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CHANGE ORDER NO. ONE TO CONTRACT NO. K-1011-42: BY AND BETWEEN THE NORMAN UTILITIES AUTHORITY AND OIL CAPITAL ELECTRIC, L.L.C. DECREASING THE CONTRACT AMOUNT BY $91,259.51 FOR A REVISED CONTRACT AMOUNT OF $2,213,740.49 AND EXTENDING THE CONTRACT BY 189 CALENDAR DAYS FOR THE WASTEWATER TREATMENT PLANT ENERGY IMPROVEMENTS PROJECT AND FINAL ACCEPTANCE OF THE PROJECT.
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BACKGROUND: Prior to this project the Waste Water Treatment Plant (WWTP) had four (4) 350 HP blowers supplying air to our aeration basins. The blower motors ran at 100% speed with an automatic valve on the discharge piping to control how much air was delivered to the basins. By installing variable frequency drive (VFD) motor controls, motor speed may now be modulated for the amount of air needed, thus reducing the power demand and cost to supply the required amount of air. Also, the former north digester sludge boilers installed in 1963 had out lived their useful life. The new boiler units both enhanced efficiency and upgraded performance to 450,000 Btu/hour, based on 150 gallons per minute of sludge circulation. The completed project reduces power consumption by about 1,717,000 KWH, saving approximately $103,000 annually.
On June 23, 2009, staff submitted an application for an Energy Efficiency and Conservation Block Grant (EECBG) administered by the U.S. Department of Energy (DOE) to fund both of the preceding components of the project from stimulus funds. On August 6, 2009, staff was notified of award of the grant in the amount of $1,001,400. Grant funds were received on a reimbursement basis upon payment of approved invoices. All grant funds were expended and reimbursed. The grant is closed.
The third component of this project is Supervisory Control and Data Acquisition (SCADA), which assists the operator by electronically monitoring various plant treatment and lift station activities and reporting current status to a central location. The former SCADA system at the Water ...
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