these compounds occurs from the consumption of meat, milk, eggs, fish, and related products. Occupational exposures at higher levels have occurred since the 1940s as a result of the production and use of chlorophenols and chlorophenoxy herbicides and, for PCDFs, in metal production and recycling. Even higher exposures have occurred in sporadic industrial accidents and following incidents of rice oil contamination. The evaluation, which considered abundant human and animal carcinogenicity data found strong evidence from epidemiological studies in humans that exposure to 2 3 7 8-TCDD produces increased risks for all cancer combined, rather than for any specific site, suggesting that 2 3 7 8-TCDD is an unprecedented multi-site carcinogen with no single site predominating. Citing data from animal studies and other lines of evidence, the monograph concludes that 2 3 7 8-TCDD is carcinogenic to humans. Other polychlorinated dibenzo-"para"-dioxins and dibenzo-"para"-dioxin could not be classified as to their carcinogenicity to humans. For PCDFs, the evaluation considered evidence from two large poisoning incidents involving rice oil contamination in Japan and Taiwan. Although excessive mortality from liver cancer was observed in long-term follow-up of the Japanese cases, the report cited other factors, including a high prevalence of chronic hepatitis B infection in the geographical area concerned, as possible explanations. Evidence of carcinogenicity to human was judged inadequate. In the absence of convincing data from experimental animals, PCDFs could not be classified as to their carcinogenicity to humans.

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