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Nicholas Dugan
US EPA ORD National Risk Ma
Region 5 and Neighboring Sta
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HABs: Overall Problems
HABs have the potential to generate
adverse health, ecosystem and economic
impacts.
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Many different types of toxins Pure toxins in laboratory studies exert toxic effects on liver and nervous system Exposure through ingestion Exposure though recreational activity body contact--associated with gastrointestinal effects,
breathing difficulty, skin irritation, and animal deaths
> Water treatment facilities may need to alter operational practices and/or invest in new equipment economic burden
> Health effects beach closures loss of recreational/aesthetic value economic burden
> Large blooms upset water chemistry (pH, dissolved oxygen) and limit the penetration of sunlight -> declines in fish populations -> loss of recreational/aesthetic value economic burden, long term ecosystem damage
> Large blooms are odorous and unsightly reluctance to swim economic burden
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HABs: Overall Problem
During the 2017 bloom season, US EPA was aware of blooms, beach closures and/or health advisories in 27 states and DC.
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Actions: Research Approach
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Actions: Protection Monitoring and Remote Sensing
Lake Harsha. Ohio
Overlay Satellite Data
Overflight on 6/18/2017 at 10:49
Optical signature of cyanobacterial pigments:
ID = Low Concentration = High Concentration = No Data
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&EPA
Actions: Monitoring and Remote Sensing
Integrate satellite data with "on the lake" sampling results for toxins (microcystins)
EPA health advisory concentration = 0.3 pg/Lfor pre-school aged children
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Impact: Monitoring and Remote Sensing
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Actions: Analytical Methods
Collaboration with Ohio ERA to validate quantitative PCR method
(Rapid detection of genetic material from toxin-producing cyanobacteria)
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Agreement for samples split between Ohio and federal EPA laboratories
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Actions: Analytical Methods
Toxin Analysis in Fish Tissues
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Fathead minnows exposed to toxins in artificial streams -> toxins successfully recovered from whole-fish tissue samples
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Impact: Analytical Methods
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Actions:
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Drinking Water Treatment
Toxin Removal through Granular Activated Carbon (GAC) Impact of prior GAC use
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Prior use decreases the ability of GAC to remove toxins
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Impact: Drinking Water Treatment
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!;Astniv>jUV.),' "ii >t<s Protection Actions and Impact: Ohio Lakes
Providing Technical Assistance to States
Lake Erie
Monitoring cyanobacteria toxins through multiple years in numerous treatment plants
Conducting bench- and pilot-testing
Satellite monitoring program
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Harsha Lake
Nutrient and HAB bloom dynamics Treatment performance at local water utility Nutrient trading program: reduce nutrient loadings
at lowest cost by expanding the number of participants that have incentives to purchase credits
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Actions and Impact: Toledo, OH
Providing Technical Assistance to States
Do Not Drink Advisory Issued by the State
In August 2014, Ohio EPA requested ORD's technical assistance to analyze drinking water for the presence of cyanobacterial toxins resulting in a harmful algal bloom.
ORD Technical Assistance
Samples flown directly to Cincinnati on numerous occasions
Performed multiple analyses around the clock until the crisis was resolved
Provided technical assistance to the city and state 24/7:
- Confirmed extent of problem the potential for resolution, via treatment Resolved sample handling and analytical procedures Helped brief Ohio EPA Administrator, Mayor of Toledo, Governor and Members of Congress at various times during
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"Your efforts were instrumental in restoring safe drinking water to
over Vz million Ohioans and exemplifies a great example of how
local, state andfederal agencies are able to work together, mobilize
essential resources and address critical issues."
--Governor John R. Kasich (in s letter to US EPA staff)
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Contact
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Nicholas Dugan
US EPA Office of Research and Development National Risk Management Research Laboratory Cincinnati, OH
513- 569-7239
Other Lake monitoring: Joel Allen (alienJoei@epa.gov), Christopher Nietch (nietch.Christopher@epa.gov)
Satellite remote sensing: Blake Schaeffer (schaeffer.blake@epa.gov)
Toxin analysis (in water): Heath Mash
), Toby Sanan
tissue): Toby Sanan (sanan.fobv@epa.gov), Jim Lazorchak (
); (in fish
Microbial analysis (Ohio EPA collaboration): Jorge SantoDomingo (metabolic activity): Jingrang Lu (lu.iingrang@epa.gov)
Drinking water treatment (granular activated carbon): Jonathan Pressman (physical removal, potassium permanganate): Nicholas Dugan
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