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INSTRUCTORS:
Jane Clary
Brandon Steets, P.E.
Sponsored by ASCE Continuing Education and ASCE's Environmental & Water Resources Institute.
Purpose and Background
Protection of recreational beneficial uses is becoming one of the most costly and ubiquitous challenges for stormwater managers in the United States. Multi-tiered approaches, and in some cases multi-billion dollar implementation plans, have been developed to address fecal indicator bacteria (FIB) TMDLs. Due to its nature, FIB presents unique challenges. Recent advances in the state-of-the-practice (e.g., innovative stormwater planning tools) and the state-of-the-science (e.g., for source identification and risk assessment) have created opportunities for innovative and adaptive cost-saving approaches to the protection of recreational beneficial uses. This four-part series will probe those challenges and opportunities, based on the recent ASCE report, Pathogens in Urban Stormwater Systems.
This first webinar will provide an overview of the Pathogens report, with discussion on the state-of-the-practice for addressing bacteria and pathogens in urban stormwater systems, including regulations, urban sources, modeling, monitoring, statistical analysis, source tracking, source controls, structural Best Management Practices (BMPs), TMDL case studies, and research needs.
Primary Discussion Topics
- Basic background related to regulatory context for FIB and pathogens
- Sources of pathogens in the urban environment
- Transport and fate issues, along with the factors affecting survival of pathogens and FIB
- Approaches for monitoring, source tracking and evaluating FIB and pathogen data
- Source controls and treatment strategies
- Case studies illustrating challenges and approaches to implementing and complying with FIB TMDL requirements in urban areas
Learning Outcomes
- Understand basic background related to regulatory context for FIB and pathogens, including the difference between pathogens and indicator bacteria
- Recognize the range of sources of pathogens in the urban environment, including human, animal and secondary environmental sources
- Recognize the factors affecting survival of pathogens and FIB
- Obtain a general working knowledge of monitoring and source tracking approaches that can be applied in urban watersheds, including references for more in-depth information
- Understand the types of source controls and treatment strategies that may help to reduce FIB and pathogen loading, including the limitations and costs of these strategies
Webinar Benefits
- Obtain an overview of multi-disciplinary issues related to bacteria stream impairments
- Obtain a summary of the current regulatory drivers related to FIB
- Understand how human and non-human sources of FIB can lead to FIB impairment
- Recognize the factors affecting survival of pathogens and FIB
- Find out about the latest source tracking techniques useful for identifying sources of FIB
- Hear about the latest BMP performance analysis findings for structural and non-structural practices for reducing FIB loading
- Learn more about the costs associated with load reduction plans for FIB
Intended Audience
- Public Works managers and staff
- Attorneys
- Regulators
- Consultants
- Scientists
Webinar Outline
- Basic background related to regulatory context, pathogens in receiving waters and the use of FIB as surrogates for pathogens
- Sources of pathogens in the urban environment
- Transport and fate issues, along with the factors affecting survival of pathogens and FIB. Although an evaluation of models for FIB is beyond the scope of this report, understanding of transport and fate issues affects the ability of water resources scientists and engineers to develop models for FIB
- Approaches for monitoring, source tracking, and evaluating FIB and pathogen data, including a discussion of challenges associated with these activities
- Source controls and treatment strategies, including expected effectiveness, data gaps, and practical constraints related to source controls, structural stormwater controls, and disinfection
- Case studies illustrating challenges and approaches to implementing and complying with FIB total maximum daily load (TMDL) requirements in urban areas