J-3 Argon Piping Supply and Install SOW (2).docx

Argon Gas Piping Supply, Installation, and Testing Statement of Work (SOW) Acronyms and Abbreviations

Long-Baseline Neutrino Facility (LBNF) / Deep Underground Neutrino Experiment (DUNE) - US

LBNF/DUNE-US

Argon Gas Piping Supply, Installation, and Testing Statement of Work (SOW) 03/27/2026

Document Number:

Argon Gas Piping Supply, Installation, and Testing Statement of Work (SOW)

Long-Baseline Neutrino Facility (LBNF) / Deep Underground Neutrino Experiment (DUNE) - US Page 1 Document Approvals

Originator: Joshua Willhite

Approver (FermiForward Procurement): Susan Underwood

Approver (FermiForward ESH): Mike Andrews

Approver: (FermiForward QA): Ashlee Banks

Approver: (FermiForward Project Director): Jim Kerby

Approver:

Revision History This version of the document may not be the current or approved revision. The current revision is maintained in the LBNF/DUNE Document Management System (DocDB) or the Engineering & Equipment Data Management Service (EDMS) where internal Project document approvals are managed. DocDB can be accessed through the web by authorized users (https://docs.dunescience.org/), and EDMS can be accessed through the web at https://edms.cern.ch. This document can be identified by the revision date as indicated in the Version Control Table below.

The current approved version is always available in DocDB or EDMS.

Original

Updated for solicitation

Table of Contents

List of Figures Figure 1: DOE Underground Leased Space at SURF 1-1

List of Tables Table 1. Subcontractor Required Training Courses 4-6

Acronyms and Abbreviations

Argon Gas Piping Supply, Installation, and Testing Statement of Work (SOW)

Long-Baseline Neutrino Facility (LBNF) / Deep Underground Neutrino Experiment (DUNE) - US Page iii Introduction Background The Deep Underground Neutrino Experiment (DUNE) at the Long Baseline Neutrino Facility (LBNF) was borne out of the 2014 U.S. Particle Physics Project Prioritization Panel (P5) recommendations. The recommendations called for the formation of a truly international collaboration for constructing a US-based long-baseline neutrino oscillation experiment with a powerful neutrino beam (~MW scale), a massive liquid argon TPC (40 kt) sited several hundred kilometers downstream of the neutrino source and deep underground, and a smaller detector just downstream of the beamline. Together these elements will have the capability to unambiguously determine the neutrino mass ordering, search for CP violation in the lepton sector, search for proton decay, and observe neutrinos from core collapse supernovae.

The LBNF/DUNE-US Project is the DOE-funded construction project to create the facility and contribute to the US scope of the international DUNE Collaboration. The major participants in the overall LBNF/DUNE enterprise are the international DUNE collaboration, the LBNF/DUNE-US construction project, the DOE, international funding agencies, Fermilab (in Batavia, Illinois) as the host laboratory, and the Sanford Underground Research Facility (SURF, in Lead, South Dakota), where the far detector will be located.

Figure 1 illustrates the general underground work area at the SURF (far) site.

Figure 1: DOE Underground Leased Space at SURF

Purpose of SOW As part of the DUNE experiment, approximately 40,000 metric tons of Argon is required to be transported from the surface to the Central Utility Cavern (CUC) at the 4850 Level. This Argon will arrive at the Ross Shaft Argon Receiving station in liquid form where it will be stored in tanks. It will then be converted to the gaseous phase, where it will be transported underground through a stainless-steel pipeline. This pipeline will be 8” diameter Schedule 10 between the Argon Receiving Facility and the Ross shaft, 6” diameter schedule 10 from Ross shaft collar to the 4850 Level, then return to 8” diameter schedule 10 from the Ross shaft to the CUC.

This SOW defined as “Argon Gas Piping Supply and Installation for LBNF” outlines the requirements for the supply, installation and testing of a stainless-steel pipeline at LBNF as described above.

Assumptions All work is to be performed at SURF located in Lead, SD. Figure 2 below shows the overall site plan at the Ross Shaft where Surface construction is to take place as well as the Ross Headframe which stands above the Ross Shaft where the Argon pipe is to be installed in:

Ross Headframe Shared Storage Locations N

Figure 2 – Ross Yard Area (SURF) Storage locations for the Contractor’s materials, equipment and trailers will be in the locations shown in Figure 2 above. The Subcontractor will need to share this space with other Subcontractors. For planning purposes, assume a 30’ x 80’ area is designated for this scope on surface, with access on one side for forklift access (i.e. entire area is available for storage). If the space provided is not sufficient, FFDG and SDSTA will work together with the Subcontractor to find a suitable location.

SURF is open for access 24 hours a day, 7 days per week. Construction work is to be performed within this schedule.

The Ross shaft will operate personnel trips as defined below from Monday to Saturday:

0. Day Shift: 6:00 am to 8:15 am, 3:00 pm to 4:15 pm

0. Night shift: 4:30 – 6:30 pm, 1:00 am to 2:30 am (Night shift schedules may be adjusted based on contractor requests) No shaft activities shall take place that would affect shaft operations or have a potential for dropped objects into the shaft during personnel runs. The shaft will be dedicated to pipe installation between personnel runs (~18.25 hrs/day). Material deliveries for others will be managed through the Yates Shaft to avoid interruption to the shaft pipe installation. Anticipate 5 material deliveries per week through the Ross Shaft, which will be coordinated with the pipe installation, but may result in 1 hour delays each.

The Subcontractor should plan for Ross Shaft work to be performed as expeditiously as possible to return the shaft to normal operations. Two shifts per day are required. The time of shift(s) shall be coordinated to minimize the impact on routine shaft operations.

Weekend work should be planned with the exception of Sunday Day shift (6:00 AM – 4 PM) when SDSTA performs shaft maintenance.

Surface construction should be limited to minimize noise outside of the hours of 7:00 am and 5:00 pm. A noise ordinance is in place with the City of Lead that restricts noise levels at the SDSTA property boundary (~180 feet from the Ross Headframe at the closest point) to 60 dBa during the day (7 AM to 5 PM) and 55 dBa at nigh (5 PM to 7 AM)t. This equates to roughly 95 dB max during the day at the building, or 90 dB at night, though the project would strive to avoid any neighbor complaints. Light pollution off site shall also be limited.

Underground construction (at the 4850L) is less constrained and does not require two shifts per day, but the Subcontractor will be allowed to work 2 shifts per day and schedule their shifts around the cage man trip schedule. Weekends are also available for this work.

All bidders will be required to attend a prebid site visit/job walk.

Access to the site is through the Ross Gate to the Ross yard and Headframe. The Ross gate is staffed by a security guard 7 days per week, 24 hours per day.

The work is to be performed at the Ross yard, Ross shaft and Headframe, and 4850 Level.

The subcontractor will have the responsibility to deliver all equipment and materials to the site, where the SDSTA will off load and stage in the Ross Yard. All equipment and material required to be transported and installed underground must be sized to fit within the load dimensions and weight limitations imposed by the Ross Shaft and its conveyances. SDSTA operates the Ross Shaft hoisting system which conveys a double deck Personnel and Material cage conveyance in the Cage Compartment and a Material conveyance in the North Skip compartment. Details regarding these limitations are provided in various files included in Appendix 1. SDSTA Shaft Operating personnel have the responsibility to transport the Subcontractor’s material and equipment through the Ross Shaft to the 4850 L and to the work area (including within the shaft where applicable). The Subcontractor will be responsible for assembling and disassembling any equipment it chooses to use for construction at the 4850 L. Space for re-assembly underground will be made available for the Subcontractor’s use. Disassembly at surface on site shall be minimized (i.e. off-site disassembly whenever possible).

The Subcontractor will be responsible for all utility locates. Contact information for a local utility locator can be provided on request.

The Subcontractor will be responsible for obtaining all required permits to perform the work.

In addition to scheduled holidays, the Subcontractor shall plan for up to 7 days per year for weather related work stoppages. These work stoppages are not to be billed as delays to the project. Weather related work stoppages in excess of 7 days may be considered as delays and subject to delay charges.

Smoking, the use of tobacco products, vaping, alcohol, controlled substances or weapons are not permitted on SURF property

Timeline This SOW is intended to cover a performance period for construction beginning in May 2027, with the exact date to be defined with input from the successful offeror and with consideration for other on-site activities. The duration of activity at the surface (for trench installation) and in the shaft shall be minimized, as the shaft is the primary access for all other LBNF/DUNE activities underground. Activities at the 4850L are less disruptive to other activities and can be less aggressively planned.

An official Kick-off Meeting (KOM) will be scheduled at a mutually agreed upon date, time, and location as soon as practical after award of subcontract. The primary purpose of this meeting is to confirm that the project participants understand the terms and conditions of the subcontract, the SOW, the specifications and drawings, the safety and the quality assurance requirements, and the work activities involved with each task.

Applicable Documents Reference documents that aid in defining tasks within this SOW are provided to supplement it. They are listed here.

Appendix 1: Ross Shaft Conveyance Designs Appendix 2: Argon Piping Design Drawings Appendix 3: Miscellaneous Supporting Documents Appendix 4: Ross Headframe Improvements Appendix 5: Specifications Appendix 6: Ross Shaft Design Drawings

These documents are provided as attachments to the RFP documentation.

SOW Performance Requirements The Subcontractor shall furnish all properly qualified management, personnel, facilities, materials, supplies, tools, transportation, and equipment with appropriate accessories (except as provided by FFDG) and shall plan and coordinate with LBNF/DUNE-US project management to assure effective performance of all construction and/or services described in this SOW. The Subcontractor shall provide all labor, equipment, supplies, materials, supervision, shop facilities, design personnel, management personnel, required sub-tier vendors, software, hardware, and office space for completing this scope of work.

Testing and Inspection The Subcontractor is responsible for performing all inspections and testing as defined in the design and specifications included in Appendix 2 and 5. Welding inspections may be provided by the subcontractor if the inspecting personnel are certified for the specific welding performed, or by a third party inspector. FFDG will provide independent inspection and testing of a small fraction of the welds for added assurance.

The Subcontractor is to perform all site inspections and utility locates and/or familiarize themselves with the above surface utility locations over the entire area of construction from the Argon Receiving station to the east end of Central Utility Cavity at the 4850 L.

General Requirements The Subcontractor shall meet FFDG at specified times during each planned work shift to agree on priority for daily activities. A report shall be provided for each shift describing work performed during that shift. These reports shall be provided not later than 2 shifts after the reported shift. Reports shall include:

· Loads moved: from-to, quantity, general description

· Areas cleaned

· List of staff working

· Logistics delays, cause of delay

· Notable safety items – both positive and requiring improvement

· Quality related issues

· Equipment status (available, down for repair/maintenance, etc.)

· Work performed with reference to locations of performance

Subcontractor is required to ensure that the site safety protocols are strictly adhered to. This includes the development of Job Hazard Analyses (JHA’s), Standard Operating Procedures (SOP’s), and work plans, and ensuring workers are fully aware of the contents of these and held accountable for following them or stopping work and making adjustments if needed. JHA’s, SOP’s, and work plans will be reviewed and approved by relevant stakeholders before work commences.

Required Tasks Task 1: Preparation of an Environmental Safety and Health (ESH) Plan Exhibit A For Supply and/or Services Subcontracts the Environmental, Safety, and Health Certification (ESHC) form will be provided to the Subcontractor for signature, indicating that the Subcontractor understands the requirement to comply with DOE 10 CFR Part 851. In addition, the Subcontractor must develop and submit a Site-Specific Environment, Safety, and Health (ES&H) plan which must comply with and encompass all applicable aspects of 10 CFR Part 851 Worker Safety and Health Program including 29 CFR Part 1910, OSHA Safety and Health Standards for General Industry and the DOE Hoisting and Rigging Standard DOE STD-1090-2020. The LBNF Project must approve the Site-Specific ESH Plan before the Subcontractor starts work Subcontractor understands the requirement to comply with 29 CFR Part 1910 and 10 CFR Part 851.

All Subcontractor personnel shall be required to attend various FermiForward provided trainings, listed below, and costs for these trainings shall be included in the proposal. Following is a summary of training required by and offered by FermiForward:

Table 1. Subcontractor Required Training Courses

The Subcontractor and any sub-tier Subcontractor performing work at SURF will be responsible for the following requirements concerning Subcontractor training.

1. The Subcontractor shall be responsible for assuring that their employees and sub-tier Subcontractor employees, who do not speak English, understand all ES&H requirements. The Subcontractor must be able to communicate any necessary instructions to those employees.

1. All Subcontractors/Subcontractors performing work at SURF shall provide to their employees any necessary ES&H training as may be required by federal/state regulations, aside from those provided above, and as appropriate for their Subcontract activities at Sanford Underground Research Facility (SURF).

Exceptions involve hazards that are unusual for subcontractor employees. For example, FermiForward normally provides appropriate training for Subcontractors working in Oxygen-Deficiency Hazard (ODH) areas (though this is not anticipated for this scope).

Records of ES&H Training that were provided by the Subcontractor, or others, and received by Subcontractor employees performing subcontractor activities at SURF shall be available for review by FermiForward.

Subcontractors shall maintain and provide FermiForward upon request, any and all occupational safety and environmental records.

Records required to be maintained by federal/state regulation.

OSHA injury/illness logs, training records Inspection records Safety meeting minutes Incident investigations documentation Additional records appropriate for the Subcontractor’s activities shall also be maintained and provided to FermiForward upon request. Examples include but not limited to the following.

Crane and Rigging Inspections Scaffolding Fall Protection If the Subcontractor intends to administer first aid or Cardiopulmonary Resuscitation (CPR), the Subcontractor must comply with 29 CFR 1910 Subpart K and make available the list of names of any employee. An Emergency Response Team (ERT) is on site 24/7/365 to respond to incidents and provide these services as necessary. Additionally, an on-site occupational health service is provided 24/7/365 to provide first aid.

Task 2: Preparation of a Quality Assurance / Quality Control Plan The purpose of the Construction Quality Management Program is to provide principles to encourage a mutual effort on the part of the Subcontractors and the Fermilab Projects to produce a quality project, on time and in accordance with the requirements of the contract, specifications and drawings. The complete Construction Management Program is composed of the Subcontractor’s Quality Control Program, and the Fermilab QA Plan.

Subcontractors shall maintain an adequate inspection system and perform such inspections as will ensure that the work called for by the contract conforms to contract requirements. The Subcontractors shall maintain complete inspection records and make them available to the LBNF Project for review. The Subcontractors’ staff will be held responsible for the quality of work on the job and are subject to removal by the LBNF Procurement Manager for noncompliance with quality requirements specified in the contract.

The Subcontractors are required to provide a tailored QC Plan document that meets the specific project quality control requirements. This plan shall detail the procedures, instructions, and reports Subcontractors will use during the project. The LBNF Project must approve the QC Plan before the Subcontractor starts work. The plan outlines and describes the process that the Subcontractors will use and the roles personnel will take on to satisfy the requirements of the QC Program and identifies the Definable Features of Work (DFOW) for the contracted scope of work.

The Subcontractor’s QC Manager implements and manages the QC System and is directly responsible to the Subcontractor’s project manager. The QC Manager shall work through the LBNF QA Representative assigned to the project for quality related matters.

In conjunction with the General Terms and Conditions Quality Requirements, unless otherwise specified by the work order or the FermiForward Task Manager, the Subcontractor’s QC Manager will be responsible for the following.

1. Preparation and submittal of a quality control plan that abides by the required testing and quality standards outlined in the applicable documents of Section 2 of this SOW and 014100 Quality Requirements included in Appendix 3.

1. All activities necessary to manage, control and document work to ensure compliance with the Subcontract requirements.

Ensuring adequate Quality Control services are provided for work accomplished on and off-site by his/her organization, suppliers, sub-tier Subcontractors, technical laboratories, and consultants.

The work activities include safety, testing, inspection, and all other functions relating to the requirements for quality work.

The quality and timely provision of workmanship and material provided under this subcontract Task 3: Preparation of a Project Schedule The Subcontractor shall prepare a project schedule that identifies the critical path for completion of this subcontract and key manufacturing, logistics or construction activities that will be linked to procurements. Subcontract deliverables described throughout this SOW shall be identified in the project schedule. Upon commencement of construction activities, the Project Schedule is to be updated monthly and more detailed schedules of planned work, excerpted and elaborated upon, from the overall schedule shall be provided weekly.

Task 4: Argon Pipe Supply and Installation The work is to be divided into three main construction areas:

Surface Construction An 8” diameter Schedule 40 stainless steel pipe shall be installed from the Argon Receiving Facility to the Ross Shaft in accordance with the design drawings provided in File: Surface Design From BSI Argon Piping IFC Drawings.pdf (Appendix 2).

A vertical section shall be extended 24" above ground and capped at the Argon Receiving station and the pipe shall be installed through the foundation into the Ross Headframe. Between these two locations, a trench shall be excavated, and the pipe buried in the trench in accordance with the civil design drawings. All pipe sections shall be welded in accordance with the drawings and specifications. A corrosion protective coating shall be applied as specified in the drawings unless soil testing demonstrates this is not required.

The pipe shall be installed through a borehole drilled from the outside of the Headframe through its foundations to intersect the underground tunnel used for personnel loading and off-loading from the Ross Cage. This tunnel is also known as the “Ross Ramp”. The floor of the Ross Ramp is approximately 14’ below the Headframe floor. The pipe shall penetrate the south wall of the Ross Ramp with clearance no less than 10 ft above the floor. In addition to the Argon Gas pipe, a 2” RMC conduit for data cable shall also be installed in the trench and borehole terminating at the west wall of the Ross Ramp. The argon pipe shall transition from schedule 40 to schedule 10 inside the Ramp at a convenient location for the Subcontractor.

From the wall penetration point, the Argon pipe shall be suspended from the ceiling of the Ross Ramp and extended to the north side of the shaft where it will follow a narrow corridor used for personnel access leading to the west side of the shaft. At the location indicated on the drawings, the pipe turns 90 degrees to the east and penetrates the shaft wall where it will transition to a vertical configuration for installation down the Ross Shaft.

Photos and videos of a similar effort performed nearby, involving the installation of a water line into the Ross Ramp, have been provided for reference in Appendix 3: Miscellaneous Supporting Documents.

The performance of this work will impact access to the Ross Shaft for routine operations. The Subcontractor shall coordinate construction activities with all other subcontractors and the SDSTA to minimize disruption to routine operations.

Ross Shaft Construction The Ross Shaft is the primary means of access for personnel, materials, equipment and utilities between the Surface and Underground for LBNF. It is divided into 7 compartments, are shown in the figure below:

Figure 3: Ross Shaft Layout The configuration of all the compartments as shown in the figure above is consistent throughout the shaft length except for the Pipe Services compartment which varies due to the changes in the number of pipes, piping sizes, and locations required to meet the needs of the facility. Underground Process Piping Drawings included in Appendix 2 show the design for the Argon Pipe in the Ross Shaft from where it enters the shaft at the Ross Ramp to where it exits at the 4850 L. As shown in the drawings, the location of the pipe in the Pipe Compartment varies depending on elevation. The routing has been optimized for pipe support bracket locations, expansion loop locations, and overall constructability considerations.

The shaft is serviced by a Double Deck cage conveyance which travels the Cage compartment transporting personnel, materials and equipment between the surface and the 4850 L. Details regarding the design of this conveyance are included in Appendix 1. In addition to the Double Deck cage, a Material Conveyance known as the “Skip Cage” is installed for the primary purpose of delivering long steel elements for the DUNE experiment installation. Details regarding the design of this conveyance are also included in Appendix 1. This conveyance travels the length of the shaft between the surface and the 4850 L just as the Double Deck cage does. Although the Skip Cage is not intended for routine use as a conveyance for personnel conveyance, it can serve as a platform for personnel to support construction activities in the shaft and is highly recommended to be utilized by the subcontractor to access to the Argon pipe at connection locations. Operation and maintenance of these conveyances are the responsibility of SDSTA operations personnel.

The Argon pipe is to be reduced from 8” diameter to 6” diameter as it transitions from the horizontal to the vertical entering the shaft at the Ross Ramp. From there, it shall be installed in the Pipe Services compartment to its exit at the 4850 L.

The Ross shaft is heated to prevent freezing and the temperature can be managed for personnel comfort within the shaft. Any local heat within the headframe or at surface shall be the responsibility of the Subcontractor at their discretion. Approximately 170 kcfm of ventilation air is drawn through the shaft.

Power is available at the Ross Headframe at 120/208 or 480V, with an electric room inside the building that can provide any needs for the subcontractor.

Installation of the Argon Pipe in the Ross shaft shall be coordinated with the owner and operator of the Ross Shaft which is the SDSTA. To facilitate coordination, file: Ross Shaft Argon Piping Responsibility Checklist.xls has been developed and is included in Appendix 3. Subcontractor proposals shall include this checklist with any comments for clarity.

The General Arrangements (GA) of the shaft set from the Surface to the 4850 L vary depending on location. These GA drawings are included in Appendix 6. The following lists the sets per GA:

Section 1 – Ross Ramp to 3500 L (Set 216) The Subcontractor shall set up a pipe erection and assembly system in the Headframe to lower assembled pipe sections down the shaft. Refer to file: 2025-08-08_AEI ROSS HF SLAB REPLACEMENT BULLETIN #1.PDF included in Appendix 4 for details regarding the General Arrangement of the floor space in the Headframe for the Subcontractor to set up a pipe erection and assembly system. The SDSTA has existing engineered grating available to cover the compartment which can be made available for use.

The Subcontractor must utilize the space to the west of the Pipe Services compartment for construction activities while maintaining space for access to the Cage Conveyance for routine shaft operations to be performed in parallel with the Argon Piping installation. Subcontractor may use the working platform provided by the SDSTA, and shall provide protection at the collar to eliminate the risk of materials falling into the shaft.

From the Ross Ramp to the 3500 L, the Argon pipe is to be installed in the first Pipe Location in the Pipe Services compartment just north of the North Skip compartment. Drawing 3708-G-200 shows the General Arrangement of a typical shaft set based on the original shaft set design. These sets exist at sets 1-3. Sets are spaced approximately 18’ apart throughout the shaft and are numbered from the top down. The Argon pipe is to pass into the shaft between sets 2 and 3 but will not be connected to these sets. The first connection will take place at set 4. Drawing UGI-H1-227-BR2 included in Appendix 6 shows the pipe location in the Pipe Services compartment.

The pipe shall be supported in the shaft using pipe support structures installed at sets 35, 74, 85, and 195 as shown on drawings U-FD-PP-801, 802 & 803 included in file: Ross Shaft Design from BSI Argon Piping IFC Drawings.pdf (Appendix 2). The Subcontractor is responsible for surveying each location in the shaft where pipe supports are to be installed, developing shop drawings for A&E approval, and fabricating and install pipe supports at these locations. Work platforms and overhead protection platforms will be installed at each location by SDSTA ahead of Subcontractor activities, based on the Subcontractor’s requested timing. These manways and overhead protection structures must be designed and supplied by the Subcontractor, with installation instructions provided to SDSTA. Examples of previously used work platforms are included in Appendix 3.

Expansion loops are to be installed at sets 8, 56, and 217. Details are shown on drawings U-FD-PP-902, 906, and 915, respectively. At each expansion loop location, platforms exist in the Manway compartment adjacent to the Pipe Service compartment, providing a work platform and overhead protection. Details of these platforms are shown on Drawing UGI H1 229, included in Appendix 6. Any additional platform and overhead protection requirements at these locations will be provided and installed by SDSTA in accordance with their standard platform design, as shown in Appendix 3. Expansion loops shall be pre-fabricated and welded to the vertical pipe sections where required in the shaft. At each set location, Shaft Pipe Guides, as shown on Drawing U-FD-PP-930, shall be installed.

Per Specification 226314 3.2.I (Appendix 5), tabs are to be welded on the sides of the pipe sections to allow clamping at the collar. This enables pipe sections to be welded above the collar and then lowered, allowing additional sections to be welded together to form a connected length for lowering down the shaft. Section length shall be determined by the subcontractor's chosen means and methods for lowering the pipe, but section lengths are expected to be maximized to limit welding performed in the shaft. All welds shall be leak-tested prior to lowering an assembled pipe section.

An electric winch installed in the Headframe is available for the Subcontractor to raise and lower pipe sections if desired. The winch specification sheet is included in Appendix 4. The sheave design for this winch, shown in 2025-08-08_AEI ROSS HF SHEAVE BEAM BULLETIN #1.PDF (Appendix 4), will be installed in the Headframe approximately 60 feet above the floor and aligned so the sheave cable centerline is directly above the Argon Pipe installation location for the first 3500 feet. The winch is limited by the SDSTA to 10,000 lb capacity, which reduces as more rope is used.

Although installation means and methods are determined by the Subcontractor, it is recommended that the first 3500 feet of pipe be installed from the 3500 L up to the surface. Each long section shall be lowered into position and welded in the shaft, with all welds leak-tested.

Section 2 – 3500 L to 4850 L (Set 217 to 295) At set 217, the Argon pipe must move to a new location in the Pipe Services compartment, north and west of the section installed up to that point. This adjustment is required to avoid a clash with other piping that exists in the shaft from the 3500 L to the 4850 L. The new location is shown on Drawings UGI-H1-227 BR2 and UGI-H4-277 R0 (Appendix 6). Drawings U-FD-PP-915 through 924 (Appendix 2) also show the Argon pipe location in the Pipe Services compartment; however, these drawings do not reflect the correct layout. The correct layout is shown on Drawings UGI-H4-227 and 277.

On the correct drawings, tabs are shown installed on the pipe support beams, which can be used for pipe support clamps as detailed in Drawing U-FD-PP-930, Detail 2. Please note that between sets 225 and 226, the pipe location must shift slightly north to align with Drawing UGI H4 277 R0, where it will remain until set 295.

To install this section of pipe, the Subcontractor will need to develop a means of installation other than assembling sections at the shaft collar and lowering them using the surface winch. The pipe location within the shaft presents a challenging installation. While the Subcontractor may choose a more efficient method, the baseline plan is to lower ~18-foot sections of pipe using the Material Conveyance (Skip Cage), loaded at the shaft collar, and install them sequentially, either from the 4850 L to the 3500 L or vice versa.

The electric winch at the headframe does no have enough wire rope to reach past the 3650L. The Subcontractor will be responsible to provide an extension rope or other means for pipe installation below this level, as well as any means to redirect the rope or secure other emans.

Each pipe section must be transferred from the Material Conveyance through the manway compartment to the installation location using rigging and lifting devices at each set. SDSTA will provide transport and assist with the unloading process. The pipe shall be slung into position and held in place for welding to the previously installed section. Each section shall then be secured to the shaft set using a shaft pipe clamp. The process shall be repeated until a complete pipe string is installed between levels. Leak testing shall be performed on the installed pipe string before installation of the next pipe string.

Section 3 – 4850L At 4850 L, the Subcontractor shall attach the Argon pipe to the Pipe Support Structure as shown in 4850 Level Pipe Support Structure IFC Drawings.pdf (Appendix 2). Provision and installation of this structure are included in this scope, including permanently supporting the fire water line, which will be temporarily supported during installation.

The section of the shaft between the 3500 L and 4850 L is wet due to various water inflows. The Subcontractor shall develop means and methods to install the pipe while accounting for shaft conditions and adhering to the installation specifications.

No work in the shaft may be performed while the Cage conveyance is in operation. During this work, the Ross Shaft will continue to be used for routine personnel transportation, but will be dedicated to pipe installation between personnel trips.

FFDG has included Shaft Pipe Lengths.xls (Appendix 3) for reference regarding set-to-set distances and associated pipe lengths.

Underground Construction Details associated with the installation of the Argon pipe at the 4850 L are shown in Underground Design BSI Argon Piping IFC Drawings.pdf (Appendix 2). A coordinated BIM model, included in Appendix 3, shows existing and newly constructed utilities, as well as the intended location of the Argon pipe relative to these utilities. The Subcontractor shall review this BIM model and make any adjustments necessary to ensure the Argon pipe can be installed without conflicting with existing utilities while meeting design requirements.

The Subcontractor shall design and install an anchoring and suspension system for the Argon pipe using drilled anchors into rock or shotcrete. Design requirements for this system are shown on Drawing U-FD-PP-930, included in Underground Design BSI Argon Piping IFC Drawings.pdf (Appendix 2). Shop drawings shall be submitted for review and must be approved by FFDG prior to installation. The A/E firm, Arup USA, will provide review comments to FFDG for consideration during approval, perform occasional inspections of completed work, and respond to requests for information (RFI’s) as needed.

A minimum of 30 kcfm of ventilation air flows through the drifts near the Ross shaft, increasing to as much as 160 kcfm at the east end of the caverns. Electrical power is available at 120/208V and 480V underground to support this installation as needed.

Training and Supplies The Subcontractor is responsible for providing their staff with the following training and provision of supplies:

· Training per person:

· Site-specific, provided by FermiForward:

· Reference Table 1

· Expected training provided by subcontractor:

· OSHA Training

· Annual Refresher

· Mobile Equipment Training

· Rigger Training

· Scaffolding Competent Person Training (as needed)

· Silica Training (for underground anchor installation)

· A quarterly Emergency Response Drill is managed by the SDSTA, unannounced, and shall be budgeted for. These drills typically pause work for ~ 1 hour and are not to be considered delays.

· Supplies including:

· Safety (PPE) – Type II Safety helmet with chin strap, safety glasses, reflective clothing (Class II), safety toe boots above the ankle, cap lamps, and hearing protection

· Small Tools and Supplies (STS)

· All tools shall be tethered for work within the shaft.

· Self Rescuers - OCENCO M20.2 must be carried by all underground staff when accessing the underground facilities. OCENCO escape breathing apparatus EBA-75 one-hour units shall be cached underground or in the shaft for each worker for emergency response purposes. These are all to be provided and maintained by the Subcontractor.

· Air Monitors – Industrial Scientific Mx6 gas monitors with O2, CO, LEL< and NO2 sensors are required to be carried by each guide; Subcontractor responsible for their own maintenance and calibration. Appendix 3 describes guides.

· Fall Protection and Working at Heights Permit for fall hazards greater than four feet.

Deliverables Subcontractor’s Deliverables The Subcontractor shall provide the following deliverables in accordance with the format for documents deliverables provided in Section 5.2.

Format for Documentation and Deliverables The Subcontractor will be required to use Construction Management and Documentation Software called “Procore”. This software will be used for all Subcontractor Submittals, RFI’s, Transmittals, Change Orders, Non-Conformance Reports as well as General correspondence.

Electronic distribution will be the standard method of transmitting all deliverables. All contract documents are to be identified by contract number and provided in a searchable PDF format.

Reports and other narrative documents are to have a cover sheet stating the document number, document title, use date, and subcontract number, as well as having a place to identify authors, checker, and approval signatures as required.

All reports and narrative documents are to begin with an executive summary briefly describing the contents and conclusions of the document.

Periodic Communication Progress meetings between FermiForward and the Subcontractor will be conducted weekly either in-person and/or via tele/video conference. These meetings will be held at scheduled times and locations mutually agreed to. The meetings shall include discussions of the Subcontractor’s progress, potential problems, resources, technical and contractual issues. The Subcontractor shall produce and distribute meeting minutes, assigned actions and associated project management documents within three (3) working days of each meeting. The parties shall forward any comments within five (5) working days of receipt of the minutes.

The Subcontractor shall maintain a list of open action items assigned, identifying action to be taken, the responsible party and the date the action must be completed.

Monthly progress reports shall be submitted throughout the contract period. Monthly reports and schedule updates shall be submitted on the 20th day (or the first business day after that date) of each month. Monthly reports shall address the following during the reporting period:

· Main schedule tasks and milestones

· Progress, results, achievements and issues encountered

· Safety challenges and successes

· Scheduled tasks for the next reporting period

· Outstanding issues and action items

· Percent complete per task through reporting period

· Variance explanation and corrective actions

· Anticipated variance in cost or schedule associated with added scope or issues encountered

Transportation The Subcontractor is responsible for packaging, storage, and loading, of all material and equipment covered by this SOW. Transportation of material and equipment from Subcontractor’s facility to its final destination at SURF is part of the scope of this statement of work.

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