Statement of Work for Master Substation Annex Construction

For the Critical Utilities Infrastructure Revitalization (CUIR)

Subproject 1 – Critical Electrical System Improvements

Project # 20-SC-79 at

SLAC National Accelerator Laboratory

October 2026

CUIR-SW-0203

DRAFT

CUIR Statement of Work Document Title: CUIR SOW for Master Substation

Annex (B017S) Construction Document Number: CUIR-SW-0203 Page 2 of 29

Informed Date: October 12, 2026

Brendan Curran – SLAC Facilities and Operations Director Ted Price – Systems Engineering Manager

J.E.R. Honeycutt – CUIR Construction Manager

Diego Regalado Baez – MSS Building Manager

Revision History

Revision Date Released Description of Change

R0 TBD Original Release.

Document Approval:

Originator: Jase Perez – CUIR Project Manager

• Content • Project Scope • General Requirements • Schedule • Facts Reviewer: Kelsy Westendorf – CUIR Subproject 1 Manager

• Complete/Accurate • Scope Alignment •Adherence to Project Specifications

Reviewer: Amy Ancheta – CUIR Design Manager

• Project Scope • Technical Requirements

Reviewer: Keith Jobe – SLAC Electrical Safety Officer

• Electrical Systems Safety • Lockout Tagout

Reviewer: Chris Mendez – CUIR Quality Assurance Manager (QAM)

• General QA Provisions

Reviewer: Greg Johnson – CUIR ES&H Coordinator

• General ES&H requirements

Approver: Tracy Ng – CUIR Project Director

• Final Authorization

Document Number: CUIR-SW-0203 Page 3 of 29

Table of Contents

1 CUIR Project Overview

1.1 Overview of the Critical Utilities Infrastructure Revitalization (CUIR) Project

2 Project Scope

2.1 Scope Overview and General Intent

2.2 Master Substation Annex

2.3 Project Interfaces

2.4 Success Factors

2.5 Temporary Power Provisions

2.6 Construction Submittals and Permits

2.7 As-Built Documentation

2.8 Construction Coordination

2.9 Government Furnished Property

3 Anticipated Schedule

3.1 Overall Project Schedule

4 Coordination, Execution, and General Requirements

4.1 Environment, Safety, and Health

4.2 Lock Out Tag Out (LOTO)

4.3 Electrical Hazards

4.4 Excavations

4.5 Existing Equipment

4.6 Vibration Protection

4.7 Environmental Protection and Compliance

4.8 Air Quality Program

4.9 Bay Area Air District Asbestos Notification

4.10 Rental Engines: Portable Engine Registration Program (PERP)

4.12 Contaminated Soil

4.13 Known Environmental Safety Risks

5 Quality Assurance Prescriptive Language

Document Number: CUIR-SW-0203 Page 4 of 29

6 Project Closeout

7 References

8 Acronyms 23

Appendix B: Quality Assurance Program Requirements & Deliverables Checklist

Document Number: CUIR-SW-0203 Page 5 of 29

1 CUIR Project Overview

1.1 Overview of the Critical Utilities Infrastructure Revitalization (CUIR) Project

Many of SLAC’s utilities were installed in the 1960s as part of the original laboratory construction. These original utilities were not designed to support the experimental parameters needed for scientific research today and in the future. The purpose of the Critical Utilities Infrastructure Revitalization (CUIR) project is to modernize the utility infrastructure to ensure reliable utilities for the laboratory and its accelerators.

CUIR is directly funded by the DOE's Office of Science. The project is organized into three subprojects to efficiently execute utility improvements in alignment with lab priorities and operational downtime schedules. This Statement of Work is prepared for the Master Substation Annex, which will be executed as part of the first CUIR subproject, Subproject 1 – Critical Electrical System Improvements.

2 Project Scope

2.1 Scope Overview and General Intent

The Subcontractor shall execute all work in accordance with the issued design documents, this Statement of Work, and applicable contract requirements. As SLAC is an active operating research facility, construction activities require careful planning, coordination with operations personnel, and proactive communication with stakeholders. Existing equipment, utilities, and operational systems must be protected throughout construction to prevent impacts to ongoing operations. Deviations from approved work plans without prior notice will not be permitted. The Subcontractor shall maintain contingency plans, including standby power capabilities as needed, to minimize disruptions resulting from unforeseen construction challenges. Close coordination with the CUIR project team is essential for successful project execution.

2.2 Master Substation Annex

The scope consists of constructing a new Master Substation Building (B017S) to accommodate the new medium voltage switchgear (designated as Bus 8 and Bus 9) and performing all associated construction activities, including relocation of an existing generator, replacement of an existing 12.47kV-480V substation, K-15B (new substation is 017S), construction of new busways, and connection to required electrical components in the existing B016. The issued design documents in accordance with this statement of work establish the basis of construction for this scope.

The existing B016 building serves as the control center for the electrical power system at SLAC and must remain functional throughout construction. The Subcontractor shall execute the work in a manner that preserves building operations, protects existing systems and equipment, and limits electric power service interruptions to the rest of the laboratory.

Document Number: CUIR-SW-0203 Page 6 of 29

The minimum PPE requirement for entry into the MSS Yard: Hard Hat Type E Rating, Safety Glasses, Long sleeve shirt & Long pants of untreated natural fibers (Non-Melting) or FR / Arc Rated and Leather shoes, No Vest unless it is FR rated.

Construction activities will occur in close proximity to energized medium- and high-voltage electrical equipment and existing power distribution infrastructure within the Master Substation. The work may also require modification, drilling, or doweling into existing structures that contain environmental hazards, including lead-based paint and asbestos-containing materials. Accordingly, the Subcontractor shall perform all work in compliance and a manner that prioritizes all applicable safety and environmental protection requirements. The Subcontractor's scope of work includes, but is not limited to, the following:

• Construct a new building adjacent to the existing Master Substation Building 016 to house the new medium-voltage switchgear designated as Bus 8 and Bus 9.

• Relocate the existing generator

• Remove the existing substation (Substation K-15B) located in the northwest corner of the Master Substation yard

• Supply and install new Substation B017S as the replacement for Substation K-15B.

• Install and connect the new switchgear provided by SLAC as Government Furnished Property.

Refer to Section 2.9 – Government Furnished Property.

• Supply and install the new busway connecting existing Bus 1 to new Bus 8, including the main breaker and new Q1 breaker to Power Factor Compensation System #1 (PFC-1)..

• Supply and install the new busway connecting existing Bus 2 to new Bus 9, including the main breaker and new Q2 breaker to Power Factor Compensation System #2 (PFC-2).

• Supply and install the new busway connecting the Bus 8 and Bus 9 tie breakers.

• Provide deferred submittals for Hydrogen Gas Detection systems, steel stairs, and railing systems required by contract drawings.

• Reconnect feeder cables CUIR1 through CUIR4 from the existing master substation to the new medium-voltage switchgear Bus 8 and Bus 9 in the new expansion building, including any additional feeder cable needed to allow splicing. SLAC may provide cables if Subcontractor does not procure cable, however Subcontractor will remain responsible for inspection and testing of cable prior to installation. Refer to Section 2.9 – Government Furnished Property.

2.3 Project Interfaces

The Subcontractor shall be aware that multiple SLAC projects may be active in and around the MSS Yard during the execution of this work between April 2027 to September 2028, including work associated with the CUIR program and other site infrastructure upgrades. Construction activities, staging areas, equipment storage, temporary facilities, and project interfaces may overlap or occur in close proximity to

Document Number: CUIR-SW-0203 Page 7 of 29 the MSS Annex work. The Subcontractor is expected to coordinate closely with SLAC and neighboring project teams to manage physical interfaces, site logistics, and access requirements, ensuring safe and efficient execution of all concurrent work. A collaborative approach to planning and communication will be required to minimize disruptions and support the successful delivery of all affected projects.

Projects working in proximity of the MSS Annex are:

• Reactive Power Compensation (RPC) – Demolition of B308 and B311 and removal of the existing synchronous Condenser is planned to be completed by Dec 2026 and prior to the mobilization and start of this MSS Annex scope of work. The RPC project is planned to begin construction to install its major equipment within the MSS Yard in October 2027 after a majority of the MSS Annex exterior building shell is complete.

• CUIR SP1 – Package C 230kV Transformer Replacement – Replacement of the T1 Transformer located outside and south of B016 and SE of the Annex, is planned to begin February 2028.

2.4 Success Factors

The success of the Master Substation Annex will be measured using the following factors:

• Safety: Ensuring the project is safe to both construct and operate.

• Cost: Achieve the project requirements at the lowest practical cost.

• Stakeholder Impacts: Construct the project with the lowest impacts to ongoing SLAC operations and other ongoing construction projects.

• Schedule: Construct the Annex and commission the electrical improvements in accordance with the baselined schedule in the most expedient manner and in compliance with SLAC safety requirements.

2.5 Temporary Power Provisions

This scope of work will require temporary power provisions. Any temporary generator power sustaining operational loads will need to demonstrate a high level of reliability and operate on a 24/7 schedule.

Power requirements can be found in the Subproject 1 Outage Plan . The Subcontractor shall submit a Temporary Power Plan that describes the temporary power configuration, technical specifications, generator sizing, fuel strategy, reliability provisions, and work plan. The final Temporary Power Plan must be reviewed and approved by SLAC before the Subcontractor is allowed to start the affected construction activities.

The generators shall:

• Have documented maintenance records to date to ensure they are in good, reliable condition at time of delivery.

Document Number: CUIR-SW-0203 Page 8 of 29

• Operate on either conventional diesel fuel or renewable diesel (R100, R99, RDB5 or other ASTM D975 approved designation). This includes operation with the California state-required addition of trace quantities of biodiesel with either the conventional or renewable fuel.

• Have internal or external load banks to prevent underloading and generator failures due to improper DEF consumption when underloaded.

• Be provided with containment for leaks and spills.

• The temporary generator with temporary wiring (including remote start) shall be provided during period of relocation of existing generator

Refer to Section 4.9 BAAQMC Asbestos Notification for additional requirements in relation to BAAQMD.

The Subcontractor shall:

• Provide a generator location map.

• Provide a continuous maintenance service and schedule for all generators throughout the duration of the subcontract.

• Provide that service technicians respond to failed or error conditions on affected generators within 60 minutes. The service technicians must be escorted onsite by the Subcontractor, in coordination with SLAC electricians.

• Provide fueling service. The frequency will depend on generator size and use. Due to the 24/7 power needs, 120 hours minimum storage per system at expected full operational load is required. Tank should be refilled no later than 72 hours before it runs out of fuel. The fueling service technicians must be escorted onsite by the Subcontractor.

• Perform operational and fueling checks three times a day. Provide schedule and documentation of the daily checks.

• Be responsible for cleaning up any spills or leaks from the generators and report incidents to SLAC promptly.

Onsite spare generators:

• Onsite spare generators shall be provided by the Subcontractor for each generator size.

• Ideally, generators shall be hooked up in a hot spare configuration, except where the load is too small; the generator system will be configured and controlled in a lead/lag configuration. For mission critical infrastructure the connected generators to the system shall be N+1 for all loads, with an additional spare onsite (N+2 is alternately acceptable).

• A failed generator shall be replaced with an onsite spare within 1 to 2 hours to restore N+1 redundancy.

Whenever a failed generator is replaced by a spare, another spare generator shall be delivered to site within 24 hours.

Document Number: CUIR-SW-0203 Page 9 of 29

2.6 Construction Submittals and Permits

The Subcontractor shall prepare and transmit all construction-phase submittals required to execute the work, including product data, shop drawings, fabrication drawings, erection procedures, temporary works submittals, work plans, permits, inspection requests, testing procedures, and other documentation required by the contract documents. Construction submittals shall be sequenced to support procurement, permitting, outage coordination, and field execution without delaying the approved project schedule.

The Subcontractor shall provide SLAC access to a mutually agreed project management platform to manage RFIs, submittals, permits, and comment responses. For critical or stakeholder-sensitive work, the Subcontractor shall coordinate review meetings to resolve construction, outage, and permitting issues prior to execution and incorporate resulting actions into the work plans. SLAC and the Architect of Record and/or Engineer of Record shall be provided a minimum of 15 business days to review standard submittals, with longer durations as required for complex packages. The Subcontractor shall account for review durations in the project schedule and timely address all review comments and required revisions.

The SLAC Building Inspection Office (BIO) acts as the Authority Having Jurisdiction (AHJ) and issues construction permits. The Subcontractor shall support permit activities by preparing and submitting all deferred submittals, revisions, inspection requests, and responses required by BIO and the project team.

Review comments generated by BIO shall be addressed by the Subcontractor in a timely manner, and revised documents shall be resubmitted as required before the applicable work proceeds.

The Subcontractor shall comply with the issued specifications and shall provide any construction-generated procedures, manufacturer instructions, and supplemental technical information required to execute and verify the work. Refer to the Division 01 specifications for additional information and requirements, including in particular Division 01 specification sections 013119, 013300, and 013301.

2.7 As-Built Documentation

The Subcontractor shall field verify existing conditions prior to construction and shall not rely solely on record drawings provided in Section C06 of the RFP, which are provided for reference and shall be validated before affected work proceeds. Any discrepancies, conflicts, or deviations identified in the field shall be coordinated with SLAC for resolution. The Subcontractor shall maintain current construction redlines throughout the project and provide complete redline documentation at closeout in accordance with the contract requirements. The Engineer of Record will incorporate the approved redlines into the final as-built documents.

2.8 Construction Coordination

2.8.1 Schedule Requirements

The Subcontractor shall provide an initial construction schedule (baseline) and regular updates as detailed in Section 013200. Once the Subcontractor’s baseline schedule has been accepted by SLAC with agreeable milestones, any subsequent changes to cost or scheduled milestones must be approved by SLAC before implementation.

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2.8.2 Communications Plan

The Subcontractor is responsible for ensuring clear communication to enable efficient and effective project implementation. The Subcontractor shall develop a Communications Plan that defines the lines of communication for construction execution, outage coordination, inspections, commissioning, closeout, and issue escalation. The Communications Plan should include relevant sub-tier subcontractors, third-party inspectors, the Commissioning Agent, and applicable SLAC representatives, and it should be updated regularly.

2.8.3 Pull Planning System

To optimize collaboration and coordination between the SLAC project team and the Subcontractor’s team, the Subcontractor shall utilize the pull planning system and employ a qualified facilitator. An integrated and coordinated use of the reliable production plan based on the pull planning system and conventional Critical Path Method (CPM) scheduling is required. SLAC expects the Subcontractor to have experience at all levels of planning and scheduling using these systems. The Subcontractor will be expected to host pull plan sessions at regular intervals throughout the course of the project to ensure project milestones are met.

2.8.4 Commissioning, Close-out, and Transition to Operations

The Subcontractor is responsible for coordination of systems commissioning (Cx) with the SLAC commissioning agent (CxA). The Subcontractor shall ensure the systems are ready to commission via checklists and shall coordinate the schedule with the CxA in advance. Regular Cx meetings will be established by the SLAC Facilities and Operations (F&O) Division with the CxA and the Subcontractor.

All Cx activities shall include SLAC F&O involvement. Refer to Specification 019113 for additional information.

Operations & maintenance (O&M) equipment, materials, and finishes manuals shall be provided by the Subcontractor in advance of the implementation of the commissioning effort. The manuals will be used by both the CxA and SLAC F&O personnel to evaluate and understand the systems as well as aid in commissioning development, review, and sign-off efforts.

The Subcontractor must provide all required training to SLAC F&O personnel on the various systems as part of the transition to operations effort. The O&M manuals will be required in advance of F&O training.

The Subcontractor shall provide all required closeout documentation to SLAC F&O personnel to include O&M manuals, warranties, certifications, structural calculations, shop drawings, fire systems drawings (as applicable), lock-out tag-out procedures (as applicable), redline drawings, and as-built drawings (noted above in section 2.7).

2.9 Government Furnished Property

SLAC will provide two new medium-voltage switchgear units as Government Furnished Property (GFP) for installation. Early procurement of this equipment by SLAC allows the Subcontractor to have better control of the schedule by reducing the risk of delays associated with supply chain constraints. The GFP

Document Number: CUIR-SW-0203 Page 11 of 29 provided has already been manufactured and is currently being stored offsite. The Subcontractor shall coordinate with SLAC for delivery and acceptance of the equipment. Subcontractor will be responsible for offloading GFP and setting in the final installation location. Additional equipment or parts necessary to complete the awarded scope will be supplied and installed by the Subcontractor as required by the contract documents.

Anticipated arrival date of the switchgears are shown in Section H - Government Furnished Property.

Actual arrival date to be coordinated with Subcontractor when Subcontractor is ready to receive and set equipment.

Responsibilities between the Subcontractor and SLAC are set out in the Long Lead Equipment Storage Plan.

3 Anticipated Schedule

3.1 Overall Project Schedule

The overall project schedule presented in this section reflects preliminary planning-level forecasts available to the project team as of November 2026.

The Subcontractor shall review the Major Milestone dates and the Subproject 1 Outage Plan and submit a preliminary construction schedule with its technical proposal. Any proposed deviations from the identified milestones, outage dates, or durations must be clearly documented, including revised completion dates, and will be considered during the technical evaluation process. Following contract award, the Subcontractor shall provide a baseline schedule that aligns as closely as possible with the negotiated outage timeline and durations. Any schedule reductions or extensions will require review and approval by SLAC stakeholders, and the baseline schedule should account for the necessary review period. The Subcontractor is expected to actively participate in stakeholder coordination The baseline schedule presented by the Subcontractor shall be approved by SLAC prior to commencement of work.

Table 1. Project Milestones

Milestone Key Activities Planned Date

1 Subcontract Award Estimated March 2027

2 Notice to Proceed 2 weeks after Milestone 1

3 Start Mobilization and Construction 1 month after Milestone 2

4 Complete Building Construction 12 months after Milestone 3

5 Commissioning Complete, Transition to Operations, Final Acceptance Estimated June 2028

6 Site Clean Up & Project Closeout Estimated July 2028

Document Number: CUIR-SW-0203 Page 12 of 29

4 Coordination, Execution, and General Requirements

The Subcontractor shall refer to the Terms and Conditions and to the general requirements specified in the Division 01 Specification. In addition, coordination and execution requirements are identified in the Preliminary Design Report (PDR). This section intends to highlight project requirements unique to the planned scope that should be addressed in the technical proposal. Requirements specified in the Division 01 Specifications are the governing document if there are any conflicting statements with this

SOW.

4.1 Environment, Safety, and Health

SLAC's core values—excellence, integrity, collaboration, respect, and creativity—should be reflected in the Subcontractor's approach. This includes balancing safety, quality, and schedule by planning the project to ensure high-quality work and adherence to safety protocols while meeting deadlines.

1. Safety is a top priority for all work conducted at SLAC. The goal is to eliminate safety risks to ensure no one is injured or misses work due to a work-related incident. The Subcontractor and all sub-tier subcontractors are expected to lead by example, promoting and implementing a robust safety and health program to maintain a safe work environment. Safety must be a key consideration in all aspects of work planning and execution.

2. Safety should never be compromised to meet a project's schedule or quality requirements. All necessary precautions must be taken to protect people and property. Any safety incidents could shut down the project as well as science operations at SLAC.

Quality should not be sacrificed to meet schedule demands. Rushing through tasks to save time can lead to defects, rework, and unsafe working conditions.

Report incidents or near misses immediately to SLAC personnel and provide investigations and reports per safety communication plans.

All work performed by the Subcontractor and its sub-tier subcontractors shall be done in accordance with the applicable Federal, State, and local safety and environmental laws, codes, standards, and regulations. Additionally, the Subcontractor and all sub-tier subcontractors shall perform work under this contract in accordance with Chapter 42 of SLAC’s ESH Manual[1], this Statement of Work, and provisions within the Division 01 specifications. Refer to the terms and conditions of this subcontract and the Division 01 specifications for additional details.

Subcontractors are required to incorporate the elements of SLAC’s Integrated Safety and Environmental Management System (ISEMS) and Work Planning and Control (WPC) The subcontractor must apply the core ISEMS functions in a continuous cycle throughout their work activities.

https://www-group.slac.stanford.edu/esh/general/subcontractor/

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SLAC’s WPC program builds on the standard ISEMS framework by integrating the concepts of authorization and release into the process. The combined SLAC ISEMS elements, along with the added WPC steps, are as follows:

• Define the work. Create or interpret drawings and specifications, statements of work, and project requirements, identify resources needed, create specific tasks/steps, set requirements, and expectations, and identify and prioritize tasks.

• Identify and analyze the hazards. Identify, analyze, and categorize hazards and potential environmental, safety, and health impacts associated with the work.

• Develop and implement controls. Identify and agree upon standards and requirements, identify controls to prevent/mitigate hazards, establish the ESH parameters, and implement controls.

• Authorize work. Affirmation by a supervisor that a worker is trained and qualified and has been informed of the hazards and controls of activities he or she has been assigned.

• Release work. Acknowledgement that proposed work activities: do not interfere with programmatic or conventional facilities; have been coordinated with adjacent building/area managers, as appropriate; affected occupants have been informed of potential disruption or inconvenience; worker(s) have been informed of unique hazards, controls, or limitations of the area; any boundary conditions have been communicated (see also Authorization).

• Perform work within controls. Confirm readiness and perform work safely and in the prescribed manner to protect workers, the public, and the environment.

• Feedback and continuous improvement. Gather feedback on the adequacy of controls from workers and appropriate stakeholders, identify and implement opportunities for improvement, and conduct line management and independent oversight. At SLAC, WPC is how ISEMS is implemented for all work performed. All work must first be planned, then authorized, and finally released. All subcontractors, at any level, will follow SLAC’s WPC program. WPC is the use of formal, documented processes for identifying and mitigating risks when planning, authorizing, releasing, and performing work. WPC is used to identify the hazards associated with the work activities outlined in the IIPP and manage those hazards. WPC ensures the ISEMS elements are incorporated in the plans, permits, and other documents needed for each definable work activity.

The Subcontractor shall incorporate the SLAC Construction Safety Requirements Manual[2] (CSRM) into all work activities conducted at SLAC. Furthermore, the Subcontractor shall impose the CSRM requirements on all levels of sub-tier subcontractors under this subcontract.

Issuance of badges is required for the Subcontractor to perform work at SLAC. Mandatory safety training courses required to obtain badges will be provided by SLAC online upon registration. Each person shall obtain an individual SLAC badge prior to working onsite. Proof of training completion

DRAFT

https://www-group.slac.stanford.edu/esh/documents/ConstructionSafetyRequirementsManual.pdf https://slac.sharepoint.com/sites/pub/Publications/Forms/Legacy%20View.aspx?id=%2Fsites%2Fpub%2FPublications%2FESH%20Construction%20Safety%20Requirements%20Manual.pdf&parent=%2Fsites%2Fpub%2FPublications

Document Number: CUIR-SW-0203 Page 14 of 29 should be presented by the Subcontractor to the SLAC Security and Emergency Management Department for issuance of badges.

• All workers shall complete SLAC safety training course 375 (Construction Safety Orientation).

This course takes 1 hour to complete.

• In addition to the above training, FAC101 - Subcontractor Safety Management Training is mandatory for Subcontractor field supervisors/superintendents and foremen working on a SLAC construction project. This training requires three hours to complete.

• Due to an energized active 230kV substation and exposed lines and equipment, Qualifications of non-electrical construction workers and/or briefings/instruction to pass through or navigate within the yard shall be reviewed and conducted by the Subcontractor, along with SLAC CM, the area manager and ESH to ensure work is performed safely. The Subcontractor shall monitor the workers training to ensure safety programs are adhered to for exposure to live systems.

The Subcontractor is responsible for providing additional training pertaining to work activities listed in the Work Classification Form (e.g., LOTO, electrical hazards, etc.). SLAC is responsible for recording and managing all required and completed training. Mandatory training for badging will be recorded via the SLAC Training Assignment (STA) system. Additional required training will be included in the construction Work Planning and Control binder that is maintained at the work location and managed by the SLAC

CM.

All materials provided under this subcontract shall meet federal, state, and local regulations, including specifically, primers, waterproofing membranes, and cove base adhesive. Topcoat, caulk, sealants, epoxy, adhesives, and paint must meet VOC limits established by the Bay Area Air District. Product specifications or Safety Data Sheets must be reviewed and approved by the SLAC Air Quality Program Manager prior to use. If the materials are not purchased through SLAC's Chemical Management Services (CMS), quantities of these materials used in this project must be tracked and submitted to the SLAC Air Quality Program Manager by the 5th of the month for the previous month. The Subcontractor must coordinate with the SLAC CM on the use of these materials in advance.

SLAC may require additional documentation of the Subcontractor’s safety program and specific documents depending on the phase and hazards associated with the project. Required documentation is described in the CSRM. Due to the distributed and varied nature of the planned scopes, more than one Site Specific Safety Plan (SSSP) may be required. The Subcontractor should consider the effort and time needed to ensure all work plans are approved prior to the start of work. SLAC will not authorize and release work without proper documentation.

4.2 Lock Out Tag Out (LOTO)

This project will require extensive lock out tag out (LOTO) for the control of energized sources. The SLAC process for switching operations requires qualified SLAC personnel to coordinate with the Subcontractor

Document Number: CUIR-SW-0203 Page 15 of 29 when performing switching operations as outlined in Division 1 and Division 26 Specifications, the Construction Safety Requirements Manual, and SLAC’s ES&H Manual Chapter 51.

The Subcontractor is responsible for the Lockout/Tagout Program for their qualified electrical workers and other workers exposed to hazards controlled by LOTO in compliance with the requirements of NFPA 70E-2027 and SLAC’s ES&H Manual Chapter 51.

SLAC-authorized personnel will provide the operation of energized systems including providing LOTO services. The Subcontractor will put their LOTO on after a LOTO is performed by SLAC electricians and remove their LOTO before SLAC electricians remove their LOTO. The Subcontractor shall make sufficient planning and scheduling including meeting all prerequisites for de-energization and energization.

The Subcontractor is responsible for ensuring compliance with LOTO provisions detailed in Chapter 51 of the ESH manual. The requirements for the Control of Hazardous Energy through the application of LOTO applies to all applicable energy sources and are not specific to electrical hazards.

4.3 Electrical Hazards

The Subcontractor should be aware that the Master Substation B016 and it’s Yard is filled with existing electrical equipment, some of which is energized all of the time. Existing loads fed from existing substation K15B shall be temporarily connected and fed from a SLAC-owned and provided portable 12.47kV-480Y/277V substation. This portable substation will be fed from one of the existing spare circuit breakers in B016. The existing standby generator shall be relocated and a temporary generator installed in its place during the relocation.

Before working with exposed conductors, the Subcontractor shall carry out thorough onsite examinations of the systems and plan and document work carefully. Workers must follow lock-out-tag-out and zero-voltage verification procedures before starting work.

Refer to Division 26 specifications for more information.

Protective covers or barriers shall be erected where appropriate to ensure against damage to existing equipment.

Work will involve working under 230 kV power transmission lines and high power transformers. Adequate planning needs to be performed to ensure work can be safely performed in this environment.

Due to clearance restrictions associated with the energized 230 kV overhead power lines in the MSS yard, large or tall vehicles and cranes that do not meet clearance requirements are prohibited from entering the area beneath or between the incoming lines. Equipment operating in or passing through this zone must remain within a maximum overall envelope of 20 feet wide by 11 feet high to maintain the required safe clearance from energized components. This envelope maintains a clearance distance of 20 feet from the energized lines and exposed parts within the yard.

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Additional delineation of stay-clear areas shall be implemented by SLAC to provide clear understanding of distances from energized lines and equipment. The Subcontractor shall provide their own or additional delineation as per their safety programs.

Steel plates are required to be placed over traffic areas in the yard where heavy equipment may be crossing. See sketch RPC-DEMO_Metal Plates Location_SKETCH_08.12.2026.

4.4 Excavations

All subcontractor excavation activities must be conducted in accordance with state, federal, and local regulatory requirements. Excavation begins when the ground, surface, at-grade material, or other material is removed from an area or building. All subcontractor excavation activities must adhere to the SLAC ESH Manual Chapter 11, in addition to California regulatory codes.

Subcontractors should be aware of the following SLAC-specific requirements and refer to SLAC ESH Manual Chapter 11 for details.

Excavation Permit A SLAC excavation permit is required when any of the following conditions are met:

• Excavation (digging or drilling) extends to a depth of one foot or more.

• Power tools are used during the excavation process.

• Utilities are identified or suspected in the excavation area.

• There is a likelihood of encountering any hazardous conditions.

Utility Locating and Potholing Verification When conducting utility locating and pothole verification, the subcontractor must consider the following:

• Use non-invasive methods, hand-dig, or use specialized equipment (e.g., vacuum excavators) within 18 inches plus the diameter of the utility(exclusion zone).

• Maintain utility markings in the field and during excavation; use flags if needed.

• Utility location survey should extend at least three feet beyond excavation boundaries.

• Inform SLAC when findings deviate from SLAC as-built drawings by submitting deviations with the excavation permit.

Excavation Plan For any excavation five feet or deeper, a written excavation plan must be developed. This plan must include methods for utility identification, shoring, spoil management, equipment placement, egress, Document Number: CUIR-SW-0203 Page 17 of 29 and fall protection. Excavation Plans deviating from pre-engineered standards or exceeding 20 feet in depth must be stamped by a California-registered civil/structural engineer.

The subcontractor is responsible for:

• Obtaining SLAC excavation permits.

• Preparing and implementing the approved excavation plan.

• Stop work if unexpected conditions arise.

• Coordinating a pre-mobilization meeting with SLAC.

• Conducting daily inspections of excavation, trenching, and shoring.

• Designating a competent person with the authority to enforce compliance.

• Communicating and enforcing excavation requirements to lower-tier subcontractors.

• Report incidents or near misses immediately to SLAC personnel and provide investigations and reports per safety communication plans.

• Grade and level B015 entry access, provide temporary fencing for work area and staging zone.

After scope completion, restore area to original conditions.

Refer to Section 4.12 for soil characterization and handling requirements.

4.5 Existing Equipment

This project requires working in an operational facility and around existing equipment. The Subcontractor shall ensure that existing equipment and facilities are protected during construction. In case of damage, the Subcontractor is responsible for rectification, repair, or replacement, to be determined by SLAC.

The Subcontractor shall demonstrate thorough work planning that existing equipment will be protected during construction. Temporary or permanent relocation of any existing equipment will require coordination with lab stakeholders. The Subcontractor shall assist in providing adequate assurance to stakeholders that any relocation of existing equipment will not adversely affect ongoing operations or that impacts will be minimized.

4.6 Vibration Protection

The Klystron Gallery and underlying accelerator tunnel, located approximately 45 feet from the project area, are vibration-sensitive facilities critical to SLAC operations. While vibrations generated by existing 200-hp pump motors do not adversely impact science operations and most routine construction activities are not expected to exceed these levels, any work anticipated to generate greater ground vibrations shall be evaluated and mitigated accordingly. The Subcontractor shall notify the SLAC Project Team as early

Document Number: CUIR-SW-0203 Page 18 of 29 as possible of any vibration-generating activities to allow for user notification, coordination, and scheduling during accelerator downtimes if required.

4.7 Environmental Protection and Compliance

To consider potential environmental impacts of the proposed construction scope and actions, The CUIR project has completed DOE-approved NEPA review under Categorical Exclusion SS-SC-21-02. The Subcontractor shall comply with all applicable environmental requirements, including SLAC Division 1 Specifications, ESH Manual Chapter 26 (Stormwater), the site-wide Stormwater Pollution Prevention Plan (SWPPP), associated Best Management Practices (BMPs), and applicable federal, state, and local regulations. Projects disturbing less than one acre shall develop and implement an erosion and sediment control plan, and copies of the SWPPP are available upon request. Failure to comply with SWPPP requirements may result in regulatory enforcement and penalties under the Clean Water Act. Refer to SLAC Specification 01 35 43 for additional requirements.

4.8 Air Quality Program

To support Scope 1-1, the existing emergency diesel engine (SBG-016), which operates under an existing Bay Area Air District permit, must be relocated. Relocations exceeding 100 feet may require a permit modification; therefore, the Subcontractor shall coordinate with SLAC's Air Quality Program Manager and allow sufficient time for permit processing, which can take 6 to 9 months or longer.

4.9 Bay Area Air District Asbestos Notification

The following requires an asbestos permit and a 10-day notification period to the Bay Area Air District :

• Wrecking, dismantling, or moving any load-supporting structural member of a building, including cutting, disjointing, stripping, or removal of structural elements of buildings or trailers, regardless of if there is asbestos present.

• Removal of asbestos-containing material (friable or non-friable: Category I and II) in excess of 100 linear feet, 100 sq. feet, or 35 cubic feet per project.

Coordinate any Bay Area Air District asbestos permit applications and notifications with SLAC’s Air Quality Program Manager for review, submittal, and tracking.

4.10 Rental Engines: Portable Engine Registration Program (PERP)

Temporary power will be required for some portions of this project. Rental diesel engines (>50 hp) are limited to a maximum duration of use of 12 months at a project location. PERP Registration terms and conditions must be provided to SLAC’s Air Quality Program Manager at least 5 days prior to the engine arriving onsite, along with an estimate of the duration of the use of the engine for that project.

4.12 Contaminated Soil

The Subcontractor shall apply for SLAC-issued excavation permits prior to initiating any excavation work.

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An excavation permit for for Scope 1-1 will be required.

Soil sampling conducted by EKI Environment & Water, Inc. determined that excavated soil from the Building 016 expansion area cannot be reused onsite due to low-level PCB detections (up to 0.14 mg/kg) in 7 of 9 shallow soil samples. The findings are included in Section C05. Total petroleum hydrocarbons (TPH) detections were consistent with background conditions and not indicative of a spill, while lead concentrations were within SLAC's naturally occurring background soil levels.

The excavated soil and overlying gravel are assumed to contain similar PCB concentrations and must be disposed of at a SLAC-approved offsite landfill authorized to accept this material. All waste characterization and disposal activities shall comply with SLAC Chemical and Waste Management Department requirements. The subcontractor shall be responsible for all off haul of non-hazardous waste, including soil off haul. This includes performing their own soil sampling, creating a profile with the offsite landfill for disposal, and providing bins and necessary secondary protection as required.

The Subcontractor should consult with the Chemical and Waste Management Department on a disposal plan prior to disposal. Details refer to technical specifications Section 013543 Environmental Procedures and Section 017419 – Construction Waste Management and Disposal.

4.13 Known Environmental Safety Risks

The Subcontractor should be aware of known environmental safety risks and hazards highlighted in this section. Additional environmental safety risks are expected on this project and the Subcontractor must perform a thorough assessment of the existing conditions and adhere to SLAC ES&H requirements.

4.13.1 Asbestos

Asbestos reports for the Master Substation will be provided. The roofing mastics and the fire doors at the Master Substation Building 016 are presumed to contain asbestos. Refer to Section 4.9 above on Bay Area Air District asbestos permit applications coordination and requirements.

4.13.2 Lead Paint

Master Substation Building lead paint testing results will be provided.

Building 016

The steel members of the Master Substation Building (B016) were analyzed for metallic lead in September 2023. Both types of painted steel beams presented in B016 were found to be free of lead at the limit of detection for the analysis.

• Fire-rated plastic sheeting: In areas where lead-based paint is likely to be disturbed by construction activities, existing equipment should be covered with fire retardant polyethylene sheeting with 6 mil. minimum thickness. This step is necessary to protect existing equipment from lead particles and dust.

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• Minimize lead hazards by preventing contamination, cleaning floors daily, and covering work areas with 2-3 layers of poly sheeting. Ensure trained workers and supervision are provided, along with required hygiene facilities, protective clothing, and regulated-area signage.

An approved lead work plan must be submitted prior to commencement of work. More requirements can be found in:

https://www.dir.ca.gov/dosh/dosh_publications/Lead-in-Construction-fs.pdf.

Adequate preventive measures such as laying/covering of poly sheeting prior to the start of activities demonstrated in the WPC would be considered by SLAC for work to be carried out.

4.13.3 Silica Dust

The walls of the Master Substation Building (B016) are constructed of concrete masonry units (CMU).

OSHA silica standard requirements shall be implemented when demolishing, cutting, drilling, or otherwise penetrating CMU surfaces.

The Subcontractor shall utilize wet methods and active local exhaust ventilation systems to control and capture dust at its source and shall maintain respirable crystalline silica exposure below OSHA's Permissible Exposure Limit (PEL) of 50 μg/m³ as an 8-hour time-weighted average.

Refer to Chapter 56 of the ESH Manual and applicable Cal/OSHA requirements for additional safety requirements related to dust-generating activities.5 Quality Assurance (QA) Requirements

The subcontractor is responsible for ensuring the quality of all their activities, including work performed by sub-tier subcontractors. The subcontractor shall ensure that all efforts conform to applicable codes, regulations, subcontract requirements, and the approved design and specifications.

The selected firm shall establish and maintain a Quality Management System (QMS) that is compliant with the requirements outlined in CUIR Quality Requirements for Subcontractors (CUIR-QA-0175);

Department of Energy (DOE) Order 414.1E Chg. 2, "Quality Assurance"; and the standards of a U.S.

industry-recognized Quality Management System (QMS) or program (e.g., ISO 9001).

The subcontractor shall adhere to the applicable quality requirements specified in CUIR’s Quality Requirements for Subcontractors (CUIR-QA-0175).

5 Quality Assurance Prescriptive Language

For the interpretation of documented requirements, the following verbal forms apply across all project documentation:

• “Shall,” “must,” and “will” indicate requirements;

• “Should” indicates a recommendation;

• “May” indicates a permission;

https://www.dir.ca.gov/dosh/dosh_publications/Lead-in-Construction-fs.pdf

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• “Can” indicates a possibility or capability.

6 Project Closeout

The Subcontractor shall perform all project closeout activities in accordance with the requirements specified in Division 01. This includes, but is not limited to, the submission of as-built drawings, O&M manuals, warranties, test reports, and final copies of all project documents. All turnover packages shall be submitted to and accepted by SLAC prior to final acceptance and contract closeout. The Subcontractor shall clean work areas before site demobilization and coordinate waste disposal with the

SLAC CM.

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7 References

Associated Document(s)

Reference Number

Document Title

Master Substation Annex Final Design Package

Master Substation Annex IFC Final Design Package documents

Commissioning Plan for Switchgears

CUIR-WPC-0114 CUIR Subproject 1 Power Outages and Linac Downtime Plan

CUIR-QA-0175 CUIR’s Quality Requirements for Subcontractors

Department of Energy (DOE) Order 414.1E Chg. 2, Quality Assurance

Space request 107 B015 Parking Lot – B016 Master Substation Yard Entrance Scope Document

RPC-DEMO_Metal Plates Location_SKETCH_08.12.2026

Document Number: CUIR-SW-0203 Page 23 of 29

8 Acronyms

Acronym Definition

AHJ Authority Having Jurisdiction

BAAQMD Bay Area Air Quality Management District

BIO Building Inspection Office

CM Construction Manager

CMS Chemical Management Services

CMU Concrete Masonry Units

CPM Critical Path Method

CSRM Construction Safety Requirements Manual

CUIR Critical Utilities Infrastructure Revitalization

Cx Commissioning

CxA Commissioning Agent

DOE Department of Energy

F&O Facilities and Operations

ES&H Environment, Safety, and Health

GFP Government Furnished Property

ISEMS Integrated Safety and Environmental Management System

LINAC Linear Accelerator

LLE Long Lead Equipment

LOTO Lock Out Tag Out

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Acronym Definition

MBTA Migratory Bird Treaty Act

MSS Master Substation

NEPA National Environmental Policy Act

O&M Operations & Maintenance

OSHA Occupational Safety and Health Administration

PCB Polychlorinated Biphenyls

PDR Preliminary Design Report

PEL Permissible Exposure Limit

PERP Portable Engine Registration Program

PFC Power Factor Compensation

QA Quality Assurance

QC Quality Control

RFP Request for Proposal

RPC Reactive Power Compensation

SLAC SLAC National Accelerator Laboratory

SSSP Site Specific Safety Plan

STA SLAC Training Assignment (System)

TPH Total Petroleum Hydrocarbons

WPC Work Planning and Control

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Appendix B: Quality Assurance Program Requirements & Deliverables Checklist

The Supplier Quality Assurance Program and Deliverables Requirements checklist is used to document, communicate, and confirm the specific quality assurance program requirements that a SUBCONTRACTOR/SUPPLIER must implement when providing items or services under a subcontract.

It ensures that all applicable quality clauses are clearly identified, and both the SUBCONTRACTOR/SUPPLIER and the CONTRACTOR have a mutual understanding of the expectations.

This form supports compliance with regulatory and contractual obligations, such as DOE Order 414.1E, and helps maintain traceability and accountability throughout the procurement process.

For additional guidance on requirements, SUBCONTRACTOR/SUPPLIER may reference ISO

9001:2015.

Statement of Work Number and Title (include Revision): Master Substation Annex (CUIR-SW-0203)

QA ID

Check if applicable:

QA-01A ☒ GENERAL QUALITY ASSURANCE PROGRAM REQUIREMENTS FOR

SUBCONTRACTOR IMPLEMENTED PROGRAM

QA-01B ☐ SUPPLEMENTARY CODES AND STANDARDS REQUIREMENTS

QA-01C ☐ SUPPLEMENTARY ISO/IEC-17025 CALIBRATION PROGRAM

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QA-02 ☒…