Exhibit_B_-_Statement_of_Work,_4850L_Refuge_Chamber_Capacity_Increase,_Rev._2,_10-10-18.pdf

FSCF Refuge Chamber Statement of Work

Fermi National Accelerator Laboratory 1

Long Baseline Neutrino Facility

4850L Refuge Chamber Capacity Increase Statement of Work

Version 2

October 10, 2018

Fermi National Accelerator Laboratory 2

Revision Log

Version Responsible Person Version Date Description of Changes

1 Joshua Willhite 9/21/18 SOW for advertisement

2 Brent Knottnerus 10/10/18 Included QC and Safety Review

Comments

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1.0 Background

The Long Baseline Neutrino Facility (LBNF) is a Department of Energy (DOE) funded project managed by the Fermi Research Alliance (FRA), which is a contractor for the DOE. As such, the term “subcontractor” is used throughout this document to identify the successful proposer to this solicitation. The LBNF project will provide a facility in which an internationally managed science experiment, the Deep Underground Neutrino Experiment (DUNE), will be constructed and operated. One component of the LBNF project is at the 4850 level of the Sanford Underground

Research Facility (Sanford Lab) in Lead, South Dakota. The Sanford Lab is owned and operated by the South Dakota Science and Technology Authority (SDSTA). The current Refuge Chamber (RC) at the 4850 level of the Sanford Lab is part of the Ross Campus area (near the Ross shaft) and was designed to be a safe area for the underground population in the event of an emergency. If an emergency requires evacuation of the 4850 level, the primary exit from underground is the Yates shaft. If the primary exit is unusable or blocked by a hazard, anyone underground must wait in the

RC until help arrives. The RC consists of standard safety supplies, food, AC units, water, and air scrubber units with oxygen bottles to supplement the air scrubbing process. Once activated, the RC is presently designed to provide 72 people with enough food, water, and breathable air for 96 hours.

When construction for LBNF begins, the maximum allowed limit of people underground will need to increase to 144 people. The objective of this project is to modify all aspects of the RC so that in the event of an emergency, it can support an underground population of at least 144 people for 96 hours. An interior photo of the current RC is shown in Figure 1 below and the general footprint of the RC is shown in Appendix A.

The RC cooling system has been upgraded to support the cooling load of 144 people. The RC is cooled by four 36,000 BTU Mitsubishi ductless air conditioners (Figure 1). All condensers for the

AC units are located outside of the RC in a cutout of a parallel drift. The current cooling capacity available for this area is 144,000 BTU when the four units are running. The combined cooling capacity of all air conditioners is enough to cool the RC with 144 people inside with an ambient surrounding rock temperature of 93 F, and therefore no additional scope is required for cooling.

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Figure 1. Refuge chamber (RC) at the 4850 level

2.0 Statement of Work

The scope of work involves the design, procurement, fabrication, and installation of all necessary items required to outfit the RC to support 144 people for 96 hours. Supporting 144 people will require revisions to the current airlock, removal of the old CO2 scrubbers, installation of the new CO

& CO2 scrubbers, food water & general safety supplies, and installation of a compressed air breathing filter. All items associated with the refuge chamber must comply with MSHA regulations 30 CFR

7.504 which gives general requirements for refuge alternatives and components.

The project scope includes the following:

2.1 Removal of two existing CO2 scrubbers - The subcontractor is responsible for the disassembly and removal of both scrubbers (including filter pack inserts). These scrubbers are larger than the doors entering the RC, so the scrubbers must be disassembled and cut into pieces to get them out of the RC. The subcontractor is responsible to transport the scrubber pieces from outside the RC to the loading area of the Yates shaft. SDSTA will be responsible for transporting the items within the shaft.

Once the items are removed from the shaft by SDSTA the subcontractor will be responsible for proper disposal. The distance from the Yates shaft to the Refuge

Chamber is approximately 2,500 ft and is shown in Appendix B

2.2 Compressed Air Line - The subcontractor shall verify the design, and then install approximately 700 ft of 2” sch 40 ASTM A53 grade B pipe that will be used as a compressed air supply line. The subcontractor will install the compressed air line from the Ross shaft to the outside of the airlock room. More details for this line are provided in Appendix C.

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2.3 Compressed air management system (CAMS) - The subcontractor is responsible for design and installation of a CAMS (provided by a distributor/Vendor with installation by subcontractor), including connection to the 2” compressed air supply line mentioned in

Item 2.2 above. The installation of the airline (in the airlock and RC) will require two penetrations through existing CMU block walls. The subcontractor is responsible for the supply and installation of a complete and functioning CAMS. This system must provide breathable air from the installed compressed airline and include all filters, regulators, and oxygen toxicity monitoring equipment specified by the subcontractor.

2.3.1 The complete CAMS is to be designed and submitted for review (shop drawing style review cycle) prior to its installation, including all penetrations through

CMU block walls to meet 30 CFR 7.506 requirements.

2.3.2 Once installed, the CAMS will need to also provide air for the positive pressure airlock described in Item 2.4 below.

2.4 Revisions to the airlock entrance - The current airlock (Figure 2) operates on a purge style system that requires groups of people to wait outside the RC in the airlock area for extended periods of time while the system purges. The subcontractor will be responsible for the design, supply and installation (with assistance of a subcontractor/Vendor) of all items necessary for positive pressure style airlock. A positive pressure style airlock builds a slight pressure differential between the airlock and outside atmosphere. The slight pressure differential substantially reduces the amount of CO that follows occupants into the airlock in the event of a fire, allowing for a faster purge and a more rapid entrance of individuals into the RC. The CAMS will provide the primary charging air and purge air. If the CAMS fails, charging and purging air will need to be supplemented by the compressed air bottles. Currently there are 24 compressed air cylinders in the airlock that can be used as part of the calculated total. The entire airlock system must meet 30 CFR 7.508. The key items for the airlock design are:

• Removal of the two standard metal doors in the airlock

• Installation of two sealing bulkhead doors with windows (within the existing frame) existing frame size is 36” x 80”

• Installation of a compressed air bottle common purge backup manifold with a minimum of 20 backup purges available

• Installation of an exterior purge button hooked to the CAMS with compressed air bottle backup

• All changes to the airlock must go through a design review process

• Submittals must be provided for all newly installed equipment in the airlock

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Figure 2. Airlock area before the RC

2.5 Installation of new CO/C02 scrubbers - The subcontractor will be responsible for the purchase & installation of the new scrubbing system and CO/CO2 filter packs inside the RC along with the required amount of emergency food and water specified by the distributor.

The scrubbing system must:

• provide enough CO/CO2 scrubbed breathable air for 144 people for 96 hours evenly distributed throughout the entire RC (no stagnant areas) and meet 30

CFR 7.508 requirements for CO2 concentrations.

• Use the compressed air supplied from the CAMS as primary makeup air after the scrubbing process.

• Use compressed oxygen bottles with manual regulators as a backup if compressed air is lost. SDSTA has 36 compressed oxygen cylinders (K size high pressure cga 540) in the RC now that can be used for this project in addition to the calculated total.

• Subcontractor is responsible for all calculations and sizing of the scrubbing system

• The entire scrubbing system must go through a submittal and review process.

The emergency food and water:

• All food and water will be purchased in-house and is not part of the vendors scope.

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2.6 Installation of remote gas monitoring - The subcontractor will be responsible for the purchase and installation (with assistance of a subcontractor) of an air quality monitoring system (in the RC) that can be viewed over the facilities network. The newly installed system must be compatible with the GE iFIX industrial automation system. This system must monitor Temperature, CO, CO2 & O2 concentrations within the RC, airlock, and area outside the RC. Currently there is an Ethernet hookup within the RC for this type of system.

The installed monitoring system must meet 30 CFR 7.508 and go through a submittal and shop drawing review process.

2.7 Installation of Instructions and user training - Once the outfitting of the RC is completed, the subcontractor will be responsible for installing all operational plaques.

These plaques must be mounted near the equipment they are referencing and provide clear instructions on its proper operation. Upon completion of the project, the subcontractor will be responsible for ensuring the appropriate facility employees are trained on the proper use and maintenance of the RC.

2.8 Installation of backup generator fire sprinklers - The backup generator and fuel tank that will power the RC in the event of a power loss is lacking fire suppression. The subcontractor will be responsible for the design and installation of a fire suppression sprinkler system and water curtain above the generator and fuel tank that satisfies NFPA

13 requirements for head spacing. The system is to be a wet-style, sprinkler-type with high-temperature heads (200oF) with an isolation valve and water flow detector dedicated for the generator area. The generator area fire suppression system design is to be submitted for review/approval by the Owner prior to installation. The suppression system is described in more detail in Appendix D.

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Appendix A: Current Configuration of the Refuge Chamber

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Appendix B: Entrance of the Refuge Chamber to the Yates Shaft

Yates Shaft

Refuge Chamber

Path from the Yates shaft to the Refuge Chamber ≈ 2,500 ft

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Appendix C: Compressed Air Line Installation

Primary breathing and purging air will need to be supplied by a new 2” compressed air line that taps into the 6” main compressed air feed located in the Ross shaft. The distance from the Ross shaft to the RC following the route shown in the figure below is approximately 500 ft.

Ideally, the entire 500 ft would be a permanently installed steel line. However, shortly after the RC is upgrade with the items for this project, a large amount of construction will be taking place around the Ross shaft area. The construction around the Ross shaft will require the 2” compressed air line to be moved periodically to accommodate the construction activities while keeping compressed air supplied to the RC.

To eliminate the cost of removing newly installed piping, SDSTA will install a temporary line made from 2” bull hose. The temporary line will connect to the Ross shaft main supply line and run approximately 150 ft down the drift shown by the red line in the figure below. The temporary line will be secured to the back (ceiling) in line with the permanent path. The subcontractor will be responsible for tying into the temporary line (at this location) and installing the remaining 400 ft of permanent steel line (including hangers and compressed air taps) into the RC. The steel line ends inside the RC and is shown in the figure below. More detailed information for this line is listed below.

Piping and Attachments:

• All steel piping shall be ASTM A53 Grade B sch 40

• All piping sections can be no longer than 10 ft

• Pipe ends shall be rolled grooved

• All couplings shall be QuickVic flexible couplings Style 177N or similar with E gaskets

• All valves shall be Vic-Ball Valves Series 726 or similar Air Taps:

• Air taps shall be located at the locations on the drawings

• Air taps shall consist of a 2x2x2 Tee (Vic No. 20) with Vic-Ball Valve Series 726 or similar Pipe installation where Unistrut is not available:

• New hangers, epoxy, rods, fasteners etc. shall be purchased and installed by the subcontractor in the locations marked in green on the figure below. These locations have no Unistrut rack available. These hangers will consist of threaded rod epoxied into the back of the drift with a clevis pipe hanger holding the pipe.

• All threaded rod shall be 3/8” ASTM A307 Grade A zinc plated

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• Nuts and washers shall have similar finish to the threaded rod

• Epoxy resin shall be Hilti HY 200-R or similar

• Threaded rod embedment depth shall be a minimum 7 inches

• Clevis pipe hangers shall be 2” standard duty zinc plated

• Span for new hangers shall be no more than 10 ft

Pipe installation where Unistrut is available:

• New hangers, fasteners etc. shall be purchased and installed by the subcontractor in the locations marked in blue on the figure below. These locations have a Unistrut rack available to hang the new pipe from. These hangers will consist of clevis pipe hangers attached to the existing Unistrut holding the pipe.

• Clevis pipe hangers shall be 2” standard duty zinc plated

• Hangers shall be installed at each available Unistrut section

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Appendix C Figure. General Path of the Compressed Air Line from the Ross Shaft to the RC

Start

Temporary air line installed by SDSTA

Installed by contractor (no unistrut rack)

Installed by contractor (unistrut rack)

End

Air Tap

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Appendix D: Fire Suppression System Installation

If main power is lost to the RC a backup generator will activate and provide backup power to critical items in the RC. The backup generator is installed in a cutout approximately 150 ft away from the entrance to the RC (Figures D1 & D2) which is an additional 100 ft away from the 6-inch sprinkler main feed. Currently the generator cutout has no fire suppression system installed and is shown in Figure D3 below.

The preferred suppression system would be water sprinklers over the generator and fuel tank with additional water curtains to isolate the generator from the adjacent drift. The water curtains will be used to suppress smoke, in the event of a generator fire, from traveling up/down the drift regardless of airflow direction. The generator sprinkler system must be designed per NFPA 13 under ordinary hazard classification. The system will need to tie into the existing fire sprinkler system piping (Figure D4), and control panel that provides fire suppression and monitoring for

CASPAR, BHUC, & Electroforming lab spaces (Figure D5). The generator sprinkler branch should be monitored similarly to the other lab branches (Figure D6).

The general layout of the sprinkler system is shown in Figure D2. The subcontractor will be responsible for the design of the system and purchase/installation/commissioning of all items required. Additional information for this system is listed below.

Piping and Attachments:

• All steel piping shall be ASTM A53 Grade B sch 40

• All piping sections can be no longer than 10 ft

• Pipe ends shall be rolled grooved

• All couplings shall be QuickVic flexible couplings Style 177N or similar with E gaskets

• All valves shall be Vic-Ball Valves Series 726 or similar Pipe installation where Unistrut is not available:

• New hangers, epoxy, rods, fasteners etc. shall be purchased and installed by the subcontractor in the locations marked in green on the figure below. These locations have no Unistrut rack available. These hangers will consist of threaded rod epoxied into the back of the drift with a clevis pipe hanger holding the pipe.

• All threaded rod shall be 3/8” ASTM A307 Grade A zinc plated

• Nuts and washers shall have similar finish to the threaded rod

• Epoxy resin shall be Hilti HY 200-R or similar

• Threaded rod embedment depth shall be a minimum 7 inches

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• Clevis pipe hangers shall be 2” standard duty zinc plated

• Span for new hangers shall be no more than 10 ft Pipe installation where Unistrut is available:

• New hangers, fasteners etc. shall be purchased and installed by the subcontractor in the locations marked in blue on the figure below. These locations have a Unistrut rack available to hang the new pipe from. These hangers will consist of clevis pipe hangers attached to the existing Unistrut holding the pipe.

• Clevis pipe hangers shall be 2” standard duty zinc plated

• Hangers shall be installed at each available Unistrut section

Clarifications:

• Final AutoCAD .DWG design files shall be provided to SDSTA for the fire sprinkler system.

• Subcontractor is responsible for all labor and materials associated with the installation of the sprinkler system including all mechanical/electrical and commissioning work.

• SDSTA will transport materials for this project from the surface to the 4850. Once unloaded at the 4850, the subcontractor will be responsible for transporting them to the worksite

(Appendix B figure above).

• SDSTA will be responsible for draining and refilling the sprinkler system if needed. However, the subcontractor must give SDSTA a 2-day notice before the sprinkler needs to be drained.

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Figure D1. Generator cutout looking towards the RC

Figure D2. General Path of the Sprinkler Line from Tie in Location to Generator Cutout

2" Tie In

Installed by contractor (no unistrut rack)

Installed by contractor (unistrut rack)

Fuel Tank Leg

Water Curtains

Generator Leg

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Figure D3. (Top) Taken with back facing the RC, (Bottom) Back facing end of cutout

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Figure D4. (Top) 2” main sprinkler tie in, (Bottom) 2” Tie in facing the generator cutout 250 ft away

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Figure D5. Alarm control panel for lab area fire suppression

Figure D6. Branch monitoring for one of the lab areas