CLIENT NAME - Sarasota.WaterAtlas.org

• Some PLCs have been upgraded to Allen-Bradley PLCs, and others are in need ofreplacement.• Cartridge filters require little maintenance and they replace them once every 4 months(all at the same time). They run all 4 at all times.• Pressure is measured after the cartridge filters and PLC sends info to feed pumps(which are on VFDs) to keep pressure constant.• The EDR feed header splits into 2 sides.• There are 320 stacks that process 1.5 mgd (produce 1.2 mgd).• Each unit has 8 trains, 4 stages per train. Each stage acheives a 30% TDS reduction.• The first stage is run at higher voltage, all run at 70 psi.• There are 300 pairs of membranes per stack (anion and cation).• The facility staffs 14 people: 2 supervisors, 1 pump mechanic, and 11operators/maintenance. The facility is staffed 24 hours per day with at least 2 peopleper shift.• The electrodes in the EDR units are replaced approximately every 5 years (more oftenfor the first stage).• EDRs run in a high voltage, low amp configuration.• The ammonia system just received new valves and ammoniators.• The target chloramine residual is 4.5 mg/L in the product water, 3.5 mg/L from PeaceRiver, for a combined finished water of 4 mg/L.• CCT tanks have 2 chambers and 2 mixers. After flowing through the baffles, water flowsover a weir. Facility staff try to run a 5:1 chlorine to ammonia ratio.• All chemicals are dosed based on the number of stacks running (average flow). Allchemicals are a constant feed, manually set, with no flow pacing.• Process feed pump room has new VFDs coming soon. They will also pull and replacethe wiring, as it is very corroded. The building sits in a low spot on the site and haswater problems, which is conducive for corrosion.• Facility staff plan to put the VFDs on pads and then raise the floor. They also will build abirm with a sump pump.H:\Client\SAR Co_SAR\6873C00 WATER SUPPLY MASTER PLAN UPDATE\Deliverables\TM 2 - Water System Assets\Final\Appendix B -Final.doc