Classifying drinking water contaminants for regulatory consideration /

This is the third report by the Committee on Drinking Water Contaminants (jointly overseen by the National Research Council's [NRC's] Water Science and Technology Board and Board on Environmental Studies and Toxicology). The committee was formed early in 1998 at the request of EPA's O...

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Detalles Bibliográficos
Clasificación:Libro Electrónico
Autor Corporativo: National Research Council (U.S.). Committee on Drinking Water Contaminants (Autor)
Formato: Electrónico eBook
Idioma:Inglés
Publicado: Washington, D.C. : National Academy Press, [2001]
Temas:
Water > Pollution > United States.
Drinking water > Contamination > United States.
Drinking water > Health aspects > United States.
Water-supply.
Water Supply
Water Pollution
Eau potable > Contamination > États-Unis.
Eau > Approvisionnement.
TECHNOLOGY & ENGINEERING > Environmental > Water Supply.
Drinking water > Contamination.
Drinking water > Health aspects.
Water > Pollution.
United States
United States.
Acceso en línea:Texto completo
Tabla de Contenidos:
  • Classifying Drinking Water Contaminants for Regulatory Consideration
  • Copyright
  • Preface
  • Contents
  • Executive Summary
  • RECOMMENDED APPROACH FOR THE DEVELOPMENT OF FUTURE CCLS
  • Two-Step Approach
  • Sociopolitical Considerations
  • Universe to PCCL
  • PCCL to CCL
  • Contaminant Attributes
  • Developing and Implementing a Prototype Classification Approach
  • IDENTIFYING AND ASSESSING EMERGING WATERBORNE PATHOGENS
  • Virulence-Factor Activity Relationships
  • Framework
  • Feasibility
  • VFAR Conclusions and Recommendations
  • 1 Drinking Water Contaminant Candidate List: Past, Present, and FutureINTRODUCTION
  • DEVELOPMENT OF THE 1998 CCL
  • IMPLEMENTATION STATUS OF THE 1998 CCL
  • Research Plan for 1998 CCL
  • LIMITATIONS OF THE FIRST CCL DEVELOPMENT PROCESS
  • RELATED SDWA PROGRAMS
  • National Drinking Water Contaminant Occurrence Database
  • Unregulated Contaminant Monitoring Regulation
  • IDENTIFYING AND SELECTING CONTAMINANTS FOR FUTURE CCLS
  • PERSPECTIVE OF THIS REPORT
  • 2 Sociopolitical Considerations for Developing Future CCLs
  • INTRODUCTION
  • LIMITATIONS OF THE FIRST CCL DEVELOPMENT PROCESSUSE OF SOUND SCIENCE IN FUTURE REGULATORY DECISIONS
  • NATURE OF THE TASK
  • RISK PERCEPTION
  • PROTECTION OF VULNERABLE SUBPOPULATIONS
  • TRANSPARENCY AND PUBLIC PARTICIPATION
  • Transparency
  • Public Participation
  • SUMMARY: CONCLUSIONS AND RECOMMENDATIONS
  • 3 The Universe of Potential Contaminants to the Preliminary CCL
  • INTRODUCTION
  • TWO-STEP APPROACH
  • THE UNIVERSE OF POTENTIAL DRINKING WATER CONTAMINANTS
  • DISTINGUISHING THE PCCL FROM THE UNIVERSE
  • GUIDELINES FOR DEVELOPING SCREENING CRITERIA
  • Criteria for Potential and Demonstrated Health EffectsCriteria for Potential and Demonstrated Occurrence
  • FATE OF THE PCCL
  • SUMMARY: CONCLUSIONS AND RECOMMENDATIONS
  • 4 PCCL to CCL: Attributes of Contaminants
  • INTRODUCTION
  • OVERVIEW OF CONTAMINANT ATTRIBUTES
  • Severity
  • Potency
  • Prevalence
  • Magnitude
  • Persistence-Mobility
  • LESSONS LEARNED IN APPLYING THESE CRITERIA
  • Monitoring Data
  • Potency Compared to Monitoring Data
  • Severity
  • Severity and Potency
  • SUMMARY: CONCLUSIONS AND RECOMMENDATIONS
  • 5 PCCL to CCL: Classification AlgorithmINTRODUCTION
  • OVERVIEW OF CLASSIFICATION SCHEMES
  • Expert Judgments
  • Rule-Based Methods
  • Prototype Classification Methods
  • Which Strategy to Use?
  • ILLUSTRATIVE EXAMPLE OF A PROTOTYPE CLASSIFICATION SCHEME FOR CCL CONTAMINANTS
  • The Training Data Set
  • Attribute Scoring
  • Prototype Classification Functions
  • Classification Results Using a Linear Classifier
  • Classification Results Using a Neural Network Classifier
  • DEMONSTRATED USE OF THE TRAINED CLASSIFIER
  • Examination of Misclassified Contaminants

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