ATT-PFMD-062226-18-Draft Stormwater Pollution Prevention Plan-SHR Aviation Flight Line Pavement Repl.pdf

DRAFT

SHR Aviation Flight Line Pavement Replacement i March 2026

DRAFT

STORMWATER POLLUTION PREVENTION PLAN

for

SHR Aviation Flight Line Pavement Replacement

Project Location:

WDID: X XXXXXXXXX

RISK LEVEL: 1

Legally Responsible Person (LRP):

San Bernadino International Airport Authority

1601 east 3rd Street

San Bernadino, CA 92408

Jonathan Galvan

909-382-0011

Project Address:

199 Hangar Way

San Bernadino, CA 92415

Site Operating Hours:

8AM-5PM

Estimated Project Dates:

Start of Construction: 05/01/2026

Completion of Construction: 10/31/2026

SWPPP Prepared by:

Huitt Zollars, Inc.

90 E. thousand Oaks Blvd. Suite 201

Thousand Oaks, CA 91360

SWPPP Preparation Date:

03/11/2026

QSD Name and Signature:

Kevin C. Carter, PE

10/26/2026 07/14/2027

.8 36C412122

SHR Aviation Flight Line Pavement Replacement ii March 2026

Contact Information

Role Name Phone Number License or Certification Number, if Applicable

Qualified SWPPP Developer (QSD)

Practitioner (QSP)

Practitioner (QSP)

QSP Delegate

Index of Appendices

Appendix Title Page

A

B

C

D

E

F

G

H

I

J

K

L

M

N

O

P

Q

SHR Aviation Flight Line Pavement Replacement iii March 2026

R

S

SHR Aviation Flight Line Pavement Replacement iv March 2026

Table of Contents

Table of Contents ...................................................................................................iv

Qualified SWPPP Developer ................................................................................ vii

Amendment Log ................................................................................................. viii

Section 1 SWPPP Requirements .................................................................. 1-1

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

1.2 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 Reporting ...................................................................................................................... 1-4

1.7 Changes to Permit Coverage ......................................................................................... 1-6

1.8 Notice of Termination ................................................................................................... 1-6

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

2.1 Project and Site Description ......................................................................................... 2-1

2.1.1 Site Description ........................................................................................................ 2-1

2.1.2 Existing Conditions .................................................................................................. 2-1

2.1.3 Existing Drainage..................................................................................................... 2-1

2.1.4 Geology and Groundwater ....................................................................................... 2-1

2.1.5 Project Description .................................................................................................. 2-2

2.1.6 Developed Condition ............................................................................................... 2-2

2.2 Permits and Governing Documents .............................................................................. 2-2

2.3 Stormwater Run-On from Offsite Areas ....................................................................... 2-3

2.4 Findings of the Construction Site Sediment and Receiving Water Risk Determination 2-

2.5 Construction Schedule .................................................................................................. 2-5

2.6 Potential Construction Activity and Pollutant Sources ................................................ 2-6

2.7 TMDL Requirements .................................................................................................... 2-6

2.8 Identification of Non-Stormwater Discharges ............................................................. 2-6

2.9 Required Site Map Information .................................................................................... 2-7

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

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

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

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

3.2.2 Sediment Controls ................................................................................................... 3-6

SHR Aviation Flight Line Pavement Replacement v March 2026

3.3 Non-Stormwater Controls and Waste and Materials Management ............................. 3-9

3.3.1 Non-Stormwater Controls ....................................................................................... 3-9

3.3.2 Materials Management and Waste Management .................................................. 3-13

3.4 TMDL-Related BMPs .................................................................................................. 3-15

3.5 Post Construction Stormwater Management Measures ............................................. 3-16

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

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

Section 5 Training ........................................................................................ 5-1

Section 6 Responsible Parties and Operators............................................... 6-1

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

6.2 Contractor List .............................................................................................................. 6-3

Section 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

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

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

7.6 Visual Monitoring .................................................................................................... 7-2

7.7 Water Quality Sampling and Analysis ..................................................................... 7-7

7.8 Active Treatment System Monitoring.................................................................... 7-19

7.9 Passive Treatment Monitoring .............................................................................. 7-19

7.10 Watershed Monitoring Option .............................................................................. 7-19

7.11 Quality Assurance and Quality Control ................................................................. 7-20

7.12 Records Retention ................................................................................................. 7-22

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

SHR Aviation Flight Line Pavement Replacement vi March 2026

Appendices

Appendix A: Site Maps and Drawings

Appendix B: Permit Registration Documents

Appendix C: SWPPP Amendment QSD Certifications

Appendix D: Submitted Changes of Information

Appendix E: Construction Schedule

Appendix F: Construction Activities, Materials Used, and Associated Pollutants

Appendix G: CASQA Stormwater BMP Handbook: Construction Fact Sheets

Appendix H: BMP Inspection Form

Appendix I: Training Forms

Appendix J: Responsible Parties

Appendix K: Contractors and Subcontractors

Appendix L: Calculations

Appendix M: Weather Reports

Appendix N: Monitoring Records

Appendix O: Example Storm Event Monitoring Forms

Appendix P: Field Meter Instructions

Appendix Q: Supplemental Information

Appendix R: Active Treatment System and Passive Treatment Plans

Appendix S: Construction General Permit

SHR Aviation Flight Line Replacement vii March 2026

Qualified SWPPP Developer

Approval and Certification of the Stormwater Pollution Prevention Plan

Project Name: SHR Aviation Flight Line Pavement Replacement

Project Number/ID: 316080.03

“This Stormwater Pollution Prevention Plan and its appendices were prepared under my direction to meet the requirements of the California Construction Stormwater General Permit (Order No. 2022- 0057-DWQ). I certify that I am a Qualified SWPPP Developer in good standing as of the date signed below and will maintain up to date credentials for the duration of the project.”

NOTE: THIS DRAFT-SWPPP HAS BEEN PREPARED FOR FILING OF NOTICE OF INTENT

ONLY. THE PROJECT LEGALLY RESPONSIBLE PERSON (LRP) SHALL ENSURE THAT THE

SELECTED SHALL ENSURE THAT THE SELECTED CONTRAQCTOR HAS A QUALIFIED SWPPP

DEVELOPER AND QUALIFIED SWPPP PRACTITIONER (QSP) ASSIGNED TO THE

CONSTRUCTION PROJECT AND A FINAL SWPPP PREPARED PRIOR TO START OF

CONSTRUCTION AND A FINAL SWPPP SHALL BE SUBMITTED ON THE STATE MULTIPLE

APPLICATION AND REPORT TRACKING SYSTEM (SMARTS) BY THE CONSTRUCTION PHASE

QSD. THE LRP AND CONSTRUCTION PHASE QSD/P WILL BE RESPONSIBLE FOR ALL

CONSTRUCTION SITE MONITORING AND REPORTING REQUIREMENTS. THE LRP SHALL

FILE A NOTICE OF TERMINATION (NOT) ONCE THE CONSTRUCTION SITE HAS BEEN

STABLIZED AS REQURIED BY THE GENERAL PERMIT.

CONTRACTOR HAS A QUALIFIED SWPPP

QSD Signature

Kevin Carter, PE/QSD

Date

RCE No. 44665

QSD Name

Vice President

Huitt-Zollars, Inc.

QSD Certificate Number

(805)418-1802

Title and Affiliation kcarter@huitt-zollars.com

Telephone Number

Email

6/18/2026

SHR Aviation Flight Line Pavement Replacement viii March 2026

Amendment Log

Project Name: SHR Aviation Flight Line Pavement Replacement

Project Number/ID: 316080.03

Amendment No.

Date Brief Description of Amendment

(include section and page number) Prepared and Approved By

Name:

QSD#

The SWPPP will be revised when:

• There is a 2022 CGP violation (2022 CGP Section VI.Q.1);

• There is a reduction or increase in total disturbed acreage (2022 CGP Section III.F.2. and F.4);

• BMPs are not effective and are not resulting in a reduction or elimination of pollutants in stormwater discharges and authorized non-stormwater discharges (2022 CGP 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 (2022 CGP 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 (2022 CGP 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) (2022 CGP Sections IV.O. and VI.Q.1); or

When deemed necessary by the QSD. The QSD has determined that the changes listed in Table 1-1 can be field determined by the QSP. All other changes will be made by the QSD as formal amendments to the SWPPP. Note that the 2022 CGP requires that the QSD “revise the SWPPP to address potential problems identified by visual inspections, sampling data, comments from a QSP, or their own site observations (2022 CGP Section V.C.2.).

SWPPP Amendment QSD Certifications are located in Appendix C.

SHR Aviation Flight Line Pavement Replacement 1-1 March 2026

Section 1 SWPPP Requirements

1.1 INTRODUCTION

This Stormwater Pollution Prevention Plan (SWPPP) is designed to comply with California’s General Permit for Stormwater Discharges Associated with Construction and Land Disturbance Activities (2022 CGP), State Water Resources Control Board (State Water Board) Order No. 2022-0057-DWQ (NPDES No. CAS000002) (Appendix S). This SWPPP has been prepared following the 2022 CGP SWPPP Template for Traditional Projects provided in the California Stormwater Quality Association (CASQA) Stormwater Best Management Practice (BMP) Handbook: Construction (CASQA 2023).

This project is considered a traditional construction project.

In accordance with the 2022 CGP, 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; and

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

The SHR Aviation Flight Line Pavement Replacement Project comprises approximately 1,330 acres, of which 5.53 acres will be disturbed. The Project is located at 199 Hangar Way, situated in the northern portion of the San Bernadino International Airport property in San Bernadino, California. The property is owned by the San Bernadino International Airport Authority and is being developed by the San Bernadino County Project and Facilities Management Department.

The project’s location is shown on the Vicinity Maps in Appendix A.

SHR Aviation Flight Line Pavement Replacement 1-2 March 2026

1.2 PERMIT REGISTRATION DOCUMENTS

Required Permit Registration Documents (PRDs) shall be submitted to the State Water Board via the Stormwater Multi Application and Report Tracking System (SMARTS) by the LRP or DAR. The project-specific PRDs include (2022 CGP Section III.A):

1. Notice of Intent (NOI);

2. Risk Level Determination (Construction Site Sediment and Receiving Water Risk Determination);

3. Site Drawings and Map;

4. SWPPP;

5. Applicable plans, calculations, and other supporting documentation for compliance with the Phase I or Phase II municipal separate storm sewer system (MS4) post construction requirements or the post-construction standards of the 2022 CGP:

• Attachment or web-source containing the applicable Phase I or Phase II MS4 post construction requirements;

• The post construction plans and calculations submitted to or approved by the applicable Phase I or Phase II MS4; and/or

• Post-construction water balance calculation;

6. Dischargers proposing an alternate K-factor or LS-factor must submit documentation to support the site-specific factors;

7. Annual Fee per the current 23 California Code of Regulations Chapter 9 fee schedule for National Pollutant Discharge Elimination System (NPDES) stormwater permits; and

8. Signed Certification Statement (LRP Certification is provided electronically with SMARTS PRD submittal).

Site Maps can be found in Appendix A. A copy of the submitted PRDs shall also be kept in Appendix B along with the Waste Discharge Identification (WDID) confirmation.

1.3 SWPPP AVAILABILITY AND IMPLEMENTATION

The SWPPP will be available at the construction site during working hours list on the title sheet and Section 7.5, while 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 2022 CGP may be kept in electronic format at the site so long as the information requested by a federal, state, or municipal inspector can be made available during an inspection. Legible maps in hard copy must be available at the site (2022 CGP Section IV.O.1.).

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 coverage under the 2022 CGP.

1.4 SWPPP AMENDMENTS

SWPPP changes or amendments will be uploaded through SMARTS within 30 calendar days.

The SWPPP will be revised when:

• If there is a 2022 CGP violation (2022 CGP Section VI.Q.1);

SHR Aviation Flight Line Pavement Replacement 1-3 March 2026

• There is a reduction or increase in total disturbed acreage (2022 CGP Section III.F.2 and F.4.);

• BMPs are not effective and are not resulting in a reduction or elimination of pollutants in stormwater discharges and authorized non-stormwater discharges (2022 CGP Section VI.Q.1 and Attachment D Section III.C.5);

• There is a change in the project duration that changes the project’s risk level (2022 CGP Section III.F.1); or

• 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 (2022 CGP Section III.G.).

Additionally, the SWPPP will be amended when:

• 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) (2022 CGP Sections IV.O. and VI.Q.1); or

When deemed necessary by the QSD. The QSD has determined that the changes listed in Table 1-1 can be field determined by the QSP. All other changes will be made by the QSD as formal amendments to the SWPPP. Note that the 2022 CGP requires that the QSD revise the SWPPP to address potential problems identified by visual inspections, sampling data, comments from a QSP, or their own site observations (2022 CGP 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; and

• QSD certification.

SWPPP amendments will be logged at the front of the SWPPP and SWPPP Amendment QSD certifications will be located in Appendix C. The SWPPP text will be revised, replaced and/or hand annotated as necessary to properly convey the amendment. SWPPP amendments must be made by a QSD. 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.

Table 1-1 List of Changes to be Field Determined

Candidate changes for field location or determination by QSP (1)

Check changes that can be field located or field determined by

QSP

Increase quantity of an Erosion or Sediment Control Measure

Relocate/add stockpiles or stored materials ✓

Relocate or add toilets ✓

SHR Aviation Flight Line Pavement Replacement 1-4 March 2026

Table 1-1 List of Changes to be Field Determined

Candidate changes for field location or determination by QSP (1)

Check changes that can be field located or field determined by

QSP

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 or location of Erosion or Sediment Control Measure

Minor changes to schedule or phases ✓

Changes in construction materials ✓

(1) Any field changes not identified for field location or field determination by the QSP must be made as an amendment by the QSD.

1.5 RETENTION OF RECORDS

Paper or electronic records of documents required by this SWPPP will be retained 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; and

These records will be available at the Site until construction is complete. Records assisting in the determination of compliance with the 2022 CGP 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.

1.6 REPORTING

Completed inspection checklists are not required to be submitted to the Regional Water Board.

However, completed inspection checklists will be kept with the SWPPP on-site or electronically.

The 2022 CGP requires that permittees prepare, certify, and electronically submit an Annual Report no later than September 1 of each year. Reporting requirements are identified in 2022 CGP Section VI.P. Annual reports will be filed in SMARTS and in accordance with information required by the online forms.

Planned changes in site construction activities that may result in non-compliance with the 2022 CGP are required to be provided in writing to the Regional Water Board and local stormwater agency in advance of the changes.

SHR Aviation Flight Line Pavement Replacement 1-5 March 2026

If a 2022 CGP discharge violation occurs, the QSP will immediately notify the LRP. The LRP will include information on the violation with the Annual Report. 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:

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

• The cause or nature of the notice or order;

• The BMPs deployed before the discharge event, or prior to receiving notice or order; and

• The date of deployment and type of 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.

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. See Section 7.7.2.7 for additional discussion of the reporting requirements.

Reporting requirements for pH and turbidity Receiving Water Monitoring Triggers are discussed in Section 7.7.2.7.

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. See Section 7.7.1.7 for additional discussion of the reporting requirements.

A 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. See the ATS Plan for additional discussion of the reporting requirements.

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.

See Section 7.7.4.5 for additional discussion of the reporting requirements including contacts for Regional Water Board and MS4 notifications.

SHR Aviation Flight Line Pavement Replacement 1-6 March 2026

A Passive Treatment Plan will be submitted electronically 14 days before passive treatment chemicals are used on site. See the Passive Treatment Plan for additional discussion of the reporting requirements.

1.7 CHANGES TO PERMIT COVERAGE

The 2022 CGP allows for the reduction or increase of the total acreage covered under the 2022 CGP when: a portion of the project is complete and/or conditions for termination of coverage have been met; when ownership of a portion of the project is purchased by a different entity; or when new acreage is added to the project.

Modified PRDs will be filed electronically through a Change of Information (COI) within 30 days of a reduction or increase in total disturbed area if a change in permit-covered acreage is to be sought. The SWPPP will be modified appropriately and will be logged at the front of the SWPPP. SWPPP Amendments QSD Certifications will be located in Appendix C. COIs submitted electronically via SMARTS can be found in Appendix D.

1.8 NOTICE OF TERMINATION

A Notice of Termination (NOT) must be submitted electronically by the LRP or DAR via SMARTS to terminate coverage under the 2022 CGP.

According to the requirements of 2022 CGP Section III.H.4., the following final stabilization method will be used to satisfy final stabilization condition requirements:

70 percent final cover method supported by pre- and post-project photographs demonstrating stabilization.

RUSLE or RUSLE2 method with computation proof supported by pre- and post-project photographs demonstrating stabilization.

Custom method for which Regional Water Board approval has been obtained, supported by documentation required by the Regional Water Board and pre- and pos- project photographs demonstrating stabilization.

The Regional Water Board will consider a construction site complete when the conditions of the 2022 CGP Section III.H., have been met.

The discharger is required to submit the following in SMARTS:

• NOT SMARTS Form;

• QSP-prepared final NOT inspection which includes the QSP name and valid QSP certificate number;

• Final site map with photo orientation references;

• Photos demonstrating final stabilization and the applicable post-construction BMPs and/or low impact development; and

• A long-term maintenance plan for the post-construction stormwater runoff BMPs and/or low impact development features being implemented.

According to the 2022 CGP, the NOT will be automatically approved within 30 calendar days after the date the NOT was submitted, unless, within the 30 calendar days the Regional Water Board notifies the discharger through SMARTS that the Notice of Termination has been denied, returned, or accepted for review (2022 CGP Section III.H.7).

SHR Aviation Flight Line Pavement Replacement 1-7 March 2026

Note: If an Annual Report has not been filed in the current reporting year, an Annual Report will need to be submitted prior to the NOT.

SHR Aviation Flight Line Pavement Replacement 2-1 March 2026

Section 2 Project Information

2.1 PROJECT AND SITE DESCRIPTION

2.1.1 Site Description

The SHR Aviation Flight Line Pavement Replacement Project site is Risk Level 1 that comprises approximately 1,330 acres and is located at 199 Hangar Way, situated in the northern portion of the San Bernadino International Airport, in San Bernadino, California. The project site is located approximately 1,200 feet south of East 3rd Street, and 2,500 feet north of the Santa Ana River. The project is located at a latitude of 34.102140 and a longitude of -117.228538 and is identified on the Erosion Control Plan in Appendix A.

2.1.2 Existing Conditions

As of the initial date of this SWPPP, the project site is fully developed, consisting of a single-story maintenance hangar, administration building, asphalt paved parking/flightline areas, and multiple helicopter landing pads. The project site was previously developed with the San Bernadino County Sherrif’s Department’s Emergency Operations Division. There are no known historic sources of contamination at the site. Soil sampling and analysis is required when soil contamination is found or suspected. The results of this analysis are on Appendix Q.

2.1.3 Existing Drainage

The project site slopes to the West with a central horizontal ridgeline that diverts a northern and southern slope. The elevation of the project site ranges from 1135 feet to 1140 feet above mean sea level (msl). Surface drainage at the site is split by a ridgeline and currently flows northwest toward the adjacent property and is conveyed through Eastgate Building I’s underground filtration system, and southwest onto an existing taxiway and is conveyed into an existing drainage swale. Existing site topography, drainage patterns, and stormwater conveyance systems are shown on the Erosion Control Plan in Appendix A.

The project discharges to the Santa Ana River. The water quality impairments (303 (d) list and TMDLs identified in the 2022 CGP Table H-1 for the receiving waters are identified in the Table 2-1.

Table 2-1 Applicable 303(d) List Impairments and TMDLs

Receiving Water Water Quality Impairment

303(d) list TMDL (2022 CGP Table H-1)

[Additional compliance actions applicable to the project are discussed in more detail in Section 7.7.]

2.1.4 Geology and Groundwater

Based on field investigation report, number W1755-99-07 by geotechnical consultant, all the borings encountered alluvium deposits either unconsolidated or semi-consolidated, generally of

SHR Aviation Flight Line Pavement Replacement 2-2 March 2026 dry brown silt and poorly graded sand, extending through depths of 20 ½ feet below the existing site grades. Groundwater occurs beneath the site at approximately 66 feet below ground surface, and the closest ground water information was found 0.3 miles north of the site.

2.1.5 Project Description

Project grading will occur on approximately 241,000 square feet of the project, which comprises approximately 0.004% percent of the San Bernadino International Airport. The limits of grading are shown on the Erosion Control Plan in Appendix A. Grading will include cut activities, with the total graded material estimated to be 6,069 cubic yards. Zero cubic yards of fill material will be imported during grading activities. Actions regarding the disposal of graded materials are to be determined. Construction activities will be phased sequentially as follows: Phase 1 & 1A, Phase 2 & 2B, and Phase 3. Phases 1, 2 and 3 primarily consist of the demolition and reconstruction of the total project area, and phases 1A and 2B consist of pavement marking and actions needed to resume normal site operation.

2.1.6 Developed Condition

Post-construction surface drainage will be directed to the north and southwest as surface flow through stormwater conveyance systems and will discharge into northern catch basins and southern trench drains, which will flow to respective underground collection and treatment systems.

Post-construction drainage patterns and conveyance systems are presented on the Erosion Control Plan in Appendix A.

Table 2-2 Construction Site Estimates

Construction site area 1,330 acres

Total area of disturbance 5.53 acres

Percent impervious before construction 100 %

Runoff coefficient before construction 0.71

Percent impervious after construction 100 %

Runoff coefficient after construction 0.71

2.2 PERMITS AND GOVERNING DOCUMENTS

In addition to the 2022 CGP, the following documents have been taken into account while preparing this SWPPP:

• Regional Water Board requirements

• Basin Plan requirements

• Contract Documents

• Air Quality regulations and permits

SHR Aviation Flight Line Pavement Replacement 2-3 March 2026

• Federal Endangered Species Act

• National Historic Preservation Act/Requirements of the State Historic Preservation Office

• State of California Endangered Species Act

• Clean Water Act Section 401 Water Quality Certifications and 404 Permits

• CA Department of Fish and Game 1600 Streambed Alteration Agreement

• California Ocean Plan

• State Water Board GeoTracker database (GeoTracker)

2.3 STORMWATER RUN-ON FROM OFFSITE AREAS

There is no anticipated offsite run-on to this construction site because adjacent developments have been graded to direct water away from the site, and utilities have been installed to serve the intended users for each parcel.

The off-site drainage areas and associated stormwater conveyance facilities or BMPs are shown on Erosion Control Plan in Appendix A.

SHR Aviation Flight Line Pavement Replacement 2-4 March 2026

2.4 FINDINGS OF THE CONSTRUCTION SITE SEDIMENT AND

RECEIVING WATER RISK DETERMINATION

A construction site risk assessment has been performed for the project, and the resultant risk level is Risk Level 1.

The risk level was determined through the use of the R-value determined from EPA’s Rainfall Erosivity Factor Calculator for Small Construction Sites at: https://lew.epa.gov/ in accordance with the State Water Board Guidance for multi-year projects at:

https://www.waterboards.ca.gov/water_issues/programs/stormwater/smarts/construction/do cs/rfactor_guide.pdf, and K and LS provided in SMARTS, a site-specific analysis, etc. The risk level is based on project duration, location, proximity to impaired receiving waters, and soil conditions. A copy of the Risk Level determination submitted on SMARTS with the PRDs is included in Appendix B.

Table 2-3 and Table 2-4 summarize the sediment and receiving water risk factors and document the sources of information used to derive the factors.

Table 2-3 Summary of Sediment Risk

RUSLE

Factor

Value Method for Establishing Value

R 4.18 US EPA’s R-value Calculator

K 0.24 SMARTS

LS 1.98 SMARTS

Total Predicted Sediment Loss (tons/acre) 1.98

Overall Sediment Risk Low Sediment Risk < 15 tons/ acre Medium Sediment Risk >= 15 and < 75 tons/acre High Sediment Risk >= 75 tons/acre

☒ Low

☐ Medium

☐ High

Runoff from the project site discharges into an existing storm drain system north of the site and a drainage swale south of the site that are tributary to the Santa Ana River, and eventually the Pacific Ocean.

Table 2-4 Summary of Receiving Water Risk

Receiving Water Name

303(d) Listed for Sediment Related Pollutant (1)

TMDL for Sediment Related Pollutant (1)

Beneficial Uses of

COLD, SPAWN,

and MIGRATORY

(1) Santa Ana River reach 5, Santa Ana River Reach 4, Santa Ana River Reach 3, Prado Control Basin

☐ Yes ☒ No ☐ Yes ☒ No ☐ Yes ☒ No

Overall Receiving Water Risk ☒ Low

☐ High

(1) If yes is selected for any option the Receiving Water Risk is High https://lew.epa.gov/ https://www.waterboards.ca.gov/water_issues/programs/stormwater/smarts/construction/docs/rfactor_guide.pdf https://www.waterboards.ca.gov/water_issues/programs/stormwater/smarts/construction/docs/rfactor_guide.pdf

SHR Aviation Flight Line Pavement Replacement 2-5 March 2026

Risk Level 1 sites are subject to the narrative effluent limitations specified in the 2022 CGP, and may be subject to numeric effluent limits for applicable TMDLs, dewatering activities, active treatment systems and passive treatment systems used on site. The narrative effluent limitations require stormwater discharges associated with construction activity to minimize or prevent pollutants in stormwater and authorized non-stormwater through the use of controls, structures, and best management practices (BMPs). This SWPPP has been prepared to address Risk Level 1 requirements (2022 CGP Attachment D).

2.5 CONSTRUCTION SCHEDULE

The site sediment risk was determined based on construction taking place between May 1, 2026, and October 31, 2026. Modification or extension of the schedule (start and end dates) may affect risk determination and permit requirements. The LRP shall contact the QSD if the schedule changes during construction to address potential impact to the SWPPP. The estimated schedule for planned work can be found in Appendix E.

SHR Aviation Flight Line Pavement Replacement 2-6 March 2026

2.6 POTENTIAL CONSTRUCTION ACTIVITY AND POLLUTANT

SOURCES

Appendix F includes a list of construction activities and associated materials that are anticipated to be used onsite as well as the pollutant source assessment form that was completed for the project. These activities and associated materials will or could potentially contribute pollutants, other than sediment, to stormwater runoff.

The anticipated activities and associated pollutants were used in Section 3 to select the BMPs for the project. Locations of anticipated pollutants and associated BMPs are shown on the Site Map in Appendix A.

Additionally, proper measures will be taken to ensure that trench spoils or any other soils disturbed during construction activities that are contaminated are not discharged with stormwater or non-stormwater discharges into storm drains or water bodies (except pursuant to a separate NPDES Permit). If contaminated soils are found on site, and the responsible party cannot be identified or fails to take action, soils will be sampled to determine proper handling and protect public safety. The appropriate local, State, and federal agencies along with the appropriate Regional Water Board will be notified when contaminated soils are observed.

For sampling requirements for non-visible pollutants associated with construction activity, please refer to Section 7.7.1. For a full and complete list of onsite pollutants, refer to the Safety Data Sheets (SDS), which are retained onsite at the construction trailer or are available electronically at the site.

2.7 TMDL REQUIREMENTS

Based on the project’s receiving water and the pollutant source assessment, the following TMDLs are applicable to the project (See 2022 CGP Attachment H).

Table 2-8 Project TMDLs

TMDL Applicable Water Body/ Watershed

Pollutants Additional

TMDL-

Related NAL or NEL

Compliance Actions

These TMDLs are also identified in Section 2.1.3. The applicable NALs and NELs are also identified in Section 2.4. BMP requirements related to TMDLs are discussed in Section 3.4.

Monitoring requirements related to TMDLs are discussed further in Section 7.7.

2.8 IDENTIFICATION OF NON-STORMWATER DISCHARGES

Non-stormwater discharges into storm drainage systems or waterways, which are not authorized under the 2022 CGP and listed in the SWPPP, or authorized under a separate NPDES permit, are prohibited.

Non-stormwater discharges that are authorized from this project site include the following:

• Water used to control dust

SHR Aviation Flight Line Pavement Replacement 2-7 March 2026

These authorized non-stormwater discharges will be managed with the stormwater and non-stormwater BMPs described in Section 3 of this SWPPP and will be minimized under the direction of the QSP. Additionally, the non-stormwater discharges not applicable to this project are still allowable granted they do not contact potential pollutant sources.

Activities at this site that may result in unauthorized non-stormwater discharges include:

• Vehicle and equipment cleaning, fueling, and maintenance

• Vehicle and equipment wash water, including concrete washout water

• Blast residue from high pressure washing

Wash water from cleaning painting equipment

• Slurries from concrete and asphalt operations

• Runoff from dust control applications of water or dust palliatives

• Sanitary and septic waste

• Chemical leaks and/or spills of any kind

Steps will be taken, including the implementation of appropriate BMPs, to ensure that unauthorized discharges are eliminated, controlled, disposed, or treated on-site.

Discharges of construction materials and waste, such as fuel or paint, resulting from dumping, spills, or direct contact with rainwater or stormwater runoff, are also prohibited.

The following discharge(s) have been authorized by (a) regional NPDES permit(s):

• NONE

2.9 REQUIRED SITE MAP INFORMATION

The construction project’s Site Map(s) showing the project location, surface water boundaries, geographic features, construction site perimeter and general topography, locations of storm drain inlets that receive runoff from the project, and other requirements identified in 2022 CGP Sections IV.O.2. k. and l are located in Appendix A. Table 2-9 identifies Maps or Sheet Nos.

where required elements are illustrated.

Table 2-9 Required Map Information

Included on Map/Plan

Sheet No. (1) Required Element

Pre-Earthwork Drawings

EC Plan Site and project boundaries

EC Plan Areas disturbed during geotechnical or other preconstruction investigation work

EC Plan Existing roads and trails

EC Plan Drainage areas

SHR Aviation Flight Line Pavement Replacement 2-8 March 2026

Table 2-9 Required Map Information

Included on Map/Plan

Sheet No. (1) Required Element

EC Plan Discharge locations

EC Plan Existing storm drain system if applicable

EC Plan Proposed locations of storage areas for waste

TBDBC Proposed locations of construction materials

EC Plan Proposed locations of project staging areas

TBDBC Proposed locations of stockpiles

TBDBC Proposed locations of vehicles, equipment staging and vehicle maintenance

TBDBC Proposed locations of loading/unloading materials

EC Plan Proposed locations of site access (entrance/exits)

TBDBC Proposed locations of fueling, water storage, water transfer for dust control

N/A Proposed locations of demolition

N/A Proposed locations of other construction support activities

Construction and Earthwork Drawing(s)

EC Plan Site layout (grading plans) including roads

EC Plan Site and project boundaries

EC Plan Drainage areas

EC Plan Discharge locations

TBDBC Sampling locations

N/A Areas of soil disturbance (temporary or permanent)

N/A Proposed active areas of soil disturbance (cut or fill)

EC Plan Proposed locations of erosion control BMPs

N/A Proposed locations of sediment control BMPs

N/A Proposed locations of run-off BMPs

N/A Temporary and/or permanent run-on conveyance (if applicable)

N/A Proposed locations of active treatment systems(s) (if applicable)

TBDBC Proposed locations of storage areas for waste

TBDBC Proposed locations of construction materials

EC Plan Proposed locations of project staging areas

TBDBC Proposed locations of stockpiles

TBDBC Proposed locations of vehicles, equipment and vehicle maintenance

SHR Aviation Flight Line Pavement Replacement 2-9 March 2026

Table 2-9 Required Map Information

Included on Map/Plan

Sheet No. (1) Required Element

TBDBC Proposed locations of loading/unloading materials

EC Plan Proposed locations of site access (entrance/exits)

TBDBC Proposed locations of fueling, water storage, water transfer for dust control

N/A Proposed locations of demolition

TBDBC Proposed locations of other construction support activities

N/A Site-specific procedures to implement final stabilization BMPs as soon as reasonably practicable

Notes:

EC Plan: Erosion Control Plan

TBDBD: To Be Determined By Contractor

SHR Aviation Flight Line Pavement Replacement 3-1 March 2026

Section 3 Best Management Practices

3.1 SCHEDULE FOR BMP IMPLEMENTATION

BMPs will be implemented as per the schedule indicated in Table 3-1.

Table 3-1 BMP Implementation Schedule

BMP Location Implementation Duration

E r o s io n o n tr o l

B M s

EC-1, Scheduling Prior to

Construction Segment Completion e d im e n t C o n tr o l B

M

SE-5, Fiber Rolls Around contractor designated management area

Start of Construction

Segment Completion

SE-7, Street Sweeping Along Street Curb an Gutters

Start of Construction

Segment Completion

SE-10, Storm Drain Inlet Protection

Around Storm Drain Inlets

Start of Construction

Segment Completion

SE-8

Around contractor designated management area

Start of Construction

Segment Completion

W in d r o s io n tr o l B

M P s WE-1, Wind Erosion

Control Entire Site Start of

Construction

T a c k in g n tr o l

B M

P s TC-1, Stabilized

Construction Entrance and Exit

TBD by Contractor Start of Construction

Segment Completion

TC-3, Entrance Outlet Tire Wash

TBD by Contractor Start of Construction

N n -S to r m w a te r C o n tr o l B

M

NS-1

Entire Site Start of

Construction Entirety of Project

NS-3

Designated Area Start of

Construction Entirety of Project

NS-6

Entire Site Start of

Construction Entirety of Project

NS-7

Designated Area Start of

Construction Entirety of Project

NS-8

Designated Area Start of

Construction Entirety of Project

SHR Aviation Flight Line Pavement Replacement 3-2 March 2026

Table 3-1 BMP Implementation Schedule

BMP Location Implementation Duration

NS-9

Designated Area Start of

Construction Entirety of Project

NS-10

Designated Area Start of

Construction Entirety of Project

NS-12

Entire Site Start of

Construction Entirety of Project

NS-13

Entire Site Start of

Construction n s tr u c ti

M a te r ia l C o n tr o l B

M

W s te

M a n a g e m e n t

C o n tr o l

B M

WM-1

TBD by Contractor Start of

Construction Entirety of Project

WM-2

TBD by Contractor Start of

Construction Entirety of Project

WM-3

TBD by Contractor Start of

Construction Entirety of Project

WM-4

TBD by Contractor Start of

Construction

WM-5

TBD by Contractor Start of

Construction Entirety of Project

WM-6

TBD by Contractor Start of

Construction Entirety of Project

WM-7

TBD by Contractor Start of

Construction Entirety of Project

WM-8

TBD by Contractor Start of

Construction Entirety of Project

WM-9

TBD by Contractor Start of

Construction Entirety of Project

WM-10

TBD by Contractor Start of

Construction

SHR Aviation Flight Line Pavement Replacement 3-3 March 2026

3.2 EROSION AND SEDIMENT CONTROL

Erosion and sediment controls are required by the 2022 CGP to provide effective reduction or elimination of sediment related pollutants in stormwater discharges and authorized non-stormwater discharges from the Site. Applicable BMPs are identified in this section for erosion control, sediment control, tracking control, and wind erosion control.

3.2.1 Erosion Control

Erosion control, also referred to as soil stabilization, consists of source control measures that are designed to prevent soil particles from detaching and becoming transported in stormwater runoff. Erosion control BMPs protect the soil surface by covering and/or binding soil particles.

This construction project will implement the following practices to provide effective temporary and final erosion control during construction:

1. Preserve existing vegetation where required and when feasible.

2. The area of soil disturbing operations shall be controlled such that the Contractor is able to implement erosion control BMPs quickly and effectively.

3. Stabilize non-active areas within 14 days of cessation of construction activities or sooner if stipulated by local requirements.

4. Control erosion in concentrated flow paths by applying erosion control blankets, check dams, erosion control seeding, or alternate methods.

5. Prior to the completion of construction, apply permanent erosion control to remaining disturbed soil areas.

Sufficient erosion control materials shall be maintained onsite to allow implementation in conformance with this SWPPP.

The following erosion control BMP selection table, Table 3-2 indicates the BMPs that will be implemented to control erosion on the construction site. Fact Sheets for temporary erosion control BMPs are provided in Appendix G.

These temporary erosion control BMPs shall be implemented in conformance with the following guidelines and as outlined in the BMP Factsheets provided in Appendix G. If there is a conflict between documents, the Site Map will prevail over narrative in the body of the SWPPP or guidance in the BMP Fact Sheets. Site specific details in the Site Map prevail over standard details included in the Site Map. The narrative in the body of the SWPPP prevails over guidance in the BMP Fact Sheets.

SHR Aviation Flight Line Pavement Replacement 3-4 March 2026

Table 3-2 Erosion Control BMPs

CASQA

Fact Sheet

BMP Name Considered for the Project (1)

BMP Used If not used, state reason and alternate BMP, if applicable

YES NO

EC-1 Scheduling ✓ ✓

EC-2

Preservation of Existing Vegetation

✓ ✓ Minimal quantity of existing vegetation

EC-3 Hydraulic Mulch ✓(2) ✓ Minimal quantity of unpaved area, existing landscape to be preserved

EC-4 Hydroseed ✓(2) ✓ Minimal quantity of unpaved area, existing landscape to be preserved

EC-5 Soil Binders ✓(2) ✓ Minimal quantity of unpaved area, existing landscape to be preserved

EC-6 Straw Mulch ✓(2) ✓ Minimal quantity of unpaved area, existing landscape to be preserved

EC-7 Geotextiles and Mats ✓(2) ✓ Minimal quantity of unpaved area, existing landscape to be preserved

EC-8 Wood Mulching ✓(2) ✓ Minimal quantity of unpaved area, existing landscape to be preserved

EC-9

Earth Dike and Drainage Swales

✓(3) ✓ Offsite run-on is not anticipated

EC-10 Velocity Dissipation Devices ✓(3) ✓ There are no pipe or channel outlets onsite

EC-11 Slope Drains ✓(3) ✓ No areas of concentrated flows onsite

EC-12 Stream Bank Stabilization ✓ There are no channels or streams onsite

EC-14 Compost Blankets ✓(2) ✓ Minimal quantity of unpaved area, existing landscape to be preserved

EC-15 Soil Preparation-Roughening ✓ ✓ Minimal quantity of unpaved area, existing landscape to be preserved

EC-16…