E Draft Stormwater Pollution Prevention Plan 1_2024.pdf

D R A F T f o r R F P P r o c e s s

Stormwater Pollution Prevention Plan

BUILDING 59 NERSC

FACILITY UPGRADE II

WDID # X XXXXXXXX

Prepared by:

Environment, Health, and Safety Division Environmental Services Group

January 2024

Lawrence Berkeley National Laboratory

Berkeley, CA 94720

This work was supported by the Director, Office of Science, U.S. Department of Energy under Contract Number DE- AC02-05CH11231 iii

Owner/Developer Certification of SWPPP

I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to ensure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine or imprisonment for knowing violations.

Legally Responsible Person’s (LRP) Signature

Maria Nappi

Date

510-486-6571 LRP’s Name

Environment / Health / Safety Division Director

Telephone Number ngnappi@lbl.gov

Qualified SWPPP Developer Certification

Project Name: BUILDING 59 NERSC FACILITY UPGRADE II

Project Number/ID: WDID # X XXXXXXX

“This Stormwater Pollution Prevention Plan and Attachments were prepared under my direction to meet the requirements of the California Construction General Permit Order 2022-0057-DWQ. I certify that I am a Qualified SWPPP Developer in good standing as of the date signed below.”

QSD Signature

Brendan J. Mulholland

Date

# 22274 QSD Name

Professional Geologist (PG), LBNL Environmental Water Quality Manager

QSD Certificate Number

510-381-5584

Title and Affiliation

BJMulholland@lbl.gov

Telephone Number

Email v

Legally Responsible Person Certification

Project Number/ID WDID # X XXXXXXX

“I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations. I am also aware that my user ID and password constitute my electronic signature and any information I indicate I am electronically certifying contains my signature. I understand that my electronic signature is the legal equivalent of my handwritten signature. My signature on this form certifies that my electronic signature is for my own use, that I will keep it confidential, and that I will not delegate or share it with any other person. Should I wish to delegate such authority, I will do so formally in writing and electronically notify the State Water Board using SMARTS of such delegation within 10 days of the delegation. I further certify that I will protect my electronic signature from unauthorized use, and that I will contact the State Water Board, within two business days of discovery, if I suspect that my electronic signature has been lost, stolen, or otherwise compromised.”

Maria Nappi

Division Director

LBNL Environment / Health /Safety Division

Name and Title of Legally Responsible Person

Signature of Legally Responsible Person Date

Jim Buehler Environmental Services Group Leader LBNL Environment / Health / Safety Division Name and Title of Duly Authorized Representative

Signature of Duly Authorized Representative Date vi

Review and Approval Signatures

Prepared and Certified by:

Date:

Brendan J. Mulholland, PG, QSD, QISP

Environmental Water Quality Manager LBNL Environment / Health / Safety Division

Reviewed and Approved by:

David Topete, Project Manager

LBNL Project & Infrastructure Modernization Division

(To Be Determined), Construction Manager

LBNL Project & Infrastructure Modernization Division vii

Contents

Owner/Developer Certification of SWPPP ............................................................................................... iii

Qualified SWPPP Developer Certification ............................................................................................... iv

Legally Responsible Person Certification ................................................................................................ v

Review and Approval Signatures ............................................................................................................. vi

Contents ..................................................................................................................................................... vii

Amendment Log ......................................................................................................................................... xi

Abbreviations and Acronyms .................................................................................................................. xii

1 Introduction ...................................................................................................................................... 1-1

1.1 Regulatory Requirements, SWPPP Preparation and Implementation ................................. 1-1

1.2 Notice of Intent and Permit Registration Documents ............................................................ 1-2

1.3 SWPPP Availability and Implementation .............................................................................. 1-2

1.4 SWPPP Amendments ........................................................................................................... 1-2

1.5 Retention of Records ............................................................................................................ 1-4

1.6 Non-Compliance Reporting................................................................................................... 1-5

1.7 Annual Report ....................................................................................................................... 1-6

1.8 Revising Permit Coverage Information ................................................................................. 1-6

1.9 Notice of Termination ............................................................................................................ 1-7

2 Project Information.......................................................................................................................... 2-1

2.1 Introduction ........................................................................................................................... 2-1

2.2 Project Site ............................................................................................................................ 2-1

2.3 Project Characteristics .......................................................................................................... 2-2

2.3.1 Existing and Proposed Stormwater Drainage ........................................................... 2-3

2.3.2 Geology and Hydrogeology ....................................................................................... 2-4

2.3.3 Site Preparation ......................................................................................................... 2-4

2.4 Stormwater Run-On from Offsite Areas ................................................................................ 2-4

2.5 Findings of the Construction Site Sediment and Receiving Water Risk Determination ....... 2-5

2.6 Project Activities and Construction Schedule ....................................................................... 2-6

2.6.1 Construction Access and Staging ............................................................................. 2-7

2.6.2 Site Grading, Soil Stockpiling, and Construction Traffic ............................................ 2-7

2.7 Potential Construction Site Pollutant Sources ...................................................................... 2-7

2.8 Identification of Non-Stormwater Discharges ....................................................................... 2-8

2.9 Required Site Map Information ............................................................................................. 2-8

3 Best Management Practices ........................................................................................................... 3-1

3.1 Schedule for BMP Implementation ....................................................................................... 3-1

3.2 Erosion and Sediment Control .............................................................................................. 3-1

3.2.1 Erosion Control .......................................................................................................... 3-1

3.2.2 Sediment Control ....................................................................................................... 3-3 viii

3.3 Non-Stormwater Control ....................................................................................................... 3-1

3.4 Waste Management and Materials Pollution Control ........................................................... 3-2

3.5 Post Construction Stormwater Management Measures ....................................................... 3-5

4 BMP Inspection and Maintenance ................................................................................................. 4-1

4.1 BMP Inspection and Maintenance ........................................................................................ 4-1

5 Training ............................................................................................................................................ 5-2

6 Responsible Parties and Project Team List ................................................................................. 6-1

6.1 Responsible Parties .............................................................................................................. 6-1

6.2 Project Team List .................................................................................................................. 6-2

7 Construction Site Monitoring Program ......................................................................................... 7-1

7.1 Purpose ................................................................................................................................. 7-1

7.2 Applicability of Permit Requirements .................................................................................... 7-1

7.3 Weather and Precipitation Event Tracking ........................................................................... 7-1

7.3.1 Weather Tracking ...................................................................................................... 7-2

7.3.2 Rain Gauge ............................................................................................................... 7-2

7.4 Monitoring Locations ............................................................................................................. 7-2

7.5 Safety and Monitoring Exemptions ....................................................................................... 7-2

7.6 Visual Monitoring .................................................................................................................. 7-3

7.6.1 Routine Observations and Inspections ...................................................................... 7-4

7.6.2 Qualifying Precipitation Event Triggered Observations and Inspections .................. 7-5

7.6.3 Visual Monitoring Procedures ................................................................................... 7-6

7.6.4 Visual Monitoring, Follow-Up, and Reporting ............................................................ 7-6

7.6.5 Visual Monitoring Locations....................................................................................... 7-7

7.7 Risk Level 2 Water Quality Sampling and Analysis .............................................................. 7-7

7.7.1 NAL Exceedance Report ........................................................................................... 7-7

7.7.2 Sampling and Analysis Plan for Non-visible Pollutants in Stormwater Runoff

Discharges ................................................................................................................. 7-8

7.7.3 Sampling and Analysis Plan for Other Pollutants Required by the Regional Water

Board ....................................................................................................................... 7-14

7.7.4 Training of Sampling Personnel .............................................................................. 7-15

7.7.5 Sample Collection and Handling ............................................................................. 7-15

7.8 Active Treatment System Monitoring .................................................................................. 7-17

7.9 Bio-assessment Monitoring................................................................................................. 7-17

7.10 Watershed Monitoring Option ............................................................................................. 7-17

7.11 Quality Assurance and Quality Control ............................................................................... 7-17

7.11.1 Field Logs ................................................................................................................ 7-18

7.11.2 Clean Sampling Techniques ................................................................................... 7-18

7.11.3 Chain of Custody ..................................................................................................... 7-18

7.11.4 QA/QC Samples ...................................................................................................... 7-18

7.11.5 Data Verification ...................................................................................................... 7-19 ix

7.12 Records Retention .............................................................................................................. 7-20

7.13 Change of Conditions ......................................................................................................... 7-21 CSMP Attachment 1: Weather Reports .......................................................................................... 7-22 CSMP Attachment 2: Monitoring Records ...................................................................................... 7-23 CSMP Attachment 3: Example Forms ............................................................................................ 7-24 CSMP Attachment 4: Field Meter Instructions ................................................................................ 7-30 CSMP Attachment 5: Supplemental Information ............................................................................ 7-31

8 References ....................................................................................................................................... 8-1

TABLES

Table 2-1 Summary of Sediment Risk ....................................................................................................... 2-6 Table 2-2 Summary of Receiving Water Risk ............................................................................................ 2-6 Table 2-3 Required Map Information ......................................................................................................... 2-9 Table 3-1 BMP Implementation Schedule ................................................................................................. 3-1 Table 3-2 Temporary Erosion Control BMPs ............................................................................................. 3-5 Table 3-3 Temporary Sediment Control BMPs .......................................................................................... 3-6 Table 3-4 Temporary Non-Stormwater BMP ............................................................................................. 3-3 Table 3-5 Temporary Waste Management and Materials Pollution Control BMPs ................................... 3-6 Table 7-1 Summary of Visual Monitoring and Inspections ........................................................................ 7-4 Table 7-2 Visual Monitoring Personnel ...................................................................................................... 7-6 Table 7-3 Potential Non-visible Pollutants and Water Quality Indicator Constituents ............................. 7-10 Table 7-4 Common Non-Visible Pollutants and Water Quality Indicator Constituents Worksheet .......... 7-11 Table 7-5 Sample Collection, Preservation, and Analysis for Monitoring Non-visible Pollutants ............ 7-13

FIGURES

Figure 1-1 Site Location Map ..................................................................................................................... 2-1

APPENDICES

Appendix A Risk Determination Calculation

Appendix B Site Vicinity Map and Water Pollution Control Drawings

Appendix C Permit Registration Documents

Appendix D SWPPP Amendment Certifications

Appendix E Notice of Non-Compliance

Appendix F Submitted Changes to PRDs

Appendix G SWPPP Amendments

Appendix H Construction Schedule

Appendix I Construction Activities, Materials Used and Associated Pollutants

Appendix J CASQA BMP Fact Sheets

Appendix K Construction General Permit and Other Plans x

Appendix L BMP Inspection Checklist

Appendix M Responsible Parties

Appendix N Trained Project Team Personnel Log

Appendix O Written Authorizations for Duly Authorized Representatives xi

Amendment Log

Project Number/ID: WDID # X XXXXXXXXX

Project’s QSD Signature: Date:

Amendment No. Date Brief Description of Amendment

(include section and page number) Prepared and Approved by:

Name:

QSD#

Note: All SWPPP Amendments shall be prepared by the Project Team’s QSD after consulting with LBNL’s

QSD.

xii

Abbreviations and Acronyms

ACHE Air Cooled Heat Exchanger BAT Best Available Technology BCT Best Control Technology bgs Below ground surface BMP Best Management Practice CASQA California Stormwater Quality Association CGP Construction General Permit CoC Chain of Custody CSMP Construction Site Monitoring Program DAR Duly Authorized Representative ECM Erosion control matting EISA Energy Independence and Security Act EPA Environmental Protection Agency LBNL Lawrence Berkeley National Laboratory (Berkeley Lab, the Lab) LRP Legally Responsible Person MGY Million Gallons per Year mg/kg milligrams per kilogram ml milliliter MW Megawatts NAL Numeric Action Levels NEL Numeric Effluent Limits NERSC National Energy Research Scientific Computing Center NOI Notice of Intent NOT Notice of Termination NPDES National Pollutant Discharge Elimination System PCB Polychlorinated Biphenyl PoP Probability of Precipitation PRD Permit Registration Documents QA/QC Quality Assurance/ Quality Control QPE Qualifying Precipitation Event QPF Quantitative Precipitation Forecast QAPrP Quality Assurance Program Plan QSD Qualified SWPPP Developer QSP Qualified SWPPP Practitioner RUSLE Revised Universal Soil Loss Equation RWQCB Regional Water Quality Control Board SDS Safety Data Sheets SFRWQCB San Francisco Bay Regional Water Quality Control Board SMARTS Stormwater Multiple Application and Report Tracking System SMP Soil Management Plan SWRCB California State Water Resources Control Board SWPPP Stormwater Pollution Prevention Plan SWAMP Surface Water Ambient Monitoring Program UC University of California VOC Volatile Organic Compounds xiii

WDID Waste Discharge Identification Number WPCD Water Pollution Control Drawing xiv

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1 Introduction

1.1 Regulatory Requirements, SWPPP Preparation and Implementation

Lawrence Berkeley National Laboratory’s (Berkeley Lab, The Lab) construction projects which are greater than one acre in size are regulated by the California State Water Resources Control Board (SWRCB, the Board) via the Board’s General Permit Order 2022-0057-DWQ (See Appendix K), Stormwater Discharges Associated with Construction and Land Disturbance Activities (Construction General Permit [CGP], the Permit).

This project-specific Building 59 NERSC Facility Upgrade II (the Project) Stormwater Pollution Prevention Plan (SWPPP), has been prepared by the Lab’s Qualified SWPPP Developer (QSD). The Lab’s QSD is also responsible for obtaining an active stormwater permit, managing all permit required documents (PRDs, see Section 1.2), and administering the project’s account on The Board’s Stormwater Multiple Application and Report Tracking System (SMARTS) database.

The Project’s costruction management team (the Project Team) will be responsible for implementing this SWPPP, including implementation of stormwater Best Management Practices (BMPs), and sampling and analysis of stormwater for potential pollutants as applied to the Project’s description, phases, and scopes of work. The Project Team’s Qualified SWPPP Practitioner (QSP) shall implement the SWPPP, and the Project Team’s QSD will revise the SWPPP in order to accurately reflect construction phase activity.

Per Permit Section IV.O, this SWPPP is designed to address the following:

• Identification of all pollutants, their sources, and control mechanisms, including sources of sediment associated with all construction activities (e.g., sediment, paint, cement, stucco, cleaners, site erosion);

• Pollutant source assessments, including a list of potential pollutant sources and identification of site areas where additional BMPs are necessary to reduce or prevent pollutants in stormwater and authorized non-stormwater discharges, per the minimum requirements when developing the pollutant source assessment;

• Description of site-specific BMPs implemented to reduce or eliminate stormwater pollution;

• Where not otherwise required to be under a Regional Water Quality Control Board (Regional Water Board) permit, all non-stormwater discharges are identified and either eliminated, controlled, or treated;

• Site BMPs are effective and result in the reduction or elimination of pollutants in stormwater discharges and authorized non-stormwater discharges from construction activity to the Best Available Technology/Best Control Technology (BAT/BCT) standard; and;

• Stabilization BMPs are installed to reduce or eliminate pollutants after construction is completed are effective and maintained;

• Calculations and design details, as well as BMP controls, are complete and correct.

Requirements Building 59 NERSC Facility Upgrade II

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1.2 Notice of Intent and Permit Registration Documents

The Notice of Intent (NOI) (see Appendix C) and the PRDs will be electronically submitted by the Lab to the SWRCB prior to commencement of construction activities in order to obtain coverage under the Permit.

The following PRDs are required for all projects:

• NOI

• Risk Assessment (Construction Site Sediment and Receiving Water Risk Determination)

• SWPPP

• Vicinity Map

• Annual Fee

• Signed Certification Statement

The PRDs will be submitted via SMARTS by The Lab’s Legally Responsible Person (LRP) or Duly Authorized Representative (DAR). A Waste Discharge Identification Number (WDID) will be issued upon submission and approval of the Project PRDs. The WDID printout confirmation letter will be included in Appendix C along with the PRDs for this Project.

1.3 SWPPP Availability and Implementation

The SWPPP will be available at the Project site during working hours (Section 7.5,) when construction is occurring and shall be made available upon request by a federal, state, or municipal inspector. A current copy of the site-specific SWPPP and any site inspection reports required by the Permit may be kept in electronic format at the Project site so long as the information requested by a federal, state, or municipal inspector can be made available during an inspection. Per Permit Section IV.O.1, legible maps in hard copy must be available at the Project site. The SWPPP must be implemented at the appropriate level to protect water quality at all times throughout the life of the Project. The SWPPP must remain on the site during construction activities, commencing with the initial mobilization and ending with the termination of Permit Coverage.

The SWPPP shall be implemented concurrently with the start of new ground disturbing activities, but not before issuance of a WDID.

1.4 SWPPP Amendments

Per Permit Section V.A.2, the Project’s SWPPP and any required amendments shall be prepared by a QSD.

The Project Team’s QSD shall prepare all SWPPP changes or amendments, and the Lab’s QSD shall upload amended documents to SMARTS within 30 calendar days after review and approval by the Lab’s Project Manager and QSD.

The SWPPP will be revised by the Project Team’s QSD when:

• There is a Permit violation (Section VI.Q.1);

• There is a reduction or increase in total disturbed acreage (Section III.F.2. and F.4). This scenario may occur as the Project area is developed. It is the intention of this SWPPP and the related

1-3 amendments to track construction phases as they start and are completed. This will ensure that each Project phase will be guided by this SWPPP, which has been prepared to meet the objectives and requirements of the Permit.

• BMPs are not effective and are not resulting in a reduction or elimination of pollutants in stormwater discharges and authorized non-stormwater discharges (Section VI.Q.1 and Attachment E Section

III.C.5);

• There is a change in the project duration that changes the project Risk Type (Section III.F.1);

• Dischargers with projects where all construction activities (including passive treatment, active treatment systems, and/or active equipment) will be suspended for 30 days or more (Section III.G);

• There is a change in construction or operations that may affect the discharge of pollutants to surface waters, groundwater(s), or a municipal separate storm sewer system (MS4) (Sections IV.O. and

VI.Q.1)

• When deemed necessary by the Lab’s QSD or the Project Team’s QSD. The Project Team’s QSD shall consult with the Project Team’s QSP before permitting the QSP to make field determinations for the changes listed in Table 1-1. The Project Team’s QSD shall adjust Table 1-1 content as needed for the Project site. All other changes and revisions shall be made by the Project Team’s QSD as formal amendments to the SWPPP.

The Permit requires the Project Team’s QSD “revise the SWPPP to address potential problems identified by visual inspections, sampling data, comments from a QSP, or their own site observations (Section V.C.2).

The following items shall be included in each amendment:

• Who requested the amendment;

• The location of proposed change;

• The reason for change;

• The original BMP(s) proposed, if any;

• The new BMP(s) proposed;

• QSD certification.

SWPPP amendments will be logged at the front of the SWPPP and QSD ammendment certifications shall be recorded in Appendix D. The SWPPP text shall be revised, replaced and/or hand annotated as necessary to properly convey the amendment. The following changes have been designated by the QSD as “to be field determined” and constitute minor changes that the QSP may implement based on field conditions.

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Table 1-1 Changes to be Field Determined by the Project Team’s QSP

Candidate Changes for Field Location or Determination by the Project Team’s QSP(1)

Changes that can be field located or field determined by the Project Team’s QSP

Increase quantity of an Erosion or Sediment Control Measure

Relocate/Add stockpiles or stored materials

Relocate or add portable toilets

Relocate vehicle storage and/or fueling locations

Relocate areas for waste storage

Relocate water storage and/or water transfer location

Changes to access points (entrance/exits)

Change type of Erosion or Sediment Control Measure

Changes to location of erosion or sediment control

Minor changes to schedule or phases

Changes in construction materials

(1) Any field changes not identified for field location or field determination by the Project Team’s QSP shall be approved by the

Lab’s QSD and /or the Project Team’s QSD.

1.5 Retention of Records

Paper or electronic records of documents required by this SWPPP will be retained by the Lab’s QSD for a minimum of three years from the date generated or date submitted, whichever is later, for the following items:

• SWPPP;

• Visual monitoring reports;

• Sampling equipment calibration records;

• pH and turbidity sampling field sheets;

• Analytical laboratory reports;

• Training Rosters

These records will be available at the Project until construction is complete. Records assisting in the determination of compliance with the Permit will be made available within a reasonable time to the Regional Water Board, State Water Board, or U.S. Environmental Protection Agency (EPA) upon request. Requests by the Regional Water Board for retention of records for a period longer than three years will be adhered to.

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1.6 Non-Compliance Reporting

Planned changes in site construction activities that may result in Permit non-compliance shall be provided in writing to the Regional Water Board and local stormwater agency in advance of the changes.

If a Permit discharge violation occurs, the Project Team’s QSP shall immediately notify the Project Team’s QSD and the Lab’s QSD who will file a violation report electronically to the Regional Water Board within 30 days of identification of non-compliance using SMARTS. Corrective measures will be implemented immediately following the discharge or written notice of non-compliance from the Regional Water Board.

Discharges and corrective actions will be documented on the numeric action limits / numeric effluent limits (NAL/NEL) Exceedance Site Evaluation Report Form in CSMP Attachment 3, Example Forms. The Building 59 NERSC Facility Upgrade II project is Risk Level 2 and subject to NAL/NEL criteria.

The report to the LBNL's QSD and the Regional Water Board will contain the following items:

• The date, time, location, nature of operation and type of unauthorized discharge.

• The cause or nature of the notice or order.

• The control measures (BMPs) deployed before the discharge event, or prior to receiving notice or order.

• The date of deployment and type of control measures (BMPs) deployed after the discharge event, or after receiving the notice or order, including additional measures installed or planned to reduce or prevent re-occurrence.

• In the event of non-compliance, all documentation regarding the non-compliance will be included in the SWPPP in Appendix E.

Corrective measures will be implemented immediately following identification of the discharge or written notice of non-compliance from the Regional Board. Discharges and corrective actions must be documented and include the following items:

• Results of (pH and turbidity, etc.) monitoring will be electronically submitted through SMARTS by the Lab’s QSD for all field sampling results within 30 days of the completion of the precipitation event or within 10 days if the field sampling results demonstrate the exceedance of the pH and/or turbidity NALs.

• Results of non-visible pollutant monitoring and corrective actions will be electronically submitted within 30 days after obtaining analytical results or within 10 days if the analytical results demonstrate the exceedance of an applicable TMDL-related NAL or NEL or Basin Plan parameter.

• An NAL exceedance report will be prepared when requested, in writing, by the Regional Water Board.

• In the event of a TMDL NEL exceedance, by the end of each reporting year the Project will submit and certify, in SMARTS, documentation of the site assessment, SWPPP evaluation, and implementation of the corrective actions. Results of monitoring (pH, turbidity, flowrate, volume discharged, and freeboard storage) will be electronically submitted monthly during the project.

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• In the event of an ATS NEL exceedance, results will be electronically certified and submitted to SMARTS within 24-hours of obtaining the results. The Regional Water Board will be notified via email 24 hours prior to the beginning of a planned dewatering discharge.

• In the event of an emergency dewatering, the Regional Water Board and applicable MS4 are to be notified within 24 hours of a discharge occurring. An emergency is defined as the need to protect human life and health or prevent severe property damage.

• Results of (pH and turbidity, etc.) monitoring will be electronically submitted through SMARTS for all field sampling results within 30 days of the completion of the precipitation event or within 10 days if the field sampling results demonstrate the exceedance of the pH and/or turbidity NALs.

Reporting requirements are identified in Permit Section VI.P.

1.7 Annual Report

The Permit requires that all permittees prepare, electronically certify and submit an Annual Report through SMARTS by September 1st for the previous reporting period from July 1st through June 30th if a WDID number is active for at least 90 days within the reporting period. The Lab’s QSD shall retain an electronic copy or hard copy of each Annual Report for a minimum of three years after the date the Annual Report is certified.

The report will be prepared and signed by the Project Team’s QSD, submitted to LBNL’s Project Manager for review and signature, then uploaded to SMARTS by The Lab’s QSD. Reporting requirements are identified in Section IV.P of the Permit and include (but are not limited to) providing a summary of:

• A summary of all stormwater sampling and monitoring reports and supporting documents (e.g., laboratory reports);

• A summary of all corrective actions taken during the compliance year;

• Identification and explanation of any compliance activities (e.g., missed sampling or visual inspections) or corrective actions that were not implemented;

• A summary of all the General Permit violations;

• The names of individual(s) who performed the site inspections, sampling, visual inspections, and/or measurements;

• The date, place, time of site inspections, sampling, visual inspections, and/or measurements, including the amount of precipitation measured in inches;

• All visual inspection and sample collection exception records and reports.

1.8 Revising Permit Coverage Information

Per Permit Section III (F and G), the Lab’s QSD shall revise permit coverage information, as appropriate, to:

• Update Construction Start and End Dates

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• Reduce Acreage

• Terminate Programmatic Permit Coverage for Linear Underground and Overhead Projects

• Increase Acreage

• Change Ownership

• Declare a Project Inactive

All updates to permit coverage will be submitted on SMARTS by the Lab’s QSD and will be included in Appendix F of the SWPPP. Any related SWPPP revisions or amendments prepared by the Project Team’s QSD will be provided to The Lab’s QSD and included in Appendix G.

1.9 Notice of Termination

Per Permit Section III.H, the Lab’s QSD will submit a Notice of Termination (NOT) electronically via SMARTS to terminate permit coverage. Supporting documentation for the NOT submittal will be prepared and signed by the Project Team’s QSD and will include a final site map and photos. The Project Team’s QSD shall submit the completed supporting documentation to LBNL’s Project Manager for review and signature. The reviewed and signed document will then be provided to the Lab’s QSD for upload to the SMARTS database.

The NOT final site map shall, at minimum, include the following:

• Project boundaries and adjacent lands with labeled key features, such as roadways and waterbodies;

• Developed drainage basin boundaries and discharge location points;

• Site entrances and exits, lot boundaries, roads, structures, and features related to the project that may be used as a reference;

• Specific permanent erosion control BMPs, post-construction BMPs, and low impact development features;

• Individual erosion control BMPs (including final landscaping) identified using hatch patterns, symbols, or shading unique to each BMP;

• Location and orientation of all photos used to document final site conditions and demonstrate compliance with post-construction requirements of this General Permit;

• If applicable, areas of the site being transferred to new ownership, and the name and contact information of the owner.

The Regional Water Board will consider a site, parcel, or individual lot complete only when all portions of the site comply with all the following conditions:

• The Project has completed all construction activity;

• There is no greater potential for construction-related stormwater pollutants to be discharged into site runoff than prior to the construction activity;

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• Construction-related equipment and temporary BMPs have been removed from the site, except as set forth in Section III.F.2.b above;

• Construction materials and wastes have been disposed of properly;

• Soils disturbed by construction activities have been permanently stabilized (final stabilization), except as set forth in Permit Section III.F.2.b, using materials that:

Have a product life that support the full and continued stabilization of the site;

Achieve stabilization without becoming trash or debris;

Minimize the risk of wildlife entrapment;

• The Lab ensures the Project Team’s QSP has completed on-site visual inspections and verified the site complies with all NOT requirements, including installation of post-construction stormwater runoff BMPs and/or low impact development features;

• The Lab’s LRP (or DAR) has submitted the information in the NOT and has certified and submitted through SMARTS;

• The Project Team’s QSD has demonstrated that the site complies with all NOT conditions and all final stabilization conditions by one of the following methods:

70 percent final cover method. No computational proof required. Requires permanent vegetative cover to be evenly established over 70 percent of all disturbed and exposed areas of soil (non-paved or non-built). In areas that naturally have low vegetative coverage (e.g., deserts), 70 percent of natural conditions of local undisturbed areas is acceptable.

Photos of all site areas are required to verify compliance with the 70 percent final cover requirement;

• Or

Revised Universal Soil Loss Equation (RUSLE or RUSLE2) method. Computational proof required. Site conditions shall match values used in method computation. Photos of all site areas are required to verify pre-construction and post-construction conditions used in the computations;

• Or

Custom method. The Lab may request approval from the Regional Water Board to use a method or analytical model other than those specified in Permit Section III.H.4.h.i and 4.h.ii to demonstrate that the site complies with the “final stabilization” requirements. Photos of all site areas are required to verify the custom method used.

NOT photo documentation prepared by the Project Team’s QSD shall include:

• Photos of the site’s final site conditions;

• Post-construction BMPs and/or low impact development features;

• A description of the corresponding location, and orientation of photos as indicated on the final site map.

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The Project Team’s QSD’s supporting documentation for the NOT shall include a description of the long-term maintenance plan for the post-construction stormwater runoff BMPs and/or low impact development features being implemented. For the purposes of this requirement, a long-term maintenance plan shall be designed for a minimum of five years, and shall describe the responsible party, schedule, and procedures needed to ensure that post-construction features are adequately maintained and functional.

The NOT will be automatically approved 30 calendar days after the date of NOT submittal, unless, within the 30 calendar days the Regional Water Board notifies the Lab through SMARTS that the NOT has been denied, returned, or accepted for review.

All Permit requirements shall remain in effect until the NOT is approved. The Lab’s LRP will be notified through SMARTS communication when the Lab’s Permit coverage and corresponding WDID number are terminated.

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2 Project Information

2.1 Introduction

The University of California (UC), as the management and operating contractor of the Lab, proposes to upgrade Building 59 electrical and cooling systems at and install and operate a new high-performance computing system identified as National Energy Research Scientific Computing Center-10 (NERSC-10).

The purpose of the facility upgrade is to accommodate NERSC-10 and potential future generations of high-performance computing systems while reducing reliance upon potable water for facility cooling. New generations of high-performance computing systems like NERSC-10 are necessary to further advance NERSC’s mission of accelerating scientific discovery. Together, the NERSC facility upgrade and the NERSC-10 installation and operation components would comprise the Project.

2.2 Project Site

LBNL is situated in the hills of the cities of Berkeley and Oakland in Alameda County on approximately 200 acres that are owned by UC (Figure1-1). The Lab hill site is surrounded by open space, institutional uses, and residential and neighborhood commercial areas. UC Berkeley’s main campus and its Hill Campus, including the Strawberry Canyon open space areas, lie south of the Lab hill site. Residential neighborhoods and a small neighborhood commercial area in the City of Berkeley lie to the west, and regional open space, including the 2,000-acre Tilden Regional Park, lies to the northeast.

Figure 1-1 Site Location Map

Project Information Building 59 NERSC Facility Upgrade II

2-2

The Project site is located at 37.º52’32.78” north latitude and 122.º15’09.03” west longitude with an approximate elevation of 690 feet above mean sea level (msl). The Project site encompasses aproximately 1 acre and topography generally slopes from the north east to south-west, and is adjacent to the head of a small canyon that slopes south-west towards an intermittent waterway named Cafeteria Creek (Appendix B). In general, the rainy season is from October 1 to May 1 for each winter to spring season.

Major facilities and infrastructure surrounding the Project site include Perlmutter Road to the east, and the Building 50 and Building 70 complexes to the east and northeast. Land surrounding the Project site is undeveloped and slopes west to Chu Road, and south to Cafeteria Creek.

2.3 Project Characteristics

The Building 59 NERSC Facility Upgrade II would modernize and upgrade the building’s electrical and cooling systems. The upgrade will be necessary to simultaneously operate the proposed new NERSC-10 and existing NERSC-9 high performance computing systems while optimizing use of electricity and substantially reducing water consumption. Installing and operating NERSC-10 would support LBNL’s National Energy Research Scientific Computing Center (NERSC) program, which is the DOE Office of Science’s production computing facility. The proposed NERSC-10 HPC system—which would occupy the vacated NERSC-8 system location—is expected to use up to ~20 megawatts (MW) of power at peak performance, while the entire building with up to two HPC systems could use up to 29 MW at peak simultaneous demand.

The electrical scope of work includes installation of a new medium-voltage sectionalizing switch to accommodate additional power. This would be located on a new ~2,000-square-foot concrete pad (Switch Pad) southeast and adjacent to Building 59. Interior electrical improvements would include two secondary unit substations. Both units would be dedicated to increased HPC electrical capacity. Feeder lines would connect the substations to existing wall panels and new equipment.

To address HPC cooling needs, an array of six air-cooled heat-exchanger (ACHE) units is proposed to be located on a new, unenclosed, <12,000-square-foot steel platform (ACHE platform) north and adjacent to Building 59. Acoustic and visual screening walls would be placed around the ACHE platform to minimize noise and visual effects. This new system would serve as a “precooler” for HPC exhaust water, which would substantially reduce evaporative cooling water consumption despite a planned increase in HPC cooling needs. Under the Project, current Building 59 water consumption of ~20 million gallons per year (MGY) would be expected to drop to an average of around 8 MGY.

Construction would commence in late 2024 with work continuing through 2026. The NERSC-10 system may be delivered in two phases. Phase one is anticipated for a late 2025 delivery, followed by Phase 2 in late 2026. An average of 35 onsite workers with a peak crew of 50 is expected over the duration of project construction. Work would primarily occur during business hours from Mondays to Fridays; however, a few planned utility outages could result in instances of weekend work.

Up to three delivery truck trips are expected on a daily basis, the majority of which would be accomplished using light-duty trucks. Occasional heavier construction trucks would include soil-hauling and concrete

2-3 trucks for excavating and constructing the exterior concrete switch pad and ACHE platform. Once equipment is placed, it would be integrated using hand-held tools and small-scale lifts.

Work elements for the Project include but are not limited to:

• Install perimeter fence(s) and stormwater controls;

• East Slope Pad and equipment buildout;

• North Slope Structure and equipment buildout;

• Install underground electrical banks;

• Panelboard feeder connections;

• Route new Cooling Water System piping;

• Electrical equipment ventilation;

• Cooling Water System outage work;

• Comission Modified Cooling Water System;

• Final landscaping and site stabilization.

2.3.1 Existing and Proposed Stormwater Drainage

As stated in Section 2.2, the Project site is located adjacent to a small canyon that slopes south-west towards the intermittent Cafeteria Creek. Land surrounding the Project site is undeveloped and slopes west to Chu Road, and south to Cafeteria Creek.

Surface drainage at the site currently flows to stormdrain inlets that flow indirectly to the South Fork of Strawberry Creek located within the Strawberry Creek watershed. The Cafeteria Creek subwatershed includes Building 59 and surrounding landscaped zones and drains to Cafeteria Creek and then to the South Fork of Strawberry Creek.

The confluence of the North and South Fork of Strawberry Creeks is located on the UC Berkeley campus which then flows to the Central Basin of San Francisco Bay. The Central Basin of San Francisco Bay is not listed on the most recent 303(d) list for sediment or other contaminants currently known or suspected within the project area.

The proposed Project would result in negligible or no change in use and have substantially the same purpose and capacity as existing Building 59 operations, and would not substantially change the area of impervious surfaces at the Project site.

To manage the modest stormwater runoff from a small increase in impervious surfaces on the project site, the Project will install two subsurface stormwater hydromodification tanks with a total capacity of ~16,000 gallons. These tanks will detain stormwater during large storm events and control its release to maintain the downstream health of Strawberry Creek and its tributaries. This would also help ensure project compliance with Federal Energy Independence and Security Act (EISA) section 438 requirements as well as NPDES requirements, including C3 requirements related to hydromodification.

The BMPs would provide improved water quality and decrease the peak discharge rate compared to existing conditions before ultimately discharging into the City of Berkeley’s storm drain system. The BMPs

2-4 would be sized using the County “4-percent method,” which is a simplified method for sizing stormwater treatment facilities and recommends that the surface area of the treatment area should be 4 percent of the impervious area that drains to it for treatment.

2.3.2 Geology and Hydrogeology

The Project area is generally underlain at shallow depths by Great Valley Complex rock, which consists predominantly of sandstone and shale. There is a geologic contact between Great Valley Complex rock and the Orinda Formation east of the Project area, near Building 23. Soils encountered in previous borings drilled within the vicinity of the Project area consist predominantly of clays containing varying amounts of silt, sand, and gravel.

Groundwater levels at the Project site are expected to vary seasonally, with higher groundwater levels occurring during and following periods of heavy and/or prolonged rainfall. A review of boring logs from site investigations within the vicinity of the Project site have limited groundwater data, with many borings indicating that groundwater was “not encountered”, while others indicate groundwater at relatively shallow depths of 14 feet below ground surface (bgs).

2.3.3 Site Preparation

Site preparation prior to commencement of project activities will require minor site activity that will take place before construction activity. These activities include, but are not limited to:

• Installation of fencing and barriers for security and safety;

• Signage for pedestrian and vehicular traffic control;

• Scanning and potholing to locate underground utilities;

• Isolation and deactivation or rerouting of existing utilities;

• Maintaining emergency access.

2.4 Stormwater Run-On from Offsite Areas

Based on a review of current site conditions, there is not a potential for surface water run-on from offsite areas located adjacent to the Project site. In the event of offsite run-on, existing curbs, gutters, and storm drain inlets around the perimeter of the Project site should be utilized to divert surface water run-on from entering the Project boundaries. If offsite run-on is observed, the Permit requires that temporary BMPs be implemented to direct offsite run-on away from disturbed areas through the use of runoff controls.

The following BMPs may be…