NCS000408_13_Graham O&M Plan 2019 Final Revised_20210917

CITY OF GRAHAM
Facilities
Operation and Maintenance Plan
Update
for
Reducing Stormwater Pollution Runoff from
Municipal Operations
Prepared by:
[-, F-
--- 0
alley, williams, carmen & king, inc.
engineers and architects
740 chapel hill road - post office box 1179
burlington, north carolina 27216-1179
Revised December 2019 (& 6/2020)
Project No. 10075

Table of Contents
1. Introduction.............................................................................................................. 1
2. Goals and Objectives............................................................................................... 1
3. Responsible Parties................................................................................................. 1
4. Facility Inspections...................................................................................................2
5. Site Assessments..................................................................................................... 3
5.1 Fire Department.............................................................................................. 3
5.2 Police Department...........................................................................................3
5.3 Water Treatment Plant.................................................................................... 4
5.4 Wastewater Treatment Plant........................................................................... 5
5.5 Recreational Facilities..................................................................................... 6
BillCook Park...................................................................................6
SouthGraham Park........................................................................6-7
Graham Regional Park...................................................................... 7
Graham Paddle Access......................................................................7
GrahamMarina................................................................................ 8
5.6 Public Works Facility.......................................................................8-9
5.7 Cemeteries...................................................................................10
Graham Memorial Cemetery Park.......................................................10
5.8 Graham Children's Museum..............................................................10
6. Facility Specific Best Management Practices......................................................... 10
6.1 Fire Department............................................................................................ 10
6.2 Recreational Facilities................................................................................... 11
6.3 Public Works Facilities.................................................................................. 11

7. General Best Management Practices..................................................................... 11
7.1 Vehicle and equipment storage..................................................................... 11
7.2 Waste Disposal............................................................................................. 11
7.3 Outdoor Material Storage.............................................................................. 11
7.4 Good Housekeeping Practices...................................................................... 12
8. Annual Inspection Program.................................................................................... 12
9. Employee Training................................................................................................. 12
10. Record Keeping................................................................................................... 122

Facilities Operation and Maintenance Plan
City of Graham
1. INTRODUCTION
This Operation and Maintenance (O&M) Plan has been developed with the goal
of preventing or reducing pollutant runoff from City of Graham owned facilities
and operations. It has been developed as required under Section G of the State
of North Carolina's Pollutant Discharge Elimination System Stormwater
Discharge Permit No. NCS000408, issued to the City effective July 1, 2005 and
by the City's Stormwater Management Program.
This O&M Plan is an update from the original dated August, 2007(revised on
December 2019 and June 2020 delays of assessment was caused by visitation
restrictions due to Covid 19 restrictions) and describes the City owned facilities
and their operations, identifies potential sources of stormwater pollution at the
facilities, recommends appropriate best management practices (BMPs) or
pollution control measures to reduce the potential of discharge of pollutants in
stormwater runoff, and provides for periodic review of this O&M Plan.
2. GOALS AND OBJECTIVES
The primary goal of the stormwater permit program is to improve the quality of
surface waters by preventing or reducing stormwater pollution from City owned
facilities and operations. Specifically, this Plan will be in place to reduce or
eliminate stormwater exposure of oil and grease, pesticides, herbicides,
fertilizers, sediment, and other materials used by the City.
3. RESPONSIBLE PARTIES
The Operation and Maintenance Plan Coordinator for these facilities is
designated as the City Planner, currently Mr. Nathan Page.
Responsibilities:
• Maintains materials, inventories, and handling and storage practices.
Inspection and maintenance of best management practices.
Plans and schedules education -training programs.
• Annual site inspections and assessments.
• Coordinates clean up of spills and releases.
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Facilities Operation and Maintenance Plan
City of Graham
4. FACILITY INSPECTIONS
Each facility was inspected and evaluated with respect to their potential for
generating polluted stormwater runoff. The City owns and operates the following
facilities:
Name of Facility
Address
Date of
Inspection
Fire Department
201 South Main St.
11/20/19
City Hall
201 South Main St.
11/20/19
Library
201 South Main St.
11/20/19
Police
216 Maple St.
11/20/19
Public Works
105 West Parker St.
11/20/19
Wastewater Plant
1204 E. Gilbreath St.
6/26/20
South Graham Park
1600 Rogers Rd.
11/20/19
Graham Recreation Center
311 College St.
6/30/20
Maple St. Center for Performing Arts
306 Maple St.
11/26/19
Concession Stand Apollo Field
401 Goley St.
11/20/19
Water Plant
1824 US 70
Mebane, NC 27302
6/26/20
Graham / Mebane Lake Marina
3218 Bason Rd.
Mebane, NC 27302
6/30/20
Bill Cooke Park and Dog Park
1010 Townbranch Rd.
11/20/19
Linwood Cemetery
East Pine St.
11/26/19
Graham Memorial Park
Cooper Rd.
12/2/19
Graham Regional Park
1575 N. Jim Minor Rd. Haw River
12/2/19
Graham Water Tower
391 E. Mc Aden Street
11/20/19
Children's Museum
217 S. Main Street
11/26/19
Arts Council
213 S. Main Street
11/26/19
Graham Museum
135 W. Elm Street
6/30/20
Graham Paddle Access
Hwy 54 and Haw River
11/20/19
Municipal Parking Lots
Various Locations
11/26/19
7 Pump Stations
Various Locations
11/20/19
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Facilities Operation and Maintenance Plan
City of Graham
5. SITE ASSESSMENTS
Of the City -owned sites inspected, those that were determined to have the
potential for generating polluted stormwater runoff are discussed below. A
description of the operations and the inspection results for each facility are also
presented. The site locations are shown on Figure 1.
5.1 Fire Department
• 2008 Site Assessments:
Equipment washing has continued in the parking lot behind the Fire
Department. No oil leaks were noted during this inspection but the floor
drain is still connected to the stormwater drainage system. All chemicals
and detergents appeared to be put up in their proper place.
• 2017 Site Assessment:
Equipment washing continues in the parking lot behind the Fire
Department. Mops and wash buckets were propped up outside of the bays
on the back side of the Fire Station.
• 2019 Site Assessment
Equipment washing continues in the parking lot behind the Fire
Department. Mops and wash buckets were propped up outside of the bays
on the back side of the Fire Station. Other chemicals appear to be in their
proper place
5.2 Police Department
2008 Site Assessments:
Only one gas can was found behind the building under the carport. All
other chemicals have been removed.
• 2017 Site Assessment:
Everything looks good, there is some evidence vehicles get washed under
the car port at the back of the station.
• 2019 Site Assessment
Two gas cans were found on sidewalk behind the building under the
carport and buckets, brushes and hoses to wash vehicles were present.
Maintain proper storage of these items when not in use.
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Facilities Operation and Maintenance Plan
City of Graham
5.3 Water Treatment Plant
Initial Site Assessment:
The Graham - Mebane Water Treatment Plant is owned jointly by the
cities of Graham and Mebane. The plant has recently been enlarged and
renovated. Much of the stormwater at this plant is now treated before
flowing off -site. Only one area was found to have the potential to pollute
the stormwater system. An old diesel fuel tank northwest of the treatment
plant between the plant and the lake appears to be leaking diesel fuel. A
concrete levee containment system is in place around the fuel tank.
However, drainage from the tank's levee system does not appear to
undergo treatment of any kind.
2008 Site Assessments:
The old diesel fuel tank northwest of the treatment plant has been drained
and repaired and shows no signs of leaking. Reevaluation of the drain for
the levee containment system for the diesel fuel tank shows that the
system drains to the stormwater treatment system. Stormwater Pollution
potential is minimal
• 2017 Site Assessment:
Clean up from recent repairs is ongoing, with an open dumpster onsite, to
be removed when cleanup is finished. The potential for stormwater
pollution is minimal.
2020 Site Assessment
Site is being well maintained as shown in visit pictures of the site
(6/26/20). Outside Diesel and other liquid tanks are surrounded by
Concrete Levee Containment as noted in the Initial site assessment. They
appear to be in good shape. The potential for Stormwater pollution is
minimal.
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Facilities Operation and Maintenance Plan
City of Graham
5.4 Wastewater Treatment Plant
Initial Site Assessment:
The Graham Wastewater Treatment Plant is a biological treatment
facility, which on average treats 1.8 million gallons per day of both
domestic and industrial wastewater. A sludge loading area is located
on -site. This area has a grate inlet intended to catch any spilled or
washed materials and return them to the sanitary sewer system. There
is evidence of washing or spills not flowing to the grate inlet but moving
away from the intended area and flowing down an asphalt drive to a
curb inlet in the stormwater system. Another potential pollution area
was found at a grate inlet near the southeastern corner of the site. It
appears that this was a washout area. Oils and sediment were found in
and around the grate inlet.
• 2008 Site Assessments:
It was found that if trucks at the sludge loading area were backed up
and loaded further up the hill, any spills drain into the intended grate
inlet and none is lost into the stormwater system. No recent evidence
was found of any sludge entering the stormwater system. Also the grate
inlet near the southeastern corner of the site shows no signs of recent
equipment washing. Stormwater pollution potential is minimal.
• 2017 Site Assessment:
No changes from 2008, 2011 assessment, stormwater pollution is
minimal.
• 2020 Site Assessment
The Wastewater Treatment Plant site is being well maintained.
Currently construction is underway for an additional loading area to the
lower storage Building for Chemicals. To allow for better handling of
Storage tanks. (See Pictures taken on file for this inspection 6/26/20)
Bulk Chemical tanks are being stored outside on an Asphalt pad and
grassed areas. Safety of this needs to be accessed if a leak should
occur. Placement in a Concrete Levee Containment area or other
storage containment is recommended if this practice continues.
A Diesel Storage tank for the emergency generator is located outside
with no secondary containment. Review of safety needs to be accessed
of this and secondary containment needs to be considered.
Stormwater pollution from site is minimal unless a leak or spill occurs
on either of these sites.
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Facilities Operation and Maintenance Plan
City of Graham
5.5 Recreational Facilities
The City's Parks and Recreation Department owns and operates two parks,
two recreational centers, one athletic field, and jointly owns a lake with the city
of Mebane. All of the recreation facilities were inspected, and those with the
potential for polluting stormwater runoff are discussed below.
Bill Cook Park
• Initial Site Assessment:
Several empty drums are being stored behind the maintenance office.
Many of the drums are starting to rust and deteriorate.
2008 Site Assessments:
Several drums were still found behind the maintenance office. Also
mulch was dumped at the end of a parking lot next to a stream. The
mulch is temporary but poses a potential to be washed directly into the
stream.
• 2017 Site Assessment:
An area below the baseball fields needs to be stabilized, sediment is
washing through the parking lot and into a stormdrain. The parking lot
near the maintenance building has a pile of sand in it which shows
some evidence of washing, and has the potential to wash into the
ditch and culvert.
Maintenance Shop: Barrels are stacked up behind the maintenance
building along with miscellaneous equipment. The gated overhand
attached to the main building has miscellaneous buckets, sprayers,
and gas cans lined up against the outer fence, creating a potential for
stormwater pollution. Miscellaneous trash and recyclables are in bags,
buckets and spread throughout the site. All other equipment is under
locked shelters.
2019 Site Assessment
Overall Park looks good. An alternative to treating riprapped drainage
way through park with roundup to control vegetation needs to be
discussed. Fenced dog park addition seems to be managed and
performing well.
South Graham Park
• Initial Site Assessment:
Gas is housed in a small building on the eastern side of the park. The
building appears to be an old pump house and has a floor drain in the
northwestern corner of the building. The floor drain flows out the back
of the building and onto the ground. If gas is spilled inside the building,
it can flow outside and be washed into the stormwater system.
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Facilities Operation and Maintenance Plan
City of Graham
• 2008 Site Assessments:
Gas is no longer stored in the old pump house. Also a large amount of
crush and run was found in the parking lot near the volleyball pits. This
material being stored on the asphalt has the potential to be washed
into a nearby stormdrain.
• 2017 Site Assessment:
There are trashcans that do not have lids, but seem to be cleaned out
regularly. The walking path seems to be eroding around the culvert
allowing gravel and sediment into the ditch which leads to the
stormwater system.
• 2019 Site Assessment
Overall Park seems to be well maintained, some erosion of gravel
surface on walking track, general ongoing maintenance needed.
Graham Regional Park
Initial Site Assessment
Graham Regional Park was completed in 2017. The park includes
three playground areas for different ages, exercise equipment for
adults and a walking/biking track circling the park. In addition to this
there is a picnic shelter and bathrooms. A small area of the park
needs to be stabilized to reduce soil erosion. Stormwater pollution
potential is minimal at this location.
2019 Site Assessment
The Park continues to grow with a new road, parking lot addition and
shelter in 2019. Road side ditch vegetation needs to be monitored for
growth and reseeding in bare area. Large Stormwater detention pond
at the rear of the park needs maintenance of mowing and removal of
tree seedlings. Principal spillway riser needs to be monitored for
debris that can cause water backups.
Graham Paddle Access
• 2019 Site Assessment
The Graham Paddle Access is located on Cooper Road off Hwy 54 at
the Haw River. It consists of a ramp access to the Haw River, Gravel
Parking Area, Picnic gazebo and Seasonal bathroom facility for Public
usage. The sloping topography of the site would allow any trash or
spilled chemicals direct flow into the Haw River. Continue to monitor
and maintain trash pickup.
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Facilities Operation and Maintenance Plan
City of Graham
Graham Marina
• 2020 Site Assessment
The Graham Marina is located on Graham — Mebane Lake, a water
supply lake for Graham and Mebane. The Marina area consists of
parking lots, Boat ramps, fishing docks and the office. Currently the
site is well maintained. Main issues would be runoff of trash into
Water Supply Lake due to recreational visitors. Recommend to
constantly monitor trash cans and grounds for trash from visitors of
the site. Stormwater runoff from onsite chemicals is low.
5.6 Public Works Facility
The Public Works facilities consist of a main office building, a main shop building
in the center of the property, 3 open garages, a vehicle washing area, a fueling
station, storage bins for materials including sand, salt, and stone, and 2
dumpsters. Inside the fence for the public works station is also storage for
landscaping and public appearance workers. There is also a greenhouse,
maintenance building, and open garage used for landscaping. See Figure 2 for a
Public Works Site Map.
The City of Graham's Public Works Facility performs the following activities:
• Storage, maintenance, and repair of City owned trucks and equipment.
• Storage of miscellaneous materials used in the repair and maintenance of
the City's water and sewer systems.
• Fueling of City owned vehicles.
• Residential garbage collection.
• Street sweeping.
• Outdoor storage of gravel, construction debris, and dirt.
• Leaf collection and storage.
• Yard waste collection and storage.
All areas of the Public Works facilities were inspected, and those with the
potential for polluting stormwater runoff are discussed below.
Initial Site Assessment:
• Storage bins for materials were open with nothing preventing materials
from being washed away during heavy rain events.
• Chemical barrels were being stored in the open by the greenhouses.
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Facilities Operation and Maintenance Plan
City of Graham
• Excess water from greenhouses is picking up sediment and flowing to
the stormwater system.
• There was evidence of oil leaks from equipment flowing to storm
drains.
2008 Site Assessments:
• Chemical barrels and containers were being stored in the open
around the greenhouses.
An open bucket of oil/liquid asphalt was found outside the asphalt
storage bin.
There was evidence of oil leaks from equipment flowing to storm
drains.
2017 Site Assessment:
The main shop is very undersized for the materials storage and usage.
There is only one drain in the main shop, it is not within the main three
bays and it leads to the sanitary sewer. All chemicals, oils, and gasoline
need to be properly stored. The interior of the main shop does not pose an
immediate threat to stormwater pollution, however, there are
miscellaneous items stacked underneath the shelter and around the shop
which could cause issues. This includes, miscellaneous equipment, tires,
buckets, and metal.
Stormdrains are clearly marked and there are signs for no parking, and
washing clearly posted.
Most equipment is kept under sheds, there are some signs of oil leakage,
but the main shed has an asphalt berm to protect the stormdrain that sits
directly in front of it. Some garbage trucks and other equipment are kept
outside, there are some signs of oil leakage from these trucks.
Brine tank has a secondary containment unit that is more than sufficient
for the volume on hand.
Sand/salt mixture has appropriate erosion control measures in place, salt
erosion control measures are appropriate for now, but will need to be
replaced in the near future.
• 2019 Site Assessment
Area of the Public Works facility is well maintained. Drains are marked and
as found in the 2017 assessment equipment is kept under sheds.
Additional metal storage building was constructed for tires and supplies
near the garage building.
Empty oil and other containers near rear of Garage need to be stored or
discarded as soon as possible.
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Facilities Operation and Maintenance Plan
City of Graham
At buildings where possible water bars (speed bumps) and filter rolls are
placed to keep sediment or runoff from being released from covered areas
if a spill occurs.
5.7 Cemeteries
Graham Memorial Cemetery Park
2019 Site Assessment
Overall the site is well maintained. Work is needed in soil spoil area at the
park. Discarded soil from dug grave sites is placed in an open area below
dry soil storage building. No erosion control measures are in place and
sediment can runoff down the hill.
5.8 Graham Children's Museum
2019 Site Assessment
Grounds are well maintained. The parking lot at the site has 3 Contech
filterra Stormwater devices. These manage runoff from the parking lot
area. Annual Inspections and Maintenance need to be performed on these
devices to keep them functioning properly. General trash and leaves need
to be removed from water intake area. Also any sediment/ mulch from
parking lot and flower beds needs to be removed. Trees planted in the
devices need to be pruned as needed and replaced if damaged.
6. FACILITY SPECIFIC BEST MANAGEMENT PRACTICES
Stormwater management controls, or best management practices (BMPs), will be
implemented over the course of the following year to reduce the potential of
pollutants entering the stormwater that is discharged from City owned facilities.
The following lists the specific BMPs recommended for the City to employ to
minimize, to the maximum extent practical, the possibility of pollutant exposure to
stormwater for the areas identified above.
6.1 Fire Department
Investigate ways to treat the wastewater produced while washing fire
equipment. Possibilities may include (but are not limited to) installing a
treatment device downstream of the two grate inlets, installing a new wash
area that drains to the sanitary sewer, or washing the equipment
elsewhere.
• Install catch pans under fire trucks to catch leaking oil and reroute floor
drains to the sanitary sewer.
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Facilities Operation and Maintenance Plan
City of Graham
6.2 Recreational Facilities
• Remove and properly dispose of the empty drums.
• Pick up miscellaneous trash.
• Move sprayers, chemicals, and gas cans further under the shelter to
prevent rainwater from entering containers.
• Remove any stockpiled material as soon as possible or store in a manner
to prevent washing.
• Stabilize hillsides and bare areas to prevent erosion.
6.3 Public Works Facilities
• Properly handle and store all oil and chemicals.
• Clearly label spill kits and have them readily available for staff to use.
• Install catch pans under leaking equipment and properly dispose of leaked
fluids.
7. GENERAL BEST MANAGEMENT PRACTICES
The following general BMPs should be implemented to minimize the potential for
stormwater pollution from everyday operations at City owned facilities.
7.1 Vehicle and equipment storage
• Remove and dispose of all unused vehicles and equipment, if possible. If
vehicles and equipment are to be stored outside for longer than a month,
drain fluids. When practical, cover equipment and divert stormwater
around the equipment.
7.2 Waste Disposal
• All wastes (including solid waste, waste oil, empty drums) generated by
the City will be properly disposed of by the City or via outside contractors.
• Wastes will be stored in containers sealed from precipitation or stored
under cover or inside buildings.
7.3 Outdoor Material Storage
• Remove and dispose of all unnecessary materials, equipment, and debris.
• Store materials on pallets or elevated platform to prevent corrosion.
• Cover materials with tarps to minimize exposure.
• All empty containers stored outside will be tightly sealed and the outside
free of contamination.
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Facilities Operation and Maintenance Plan
City of Graham
7.4 Good Housekeeping Practices
• Work, storage, and vehicle parking areas are to be kept clean and orderly.
• Routine maintenance and cleaning of areas that are exposed (or have the
potential to be exposed) to stormwater runoff will be performed to
minimize stormwater pollution.
• Sweep or dry mop when cleaning outdoor areas. Avoid washing or hosing
down the area.
• Keep spill kits on -hand.
• Clean up spills promptly.
8. ANNUAL INSPECTION PROGRAM
Inspection forms for all facilities have been developed and inspections will be
conducted. The effectiveness of the BMP's implemented during the previous
year will also be evaluated annually. Based on the results of the inspections and
BMP evaluation, this Operation and Maintenance Plan will be updated and
modified to ensure the risk of stormwater pollution from City operations is
minimized.
9. EMPLOYEE TRAINING
An employee training program has been developed and implemented to educate
City employees about the requirements of this O&M Plan. This education
program includes background on components of the O&M Plan and hands-on
training in spill prevention and response, good housekeeping, proper material
handling, disposal and control of waste, washing, and inspection procedures. All
employees that apply fertilizers, herbicides and pesticides will continue to be
properly trained.
All new employees will be trained within one week of their start date.
Additionally, all employees will be required to participate in an annual refresher
training course. The training program will be reviewed annually by the SWPPT
and City Manager to determine its effectiveness and to make any necessary
changes to the program.
10. RECORD KEEPING
Inspection forms, training records, information on all BMP's implemented, and
any waste and/or recycling receipts shall be maintained on site for a minimum of
five years.
June 2020 Page 12 of 13

FIGURES