04964nam 22006374a 450 991077860780332120230607203413.00-309-17112-11-280-18476-097866101847670-309-56534-0(CKB)110986584753314(EBL)3377250(SSID)ssj0000123121(PQKBManifestationID)11922732(PQKBTitleCode)TC0000123121(PQKBWorkID)10014656(PQKB)10328594(MiAaPQ)EBC3377250(Au-PeEL)EBL3377250(CaPaEBR)ebr10068494(CaONFJC)MIL18476(OCoLC)923269261(EXLCZ)9911098658475331420010720d2001 uy 0engur|n|---|||||txtccrClassifying drinking water contaminants[electronic resource] for regulatory consideration /Committee on Drinking Water Contaminants, Water Science and Technology Board, Board on Environmental Studies and Toxicology, Division on Earth and Life Studies, National Research CouncilWashington, D.C. National Academy Press20011 online resource (255 p.)Description based upon print version of record.0-309-07408-8 Includes bibliographical references (p. 186-207).""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 Future""""INTRODUCTION""; ""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 PROCESS""""USE 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 Effects""""Criteria 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 Algorithm""""INTRODUCTION""; ""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""""Validation Test Cases""WaterPollutionUnited StatesDrinking waterContaminationUnited StatesDrinking waterHealth aspectsUnited StatesWaterPollutionDrinking waterContaminationDrinking waterHealth aspects363.6/1/0973MiAaPQMiAaPQMiAaPQBOOK9910778607803321Classifying drinking water contaminants3692498UNINA