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Metropolitan Wastewater Management Commission Capital Improvement Program <br />Sludge Blanket Level System <br /> – These are elements and transmitters in the secondary clarifiers to <br />measure the sludge blanket levels and communicate data to the distributed control system (DCS) at the <br />operations console. Purchased and replaced as a package for all 10 clarifiers, the current electronics were <br />installed in 2006 and are due for replacement. <br />Lower Explosive Limit (LEL) Detection System <br /> – Due to construction of Digester #4, replacement of <br />the boiler, and reconstruction of the boiler piping system, the current LEL detection system needs <br />upgrading with newer compatible technology and expanded to cover a larger area. <br />Major Rehabilitation Program - Budget <br />The FY 19-20 Capital Programs budget includes $520,000 for Major Rehabilitation projects that are <br />identified on the table below. <br />Major Rehabilitation <br />FY 19-20 <br /> Project DescriptionBudget <br /> Dome Interior Coating Repair - Digester #2$150,000 <br /> Dredge Rebuild - BMF 120,000 <br /> Collector Mechanism, Clarifier Rake Arms Recoating - Secondary 80,000 <br /> Yokogawa Vnet DCS Migration - Operations 60,000 <br /> Operations/Maintenance Building Improvements - Plant 50,000 <br /> Roof Replacement - Gravity Belt Thickener Building 45,000 <br /> Roof Replacement - MWMC Modular Building, Plant 15,000 <br /> Total$520,000 <br />Dome Interior Coating Repair, Digester #2 <br /> – When evaluated at last cleaning, the interior coating on <br />the dome of Digester #2 showed evidence of delaminating. <br />Dredge Rebuild, BMF <br /> – The dredge used in the lagoons at BMF is rebuilt every 10 years and is on <br />schedule for overhaul in FY 19-20. <br />Secondary Clarifier Rake Arms Recoating <br /> – There are ten secondary clarifiers and two of the clarifier <br />rake arms are scheduled for recoating each year to remove corrosion and prolong equipment life. <br />Yokogawa Vnet DCS Migration <br /> – The Yokogawa software used at the DCS Operations Console was <br />installed in 1995 as a loop (“chain”) network with all connected computer systems in sequence. Vnet <br />(“mesh”) virtual network architecture is much more stable and secure but requires the re-installation of all <br />communication cables among all computer systems integrated into the DCS at the WPCF. <br />Operations/Maintenance Building Improvements <br /> – This expenditure will go towards miscellaneous <br />improvements, repairs, and renovations to prolong the life and improve functionality of existing MWMC <br />buildings. <br />Roof Replacement, GBT Building <br /> – The gravity belt thickener (GBT) building is a standalone facility at <br />the WPCF with its own roof, constructed in 1993, which has reached the end of its useful life. <br />Roof Replacement, MWMC Modular <br /> – The modular building at the WPCF used by MWMC staff was <br />constructed with a 20-year shingled roof, which is now in need of replacement. <br />Page 42 FY 19-20 BUDGET AND CIP <br /> <br />- ¸ ΐΒǾ ΑΏΐΘǾ 7®±ª 3¤²²¨®­ ȟ )³¤¬ Β# <br /> <br />