07/06/2005 Council Packet - Laserfiche WebLink

Home Search

WS -3 WORK SESSION MEMORANDUM To: Mayor Bergeson and City Council Members From: Rick DeGardner, Public Services Director Meeting Date: July 6, 2005 Re: Civic Complex Energy Assessment In 2003, The Institute of Environmental Assessment (IEA) was contacted to conduct an engineering investigation of the heating, ventilation, and air conditioning (HVAC) system as well as the building envelope due to substantial mold growth identified within the HVAC supply ducts and in a wall of Room 5 in the ECFE building. The intent of the investigation was to determine the likely cause of the mold growth within the supply duct system so as to prevent or minimize future mold growth. The purpose of the building envelope evaluation was to determine if construction deficiencies existed within the wall system throughout the civic complex. The findings of the building envelope evaluation using thermal imaging suggested that the areas of the wall system had potential deficiencies. IEA recommended that further evaluation of the exterior wall systems be done to verify anomalies during the thermal imaging evaluation. To resolve these issues, necessary tasks were divided into four categories; Remove the existing mold, improve mechanical systems, improve monitoring of the entire mechanical system, and improve building envelope. Remove Existing Mold - DCI, Inc. was retained to clean and sanitize the entire air conveyance systems including the air handling units, ductwork, mechanical components and diffusers. Improve Mechanical Systems - Several upgrades were made to the mechanical system including carbon monoxide sensors, return air humidity sensors, centralized electronic monitoring system, and a programming control override to help dehumidify air brought from the outside. Improve Monitoring of the Entire Mechanical System - Staff has developed an extensive maintenance program for all mechanical systems within the civic complex including regular maintenance inspections and a replacement schedule for all components including belts, filters, etc. 7/1/2005 J:\Ricks Folder\Public Works \Govemment Bldgs \Council work session 7 -6 -05 insulation request.doc