Agenda - 06-12-2007-4aa - Laserfiche WebLink

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2 trees, set backs from sewer lines, buildings, etc. it proved impossible to site enough additional wells to serve the Jail. The analysis conducted by RN&M also examined the feasibility of constructing a geo-thermal system for the Jail on the open space to the south and/or north of the Historic Courthouse, but again, trees and required setbacks eliminated this option from consideration. The system with the best life cycle cost of the other three examined was determined to be a four-pipe hydronic system to include a new boiler and chiller. A copy of the "Orange County Jail HVAC System Upgrade -Life Cycle Cost Analysis" has been included as Attachment `A' 2) Chiller Replacement Due to its age and increasing unreliability, it is recommended that the existing chiller be replaced as soon as possible. With that in mind, Public Works requested that RN&M develop specifications for a recommended replacement chiller that would be compatible with the overall HVAC system replacement. Public Works and Purchasing then requested bids from four qualified HVAC contractors for the removal of the existing chiller and replacement with the model recommended by RN&M. Bids were received from four HVAC contractors, with Southern Piping, Inc. of Raleigh the low bidder at a cost of $45,929 for supply and installation of a Carrier 45 ton chiller. A summary of bids received for the supply and installation of the replacement chiller is presented as Table 1 TABLE 1 CHILLER REPLACEMENT BID TABULATIONS VENDOR LOCATION TOTAL SOUTHERN PIPING RALEIGH, NC $45,929.00 WARREN HAY HILLSBOROUGH, NC $47,300.00 CENTRAL TECHNOLOGIES MILTON, NC $47,750.00 COMFORT ENGINEERS DURHAM, NC $50,600.00 WARREN HAY ALT HILLSBOROUGH, NC $57,500.00 3) Proposals for Jail HVAC System Design & Existing Building Code Review Again, due to age and condition; as well as the round-the-clock occupancy of the Jail, Public Works recommends replacement of the entire HVAC system. RN&M have provided a proposal for performance of the HVAC system design work at a cost of $54,000. The affected sections of the Jail for the HVAC system replacement were constructed in approximately 1982. As such, building code and/or accessibility deficiencies may be identified during replacement of the HVAC system. RN&M have provided a proposal to perform a "North Carolina Building Code Chapter 34 Existing Building Code Review" to identify deficiencies that will be required to be remedied in order to proceed with the installation of a new HVAC system for the Jail. The cost for this review is $8,000. FINANCIAL IMPACT: Adequate funds for this work are available in the HVAC Replacement capital account. Table 2 summarizes available funding in the HVAC capital account, as well as known and estimated costs for each project element.