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NHEXAS PHASE I REGION 5 STUDY--QUALITY SYSTEMS AND IMPLEMENTATION PLAN FOR HUMAN EXPOSURE ASSESSMENT STUDY (RTI/5740/02-02QSIP)

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WARNING! DATA USE RESTRICTIONS

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The EPA does all it can to ensure that the identity of survey participants cannot be disclosed. All direct identifiers, as well as any characteristics that might lead to identifications, are omitted from the data. Any intentional identification or disclosure of a person or establishment violates the assurances of confidentiality given to the providers of the information. Therefore, users will (1) use the data in this study for statistical reporting and analysis only; (2) make no use of the identity of any person or establishment discovered inadvertently and will advise the HEDS Administrator of any such discovery; (3) will not link this data with individually identifiable data from other EPA or non-EPA data.

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Citation:

NHEXAS PHASE I REGION 5 STUDY--QUALITY SYSTEMS AND IMPLEMENTATION PLAN FOR HUMAN EXPOSURE ASSESSMENT STUDY (RTI/5740/02-02QSIP). U.S. Environmental Protection Agency, Washington, D.C., 1995.

Description:

The RTI/EOHSI Consortium scoping studies were designed to be part of the total NHEXAS framework that was developed as a result of a series scientific discussions and workshops conducted by the US EPA from 1992 through 1993. Several scientific issues needed to be addressed to evaluate the feasibility, costs, and benefits of a national exposure program. Included were methods evaluation, population and statistical sampling, selection of data quality objectives, and pathway identification for total exposure. In order to determine the feasibility of the NHEXAS to characterize total human exposure, the consortium evaluated protocols and tested hypotheses for contaminants that potentially have multi-media and multiple routes of exposure. The contaminants of concern included selected metals and volatile organic compounds. The first tier contaminants to be measured were lead and arsenic; and benzene, chloroform, and halocarbons. The central hypothesis of the NHEXAS Region 5 study was that individual and population exposures determined by modeled or extant data will be significantly different from those determined directly from multi-pathway and multi-media measurements. Sample collection was performed by RTI/EOHSI consortium. Analyses of the external marker and biological marker samples was completed by RTI/EOHSI or Federal laboratories associated with the CDC, FDA, and EPA. A data management system was implemented for these data. The study examined a probability based population sample for total exposure in counties located throughout EPA Region 5. The units for sampling were households and the individuals residing within each household. Keywords: study; human exposure.

The National Human Exposure Assessment Survey (NHEXAS) is a federal interagency research effort coordinated by the Environmental Protection Agency (EPA), Office of Research and Development (ORD). Phase I consists of demonstration/scoping studies using probability-based sampling designs. The Region 5 study was conducted in EPA's Region 5 (Ohio, Michigan, Illinois, Indiana, Wisconsin, and Minnesota), and included personal exposure, residential concentration, and biomarker measurements of metals and VOCs. The study was conducted by the Research Triangle Institute (RTI) and the Environmental and Occupational Health Sciences Institute (EOHSI). The scope and design of the study are detailed in the following article: E. Pellizzari et al., Population-Based Exposure Measurements in EPA Region 5: A Phase I Field Study in Support of the National Human Exposure Assessment Survey. Journal of Exposure Analysis and Environmental Epidemiology, Vol. 5, No. 3, 1995, pp. 327-358.

NOTE: The U.S. Environmental Protection Agency (EPA), through its Office of Research and Development (ORD), partially funded and collaborated in the research described here. This SOP is part of the Quality Systems Implementation Plan (QSIP) that was reviewed by the EPA and approved for use in the Region 5 study. Mention of trade names or commercial products does not constitute endorsement or recommendation by EPA for use.

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Record Details:

Record Type:DOCUMENT( REPORT )
Product Published Date:05/31/1997
Record Last Revised:12/10/2002
Record ID: 16579