SECURE HVAC. DEDICATED HVAC FOR LOBBIES, MAILROOMS, AND LOADING DOCKS (NOV 2005) To prevent widespread dispersion of a contaminant released within lobbies, mailrooms, and loading docks, the associated HVAC systems shall be isolated and the areas maintained by a dedicated exhaust system at a negative pressure relative to the rest of the building, but at a positive pressure relative to the outdoors. Physical isolation of these areas (well-sealed floor to roof-deck walls, sealed wall penetrations) is critical to maintaining the pressure differential and requires special attention to ensure airtight boundaries between these areas and adjacent spaces. A qualified HVAC professional can assist in determining if the recommended isolation is feasible for a given building. A modification to an existing system will likely require a re-evaluation of the existing HVAC system as well as potentially involving architectural and/or structural changes to the building. Any re-engineering of HVAC systems shall be estimated and costs identified to the RECO before beginning any proposed alterations. In addition, lobbies, mailrooms, and loading docks shall not share a return-air system. The Lessor shall provide lobby, mailroom, and loading dock ventilation systems' outside air intakes and exhausts with low leakage, fast acting, isolation dampers that can be closed to isolate their systems. Dedicated HVAC will be required for mailrooms only when the Government specifically requires a centrally operated mailroom. Non-Government building tenants may share the mailroom. Where possible, the mailroom shall be adjacent to the loading dock to prevent the possible contamination of additional areas within the building. Any mailroom or area where mail is received and sorted shall have posted the telephone numbers of the Lessor/Owner’s building manager/engineer and local emergency personnel for emergency notification. Mailrooms shall also have a copy of the general precautions for mail handling posted. SECTION 4 DESIGN, CONSTRUCTION, AND POST AWARD ACTIVITIES
SECURE HVAC. AIRBORNE HAZARDS (NOV 2005) Air-handling units shall be able to be shut down in response to a threat. Procedures shall be in place for notification of the Lessor’s building engineer or manager, building security guard desk, local emergency personnel, DOE personnel, and RECO for possible shut-down of the air handling units serving the mailroom and/or any other possibly affected areas of the building to minimize contamination, as deemed appropriate to the hazard.
SECURE HVAC. SECURE RETURN-AIR GRILLES (NOV 2005) The Lessor shall secure return-air grilles in public lobbies and 2nd floor Secure Room. Protection measures shall not adversely affect performance of the building’s HVAC system. Return air-grille protective measures include (1) relocating return-air grilles to inaccessible, yet observable locations;
SECURE HVAC. OUTDOOR AIR INTAKES (NOV 2005) The outdoor air intakes shall be located on a secure roof or high sidewall and not within 30 feet of the loading dock; otherwise, the Lessor shall relocate, extend, or secure intakes as described below:
