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Environmental Assessment

Recent Additions for 1998

December 22, 1998
Benchmark Dose Software

December 16, 1998
Integrated Risk Information System (IRIS); Announcment of 1999 Program; Request for Information [FRL-6200-3]

November 16, 1998
Technical Workshop on Issues Associated with Dermal Exposure and Uptake

November 9, 1998
Toxicological Review of Benzene (Non-Cancer Effects) Extension of Closing Date to Dec 31, 1998

October 23, 1998
Report of the Meeting to Peer-Review "The Inventory of Sources of Dioxin in the United States

October 9, 1998
Call for Papers: Conference on Topics in Toxicology and Risk Assessment (12-15 April 1999)
NOTE: This web page is no longer available.

October 5, 1998
Toxicological Review of Benzene (Non-Cancer Effects)

September 24, 1998
Health Effects of Inhaled Crystalline and Amorphous Silica

September 24, 1998
A Case Study of Soils in the United States

September 2, 1998
You can now search using EIMS!

July 28, 1998
Report on Shrimp Virus Peer Review and Risk Assessment Workshop: Developing a Qualitative Ecological Risk Assessment Draft Final EPA/630/R-98/001A

July 27, 1998
President Clinton Names Norine E. Noonan as Assistant Administrator for Research and Development at the U.S. Environmental Protection Agency
NOTE: This web page is no longer available.

July 22, 1998
Mathematical Statistician Opening, GS-1529-11/12/13/14CLOSED
NOTE: This web page is no longer available.

July 21, 1998
Technical Workshop on Exposure-Duration and Toxicity Relationships

June 22, 1998
Solicitation for Applications for a Cooperative Agreement CLOSED
Regarding Risk Assessment Meetings, Forums, &Related Events Covering Scientific Risk Assessment Areas Pertinent to the U.S. EPA National Center for Environmental Assessment. NOTE: This web page is no longer available.

June 22, 1998
Solicitation for Applications for Cooperative Agreements CLOSED
Regarding Soil Chemistry Issues in the Development of Ecological Soil Screening Levels. NOTE: This web page is no longer available.

June 17, 1998
Chloroethane Carcinogenicity (CAS No. 75-00-3) EPA/600/R-95/099
Chloroethane (CE; CAS No. 75-00-3) can alkylate cellular constituents but binding studies do not exist. CE is mutagenic in four tester strains of Salmonella typhimurium, plus and minus S9 activating fraction.

June 17, 1998
Nitrobenzene Carcinogenicity (CAS No. 98-95-3) EPA/600/R-95/100
Nitrobenzene (NB, CAS No. 98-95-3) oxidizes to p-aminophenol and p-nitrophenol in animals and humans, while being reduced also to nitrosobenzene, phenylhydroxylamine, and aniline. The reductants are known to cause methemoglobinemia and anemia. NB is negative for mutagenicity systems in Salmonella, hepatocyte repair, or sister chromatid exchange assays.

June 15, 1998
Research Strategy for Oxygenates in Water EPA/600/P-97/001A
Oxygenates are chemicals added to fuels ("oxyfuels") to increase the oxygen content and thereby reduce certain emissions from use of the fuel. Of the several ethers and alcohols that may serve as oxygenates, methyl tertiary butyl ether (MTBE) is the most commonly used. Although the contamination of ground and surface waters by motor vehicle fuels and fuel additives is not a new problem, recent events have focused attention on what appear to be somewhat different characteristics associated with oxyfuels, including the higher solubility and potentially greater persistence of MTBE in ground water than other components of gasoline.

June 10, 1998
FINAL Carcinogenic Effects of Benzene: An Update EPA/600/P-97/001F
The major issue addressed in this document involves the nature and magnitude of the risk of cancer to humans exposed to low levels of benzene. Occupational studies continue to provide the bulk of evidence of benzene's carcinogenicity. Workers are exposed at much higher levels than is the general public. This document verifies that benzene is a known human carcinogen by all routes of exposure.

May 4, 1998
Guidelines for Ecological Risk Assessment
These are the first Agency-wide Guidelines for Ecological Risk Assessment. The Guidelines expand on and replace the 1992 report Framework for Ecological Risk Assessment, maintaining the same structure for the ecological risk assessment process: problem formulation, analysis, and risk characterization. The Guidelines emphasize that the interface between risk assessors, risk managers, and interested parties is critical for ensuring that the results of the assessment can be used to support a management decision.

April 27, 1998
The Inventory of Sources of Dioxin in the United States

March 31, 1998
Exposure Factors Handbook Volume I, II, III
The Exposure Factors Handbook provides a summary of the available statistical data on various factors used in assessing human exposure. This Handbook is addressed to exposure assessors inside the Agency as well as outside, who need to obtain data on standard factors needed to calculate human exposure to toxic chemicals. These factors include: drinking water consumption, soil ingestion, inhalation rates, dermal factors including skin area and soil adherence factors, consumption of fruits and vegetables, fish, meats, dairy products, homegrown foods, breast milk intake, human activity factors, consumer product use, and residential characteristics.

March 27, 1998
Health Assessment Document for Diesel Emissions, SAB Review Draft
The US. EPA has prepared a draft assessment of the possible health hazards from human exposure to diesel engine exhaust emissions. This 1998 draft assessment is an update of a December 1994 draft assessment that was reviewed in 1995 by the Agency's Clean Air Scientific Advisory Committee (CASAC). The 1998 assessment focuses on health hazards (hazard identification and dose-response analysis for the purpose of recommending measures of risk/hazard), and also provides background information about diesel engine emissions that is useful for putting the health information into context.

March 26, 1998
Assessment of Thyroid Follicular Cell Tumors
The U.S. Environmental Protection Agency (U.S. EPA) conducts risk assessments on chemicals for carcinogenicity under the guidance provided in its cancer risk assessment guidelines (U.S. EPA, 1986a; 1996). From time to time scientific developments prompt the Agency to reexamine procedures that are generally applied. That is the case with the review of some chemicals that have produced thyroid follicular cell tumors in experimental animals. The purpose of the Risk Assessment Forum report Assessment of Thyroid Follicular Cell Tumors (EPA/630/R-97-002) is to describe the procedures U.S. EPA will use to evaluate these tumors and the data that are needed to make these judgments.

March 13, 1998
Call for Papers: GIS in Public Health 3rd National Conference
The Agency for Toxic Substances and Disease Registry (ATSDR), with institutional cosponsors and partnerships with California State University at Fresno, the Centers for Disease Control and Prevention (CDC), Bureau of the Census, US Environmental Protection Agency (USEPA), the US Geological Survey (USGS), the American Public Health Association (APHA), the National Association of County and City Health Officials (NACCHO), the Association of State and Territorial Health Officials (ASTHO), and the National Center for Geographic Information and Analysis (NCGIA), is sponsoring a GIS in Public Health conference August 18-20, 1998, in San Diego, California. San Diego State University will host the conference. This conference will highlight innovative applications of GIS (geographic information systems) and spatial analysis techniques for the protection of public health and the environment.

March 6, 1998
Dioxins and Related Compounds
A substantial new homepage describing NCEA's Dioxin Reassessment efforts can now be found at www.epa.gov/ncea/dioxin.htm, or it can be easily accessed from the NCEA homepage (under the title, Risk Assessments). Linked to the Dioxin Reassessment homepage is a second page which provides a detailed description of a research program being conducted jointly by NCEA and OPPTS titled, the Dioxin Exposure Initiative (www.epa.gov/ncea/dei.htm). Begun in 1994, the fundamental goal of the initiative is to quantitatively link dioxin sources to general population exposures. This is accomplished through a variety of projects which involve, for example, source measurements, environmental media and national food surveys, and fate and transport modeling.

March 5, 1998
Post Doctoral Positions available in ORD/National Center for Environmental Assessment CLOSED
As part of the U.S. Environmental Protection Agency's (EPA's) effort through its Office of Research and Development (ORD) to recruit 50 post-doctoral candidates to fill positions in EPA laboratories and centers, the National Center for Environmental Assessment (NCEA) is seeking post-doctoral candidates from a wide range of disciplines for its divisions in Washington, DC, Research Triangle Park, NC, and Cincinnati, OH.

February 11, 1998
Health Risk Assessment of 1,3-Butadiene

February 4, 1998
Dr. Joel Scheraga Named Program Director of ORD's Global Change Research Program
NOTE: This web page is no longer available.

January 28, 1998
Cancer Guidelines Implementation: Setting Priorities for Future Assessments of Chemicals/Agents (Draft) (attachment to the Federal Register of 1-28-98).

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