SOW PJMS 172010 Add fume exhaust to NDI Lab in bldg 2050.pdf

REPAIR ROOF, FUME EXHAUST AND MAKE UP AIR UNIT

NONDESTRUCTIVE INVESTIGATION (NDI) LAB FACILITY 2050

STATEMENT OF WORK

PROJECT NUMBER: PJMS 172010

Base Engineer: 175 CES/CC

Using Agency: 175 CES/CEX

Fire Chief: 175 CES/CEF

Security Forces: 175 SFS/CC

Environmental: 175 WG/EMO

Safety: 175 WG/SE

MARYLAND AIR NATIONAL GUARD

WARFIELD AIR NATIONAL GUARD BASE

MARTIN STATE AIRPORT

BALTIMORE, MARYLAND

21 SEP 2020

1. General Project Information:

Project Location and Background: The Non Destructive Investigation (NDI) Lab in building 2050 at Martin State Airport, Maryland Air National Guard, Baltimore, MD

21220. This facility was built in 1981 and has been modernized through the past years.

The existing roof is approximately 18 years old and requires replacing. The existing

HVAC System requires upgrade.

1.1. Site Description: The MARYLAND AIR NATIONAL GUARD, WARFIELD AIR

NATIONAL GUARD BASE has a workforce of over seventeen hundred full and part-time personnel, with facilities occupying one hundred and seventy five acres of property.

The primary mission is to provide security to the nation and the state of Maryland. These facilities require security protection at all times.

1.3.1. Coordinate access to premises with Contracting Office Representative (COR) at (410)

918-6537 for execution of work. Emergency situations, military operations, or other contingencies, may cause suspension of work or restrictions on access to the construction site. If military emergency operations require escorts, the Government will provide them to the Contractor at no cost.

1.4. Use of Premises:

1.4.1. Contractor shall assume full responsibility for protection and security of materials and equipment stored on site.

1.4.2. Contractor shall move any stored products, under their control, which interfere with operations of the Government.

1.4.3. The Contracting Officer Representative (COR) will determine the storage or work areas available under this contract.

1.5. Government Equipment: Contractor use of Government owned or leased equipment such as: hoists, forklifts, compressors, welding machines, cutting rigs, etc. shall not be permitted on either a reimbursable or non-reimbursable basis. Cost for all equipment required to accomplish the work shall be included in the Contractors final bid price.

1.6. Permits and Inspections:

1.7. Normally no permits or inspections by local building officials are required. All inspections will be performed by COR unless modified by the Statement of Work. All testing will be performed by the contractor unless modified within the construction documents. A submission of the air balancing report shall be submitted to the

Commander of the 175th Civil Engineering Squadron before final payment will be delivered.

1.8. Contractor Passes: Contractor’s Passes are only issued to personnel who have properly submitted a locally generated WF 113 Wing Installation Access Application (available from the Contracting Office or from the COR) and have been cleared through an approved background investigation by the 175th Security Forces Squadron. The

Installation Access Application contains required information necessary to conduct a

National Criminal Information Center (NCIC) background check or a Defense Biometric

Identification System (DBIDS) check.

Contractors who will be working on the installation need to complete an Antiterrorism

Level I training. The training can be found at http://jko.jten.mil/courses/atl1/launch.html.

Please ensure contractors are attaching their certificates along with their applications.

Contractors who have not completed an Antiterrorism Level I training will not be allowed on the installation.

Contractor Passes are only issued to contractors who will be required to work more than

14-days on the installation in performance of their contract. For contractors requiring less than 14 days of access, an AF FM 75, Visitors Pass, will be issued upon a favorable background investigation.

The Defense Forces Commander (DFC) maintains the right to deny contractors access to the installation based on unfavorable information obtained through NCIC or DBIDS.

1.9. Unless otherwise specified in other sections of this specification, the use of burning equipment or open flame welding and cutting shall be allowed only as authorized in writing by the local Fire Inspector (Facility 3150). Once approved by the Fire Inspector, a written AF Form 592 – USAF Welding, Cutting, and Brazing Permit will be issued.

The permit will be issued by the fire department within one (1) hour of request, and must be renewed daily.

1.10. Digging permits are obtained from the Work Control Office (Facility 2100) at (410) 918-

6300. The Contractor is responsible for contacting ‘Miss Utility’ to mark the gas and electrical lines. The Contractor is responsible for hiring a private underground utility locating company to mark the water, sanitary sewer, storm sewer, broadband cable, and communication lines.

1.11. Change Orders: Only the Base Civil Engineer (BCE) or the Contractor may initiate change order requests. Do not proceed with any work until a signed modification or other written authority is received from the Contracting Officer. Only the Contracting

Officer may approve a change order.

1.12. Field Changes: No changes in the cost or the scope of the project may be made without processing a change order. Field changes not involving cost or scope may be initiated by the BCE, COR, Contracting Officer or the Contractor.

1.13. Daily Report and Sign-In Register: Each day the Contractor is on site to perform any work, the Superintendent/Foreman shall sign in at the Base Engineering Building (BLD

2100), indicating specific Building/Location and the number of person who shall be performing work that day.

1.14. Hours of Operations: The hours of operations at Martin State Airport for the Air

National Guard are 10 hours per day (0630 – 1700) Tuesday – Friday and two weekends per month (0730 – 1700). Coordinate access to premises with COR, for execution of work. Emergency situations, military operations, or other contingencies, may cause suspension of work or restrictions on access to the construction site.

1.15. Off-Hours Work: Except as otherwise specified, all work shall be performed during regular work hours (indicated above). If the Contractor desires or is required to work on

Saturdays, Sundays, Holidays or other hours outside normal work schedule, the http://jko.jten.mil/courses/atl1/launch.html

Contractor shall be required to seek written approval from the BCE. The Contractor is not entitled to premium time if the request is approved.

1.16. Clean up: The work site is an active civilian and military airport. Site cleanliness, Foreign Object Debris (FOD) control is absolute. The Contractor will clean up all construction debris and refuse and will remove it from the work site and the Base daily at their own expense.

1.17. Safety: The Contractor is responsible for performing all work In Accordance With (IAW)

State and Federal OSHA requirements as well as compliance with the most current USACE

EM 385-1

1.18. Environmental Protection and Waste Disposal: The disposal of all materials, which may include hazardous or toxic liquids that are used to perform the work, shall conform to all

Federal, State, and Local environmental regulations. All dumpster service and waste management shall be provided at no additional cost to the Government. All recyclable metal shall be placed into Martin State Airport scrap metal recycling containers. Please contact the Base Environmental Engineer Maj DeJaun Saunders at (410) 918-6538 for detailed information. Also for more information, review “Environmental Protection Plan for Contractors”, which will be provided during the solicitation phase.

1.19. Drawings: Drawings furnished by the government to the Contractor may be used for design intent but should be field verified for final pricing/estimates. The contractor is responsible for installing a complete and operable system that meets the design intent.

Review of plans is required to verify intended material quantities and type. Drawings included and to be reviewed prior to bidding are A201, A202, E201, M201, M202, M301, and P201,

1.20. Military Real Property Data – DD Form 1354: The Contractor shall furnish real property data to the Government via the DD Form 1354, Building Information Checklist for the

Transfer and Acceptance of Military Real Property, for each new construction and/or renovation project awarded, unless otherwise notified. The cost and unit of measure of each individual asset must be identified separately. If demolition work is within the scope of the project, demolished assets and demolition costs must also be identified. The

Contractor is responsible for accuracy of data, current up to the time of completion. The

Contractor should contact the Real Property Office at 410-918-6222 with questions pertaining to the DD Form 1354. For construction data assistance, Contractor may contact the 175th Base Civil Engineer’s Office to speak with the COR, or Project Manager assigned to the project.

1.21. Hazardous Materials: If suspected hazardous materials are discovered (other than dip tank solvents already included within the scope of work), do not disturb, contact the

COTR.

2. Specific Project Information:

2.1. Codes: National Fire Protection Association, national building code adopted by the local jurisdiction for wind, snow and seismic loads, Underwriters Laboratories and Factory

Mutual

2.2. References: Factory Mutual Standard 4470 - Approval Standard for Class 1 Roof Covers, Underwriters Laboratories (UL) - Roofing Systems and Materials Guide (TGFU R1306), American Society for Testing and Materials (ASTM) - Annual Book of ASTM

Standards, Architectural Sheet Metal Manual, American Society of Civil Engineers

(ASCE)

2.3. Standards: - ASCE 7 - Minimum Design Loads for Buildings and Other Structures, UL

790 Class A for fire resistance, UL 580 Class 90 for wind uplift resistance, ASTM D

6162, ASTM D 6163 or ASTM D 6164 for Roof Covering materials.

2.4. Site Visit. A site visit is required prior to providing a proposal.

2.5. Cost Proposal. Provide a detailed cost proposal indicating costs and breakdown for:

2.5.1. Installed roof system, complete. As a minimum, include lines for; demolition and disposal of existing materials, installation of the backing system and insulation, installation of the membrane, installation of auxiliary materials (Flashing, drains, downspouts, adhesives, caulking, etc.) sealing of existing area walls and roof gaps, sealing of doors.

2.5.2. Mechanical equipment, ductwork, natural gas piping, controls, custom fume hood enclosure, labor, and demolition.

2.5.3. Electrical panel removal and replacement costs, disconnection of power to existing equipment, reconnection of existing circuits, new circuits to new identified work, labor, and demolition.

2.5.4. Relocation of eye was station, new water line to humidifier, modification and connection to existing sanitary and vent systems.

2.5.5. Additional features which may be desirable, if any.

2.6. Description of Work. The Contractor shall describe in his or her proposal how they will manage the project. The Contractor shall identify key players and their abilities to manage projects of this magnitude, including scheduling methods, reporting and execution.

2.7. Reserved.

2.8. Scope of Work:

2.9. Approximately 1,720 square feet of roofing on Facility 2050 is to be replaced, with deck patching required for removed equipment curbs. This includes work on drains, downspouts, and curb/insulation crickets necessary to maintain a watertight roof with proper slope and a twenty year warranty. The government is open to all best value solutions. For MEP refer to attached drawings.

2.9.1. Materials: All materials used are to be recommended by the roofing system manufacturer for the intended use and compatible with the used roofing system.

2.9.2. Installation: The installation of all materials is to comply with the roofing system manufacturer’s written instructions for installation and best industry practices. Tapered insulation must be used to achieve positive drainage to all times.

3. Architectural/General contractor:

Refer to drawings A201 and A202. Project scope includes complete demolition and replacement of approximately 1,720 sf of the flat roofed building. Remove and dispose of 1 abandoned rooftop equipment curb, 2 fan equipment curbs, 1 air intake curb, 1 exhaust stack curbs, 1 DX condenser curb with refrigerant pipe roof penetration, and patch roof opening at each location. See plans for sizes and locations. Install new roof top air handling equipment curb, 3 roof duct curbs, 2 fan curbs, and nominal 4 guy wire attachment points. (Curbs provided by mechanical contractor, installed by general/roof contractor. See plans for sizes and locations.) Provide 2 pipe/duct sleeves through existing hanger wall for new natural gas and hot flue vent exhaust stack. Provide and install 1 water proof pipe sleeve/curb through roof for new roof hydrant, coordinate location and installation. New flat roof system to be provided with crickets around new equipment curbs that would impede water to 2 existing roof drains. (Roof drains to remain and be reused. Pitch roof accordingly.) Disconnect and remove black light clam shell hoods over existing bench work area and roller section, see plans for clarification.

Remove and reinstall existing ceiling tiles and ceiling grid in areas identified for access to accomplish new work. Patch entry area ceiling as indicated on drawings as well as seal walls, doors, and roof gaps for areas indicated on plans for space pressurization purposes. Paint walls where joint and wall sealing took place to match existing. Relocate hood and tunnel section of vat tank work station as indicated on plans.

3.9.1. The roof replacement includes, but is not limited to the following items:

3.9.1.1. Prepare existing roof elevation to receive the roofing system complete with all accessories. To include custom, prefabricated; roof to wall flashings, curb flashings, stack flashings, drain boots, scuppers and miscellaneous penetrations.

3.9.1.2. Clean and prepare existing roof area. Complete removal and disposal of all obsolete roof top equipment. Inspect existing roof assembly and substrate condition prior to installation of new roofing system.

3.9.1.3. Guidelines: Furnish and install a roofing system in accordance with manufacturer’s written instructions and applicable recommendations of ARMA/NRCA quality control guidelines for the application of the roofing.

3.9.1.4. Roofing membrane sheet: The single ply membrane should be as a minimum an ASTM-

D 751, white, 40 mil single-ply membrane roofing system that is fabricated of a weft inserted low-shrink, anti-wicking polyester fabric and has a thermoplastic coating material laminated to both sides.

3.9.1.5. Insulation: Insulation should be compatible with other materials used for roofing system and achieve a minimum R-Factor of 20.

3.9.1.6. Heat welds: After all field heat welds, a hand and knee inspection shall be made of the entire length of the weld with a tack claw.

3.9.1.7.Parapets: On all parapet locations, remove existing coping cap and wrap parapet with new, pre-manufactured parapet flashings and terminate on exterior of wall.

3.9.1.8.Ponding: All deck sheets and parapets will be pulled tight and installed as wrinkle-free as possible. Care shall be taken to remove ponding areas and to ensure proper drainage on the roof deck.

3.5.1.9 Penetrations: Furnish and install new, pre-manufactured flashings on all roof penetrations as specified by the roof system manufacturer.

3.6.0 Canopy: The contractor is to remove and replace all rain downspouts with scupper at canopy as per Canopy Detail.

3.7.0 The removal and re-installation of security camera must be performed with the approval of the Security Forces.

3.8.0 Flashing: Remove all existing sheet metal flashing, replace with new. Form sections true to shape, accurate in size, square and free from distortion or defects; .032 mill finish aluminum parapet wall copings as applicable and .032 mill finish aluminum at roof to wall counter flashing and curb flashing as applicable.

3.9.0 Mechanical Contractor:

Refer to drawings M201, M202, and M301. Project scope includes complete demolition and removal of 2 rooftop exhaust fans, 1 rooftop remote condensing unit currently serving office area, 1 exhaust stack, and one intake hood. Demolition of DX cooled fan coil unit serving office area indicated on plans. The demolition of 1 hot water unit heater with associated piping back to hot water mains. The demolition of area ductwork as indicated on plans. The removal of black light clam shell and roller section of workbench/wash station hardware for installation of new hood. Remove 2 existing pneumatic hot water baseboard control valves and replace with 2 new DDC actuated control valves. New work consists of the installation of a 20 foot long x 34 inch wide

(nominal) 304 stainless steel fume exhaust hood over existing dip tank solvent washing stations, hoist, and black light inspection station as indicated on drawings, field verify for height. (Temporary draining of solvent tanks during the course of work and replacement of solvents at completion of work is the responsibility of this contractor). Fume exhaust hood to be provided with 5 independent fume hood vertical sash style sliding doors, see plans for intent. The installation of 2 new exhaust fans, supply ductwork, return ductwork, and exhaust ductwork as indicated on plans and per industry standards. (See plans for sound lined ductwork and sound attenuator locations.) The installation of 2 new exhaust fans with exhaust stacks. The installation of 1 new gas fired, DX cooled, roof top air handling unit RTU-1 (with hot gas reheat, horizontal supply and return, or roof discharge curb) along with gas service extending back to existing boiler room. The installation of new humidification unit with duct mounted steam dispersion tube and stainless steel flue exhaust duct. (See plans for size and intent.)

3.10.0 New Roof Top Unit (RTU-1) shall be sized for 100% outdoor air configuration with modulating outdoor air and return air motor operated dampers, 4” cartridge filter and 2” pre-filter. (Provide filter bank with differential pressure sensor and extend that signal to the base DDC building automation system for scheduling maintenance. BAS to receive warning at 0.3” filter loading over clean condition [adjustable], BAS to alarm when filters load to 0.35” over clean condition [adjustable].) RTU-1 shall have modulating indirect gas fired burner and modulating DX cooling with hot gas reheat capability for independent dehumidification operation. (Due to basis of design, RTU requires roof top side-discharge curb, so RTU is shown with exterior rated/galvanized equipment access stand. If contractor can provide RTU meeting performance with horizontal supply and return, equipment stand not needed.) RTU-1 shall be capable of variable frequency drive

(VFD) turn down to 1600 CFM (with 600 CFM of outdoor air at this condition). (VFD can come factory installed or can be provided and installed by the electrical contractor.

Mechanical contractor to coordinate. VFD shall be internally factory installed or mounted to the RTU with exterior rated enclosure.) RTU-1 shall be capable of maintaining 68 degree space temperature 50% relative humidity in the space during summer conditions and 72 degrees space temperature with 35% relative humidity in the winter (with use of new H-1 humidifier). Provide RTU-1 with 120V convenience outlet with power extended up through equipment curb. RTU-1, H-1, EF-2, EF-3, motor operated dampers, space temperature sensor, and space humidity sensor shall electric/electronic and be open protocol BACnet compatible and shall be interconnected to the base building automation system (TRACER TRANE). Mechanical/controls contractor shall provide DDC controller provided with all appurtenances needed to provide control of RTU-1 along with control sequences identified on design drawings. The mechanical/controls contractor shall extend this controller back to TRACER parent system. Space temperature and humidity sensors shall be of adjustable type so space users can adjust temperature and humidity. Ductwork and fume hood will be made of material and gauge thickness as identified on plans and meeting industry standards. Roof equipment curbs will be 12” minimum in height and insulated and flashed per industry standards. Mechanical equipment curbs shall be provided by mechanical contractor, installed by general/roofing contractor. Roof duct and pipe stands shall be UV impervious butyl rubber base with adjustable saddle heights designed for roof installation without harming roof membrane.

3.11.0 Balancing of RTU-1 with the VFD will need to be accomplished at the same time as the air balancing of the ductwork in the space is accomplished. RTU-1 outside air and return air dampers will need to be set/configured via trial and error to get the CFM air balance correct. See plans for occupied and unoccupied CFM design conditions in order to maintain space pressurization design intent.

4 RTU-1 is based on AAON RN-015 and is rated for 2700 CFM (100% outside air unit with stainless steel heat exchanger) with turn down to 1600 CFM (at 600 CFM of outside air). 1.0” ESP, 460/3 phase, 34 FLA, 45 amp maximum overcurrent. Nominal 16 tons of cooling, 230 MBH indirect modulating gas fired heater with minimum 10:1 turn down, provide with gas regulator if unit cannot take existing gas inlet pressure.

5 H-1 is based on Pure Humidifier GX-3 150 MBH natural gas fired humidifier. Unit rated for 70-110 pounds per hour with duct mounted steam dispersion tube. 120V power.

Provide with gas regulator if unit cannot take existing gas inlet pressure.

6 EF-2 is based on Cook 150 CPV rated for 1800 CFM at 1.5” ESP, 1 HP, 208V single phase motor with modulating speed controller (for balancing purposes), and spark proof constructed fan. Provide with 120 V circuit for motor operated damper.

7 EF-3 is based on Cook 80 CPV rated for 400 CFM at 1.5” ESP, 0.5 HP, 208V single phase motor with modulating speed controller (for balancing purposes), and spark proof constructed fan. Provide with 120 V circuit for motor operated damper.

8 Plumbing Contractor:

9 Refer to drawing P201. Relocate existing eye wash station and extend new water and sanitary to existing utilities to serve new gas fired humidifier and roof hydrant. Rework sanitary vent piping to allow for new duct layout. Add new freeze proof roof hydrant

(equal to Woodford RHY2-MS) on roof for RTU-1 maintenance, extend drain to area floor drain under fume hood work bench. See plans for intent.

10 Electrical Contractor:

11 Refer to drawing E201. Remove and replace 2 existing electrical panels (480V and

208V/120V) and extension of electrical circuits as indicated on drawings. (Field verify for quantity [44 breakers currently in 208/120 panel], and provide new modern style

208/120 panel to back feed existing circuits and meet new work requirements with at least 10 additional breaker spaces available for future.) Disconnect power for 2 roof exhaust fans, 1 hot water unit heater, 1 remote DX compressor, and 1 DX fan coil unit located above the office ceiling. Remove and reinstall/relocate 1 ceiling light to accommodate new HVAC ductwork. Disconnect power to work bench clam shell black lights. Disconnect 4’ sections of electrical conduit at the roller and tunnel stations to allow for relocated bench equipment; reconnect these conduit sections after bench equipment relocation. Provide new 460V electrical service with disconnect to new roof top unit RTU-1, provide with 1 outdoor 120V NEMA rated convenience outlet. Provide new 208V electrical service and disconnect to EF-2. Provide new 208V electrical service and disconnect to EF-3. Provide 120V service with disconnect to 3 motor operated dampers (MOD-2, 3, & 4). Provide 120V service with disconnect to humidifier H-1.

Provide 4 vertical mounted LED lights in fume hood, see plans for intent. Extend existing black light electrical service to hood and provide 2 new black lights located within new fume hood, or provide new electrical service to lights, contractor’s option.

(Contractor may relocate existing black light lighting fixture into hood versus providing new fixtures if clearance can be maintained with overhead hoist. Contractors option, field verify.)

12 Waste Management: All dumpster service and waste management shall be provided at no additional cost to the government.

13 Quality Assurance: Once installation is complete, a manufacturer’s Quality Assurance

Specialist (QAS) shall inspect the visible details of the roofing system for acceptability for warranty issuance. Any deficiencies shall be corrected by the Contractor and made ready for re-inspection within five (5) working days. Warranty shall be promptly issued upon acceptance by the QAS.

14 Warranty: Provide a manufacturer's minimum 20-year weather tightness, workmanship and material warranty for the roof. Provide a 1 year warranty for all parts and labor on mechanical equipment, a 5 year warranty for the humidifier and VFDs, a 5 year warranty for air handling units and fans, and 20 year warranty for AHU heat exchanger.

15 Existing Utility Interruptions: Do not interrupt utilities serving facilities occupied by

Owner or others unless permitted under the following conditions:

Notify the COR prior to arranging with Baltimore Gas and Electric (BG&E) to shut off and turn on electrical and/or natural gas utilities. Notify the COR not less than 7 days in advance of proposed utility interruptions. The Government will be responsible for all

BG&E connection fees.

Do not proceed with utility interruptions without the COR’s written permission.

16 Submittals: Provide submittals for all mechanical equipment along with air balance report at completion of project. Provide one bound copy of submittals along with copy saved to disc.

17 Drawings: Review attached drawings for the general layout of the systems involved and the extent, type and detailed requirements of the construction work. A201, A202, E201, M201, M202, M301, and P201.

18 Product Information: Provide the following product information and material samples for approval by the COR:

Latest manufacturer's installation instructions.

Copies of welding certification.

Shop drawings with material gauge of hood fabrication materials.

Submittals for air handling unit, humidifier, and exhaust fans.

Size, material and finish of any new drainage devices.

Roofing membrane material.

Wall/joint sealing material.

Mechanical fasteners

Cover deck material.

Insulation

All auxiliary materials (adhesive, flashing, caulking etc.)

19 Installer’s Qualification: A qualified firms that are approved, authorized, or licensed by the roofing system manufacturer to install the manufacturer’s product and that is eligible to receive the manufacturer’s warranty. Same for licensed mechanical, electrical, and plumbing installers for installation, start up, and testing of mechanical, electrical, and plumbing equipment.

20 Administrative: A preconstruction meeting will be held prior to notice to proceed letter being issued. Vendor will be responsible for providing all documentation noted by the contracting officer prior to this meeting. In addition, meeting minutes will be kept for the preconstruction and any progress meetings held. The awardee will be responsible for keeping all meeting minutes and distributing a copy for review within 3 business days after meeting to all parties. All parties will have 2 business days to make any corrections prior to a final version submitted. If no comments are received, the awardee may submit as the approved version.

EXISTING VAT TANK WORK BENCH WITH HOIST SYSTEM TO HAVE FUME HOOD ENCLOSURE

INSTALLED ABOVE/OVER IT. SHOWN FOR COORDINATION/INTENT.

--- End of Statement of Work ---