Development of Disinfection Dosing Protocol

On May 27th and 28th, the optimization team partnered with staff from the Pennsylvania Department of Environmental Protection to pilot a protocol that was developed to assess process control of chlorine and ammonia dosing at two chloraminated water systems in the Pittsburgh area.  The ratio of chlorine-to-ammonia in the finished water entering a distribution system should be consistently maintained within a desired range to decrease the likelihood of nitrification and increase the stability of monochloramine in the distribution system.  Feedback from participants will be used to enhance the protocol, which will become a component of future comprehensive performance evaluations for chloraminated distribution systems.  (Matthew Alexander & Alison Dugan, US EPA, TSC)


Region 6 & 7 AWOP Strategic Planning Meeting

The TSC optimization team, in partnership with Region 6, Region 7, and ASDWA, led a strategic planning meeting and technical workshop on May 5th – 7th in Dallas, TX.   Representatives of drinking water programs from Arkansas, Iowa, Louisiana, Missouri, New Mexico, Oklahoma, and Texas reported on ongoing AWOP implementation efforts and reported on water quality improvements in their state.  Kansas drinking water program staff members also participated in the meeting to learn more about the AWOP.  Due to increased participation from Region 6 and 7 states, two simultaneous workshops were conducted to accommodate the size of the group.  A disinfection data integrity workshop was conducted at Park Cities MUD water treatment plant and a turbidity data integrity workshop was conducted at the City of Midlothian water treatment plant.  Significant topics during the meeting included prioritization of system performance, DBP optimization, and the difference between detectable and measurable chlorine residual.  Meeting participants plan to incorporate the workshop concepts and information from group discussions into their respective state’s PWSS program activities.  (Matthew Alexander, US EPA, TSC)

Optimization Team Presentation at Pennsylvania Stakeholder Meeting

On May 26, the optimization team presented to the Board of the Small Systems Technical Assistance Center as part of their process to consider increasing the minimum disinfectant residual requirement for water systems in Pennsylvania, from the current level of “detectable.”  The presentation, entitled Area-Wide Optimization Program’s (AWOP) Approach to Maintaining Distribution System Water Quality, highlighted the water quality and monitoring goals that AWOP promotes. It also described optimization-based evaluation and water quality management strategies that AWOP state partners teach to water systems working to address disinfection byproduct and disinfectant residual concerns in their plant and distribution system.  (Alison Dugan & Matthew Alexander, US EPA, TSC)

Region 10 AWOP Strategic Planning Meeting

The TSC optimization team, in partnership with ASDWA, led a remote strategic planning meeting from May 19 to 21, 2015 in Spokane and Kennewick, WA.   Representatives of drinking water programs from Oregon, Washington, and Utah reported on ongoing AWOP implementation efforts.  US EPA Region 8, Colorado, Idaho and Montana drinking water program staff members also participated in the meeting, both in person and remotely, to learn more about the program.  A membrane workshop focused on data integrity and log removal value verification at the City of Kennewick, WA water treatment plant.  Representatives of EPA R8, CO, ID and MT were very positive about the value of AWOP and will continue discussion and garnering interest in their home offices for future participation.  (Tom Waters & Rick Lieberman US EPA, TSC)