Attachment 11 - HAFB Operations and Maintenace Manual (DRAFT).pdf

APPENDIX I

DRAFT

OPERATIONS AND MAINTENANCE PROGRAM MANUAL

HANSCOM AIR FORCE BASE

Contract No. GS-10F-0103N

Prepared for:

Hanscom Air Force Base 66 ABG/CEIE Concord, Massachusetts

February 2020 iii

TABLE OF CONTENTS

1.0 INTRODUCTION

1.1 Purpose

1.2 Operations and Maintenance Program Components

1.3 Hanscom AFB Watershed

2.0 OPERATIONS AND MAINTENANCE OF PARKS AND OPEN SPACE

2.1 Pesticides, Herbicides, and Fertilizers

2.2 Lawn Maintenance and Landscape

2.3 Pet Waste Management

2.4 Management of Waterfowl

2.5 Trash Management

2.6 Erosion Control

2.7 Employee Training

3.0 OPERATIONS AND MAINTENANCE OF BUILDINGS AND FACILITIES

3.1 Dumpster and Waste Management

3.2 Central Heating Plant

3.3 Petroleum Products and Potential Stormwater Pollutants

3.4 Spill Prevention and Response

3.5 Employee Training

4.0 OPERATIONS AND MAINTENANCE OF VEHICLES AND EQUIPMENT

4.1 Vehicle and Equipment Operation and Maintenance Procedures

4.2 Employee Training

5.0 CATCH BASIN INSPECTION AND CLEANING

5.1 Catch Basin Inspection and Cleaning Procedures

5.2 Employee Training

5.3 Record Keeping

6.0 STREET AND PARKING LOT SWEEPING

6.1 Sweeping Procedures

6.2 Employee Training

6.3 Record Keeping

7.0 WINTER ROAD MAINTENANCE

7.1 Deicing Procedures

7.2 Snow Removal Procedures

7.3 Employee Training

7.4 Record Keeping

8.0 STRUCTURAL STORMWATER OPERATIONS AND MAINTENANCE

9.0 PROGRAM EVALUATION, RECORD KEEPING, AND REPORTING

9.1 Program Evaluation

9.2 Record Keeping

9.3 Reporting

Attachments

Attachment A Catch Basin Cleaning Documentation Attachment B Street Sweeping Documentation Attachment C Stormwater BMP SOPs Attachment D Stormwater BMP Inspection Log

ACRONYMS

66 ABG/CEIE Civil, Environmental and Infrastructure Engineering 66 ABG/CEOE CE Operations Engineering Section 66 ABG/CEOH CE Operations Heavy Repair Section 66 ABG/CEOI CE Operations Infrastructure Section AFB Air Force Base AAFES Army and Air Force Exchange Service AFCEC Air Force Civil Engineer Center

BMP Best Management Practices CE Civil Engineering HMOP Hazardous Materials Operation Plan IDDE Illicit Discharge Detection and Elimination ISWM Integrated Solid Waste Management L&GMP Landscape & Grounds Maintenance Plan LL Lincoln Laboratory MA Massachusetts MassDEP Massachusetts Department of Environmental Protection MCM Minimum Control Measure MIT Massachusetts Institute of Technology MS4 Municipal Separate Storm Sewer Systems MSW Municipal Solid Waste O&M Operations and Maintenance PMP Pest Management Plan S&ICP Snow & Ice Control Program SOP Standard Operating Procedure SPCC Spill Prevention Control and Countermeasures Plan SPRP Spill Prevention and Response Plan SWMP Stormwater Management Plan SWPPP Stormwater Pollution Prevention Plan TMDL Total Maximum Daily Load VCO Vehicle Control Officer

1.0 INTRODUCTION

The O&M Program was developed as an appendix to the Stormwater Management Plan (SWMP) to meet new stormwater infrastructure requirements for the General Permits for Stormwater Discharges from Small Municipal Separate Storm Sewer Systems (MS4) in Massachusetts (MA) (2016 MA MS4 General Permit).

1.1 Purpose

The purpose of the O&M Program is to develop and implement an operations and maintenance program for permittee-owned operations that has a goal of preventing or reducing pollutant runoff and protecting water quality from all permittee-owned operations. This is accomplished by implementing best management practices (BMPs) and measurable goals.

1.2 Operations and Maintenance Program Components

In accordance with Part 2.3.7 of the 2016 MA MS4 General Permit, the SWMP must include an O&M Program. The O&M Program addresses Minimum Control Measure (MCM) 6: Good Housekeeping and Pollution Prevention.

The O&M Program includes the following requirements:

Develop an inventory and written operation and maintenance procedures for all facilities within the following categories: parks and open spaces, buildings and facilities where pollutants are exposed to stormwater runoff, and vehicles and equipment.

Establish a written program detailing the activities and procedures for MS4 infrastructure maintenance in a timely manner to reduce the discharge of pollutants from the MS4.

Optimize routine inspections, cleaning and maintenance of catch basins.

Establish and implement procedures for sweeping and/or cleaning permittee-owned streets and parking lots.

Ensure proper storage of catch basin cleanings and street sweepings prior to disposal or reuse.

Establish and implement procedures for winter road maintenance.

Establish and implement inspection and maintenance frequencies and procedures for all stormwater treatment structures.

The inventory of permittee-owned facilities shall be updated annually. The status of the written procedures developed for permittee-owned facilities and activities will be evaluated as part of the Annual Report. All activities, inspections, maintenance, and training shall be documented for annual reporting.

1.3 Hanscom AFB Watershed

The Hanscom AFB stormwater system discharges into the Shawsheen River (designated Class B surface water used for drinking water). The Massachusetts Department of Environmental Protection (MassDEP) lists the Shawsheen River Headwater (Segment ID MA83-08) in the Massachusetts Year 2016 Integrated List of Waters as impaired due to bacteria/pathogens with an approved Total Maximum Daily Load (TMDL). Additionally, Hanscom AFB is located within Bedford municipality, which is listed under Part 2.2.2.b of the 2016 MA MS4 General Permit as containing waterbodies, or their tributaries, that are impaired due to phosphorus. Therefore, this O&M Program adheres to the requirements of 2016 MA Small MS4 General Permit Appendix F Part A.III with respect to reduction of bacteria/pathogen discharges, Appendix H Part II with respect to the control of phosphorous, and Appendix H Part III with respect to reduction of bacteria/pathogens, as applicable. Additional or enhanced BMPs that are required to be implemented in the O&M Program include:

Establish procedures to properly manage grass cuttings and leaf litter on permittee property, including prohibiting blowing organic waste materials onto adjacent impervious surfaces (See Section 2.0 for details).

Increased street sweeping frequency of all municipal owned streets and parking lots subject to Permit part 2.3.7.a.iii.(c) to a minimum of two times per year, once in the spring (following winter activities such as sanding) and at least once in the fall (Sept 1 – Dec 1; following leaf fall) (See Section 6.0 for details).

2.0 OPERATIONS AND MAINTENANCE OF PARKS AND OPEN SPACE

Description: Hanscom AFB has established procedures to address the proper use, storage, and disposal of pesticides, herbicides, and fertilizers, including minimizing the use of these products in accordance with manufacturer’s instructions; lawn maintenance and landscaping activities to ensure practices are protective of water quality; trash management; pet waste disposal; waterfowl management; and erosion and poor vegetative cover, as outlined in Section 2.3.7.a.ii.1 of the MS4 permit.

In addition, BMPs must be established to properly manage grass cuttings and leaf litter on permittee property, including prohibiting blowing organic waste materials onto adjacent impervious surfaces, as required by Appendix H Part II of the 2016 MA Small MS4 General Permit.

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. All parks and open spaces are classified within the Hanscom AFB L&GMP as improved, semi-improved, or unimproved grounds. This inventory must be reviewed annually and updated as necessary.

Measurable Goal(s) Inventory all parks and open spaces, update annually; 100% of parks and open space are maintained to ensure proper function.

Responsible Department(s): Civil Engineering (CE) Heavy Repair (66 ABG/CEOH) CE Infrastructure Section (66 ABG/CEOI) - Pest Management Only CE Operations Engineering (66 ABG/CEOE) – Trash Management Only

Reference Document(s): Hanscom AFB L&GMP Hanscom AFB Pest Management Plan (PMP)

Hanscom AFB implements the following procedures at all parks and open spaces to reduce the discharge of pollutants from the MS4.

2.1 Pesticides, Herbicides, and Fertilizers

CE Entomology Shop occasionally use pesticides and herbicides in routine operations. Care is taken to properly store, handle, and apply these chemicals in much the same manner as other hazardous materials, and only adequately trained staff is responsible for their use. The following BMPs are utilized by Hanscom AFB:

Non-chemical control efforts (i.e., mechanical, physical, cultural, and biological controls) will be utilized to the greatest extent possible to reduce chemical use.

Application shall be in accordance with manufacturer’s instruction.

Pesticide and herbicide application must be done by a certified applicator.

Pesticides are not applied outdoors when wind speeds exceed 5 miles per hour.

Personal protective equipment (i.e., respirators, dust masks, gloves, eye protection, etc.) is utilized during pesticide application.

Store materials in a secure location and keep containers clearly labeled.

All unusable pesticides are treated as hazardous waste.

Fertilizer application occurs on an as needed basis in the spring and autumn months. Soil pH is adjusted as needed by applying lime in the autumn months. Detailed procedures for fertilizer use and application are included in Section 3.1.4, Annex A of the L&GMP.

Pesticides are stored indoors at the CE Entomology Shop (Building 1823) and at the Patriot Golf Course pesticide storage facility; storage areas are inspected annually. Pesticides (including fertilizers containing pesticides) are logged in the Integrated Pest Management Information System when used. Pesticide usage reports are prepared on a monthly basis to evaluate and optimize application rates. Section 6 of the PMP includes procedures that have been developed to address the application, storage, and disposal of pesticides and herbicides.

2.2 Lawn Maintenance and Landscape

Lawn maintenance and landscaping activities are conducted in the spring, summer, and autumn seasons in accordance with the Hanscom AFB L&GMP. Section 1, Annex A of the L&GMP defines land at Hanscom AFB as improved, semi-improved, and unimproved grounds. Procedures developed for improved, semi-improved, and unimproved grounds are included in Section 3.1 through 3.3, Annex A of the L&GMP. General maintenance and landscaping procedures that are implemented across the installation are detailed in Section 3.4, Annex A of the L&GMP. The following BMPs are utilized by Hanscom AFB:

Lawn mowing occurs as defined in the L&GMP.

Mulching type blades are used on mowers and all grass clippings are incorporated back into the area mowed.

Accumulated grass clippings in Semi-Improved Grounds will be removed as resources permit and disposed of at compost area. Leaves are removed and taken to the compost area on an as-needed basis in the spring and autumn months to avoid entering the MS4.

Do not wash down or dispose of lawn clippings, leaves, tree trimmings, or other landscape waste in a storm drain, drainage ditch, or open body of water.

Blowing of organic waste materials onto adjacent impervious surfaces is prohibited.

Consider landscape design that utilizes native, drought tolerant vegetation.

All grounds will be policed on a daily basis to ensure that litter, debris, and any other unsightly material is removed.

Appendix 1, Annex A of the L&GMP visually outlines the locations of the defined grounds.

2.3 Pet Waste Management

Improper management of pet waste is believed to be a contributing cause of impairment to the Shawsheen River.

There is one established & fenced area for pets on base with disposal bins and proper signage. CE is only responsible for the mowing/trimming of this area and maintenance/repair to the fencing. The collection of accumulated pet waste is the responsibility of Hanscom Family Housing. There are no other disposal locations at any other parks or open spaces on base property. There are disposal locations throughout the leased housing area which is not part of the MS4 permitted area. Hanscom AFB’s MS4 Public Education and Outreach Program (Appendix E of the Stormwater Management Plan) incorporates educational messages and tips regarding proper disposal of pet waste.

2.4 Management of Waterfowl

Hanscom AFB is a migratory stop to flocks of Canadian Geese which is a protected species and is also considered a nuisance animal. Geese on the installation can disrupt traffic, leave droppings in significant amounts on sidewalks and improved grounds, and become aggressive if they perceive individuals as a threat. Their protected status means that they may not be removed, trapped, or otherwise dealt with beyond being scared away from a particular area without a permit. HAFB otaines the necessary permits for control measures.

Control devices identified in Section 7.2.1 of the PMP are utilized to address waterfowl and reduce droppings from entering the MS4. Control devices include: net gun, cannon/rocket net (launcher), nets, dip/hand, hand caught/gathered, whistler/screamer (pyrotechnic), and bird bombs (pyrotechnic).

2.5 Trash Management

Installation-wide procedures for managing trash are included in the L&GMP, Section 3.4 of Annex A. All grounds are policed to ensure that litter, debris and any other unsightly material is removed. Trash receptacles at playgrounds are emptied regularly.

2.6 Erosion Control

Installation-wide procedures for erosion control are included in Section 3.4, Annex A of the L&GMP. Practices including mulching and temporary seeding or sodding (i.e., hydroseeding) are utilized to address erosion or poor vegetation cover. Starter fertilizer may be incorporated into the hydro-seed mix.

2.7 Employee Training

Employees who perform maintenance or other applicable work at parks and open spaces are trained annually on proper use of equipment and application of pesticides, herbicides, and fertilizers. Training records are maintained by the individual’s supervisor.

3.0 OPERATIONS AND MAINTENANCE OF BUILDINGS AND FACILITIES

Description: Evaluate the use, storage, and disposal of petroleum products and other potential stormwater pollutants. Provide employee training as necessary, ensure that Spill Prevention Plans are in place. Develop management procedures for dumpsters and other waste management equipment. Sweep lots and areas surrounding the facilities to reduce runoff of pollutants.

An inventory of all buildings and facilities has been developed and is managed by Real Property (66 ABG/CEIA).

This inventory is reviewed and updated as necessary. With the exception of schools and Massachusetts Institute of Technology (MIT) Lincoln Laboratory (LL), all buildings and facilities located within the installation boundaries are owned and operated by Hanscom AFB. The Hanscom AFB Base-Wide Stormwater Pollution Prevention Plan (SWPPP) includes specific information on the facilities most likely to present a potential pollutant risk.

Measurable Goal(s) Inventory all buildings and facilities operated by Hanscom AFB, update as required by AF guidance; 100% of buildings and facilities are maintained to ensure proper function.

Responsible Department(s): CE Real Property (66 ABG/CEIA) (Inventory) CE Operations (66 ABG/CEO) (Maintenance)

Reference Document(s): Hanscom AFB Integrated Solid Waste Management (ISWM) Plan Hanscom AFB Spill Prevention and Response Plan (SPRP) Hanscom AFB Hazardous Materials Operations Plan (HMOP) Hanscom AFB Base-Wide SWPPP

Hanscom AFB implements the procedures outlined below for permittee owned or operated buildings and facilities to reduce the discharge of pollutants from the MS4.

3.1 Dumpster and Waste Management

All liquid and solid waste must be disposed of properly. The Hanscom AFB ISWM Plan contains procedures for the management of various waste streams generated at Hanscom AFB. Municipal solid waste (MSW) generated at Hanscom AFB is collected in dumpsters located around the installation. A recycling dumpster is co-located with trash dumpsters at or near each building. See Appendix E of the ISWM Plan for dumpster locations.

MSW is collected from dumpsters by the MSW contractor. The MSW contractor transports MSW to the appropriate off-base landfill. Recyclables collected by the MSW contractor are loaded into roll-off dumpsters located outside of the Solid Waste Transfer Facility (Building 1855) and are properly recycled at the appropriate recycling facility according to the type of material.

BMPs include:

Provide only covered containers, rather than those with completely open tops, to reduce the amount of rainwater entering the container and the potential for leaking during normal use.

Keep lids on dumpsters and containers closed at all times unless adding or removing material.

Routinely inspect dumpsters and lids for deterioration or damage that may cause exposure to stormwater or allow leakage.

Routinely inspect solid and liquid waste storage areas to check for leaks and spills.

Regularly pick up surrounding trash and debris and regularly sweep the area.

Never place hazardous materials, liquids, or liquid-containing wastes in a dumpster or recycling or trash container.

Do not allow any vehicles, equipment, or material to park or be placed in front of dumpsters in such a manner that prevents dumpster pickup.

Provide staff training in accordance with the base Spill Prevention and Response Plan.

3.2 Central Heating Plant

Hanscom AFB owns and operates a natural gas and #6 fuel oil powered heating plant (Building 1201) located on the southeast side of the Base. A fuel tank yard is located adjacent to the heating plant. The tank yard contains two 235,000-gallon tanks of #6 fuel oil within a bermed area. A 100-gallon diesel generator AST is with the generator directly adjacent to the building. . Hanscom AFB has in place a SPRP and utilizes the following BMPs to manage potential stormwater pollutant releases in this area:

Appropriate tank inspections are contracted and performed by qualified service providers.

Stormwater release valves are present in the diked area and locked. The valves may only be opened after an employee of the base environmental office inspects the contents of the diked area and deems that no contamination is present.

3.3 Petroleum Products and Potential Stormwater Pollutants

For storage and handling procedures of petroleum products and potential pollutants, refer to the Hanscom AFB SPRP and HMOP.

Handling, Loading, and Unloading

Hanscom AFB utilizes the following BMPs related to handling, loading, and uploading of petroleum and liquid materials:

Petroleum and/ or chemical storage, loading, and unloading areas should be covered or enclosed to reduce potential contact with stormwater.

Inspect containers for material compatibility and structural integrity prior to loading/unloading any raw or waste materials.

Use dry cleanup methods (e.g., squeegee and dust pan, sweeping, and absorbents) rather than hosing down surfaces.

Material Storage

Hanscom AFB utilizes both indoor and outdoor storage areas throughout the installation. Petroleum, chemical, and other liquid materials with the potential to pollute stormwater must be stored and handled in accordance with procedures to prevent and/or minimize potential contamination of the MS4 or associated waterways. Hanscom AFB utilizes the following BMPs related to material storage:

Confine material storage indoors whenever possible.

Make sure all outdoor storage containers have lids that are kept closed to prevent stormwater contamination.

Avoid placing outdoor materials near storm drains.

Floor drains in storage areas should be disconnected from the stormwater system.

Store materials away from high traffic areas and on structures that keep them from coming into contact with the floor.

Label containers that could be susceptible to spillage or leakage to encourage proper handling and facilitate rapid response if a spill occurs.

Provide secondary containment for storage tanks and drums.

Provide sufficient aisle space to allow for routine inspections and access for spill cleanup.

Inspect storage areas for spills or leaks and containment units for corrosion or other failures.

Disposal Procedures

Chemical and petroleum waste must be stored in separate, enclosed drums or tanks and clearly labeled appropriately.. Each container should remain closed unless in use and should remain in a covered, secured area.

Hanscom AFB utilizes the following BMPs related to disposal procedures:

Containers used to store waste material must be kept closed at all times, except for when waste is actively being added to or removed from the container.

Recycle leftover materials whenever possible.

Substitute nonhazardous or less-hazardous materials for hazardous materials whenever possible.

Protect empty containers from exposure to stormwater and dispose of them regularly to avoid contamination from container residues

3.4 Spill Prevention and Response

Any building/facility or departments that maintain, ship and receive, or handle hazardous materials or chemicals are required to have proper spill response procedures and plans in place. Spill prevention and response procedures are included in the Hanscom AFB SPRP.

Procedures used to minimize the potential for leaks, spills and other releases include:

Procedures for material storage and handling, including the use of secondary containment and barriers between material storage and traffic areas, have been implemented to prevent the discharge of pollutants from these areas.

All applicable staff are trained on procedures to quickly stop, contain and clean up leaks, spills, and other releases.

Spill kits are kept on-site, located near areas where spills may occur.

Appropriate facility personnel are notified when a leak, spill or other release occurs.

Regular integrity testing and visual inspection of the ASTs, oil-filled transformers, and associated systems are conducted in accordance with the Hanscom AFB SPRP.

All Hanscom AFB personnel are required to report any pollution incident (including oil or chemical spills) to the Hanscom AFB Fire Department immediately..

MASSACHUSETTS INSTITUTE OF TECHNOLOGY LINCOLN LABORATORY

MIT LL has a support agreement with Hanscom AFB and manages above ground storage tanks associated with their program activities within the confines of Hanscom AFB. Spill prevention and response procedures associated with these tanks are covered by the Spill Prevention Control and Countermeasures (SPCC) Plan for MIT LL.

Because the countermeasures and spill response procedures for these tanks are different than for the tanks owned by Hanscom AFB, personnel should refer to the MIT LL SPCC Plan for specific instructions. MIT LL reports all pollution incidents (including oil or chemical spills) to the Hanscom AFB Fire Department.

3.5 Employee Training

Employees who perform work related activities that involve the use of oils, chemicals, and hazardous materials are trained in accordance with the SPRP. Training records are maintained by the individual’s supervisor.

Additionally, all new employees involved in facility maintenance (i.e. CE employees) are trained on stormwater pollution prevention, IDDE procedures, and spill response procedures, upon hire at the CE newcomers briefing.

4.0 OPERATIONS AND MAINTENANCE OF VEHICLES AND EQUIPMENT

Description: Establish procedures for the storage of permittee owned and operated vehicles. Vehicles with fluid leaks shall be stored indoors and containment shall be provided. Evaluate fueling areas owned by the permittee or used by permittee vehicles. Procedures have been established to ensure that vehicle wash waters are not discharged to municipal storm drains or surface waters.

An inventory of Hanscom AFB maintenance vehicles has been developed and is maintained by the 66 ABG/CE Vehicle Control Officer (VCO). The inventory is reviewed annually and updated as necessary. Vehicle information including recalls, maintenance, mileage, and other records are maintained by the VCO.

Measurable Goal(s) Inventory all vehicles and equipment, update annually. Implement the BMPs on 100% of vehicles and activities.

Responsible Department(s): 66 ABG/CEOH

66ABG/CEOE

VCO

Reference Document(s): Hanscom AFB SPRP 66 ABG/CE Vehicle Inventory List

Hanscom AFB implements the procedures outlined below for permittee owned vehicles to reduce the discharge of pollutants from the MS4.

4.1 Vehicle and Equipment Operation and Maintenance Procedures

Common procedures related to vehicle operation and maintenance that take place at specific locations around the installation may be potential sources of storm water contamination. Hanscom AFB implements the following BMPs for permittee-owned and operated vehicles and equipment to reduce the discharge of pollutants from the MS4.

Vehicle Parking and Storage

Hanscom AFB owned vehicles are stored in multiple locations across the Base and include pickup trucks, maintenance trucks, dump trucks, snowplows, utility vans, various lawn maintenance equipment, and tractors. The majority of ground and snow/ice maintenance vehicles are stored on a paved lot adjacent to Building 1827 (Heavy Repair). Vehicles awaiting maintenance are stored on a paved lot adjacent to Building 1642 (Vehicle Maintenance).

Hanscom AFB utilizes the following BMPs in regard to vehicle storage.

Store and park vehicles on impervious surfaces and/or under cover or indoors whenever possible.

Vehicles with fluid leaks shall be stored inside and under cover, or containment shall be provided until repaired.

Regularly inspect vehicle storage areas and equipment for leaks and use drip pans as needed until repairs can be performed.

Ensure that the parking areas are free of sediment and debris. Street sweep or clean as required.

Spill kits are kept on-site, near locations where spills may occur.

Vehicle and Equipment Maintenance

Buildings are used to provide maintenance personnel with heated, covered areas in which to complete minor maintenance, oil changes and preparation of vehicles, equipment and tools for use at locations around the installation. Vehicle maintenance is primarily performed in Building 1642; a No Exposure Certification is present for this building. A vehicle maintenance hobby shop, Building 1608, is available for Hanscom AFB personnel to perform auto work on personal vehicles. 66 FSS employees also provide maintenance services for personal vehicles within Building 1608. No outdoor vehicle maintenance may take place on Hanscom AFB. Hanscom AFB implements the following BMPs related to vehicle and equipment maintenance:

Vehicle and equipment maintenance are performed indoors.

Conduct routine inspections of heavy equipment and vehicles to proactively identify maintenance needs or potential leaks.

Perform routine preventive maintenance to ensure heavy equipment and vehicles are operating optimally.

Equipment will be kept clean so that a buildup of grease and oil will not wash away when the equipment is exposed to rain.

Recycle or dispose of waste properly and promptly.

Sweep and pick up trash and debris as needed.

Do not dump any liquids or other materials outside, especially near or in storm drains or ditches.

Vehicle and Equipment Washing

Vehicle and equipment washing occurs in designated wash areas. Hanscom AFB vehicles are washed at Building 1642 and equipment may be washed at Building 1827. A public car wash facility is also owned and operated by Hanscom AFB. Biodegradable, environmentally friendly detergents are used. All three wash facilities are equipped with trench drains to capture wash water and pipe to an oil/water separator before being discharged to the sanitary sewer. The oil/water separators are periodically cleaned and pumped out by a service contractor. All oil/water waste generated is properly managed and disposed of by the contractor. Hanscom AFB follows the BMPs below:

Vehicles and equipment should be washed inside whenever possible to reduce runoff to the stormwater system.

Discharge of any wash water shall not be discharged to the storm drainage system or surface water (e.g., stream, pond, or drainage swale).

Periodic sweeping and/or cleaning should be completed to prevent accumulation from forming on the washing area.

Absorbent pads and drip pans are maintained to capture and collect spills or noticeable leaks observed during washing activities.

Oil/water separators are maintained regularly to prevent discharge and ensure proper operation.

Fueling Operations

Fueling operations occur in designated areas. A public gas station is present within the Hanscom AFB boundaries.

Hanscom AFB owns the USTs at this facility, but all valves, pumps, and aboveground equipment is owned and operated by the Army and Air Force Exchange Service (AAFES). Additionally, four fueling pumps are present adjacent to Building 1642 for Hanscom AFB vehicles. The AERO Club facility also has a fuel UST and dispenser for fueling small aircraft; however, this location is managed by a NPDES permit and facility specific SWPPP. In general, Hanscom AFB follows the fueling operations BMPs listed below:

Fueling operations should be conducted on an impervious or contained pad or under cover.

Avoid “topping off” or filling beyond the normal fill capacity.

Drip pans will be used where leaks or spills of fuel can occur.

Spill kit will be kept on-site in close proximity to potential spill areas.

Any spills will be cleaned-up immediately using dry clean-up methods.

Stormwater runoff will be diverted around fueling areas using diversion dikes and curbing.

Perform routine inspections of fueling areas, structures, and equipment for proper function and condition as well as any signs of corrosion or potential failure to ensure that pollutants (e.g., gasoline or oil) do not enter the MS4.

4.2 Employee Training

Employees who perform maintenance or other applicable work related to vehicles and equipment are trained annually on their work procedures and the proper operation of related equipment. Such records are maintained by the individual’s supervisors.

5.0 CATCH BASIN INSPECTION AND CLEANING

Description: Optimize routine inspections, cleaning, and maintenance of catch basins with the goal of frequently cleaning catch basins to ensure no catch basin will exceed 50 percent full. Shallow catch basis without a sump area are not included in this metric as they serve primarily as stormwater infrastructure connections and not pollution control devices.

According to the Permit, an excessive sediment or debris loading is a catch basin sump more than 50 percent full.

A catch basin sump is more than 50 percent full if the contents within the sump exceed one half the distance between the bottom interior of the catch basin to the invert of the deepest outlet of the catch basin.

Catch basin cleanings (i.e., solid materials such as leaves, sand and twigs removed from stormwater collection systems during cleaning operations) must be handled in accordance with current MassDEP policies:

https://www.mass.gov/files/documents/2018/03/09/catch-basins.pdf

Measurable Goal(s) Clean catch basins on established schedule such that no catch basin sump is more than 50 percent full.

Responsible Department(s): 66 ABG/CEOE 66 ABG/CEIE (Record Keeping)

Reference Document(s): GeoBase: Catch Basin Inventory Catch Basin Cleaning SOP Catch Basin Cleaning Inspection Form Catch Basin Cleaning Log

Catch basins help minimize flooding and protect water quality by removing trash, sediment, decaying debris, and other solids from stormwater runoff. These materials are retained in a sump below the invert of the outlet pipe (older catch basins may not have a sump). Catch basin cleaning reduces foul odors, prevents clogs in the storm drain system, and reduces the loading of trash, suspended solids, nutrients, bacteria, and other pollutants to receiving waters.

Hanscom AFB contracts services to perform routine inspections, cleaning, and maintenance of the approximately 660 catch basins that are located within the MS4 regulated area. The location of all catch basins on Hanscom AFB is maintained and updated in GeoBase. Hanscom AFB will implement the following procedures to manage catch basins within the MS4.

5.1 Catch Basin Inspection and Cleaning Procedures

Inspection and Cleaning Frequency

Routine inspections and cleanings of catch basins occurs on an annual basis. The schedule of catch basin inspections and cleanings will be adjusted, as needed, to best prevent any catch basin sump from being more than 50 percent full.

Inspection and maintenance for catch basins located near construction activities (roadway construction, residential, commercial, or industrial development or redevelopment) will be prioritized. Catch basins in such areas will be inspected and cleaned more frequently if inspection and maintenance activities indicate excessive sediment or debris loadings.

Contractors measure the catch basin sediment buildup depth to determine if the catch basin sump is more than 50% full.

If a catch basin sump is more than 50 percent full during two consecutive routine inspections or cleaning events, the finding will be documented, the contributing drainage area will be investigated for sources of excessive sediment loading (i.e., smaller sump, nearby construction, surrounding land uses, location, etc.), and to the extent practicable, contributing sources will be addressed. If no contributing sources are found, the inspection and cleaning frequency will increase. Any actions taken will be described in the Annual Report.

Records from consecutive inspections/cleanings will be compared and used to identify catch basins that may need to be cleaned more or less frequently than once per year.

Inspection and Cleaning Procedures

Catch basin inspection and cleaning procedures address both the condition of the physical basin structure, frame and grate, as well as the quality of stormwater conveyed by the structure. Procedures are included in the Catch Basin SOP, included in Attachment A.

All observations regarding the condition of the catch basin structure and water quality will be documented on the Catch Basin Inspection Form (Attachment A).

At the end of each day, the number of catch basins inspected and/or cleaned, and the volume or mass of material removed will be documented on the Catch Basin Inspection and Cleaning Log (Attachment A).

Disposal of Catch Basin Cleanings

Procedures for the management and disposal of catch basin cleanings are included in the Catch Basin SOP (Attachment A).

MassDEP does not require testing of catch basin cleanings unless contamination is suspect. However, Hanscom AFB proactively collects one composite sample from the catch basin cleaning disposal dumpster for testing to ensure no contamination is present. If no contamination is found the catch basin cleaning debris is disposed of as MSW at an approved landfill or as landfill cover. Prior to disposal, catch basin cleanings are stockpiled in a designated roll off dumpster located in the CE Pole Barn storage yard.

5.2 Employee Training

Hanscom AFB contracts catch basin cleaning activities to qualified service providers. The contractor shall be given a copy of this and any applicable SOPs to ensure compliance with MS4 regulations. They shall complete all catch basin inspections, cleanings, and document findings in accordance with the Catch Basin SOP, Catch Basin Inspection Form and Catch Basin Inspection and Cleaning Log, provided in Attachment A.

5.3 Record Keeping

All activities related to catch basin cleaning must be documented. The following information should be documented and included in each Annual Report:

Any action taken in response to excessive sediment or debris loading.

Total number of catch basins.

Number of catch basins inspected.

Number of catch basins cleaned.

Total volume or mass of material removed from catch basins.

6.0 STREET AND PARKING LOT SWEEPING

Description: Establish and implement procedures for sweeping and/or cleaning streets and permittee-owned parking lots to prevent pollution from entering the stormwater system. This includes frequency of sweeping, proper storage and disposal procedures such that street sweepings do not discharge to receiving waters.

Street Sweepings are classified as “solid waste” subject to the Massachusetts solid waste regulations. Storage, reuse and/or disposal of street sweepings will be managed in accordance with current MassDEP policies and regulations:

http://www.mass.gov/eea/docs/dep/recycle/laws/stsweep.pdf.

Measurable Goal(s) Sweep all streets and permittee-owned parking lots in accordance with permit conditions.

Responsible Department(s): 66 ABG/CEOH

Reference Document(s): Hanscom AFB Landscape & Grounds Maintenance Plan (L&GMP) Hanscom AFB Integrated Solid Waste Management Plan (ISWMP) Street Sweeping Cleaning Log Street Sweeping Compost Application Log

Street sweepings are materials such as sand, salt, leaves, broken glass, small pieces of metal, and other litter and debris removed from streets, parking lots and sidewalks in order to prevent these materials from being washed into storm sewers and surface waters, and to improve the appearance and safety of public roadways.

Hanscom AFB’s street sweeping program covers all streets, sidewalks, and parking lots located within the Base.

All paved areas will be cleaned throughout the year to reduce watershed pollution. Street sweeping operations are included in Section 3.5, Annex A of the L&GMP and are summarized below.

6.1 Sweeping Procedures

Sweeping Frequency

Routine sweeping and cleaning of all paved areas occurs on an annual basis, at a minimum. Increased sweeping frequency of target areas are determined based on pollutant load reduction potential, based on inspections, pollutant loads, catch basin cleaning or inspection results, land use, water quality limited or TMDL waters, or other relevant factors.

Spring sweeping of all paved areas will occur after the last anticipated winter event resulting in sanding and/or salting. Sweeping will primarily focus on the removal of salt and sand residue from snow clearing operations before it is washed into the storm drainage system. Sweeping should occur as soon as possible after snow melt and following winter activities.

Street sweeping will begin in the early spring and will continue through summer months to the end of autumn in accordance with the L&GMP. The primary focus is to ensure that roads and parking lots remain free of accumulated dirt and debris. This sweeping satisfies the two sweeping events per year for the phosphorous impaired water requirement.

Sweeping Procedures

Street sweeping should be conducted in dry weather. Sweeping should not be conducted during or immediately after rain storms.

Sweep in a manner that avoids depositing debris into storm drains and catch basins.

Routinely inspect and perform maintenance on sweeping equipment to reduce the potential for leaks.

Maintain documentation of the streets/parking lots swept, the number of miles swept, and the volume and/or mass of materials removed each day in the Street Sweeping Log (Attachment B).

Management and Disposal of Sweepings

Street sweeping debris is delivered to the Hanscom AFB composting facility for reuse.

Temporary storage of sweeping debris prior to disposal/reuse is on an impervious surface or in a closed dumpster that is protected from runoff. Temporary storage must be at the location where the sweepings are generated.

Solid waste material that has been inadvertently collected during sweeping activities are manually separated and removed. All trash, other debris, and nonorganic material removed from sweepings are disposed of as solid waste through a licensed landfill.

Compost containing street sweepings must adhere to the following restrictions and conditions:

o The compost is used only along public ways and parking lot areas; compost may not be used in residential areas;

o The compost is kept above the level of the groundwater;

o The compost is not used within the 100-foot buffer zone of a wetland or within wetland resource areas including bordering vegetative wetlands and riverfront areas; and o The compost is not used within 500 feet of a ground or surface drinking water supply as there are no such drinking water sources on HAFB.

Detailed procedures for the management of street sweepings are included in Section 7.4 of the ISWMP.

6.2 Employee Training

Maintenance employees responsible for street and parking lot sweeping are trained annually on the procedures and proper operation of equipment. Training records are maintained by the individual’s supervisor.

6.3 Record Keeping

All activities related to street sweeping must be documented. The following information will be included in each annual report:

Number of miles cleaned or the volume/mass of material removed.

For street sweepings utilized as an additive to compost, MassDEP requires records of the source of the sweepings, the location of use, and the quantity of sweepings used. Records must be maintained for a period of three years.

Maintain documentation of the source of street sweeping, location of compost applied, and volume/mass of street sweeping component applied within the Street Sweeping Compost Application Log (Attachment B).

7.0 WINTER ROAD MAINTENANCE

Description: Establish and implement procedures for winter road maintenance including the use and storage of salt and sand; minimize the use of sodium chloride and other salts, and evaluate opportunities for use of alternative materials; and ensure that snow disposal activities do not result in disposal of snow into waters of the United States.

For purposes of this MS4 Permit, salt shall mean any chloride-containing material used to treat paved surfaces for deicing, including sodium chloride, calcium chloride, magnesium chloride, and brine solutions.

Measurable Goal(s) Implement salt use optimization during winter maintenance operation.

Evaluate at least one salt/chloride alternative for use at Hanscom AFB.

Responsible Department(s): 66 ABG/CEOH

Reference Document(s): Hanscom AFB Snow and Ice Control Program (S&ICP)

Winter road maintenance incudes snow removal and the use of salt, sand, or deicers to ensure safe winter driving conditions. Proper maintenance procedures and use and storage of materials can help reduce the discharge of pollutants, such as sand and salt, from the MS4 and to receiving waters. Hanscom AFB will implement the winter maintenance procedures described below to reduce the discharge of pollutants from the MS4.

7.1 Deicing Procedures

The major materials used in snow and ice control are coarse sand and salt anti-icing agents. These materials are stockpiled in advance of an event and are immediately available when needed. Salt is stored in Storage Silo 1847.

Hanscom AFB uses approximately 75% sand and 25% NaCl in road treatment. Liquid salt brine may be utilized as a pre-wetting technique and may be applied up to 72-hours prior to a snow event. Manual control spreaders are used for application.

Application of Deicing Materials

Minimize the use and optimize the application of sodium chloride and other salt (while maintaining public safety) and consider opportunities for use of alternative materials.

Optimize sand and/or chemical application rates through the use, where practicable, of automated application equipment (e.g., zero velocity spreaders), anti-icing and pre-wetting techniques, and alternate chemicals.

Use the lowest amount of product that will be effective.

When feasible, use higher percentage of sand in sand/salt mixture.

Track the amount of material used and maintain records of the application of sand, anti-icing and/or de-icing chemicals to document the reduction of chemicals to meet established goals.

Hanscom AFB reviews records of the application and quantity of each deicing material applied to evaluate any reduction of chemical use in order to meet established goals. As discussed in Section 3.3.4 of the S&ICP, the overall environmental impacts of snow removal operations and deicing agents on the storm water system are evaluated and discussed during the annual post-season meeting. Any recommended effective, environmental-friendly alternatives based on the findings are also discussed during post-season meetings.

Storage of Deicing Materials

Store materials under covered or enclosed areas and on impervious surfaces. Store piles in such a manner as not to impact surface water resources, groundwater resources, and recharge areas.

Routinely inspect storage areas for migrating materials or deterioration of containment structures. Clean up all migrating materials upon discovery and repair the source of the migrating pollutant to prevent potential contamination of stormwater.

Frequently sweep near the storage/loading areas to reduce the amount of salt, sand, or other materials that is tracked out.

Do not store road salt near surface water resources, groundwater resources, or recharge areas.

All deicing materials are properly stored under cover to ensure they are not exposed to precipitation or otherwise carried to a catch basin, resource area or waterbodies. Storage Silo 1847 is utilized for salt storage. During the winter, sand/salt mixture for use at facility walkways is stored in sand barrels located throughout the base, as shown in Appendix 3, Annex A of the S&ICP.

Equipment and Maintenance

When possible, snow removal equipment will be kept inside heated areas.

Calibrate equipment to reduce and optimize salt use and ensure deicing agents are being used efficiently.

Do not overfill trucks with deicing materials as it may lead to spills.

Encourage the use of automated application equipment like zero velocity spreaders.

Perform daily equipment inspections prior to use.

At the end of the season, all snow removal equipment will be steam cleaned and all accumulated material will be removed before storing snow removal equipment for the post-season. An inventory of snow and ice control equipment used for snow removal is included in Annex C to Appendix B of the S&ICP.

7.2 Snow Removal Procedures

Keeping the roads safe during snow events is the number one priority during all plowing operations. Priorities for snow clearing are listed in Section 3.2.1. – 3.2.4, Annex A of the S&ICP and reflect the order in which areas will be cleared of snow and ice. As soon as the snow event ends, snow removal operations begin according to the procedures defined in Section 3.2.7, Annex C to Appendix B of the S&ICP.

In addition, a master copy of the base snow removal map is maintained in the Heavy Repair Division at Building 1827.

Snow Storage and Disposal

Snow should not be pushed or dumped into waterbodies or wetlands, into stormwater drainage swales or ditches, or on top of catch basins.

Snow should not be stored near waterbodies or wetlands.

Avoid storing snow in areas that are unstable, areas of potential erosion, or high points where snow may melt and collect debris as runoff before it enters the stormwater system.

Clear debris from the site and prior to using the site for snow disposal.

Incorporate practices such as snow fencing to contain snow piles and reduce snow drifting.

The MS4 Permit prohibits snow disposal into waters of the United States. Snow disposal activities, including selection of appropriate snow disposal sites, shall adhere to the MassDEP Snow Disposal Guidance, Guideline No. BWR G2015-01 (Effective Date: December 21, 2015) (http://www.mass.gov/eea/agencies/massdep/water/regulations/snow-disposal-guidance.html)

Hanscom AFB often transports snow to various stockpile storage areas around the base that are maintained according to procedures outlined in Section 3.2.8, Annex C to Appendix B of the S&ICP. The locations of the stockpile areas are identified in Appendix 1, Annex B of the S&ICP. To the greatest extent possible, stockpiles are located away from waterbodies. In addition, approximately 1,200 feet of snow fencing is constructed as described in Section 3.1.6, Annex C to Appendix B of the S&ICP.

7.3 Employee Training

Maintenance employees responsible for winter road maintenance are routinely trained on the procedures and proper operation of equipment. Training records are maintained by the individual’s supervisor.

7.4 Record Keeping

All activities related to winter road maintenance must be documented. The following information will be included in the Annual Report:

Miles of roads plowed annually, Quantity of salt and other materials used, Type of equipment used.

This information is recorded and stored by the 66 ABG/CEOH.

8.0 STRUCTURAL STORMWATER OPERATIONS AND MAINTENANCE

Description: Establish and implement inspection and maintenance frequencies and procedures for all stormwater treatment structures such as water quality swales, retention/detention basins, infiltration structures, proprietary treatment devices, or other similar structures. All permittee-owned stormwater treatment structures (excluding catch basins) shall be inspected annually at a minimum.

Measurable Goal(s) Inspect and maintain 100% of treatment structures to ensure proper function.

Responsible Department(s): 66 ABG/CEOH

Reference Document(s): Hanscom AFB Landscape & Grounds Maintenance Plan (L&GMP) Stormwater BMPs Inspection SOPs Stormwater BMP Inspection Checklist

The following procedures have been established to provide guidance on inspection and maintenance frequencies and procedures for all structural stormwater treatment controls, such as water quality swales, retention/detention basins, infiltration structures, proprietary treatment devices or other similar structures.

Structural stormwater BMPs will be inspected annually at a minimum. Detailed procedures for the inspection and maintenance of the following structural stormwater treatment BMPs is included in Attachment C. A stormwater BMP inspection log is included in Attachment D.

Structural stormwater treatment structures at Hanscom AFB include:

Raised Catch Basin (See Section 5.0 for O&M procedures) Bioretention/Treatment Pond/Rain Gardens Constructed Wetland/Vegetated Wetland Extended Dry Detention Basin/Gravel Wetland Infiltration…