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' Sub-Total..............$1,974,263 <br />Engineer's Design Fee......... .$ 110,330 <br />TOTAL ESTIMATED COST ..................$2.0®.593 <br />Based on 375 units, cost/unit = 2,084,593/375 = $5,559.00 <br />F -J <br />C <br />B. Individual Grinder Pump/Manifolded Small Force Main Alternative <br />(See Exhibit B) <br />1. Basis of unit price estimates: <br />a. At each of 375 existing dwelling units, remove existing <br />septic tank lid; remove septic tank contents; backfill <br />with <br />septic tank; furnish and install grinder pump <br />basin; control panel, wiring/conduit, individual dwelling <br />unit 1}" diameter PVC force main. <br />Equipment $1,600.00 <br />Installation $ 600.00 <br />Total $2,200.00 <br />Recommendations and Implementation <br />The Rockridge area of Indian River County is in need of a sewage <br />collection system due to chronic malfunctioning of the existing individual <br />septic systems. The area is constructed over a shallow layer of hard <br />limestone approximately 1 to 2 feet thick. This impervious rock layer <br />is the primary reason for the septic system operational problems. <br />-10- <br />Unit Cost <br />Total Cost <br />Units <br />Description <br />375 <br />Grinder Pump Systems Complete(See la) <br />$2,200.00 <br />825,000 <br />15,845 <br />LF 2", 21" & 3" 0 PVC Force Main <br />5.00 <br />81,900 <br />7 <br />Wet tap connectiont to existing <br />100.00 <br />700 <br />6" 0 PVC Force Main <br />3 <br />Wet tap connections to existing <br />500.00 <br />1,500 <br />18" 0 concrete force main <br />909,100 <br />Sub -total ...................................$ <br />136,365 <br />15% Contingencies ...........................$ <br />Sub-total...................................$1,045,465 <br />Engineer's Design Fee .......................$ <br />62,730 <br />TOTAL ESTIMATED COST .....................$1,108,195 <br />Based <br />on 375 units, cost/unit = 1,108,195/375 = <br />$2,955.00 <br />Recommendations and Implementation <br />The Rockridge area of Indian River County is in need of a sewage <br />collection system due to chronic malfunctioning of the existing individual <br />septic systems. The area is constructed over a shallow layer of hard <br />limestone approximately 1 to 2 feet thick. This impervious rock layer <br />is the primary reason for the septic system operational problems. <br />-10- <br />