Simsbury_TS_SWPPP_2022 .pdf

TOWN OF SIMSBURY

STORMWATER POLLUTION PREVENTION PLAN (SWPPP)

66 Wolcott Road, Simsbury, CT

PREPARED FOR:

Town of Simsbury Recyclables Bulky Waste Transfer Station 66 Wolcott Road Simsbury, CT

PREPARED BY:

Atlas Technical Consultants LLC 290 Roberts Street-Suite 301 East Hartford, CT 06108 July 5, 2023

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290 Roberts Street-Suite 301 East Hartford, CT 06108

(860) 282-9924 | oneatlas.com

June 26, 2023

Mr. Thomas Roy

66 Town Forest Road Simsbury, CT

Subject: Stormwater Pollution Prevention Plan (SWPPP) 66 Wolcott Road, Simsbury, CT

Dear Mr. Thomas Roy, Atlas is pleased to present this Stormwater Pollution Prevention Plan for the Recyclables Bulky

Waste Transfer Station.

If you have any questions, please call us at (860) 282-9924.

Respectfully submitted, Atlas Technical Consultants, LLC

Luke Whitehouse Kay Lehoux Environmental Division Manager Environmental Compliance Manager

Distribution: troy@simsbury-ct.gov

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CONTENTS

EMERGENCY CONTACT AND NOTIFICATION LIST

1. INTRODUCTION

2. FACILITY INFORMATION

2.1 Facility Information

2.2 Facility Description

2.3 Structures and Operations Potentially Exposed to Stormwater

2.3.1 Vehicle Equipment Maintenance/Washing

2.3.2 Fuel Dispensing Area

2.3.3 Outside Storage

2.3.4 On-site Waste Disposal

2.3.5 Salt Storage Piles or Piles Containing Salt

2.3.6 Roof Drains and Vents

2.3.7 ASTs

2.3.8 Groundwater

2.3.9 Dust Generation and Vehicle Tracking of Industrial Materials

2.3.10 Other Potential Pollutant Sources

2.4 Spill History

3. STORMWATER POLLUTION PREVENTION TEAM

3.1 Team Members and Individual Responsibilities

3.2 Team Responsibilities

4. STORMWATER MANAGEMENT

4.1 Control Measures

4.1.1 Good Housekeeping

4.1.2 Vehicle or Equipment Washing

4.1.3 Floor Drains

4.1.4 Roof Areas

4.1.5 Minimize Exposure

4.1.6 Sediment and Erosion Control

4.1.7 Management of Runoff

4.1.8 Preventative Maintenance

4.1.9 Spill Prevention and Response

4.1.10 Salt Storage

4.1.11 Future Construction

4.1.12 Non-Stormwater Discharges

4.2 Stormwater Monitoring Program

4.2.1 Schedules and Test Parameters

Sector Specific Monitoring Requirements Impaired Waters Monitoring Requirements

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4.2.2 Sample Collection

4.2.3 Recordkeeping and Reporting Requirements

5. TRAINING, INSPECTIONS, AND RECORDKEEPING

5.1 Training

5.2 Inspections

5.2.1 Routine Inspections

5.2.2 Stormwater Visual Inspections

5.2.3 Stormwater Comprehensive Site Compliance Evaluations

5.3 Recordkeeping

6. PLAN REVIEW AND AMENDMENT

7. IMPLEMENT ITEMS

Facility Management Approval

Connecticut P.E. Certification

Non-Stormwater Discharge Certification

Routine Facility Inspections

TABLES

Table 1 – Emergency Contact and Notification List

Table 2 – Structures and Operations Potentially Exposed to Stormwater

Table 3 – Control Measures

Table 4 – Stormwater Sampling Parameters and Limits

Table 5 – Implementation Items

FIGURES

Figure 1 Site Locus

Figure 2 Site Plan

APPENDICES

Appendix A Certifications

Appendix B Inspection Logs and Forms

Appendix C Training and Plan Revision Logs

Appendix D Spill Documentation and Notification Form

Appendix E Stormwater Sampling Forms and Results

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EMERGENCY CONTACT AND NOTIFICATION LIST

Table 1 – Emergency Contact and Notification List

Spill Management Team

Name Title Office Cell

Thomas Roy Director of Public Works 860-658-3222 860-982-3724

Kevin Clemens Highway Superintendent 860-658-3222

Federal, State, and Local Agencies

Town of Simsbury Fire Department Local Fire Department/Fire Marshal Patrick T. Tourville

911 860-658-1971

Town of Simsbury Police Department Local Police Department/Chief Nicholas Boulter

911 860-658-3101

Connecticut Department of Energy and Environmental Protection (CTDEEP)

CTDEEP 866-337-7745 (24 hr.) --

National Spill Response Center Spill Reporting 800-424-8802 (24 hr.) --

US EPA (Region 1) New England EPA Resource 617-223-7265 (24 hr.) --

Spill Response Contractors and Other Services

Environmental Services Inc. (ESI) Spill Cleanup 800-486-SPIL (7745)

University of CT Health Center (Farmington)

Human Health Hazards 860-298-8442 --

Atlas Technical Consultants, LLC (Atlas)

Consultant 860-282-9924 --

Kay Lehoux (Atlas) Environmental Compliance Manager

860-466-6002 860-933-9657

1. INTRODUCTION

This Stormwater Pollution Prevention Plan (SWPPP) has been prepared for the Town of Simsbury’s Recyclables Bulky Waste Transfer Station (the “Facility”) located at 66 Wolcott? Road in Simsbury, Connecticut (the “Site”). This SWPPP has been prepared in accordance with the Connecticut Department of Energy and Environmental Protection (CTDEEP) General Permit for the Discharge of Stormwater Associated with Industrial Activity (Stormwater General Permit), effective October 1, 2019, which requires a SWPPP.

The Stormwater General Permit is applicable if a facility meets both of the following qualifications:

1) The facility meets the definition of “industrial activity”. Under the Stormwater General Permit, “industrial activity” includes numerous Standard Industrial Classification (SIC) codes and descriptive categories ☒YES ☐NO

Facility SIC code (Section 5(c)(2)(A)): 4953

Sector of Industrial Activity: Sector C-Refuse Systems

2) The facility discharges stormwater that may come into contact with an “industrial activity”. Any stormwater associated with an “industrial activity” on site is included.

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☒YES ☒NO

As the Facility is a covered “industrial activity” and it conducts industrial activities of which are exposed to stormwater, it is required to register under the Stormwater General Permit and prepare a SWPPP.

This SWPPP describes the procedures, methods and equipment used to prevent the contamination of stormwater. This SWPPP is intended to meet the planning requirements of the Stormwater General Permit and, as such, a copy of this SWPPP will be kept on Site at all times.

Industrial activities at the Facility includes vehicle/equipment storage, bulky waste drop-off and storage, sand and salt storage, universal waste storage, waste oil storage, white goods storage, and brush and leaf storage.

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2. FACILITY INFORMATION

2.1 Facility Information

Name: Town of Simsbury Recyclables Bulky Waste Transfer Station

Address: 66 Wolcott Road Simsbury, CT

Phone No.: 860-658-3222

Facility Operations: Municipal Transfer Station

Owner: Town of Simsbury

Operator: Town of Simsbury

Primary Contact: Thomas Roy, Director of Public Works 860-658-3222

Alternate Contact: Kevin Clemens, Highway Superintendent 860-658-3222

2.2 Facility Description

2.3 Structures and Operations Potentially Exposed to Stormwater

The following table describes the activities at the Site of which may be exposed to precipitation.

The Site is located on a parcel of land (approximately 110- acres) and owned by the Town of Simsbury.

The Site is utilized for the storage and transfer of recyclable materials and bulky waste. Operations conducted at the Site occur over approximately 1.5 acres on the northern-most portion of the parcel;

Approximately 1.3 acres of the Site is paved with asphalt, and the remaining surrounding area is grass/ wooded land.

The Office/Garage building is the largest building on-site and is located centrally. This building is utilized as an office and garage (storage only). A concrete unloading dock is located southwest of the office/garage. Town residents unload wastes into roll-offs, including paper materials, bulky waste, glass, and plastics. White goods are stored on a paved area west of the unloading dock. A roll-off is located just north of the white goods storage area, which is utilized for cement, bricks, and stone bulky wastes.

A leaf drop-off area is located north of the white goods area, followed by several conex boxes for tires, universal wastes such as TVs or computers, or scrap metals.

Northwest of the Office/Garage building is the Security/Office Shed, which is utilized for controlling of residential influx into the Site. South of the office/garage is a small pole-barn, which stores sand/salt for residential use, used propane tanks, and a used bicycle drop-off/swap area. Directly northeast of the pole barn is an unloading dock for clean wood and brush. A small woodchip and compost storage area is located north of the clean wood & brush storage area and is utilized by Town residents for small landscaping activities.

An aboveground, 500-gallon tank for used oil is located northwest of the Security/Office Shed. The tank consists of double-walled AST with a concrete pad and berm, and a roof canopy. There is no direct exposure to precipitation.

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Table 2 – Structures and Operations Potentially Exposed to Stormwater

Activity Location Potential Pollutants Materials Management

Practices

Interior

Office/ Garage Buildings 1 Hydrocarbons, oil and grease, fluids

Activities conducted inside buildings on impervious areas. Fueling activities conducted by trained personnel only. Spill response equipment stored nearby.

Exterior

Used oil AST Northwest of Building 1

Hydrocarbons, oil and grease, fluids

Activities conducted under cover and on impervious areas, and by trained personnel only. Spill response equipment stored nearby.

Bulky Waste Roll-off Area Southwest of Building 1

TSS, fugitive dusts, refuse

All unloading/loading activities are supervised by trained personnel. Routine inspections conducted and area swept of refuse frequently.

Pole Barn South of Building 1 TDS, salts, fugitive dusts, hydrocarbons

Activities conducted under cover and on impervious areas, and by trained personnel only. Routine inspections conducted and area swept of refuse frequently. Spill response equipment stored nearby.

White Goods West of Bulky Waste Roll-off

Area

TSS, fugitive dusts, refuse, hydrocarbons, fluids

All unloading/loading activities are supervised by trained personnel. Routine inspections conducted and area swept of refuse frequently. Spill response equipment stored nearby.

Materials inspected for leaks daily; any leaky equipment are immediately removed off-site.

Bulky Waste Cement, Bricks, Stone Roll-off Area

West of Bulky Waste Roll-off

Area

TSS All unloading/loading activities are supervised by trained personnel. Routine inspections conducted and area swept of sediments frequently.

Leaf Drop-off North of White Goods

TSS, TDS, nitrates, phosphorus, E.coli, All unloading/loading activities are supervised by trained personnel. Routine inspections conducted and area swept of sediments frequently.

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The subsections below discuss the activities in the table above and others at the Site, which could potentially cause stormwater pollution.

2.3.1 Vehicle Equipment Maintenance/Washing

2.3.2 Fuel Dispensing Area

2.3.3 Outside Storage

2.3.4 On-site Waste Disposal

Clean Wood & Brush Drop-off Southeast of Building 1

TSS, TDS, nitrates, phosphorus, E.coli

All unloading/loading activities are supervised by trained personnel. Routine inspections conducted and area swept of sediments frequently.

Compost/Mulch Material Storage Northeast of Building 1

TSS, TDS, nitrates, phosphorus, E.coli

All unloading/loading activities are supervised by trained personnel. Routine inspections conducted and area swept of sediments frequently.

Landscaping and other maintenance equipment are stored inside the Office/Garage building. No washing or cleaning is permitted.

Fuel dispensing for on-site equipment is conducted inside the Office/Garage building. Fueling of miscellaneous equipment is conducted utilizing 2 ½ to 5-gallon fueling containers by trained on-site personnel only and is conducted indoors and under cover.

Dispensing of waste oils into the waste oil AST are conducted by on-site, trained personnel only;

Residents are not permitted to empty canisters into the AST. Dispensing of waste oils into the AST is conducted under cover and utilizing proper dispensing techniques. Spill response equipment is stored nearby. When emptying of the waste oil AST, subcontractors will utilize best management practices and proper hose connection techniques. The emptying of the waste oil AST is supervised by on-site, trained personnel.

Recyclable materials and bulky waste are placed in roll-off containers without cover. The roll-off containers are equipped with intact plugs. White goods, leafy and brush materials, and compost/wood chip materials are stored on impermeable surfaces. The double-walled AST used for the storage of waste oil is located under a roof-canopy with a concrete block pad and berm. Several storage areas are uncovered following loading/unloading operations. Every effort should be made to minimize this practice.

All materials entering into the site are removed off-site by subcontractors on a weekly or bi-weekly basis. Leafy or woody materials may stay on-site for an extended period of time; these areas are routinely inspected. Every effort should be made to cover refuse material when not in active loading or unloading operations. Universal wastes and tires are stored inside conex boxes, which are closed and locked when not in use.

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2.3.5 Salt Storage Piles or Piles Containing Salt

2.3.6 Roof Drains and Vents

2.3.7 ASTs

2.3.8 Groundwater

2.3.9 Dust Generation and Vehicle Tracking of Industrial Materials

2.3.10 Other Potential Pollutant Sources

2.4 Spill History

Per the Stormwater General Permit, spills and leaks of 5 gallons or more of toxic or hazardous substances that occurred at the facility 3 years prior should be included in the facility spill history.

Sand/salt are stored in an open-faced pole barn. Materials are stored away from the open face, and the sand/salt accumulation at the entrance is routinely swept and kept tidy. All loading activities are supervised by on-site, trained personnel.

There are no roof drains or vents at the Site.

A 500-gallon waste oil AST is located northwest of the Office/Garage building and under a roof canopy.

The AST is double-walled with integrated monitoring systems. Only trained employees are allowed to transfer oil to and from the tank. Used propane ASTs are stored in an open-faced pole barn. Materials are stored away from the open face of the pole barn. The ASTs are periodically checked for leaks or damage that may result in a release from the environment. Absorbent material is stored nearby.

This section is not applicable because groundwater does not discharge from the Site.

Vehicle tracking of refuse materials may occur at the Site. Paved areas routinely swept and kept tidy.

There are no other potential pollutant sources at the Site.

The Site has not had any reportable spills during the period of operation at the Site.

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3. STORMWATER POLLUTION PREVENTION TEAM

3.1 Team Members and Individual Responsibilities

The Stormwater Pollution Prevention Team at the Facility includes the following members.

Thomas Roy, Team Leader Director of Public Works Telephone Number: 860-658-3222 (office); 860-982-3724 (cell) Responsibilities: Coordinate all stages of Plan development, inspections and implementation; coordinate training program; keep all records and ensure appropriate submittals; and oversee sampling program.

Kevin Clemens, Crew Leader Highway Superintendent Telephone Number: 860-658-3222 (office); 860-371-5883 (cell) Responsibilities: Assist the Team Leader with implementation of the Plan.

3.2 Team Responsibilities

The Stormwater Pollution Prevention Team is familiar with all aspects of this Plan and facility processes and activities, as well as the location of and characteristics associated with oil and chemical substances handled and stored at the Facility. They are also familiar with the location of records pertinent to the SWPP Plan within the facility and the facility layout.

The Team is responsible for Plan development, maintenance and implementation. Team responsibilities include:

1. Develop and implement Control Measures inspection and review procedures;

2. Conduct or oversee regular compliance inspections of the facility and assure documentation and review of these inspections;

3. Review analytical data from storm events for compliance with regulations;

4. Review new construction or facility modifications or changes, as necessary;

5. Make changes in procedures, as necessary, and proper notifications, if required; and

6. Update or revise the SWPPP, as necessary.

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4. STORMWATER MANAGEMENT

Section 4.0 presents a description of stormwater management at the Site and stormwater procedures implemented by facility personnel. This section is divided into three subsections, which discuss (1) Facility

Drainage, (2) Control Measures, and (3) Stormwater Monitoring. These subsections are presented below.

4.1 Control Measures

4.1.1 Good Housekeeping

4.1.2 Vehicle or Equipment Washing

Good housekeeping practices are designed to maintain a clean and orderly work environment. Often the most effective first steps towards preventing pollution in storm water from industrial sites involves using common sense to improve the facility’s basic housekeeping methods. The following are good housekeeping practices completed at the facility:

- Maintaining up-to-date material inventory

- Identify all chemical substances present in the workplace

- Label all containers showing name and type of substance, stock number, etc.

- Scheduling routine cleanup operations

- Maintaining well-organized work areas

- Training employees about good housekeeping practices

The following good housekeeping practices under improvement are as follows:

- All areas around this facility are kept free of refuse and trash.

- Lids are kept closed on trash dumpsters, drain plugs are intact, and the areas are regularly inspected.

- Implementing careful material storage practices

The pickup and disposal of waste products at the facility occur on a routine basis. Employees at the facility routinely inspect operational equipment and storage areas throughout the daily workflow.

Storage containers are inspected before and during usage of the materials stored within. The drums Storage containers are placed on top of appropriately sized secondary containment or stored away from openings inside the buildings. All tanks at the facility are inspected via the routine and semiannual inspection sheets attached in Appendix B. Employees also routinely inspect outdoor storage areas for staining and leaks from tanks.

Vehicle or equipment washing is not conducted at the facility.

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4.1.3 Floor Drains

4.1.4 Roof Areas

4.1.5 Minimize Exposure

4.1.6 Sediment and Erosion Control

Floor drains inside on-site buildings are associated with restrooms that discharge to the sanitary sewer.

There are no roof drains or vents at the Site.

Currently, the storage of bulky waste, leafy debris, composted materials, clean brush, and white goods are exposed to precipitation. Every effort should be made to reduce this practice, particularly with the bulky waste and white goods. Best practices for the storage of these materials is to cover when not in active loading or unloading operations.

Small, unused containers of petroleum for fueling of equipment are stored inside the Office/Garage building. The waste oil AST is equipped with secondary containment and cover.

Vehicles/equipment are stored inside Building 1 overnight, or on permeable surfaces.

The facility's SWPPP must identify activities that present a potential for significant soil erosion and measures taken to control such erosion. There are several grassy or riprapped areas throughout the facility. These areas are well maintained, and do not currently cause erosion concerns. Erosion and sediment control should be monitored as part of the annual visual inspections to ensure no new erosion concerns begin at the facility.

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4.1.7 Management of Runoff

4.1.8 Preventative Maintenance

For the purposes of this Plan, runoff management is defined as practices which divert, infiltrate, reuse or treat stormwater runoff. The outskirts of the Site utilize infiltration practices for stormwater. There are two (2) drainage areas at the Site, which are further described below.

Drainage Area 1 consists of the access road, a portion of the Office/Garage, the Security/Office Shed, the Shed, the waste oil drop-off, conex storage, the open-topped roll-offs, and the leaf-drop off area. One (1) catch basin, located southwest of the Office/Garage building, receives sheet flow from the majority of the surrounding paved areas, and connects into Drainage Area 2. Stormwater may also runoff via sheet flow into grassy areas where it infiltrates into the ground.

Drainage Area 2 consists of the eastern side of the site, containing a portion of the Office/Garage, the loading docks, the pole barn, compost and mulch storage, and clean wood and brush storage. Stormwater is diverted from one (1) catch basin in Drainage Area 1 and discharged into one (1) catch basin in Drainage Area 2. This is the final catch basin prior to discharges to a submerged outfall in Munnisunk Brook. Munnisunk Brook then discharges into the nearby Farmington River. Stormwater may also travel via sheet flow into the catch basin and be discharged to the Outfall. A grassy swale is located on the southeastern swale of Drainage Area 2. Stormwater may enter this swale via grading and sheet flow and infiltrate into the ground.

There is no curbing at the Site; therefore, a moderate amount of sheet flow is diverted to grassy areas surrounding the site and infiltrated into the ground via site grade. On-site catch basins are periodically inspected and cleaned of accumulated sediments and solids.

A preventative maintenance program involves inspections and maintenance of stormwater management devices and routine inspections of facility operations to detect faulty equipment.

Equipment (such as tanks and containers) will be checked regularly for signs of deterioration.

All areas of the facility will be inspected for the following at appropriate intervals as specified in Section 5.2 of this Plan. All areas of the facility will be inspected for the following at appropriate intervals as specified in Section 5.1 of this Plan:

- Leaks or conditions that would lead to discharges;

- Conditions that could lead to direct contact of storm water with raw materials, intermediate materials, waste materials or products;

- Storage tanks, process and material handling equipment, and material bulk storage areas for leaks, corrosion, or other deterioration or non-containment.

All operational equipment at the facility is inspected before usage. If any leaks or spills are noted, or damage to the equipment, the equipment is taken out of production until repairs are completed.

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4.1.9 Spill Prevention and Response

4.1.10 Salt Storage

4.1.11 Future Construction

4.1.12 Non-Stormwater Discharges

The Stormwater Pollution Prevention Team is the designated group accountable for spill prevention at the facility. These people are identified in Section 3 of this Plan.

All oil or hazardous substances are stored in structures or areas equipped with secondary containment and/or spill response equipment. These structures are designed to contain released material and prevent releases from traveling beyond the property boundaries. Travel of a spill outside of secondary containment or off-site is not likely unless the secondary containment structures also fail.

A chain reaction of failures is not considered probable. As mentioned in Section 4.1, much of the property at the Site is relatively flat and paved. As such, in the event of a small release outside of containment, spilled product from a tank or container would likely pool in the vicinity.

However, larger releases could flow off-site. In the event of larger releases, a nearby spill kit will be utilized to surround the spill and/or nearby catch basins.

Pollution Prevention Team will immediately notify the CT DEEP by calling 866-337-7745. If requested by CT DEEP, the DPW, with the assistance of Atlas, will prepare and submit to the CT DEEP a completed “Report of Petroleum or Chemical Product Discharge, Spillage, or Release”. This corrective action report should be submitted within 48 hours of discovering the release. A copy of the corrective action report is provided in Appendix D.

If the spill violates applicable water quality standards, causes a film or sheen on, or discoloration of surface water, or causes a sludge or emulsion to be deposited beneath the surface of the water, then the Town of Simsbury DPW will immediately notify the National Response Center (NRC) at 800-424-8802. Refer to Appendix D for more information.

Additionally, should a spill event occur at the Site, the Stormwater Pollution Prevention Team would complete the Corrective Action Log and record the details of the incident.

Sand and salt storage is periodically inspected to ensure sediments are kept within the pole barn. Periodic sweeping is completed to remove any accumulation of sediments is completed on an as-needed basis.

Any future construction activity that disturbs greater than one (1) acre will be conducted in accordance with CT DEEP regulations and will comply with the 2002 Connecticut Guidelines for Soil Erosion and Sediment Control during construction, and the 2004 Connecticut Stormwater Quality Manual for the design and implementation of post-construction stormwater management measures. The facility will avoid, wherever possible, the use of copper or galvanized roofing or building materials for any new building construction where these materials will be exposed to stormwater.

The stormwater drainage system at the Facility was observed by Atlas in the spring of 2023 to determine if there were any non-stormwater-related discharges occurring. No non-stormwater discharges occur at the Site.

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Table 3 contains a summary of the potential pollutant sources at the Site and how some of the Control Measures discussed above apply to each.

Table 3 – Control Measures

4.2 Stormwater Monitoring Program

The Stormwater General Permit specifies required stormwater monitoring. The site has met all benchmark requirements for stormwater sampling. The stormwater monitoring program for the Site is as follows, and has been provided for informational purposes only.

4.2.1 Schedules and Test Parameters

The Stormwater General Permit requires semi-annual testing and specifies the parameters to be analyzed in the stormwater outfall sample. The following Table 4 summarizes the parameters to be tested for in the stormwater sample collected from the outfall.

The facility is subject to effluent limitations YES □ NO

Stormwater from the facility discharges to the following waterbody ................................... Munnisunk Brook

The area of this waterbody to where stormwater from the Facility discharges is designated as an impaired waterbody.

YES □ NO

This waterbody is impaired due to the presence of the following contaminants.

Potential Pollutant Source

Good Housekeeping Minimize Exposure Spill Prevention

Vehicle Equipment- Maintenance

Maintain area in reasonable clean condition

Perform inside buildings only

Maintain spill response equipment nearby

AST and Waste Oil Transfers

Maintain area in reasonably clean condition

Clearly Labeled Immediate cleanup of any drips Integrity of the AST is regularly inspected.

Utilize proper equipment to empty small waste oils into the AST

Perform under cover only.

Minimize oil transfers during rain events.

Conducted only by on-site personnel.

Maintain spill response equipment nearby.

Do not overfill AST.

Monitor all transfer events.

Outside Storage Maintain area in reasonably clean condition

All storage areas are clearly labeled

Cover all exposed roll-offs or dumpsters when not in active loading or unloading operations

Sweep regularly

Maintain spill response equipment nearby.

Monitor all transfer events.

Salt Storage Maintain area in reasonably clean condition

Store inside building Sweep paved areas periodically

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Table 4 – Stormwater Sampling Parameters and Limits

SECTOR SPECIFIC MONITORING REQUIREMENTS

There are no additional Sector C monitoring requirements for the Site.

IMPAIRED WATERS MONITORING REQUIREMENTS

Any potential discharge through the outfall would reach Munnisunk Brook. The portion of Munnisunk Brook that the Site discharges to is considered an impaired waterway (E.coli with an established TMDL). For stormwater discharges to waters for which there is an established TMDL, the permittee is not required to monitor for the indicator pollutant (E.coli) unless informed by writing by the CTDEEP.

4.2.2 Sample Collection

Sampling should be conducted according to the following criteria.

1. Sampling is to be conducted during a storm event generating a stormwater discharge that occurs at least 72 hours after any previous storm event that generated a stormwater discharge. This is referred to as a qualifying event.

Sampling Parameter1 Regulatory Criteria Sampling Frequency

S.U.2

Uncontaminated Rainfall pH NE3 Semi-Annual4

Stormwater pH 5-9 Semi-Annual mg/L5

Total Copper 0.059 Semi-Annual

Total Lead 0.076 Semi-Annual

Total Zinc 0.160 Semi-Annual

Total Suspended Solids 90 Semi-Annual

Total Oil and Grease 5 Semi-Annual

Chemical Oxygen Demand 75 Semi-Annual

Total Phosphorus-P 0.40 Semi-Annual

Total Kjeldahl Nitrogen 2.30 Semi-Annual

Nitrate-N 1.10 Semi-Annual

Aquatic Toxicity LC50≥50%6 Annual7

Notes:

1. All parameters listed in table are Standard Monitoring Benchmarks unless otherwise noted.

2. SU = Standard Units

3. NE = None Established

4. The semi-annual monitoring periods are October 1 to March 31 and April 1 to September 30.

5. mg/L = milligrams per liter

6. The 48-hour Acute Toxicity LC50 value (% Survival) must be greater than 50%.

7. Aquatic Toxicity monitoring is required annually for the first two (2) years of sampling. The monitoring period is October 1st to September 30th.

The Munnisunk Brook is impaired with E.coli, with an established TMDL.

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2. Monitoring events are to be separated by at least 30 days.

3. Grab samples are to be used for all monitoring. Grab samples are to be collected within the first 30 minutes of a storm event discharge.

4. All samples must be taken during the same storm event, if feasible.

5. Stormwater discharge containing snow or ice melt may be used, but must be noted on the sample reporting form.

For each storm event monitored, the following information is collected.

1. The date, discharge temperature, time of the start of the discharge, time of sampling at each outfall and magnitude (in inches) of the storm event sampled; and

2. The duration between the storm event and the end of the previous stormwater discharge event.

The following outline describes the stormwater sample collection and laboratory testing procedures followed for the outfall.

1. Collect the samples directly from the outfall. Fill the collection containers with stormwater without touching the insides of the containers. Cover the containers when finished.

2. Label all samples and store samples in a cooler or refrigerator at 4o C.

3. Prepare a Chain of Custody and transport the samples to the laboratory as soon as possible (less than 24 hours after sampling).

4. Unless otherwise specified in the Stormwater General Permit, all pollutant parameters must be tested according to methods prescribed in 40 CFR 136.

5. Acute toxicity biomonitoring tests must be conducted according to the procedures specified in Methods for Measuring the Acute Toxicity of Effluents and Receiving Waters to Freshwater and Marine Organisms, 5th edition (EPA 821-R-02-012).

4.2.3 Recordkeeping and Reporting Requirements

For each stormwater sample taken, the following information is recorded.

1. The place, date and time of sampling;

2. The person(s) collecting the samples;

3. The dates and times the analyses were initiated;

4. The person(s) or laboratory who performed the analyses;

5. The analytical techniques of methods used; and

6. The results of all required analyses.

A log for recording this data is presented in Appendix E.

After collection of 4 semi-annual samples, if the average of the 4 monitoring values for any parameter does not exceed the benchmark, the monitoring requirements for that parameter have been fulfilled for the term of the Stormwater General Permit. Once the benchmark for sample pH has been met and monitoring for pH has been fulfilled, the measurement of rainfall pH is no longer required.

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Within 120 days of receiving the results of the fourth semi-annual sample, if the average of the 4 semi-annual monitoring values for any parameter exceeds the benchmark, the Town will review the selection, design, installation and implementation of the Control Measures to determine if modifications are necessary to meet the benchmarks, and either:

Make the necessary modifications to the Control Measures and SWPP Plan and continue semi-annual monitoring until 4 consecutive semi-annual monitoring events have been completed for which the average does not exceed the benchmark; or

Make a determination that no further pollutant reductions are technologically available and economically practicable and achievable in light of best industry practice to implement additional control measures or meet the benchmarks, in which case the Facility must continue monitoring once per year. The Site will also document the rationale for concluding that no further pollutant reductions are achievable and submit this documentation to the CT DEEP for written approval. The Site will retain all records related to this documentation with the SWPP Plan.

If an exceedance of the 4-event average is mathematically certain, the Site will review the control measures and perform any required corrective action immediately or document why no corrective action is required, without waiting for the full four (4) monitoring events. If, after modifying the control measures and conducting additional semi-annual monitoring, the average of the most recent four (4) monitoring events still exceeds the benchmark, or if an exceedance of the benchmark by the 4-event average is mathematically certain for the most recent four (4) monitoring events, the Site will again review the control measures and take one of the two actions above.

The CTDEEP has established a Stormwater Monitoring Report (SMR) Form that is to be completed and submitted for each outfall sampled. Monitoring results are submitted to the CTDEEP within 90 days of the date of the sampling. If a discharge does not occur during a monitoring period, a SMR must still be submitted, and a notation of “No Discharge” will be made on the form.

A signed and dated original of the SMR Form is submitted to the CT DEEP at the following address:

Water Toxics Program Coordinator Bureau of Water Protection and Land Reuse Department of Energy & Environmental Protection 79 Elm Street Hartford, CT 06106-5127

A sample copy of an SMR is found in Appendix E. Copies of the completed SMRs may be kept in Appendix E. If the Site monitors its stormwater more frequently than required by the Stormwater General Permit, it will also report those results to the CTDEEP.

At this time, the Site has met all sampling requirements and is not required to submit an SMR to

CTDEEP.

Page | 16

5. TRAINING, INSPECTIONS, AND RECORDKEEPING

This section of the SWPPP describes the Training, Inspections, and Recordkeeping procedures for the Site. Appendix B contains recordkeeping log forms for inspections, and Appendix C contains recordkeeping log forms for training and Plan revisions. All records of inspections, training and Plan revisions are maintained by the Stormwater Pollution Prevention Team and may be kept with the SWPPP.

5.1 Training

All training will be held on an annual basis. Any personnel associated with Site operations or product handling at the Site is required to attend the training.

The training topics include the following items:

1. Instructions on the contents of this SWPP Plan.

2. Discussion of the Stormwater Pollution Prevention Team and its responsibilities.

3. A review of the proper Control Measures to be used by employees on a regular basis, including spill prevention and response; standard housekeeping measures; and materials and waste handling procedures.

4. A review of the most recent stormwater Comprehensive Site Compliance Evaluation results and any resulting changes to the SWPP components of this Plan.

5.2 Inspections

The Stormwater Pollution Prevention Team is responsible for the entire Site and its proper operation. Site inspections are conducted by at least one member of the Team or by a qualified professional.

Inspection logs for this SWPPP have been developed for the Site. The logs are designed to meet the inspection requirements of the Stormwater General Permit regulation. A copy of the logs is presented in Appendix B. Records of inspections are maintained by the Stormwater Pollution Prevention Team and may be kept with the SWPPP. The sections below describe the components of the Site inspections.

5.2.1 Routine Inspections

On a monthly basis, at least one member of the Stormwater Pollution Prevention Team or someone designated by it conducts a walkthrough of the Site. At a minimum, the AST area and bulky waste storage areas are inspected to ensure that all equipment and structures are in a satisfactory condition. Routine Facility Inspections Forms can be found in Appendix B.

5.2.2 Stormwater Visual Inspections

Visual inspections of stormwater are conducted quarterly throughout the period of Stormwater General Permit coverage. For monitoring purposes, quarters will begin on January 1, April 1, July 1, and October 1.

Inspections are conducted during a qualifying rain event. If no qualifying rain event occurs during the quarter, a letter will be entered into the file documenting such. Visual monitoring of stormwater is conducted during the first 30 minutes of the rain event. The examination documents observations of color, odor, clarity, floating solids, settled solids, suspended solids, foam, oil sheen and other obvious indicators of stormwater pollution. The inspection is documented. The inspection form is presented in Appendix B.

If the visual assessment indicates the Control Measures for the Site are inadequate or are not being properly operated and maintained, the Town will review and revise the selection, design, installation, and implementation of the Control Measures to ensure that the condition is eliminated and will not be repeated in the future. Record of this documentation will be maintained in the SWPPP.

Page | 17

5.2.3 Stormwater Comprehensive Site Compliance Evaluations

Comprehensive Site Compliance Evaluations are conducted every six months at the Site by one or more persons either on the Stormwater Pollution Prevention Team or designated by it. All potential sources of pollution identified in Section 2.2 of this Plan are inspected to assure that appropriate Control Measures (Section 4.2) are implemented. Any modification, including the elimination, movement, or creation of an exposed area or pollution source, is documented. The SWPPP is updated to reflect this information as needed.

The semi-annual inspections are conducted, when possible, during a rainfall event. The Comprehensive Site Compliance Evaluation Form is presented in Appendix B. Any deficiencies observed during the evaluation are noted on the Form.

Within thirty days of the inspection, follow-up actions are taken to correct any deficiencies. If the corrections cannot be made within the thirty-day period, a schedule for implementation of the corrections is added to the SWPPP within the thirty-day period. The Form and/or follow-up actions are maintained by the Stormwater Pollution Prevention Team.

5.3 Recordkeeping

This SWPPP and all training, inspection, recordkeeping and testing records associated with it are maintained at the Site for a minimum of five years following the expiration of the Stormwater General Permit.

Records are signed by an appropriate supervisor, where applicable. Modifications to this Plan are recorded in the Revisions Log in Appendix C.

Page | 18

6. PLAN REVIEW AND AMENDMENT

Atlas recommends that this Plan be reviewed at least annually by the Stormwater Pollution Prevention Team to verify that it represents current facility conditions and complies with current regulations. During this review, the Town of Simsbury should check with a qualified environmental consultant or the CTDEEP to verify that the most current governing regulations are incorporated.

The Town will amend this Plan within 120 days whenever the Site experiences any of the following conditions:

a substantial change which has a significant effect on the discharge, or potential for discharge, of pollutants in stormwater from the Site;

an inspection, investigation or monitoring event which shows that the SWPPP is not effectively controlling or eliminating pollutants in stormwater discharges;

a failure of the SWPPP to ensure or adequately protect against pollution of the waters of the state;

a request by the Commissioner of the CTDEEP to modify the SWPPP; or a notification that they are subject to requirements because the receiving water to which it discharges stormwater has been designated as impaired under Section 303(d) of the Clean Water Act and as identified in the most recent State of Connecticut Integrated Water Quality Report, or a TMDL has been established for the receiving water.

These amendments will be effective when re-certified by a Professional Engineer licensed to practice in Connecticut or a Certified Hazardous Materials Manager and will be recorded in the Revisions Log included in Appendix C.

Page | 19

7. IMPLEMENT ITEMS

The following recommendations have been made based on Atlas’s site inspection, an SWPPP review conducted by the certifying Professional Engineer

Table 5 – Implementation Items

Recommendations Completed

Date Initials

Review the SWPP Plan at least annually to verify that it represents current facility conditions and complies with current regulations.

Install and/or implement covers for open-topped roll-offs, organic material storage areas, and white goods areas.

FIGURE 1

SITE LOCUS

290 Roberts Street, Suite 301 East Hartford, CT. 06108 860-282-9924

USGS Topography Map

DESIGNED BY: KLL SCALE: NTS

DRAWN BY: KLL DATE: 7/2023 Figure 1.

REVIEWED BY: DPB

SOURCE: USGS Topographic Map, Tarriffville, Connecticut, Quadrangle, 7.5 Minute Series, dated 2021.

Project: Bulky Waste Storage Facility (Transfer Station) Client: Town of Simsbury

Site Address: 66 Wolcott Road, Simsbury, Connecticut

Site Locus

Site

FIGURE 2

SITE PLAN

Office/Garage

Mulch Lawn

Lawn

Lawn

Compost

Shed

Salt/Sand

Propane

Bicycles

Loading Dock

Clean Wood and Brush

Grassy Swale

GW

Security/ Office Shed

Waste Oil Drop-off

Con-Ex Storage

Leaf Drop-Off

Area

Loading Dock

White Goods

Bulky W aste Bulky W aste

Newspaper

Loading Dock

Loading Dock

Corrugated Cardboard Compactor

Nonprocessable Waste

Containers (Glass, Tin, Plastic)

Low Grade Paper and Magazines

Gravel Road

To Wolcott Rd

Roll-Off Storage

SP

Con-Ex Storage

Brick, Cement, and Stone Waste

Roll-Off Storage (Clean Wood and Brush)

Pole Barn

Munnisunk Brook

Grass

Wooded

Wooded

Wooded

Wooded

Wooded

Wetlands

Wetlands

DESIGNED BY:

DATE:SCALE:

DRAWN BY:

COMPUTER CADFILE :

APPROVED BY:CHECKED BY:

JOB NO.: FIGURE NO.:

TITLE:

CLIENT:

PROJECT:

CADFILE

ML

June 20231"=40'

ML

12419023001

KL

KL

66 Wolcott Road Simsbury, CT

GW

AutoCAD SHX Text

GRAPHIC SCALE:

AutoCAD SHX Text

TRANSFER STATION SITE PLAN

AutoCAD SHX Text Town of Simsbury

AutoCAD SHX Text

SWPPP

AutoCAD SHX Text General Notes:

AutoCAD SHX Text plan should not be used for construction or

AutoCAD SHX Text depicted on this plan are approximate. This

AutoCAD SHX Text All locations, dimensions, and property lines

AutoCAD SHX Text land conveyance purposes.

AutoCAD SHX Text Catchbasin

AutoCAD SHX Text Flow Direction Indicator

AutoCAD SHX Text Legend

AutoCAD SHX Text Groundwater Monitoring Well

AutoCAD SHX Text measurements made by representatives of Atlas.

AutoCAD SHX Text Horizontal, and vertical locations of wells, and

AutoCAD SHX Text selected site features determined through

AutoCAD SHX Text 290 Roberts Street, Suite 301 * East Hartford, CT 06108

AutoCAD SHX Text Phone: 860-282-9924 Fax: 737-207-8276

AutoCAD SHX Text Storm Sewer Line

AutoCAD SHX Text Storm Water Outfall

AutoCAD SHX Text Rip-Rap

AutoCAD SHX Text Treeline

AutoCAD SHX Text Building

AutoCAD SHX Text Concrete Block Wall

AutoCAD SHX Text Drainage Area 1

AutoCAD SHX Text Drainage Area 2

AutoCAD SHX Text Wetlands

APPENDIX A

CERTIFICATIONS

Facility Management Approval

I certify under penalty of law that this document and all Appendices 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.

Name: Title:

Signature: Date:

Connecticut P.E. Certification

“I certify that I have thoroughly and completely reviewed the Stormwater Pollution Prevention Plan prepared for this site. I further certify, based on such review and site visit by myself or my agent, and on my professional judgment, that the Stormwater Pollution Prevention Plan meets the criteria set forth in the General Permit for the Discharge of Stormwater Associated with Industrial Activity effective on October 1, 2011. I am aware that there are significant penalties for false statements in this certification, including the possibility of fine and imprisonment for knowingly making false statements.”

Name: David Brassard Title: Senior Project Manager, LEP, P.E.

Signature:

Date:

License #:

7/5/2023

019366

Non -Stormwater Discharge Certification

“I certify that in my professional judgment, the stormwater discharge from the site consists only of stormwater, or of stormwater combined with wastewater authorized by an effective permit issued under section 22a-430 or section 22a-430b of the Connecticut General Statutes, including the provisions of this general permit, or of stormwater combined with any of the following discharges provided they do not contribute to a violation of water quality standards:

• landscape irrigation or lawn watering;

• uncontaminated groundwater discharges such as pumped groundwater, foundation drains, water from crawl space pumps and footing drains;

• discharges of uncontaminated air conditioner or refrigeration condensate;

• water sprayed for dust control or at a truck load wet-down station;

• naturally occurring discharges such as rising groundwaters, uncontaminated groundwater infiltration (as defined at 40 CFR 35.2005(20)), springs and flows from riparian habitats and wetlands.

This certification is based on testing and/or evaluation of the stormwater discharge from the site. I further certify that all potential sources of non-stormwater at the site, a description of the results of any test and/or evaluation for the presence of non-stormwater discharges, the evaluation criteria or testing method used, the date of any testing and/or evaluation, and the on-site drainage points that were directly observed during the test have been described in detail in the Stormwater Pollution Prevention Plan prepared for the site. I further certify that no interior building floor drains exist unless such floor drain connection has been approved and permitted by the commissioner or otherwise authorized by a local authority for discharge as domestic sewage to sanitary sewer. I am aware that there may be significant penalties for false statements in this certification, including the possibility of fine and imprisonment for knowingly making false statements.”

Name: Kay Lehoux Title: Environmental Compliance Manager

Signature:

Date:

6/26/2023

APPENDIX B

INSPECTION LOGS AND FORMS

ROUTINE FACILITY INSPECTIONS

BMP/activity Implemented? Maintenance Required?

Corrective Action Needed and Notes

1 Are all slopes and disturbed areas not actively being worked properly stabilized?

Yes No Yes No

2 Are natural resource areas (e.g., streams, wetlands, mature trees, etc.) protected with barriers or similar BMPs?

3 Are perimeter controls and sediment barriers adequately installed and maintained?

4 Are discharge points and receiving waters free of any sediment deposits?

5 Are storm drain inlets properly protected?

6 Is trash/litter from work areas collected and placed in covered dumpsters?

7 Are vehicle and equipment fueling, cleaning, and maintenance areas free of spills, leaks, or any other deleterious material?

8 Are non-stormwater discharges (e.g., wash water, dewatering) properly controlled?

9 (Other)

SWPP Plan

Recyclables Bulky Waste Transfer Station 66 Wolcott Road, Simsbury, CT

Recyclables Bulky Waste Transfer Station

Simsbury, Connecticut

STORMWATER QUALITY

Quarterly Visual Inspection Log

Inspector Name: Date: Time:

Outfall Location/Description: OF-1: Discharge to wetlands/pond area. Upgradient CB for visuals.

Start time of current storm event:

Visual inspection within first 30 minutes of stormwater discharge? Y N (circle one)

Storm event notes/observations:

Current storm: ________ inches Nature of Discharge: rain snowmelt icemelt (circle one)

Last qualifying storm event at least 72 hours prior to sampling? Y N (circle one)

Item/Condition in Stormwater to be Checked

Yes

No

Observation/

Deficiency

Corrective Action &

Date

Is the stormwater free of color?

Is the stormwater free of odor?

Is the stormwater clear?

Is the stormwater substantially free of floating, suspended or settled solids?

Is the stormwater free of foam?

Is the stormwater free of an oil sheen?

Any additional visual stormwater quality observations?

SWPP Plan Recyclables Bulky Waste Transfer Station June 2023 Simsbury, Connecticut

COMPREHENSIVE SITE COMPLIANCE EVALUATION

Semi-Annual Visual Inspection Log

Inspector: Permittee Signature:

Date: Time:

Potential Pollutant Source

Good Housekeeping Minimize Exposure Spill Prevention Problems Identified

Corrective Action Taken & Date Accept. See Notes Accept. See Notes Accept. See Notes

Loading/Unloading

Propane ASTs

Waste Oil AST

Outside Storage Areas (Roll-offs, woody and leafy materials, compost, white goods)

Sand Storage

Stormwater Drainage System

Spill Response Equipment adequacy: Absorbent Pads and Booms (Yes/No):

Fire Extinguishers (Yes/No):

Sediment, Erosion, & Dust Control adequacy (Yes/No):

APPENDIX C

TRAINING AND PLAN…