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November 2013 MM #1351 SANITARY SEWER FEASIBILITY STUDY & REPORT NORTH SEBASTIAN AREA • the proposed low pressure 2 -inch and 3 -inch force main systems are shown in blue and orange, respectively. As can be seen from Exhibit 6, almost all of the low pressure force main system is 2 - inch in size with a small length of 3 -inch force main shown on 142nd Street in Ercildoune Heights. High groundwater conditions are not a major concern in Study Area #2. However, the relative shallow depth of the low pressure force main system and resultant reduction in construction cost and reduction in damage to existing improvements are considerations when compared with a conventional gravity sewer system. Construction Cost Estimate Masteller & Moler, Inc. has utilized the exhibits and information provided by ABS Grinder Pump Station Systems and performed a takeoff of all construction items necessary to construct the proposed low pressure system with individual packaged grinder pump stations and the STEP system pump stations to serve existing residential units with septic tanks. It is assumed that vacant residential lots will use grinder stations when they are developed. The resulting construction quantities were multiplied by unit prices in order to establish the estimated project cost. The unit prices were provided by an experience utility contractor named Jobear / Warden Construction of Palm Bay, FL. This contractor has constructed numerous centralized sewer projects in Indian River County and is familiar with the study area site conditions. The estimated project cost is presented in a tabular form and shown on the next page included in this section of the report. The total estimated project cost for the low pressure sewer alternative system to serve Study Areas #1 and #2 is as follows: Grinder Pump Station: STEP System. $ 8,600,000.00 $ 7,100,000.00 17 •