• Case History of a 3.4 MGD RO Plant Treating Brackish Groundwater
  by Edward H. Talton, Jr., P.E.on (Friday, June 26. 2009)
  
  Description:  St. Lucie West Services District in Port St. Lucie, Florida provides potable water to residential and commercial customers in its service area. An exponential increase in demand for high quality water to support population growth, economic expansion, and existing customers is being experienced in many areas of the United States. Driven by these factors, the District needed to expand its 2 MGD reverse osmosis water treatment plant. This paper provides an overview of the design requirements for a 3.4 MGD expansion of a reverse osmosis water treatment plant using brackish groundwater from a coastal aquifer.

• Successful Completion of a Uni-Directional Flushing Program in Florida
  by C. Robert Reiss, Ph.D., P.E.on (Monday, June 22. 2009)
  
  Description:  Reiss Engineering Presentation

• Water Quality Model Verification Field Tested Process, Results, and Benefits
  by Edward H. Talton, Jr., P.E., Brandon C. Bryant, et al.on (Monday, June 22. 2009)
  
  Description:  Reiss Engineering Presentation

• Quantification of Potable Water Savings Derived From a Residential Irrigation Audit Program in Seminole County, Florida
  by Terrence McCue, P.E., James Murin, P.E., and Debbie Meinerton (Thursday, June 18. 2009)
  
  Description:  Projected growth and associated increased groundwater withdrawals have led to growing concerns about sustainable use of groundwater resources in Central Florida. Although Seminole County has participated consistently in water conservation education and other programs over the years, recent focus on water planning for the future has created the impetus for an expanded water conservation program. Quantifying direct potable water savings in water conservation programs can be difficult, thus a quantification method is suggested. This article will offer a detailed review of the data analysis to provide a framework for municipalities seeking to conserve water by implementing a residential irrigation audit program.

• Permitting Process for Tampa Bay Seawater Desalination Remediation Project
  by Christophe M. Robert, Ph.D., P.E.on (Thursday, June 18. 2009)
  
  Description:  Tampa Bay Water owns a 25 MGD Seawater Desalination Facility on the West Coast of Florida to treat seawater from the Gulf and sale the water to the six governments (3 cities and 3 counties). Performance of the seawater facility has not met the goals set by Tampa Bay Water in the past. The modifications to improve performance of the facility consist of adding a conventional coagulation-flocculation-sedimentation prior to sand filtration and adding a diatomaceous earth filtration treatment downstream the sand filtration. In addition, post treatment pH adjustment process was modified. Prior to the construction of the modifications, six permits had to be issued by State and local agencies. This paper will present the different steps, requirements, preliminary studies and laboratory analyses necessary to obtain the various permits for the reverse osmosis facility modifications within a tight schedule.

• Optimize Water Distribution Quality by Evolving Your Hydraulic Model and Utilizing Operational SCADA
  by Edward H. Talton, Jr., P.E.on (Thursday, June 18. 2009)
  
  Description:  Potable water utilities maintain and utilize hydraulic models to help efficiently plan, operate and expand distribution systems. By evolving a hydraulic model to include water quality modeling capabilities and truthing the model with existing utility operational SCADA data, utilities can expand the benefits of the hydraulic model to include minimizing water age, compliance with distribution water quality regulations, flushing plan optimization, disinfectant residual optimization, operational cost reductions, operational storage evaluations, and guidance for water quality and field sampling personnel. The objective of this paper is to present utilities an approach containing specific action items that, when implemented will optimize water quality in the potable water distribution system.

• An Innovative Approach to Optimize Reverse Osmosis Membrane Performance
  by Lance R. Littrell, P.E. and Glenn W. Dunkelberger, P.E.on (Thursday, June 18. 2009)
  
  Description:  Reverse osmosis water treatment plants have several key aspects to monitor for proper operation and control. Many small utility’s plants have been installed without the necessary monitoring devices and preventative maintenance tactics used in sustaining well quality and performance. This paper provides an innovative detailed design approach to right inadequate design, control features and deteriorating wells while optimizing performance from Reverse Osmosis Membranes. Achieving an optimum membrane performance through a twice modified membrane plant requires reconfiguring piping, sensing devices and adding new equipment as will be discussed in the paper.

• Development of a Water Supply Plan for Polk County and Its Municipalities
  by Gary ReVoir II, P.E., Marc Cannata, P.E., et al.on (Thursday, June 18. 2009)
  
  Description:  Polk County’s primary goal is to provide safe, reliable, and satisfactory water, wastewater, and reclaimed water service to existing and future customers at reasonable rates. Historically, Polk County and its Municipalities have provided potable water for both domestic use and irrigation, drawing the supply from groundwater wells located throughout the twenty three utility service areas. The purpose of this project was to provide Polk County with an implementation plan to identify and develop new viable sources of water supply to meet future potable water demands, without adversely impacting the State’s environmental restoration goals and minimum flows/levels. The development of these options included researching conservation, reclaimed water, surface water, ground water, and other alternative supplies sources. This paper provides a review of the project approach, major hurdles, and results of this study.