HomeMy WebLinkAbout2021-040 SWM O & M Report 2023-08-25
SITE OPERATION and MAINTENANCE PLAN
for
Multi-Family Housing
900 Old Stage Road
Centerville, Massachusetts 02632
Prepared for:underground
Bayridge Realty, LLC
August 25, 2023
BAXTER NYE ENGINEERING & SURVEYING
Registered Professional Engineers, Land Surveyors & Scientists
1597 Falmouth Rd., Suite 1, Centerville, MA
Tel: (508) 771-7502 Email: info@baxter-nye.com
Site Operation and Maintenance Plan Multi-Family Housing Project
August 25, 2023 900 Old Stage Road, Centerville, MA
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TABLE OF CONTENTS
INTRODUCTION ........................................................................................................................................................3
SMS INSPECTIONS AND MAINTENANCE ..............................................................................................................3
Unscheduled Maintenance .....................................................................................................................................4
General Maintenance ..............................................................................................................................................4
Quarterly Maintenance ............................................................................................................................................5
Major Maintenance..................................................................................................................................................6
Project Inspection Reporting ...................................................................................................................................6
SOLID WASTE MANAGEMENT ................................................................................................................................7
Covered Trash/Storage Areas ................................................................................................................................7
SPILL PREVENTION PLAN AND CONTROL PROCEDURE....................................................................................7
Source Control ........................................................................................................................................................7
Spill Prevention And Material Management Practices ............................................................................................7
Spill Control .............................................................................................................................................................8
SPILL RESPONSE & NOTIFICATION .......................................................................................................................9
Assessment – Initial Condition ................................................................................................................................9
Initial Notification .....................................................................................................................................................9
Further Notification If Required ...............................................................................................................................9
EDUCATIONAL PROGRAM ................................................................................................................................... 10
ATTACHMENT A – INSPECTION LOG .................................................................................................................. 11
Site Operation and Maintenance Plan Multi-Family Housing Project
August 25, 2023 900 Old Stage Road, Centerville, MA
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INTRODUCTION
This plan is intended to provide guidelines for the Multi-Family Housing Project at 900 Old Stage Road in Centerville,
MA (the Project) for the proper Operation and Maintenance (O&M) of the stormwater management and drainage
system (SMS), and discuss general guidelines for the management of solid waste and response to hazardous spills.
The O&M Plan will be conducted for the Project by facilities staff that have been educated and trained to understand
the general functions of the O&M. The frequency and extent of minimum maintenance is outlined herein. More
frequent cleaning, repair, or maintenance may be necessary based on weather and other conditions. Future
development of the overall site area may result in changes to this plan.
SMS INSPECTIONS AND MAINTENANCE
A system for stormwater runoff collection and management has been designed using BMP’s (Best Management
Practices) as defined by Mass Dept. of Environmental Protection (MDEP) for the project. The collection and
conveyance system is comprised of overland flow through curb openings to sediment forebays. These systems
collect, treat, attenuate and convey the runoff to the catch basins and the underground infiltration facilities. All the
runoff from the building roof area is captured and conveyed directly to the underground infiltration systems. These
systems control and infiltrate stormwater runoff through the 100 year storm events and assist in removing
suspended solids including sediments, oil and grease from the stormwater run-off while allowing for nitrogen uptake
through the vegetation. The facilities as sized will retain and infiltrate the runoff through the 100-year storm event.
The sediment forebays will act to control heavier sediment loads from the site during construction, and will remain
in place for this parcel as designed. The devices described above are referred to as the stormwater management
and drainage system (SMS).
To keep the SMS functioning properly and to ensure that the stormwater TSS and other pollutants are reduced,
periodic maintenance is required. The owner/operator of the Project facility is responsible for the periodic
maintenance requirements of the O&M Plan for the SMS. The following is a guideline of the minimum maintenance
schedules and tasks required to keep the SMS functioning properly.
Site Operation and Maintenance Plan Multi-Family Housing Project
August 25, 2023 900 Old Stage Road, Centerville, MA
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Unscheduled Maintenance
The following inspections and maintenance activities should be completed after each rain event in excess of two-
and one-half inches (2.5”), or after any significant event accompanied by high winds. General judgment needs to
be used. If there appears to be significant debris after a storm event, maintenance personnel should walk the site
to inspect for and address the following:
1. Inspect the curb opening inlets, slopes, swales, and riprap areas for debris. Remove any branches, trash
or other large debris.
2. Inspect roof downspouts, leaders and outfalls to ensure they are not clogged. If roof leaders are clogged,
they shall be cleaned out by snaking or other acceptable means.
3. Inspect the sediment forebays for debris. Remove any branches, trash or other large debris.
4. Inspect the Cultec system through the inspection ports for debris. Remove any branches, trash or other
large debris.
5. Inspect the catch basins within the sediment forebays. Inspect to make sure the grated inlet area at the
catch basins to the underground piping is clear and unobstructed.
General Maintenance
The following inspections and maintenance activities must be completed on a regular basis as conditions warrant:
1. Maintain the vegetated side slopes and bottom of the sediment forebays and drainage swales. Areas that
consist of grass standing are to be mowed at least once per year to prevent undesirable woody vegetation
from taking hold. Remove any grass clippings and trimmings from the swm areas to prevent them from
impeding the flow of stormwater or slowing infiltration rates.
2. In the fall remove any accumulated leaves from the curb openings, swales, and forebays. Prevent fallen
leaves from accumulating over and blocking any inlets.
3. In the spring perform a cleanup to remove any accumulated leaves, branches, or debris from the SMS. The
forebays, vegetated swales, and infiltration systems shall be inspected for cracking, erosion, and
accumulated sediment. Sediment removal and repair of the area shall occur as needed. Sediment removal
shall be done by either hand or vacuum. Damage to the area must absolutely be avoided. All areas shall
be raked out and stabilized after removal of sediment or debris as needed.
4. Sediment from catch basin sumps shall be removed when it’s depth reaches 24” (this would put sediment
to within 24” of the outlet invert on 4 foot sumps). Catch basins should be inspected in the spring and
Site Operation and Maintenance Plan Multi-Family Housing Project
August 25, 2023 900 Old Stage Road, Centerville, MA
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sediment removed by vacuum or clam shell or other appropriate method. Care shall be made to not
damage the hood in the catch basin. If it is damaged it shall be replaced per the original detail within the
plans.
Quarterly Maintenance
The following inspections and maintenance activities must be completed quarterly (generally January 15, April 15,
July 15, October 15 or other acceptable quarterly dates):
1. Clean the parking area with a street sweeper or vacuum to reduce the amount of sediment entering the
SMS. The property will be cleaned in this manner with at least one sweeping per season.
2. Inspect curb openings for debris. Remove any branches, trash or other large debris that could interfere
with the proper operation of the outlet of the curb opening. Remove accumulated sediment around the
opening.
3. Inspect the swales for debris. Remove any branches, trash or other large debris that could interfere with
the proper operation. Remove any accumulated sediment, by the use of hand tools (shovels, rakes,
wheelbarrows, etc.) when it exceeds six-inches (6”) but not less than annually.
4. Inspect all stone riprap outfalls and overflow areas. The stone acts to stabilize the ground but also dissipate
the erosive velocities and energy in the stormwater runoff. Stone riprap aprons are intended to slow the
stormwater runoff and allow it to permeate through the stone to downstream areas. To keep the stone
functioning as intended it shall be cleaned of sediment and debris. If stone has moved or broken down it
shall be replaced and chinked to interlock stones together. Add stone to these areas as needed as the
stone settles or is transported to keep these areas stabilized. Any cracking, channeling in soil or erosion
shall be repaired immediately.
5. Inspect all areas for erosion, cracking, or excessive sediment transport. Repair any erosion or cracking
areas immediately.
6. Inspect the sediment forebays for debris. Remove any branches, trash or other large debris. Remove any
accumulated sediment, by the use of small mini-track (“Bobcat” or equivalent) equipment if needed or by
hand (shovels, rakes, wheelbarrows, etc.) when it reaches a maximum of six-inches (6”) but not less than
annually. Vegetation shall be inspected to ensure a reasonable growth and survival rate of at least 75% of
the plantings. Dead or dying vegetation shall be replaced in-kind or with equal plantings.
Site Operation and Maintenance Plan Multi-Family Housing Project
August 25, 2023 900 Old Stage Road, Centerville, MA
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Major Maintenance
The following inspections and maintenance activities must be completed annually (April 15 or another acceptable
date):
1. Inspect the swales and sediment forebay areas for accumulated sediment. Remove buildup of sediment
in the swales and forebays when it reaches a maximum of 12 inches in depth. Restore the forebays to the
original elevation and volume per the design drawings. Dispose of the sediment in a legal and lawful
manner.
2. The stone riprap aprons may require periodic reconstruction. This will need to occur when during the
months of April through November (when the ground is not frozen). If the section upstream of a stone
check dam fails to drain within 48-hours (2-days) after the completion of a rainfall event, the stone check
dam should be removed and reconstructed in accordance with the original design drawings.
3. Inspect the underground SWM chamber systems at inspection ports. This should be done at least 72 hours
after any rainfall. Open the inspection port provided in each row. The inlet row should be the main
inspection port reviewed but all chamber rows should be inspected. Look for standing water or excessive
accumulated sediment (in excess of 4”). If standing water is seen in the chambers after 72 from any rainfall
the chamber system may not be infiltrating properly anymore. In this case, the chambers should be
inspected via CCTV camera inspection, cleaned through vacuuming out of the sediment through the
inspection ports and the inlet pipe (or other methods recommended by the Manufacturer of the chambers).
Monitoring or vacuuming of the sediment out of the chambers shall be performed with a CCTV camera
system to ensure there is not removal of any stone in the system.
Project Inspection Reporting
A site maintenance log will be kept. This log will record the dates of completion of maintenance task, the person or
company who completed the task, and any observations of malfunctions in components of the stormwater
management system (SMS).
Inspections are to be performed by owner rep personnel educated with the general understanding of the SMS
functions, maintenance and repair requirements. In addition to the inspection requirements identified above for the
Project SMS, the inspector must look for evidence of, or the potential for, pollutants entering the storm water system
and take action to remediate any of these potentials.
For each site inspection, a SMS Inspection Form in accordance with Attachment A shall be completed and filed for
the Project. The completed forms should be maintained for three years on the Project site.
Site Operation and Maintenance Plan Multi-Family Housing Project
August 25, 2023 900 Old Stage Road, Centerville, MA
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SOLID WASTE MANAGEMENT
The solid waste program for the Project shall be in conformance with applicable Massachusetts’ regulations which
emphasizes recycling.
All waste material will be collected and stored in covered metal dumpsters or other acceptable waste containers
leased from a license solid waste management company. Containers will meet all local and state waste
management regulations. All general waste materials from the site will be deposited in the containers; and the
dumpster will be emptied as necessary. General waste will be hauled by a licensed contractor and disposed in
accordance with federal, state and local environmental regulations.
Any hazardous or bio-waste materials will be disposed of in accordance with all federal, state and local
environmental regulations.
Covered Trash/Storage Areas
Trash dumpsters, compactors or other raw or waste materials will be covered to prevent contact with stormwater
and will be placed on concrete pads. Dumpsters, waste materials and recyclable materials will be maintained within
the refuse enclosure area.
SPILL PREVENTION PLAN AND CONTROL PROCEDURE
All maintenance personnel will be instructed regarding the following spill prevention practices and procedures.
Source Control
The first place to start in controlling pollution spills is reducing the chances and amounts of this at the source. Source
control of pollution relies on reducing potential pollutants on site. Part of the source controls involves constraints
on materials used in or generated by site maintenance. Trash removal, designated trash storage areas, pavement
sweeping and controlled use of fertilizer on the site will reduce the pollutant load in the site’s stormwater
management system. The Project owners shall educate maintenance personnel on the proper use and storage of
potentially hazardous and hazardous materials.
Spill Prevention And Material Management Practices
Use of any hazardous materials on site will comply with all applicable spill control and prevention requirements,
including maintaining spill containment and clean-up equipment on site as appropriate. Storage of materials on site
such as pesticide, herbicide, fungicide, and fertilizer will be kept to a minimum to reduce the possibility of spills.
Site Operation and Maintenance Plan Multi-Family Housing Project
August 25, 2023 900 Old Stage Road, Centerville, MA
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The following material management practices will be used to reduce the risk of spills or other accidental exposure
of materials and substances to stormwater runoff. These include good housekeeping practices and guidelines for
the handling of hazardous products.
The following good housekeeping practices will be followed on the Project site:
· All materials stored on-site will be stored in a neat orderly manner.
· Products will be kept in their original containers with original manufacture’s label to allow for proper
identification of the material.
· All containers will be tightly sealed and stored when not required for use. Excess materials will not be
discharged to the stormwater system, but will be properly disposed according to manufacturer’s
instructions, state and local regulations.
· Slow release organic fertilizers will be used to the maximum extent possible and applied only in the
minimum amounts recommended by the manufacturer.
· Substances will not be mixed with one another unless recommended by the manufacturer.
· Whenever possible, all of a product will be used before disposing of the container.
· Manufacturer’s recommendations for proper use and disposal will be followed.
· Inspect the storage area weekly to ensure proper use and disposal of materials.
· If surplus product must be disposed, manufacturers or local and state recommended methods for proper
disposal will be followed.
Spill Control
In addition to the good housekeeping and material practices discussed above, the following practices will be
followed for spill control and cleanup.
· Manufacturer’s recommended methods for spill cleanup will be understood and maintenance personnel will
be educated on the procedures and the location of the information and cleanup supplies
· Materials and equipment necessary for spill cleanup will be kept in a material storage area (to be designated
by the facility owner) on site. Equipment and material will include, but will not be limited to:
o shovels, wheel barrows, brooms, dustpans, mops, rags, gloves, kitty litter or Speedi-Dry, roll of
plastic, plastic trash bags, and one metal trash container specifically designated for spill cleanup
purposes.
o A covered weatherproof container shall be maintained at the facility. This box shall contain a
handled spade shovel, a handled square shovel, filled sand bags and loose sand. There shall be
enough sand bags (approximately 6 bags measuring approximately 1 ft. x 2 ft.) to span the drainage
curb opening in the event of a spill. The sand bags shall be placed on the upstream side of the
Site Operation and Maintenance Plan Multi-Family Housing Project
August 25, 2023 900 Old Stage Road, Centerville, MA
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curb opening entirely blocking the opening to prevent any release of spilled material traveling
through the curb opening and into the drainage systems. Loose sand will be placed around the
bags as needed to create complete damming of the opening. Once the spill is cleaned up, the
loose sand and sand bags should be disposed of properly if contaminated. If not contaminated,
they shall be placed back in the weatherproof container and the materials shall be replenished as
needed.
· All spills will be removed immediately after discovery.
· The spill area will be kept well ventilated, and personnel will wear protective clothing when necessary per
manufacturer’s recommendations, cautions, and common sense practice, to prevent injury from contact
with a hazardous substance.
· Depending on the nature of the spill, it will be reported to the Authorities as necessary (see Response and
Notification section below).
SPILL RESPONSE & NOTIFICATION
Assessment – Initial Condition
The facility maintenance manager will assess the incident and initiate containment control measures with the
appropriate spill containment included in the spill kit kept on site.
Initial Notification
In the event of a spill, the facility maintenance manager will be notified immediately. If there is any release of or
contamination by a hazardous material immediate notification of the local Fire Department and Health Department
is required.
Further Notification If Required
Based on the assessment from the fire chief, additional notification to a cleanup contractor may be made. The
Massachusetts Department of Environmental Protection may be notified depending upon the nature and severity
of the spill. The Fire Chief will be responsible for determining the level of cleanup and notification required.
Spills of toxic or hazardous material in excess of reportable quantities, as established in the Massachusetts
Contingency Plan (MCO) will be reported to the Massachusetts Department of Environmental Protection Emergency
Response Line at (888) 304-1133.
Site Operation and Maintenance Plan Multi-Family Housing Project
August 25, 2023 900 Old Stage Road, Centerville, MA
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EDUCATIONAL PROGRAM
The facility maintenance manager will provide educational information and training for all maintenance personnel.
The information and training will review the information contained in the O&M Plan at a minimum, as well as other
procedures and practices the facility owner requires to be implemented. The training shall review O&M procedures,
required schedules, necessary inspection logs, and where response materials are kept.
All new maintenance employees shall receive this information and training. The training shall be reviewed with
maintenance personnel annually.
Site Operation and Maintenance Plan Multi-Family Housing Project
August 25, 2023 900 Old Stage Road, Centerville, MA
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ATTACHMENT A – INSPECTION LOG
O:\2021\2021-040\ADMIN\REPORTS\SWM\2021-040 SMW O and M.docx
Inspection Item Inspection Frequency Date Inspected Weather at Time Minimum Maintenance Cleaning or Date of Cleaning Repair Recommendations/of Inspection- Note & Key Items to Check Repair needed Cleaning/ Performed by: Corrective Actionsof Weather Conds. (list Items) RepairSince Last Inspect.Curb OpeningsCatch BasinsSediment ForebaysRiprap and StoneVegetated SwalesRoof drains/leadersErosion and StabilizationVegetation - survival/healthMowing/trimming of SWM areasStreet/ Parking Lot Sweeping In the Event of a Spill refer to the spill response procedure and contact appropriate agencies. Describe any Corrective action required at this time (attached figures to show location of concern):Inspector: Title: Date:Attachment A - SMS INSPECTION FORM900 Old Stage Road, Centerville, MA