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BOOK i i I moE 730 PERMIT AND INTERLOCAL AGREEMENT (No. LRC. - 5) IS ON FILE IN THE OFFICE OF THE CLERK TO THE BOARD 11.C.2. HEALTH DEPARTMENT BUILDING - INDOOR AIR QUALITY IMPROVEMENTS - SPILLIS CANDELA PARTNERS The Board reviewed a Memorandum of December 15, 1999: Date: _December 15, 1999 To: The Honorable Board of County Commissioners Thru: James E. Chandler, County Administrator From: Thomas W. Frame, General Services Director I ------- Subject: Remedial Indoor Air Quality Improvement to Health Department Building BACKGROUND: This past summer, in response to complaints that were filed with the Florida Department of Labor, a series of inspections were carried out by the agency. The results of that inspection found some areas with higher levels of carbon dioxide than other areas. The general temperature and humidity of the first floor areas where the reading were taken were higher than areas tested on the second floor. Other noted issues were odors. It was determined that the first floor appeared to be operating under a negative air pressure that would tend to promote more humid and untreated air to be introduced into the first floor area. The Department of Labor made several suggestions to resolve some of the identified problems. One specific recommendation dealing with the largest problem (negative air pressure & higher CO2 levels) was to hire a mechanical engineer to evaluate the HAVC (Heating Ventilation Air Conditioning) system. In attempting to expedite the responsiveness to the recommendations, contact was made with the mechanical engineers on staff with Spillis Candela. This was done since the firm had already been reviewed through the Consultants Competitive Negotiations Act. Secondly, the cost of this review was also below the standard minimum required by statute. At same time we also utilized a firm, Pure Air Control Services, Inc., to make an indoor air quality diagnosis based on complaints received. ANALYSIS: The result of the mechanical engineer's review found high humidity and negative air pressure. The engineer recommends the preconditioning of outside air with the insertion of this additional air via an additional air conditioning unit that will only treat fresh outside air to be pumped into the first floor area. The finding of Pure Air Control Systems, Inc. identified areas of existing ducts and air handlers that need remedial cleaning. Reading and measurements indicate higher than normal levels of mold and fungi. This can be corrected by the work being proposed for the infusion of pre- treated outside air and cleaning and treatment of the affected equipment and ducts. _ December 21, 1999 54 0 41