Replacement of Station Air Conditioning Units at Seven (7) Metro-Rail Stations.

Section 01 10 00

Scope of Work

•PART 1 - GENERAL
•1.01 SUMMARY
•A. The Work includes constructing the Project as indicated in the Contract Documents.
•B. The completed Project shall result in turn-key replacement of Air Conditioning Units (ACUs), including all ductwork, piping, supports, electrical, and controls. In addition, underplatform sump pumps shall be replaced. The Project shall function as an integral part of and be fully compatible with the existing WMATA system.
•C. The Contractor shall pay for and obtain all permits and approvals from required jurisdictions prior to Work.
•D. The contractor shall submit a replacement plan to the Contracting Officer Representative (COR) for WMATA review and approval prior to Work and before affecting the existing system.
•1. Include demolition, removal, and delivery methodologies. Include removal of access hatches, equipment breakdown, confirmation of equipment through existing spaces, doors, and hatches.
•2. Include underplatform access, material removal and delivery methodologies. Include work plan for all Work to be performed within the confined space of the underplatform area. Include removal of end-of-platform ductwork, equipment breakdown and material handling methodologies, confirmation of equipment through existing spaces, openings, and manholes.
•3. Contractor is responsible for ensuring all Work can be fully removed and reinstalled within the existing facility without altering walls, floors, hatches or door openings.
•E. The Work described hereafter shall be completed at the following seven (7) metro-rail stations:
•1. A03 - Dupont Circle
•a. The Work shall include, but is not limited to, the removal, disposal, and new installation of station ACUs

•(1) ACU replacement includes all piping, valves, temperature and flow sensors, ductwork, fire dampers, duct smoke detectors, filters, control dampers, supports and hangers; electrical starters, wiring, conduit, junction boxes, pull boxes, disconnects, and all associated appurtenances

•(2) Penetration into the underplatform space shall include a new fire damper on both the supply and return ductwork, regardless of whether a fire damper currently exists. Contractor shall provide new fire dampers in all ACU ductwork replacements.

•(3) All flanged ductwork shall be bonded across the flange and grounded to prevent stray current and induced current corrosion.

•(4) Limit of Demolition and associated removal of equipment are generally shown on contract plans. Contractor shall confirm in-field limits of demolition. No items associated with the ACU replacement shall be abandoned in place.

•b. The Work shall include new controls and electrical equipment to serve the ACUs.

•(1) Work shall include the local disconnects, ACU motor controllers/starters, replacement of pneumatic controls/controllers with electronic controls, replacement of Fire and Intrusion Alarm (FIA) interface box including contactors/relays and all other associated appurtenances within the mechanical room. Panelboards, disconnects, transformers, or other electrical equipment within the mechanical room that do not serve the ACUs are outside of the Scope.

•(2) Provide new duct smoke detectors in a redundant configuration, where a single duct smoke detector is provided on both the supply and return ducts totaling two duct smoke detectors per ACU. Duct detectors shall shut down the ACU and provide a trouble signal to the FIA system. Coordinate with the Contracting Officer Representative (COR) for connection to the FIA system and for shutdown of the ACU.

•(3) Provide all equipment, controls, and components required by air conditioning manufacturers to ensure a satisfactory performance of the manufacturers' system. Equipment and components shall include, but are not limited to, electrically actuated modulating valves, control dampers, flow sensors, temperature sensors or any other required component for a fully functional system that is remotely controlled and monitored. Provide Hand-Off-Automatic auxiliary contacts for remote monitoring of system's operational status.

•(4) Provide new temperature sensors at platform and mezzanines. Temperature sensors are typically placed within one or more pylons at the platform and mezzanine levels. All existing (or missing) temperature sensors shall be replaced with electronic temperature sensors and shall include all wiring, conduit and supports, core drills, junction boxes, pull boxes, local disconnects and all other associated appurtenances from the existing location back to the ACU control panel or DTS/AEMS/RTU panel as coordinated with the COR. All existing pneumatic lines and/or electrical wires and associated conduit from the temperature sensor shall be fully demolished and capped at the pneumatic control panel. There shall be no items abandoned in place. As shown on the sequence of operations, provide a temperature sensor within both the return air duct and supply air duct for each ACU.

•(5) Provide and integrate new Modbus communication cards and controls, for remote monitoring and control of equipment. In cooperation with the COR, contractor shall provide remote monitoring of the ACU that includes all associated wiring, conduit and supports, junction boxes, pull boxes, local disconnects, and all other associated appurtenances. Modbus communication cables shall be routed to the DTS, AEMS, or RTU as required for each location. All controls, software, points list, and associated integration shall be provided for a fully operational monitoring system. In cooperation with the COR, Contractor shall field-verify location of communications equipment and the associated conduit/wire routing.

•(6) For future monitoring and controls via SCADA or Automated Energy Management Systems (AEMS), the Work shall include sensors and associated wiring to the ACU controller. The ACU controller shall make the data available to the existing DTS, AEMS, or RTU. Sensors at the ACU shall include flow sensors for monitoring chilled water flow rate; temperature sensors for monitoring entering water temperature, leaving water temperature, entering air temperature, and leaving air temperature; damper open and closed sensors; Fan status (On/Off) for each fan; fault indication; and filter differential pressure sensor (4-20ma). All controls, software, points list, and associated integration shall be provided for a fully operational monitoring system.

•c. The Work shall include the cleaning of all underplatform return air plenums and supply ductwork.

•(1) Underplatform cleaning shall include the entire underplatform return-air plenum up to and including the return air ductwork, which is replaced as stated above.

•(a) Cleaning shall include the removal of any dirt, debris, abandoned work (i.e. old pumps, hoses, buckets, etc.), and similar.

•(b) All water shall be removed from low-points as part of the cleaning process.

•(c) Coordination with electrical trades for safe power shutdown of electrical work within the plenum shall be included as part of the Work, and shall include but is not limited to, pylon lights, electrical junction boxes, convenience outlets, and any other work.

•(2) Cleaning of ductwork shall include all supply ductwork from the point of demolition down to the underplatform, along the length of the underplatform areas, to the base of each platform pylon.

•d. The Work shall include the removal, disposal, and reinstallation of underplatform sump pumps and associated discharge piping, electrical and controls, check valve, isolation valve, and supports up to the track drainage system connection at the plenum wall.

•(1) The Work shall include the removal, disposal, and reinstallation of associated electrical outlets, wiring back to the breaker panel within the associated electrical room, conduit and supports, junction boxes, pull boxes, local disconnects and all other associated appurtenances.

•(a) Contractor shall confirm breaker is available as shown on contract drawings and that other WMATA entities have not occupied the designated breaker.

•(b) Contractor shall provide new breaker that is properly sized for the load into the designated panel. No items associated with the sump pump replacement shall be abandoned in place.

•(2) Sump pump shall be connected to a new Alarm Conversion Panel(s) as shown on Drawings. The Contractor provided Alarm Conversion Panel shall be tied into the SCADA RTU within the communications room. Work includes all wiring, conduit and supports, core drills, junction boxes, pull boxes, local disconnects and all other associated appurtenances for connection to the SCADA RTU.

•(3) New sump pumps shall have oil-sensing technology and provide fault alarms to the station kiosk via Alarm Conversion Panel and the SCADA system. All controls, software, points list, and associated integration shall be provided for a fully operational monitoring system.

•e. The Work shall include any required masonry repair and/or modification of existing housekeeping pads to accommodate new mechanical equipment, ductwork penetrations, etc.
•f. The Work shall include cleaning and painting of the mechanical room floors and equipment pads with battle ship grey or equal. Paint yellow safety lines, the edges of housekeeping pads, and any other tripping hazard yellow. Dedicated floor-space for maintenance access, filter pull-space, minimum clearances for valves, electrical equipment, and similar spaces shall be demarcated on the floor with yellow border and yellow stripping fill to ensure clearance is maintained.
•g. The Contractor shall be responsible for any and all cutting and patching required to perform the Work. Cutting, core-drills, and other penetrations shall be performed only after COR inspection of the penetration location against the field-marked rebar identification (XRay, Ground Penetrating Rebar, or other). Any demolition work that leaves open penetrations or otherwise damages existing concrete or finishes shall be patched, grouted, or repaired using another approved method to match existing.
•h. Contractor shall provide on-site training for WMATA O & M staff at the project's completion, as further specified in Section 1.05, below.
•i. Contractor shall provide as-built drawings in electronic *.PDF format with a size of 11 x 17 printed at half-size of full-scale (22 x 34).
•j. Contractor shall coordinate with and provide WMATA SAFE approved roadway barriers.

•(1) During trackside operations, provide polymesh fabric mesh tight sheeted across the wayside opening and shall be at least six feet high, so workers shall not be seen by vehicle operators. The dense poly mesh (Strongman) shall be kept taut using 3/8" steel cables attached to turnbuckles anchored to walls and threaded through the poly mesh at the top, middle and bottom of the fabric span.

•k. Provide two full sets of spare filters for each ACU. Coordinate with COR for delivery and storage of spares.
•2. A05 - Cleveland Park
•a. The Work shall include, but is not limited to, the removal, disposal, and new installation of station ACUs

•(1) ACU replacement includes all piping, valves, temperature and flow sensors, ductwork, fire dampers, duct smoke detectors, filters, control dampers, supports and hangers; electrical starters, wiring, conduit, junction boxes, pull boxes, disconnects, and all associated appurtenances

•(2) Penetration into the underplatform space shall include a new fire damper on both the supply and return ductwork, regardless of whether a fire damper currently exists. Contractor shall provide new fire dampers in all ACU ductwork replacements.

•(3) All flanged ductwork shall be bonded across the flange and grounded to prevent stray current and induced current corrosion.

•(4) Limit of Demolition and associated removal of equipment are generally shown on contract plans. Contractor shall confirm in-field limits of demolition. No items associated with the ACU replacement shall be abandoned in place.

•b. The Work shall include new controls and electrical equipment to serve the ACUs.

•(1) Work shall include the local disconnects, ACU motor controllers/starters, replacement of pneumatic controls/controllers with electronic controls, replacement of Fire and Intrusion Alarm (FIA) interface box including contactors/relays and all other associated appurtenances within the mechanical room. Panelboards, disconnects, transformers, or other electrical equipment within the mechanical room that do not serve the ACUs are outside of the Scope.

•(2) Provide new duct smoke detectors in a redundant configuration, where a single duct smoke detector is provided on both the supply and return ducts totaling two duct smoke detectors per ACU. Duct detectors shall shut down the ACU and provide a trouble signal to the FIA system. Coordinate with the Contracting Officer Representative (COR) for connection to the FIA system and for shutdown of the ACU.

•(3) Provide all equipment, controls, and components required by air conditioning manufacturers to ensure a satisfactory performance of the manufacturers' system. Equipment and components shall include, but are not limited to, electrically actuated modulating valves, control dampers, flow sensors, temperature sensors or any other required component for a fully functional system that is remotely controlled and monitored. Provide Hand-Off-Automatic auxiliary contacts for remote monitoring of system's operational status.

•(4) Provide new temperature sensors at platform and mezzanines. Temperature sensors are typically placed within one or more pylons at the platform and mezzanine levels. All existing (or missing) temperature sensors shall be replaced with electronic temperature sensors and shall include all wiring, conduit and supports, core drills, junction boxes, pull boxes, local disconnects and all other associated appurtenances from the existing location back to the ACU control panel or DTS/AEMS/RTU panel as coordinated with the COR. All existing pneumatic lines and/or electrical wires and associated conduit from the temperature sensor shall be fully demolished and capped at the pneumatic control panel. There shall be no items abandoned in place. As shown on the sequence of operations, provide a temperature sensor within both the return air duct and supply air duct for each ACU.

•(5) Provide and integrate new Modbus communication cards and controls, for remote monitoring and control of equipment. In cooperation with the COR, contractor shall provide remote monitoring of the ACU that includes all associated wiring, conduit and supports, junction boxes, pull boxes, local disconnects, and all other associated appurtenances. Modbus communication cables shall be routed to the DTS, AEMS, or RTU as required for each location. All controls, software, points list, and associated integration shall be provided for a fully operational monitoring system. In cooperation with the COR, Contractor shall field-verify location of communications equipment and the associated conduit/wire routing.

•(6) For future monitoring and controls via SCADA or Automated Energy Management Systems (AEMS), the Work shall include sensors and associated wiring to the ACU controller. The ACU controller shall make the data available to the existing DTS, AEMS, or RTU. Sensors at the ACU shall include flow sensors for monitoring chilled water flow rate; temperature sensors for monitoring entering water temperature, leaving water temperature, entering air temperature, and leaving air temperature; damper open and closed sensors; Fan status (On/Off) for each fan; fault indication; and filter differential pressure sensor (4-20ma). All controls, software, points list, and associated integration shall be provided for a fully operational monitoring system.

•c. The Work shall include the replacement of underplatform ductwork including both the supply and return ducts, as shown on drawings. New underplatform ductwork shall be pre-insulated non-metallic ductwork.

•(1) The Work shall include the removal, disposal, and installation of new ductwork from the ACU down to the underplatform. New ductwork along the length of the underplatform areas to the base of each platform pylon shall be pre-insulated non-metallic duct. Limits of duct replacement are shown on drawings. Ductwork includes, but is not limited to, all duct sections, access panels, dampers, elbows, turning vanes, transitions, testing ports, sensors, supports and hangers, flexible duct connectors, and all other associated appurtenances.

•(2) All flanged ductwork shall be bonded across the flange and grounded to prevent stray current and induced current corrosion.

•d. The Work shall include the cleaning of all underplatform return air plenums and any ductwork that has been identified on the plans to remain-in-place.

•(1) Underplatform cleaning shall include the entire underplatform return-air plenum up to and including the return air ductwork, which is replaced as stated above.

•(a) Cleaning shall include the removal of any dirt, debris, abandoned work (i.e. old pumps, hoses, buckets, etc.), and similar.

•(b) All water shall be removed from low-points as part of the cleaning process.

•(c) Coordination with electrical trades for safe power shutdown of electrical work within the plenum shall be included as part of the Work, and shall include but is not limited to, pylon lights, electrical junction boxes, convenience outlets, and any other work.

•(2) Cleaning of ductwork shall include all supply ductwork from the point of demolition down to the underplatform, along the length of the underplatform areas, to the base of each platform pylon.

•e. The Work shall include the removal, disposal, and reinstallation of underplatform sump pumps and associated discharge piping, electrical and controls, check valve, isolation valve, and supports up to the track drainage system connection at the plenum wall.

•(1) The Work shall include the removal, disposal, and reinstallation of associated electrical outlets, wiring back to the breaker panel within the associated electrical room, conduit and supports, junction boxes, pull boxes, local disconnects and all other associated appurtenances.

•(a) Contractor shall confirm breaker is available as shown on contract drawings and that other WMATA entities have not occupied the designated breaker.

•(b) Contractor shall provide new breaker that is properly sized for the load into the designated panel. No items associated with the sump pump replacement shall be abandoned in place.

•(2) Sump pump shall be connected to a new Alarm Conversion Panel(s) as shown on Drawings. The Contractor provided Alarm Conversion Panel shall be tied into the SCADA RTU within the communications room. Work includes all wiring, conduit and supports, core drills, junction boxes, pull boxes, local disconnects and all other associated appurtenances for connection to the SCADA RTU.

•(3) New sump pumps shall have oil-sensing technology and provide fault alarms to the station kiosk via Alarm Conversion Panel and the SCADA system. All controls, software, points list, and associated integration shall be provided for a fully operational monitoring system.

•f. The Work shall include any required masonry repair and/or modification of existing housekeeping pads to accommodate new mechanical equipment, ductwork penetrations, etc.
•g. The Work shall include cleaning and painting of the mechanical room floors and equipment pads with battle ship grey or equal. Paint yellow safety lines, the edges of housekeeping pads, and any other tripping hazard yellow. Dedicated floor-space for maintenance access, filter pull-space, minimum clearances for valves, electrical equipment, and similar spaces shall be demarcated on the floor with yellow border and yellow stripping fill to ensure clearance is maintained.
•h. The Contractor shall be responsible for any and all cutting and patching required to perform the Work. Cutting, core-drills, and other penetrations shall be performed only after COR inspection of the penetration location against the field-marked rebar identification (XRay, Ground Penetrating Rebar, or other). Any demolition work that leaves open penetrations or otherwise damages existing concrete or finishes shall be patched, grouted, or repaired using another approved method to match existing.
•i. Contractor shall provide on-site training for WMATA O & M staff at the project's completion, as further specified in Section 1.05, below.
•j. Contractor shall provide as-built drawings in electronic *.PDF format with a size of 11 x 17 printed at half-size of full-scale (22 x 34).
•k. Contractor shall coordinate with and provide WMATA SAFE approved roadway barriers.

•(1) During trackside operations, provide polymesh fabric mesh tight sheeted across the wayside opening and shall be at least six feet high, so workers shall not be seen by vehicle operators. The dense poly mesh (Strongman) shall be kept taut using 3/8" steel cables attached to turnbuckles anchored to walls and threaded through the poly mesh at the top, middle and bottom of the fabric span.

•l. Provide two full sets of spare filters for each ACU. Coordinate with COR for delivery and storage of spares.
•3. A06 - Van Ness
•a. The Work shall include, but is not limited to, the removal, disposal, and new installation of station ACUs

•(1) ACU replacement includes all piping, valves, temperature and flow sensors, ductwork, fire dampers, duct smoke detectors, filters, control dampers, supports and hangers; electrical starters, wiring, conduit, junction boxes, pull boxes, disconnects, and all associated appurtenances

•(2) Penetration into the underplatform space shall include a new fire damper on both the supply and return ductwork, regardless of whether a fire damper currently exists. Contractor shall provide new fire dampers in all ACU ductwork replacements.

•(3) All flanged ductwork shall be bonded across the flange and grounded to prevent stray current and induced current corrosion.

•(4) Limit of Demolition and associated removal of equipment are generally shown on contract plans. Contractor shall confirm in-field limits of demolition. No items associated with the ACU replacement shall be abandoned in place.

•b. The Work shall include new controls and electrical equipment to serve the ACUs.

•(1) Work shall include the local disconnects, ACU motor controllers/starters, replacement of pneumatic controls/controllers with electronic controls, replacement of Fire and Intrusion Alarm (FIA) interface box including contactors/relays and all other associated appurtenances within the mechanical room. Panelboards, disconnects, transformers, or other electrical equipment within the mechanical room that do not serve the ACUs are outside of the Scope.

•(2) Provide new duct smoke detectors in a redundant configuration, where a single duct smoke detector is provided on both the supply and return ducts totaling two duct smoke detectors per ACU. Duct detectors shall shut down the ACU and provide a trouble signal to the FIA system. Coordinate with the Contracting Officer Representative (COR) for connection to the FIA system and for shutdown of the ACU.

•(3) Provide all equipment, controls, and components required by air conditioning manufacturers to ensure a satisfactory performance of the manufacturers' system. Equipment and components shall include, but are not limited to, electrically actuated modulating valves, control dampers, flow sensors, temperature sensors or any other required component for a fully functional system that is remotely controlled and monitored. Provide Hand-Off-Automatic auxiliary contacts for remote monitoring of system's operational status.

•(4) Provide new temperature sensors at platform and mezzanines. Temperature sensors are typically placed within one or more pylons at the platform and mezzanine levels. All existing (or missing) temperature sensors shall be replaced with electronic temperature sensors and shall include all wiring, conduit and supports, core drills, junction boxes, pull boxes, local disconnects and all other associated appurtenances from the existing location back to the ACU control panel or DTS/AEMS/RTU panel as coordinated with the COR. All existing pneumatic lines and/or electrical wires and associated conduit from the temperature sensor shall be fully demolished and capped at the pneumatic control panel. There shall be no items abandoned in place. As shown on the sequence of operations, provide a temperature sensor within both the return air duct and supply air duct for each ACU.

•(5) Provide and integrate new Modbus communication cards and controls, for remote monitoring and control of equipment. In cooperation with the COR, contractor shall provide remote monitoring of the ACU that includes all associated wiring, conduit and supports, junction boxes, pull boxes, local disconnects, and all other associated appurtenances. Modbus communication cables shall be routed to the DTS, AEMS, or RTU as required for each location. All controls, software, points list, and associated integration shall be provided for a fully operational monitoring system. In cooperation with the COR, Contractor shall field-verify location of communications equipment and the associated conduit/wire routing.

•(6) For future monitoring and controls via SCADA or Automated Energy Management Systems (AEMS), the Work shall include sensors and associated wiring to the ACU controller. The ACU controller shall make the data available to the existing DTS, AEMS, or RTU. Sensors at the ACU shall include flow sensors for monitoring chilled water flow rate; temperature sensors for monitoring entering water temperature, leaving water temperature, entering air temperature, and leaving air temperature; damper open and closed sensors; Fan status (On/Off) for each fan; fault indication; and filter differential pressure sensor (4-20ma). All controls, software, points list, and associated integration shall be provided for a fully operational monitoring system.

•c. The Work shall include the cleaning of all underplatform return air plenums and any ductwork that has been identified on the plans to remain-in-place.

•(1) Underplatform cleaning shall include the entire underplatform return-air plenum up to and including the return air ductwork, which is replaced as stated above.

•(a) Cleaning shall include the removal of any dirt, debris, abandoned work (i.e. old pumps, hoses, buckets, etc.), and similar.

•(b) All water shall be removed from low-points as part of the cleaning process.

•(c) Coordination with electrical trades for safe power shutdown of electrical work within the plenum shall be included as part of the Work, and shall include but is not limited to, pylon lights, electrical junction boxes, convenience outlets, and any other work.

•(2) Cleaning of ductwork shall include all supply ductwork from the point of demolition down to the underplatform, along the length of the underplatform areas, to the base of each platform pylon.

•d. The Work shall include the removal, disposal, and reinstallation of underplatform sump pumps and associated discharge piping, electrical and controls, check valve, isolation valve, and supports up to the track drainage system connection at the plenum wall.

•(1) The Work shall include the removal, disposal, and reinstallation of associated electrical outlets, wiring back to the breaker panel within the associated electrical room, conduit and supports, junction boxes, pull boxes, local disconnects and all other associated appurtenances.

•(a) Contractor shall confirm breaker is available as shown on contract drawings and that other WMATA entities have not occupied the designated breaker.

•(b) Contractor shall provide new breaker that is properly sized for the load into the designated panel. No items associated with the sump pump replacement shall be abandoned in place.

•(2) Sump pump shall be connected to a new Alarm Conversion Panel(s) as shown on Drawings. The Contractor provided Alarm Conversion Panel shall be tied into the SCADA RTU within the communications room. Work includes all wiring, conduit and supports, core drills, junction boxes, pull boxes, local disconnects and all other associated appurtenances for connection to the SCADA RTU.

•(3) New sump pumps shall have oil-sensing technology and provide fault alarms to the station kiosk via Alarm Conversion Panel and the SCADA system. All controls, software, points list, and associated integration shall be provided for a fully operational monitoring system.

•e. The Work shall include any required masonry repair and/or modification of existing housekeeping pads to accommodate new mechanical equipment, ductwork penetrations, etc.
•f. The Work shall include cleaning and painting of the mechanical room floors and equipment pads with battle ship grey or equal. Paint yellow safety lines, the edges of housekeeping pads, and any other tripping hazard yellow. Dedicated floor-space for maintenance access, filter pull-space, minimum clearances for valves, electrical equipment, and similar spaces shall be demarcated on the floor with yellow border and yellow stripping fill to ensure clearance is maintained.
•g. The Contractor shall be responsible for any and all cutting and patching required to perform the Work. Cutting, core-drills, and other penetrations shall be performed only after COR inspection of the penetration location against the field-marked rebar identification (XRay, Ground Penetrating Rebar, or other). Any demolition work that leaves open penetrations or otherwise damages existing concrete or finishes shall be patched, grouted, or repaired using another approved method to match existing.
•h. Contractor shall provide on-site training for WMATA O & M staff at the project's completion, as further specified in Section 1.05, below.
•i. Contractor shall provide as-built drawings in electronic *.PDF format with a size of 11 x 17 printed at half-size of full-scale (22 x 34).
•j. Contractor shall coordinate with and provide WMATA SAFE approved roadway barriers.

•(1) During trackside operations, provide polymesh fabric mesh tight sheeted across the wayside opening and shall be at least six feet high, so workers shall not be seen by vehicle operators. The dense poly mesh (Strongman) shall be kept taut using 3/8" steel cables attached to turnbuckles anchored to walls and threaded through the poly mesh at the top, middle and bottom of the fabric span.

•k. Provide two full sets of spare filters for each ACU. Coordinate with COR for delivery and storage of spares.
•4. A07 - Tenleytown
•a. The Work shall include, but is not limited to, the removal, disposal, and new installation of station ACUs

•(1) ACU replacement includes all piping, valves, temperature and flow sensors, ductwork, fire dampers, duct smoke detectors, filters, control dampers, supports and hangers; electrical starters, wiring, conduit, junction boxes, pull boxes, disconnects, and all associated appurtenances

•(2) Penetration into the underplatform space shall include a new fire damper on both the supply and return ductwork, regardless of whether a fire damper currently exists. Contractor shall provide new fire dampers in all ACU ductwork replacements.

•(3) All flanged ductwork shall be bonded across the flange and grounded to prevent stray current and induced current corrosion.

•(4) Limit of Demolition and associated removal of equipment are generally shown on contract plans. Contractor shall confirm in-field limits of demolition. No items associated with the ACU replacement shall be abandoned in place.

•b. The Work shall include new controls and electrical equipment to serve the ACUs.

•(1) Work shall include the local disconnects, ACU motor controllers/starters, replacement of pneumatic controls/controllers with electronic controls, replacement of Fire and Intrusion Alarm (FIA) interface box including contactors/relays and all other associated appurtenances within the mechanical room. Panelboards, disconnects, transformers, or other electrical equipment within the mechanical room that do not serve the ACUs are outside of the Scope.

•(2) Provide new duct smoke detectors in a redundant configuration, where a single duct smoke detector is provided on both the supply and return ducts totaling two duct smoke detectors per ACU. Duct detectors shall shut down the ACU and provide a trouble signal to the FIA system. Coordinate with the Contracting Officer Representative (COR) for connection to the FIA system and for shutdown of the ACU.

•(3) Provide all equipment, controls, and components required by air conditioning manufacturers to ensure a satisfactory performance of the manufacturers' system. Equipment and components shall include, but are not limited to, electrically actuated modulating valves, control dampers, flow sensors, temperature sensors or any other required component for a fully functional system that is remotely controlled and monitored. Provide Hand-Off-Automatic auxiliary contacts for remote monitoring of system's operational status.

•(4) Provide new temperature sensors at platform and mezzanines. Temperature sensors are typically placed within one or more pylons at the platform and mezzanine levels. All existing (or missing) temperature sensors shall be replaced with electronic temperature sensors and shall include all wiring, conduit and supports, core drills, junction boxes, pull boxes, local disconnects and all other associated appurtenances from the existing location back to the ACU control panel or DTS/AEMS/RTU panel as coordinated with the COR. All existing pneumatic lines and/or electrical wires and associated conduit from the temperature sensor shall be fully demolished and capped at the pneumatic control panel. There shall be no items abandoned in place. As shown on the sequence of operations, provide a temperature sensor within both the return air duct and supply air duct for each ACU.

•(5) Provide and integrate new Modbus communication cards and controls, for remote monitoring and control of equipment. In cooperation with the COR, contractor shall provide remote monitoring of the ACU that includes all associated wiring, conduit and supports, junction boxes, pull boxes, local disconnects, and all other associated appurtenances. Modbus communication cables shall be routed to the DTS, AEMS, or RTU as required for each location. All controls, software, points list, and associated integration shall be provided for a fully operational monitoring system. In cooperation with the COR, Contractor shall field-verify location of communications equipment and the associated conduit/wire routing.

•(6) For future monitoring and controls via SCADA or Automated Energy Management Systems (AEMS), the Work shall include sensors and associated wiring to the ACU controller. The ACU controller shall make the data available to the existing DTS, AEMS, or RTU. Sensors at the ACU shall include flow sensors for monitoring chilled water flow rate; temperature sensors for monitoring entering water temperature, leaving water temperature, entering air temperature, and leaving air temperature; damper open and closed sensors; Fan status (On/Off) for each fan; fault indication; and filter differential pressure sensor (4-20ma). All controls, software, points list, and associated integration shall be provided for a fully operational monitoring system.

•c. The Work shall include the cleaning of all underplatform return air plenums and any ductwork that has been identified on the plans to remain-in-place.

•(1) Underplatform cleaning shall include the entire underplatform return-air plenum up to and including the return air ductwork, which is replaced as stated above.

•(a) Cleaning shall include the removal of any dirt, debris, abandoned work (i.e. old pumps, hoses, buckets, etc.), and similar.

•(b) All water shall be removed from low-points as part of the cleaning process.

•(c) Coordination with electrical trades for safe power shutdown of electrical work within the plenum shall be included as part of the Work, and shall include but is not limited to, pylon lights, electrical junction boxes, convenience outlets, and any other work.

•(2) Cleaning of ductwork shall include all supply ductwork from the point of demolition down to the underplatform, along the length of the underplatform areas, to the base of each platform pylon.

•d. The Work shall include the removal, disposal, and reinstallation of underplatform sump pumps and associated discharge piping, electrical and controls, check valve, isolation valve, and supports up to the track drainage system connection at the plenum wall.

•(1) The Work shall include the removal, disposal, and reinstallation of associated electrical outlets, wiring back to the breaker panel within the associated electrical room, conduit and supports, junction boxes, pull boxes, local disconnects and all other associated appurtenances.

•(a) Contractor shall confirm breaker is available as shown on contract drawings and that other WMATA entities have not occupied the designated breaker.

•(b) Contractor shall provide new breaker that is properly sized for the load into the designated panel. No items associated with the sump pump replacement shall be abandoned in place.

•(2) Sump pump shall be connected to a new Alarm Conversion Panel(s) as shown on Drawings. The Contractor provided Alarm Conversion Panel shall be tied into the SCADA RTU within the communications room. Work includes all wiring, conduit and supports, core drills, junction boxes, pull boxes, local disconnects and all other associated appurtenances for connection to the SCADA RTU.

•(3) New sump pumps shall have oil-sensing technology and provide fault alarms to the station kiosk via Alarm Conversion Panel and the SCADA system. All controls, software, points list, and associated integration shall be provided for a fully operational monitoring system.

•e. The Work shall include any required masonry repair and/or modification of existing housekeeping pads to accommodate new mechanical equipment, ductwork penetrations, etc.
•f. The Work shall include cleaning and painting of the mechanical room floors and equipment pads with battle ship grey or equal. Paint yellow safety lines, the edges of housekeeping pads, and any other tripping hazard yellow. Dedicated floor-space for maintenance access, filter pull-space, minimum clearances for valves, electrical equipment, and similar spaces shall be demarcated on the floor with yellow border and yellow stripping fill to ensure clearance is maintained.
•g. The Contractor shall be responsible for any and all cutting and patching required to perform the Work. Cutting, core-drills, and other penetrations shall be performed only after COR inspection of the penetration location against the field-marked rebar identification (XRay, Ground Penetrating Rebar, or other). Any demolition work that leaves open penetrations or otherwise damages existing concrete or finishes shall be patched, grouted, or repaired using another approved method to match existing.
•h. Contractor shall provide on-site training for WMATA O & M staff at the project's completion, as further specified in Section 1.05, below.
•i. Contractor shall provide as-built drawings in electronic *.PDF format with a size of 11 x 17 printed at half-size of full-scale (22 x 34).
•j. Contractor shall coordinate with and provide WMATA SAFE approved roadway barriers.

•(1) During trackside operations, provide polymesh fabric mesh tight sheeted across the wayside opening and shall be at least six feet high, so workers shall not be seen by vehicle operators. The dense poly mesh (Strongman) shall be kept taut using 3/8" steel cables attached to turnbuckles anchored to walls and threaded through the poly mesh at the top, middle and bottom of the fabric span.

•k. Provide two full sets of spare filters for each ACU. Coordinate with COR for delivery and storage of spares.
•5. A08 - Friendship Heights
•a. The Work shall include, but is not limited to, the removal, disposal, and new installation of station ACUs

•(1) ACU replacement includes all piping, valves, temperature and flow sensors, ductwork, fire dampers, duct smoke detectors, filters, control dampers, supports and hangers; electrical starters, wiring, conduit, junction boxes, pull boxes, disconnects, and all associated appurtenances

•(2) Penetration into the underplatform space shall include a new fire damper on both the supply and return ductwork, regardless of whether a fire damper currently exists. Contractor shall provide new fire dampers in all ACU ductwork replacements.

•(3) All flanged ductwork shall be bonded across the flange and grounded to prevent stray current and induced current corrosion.

•(4) Limit of Demolition and associated removal of equipment are generally shown on contract plans. Contractor shall confirm in-field limits of demolition. No items associated with the ACU replacement shall be abandoned in place.

•b. The Work shall include new controls and electrical equipment to serve the ACUs.

•(1) Work shall include the local disconnects, ACU motor controllers/starters, replacement of pneumatic controls/controllers with electronic controls, replacement of Fire and Intrusion Alarm (FIA) interface box including contactors/relays and all other associated appurtenances within the mechanical room. Panelboards, disconnects, transformers, or other electrical equipment within the mechanical room that do not serve the ACUs are outside of the Scope.

•(2) Provide new duct smoke detectors in a redundant configuration, where a single duct smoke detector is provided on both the supply and return ducts totaling two duct smoke detectors per ACU. Duct detectors shall shut down the ACU and provide a trouble signal to the FIA system. Coordinate with the Contracting Officer Representative (COR) for connection to the FIA system and for shutdown of the ACU.

•(3) Provide all equipment, controls, and components required by air conditioning manufacturers to ensure a satisfactory performance of the manufacturers' system. Equipment and components shall include, but are not limited to, electrically actuated modulating valves, control dampers, flow sensors, temperature sensors or any other required component for a fully functional system that is remotely controlled and monitored. Provide Hand-Off-Automatic auxiliary contacts for remote monitoring of system's operational status.

•(4) Provide new temperature sensors at platform and mezzanines. Temperature sensors are typically placed within one or more pylons at the platform and mezzanine levels. All existing (or missing) temperature sensors shall be replaced with electronic temperature sensors and shall include all wiring, conduit and supports, core drills, junction boxes, pull boxes, local disconnects and all other associated appurtenances from the existing location back to the ACU control panel or DTS/AEMS/RTU panel as coordinated with the COR. All existing pneumatic lines and/or electrical wires and associated conduit from the temperature sensor shall be fully demolished and capped at the pneumatic control panel. There shall be no items abandoned in place. As shown on the sequence of operations, provide a temperature sensor within both the return air duct and supply air duct for each ACU.

•(5) Provide and integrate new Modbus communication cards and controls, for remote monitoring and control of equipment. In cooperation with the COR, contractor shall provide remote monitoring of the ACU that includes all associated wiring, conduit and supports, junction boxes, pull boxes, local disconnects, and all other associated appurtenances. Modbus communication cables shall be routed to the DTS, AEMS, or RTU as required for each location. All controls, software, points list, and associated integration shall be provided for a fully operational monitoring system. In cooperation with the COR, Contractor shall field-verify location of communications equipment and the associated conduit/wire routing.

•(6) For future monitoring and controls via SCADA or Automated Energy Management Systems (AEMS), the Work shall include sensors and associated wiring to the ACU controller. The ACU controller shall make the data available to the existing DTS, AEMS, or RTU. Sensors at the ACU shall include flow sensors for monitoring chilled water flow rate; temperature sensors for monitoring entering water temperature, leaving water temperature, entering air temperature, and leaving air temperature; damper open and closed sensors; Fan status (On/Off) for each fan; fault indication; and filter differential pressure sensor (4-20ma). All controls, software, points list, and associated integration shall be provided for a fully operational monitoring system.

•c. The Work shall include the cleaning of all underplatform return air plenums and any ductwork that has been identified on the plans to remain-in-place.

•(1) Underplatform cleaning shall include the entire underplatform return-air plenum up to and including the return air ductwork, which is replaced as stated above.

•(a) Cleaning shall include the removal of any dirt, debris, abandoned work (i.e. old pumps, hoses, buckets, etc.), and similar.

•(b) All water shall be removed from low-points as part of the cleaning process.

•(c) Coordination with electrical trades for safe power shutdown of electrical work within the plenum shall be included as part of the Work, and shall include but is not limited to, pylon lights, electrical junction boxes, convenience outlets, and any other work.

•(2) Cleaning of ductwork shall include all supply ductwork from the point of demolition down to the underplatform, along the length of the underplatform areas, to the base of each platform pylon.

•d. The Work shall include the removal, disposal, and reinstallation of underplatform sump pumps and associated discharge piping, electrical and controls, check valve, isolation valve, and supports up to the track drainage system connection at the plenum wall.

•(1) The Work shall include the removal, disposal, and reinstallation of associated electrical outlets, wiring back to the breaker panel within the associated electrical room, conduit and supports, junction boxes, pull boxes, local disconnects and all other associated appurtenances.

•(a) Contractor shall confirm breaker is available as shown on contract drawings and that other WMATA entities have not occupied the designated breaker.

•(b) Contractor shall provide new breaker that is properly sized for the load into the designated panel. No items associated with the sump pump replacement shall be abandoned in place.

•(2) Sump pump shall be connected to a new Alarm Conversion Panel(s) as shown on Drawings. The Contractor provided Alarm Conversion Panel shall be tied into the SCADA RTU within the communications room. Work includes all wiring, conduit and supports, core drills, junction boxes, pull boxes, local disconnects and all other associated appurtenances for connection to the SCADA RTU.

•(3) New sump pumps shall have oil-sensing technology and provide fault alarms to the station kiosk via Alarm Conversion Panel and the SCADA system. All controls, software, points list, and associated integration shall be provided for a fully operational monitoring system.

•e. The Work shall include any required masonry repair and/or modification of existing housekeeping pads to accommodate new mechanical equipment, ductwork penetrations, etc.
•f. The Work shall include cleaning and painting of the mechanical room floors and equipment pads with battle ship grey or equal. Paint yellow safety lines, the edges of housekeeping pads, and any other tripping hazard yellow. Dedicated floor-space for maintenance access, filter pull-space, minimum clearances for valves, electrical equipment, and similar spaces shall be demarcated on the floor with yellow border and yellow stripping fill to ensure clearance is maintained.
•g. The Contractor shall be responsible for any and all cutting and patching required to perform the Work. Cutting, core-drills, and other penetrations shall be performed only after COR inspection of the penetration location against the field-marked rebar identification (XRay, Ground Penetrating Rebar, or other). Any demolition work that leaves open penetrations or otherwise damages existing concrete or finishes shall be patched, grouted, or repaired using another approved method to match existing.
•h. Contractor shall provide on-site training for WMATA O & M staff at the project's completion, as further specified in Section 1.05, below.
•i. Contractor shall provide as-built drawings in electronic *.PDF format with a size of 11 x 17 printed at half-size of full-scale (22 x 34).
•j. Contractor shall coordinate with and provide WMATA SAFE approved roadway barriers.

•(1) During trackside operations, provide polymesh fabric mesh tight sheeted across the wayside opening and shall be at least six feet high, so workers shall not be seen by vehicle operators. The dense poly mesh (Strongman) shall be kept taut using 3/8" steel cables attached to turnbuckles anchored to walls and threaded through the poly mesh at the top, middle and bottom of the fabric span.

•k. Provide two full sets of spare filters for each ACU. Coordinate with COR for delivery and storage of spares.
•6. C07 - Pentagon
•a. The Work shall include, but is not limited to, the removal, disposal, and new installation of station ACUs

•(1) ACU replacement includes all piping, valves, temperature and flow sensors, ductwork, fire dampers, duct smoke detectors, filters, control dampers, supports and hangers; electrical starters, wiring, conduit, junction boxes, pull boxes, disconnects, and all associated appurtenances

•(2) Penetration into the underplatform space shall include a new fire damper on both the supply and return ductwork, regardless of whether a fire damper currently exists. Contractor shall provide new fire dampers in all ACU ductwork replacements.

•(3) All flanged ductwork shall be bonded across the flange and grounded to prevent stray current and induced current corrosion.

•(4) Limit of Demolition and associated removal of equipment are generally shown on contract plans. Contractor shall confirm in-field limits of demolition. No items associated with the ACU replacement shall be abandoned in place.

•b. The Work shall include new controls and electrical equipment to serve the ACUs.

•(1) Work shall include the local disconnects, ACU motor controllers/starters, replacement of pneumatic controls/controllers with electronic controls, replacement of Fire and Intrusion Alarm (FIA) interface box including contactors/relays and all other associated appurtenances within the mechanical room. Panelboards, disconnects, transformers, or other electrical equipment within the mechanical room that do not serve the ACUs are outside of the Scope.

•(2) Provide new duct smoke detectors in a redundant configuration, where a single duct smoke detector is provided on both the supply and return ducts totaling two duct smoke detectors per ACU. Duct detectors shall shut down the ACU and provide a trouble signal to the FIA system. Coordinate with the Contracting Officer Representative (COR) for connection to the FIA system and for shutdown of the ACU.

•(3) Provide all equipment, controls, and components required by air conditioning manufacturers to ensure a satisfactory performance of the manufacturers' system. Equipment and components shall include, but are not limited to, electrically actuated modulating valves, control dampers, flow sensors, temperature sensors or any other required component for a fully functional system that is remotely controlled and monitored. Provide Hand-Off-Automatic auxiliary contacts for remote monitoring of system's operational status.

•(4) Provide new temperature sensors at platform and mezzanines. Temperature sensors are typically placed within one or more pylons at the platform and mezzanine levels. All existing (or missing) temperature sensors shall be replaced with electronic temperature sensors and shall include all wiring, conduit and supports, core drills, junction boxes, pull boxes, local disconnects and all other associated appurtenances from the existing location back to the ACU control panel or DTS/AEMS/RTU panel as coordinated with the COR. All existing pneumatic lines and/or electrical wires and associated conduit from the temperature sensor shall be fully demolished and capped at the pneumatic control panel. There shall be no items abandoned in place. As shown on the sequence of operations, provide a temperature sensor within both the return air duct and supply air duct for each ACU.

•(5) Provide and integrate new Modbus communication cards and controls, for remote monitoring and control of equipment. In cooperation with the COR, contractor shall provide remote monitoring of the ACU that includes all associated wiring, conduit and supports, junction boxes, pull boxes, local disconnects, and all other associated appurtenances. Modbus communication cables shall be routed to the DTS, AEMS, or RTU as required for each location. All controls, software, points list, and associated integration shall be provided for a fully operational monitoring system. In cooperation with the COR, Contractor shall field-verify location of communications equipment and the associated conduit/wire routing.

•(6) For future monitoring and controls via SCADA or Automated Energy Management Systems (AEMS), the Work shall include sensors and associated wiring to the ACU controller. The ACU controller shall make the data available to the existing DTS, AEMS, or RTU. Sensors at the ACU shall include flow sensors for monitoring chilled water flow rate; temperature sensors for monitoring entering water temperature, leaving water temperature, entering air temperature, and leaving air temperature; damper open and closed sensors; Fan status (On/Off) for each fan; fault indication; and filter differential pressure sensor (4-20ma). All controls, software, points list, and associated integration shall be provided for a fully operational monitoring system.

•c. The Work shall include the cleaning of all underplatform return air plenums and any ductwork that has been identified on the plans to remain-in-place.

•(1) Underplatform cleaning shall include the entire underplatform return-air plenum up to and including the return air ductwork, which is replaced as stated above.

•(a) Cleaning shall include the removal of any dirt, debris, abandoned work (i.e. old pumps, hoses, buckets, etc.), and similar.

•(b) All water shall be removed from low-points as part of the cleaning process.

•(c) Coordination with electrical trades for safe power shutdown of electrical work within the plenum shall be included as part of the Work, and shall include but is not limited to, pylon lights, electrical junction boxes, convenience outlets, and any other work.

•(2) Cleaning of ductwork shall include all supply ductwork from the point of demolition down to the underplatform, along the length of the underplatform areas, to the base of each platform pylon.

•d. The Work shall include any required masonry repair and/or modification of existing housekeeping pads to accommodate new mechanical equipment, ductwork penetrations, etc.
•e. The Work shall include cleaning and painting of the mechanical room floors and equipment pads with battle ship grey or equal. Paint yellow safety lines, the edges of housekeeping pads, and any other tripping hazard yellow. Dedicated floor-space for maintenance access, filter pull-space, minimum clearances for valves, electrical equipment, and similar spaces shall be demarcated on the floor with yellow border and yellow stripping fill to ensure clearance is maintained.
•f. The Contractor shall be responsible for any and all cutting and patching required to perform the Work. Cutting, core-drills, and other penetrations shall be performed only after COR inspection of the penetration location against the field-marked rebar identification (XRay, Ground Penetrating Rebar, or other). Any demolition work that leaves open penetrations or otherwise damages existing concrete or finishes shall be patched, grouted, or repaired using another approved method to match existing.
•g. Contractor shall provide on-site training for WMATA O & M staff at the project's completion, as further specified in Section 1.05, below.
•h. Contractor shall provide as-built drawings in electronic *.PDF format with a size of 11 x 17 printed at half-size of full-scale (22 x 34).
•i. Contractor shall coordinate with and provide WMATA SAFE approved roadway barriers.

•(1) During trackside operations, provide polymesh fabric mesh tight sheeted across the wayside opening and shall be at least six feet high, so workers shall not be seen by vehicle operators. The dense poly mesh (Strongman) shall be kept taut using 3/8" steel cables attached to turnbuckles anchored to walls and threaded through the poly mesh at the top, middle and bottom of the fabric span.

•j. Provide two full sets of spare filters for each ACU. Coordinate with COR for delivery and storage of spares.
•7. C09 - Crystal City
•a. The Work shall include, but is not limited to, the removal, disposal, and new installation of station ACUs

•(1) ACU replacement includes all piping, valves, temperature and flow sensors, ductwork, fire dampers, duct smoke detectors, filters, control dampers, supports and hangers; electrical starters, wiring, conduit, junction boxes, pull boxes, disconnects, and all associated appurtenances

•(2) Penetration into the underplatform space shall include a new fire damper on both the supply and return ductwork, regardless of whether a fire damper currently exists. Contractor shall provide new fire dampers in all ACU ductwork replacements.

•(3) All flanged ductwork shall be bonded across the flange and grounded to prevent stray current and induced current corrosion.

•(4) Limit of Demolition and associated removal of equipment are generally shown on contract plans. Contractor shall confirm in-field limits of demolition. No items associated with the ACU replacement shall be abandoned in place.

•b. The Work shall include new controls and electrical equipment to serve the ACUs.

•(1) Work shall include the local disconnects, ACU motor controllers/starters, replacement of pneumatic controls/controllers with electronic controls, replacement of Fire and Intrusion Alarm (FIA) interface box including contactors/relays and all other associated appurtenances within the mechanical room. Panelboards, disconnects, transformers, or other electrical equipment within the mechanical room that do not serve the ACUs are outside of the Scope.

•(2) Provide new duct smoke detectors in a redundant configuration, where a single duct smoke detector is provided on both the supply and return ducts totaling two duct smoke detectors per ACU. Duct detectors shall shut down the ACU and provide a trouble signal to the FIA system. Coordinate with the Contracting Officer Representative (COR) for connection to the FIA system and for shutdown of the ACU.

•(3) Provide all equipment, controls, and components required by air conditioning manufacturers to ensure a satisfactory performance of the manufacturers' system. Equipment and components shall include, but are not limited to, electrically actuated modulating valves, control dampers, flow sensors, temperature sensors or any other required component for a fully functional system that is remotely controlled and monitored. Provide Hand-Off-Automatic auxiliary contacts for remote monitoring of system's operational status.

•(4) Provide new temperature sensors at platform and mezzanines. Temperature sensors are typically placed within one or more pylons at the platform and mezzanine levels. All existing (or missing) temperature sensors shall be replaced with electronic temperature sensors and shall include all wiring, conduit and supports, core drills, junction boxes, pull boxes, local disconnects and all other associated appurtenances from the existing location back to the ACU control panel or DTS/AEMS/RTU panel as coordinated with the COR. All existing pneumatic lines and/or electrical wires and associated conduit from the temperature sensor shall be fully demolished and capped at the pneumatic control panel. There shall be no items abandoned in place. As shown on the sequence of operations, provide a temperature sensor within both the return air duct and supply air duct for each ACU.

•(5) Provide and integrate new Modbus communication cards and controls, for remote monitoring and control of equipment. In cooperation with the COR, contractor shall provide remote monitoring of the ACU that includes all associated wiring, conduit and supports, junction boxes, pull boxes, local disconnects, and all other associated appurtenances. Modbus communication cables shall be routed to the DTS, AEMS, or RTU as required for each location. All controls, software, points list, and associated integration shall be provided for a fully operational monitoring system. In cooperation with the COR, Contractor shall field-verify location of communications equipment and the associated conduit/wire routing.

•(6) For future monitoring and controls via SCADA or Automated Energy Management Systems (AEMS), the Work shall include sensors and associated wiring to the ACU controller. The ACU controller shall make the data available to the existing DTS, AEMS, or RTU. Sensors at the ACU shall include flow sensors for monitoring chilled water flow rate; temperature sensors for monitoring entering water temperature, leaving water temperature, entering air temperature, and leaving air temperature; damper open and closed sensors; Fan status (On/Off) for each fan; fault indication; and filter differential pressure sensor (4-20ma). All controls, software, points list, and associated integration shall be provided for a fully operational monitoring system.

•c. The Work shall include the cleaning of all underplatform return air plenums and any ductwork that has been identified on the plans to remain-in-place.

•(1) Underplatform cleaning shall include the entire underplatform return-air plenum up to and including the return air ductwork, which is replaced as stated above.

•(a) Cleaning shall include the removal of any dirt, debris, abandoned work (i.e. old pumps, hoses, buckets, etc.), and similar.

•(b) All water shall be removed from low-points as part of the cleaning process.

•(c) Coordination with electrical trades for safe power shutdown of electrical work within the plenum shall be included as part of the Work, and shall include but is not limited to, pylon lights, electrical junction boxes, convenience outlets, and any other work.

•(2) Cleaning of ductwork shall include all supply ductwork from the point of demolition down to the underplatform, along the length of the underplatform areas, to the base of each platform pylon.

•d. The Work shall include any required masonry repair and/or modification of existing housekeeping pads to accommodate new mechanical equipment, ductwork penetrations, etc.
•e. The Work shall include cleaning and painting of the mechanical room floors and equipment pads with battle ship grey or equal. Paint yellow safety lines, the edges of housekeeping pads, and any other tripping hazard yellow. Dedicated floor-space for maintenance access, filter pull-space, minimum clearances for valves, electrical equipment, and similar spaces shall be demarcated on the floor with yellow border and yellow stripping fill to ensure clearance is maintained.
•f. The Contractor shall be responsible for any and all cutting and patching required to perform the Work. Cutting, core-drills, and other penetrations shall be performed only after COR inspection of the penetration location against the field-marked rebar identification (XRay, Ground Penetrating Rebar, or other). Any demolition work that leaves open penetrations or otherwise damages existing concrete or finishes shall be patched, grouted, or repaired using another approved method to match existing.
•g. Contractor shall provide on-site training for WMATA O & M staff at the project's completion, as further specified in Section 1.05, below.
•h. Contractor shall provide as-built drawings in electronic *.PDF format with a size of 11 x 17 printed at half-size of full-scale (22 x 34).
•i. Contractor shall coordinate with and provide WMATA SAFE approved roadway barriers.

•(1) During trackside operations, provide polymesh fabric mesh tight sheeted across the wayside opening and shall be at least six feet high, so workers shall not be seen by vehicle operators. The dense poly mesh (Strongman) shall be kept taut using 3/8" steel cables attached to turnbuckles anchored to walls and threaded through the poly mesh at the top, middle and bottom of the fabric span.

•j. Provide two full sets of spare filters for each ACU. Coordinate with COR for delivery and storage of spares.
•1.02 QUALITY ASSURANCE
•A. Qualifications of Manufacturer:
•1. Equipment shall have been produced by a manufacturer of established reputation with a minimum of five years experience supplying specified equipment.
•2. Minimum expected life of this equipment shall be 10 years. All equipment furnished shall be heavy duty, commercial type. Ready availability of spare and repair parts will be important criteria in evaluating manufacturer's proposals. Maintainability and ease of service are additional important evaluation criteria.
•3. The Contracting Officer Representative (COR) reserves the right to inspect materials, and their sources, workmanship, and construction methods at any time, at the Manufacturer's shop or fabricating facility. The AR further reserves the right to be present for any or all shop tests of components, assemblies, or systems. Contractor shall notify the COR two weeks in advance of any tests.
•4. The Authority shall have final approval of the equipment manufacturer.
•B. Manufacturer's Representative:
•1. Installation: Provide a qualified manufacturer's representative at site to supervise work related to equipment installation, check‑out, and start‑up operations at each location.
•C. Equipment Warranty:
•1. All major equipment shall be provided with five year warranty on entire parts and labor.
•2. All major equipment manufacturers shall have a local factory service within 100 miles of jobsite for regular maintenance.
•D. Within the five year warranty, provide yearly maintenance contracts for all major equipment and control systems. Yearly maintenance requirements shall be coordinated with the owner.
•E. Reference Codes and Specifications:
•1. Codes and regulations of the District of Columbia.
•2. Code and regulations of Maryland.
•3. Code and regulations of Virginia.
•4. Discipline specific 2015 International Code Council.
•1.03 SUBMITTALS:
•A. Submit the following for approval in accordance with Section 2, Special Conditions and with the additional requirements as specified for each:
•1. Shop Drawings and Manufacturer's Literature:
•a. Show details of construction and interfacing with other trades.
•b. Bar graph progress and delivery schedule.
•c. Provide manufacturer's product literature for all installed items.
•2. Design drawings for additional equipment-related structural work:
•a. Show details of construction and interfacing with other trades.
•3. Operation and Maintenance Manual:
•a. Provide complete parts, operating, and maintenance manual covering equipment at time of installation including, but not limited to:

•(1) Description of system and components.

•(2) Schematic diagrams of HVAC airflow, electrical, plumbing, and drainage systems.

•(3) Manufacturer's printed operating and maintenance instructions.

•(4) List of original manufacturer's parts, including suppliers' part numbers and cuts, recommended spare parts, stock quantity, and local parts and service source.

•(a) Assemble and provide four (4) copies of manual, per location, in 8‑1/2 by 11 inch format. Foldout diagrams and illustrations are acceptable.

•(b) Provide electronic files for manual using MSWord 2016 for text and Auto CAD Latest Version /Group 4 (PDF) Format for Drawings and Diagrams.

•1.04 PRODUCT DELIVERY, STORAGE, AND HANDLING:
•A. Deliver equipment in manufacturer's containers, appropriately packaged and/or crated for protection during shipment and storage.
•1.05 OPERATION AND MAINTENANCE TRAINING:
•A. Upon completion of the equipment installation and ten days before start‑up, a qualified representative of the manufacturer shall be present for a minimum of three (3), eight (8) hour working days to instruct personnel in the operation and proper care of the equipment at each location.
•1. Instructional period: Three consecutive man-days (regular working hours) minimum. A minimum of one day to be devoted to hands-on demonstration of the equipment operation, trouble analysis, repair, adjustment and maintenance.
•2. Train personnel in preventive maintenance, operation of systems and to recognize malfunctions.
•3. Provide complete printed operating instructions in manual or handbook form, completely and clearly indexed for ready reference during actual operation and for use as text during instruction of operating personnel.
•a. Include descriptions of systems, background information and complete procedures for adjustment, calibration, replacement and repair of components in the system(s).
•1.06 LABELING:
•A. Manufacturer shall securely attach in a prominent location on each major item of equipment a non‑corrosive nameplate showing manufacturer's name, address, model number, serial number, and pertinent utility or operating data.
•B. Label all added/modified piping as to its function and flow direction.
•C. Label all new/modified circuits in power panels.
•PART 2 - PRODUCTS
•2.01 Major Equipment Selection
•A. All ACUs shall be selected and installed as specified in Section 23 73 13.13.
•B. Ductwork shall be installed as specified in Section 23 31 13.
•C. All sump pumps shall be installed as specified in 22 14 29
•D. All other ancillary components for a complete functional system shall be per corresponding specifications and drawings.
•2.02 MISCELLANEOUS
•A. All demolition work shall be performed as specified in Section 02 41 19.
•B. All field painting shall be performed as specified in Section 09 91 99.
•C. All mechanical equipment and piping shall have vibration isolation as specified in Section 23 05 48.
•D. All mechanical equipment and piping shall be identified as specified in Sections 22 05 53 and 23 05 53.
•E. All equipment and piping insulation shall be selected and installed as specified in Sections 23 07 13 and 23 07 19.
•F. All systems shall be tested and balanced in accordance with Section 23 05 93.
•G. All wiring and equipment shall comply with grounding and bonding requirements as specified in Section 26 05 26.
•H. All wire and cable shall be selected, installed, and tested as specified in Section 26 05 19.
•I. All raceways, boxes and cabinets shall be selected, installed and tested as specified in Section 26 05 33.
•J. All motors shall be selected, installed and tested as specified in Section 16 05 13 except as noted above.
•K. All motor starters and control center components shall be installed and tested as specified in Section 26 24 19.
•L. All circuit breakers, panel boards, and load centers shall be selected, installed and tested as specified in Section 26 24 19.
•PART 3 - EXECUTION
•3.01 SITE PREPARATION
•A. Provide scoping and design documentation (drawings) for construction of required equipment supports and other mounts not originally specified in this document.
•B. Coordinate the installation of equipment supports with the demolition and reconstruction work of the HVAC, plumbing, and electrical contractors.
•3.02 INSPECTION
•A. Check location of rough‑in work and utility stub‑outs to assure a match with the equipment to be installed.
•B. Inspect delivered equipment for damage from shipping and exposure to weather. Compare delivered equipment with packing lists and specifications to assure receipt of all items.
•C. Report in writing to the COR any damaged, missing or incomplete scheduled equipment and improper rough‑in work or utility stub‑outs.
•3.03 INSTALLATION
•A. The Contractor shall be responsible for complete operational equipment installation.
•B. Work shall be performed under the direct supervision of Construction Superintendent. He shall coordinate the installation of scheduled equipment with the COR.
•C. Install equipment in accordance with plans, shop drawings and manufacturer's instructions:
•1. Positioning: Place equipment in accordance with any noted special positioning requirements generally level (or slight slope as required by instructions), plumb and at right angles to adjacent work.
•2. Fitting: Where field cutting or trimming is necessary, perform in a neat, accurate, professional manner without damaging equipment or adjacent work.
•3. Anchorage: Use fastenings as specified herein. Attach equipment securely to prevent damage resulting from inadequate fastenings. Installation fasteners shall be installed to avoid scratching or damaging adjacent surfaces.
•4. Upon completion of work, finish surfaces shall be free of tool marks, scratches, blemishes, and stains.
•3.04 TESTING
•A. Specification Compliance: After final connections are made and prior to authorizing payment, specified equipment and systems shall be satisfactorily tested for compliance with all specified features.
•B. Malfunctions during testing shall be corrected within five days and retested. Malfunctions during second testing shall be corrected within five days and retested.
•C. Inadequate Performance: If equipment fails the third test, the Authority may elect to have all equipment installed by this contract removed from site at no cost or obligation to the Authority.
•3.05 CLEANUP
•A. Touch‑up damage to painted finishes.
•B. Wipe and clean equipment of any oil, grease, and solvents, and make ready for use.
•C. Clean area around equipment installation and remove packing or installation debris from job site.
•D. Notify COR for scheduling of acceptance inspections.
•3.06 WARRANTY
•A. In addition to the requirements of the General Provisions, the equipment shall be guaranteed against defective parts and faulty workmanship for a period of two (2) years after substantial completion inspection (SCI). This requirement is for all new equipment installation excluding all ACUs.
•1. ACU: Provide five (5) year parts and labor warranty and routine service requirement for the new ACUs during the warranty period.
•3.07 PERSONNEL
•A. The Contractor will perform all services using factory-trained technicians who have required Federal and jurisdictional certifications and specialize in HVAC, plumbing and electronic system maintenance and repair service. All warranty, startup, maintenance, repair and service work on ACUs shall be performed by direct factory own local service station with technicians employed directly by the manufacturer. The use of factory trained technicians employed by contractors, manufacturers' representatives, distributors etc. is not acceptable. Manufacturer's company owned service station must be located within 100 miles of the project location. Use of third-party service organizations is not acceptable.
•3.08 REPAIR SERVICE
•A. The Contractor will perform all services during its regular working hours unless otherwise specified. Any services requested or agreed to by the Authority that are outside the Scope of Work will be performed by the Contractor as a contract modification.
•3.09 REPORTS
•A. The Contractor will provide the COR with a detailed report of the services performed on each inspection. Report shall be submitted to COR, shall include equipment log readings taken during inspection, condition of equipment, recommended repairs and/or services performed.

END OF SECTION

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