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Activity Number:
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231
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Type:
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Invited
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Date/Time:
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Tuesday, July 31, 2007 : 8:30 AM to 10:20 AM
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Sponsor:
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Section on Statistics and the Environment
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| Abstract - #308046 |
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Title:
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Virus and Indicator Occurrence in Ground Water Sources of Public Drinking Water
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Author(s):
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Michael J. Messner*+ and Crystal Rodgers
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Companies:
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U.S. Environmental Protection Agency and U.S. Environmental Protection Agency
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Address:
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Office of Ground Water and Drinking Water, Washington, DC, 20460,
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Keywords:
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environmental ; hierarchical
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Abstract:
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Promulgated in 2006, the Ground Water Rule will require utilities to test their source waters for fecal contamination whenever total coliforms are found to be present in their distribution systems. When fecal contamination is found in a well, action must be taken to eliminate or reduce the associated public health risk. To assess the health and economic impacts of these requirements, EPA needed to assess the occurrence of enteroviruses and E. coli (an indicator of fecal contamination) in ground water wells. This paper describes the occurrence data that were used to inform a hierarchical model of virus and indicator occurrence. Results are presented in terms of parameter estimates, baseline risk, and probabilities of taking action as a result of the new rule.
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