2019-245-E AMS - Sasser Companies Annex remediation

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DocuSign Envelope ID:57A4862B-43BE-4A6C-B2D2-A722FA813067 ORANGE COUNTY NORTH CAROLINA Asset Management Services Date: March 27, 2019 Project: Board of Elections Water Mitigation Background: In August, 2018 Sasser Companies was awarded a contract for the remediation and HVAC relocation at the Government Services Annex Building (Board of Elections). The HVAC relocation appropriated in the FY2017-18 CIP, the remediation of the building became necessary due to the extremely wet/humid weather and multiple flooding events, and therefore mold began to grow within the building and within the HVAC system, once a portion of the occupied space was cleaned the mold returned within other areas and therefore became emergent to clean the entire building for a full remediation. The additional scope of work to complete the interior water mitigation includes the following: 1. This scope includes additional funding to cover the costs to meet a tight construction schedule for the HVAC installation. 2. In order to move the Board of Elections staff in on schedule temporary air conditioning units were required for staff to start the work to prepare for the election. 3. Electrical work required to connect the new HVAC units, reconnect all lighting fixtures after remediation, and removing all unused power in the attic during deconstruction. 4. A portion of the work included installing individual hot water heaters for the sinks, the electrical contract to purchase the hot water heaters did not include the plumbing connections, and the HVAC relocation contract did not include any plumbing, therefore these plumbing costs are to connect the plumbing for these hot water heaters. This change also includes cleaning the basement floor drains to ensure flood waters are able to drain out quickly if flooding occurs. 5. When this project was designed in 2017 the design was not to change the HVAC system due to humidity or environmental concerns. The system was design to replace the existing system. However, due to the humidity and environmental concerns that arose prior to construction additional humidity controls and a duct heater are to be installed to ensure humidity is monitored and controlled going forward, including CO2 sensors and remote monitoring. 6. The water intrusion into the basement is still occurring and causing concerns within the first floor of the building, based on the recommendations of the investigative engineer the emergent need is for a temporary vapor barrier and dehumidifiers to be installed within the basement above the flood plain. There will be four dehumidifiers installed per this change. The dehumidifiers will be permanent to the building. The vapor barrier is only a temporary solution until the flood prone area of the basement can be filled in, and the ground water can be diverted away from the building. 7. Due to the basement and 1"floor having stairwell access this allows for contaminated air to enter into the 1"floor ceiling and storage room. The stairwell shall be removed, and a floor installed to create a telephone room. This will block the air from the basement from entering into the 1 St floor. P.O. Box 8181 * 131 West Margaret Lane,3rd Floor* Hillsborough, North Carolina 27278 Telephone:919 245-2625 Fax:919-644-3001 E-mail:AMService@orangecountync.gov