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USEPA Consolidated Human Activity Database (CHAD)

Description: 

CHAD is a database that includes many useful activity pattern data sets, and can be downloaded from the USEPA website. It includes the National Human Activity Pattern Survey (NHAPS) data.

From the website: " [The] Consolidated Human Activity Database (CHAD) contains data obtained from pre-existing human activity studies that were collected at city, state, and national levels. CHAD is intended to be an input file for exposure/intake dose modeling and/or statistical analysis. CHAD is a master database providing access to other human activity databases using a consistent format. This facilitates access and retrieval of activity/and questionnaire information from those databases that EPA currently has access to and uses in its various regulatory analyses ...."

Analysis of the National Human Activity Pattern (NHAPS) Respondents from a Standpoint of Exposure Assessment

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Technical Report

Description: 

USEPA report containing a first analysis of data from the 1992-94 National Human Activity Pattern Survey (NHAPS)

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Descriptive Statistics Tables from a Detailed Analysis of the National Human Activity Pattern Survey (NHAPS) Data

Document Type: 

Technical Report

Description: 

USEPA report containing many descriptive statistics tables based on the diary and main data from the 1992-94 National Human Activity Pattern Survey (NHAPS).

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The National Human Activity Pattern Survey (NHAPS): A Resource for Assessing Exposure to Environmental Pollutants

Document Type: 

Journal Article

Description: 

Article on the national human activity pattern survey (NHAPS), which interviewed 9,386 Americans by telephone on their potential exposure to household air and water contaminants

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