The Stage 2 D/DBPR and LT2ESWTR--Where are We Going. J. Alan Roberson, P.E. Director of Regulatory Affairs AWWA-Washington, DC. Outline. Overview of the M/DBP Cluster Overview of IESWTR and Stage 1 D/DBPR Preliminary ICR Data Analysis Where the LT2ESWTR and Stage 2 D/DBPR May Be Going.
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J. Alan Roberson, P.E.
Director of Regulatory Affairs
Utility and Plant Level Data
Sampling Results Data
Treatment Operation DataAuxiliary Database Relationships
CT & Disinfectant Decay
Sludge Production .
Distribution System DBPs
Model Interface/ Database
Graphical User Interface (GUI)
Selection CriteriaSurface Water Analysis Tool Data Process Overview
Vulnerability Index Levels
Incorrect of Concern
Classifying Potential Categories Estimating MeansDistinguish relative amounts of Cryptosporidium in source water
Plant Highest Running Action to Reduce
Category Annual Mean Exposure
A < 0.01/L No Action
B > 0.01/L to < 0.1/L No Action/“Toolbox ”
C >0.1/L to < 1.0/L “Toolbox”
D >1.0/L “Toolbox ”
Challenges = (1) assigning category shift values and
(2) implementation transaction costs for utilities and States