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Attachment #1 Work Order # 14 South RO Water Treatment Plant Upgrades and Modifications to Restore Capacity PROJECT DESCRIPTION AND HISTORY The existing Oslo Road South Reverse Osmosis (RO) water treatment plant is more than 20 years old and with this age, improvements and replacement of some key components are necessary to maintain treatment capacity of the plant and bring the facility up to current standards . Currently, the facility' s rated capacity is listed as 8 .57 million gallons per day (mgd), however, membrane system performance, high service pumping capacity, and wellfield pumping capacity are limiting the facility' s ability to meet this capacity. This 8 .57 mgd rated capacity consists of 6 .0 mgd in RO production and 2.57 mgd of raw water blended with the RO produced water. The RO treatment system operates at 80% recovery which means the 6 .0 mgd of RO production requires 7.5 mgd of raw water. When combined with the 2. 57 mgd of blend water, the total raw water requirement is 10.07 mgd. Additionally, some of the components may not be utilized to their full useful operating capacity which limits the overall treatment plant capacity. The following Scope of Services describes the major improvements which will not only restore the facility to its rated capacity, but allow for operation at a greater capacity than what the facility is currently rated for. An evaluation of the existing South RO Plant operations and treatment capacity was conducted by Kimley-Horn and Associates, Inc. in August 2005 (see attached Table 1 ) which outlined several areas for improvement. These major areas for improvements are summarized in the following table. Com op nent Current Ca aci Required Ca aci Deficiency Supply Wells 8 .93 mgd (largest O/S) 10.03 mgd (largest O/S) 1 . 1 mgd Membrane System 5 .4 mgd (elevate pressure) 6 .0 mgd (reduce pressure) 0 .6 mgd High Service Pumps 6 .9 mgd (largest O/S) 8 .57 mgd (largest O/S) 1 . 67 mgd This Scope of Services will address the Membrane System and High Service Pump deficiencies. Although the supply well deficiency is believed to be addressed by others through modification of the existing Consumptive Use Permit, pumping capacity from the wellfield may still be insufficient to support the treatment capacity of 8 . 57 mgd MDF . All three areas of improvements are listed as necessary improvements in the Master Plan Update, dated December 2004, prepared by PBS&J. PROJECT APPROACH The following Project Approach addresses modifications to the existing membrane treatment system, membrane replacement, upgrading membrane booster pump capacity, and replacing the existing high service pumps, motors, and starters with larger capacity pumps and new variable frequency drives (VFD). In general, the limiting component in overall plant capacity is the high service pump system which is unable to pump plant production capacity of 8 .57 mgd to the customers with the largest pump out of service (O/S) as required by FDEP regulations. The next component that limits capacity is the membrane treatment trains and their inability to provide the C:\MDM Files\South RO Plant Upgrades to RestoreCapacity-reAdoc Page I