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Change Order Number 4 Summary Indian River CountyNorth County Water Treatment Plant Expansion Phase II Potential Change Order number Description Amount Explanation 44 Two raised sand filter access platforms $16 ,954 . 00 The sand filters are raised above the ground limiting access to the mechanical parts located at the top of the filter, Operator safety and accessibility for maintain the $ 185,400 piece of equipment are the primary reasons for this change. 11 45 Instrumentation Remote Input/Output Panel $46 , 275 .00 This change is to provide additional wiring , conduits , and input and output cards for the existing plant 1/0 cabinets along with Surge protection , 46 Differential Pressure Guages $30590 .00 This change upgrade the differential pressure guages to a higher quality internal parts . 49 Credit for Surplus Fuel ($25 , 000 . 00) The project specifications require the contractor to provide two full fuel tanks at the completion of the project which is not necessary since the contractor will supply the other tank of fuel. 51 Credit for not removing membranes from Skids (361363.00) IRC was planning to replace the Reverse Osmosis membranes in 1 & 2 Skids 1 & 2 . However since they are still performing well, the membranes will now be installed in skids 6 & 7. The contractor is providing a credit for the removal of the membranes that will now not be performed . This change provides the plant with the flexibility to produce water from two additional skids and reduce the overall cost o the project. 53 Handrail on Acid Containment Structure $ 11 ,380 .00 The sulfuric acid tank has a spill containment structure around the tank . IRC staff asked that a handrail be installed for fall protection . 54 Truck Loading Panel for Sodium Hypochlorite $3,900.00 This change is for additional electrical conduits to connect two truck loading panels for the liquid sodium hypochlorite tanks . This is a change required to prevent overfilling of the tanks and spilling into the containment. 56 Chlorine Piping Changes $ 11 ,200. 00 This change provides additional chemical piping to allow more precise dosing of the plant odor control equipment . This change provides greater plant operating flexibility and potential for chemical cost savings over the life of the project . Total Amount Change Order No. 4 $61 ,936.00 Original Contract Price $21 ,080,300,00 Change Order Number 1 ($ 804,632.00) Change Order Number 2 $ 2889824.00 Change Order Number 3 $ 200,527.00 Change Order Number 4 $61 ,936.00 Total Contract Price $20,826,956.00