Oregon HABs Workshop

On August 23rd, TSC participated in the Oregon Health Authority Permanent Cyanotoxin Regulation Workshop/Webinar. TSC presented information on the EPA drinking water method development process, technical details and overviews of EPA drinking water cyanotoxin methods, and explanations of the results of the discussed methods. Discussions also included how the EPA drinking water cyanotoxin methods were being applied to the UCMR 4 Program. The workshop was primarily attended by Oregon drinking water laboratories and public utilities in preparation for State regulatory decisions being made on cyanotoxins and HABs. (Will Adams, SRMD/ TSC)

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EPA OW/ORD/Regions HABs Workgroup

On August 21st, TSC gave a presentation to the EPA OW/ORD/Regions HABs Workgroup. TSC provided a survey of the EPA drinking water cyanotoxin methods, including technical overviews of the various methods and a discussion on the meanings of Method 544 and Method 546 results. The workgroup consists of project managers, scientists, and engineers from OW, ORD, and the EPA Regions concerned with current HAB issues. (Will Adams, SRMD/ TSC)

Optimization Program ­­– EPA Small Systems Webinar

On June 5th, Tom Waters (of TSC’s Optimization Team), co-presented with Nick Dugan (of ORD/NRMRL) in the ORD/OW Small Systems Webinar Series. Their presentation, entitled Conventional Treatment Options for Harmful Algal Blooms, focused on surface waters impacted by harmful algal blooms (HABs). Topics included cyanobacterial cell and cyanotoxin removals through coagulation, sedimentation and filtration; propagation of cyanotoxins and indicator parameters of cyanobacterial biomass through a surface water treatment facility; removal of cyanobacterial toxins by powdered activated carbon (PAC); the impact of permanganate oxidation on cyanobacterial cell integrity, toxin release, and toxin degradation; and toxin degradation by free chlorine. A considerable amount of information shared during this presentation was attained through the Optimization Team’s pilot project with Ohio EPA to develop a HAB-focused water treatment plant “comprehensive performance evaluation” (CPE) tool.  Almost 1,400 attendees participated, representing all 50 states, 10 EPA Regions, 10 Tribal Nations, 1 territory, and 14 countries (Tom Waters, US EPA/ TSC).

Microbial / Harmful Algal Bloom (HAB) CPE in Partnership with Ohio EPA

The TSC Optimization team, in partnership with Ohio EPA, conducted a developmental HAB CPE at the City of Delphos Water Treatment Plant in Delphos, OH during the week of March 19-23, 2018. This CPE was the last of a series of four pilot CPEs designed to develop an optimization evaluation tool for water treatment plants (WTPs) challenged by HABs. The CPE also served as a training opportunity for Ohio EPA staff, which included participants from all of the state’s district offices and central office. The evaluation at the Delphos WTP identified factors that could limit the plant’s performance during a HAB. Delphos staff were receptive to the week-long evaluation. They indicated that the CPE findings were informative and identified plans for further study to address the identified factors. Future engagement with Ohio EPA on water treatment plant optimization to address HABs is under consideration.

Tom Waters, Rick Lieberman, Alison Dugan and Matt Alexander; US EPA/ TSC.