Attachment 11 Appendix 10 - HAFB SWMP 20250121.pdf

Department of the Air Force

Storm Water Management Plan

Hanscom

Installation Supplement

EPA NPDES Permit Number: MAR042029

About This Plan

Certification

Document Control

1 Overview and Scope

2 Installation Profile

3 Environmental Management System

4 General Roles and Responsibilities

5 Training

6 Recordkeeping and Reporting

7 Minimum Control Measures and Best Management Practices

7.1 Public Education and Outreach

7.2 Public Involvement / Participation

7.3 Illicit Discharge Detection and Elimination

7.4 Construction Site Runoff Control

7.5 Post-Construction Runoff Control

7.6 Pollution Prevention / Good Housekeeping

8 References

9 Acronyms

10 Definitions

11 Installation-Specific Content

Appendix A - Hanscom AFB NO1 for Coverage Under Small MS4 General Permit

Appendix B - 2016 MA Small MS4 General Permit

Appendix C - Endangered Species Documentation

Appendix D - Historic Properties Documentation

Appendix E - Public Education and Outreach Program

Appendix F - Illicit Discharge, Detection, and Elimination (IDDE) Program

Appendix G - Construction Site Stormwater Runoff Control Program

Appendix H - Stormwater Management in New Development and Redevelopment (Post Construction Stormwater Runoff Program)

Appendix I - Operations and Maintenance Program

Appendix J - Stormwater Pollution Prevention Plan

ABOUT THIS PLAN

This installation-specific Environmental Management Plan (EMP) is based on the U.S. Air Force’s (AF) standardized Storm Water Management Plan (SWMP) template. This plan is not an exhaustive inventory of all storm water requirements and practices. Where applicable, external resources, including Air Force Instructions (AFIs); Air Force Manuals (AFMANs); AF Playbooks; federal, state, local, and Final Governing Standards (FGS); and permit requirements are referenced.

Each section of this plan begins with standardized, AF-wide “common text” language that addresses AF and Department of Defense (DoD) policy and federal requirements. This common text language is restricted from editing to ensure that it remains standard throughout all plans. The common text language is maintained and updated by the designated Office of Primary Responsibility (OPR) with assistance from the Office of Collateral Responsibility (OCR), as appropriate. Immediately following the AF-wide common text sections are Installation sections. The Installation sections contain installation-specific content to address state, local, and installation-specific requirements. Installation sections are unrestricted and are maintained and updated by AF environmental Sections and/or installation personnel.

This document is optimized to be accessed and viewed electronically. The eDASH website at https://usaf.dps.mil/teams/eDASH is the primary communication tool for AF EMPs.

This AF standardized template may differ in format and organization from other templates developed by regulatory agencies or other organizations. If applicable, a cross-reference table of sections is included below to simplify review.

Installation Supplement

The Hanscom Air Force Base (HAFB) SWMP incorporates new requirements for the General Permit for Stormwater Discharges from Small Municipal Separate Storm Sewer Systems in Massachusetts (2016 MA Small MS4 General Permit) which was anticipated to become effective on July 1, 2017. However, on June 29, 2017, the United States (U.S.) Environmental Protection Agency (USEPA) postponed the July 1, 2017 effective date of the 2016 MA Small MS4 General Permit for one year, to July 1, 2018.

Cross-Reference: AF SWMP Template and MassDEP Template

MassDEP Template Section Title

MassDEP Template Section Number

AF Template Section Title AF Template Section Number

Certification Page 1 Certification Page 4 Background Page 2 Overview and Scope Section 1.0 Small MS4 Authorization Page 3 Installation – Specific Content Section 11.0 Stormwater Management Program Team

Page 4 General Roles and Responsibilities

Section 4.0

Receiving Waters Page 5 Installation – Specific Content Section 11.0 Eligibility: Endangered Species and Historic Properties

Page 6 Installation – Specific Content Section 11.0

MCM 1 through MCM 6 Page 7-29 Minimum Control Measures and Best Management Practices

Section 7.0

Annual Evaluation Page 30 Recordkeeping and Reporting Section 6.0 TMDLs and Water Quality Limited Waters

Page 32-47 Installation – Specific Content Section 11.0

CERTIFICATION

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 gathered and evaluated 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.

Responsible Official Certification https://usaf.dps.mil/teams/eDASH

Printed Name: Thomas J. Schluckebier, P.E., CFM, LEED AP Date: 12/26/2023 Signature: Signature provided within the attached Memorandum Title: Base Civil Engineer

[SIGNATURE]

DOCUMENT CONTROL

Standardized SWMP Template

In accordance with (IAW) the Air Force Civil Engineer Center (AFCEC) Environmental Directorate (CZ) Business Rule (BR) 08, EMP Review, Update, and Maintenance, the standard content in this SWMP template is reviewed periodically, updated as appropriate, and approved by the Water Quality Subject Matter Expert (SME).

This version of the template is current as of 10/22/2021 and supersedes the 2020 version.

NOTE: Installations are not required to update their SWMPs every time this template is updated. When it is time for installations to update their SWMPs, installations should adopt the most recent version of this template available.

Installation SWMP

Record of Updates

The SWMP is updated as changes to requirements and management practices occur, including those driven by changes in applicable regulations and permits.

Record of Review

The SWMP must be reviewed and revised on an annual basis, or as required by the permit. The plan is approved by the Environmental, Safety, and Occupational Health Council (ESOHC) and other organizations, as required. Formatting and administrative changes do not require additional review and approval.

Installation Supplement

Record of Updates

Change No. Nature of Change Date of Change Approved By:

Chg 4 Chg 3 Administrative/Update 12/26/2023 BCE, CEX, CEIE Chg 2 Administrative/Update 01/12/2023 BCE, CEX, CEIE

Record of Review

Review Date Review Participants Notes/Remarks Results in Plan Update (Yes or No)

1 OVERVIEW AND SCOPE

AF installations that operate a Municipal Separate Storm Sewer System (MS4) in an Urbanized Area (UA) are regulated as small MS4s pursuant to the Storm Water Phase II Final Rule of the National Pollutant Discharge Elimination System (NPDES) permitting program of the Clean Water Act. Covered installations must obtain coverage under a small MS4 storm water permit from the appropriately authorized permitting authority and implement a storm water management program.

The primary objective of this SWMP is to reduce the discharge of pollutants to storm water to the maximum extent possible (MEP).

Pollutant discharge reduction will be accomplished by implementing best management practices (BMPs) and measurable goals for the following six minimum control measures (MCMs):

Public Education and Outreach Public Involvement / Participation Illicit Discharge Detection and Elimination Construction Site Runoff Control Post-Construction Runoff Control Pollution Prevention / Good Housekeeping

1.1. On May 1, 2003, the Environmental Protection Agency (EPA) Region 1 issued its Final General Permit for Stormwater Discharges from Small Municipal Separate Storm Sewer Systems (2003 Small MS4 permit), consistent with the Phase II rule. The 2003 Small MS4 permit covered "traditional" (e.g., cities and towns) and "non-traditional" (e.g., Federal and state agencies) MS4 Operators located in the states of Massachusetts and New Hampshire. This permit expired on May 1, 2008 but remained in effect until operators were authorized under the 2016 MA Small MS4 General Permit, which became effective on July 1, 2018. The 2016 MA Small MS4 General Permit will remain in effect for discharges that were authorized prior to July 1, 2023 until such discharges are authorized under a reissued general permit, individual permit, or other alternative general permit

1.2. HAFB is located about 20 miles northwest of Boston, Massachusetts, within the historical towns of Bedford, Lexington, Lincoln, and Concord. The total military and civilian workforce, including contractors, at HAFB is approximately 11,000 people. The largest tenant unit on the installation is the Air Force Life Cycle Management Center (AFLCMC). In addition to this primary function, Hanscom supports the Air Force Nuclear Weapons Center (AFNWC), MIT Lincoln Laboratory (MIT/LL), the MITRE Corporation, the Massachusetts National Guard Joint Forces Headquarters (MANG JFHQ), the Joint Personal Property Shipping Office (JPPSO), the Defense Contract Management Agency (DCMA), and various other companies and groups related to the Department of Defense (DOD). The host unit at Hanscom is the 66th Air Base Group (66 ABG) which provides logistics, Civil Engineering (CE), Fire and Emergency Services, Security Forces, and other installation support functions. The base also provides all functions and services to support the families that occupy the privatized family housing area within the installation perimeter fence. The housing area residences, streets, parking areas, infrastructure, and utilities are not owned by HAFB and therefore are excluded from the MS4 stormwater permit area.

1.3. The HAFB stormwater system is interconnected on the Massachusetts Port (MASSPORT) Authority-owned, adjacent airfield, with stormwater discharges from the MASSPORT Hanscom Field stormwater systems. The HAFB stormwater system discharges into the Shawsheen River in Bedford (designated Class B surface water used for drinking water), and into the Kiln Brook in Lexington which flows into the Shawsheen River. HAFB is a military base and discharges into the waters of the U.S., which is part of the eligibility criteria for the Small MS4 Permit under the Phase II Storm Water Regulations. HAFB is a federal facility and is therefore a non-traditional MS4 as defined in Section 5.0 of the 2016 MA Small MS4 General Permit.

1.4. In the Massachusetts Year 2022 Integrated List of Waters, the Massachusetts Department of Environmental Protection (MassDEP) lists the Shawsheen River Headwaters (Segment ID MA83-08) as impaired due to pathogens and habitat alterations. Additionally, HAFB is located within the municipality of Bedford, which is listed in Part 2.2.2.b of the 2016 MA Small MS4 General Permit as containing waterbodies, or their tributaries, that are impaired due to phosphorus. Therefore, this Stormwater Management Plan (SWMP) adheres to the requirements of 2016 MA Small MS4 General Permit, Appendix F Part A.III, and Appendix H II and III.

1.5. The current SWMP, including all MS4 mapping, will be available for public review and input upon request via contact with the HAFB Stormwater Coordinator at nicholas.turbesi@us.af.mil. A copy of HAFB’s Notice of Intent (NOI) and a copy of the 2016 MA Small MS4 General Permit are kept in the 66 ABG, CE Installation Management Flight, Environmental Element (66 ABG/CEIE) official files.

2 INSTALLATION PROFILE

Installation Supplement

Installation Profile

Scope of Plan HAFB and tenants including the Massachusetts Institute of Technology Lincoln Laboratory (MIT/LL) area, but excluding the privatized housing area.

OPR The 66th Civil Engineering (CE) Directorate, Installation Management Flight, Environmental Engineering Element (66 ABG/CEIE) has overall responsibility for implementing the Stormwater Management Program and is the lead organization for monitoring compliance with applicable federal, state, and local stormwater regulations.

Responsible Official Renata Welch Water Quality Program Manager Nicholas Turbesi Permitting Authority USEPA and MassDEP MS4 Permit Number MAR042029

MS4 Permit Expiration Date Indefinite - the US Environmental Protection Agency (USEPA) administratively continued this permit on 16 May 2022 until such time as a new one can be written.

Applicable Federal and AF regulatory references Clean Water Act as Amended 1972 AFI 32-7001, Environmental Management, 23 August 2019 AFMAN 32-1067, Water and Fuel Systems, 19 August 2022

Applicable State and local regulatory references 2016 MA Small MS4 General Permit

3 ENVIRONMENTAL MANAGEMENT SYSTEM

The DAF environmental program adheres to the Environmental Management System (EMS) framework and its "Plan, Do, Check, Act" cycle for ensuring mission success. Executive Order (EO) 14057, Catalyzing Clean Energy Industries and Jobs Through Federal Sustainability; DoDI 4715.17, Environmental Management Systems; DAFI 32-7001 Environmental Management; and International Organization for Standardization (ISO) 14001 standard, Environmental Management Systems – Requirements with guidance for use, provide guidance on how environmental programs should be established, implemented, and maintained to operate under the EMS framework.

The Storm Water Management Program employs EMS-based processes to achieve compliance with all legal obligations and current policy drivers, effectively manage associated risks, and instill a culture of continual improvement. The SWMP serves as an administrative operational control that defines compliance-related activities and processes.

4 GENERAL ROLES AND RESPONSIBILITIES

Storm water management requires the full involvement of all organizations and personnel on the installation, including contractors, tenants, and family members living on the installation. The major roles/organizations involved in supporting the storm water management program at a typical installation include:

Installation Commander Base Civil Engineer Flight Chief, Installation Management Water Quality Program Manager Storm Water Pollution Prevention Team Unit Environmental Coordinator (UEC) Installation Personnel

AFCEC

Additional organizational and personnel roles and responsibilities for storm water management are described throughout this plan and in referenced documents. Detailed information about typical responsibilities is available in AFMAN 32-1067, AFI 32-7001, and the Water Quality Playbook. Additional installation-specific roles and responsibilities are documented in the BMPs below.

Installation Supplement

The HAFB Stormwater Coordinator is Nicholas Turbesi, a member of the 66th Civil Engineering (CE) Directorate, Installation Management Flight, Environmental Engineering Element (66/ABG/CEIE). Mr. Turbesi is the primary person responsible for directing and coordinating the HAFB Small MS4 Program. The Stormwater Coordinator ensures appropriate implementation and documentation of all best management practices (BMPs), measurable goals, and evaluation metrics for minimum control measures.

The Stormwater Coordinator will not perform every activity or task required under the program individually; rather, they direct and designate other personnel within the CE Installation Management Flight, Environmental Engineering Element, and within other base offices and organizations to perform or conduct various activities.

5 TRAINING

AF installations implement storm water training programs to ensure that installation personnel, contractors, and visitors are aware of their role in the program and the importance of their participation to its success. DoDI 4715.10, Environmental Education, Training, and Career Development, implements policy and provides the procedures for environmental education, training, and career development programs for DoD personnel. AF installations ensure that appropriate personnel complete required education, training, and certification necessary to perform their jobs. Priority is given to the use of AF-approved education/training sources such as the Air Force Institute of Technology (AFIT) training courses and official AF-approved computer-based training resources (e.g., The Environmental Awareness Course Hub [TEACH], myLearning, ArcNet, etc.) to meet training needs.

Specific training requirements are outlined in the BMPs below. Training records are maintained in IAW the Recordkeeping and Reporting section of this plan.

Installation Supplement

All HAFB MS4 personnel authorized to review plans, conduct site inspections, or manage construction projects are encouraged to complete the Air Force Institute of Technology (AFIT) Construction Site Stormwater Seminar online training program. Personnel involved in the Illicit Discharge Detection and Elimination (IDDE) Program will receive IDDE Training annually, at a minimum.

Additionally, all new civil Engineering (CE) Directorate, Installation Management Flight, Environmental Engineering Element (66 ABG/CEIE) employees will receive Stormwater Awareness Training within 90 days of hire. This training is given by the 66 ABG/CEIE Stormwater Coordinator.

6 RECORDKEEPING AND REPORTING

All AF MS4s have measures in place to ensure compliance with applicable permit recordkeeping and reporting requirements. Records are stored and maintained IAW AFMAN 33-363, Management of Records, and records are archived and disposed IAW the Air Force Records Information Management System (AFRIMS) Records Disposition Schedule (RDS).

Installation Supplement

6.1. Records of information required by the 2016 MA Small MS4 General Permit must be kept for five years. These records include monitoring results, reports, records of screening, follow-up and elimination of illicit discharges, maintenance records, inspection records, and data used to develop the Notice of Intent (NOI), this plane, Stormwater Pollution Prevention Plans (SWPPPs), and annual reports. These records must be submitted upon request by the permitting authority, and must be available to the public. Public access to the record will be managed through the HAFB Stormwater Coordinator, releasable only when a written request is received due to national security sensitivity.

6.2. The Civil Engineering (CE) Directorate, Installation Management Flight, Environmental Engineering Element (66 ABG/CEIE) will submit an annual report to regulatory agencies no later than 30 September of each year. The annual report will contain information regarding the activities of the previous calendar year, follow the template provided by the Environmental Protection Agency (EPA), and will generally contain the following (subject to change based on EPA standardized reporting requirements):

6.2.1. A self-assessment review of the compliance with the permit conditions.

6.2.2. An assessment of the appropriateness of the selected best management practices (BMPs).

6.2.3. The status of any plans or activities required by Permit Part 2.1 (Water Quality- Based Effluent Limitations) and/or Permit Part 2.2 (Discharges to Certain Impaired Waters), including:

6.2.3.1. Identification of all discharges determined to be causing or contributing to an exceedance of water quality standards, and a description of response including items required in Permit Part 2.2.1.

6.2.3.2. For discharges subject to total maximum daily load (TMDL) requirements, identification of specific BMPs used to address pollutants causing the impairment, an assessment of the BMPs’ effectiveness at controlling the pollutant, and any deliverables required by Massachusetts (MA) MS4 General Permit Appendix F (enhanced BMPs identified in Section 3).

6.2.3.3. For discharges to water quality-limited waters, a description of each BMP required by MA MS4 General Permit Appendix H, and any deliverables required by Appendix H (enhanced BMPs identified in Section 3).

6.2.4. An assessment of progress towards achieving measurable goals including:

6.2.4.1. An evaluation of the public education program.

6.2.4.2. A description of activities used to promote public participation.

6.2.4.3. A description of activities related to implementation of the Illicit Discharge, Detection, and Elimination (IDDE) Program, and the effectiveness of the IDDE Program.

6.2.4.4. An evaluation of construction runoff management.

6.2.4.5. An evaluation of stormwater management for new development and re-development.

6.2.4.6. The status of operations and maintenance (O&M) programs and Stormwater Pollution Prevention Plans (SWPPPs), including inspection results .

6.2.4.7. Reporting for surface water drinking supplies.

6.2.5. A summary of collected and analyzed data.

6.2.6. A discussion of activities for the next reporting cycle.

6.2.7. A discussion of any changes in BMPs or measurable goals.

6.2.8. Information regarding any reliance on another entity for achieving any measurable goal, or for implementing any control measure.

6.2.9. Outfall monitoring results from the current reporting period as well as the entire permit period.

6.2.10. Results from any other stormwater or receiving water quality monitoring or studies from the reporting period.

6.2.5. Annual Reports will be filed in the 66 ABG/CEIE official files.

7 MINIMUM CONTROL MEASURES AND BEST MANAGEMENT PRACTICES

AF MS4 storm water management programs are comprised of at least six MCMs that collectively are designed to reduce pollutants discharged to receiving bodies to the MEP. BMPs and measurable goals are implemented and monitored for each MCM as described below. Where required, all AF MS4s have developed regulatory mechanisms to enforce requirements in the general permit. These mechanisms are included in the appropriate sections below.

7.1 Public Education and Outreach

All AF MS4s implement public education and outreach programs to educate the installation population on the impact that their common, daily activities and behaviors can have on installation storm water runoff and local water resources. These programs include general storm water pollution awareness and guidance on actions that can be taken to reduce the potential storm water pollution from their activities.

Example Public Education and Outreach BMPs include:

Develop a communication and outreach strategy, including your goals, target audience, distribution methods, and available resources Develop outreach materials, including pamphlets, displays, signs, etc.

Develop a public awareness campaign for installation personnel on pet waste management Develop a public awareness campaign for installation personnel on trash management

Installation-specific BMPs are described in the installation supplement below.

Installation Supplement

Documentation related to Public Education and Outreach best management practices (BMPs) is maintained in the 66 ABG/CEIE official files.

Public Education and Outreach

BMP Title Facility Manager's Briefing Presentation Description HAFB will brief stormwater quality issues and guidance at the Facility Manager's

Briefing.

Target Audience Businesses, institutions, commercial facilities Measurable Goals Perform one briefing presentation every other year.

Target Date Every other year Responsible Individual(s) 66th Civil Engineering (CE), Installation Management Flight, Environmental

Engineering Element (66 ABG/CEIE) Status Ongoing

BMP Title Construction Project Kick-Off Meetings Description HAFB will brief stormwater quality issues, permit requirements, and inspection reporting at the kick-off meeting for each construction project on base that has the potential to affect storm water.

Target Audience Developers (construction) Measurable Goals Perform a kick-off meeting for every construction project with the potential to affect stormwater.

Target Date As needed Responsible Individual(s) CE Engineering Flight (66 ABG/CEN), and 66 ABG/CEIE.

Status Occurring for all projects with the potential to affect stormwater.

BMP Title Annual Industrial Operational Unit Briefings Description HAFB will brief equipment inspection and maintenance, proper storage of industrial materials, proper management and disposal of wastes, proper management of dumpsters, minimization of use of salt or other de-icing materials, proper disposal of yard waste, proper storage of salt and other de-icing materials, and proper maintenance of parking lot surfaces (sweeping) to the identified audiences.

Target Audience Industrial facilities (CE Roads and Grounds, CE Operations supervisors, Auto Hobby shop, Logistic Readiness Squadron, Lawn Maintenance)

Measurable Goals Host one briefing every year Target Date Annually Responsible Individual(s) 66 ABG/CEIE Status Ongoing

BMP Title Contractor Environmental Guide Description HAFB will provide the Contractor Environmental Guide which covers the significant environmental aspects and impacts that contractors often influence at HAFB. The guide outlines the environmental requirements that relate to performing work on the installation, and includes the Environmental Management System (EMS) requirements. The guide must be signed by contractors before work may proceed.

Target Audience Developers (construction) Measurable Goals The guide must be signed by all contractors before work may proceed.

Target Date As needed Responsible Individual(s) Engineering Flight (66 ABG/CEN) Status Completed for all contract work occurring on the installation

BMP Title Hanscom AFB Facility Manager's Guide Description All Facility Managers receive the Installation Facility Manager's Guide which covers all aspects of facility management and includes environmental management requirements.

Target Audience Businesses, Institutions, Commercial Facilities

Measurable Goals Distribute the Facility Manager's Guide to all Facility Managers Target Date As needed Responsible Individual(s) CE Customer Service (66 ABG/CEOER) Status Complete. New Facility Managers receive the Installation Facility Manager's Guide upon appointment, and all Facility Managers receive the current guide whenever it is updated. The guide is also posted to the Facility Managers SharePoint: https://usaf.dps.mil/sites/21911/CE/Facilities/Forms/AllItems.aspx?

viewpath=%2Fsites%2F21911%2FCE%2FFacilities%2FForms%2FAllItems%2Easpx

BMP Title Educational Displays, Posters, and/or Kiosks Description Annual Middle School Earth River Clean-up OR Educational Program Target Audience Students/Residents Measurable Goals HAFB will organize and host an annual earth day program or river clean-up day.

Target Date Annually Responsible Individual(s) 66 ABG/CEIE Status Ongoing

BMP Title Annual Newspaper Article, Press Release, The Blast (base wide email), and/or Social Media Posting

Description HAFB will issue at least one of the above annually discussing stormwater quality Target Audience All Audiences Measurable Goals Issue at least one of the above each year.

Target Date Annually Responsible Individual(s) Public Affairs (66 ABG/PA) Status Ongoing

BMP Title 24/7 Storm Water Hotline Description HAFB will continue to operate a stormwater hotline as part of its 24/7 customer service phone line.

Target Audience All Audiences Measurable Goals Maintain 24/7 customer services phone line.

Target Date Ongoing Responsible Individual(s) CE Customer Service (66 ABG/CEOER) Status Ongoing

The following BMPs satisfy the MA MS4 General Permit Appendix H, Part II and Part III educational requirements for reduction of total phosphorus and bacteria and pathogens, respectively: Industrial Operational Unit Briefings, and Installation Facility Manger's Guide.

7.2 Public Involvement / Participation

All AF MS4s comply with applicable public notice requirements associated with their storm water management program. In addition to the public notice, AF MS4 storm water management programs encourage the involvement of the installation population in all facets of the program, from developing BMPs to performing installation cleanup activities.

Example Public Involvement / Participation BMPs include:

Stream cleanup and monitoring events Wetland planting events Installation storm drain marking

Installation-specific BMPs are described in the installation supplement below.

Public Involvement / Participation Best Management Practices (BMPs)

BMP Title Meetings Description Facility Manager's Briefing Presentation Measurable Goals HAFB will brief stormwater quality issues and guidance at the Facility Managers briefing. Input from facilities/Facility Managers will be recorded via meeting minutes.

Target Date Every other year Responsible Individual(s) Civil Engineering (CE) Installation Management Flight, Environmental Engineering

Element (66 ABG/CEIE) Status Ongoing

BMP Title Meetings Description Annual Industrial Operational Unit Briefings Measurable Goals HAFB will brief equipment inspection and maintenance, proper storage of industrial materials, proper management and disposal of wastes, proper management of dumpsters, minimization of use of salt or other de-icing materials, proper storage of salt and other de-icing materials, and proper maintenance of parking lot surfaces (sweeping) to the identified audiences. Input from Industrial Operators regarding BMPs will be recorded via meeting minutes.

Target Date Annually Responsible Individual(s) 66 ABG/CEIE Status Ongoing

BMP Title Hotline Description 24/7 Storm Water Hotline Measurable Goals HAFB will continue to operate a stormwater hotline as part of its 24/7 customer service phone line.

Target Date Ongoing Responsible Individual(s) CE Customer Service (66 ABG/CEOER) Status Ongoing

Additionally, access to MS4 related documents, including the this plan and minimum control measures (MCM) plans, is provided through a SharePoint site. This plan contains sensitive information regarding the infrastructure of the military installation; therefore, access to the SharePoint site must be requested and approved by the Stormwater Coordinator upon public request.

7.3 Illicit Discharge Detection and Elimination

All AF MS4s have measures in place to detect and eliminate illicit discharges to the storm water system. Illicit discharges include intentional non-storm water discharges and incidental non-storm water discharges. Installation illicit discharge detection and elimination measures include both proactive and reactive measures for preventing or limiting these types of discharges.

Example Illicit Discharge Detection and Elimination BMPs include:

Develop a storm sewer system map Establish an ordinance, regulatory mechanism, or other binding agreement, as appropriate, prohibiting non-storm water discharges Develop a plan to detect and prevent illicit discharges Educate installation personnel on the hazards associated with illicit discharges

Installation-specific BMPs are described in the installation supplement below.

7.3.1. Documentation related to the Illicit Discharge Detection and Elimination (IDDE) Program is maintained in the Civil Engineering (CE), Installation Management Flight, Environmental Engineering Element (66 ABG/CEIE) official files, and includes a storm sewer system map, Annual Outfall Inventory and Priority Ranking Update, Sanitary Sewer Overflow (SSO) inventory, visual and analytical sampling procedures, and tracking sheets. The Central Massachusetts Regional Stormwater Coalition (CMRSWC) offers a 2016 MA Small MS4 General Permit compliant IDDE Program template which was used to develop HAFB’s IDDE Program.

7.3.2. Develop written IDDE Program. The 2019 IDDE Program is included as Attachment F to this plan. IDDE procedures will be updated annually to reflect the milestones listed in Section 2.3.4.6 of the 2016 MA Small MS4 General Permit, the annual outfall inventory update, and any illicit discharge occurrences. IDDE training will be provided annually at a minimum to employees involved in the IDDE Program. When IDDE tasks are outsourced to a contractor, HAFB reserves the right to include training requirements within the contracting statement of work.

7.3.3. HAFB tracks IDDE Program progress by reporting the following in each annual report:

7.3.3.1. The number of SSOs and illicit discharges identified and removed.

7.3.3.2. The number and percent of total outfall catchments served by the MS4 evaluated using the catchment investigation procedure.

7.3.3.3. All wet and dry weather screening and sampling results, and the volume of sewage removed.

7.3.4. The following IDDE best management practices (BMPs) listed in HAFB’s Notice of Intent (NOI) have been completed:

7.3.4.1. Develop SSO Inventory.

7.3.4.2. Develop written IDDE Program.

7.3.4.3. Develop storm sewer system map (Phase I).

7.3.4.4. Conduct dry weather outfall screening.

7.3.5. Active BMPs are described below:

Illicit Discharge Detection and Elimination

BMP Title Storm Sewer System Map (Phase II) Description Create Phase II map and update during IDDE program completion.

Measurable Goals Update map annually and complete full system map 10 years after effective date of permit.

Target Date 2028 Responsible Individual(s) CE Engineering Flight, GEOBASE

(66 ABG/CENME)

Status Ongoing

BMP Title Implement IDDE program Description Implement catchment investigations according to IDDE Program and permit conditions.

Measurable Goals Complete 10 years after effective date of permit.

Target Date 2028 Responsible Individual(s) External 66 ABG/CEIE Contractor Status Ongoing

BMP Title Employee training Description Train employees on IDDE implementation Measurable Goals Train annually Target Date 2019 start, annually Responsible Individual(s) 66 ABG/CEIE

Status Ongoing

BMP Title Conduct wet weather screening Description Conduct in accordance with the outfall screening procedure in IDDE Program.

Measurable Goals Complete 10 years after effective date of permit Target Date 2028 Responsible Individual(s) External 66 ABG/CEIE Contractor Status Ongoing

BMP Title Ongoing screening Description Conduct dry and wet weather screenings (as necessary).

Measurable Goals Complete ongoing outfall screening in accordance with procedures in IDDE program Target Date 2028 Responsible Individual(s) External 66 ABG/CEIE Contractor Status Pending Implementation

7.4 Construction Site Runoff Control

All AF MS4s have measures in place to reduce discharges to storm water of sediment and other potential pollutants from construction sites disturbing one or more acres of land.

Example Construction Site Runoff Control BMPs include:

Establish an ordinance, regulatory mechanism, or other binding agreement, as appropriate, requiring erosion and sediment control Implement erosion and sediment control measures Establish procedures for controlling construction waste Develop a procedure to review construction site plans for proper sediment control Develop a procedure for collecting and considering installation personnel information and feedback Conduct inspections and enforce storm water requirements at construction sites

Installation-specific BMPs are described in the installation supplement below.

Installation Supplement

7.4.1. Documentation related to the Construction Site Storm Water Runoff Control Program is maintained in the Civil Engineering, Installation Management Flight, Environmental Engineering Element (66 ABG/CEIE) official files. The Construction Site Storm Water Runoff Control program includes requirements for all land disturbing activities greater than 5,000 square feet, and reduced requirements for small projects with a footprint less than 5,000 square feet. Construction operators are required to develop a sediment and erosion control plan, or adhere to the sediment and erosion control plan prepared by the CE Engineering Flight (66 ABG/CEN) that is included in the project statement of work. All construction generated waste must be disposed of in accordance with local regulations and Section 2.3 of the National Pollutant Discharge Elimination System (NPDES) Construction General Permit (CGP).

Discharge of waste to the MS4 is forbidden.

7.4.2. The following construction site runoff control best management practices (BMPs) listed in HAFB's Notice of Intent (NOI) have been completed:

7.4.2.1. Develop site inspection and enforcement of Erosion and Sediment Control measures

7.4.2.2. Develop Site Plan review procedures.

7.4.2.3. Develop and distribute Erosion and Sediment Control Plan requirements for construction operators.

7.4.2.4. Waste Control requirement in accordance with the NPDES CGP Section 2.3 and local regulations have been adopted.

7.4.3. Active best management practices (BMPs) are described below:

Construction Site Storm Water Runoff Control

BMP Title Site Plan Review Implementation Description A site plan will be developed by HAFB or the contracting party for all applicable projects. The CE Engineering Flight (66 ABG/CEN) will review all site plans to ensure they meet the minimum requirements in the Construction Site Runoff Control Program.

Measurable Goals HAFB will review all site plans.

Target Date Ongoing Responsible Individual(s) 66 ABG/CEN Status Implemented

BMP Title Site Inspection of Erosion and Sediment Control Measures Implementation Description Site Operators will inspect erosion and sediment control measures at the intervals outlined in the Construction Site Runoff Control Plan. 66 ABG/CEN will review site operator inspection reports and perform an inspection at least monthly. Inspections will be performed using the procedures included within the Construction Site Runoff Control plan or a comparable procedure.

Measurable Goals Inspections are performed at intervals outlined in the plan.

Target Date Ongoing Responsible Individual(s) 66 ABG/CEN and Contractors Status Implemented

7.5 Post-Construction Runoff Control

All AF MS4s have measures in place to reduce discharges to storm water of sediment and other potential pollutants from new and/or redevelopment projects.

Example Post-Construction Runoff Control BMPs include:

Develop strategies for implementing both structural and non-structural BMPs in development projects Establish an ordinance, regulatory mechanism, or other binding agreement, as appropriate, addressing post-construction runoff Implement a program to ensure adequate long-term operation and maintenance of BMPs

Installation-specific BMPs are described in the installation supplement below.

Installation Supplement

7.5.1. The 2016 Massachusetts (MA) Small MS4 2016 General Permit requires the Stormwater Management in New Development and Redevelopment (Post Construction Stormwater Management) Plan be developed in accordance with Section 2.3.6(a)(ii) within two years of the effective permit date, or by July 1, 2020. The Stormwater Management in New Development and Redevelopment Plan will be developed to satisfy the permit requirements. The best management practices (BMPs) listed below will be incorporated in the program. This section will be updated upon completion of the program.

7.5.2 The following post-construction runoff control BMPs listed in the HAFB's Notice of Intent (NOI) have been completed:

7.5.2.1 Identify at least five permittee-owned properties that could be modified or retrofitted with BMPs to reduce impervious areas. The report identifying five BMP retrofits was completed in year four of the permit as required by Permit Part 2.3.6.c. The status of this BMP is ongoing as additional retrofits are to be identified annually such that HAFB maintains an inventory of at least five potential BMP retrofits.

7.5.2.2 Develop a report assessing current street design and parking lot guidelines that affect the creation of impervious cover.

The report was completed in Year four of the permit as required by Permit Part 1.10.2 and 2.3.6.b. The report recommends updates. These updates are anticipated to be completed by the end of 2025; therefore, the status of this BMP is ongoing.

7.5.3 HAFB is a Non-Traditional MS4 because it is a federal facility. As written in Permit Part 6.3, Non-Traditional MS4s are exempt from the Year Four green infrastructure evaluation requirement in Permit Part 2.3.6.c. The status of this BMP is exempt.

Post-Construction Storm Water Management

BMP Title As-built Plans for On-Site Stormwater Control Description The procedures to require submission of as-built drawings and ensure long term operation and maintenance will be a part of this plan.

Measurable Goals Require submission of as-built plans for completed projects.

Target Date 2019 Responsible Individual(s) Civil Engineering (CE), Engineering Flight (66 ABG/CEN) Status Ongoing

BMP Title Target Properties to Reduce Impervious Areas Description Identify at least five permittee-owned properties that could be modified or retrofitted with BMPs to reduce impervious areas and update annually.

Measurable Goals Complete four years after the effective date of permit, and report annually on retrofitted properties.

Target Date 2022 Responsible Individual(s) External CE Installation Management Flight, Environmental Engineering Element (66

ABG/CEIE) contractor Status Ongoing

BMP Title Allow Green Infrastructure Description Develop a report assessing existing local regulations to determine the feasibility of making green infrastructure practices allowable when appropriate site conditions exist.

Measurable Goals Complete four years after the effective date of the permit, and implement the recommendations in the report.

Target Date 2022 Responsible Individual(s) External 66 ABG/CEIE Contractor Status Exempt

BMP Title Street Design and Parking Lot Guidelines Description Develop a report assessing requirements that affect the creation of impervious cover.

The assessment will help determine if changes to design standards for streets and parking lots can be modified to support low impact design options.

Measurable Goals Complete four years after the effective date of the permit, and implement the recommendations in the report.

Target Date 2022 Responsible Individual(s) External 66 ABG/CEIE Contractor Status The Street Design and Parking Lot Guidelines Report was completed in June 2022.

Implementation is ongoing.

BMP Title Ensure Any Stormwater Controls and/or Management Practices for New Development and Redevelopment Meet the Retention or Treatment Requirements of the Permit and All Applicable Requirements of the Massachusetts Stormwater Handbook.

Description Adoption, amendment, or modification of a regulatory mechanism to meet permit requirements. Development of a Post Construction Plan.

Measurable Goals Complete two years after the effective date of the permit

Target Date 2020 Responsible Individual(s) External 66 ABG/CEIE Contractor Status The Post Construction Stormwater Runoff Program was completed June 2020 and is included as Appendix H to this plan.

7.6 Pollution Prevention / Good Housekeeping

All AF MS4s have measures in place to identify and implement methods and practices for performing municipal operations in a manner that minimizes and prevents pollution of storm water runoff. Municipal operations may include:

Storm drain maintenance and cleaning Landscaping Road repair and infrastructure maintenance Winter road maintenance

Example Pollution Prevention / Good Housekeeping BMPs include:

Cover deicing materials when not in use Ensure proper procedures are followed when deicing roadways Ensure vehicle maintenance is performed in approved locations Perform regular street cleaning Inspect storm sewer system and conduct maintenance as necessary

Installation-specific BMPs are described in the installation supplement below.

Installation Supplement

The 2016 Massachusetts (MA) Small MS4 2016 General Permit Section 2.3.7 requires written Operations and Maintenance (O&M) Procedures, and a written Stormwater Pollution Prevention Plan (SWPPP) for select facilities within two years of the permit effective date, or by July 1, 2020. These documents have been developed and are maintained in the Civil Engineering (CE) Installation Management Flight, Environmental Engineering Element (66 ABG/CEIE) official files. The following best management practices (BMPs) listed in HAFB's Notice of Intent (NOI) have been completed. These documents are currently being developed and will be maintained in the 66 ABG/CEIE official files. The BMPs listed below will be incorporated in the program. This section will be updated upon completion of the documents.

Pollution Prevention / Good Housekeeping

BMP Title O&M procedures Description Create written O&M procedures including all requirements contained in 2.3.7.a.ii for parks and open spaces, buildings and facilities, and vehicles and equipment.

Measurable Goals Complete two years after the effective date of the permit Target Date 2020 Responsible Individual(s) External 66 ABG/CEIE Contractor Status The O&M Program was completed in February 2020 and is included as Appendix I to this plan.

BMP Title Inventory All Permittee-Owned Parks and Open Spaces, Buildings and Facilities, and Vehicles and Equipment.

Description Create inventory Measurable Goals Complete two years after the effective date of the permit.

Responsible Individual(s) External 66 ABG/CEIE Contractor

Status An inventory of all parks and open spaces has been developed and is included in the Hanscom AFB Landscape & Grounds Maintenance Plan (L&GMP) as Annex A, Appendix 1. An inventory of buildings and facilities has been developed and is managed by Real Property (66 ABG/CEIA). An inventory of HAFB maintenance vehicles has been developed and is maintained by the 66 ABG/CE Vehicle Control Officer (VCO). These inventories are reviewed and updated as necessary.

BMP Title Infrastructure O&M Description Establish and implement a program for repair and rehabilitation of MS4 infrastructure.

Measurable Goals Complete two years after the effective date of the permit.

Target Date 2020 Responsible Individual(s) External 66 ABG/CEIE Contractor Status MS4 infrastructure maintenance program is included in Appendix I, O&M Program, in this plan, and was developed in February 2020.

BMP Title Stormwater Pollution Prevention Plans (SWPPP) Description Create SWPPPs for maintenance garages, transfer stations, and other waste-handling facilities.

Measurable Goals Complete two years after the effective date of the permit.

Target Date 2020 Responsible Individual(s) External 66 ABG/CEIE Contractor Status The Hanscom AFB Base Wide SWPPP was completed July 2020 and is included as Appendix

J to this SWMP.

BMP Title Catch Basin Cleaning Description Establish a schedule for catch basin cleaning that ensures that each catch basin is no more than 50% full. Clean catch basins IAW the established schedule.

Measurable Goals Clean catch basins IAW the established schedule, report the number of catch basins cleaned, and the volume of material removed annually.

Target Date 2020 Responsible Individual(s) CE Operations Flight (66 ABG/CEO) Status The HAFB catch basin cleaning schedule and procedures are included in Appendix I in this plan.

BMP Title Street Sweeping Program Description Establish and implement a program for sweeping and/or cleaning streets and permittee-owned parking lots.

Measurable Goals Sweep all streets and permitee-owned parking lots at least once per year in the spring.

Target Date 2020 Responsible Individual(s) CE Operations Flight (66 ABG/CEO) Status The installation Street Sweeping Program is included in Appendix I in this plan.

BMP Title Road-Salt Use Optimization Program Description Establish and implement a program to minimize the use of road salt.

Measurable Goals Implement salt use optimization during deicing season.

Responsible Individual(s) CE Operations Flight (66 ABG/CEO) Status The Installation Road-Salt Optimization Plan is included in Appendix I in this plan.

8 REFERENCES

Standard References (Current Version Applicable to all AF Installations)

Federal Water Pollution Control Act (Clean Water Act) DAFMAN 32-1067, Water and Fuel Systems AFI 32-1001, Civil Engineer Operations AFI 32-7001, Environmental Management AFI 90-201, Air force Inspections System ETL 14-1, Construction and Operation and Maintenance Guidance for Storm Water Systems AF Civil Engineer Clean Water Act Playbook eDASH Water Quality Legal and Other Requirements eDASH Water Quality Program Page eDASH Training Matrix myLearning

Installation Supplement

NA

9 ACRONYMS

Standard Acronyms (Applicable to all AF Installations) eDASH Acronym Library AF Civil Engineer Clean Water Act Acronym Section

Installation Supplement

No Base Supplement Available

10 DEFINITIONS

Standard Definitions (Applicable to all AF Installations)

AF Civil Engineer Clean Water Act Playbook Definition Section Installation Supplement

NA

11 INSTALLATION-SPECIFIC CONTENT

Installation Supplement

Section 1.10.2 of the 2016 MA Small MS4 General Permit provides the information required to be included in this plan. Most of these requirements have been addressed in this plan; however, this section provides the remainder of the required information not previously addressed or included.

11.1. New or Increased Discharges. HAFB requires reduction in stormwater discharges for any new building projects; therefore, increased stormwater discharges are not anticipated. If an increased stormwater discharge or pollutant loading is identified, it will be subject to the Massachusetts (MA) anti-degradation regulations at 314 CMR 4.04. The provisions of 314 CMR 4.04 include information submittal requirements, and procedures to obtain authorization for increased discharges where appropriate. Any increased discharge authorized by the Massachusetts Department of Environmental Protection (MassDEP) will be incorporated into this plan.

https://www.gpo.gov/fdsys/granule/USCODE-2011-title33/USCODE-2011-title33-chap26-subchapI-sec1251/content-detail.html https://static.e-publishing.af.mil/production/1/af_a4/publication/afman32-1067/afman32-1067.pdf https://static.e-publishing.af.mil/production/1/af_a4/publication/afman32-1067/afman32-1067.pdf https://static.e-publishing.af.mil/production/1/af_a4/publication/afi32-1001/afi32-1001.pdf https://static.e-publishing.af.mil/production/1/af_a4/publication/afi32-1001/afi32-1001.pdf http://static.e-publishing.af.mil/production/1/af_a4/publication/afi32-7001/afi32-7001.