310039_Application Attachment_20200110

Smfthfield
600A food. 1;?J2p0KsN8'
PO Box 856
Warsaw, NC 28398
January 2, 2020
Ms. Christine Lawson
Water Quality Permitting Section
Animal Feeding Operations Program
1636 Mail Service Center
Raleigh, NC 27699-1636
Re: Benson Farm (31-039) Site Plan ADDENDUM
Dear Ms. Lawson:
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Re9�or►�t ®per 1 cis �r`�'.�1
Smithfield Hog Production had previously submitted a Swine Digester Application for the Benson Farm.
Due to an oversight (2) documents were missing. They are listed below and included via attachment.
The following items are included in this package:
• NUP Certification signature page
• O&M Plan
Thank you for taking the time to review this project. Please contact me at [phone] or
[e-mail] if you have any questions or need additional information.
Sincerely,
_'-�Jcc bJA_az2__
Kendal Williams
Project Engineer

NUTRIENT UTILIZATION PLAN CERTIFICATION
Name of Farm: Benson Farm; AWS310039
Owner: Murphy -Brown, LLC dba smithfield Hog Production
Manager:
Owner/Manager Agreement:
Itwe understand and will follow and implement the specifications and the operation and
maintenance procedures established in the approved animal waste nutrient management
plan for the farm named above. I/we know that any expansion to the existing design capacity
of the waste treatment and/or storage system, or construction of new facilities, will require a
new nutrient management plan and a new certification to be submitted to DWR before the new
animals are stocked.
Itwe understand that I must own or have access to equipment, primarily irrigation equipment,
to land apply the animal waste described in this nutrient management plan. This equipment
must be available at the appropriate pumping time such that no discharge occurs from the lagoon
in the event of a 25 year 24 hour storm. I also certify that the waste will be applied on the land
according to this plan at the appropriate times and at rates which produce no runoff.
This plan will be filed on site at the farm office and at the office of the local Soil and Water
Conservation District and will be available for review by NCDWR upon request.
Name of Facility Owner: Murphy -Brown, LLC dba smithfield Hoc) Production
Signature: 'o - ?_z - 1 `l
Date
Name of Manager (if different from owner):
Signature:
Date
Name of Technical Specialist: Toni W. King
Affiliation: _ Smithfield Hog Production Division
Address: 2822 Hwy 24 West, PO Drawer 856
Warsaw, NC 28398
Telephone: [phone]
Signature:
Date
8of11

Anaerobic Digester System O&M
Table of Contents
I. Definitions.............................................................................................................................................2
11. Introduction...........................................................................................................................................3
III. Description of the Operational Components....................................................................................3
1) Gravity Collection Pipe..................................................................................................................4
2) Influent Pump Station (where necessary).....................................................................................4
3) Anaerobic digester........................................................................................................................5
4) Mixing Pump Station.....................................................................................................................6
5) Effluent Pump Station (where necessary).....................................................................................6
6) Storage Basin.................................................................................................................................7
7) Unison Conditioning System.........................................................................................................7
8) Flare...............................................................................................................................................8
9) Transfer Pump...............................................................................................................................8
10) Stormwater Removal Pump......................................................................................................8
IV Description of Anticipated Maintenance..........................................................................................9
A. Routine System Maintenance Instructions.......................................................................................9
B. Troubleshooting................................................................................................................................9
C. Emergency Protocols, Repair, and Replacement............................................................................10
D. Warranty Information.....................................................................................................................10
1) Farm Site......................................................................................................................................10
V. Provisions for Safety Measures...........................................................................................................11
VI. Spill Prevention and Control Provisions..........................................................................................11
Appendix A: Contact Information.............................................................................................................12
Appendix B: Farm Operations and Maintenance Checklist......................................................................14
Anaerobic Digester System O&M Page 1 of 15

Definitions
Anaerobic Digestion - A method of wastewater treatment that utilizes the natural
decomposition of the waste by bacteria in the absence of oxygen to produce gases commonly
referred to as biogas.
Anaerobic Digester - A basin or tank that holds the wastewater for anaerobic digestion.
Biogas - Produced by anaerobic digestion, and is typically comprised of approximately 55%
methane (the primary constituent of natural gas), with the remainder being mostly carbon
dioxide (CO2).
Tailgas - The "waste" or residual gas that is removed by the PSA system, which includes carbon
dioxide (COA and hydrogen sulfide (HzS).
Anaerobic Digester System 0&M Page 2 of 15

II. Introduction
The proposed swine manure biogas project uses anaerobic digestion of hog barn waste to
produce biogas (consisting of approximately 65% methane, which is the primary constituent of
natural gas) which is collected, conditioned, and ultimately injected into the utility's natural gas
pipeline. Each hog farm site includes influent collection piping from the hog barns, an anaerobic
digester or covered lagoon, a digester mixing system, a biogas conditioning system to remove
moisture, a back-up flare unit, and a biogas transfer pipe leading to the Gas Upgrading System
(GUS).
The anaerobic digesters at each farm site include an HDPE membrane cover to capture the
biogas generated by the anaerobic digestion process. The anaerobic digester is partially mixed
by pumping, and provides sufficient detention time to effectively reduce the volatile suspended
solids in the raw waste by anaerobic digestion. The reduction of volatile solids through
microbial processes produces an energy -rich biogas, which is a valuable commodity.
There are two (2) types of solids found in liquid waste: organic and inorganic. The inorganic
solids are "non -treatable," but they are normally present in such small quantities that they are
considered insignificant in the treatment process. However, excessive quantities of sand, grit,
clay, etc. can cause the need to pump out the lagoons more often.
The organic solids will break down and decompose by biochemical reduction. The bacteria that
is grown and maintained in the system are harmless anaerobic and aerobic bacteria. Bound
oxygen can be found in nitrates, a compound that results from the aeration process. These
same bacteria are provided by nature and are found in streams, lakes, and in the soil to destroy
dead plants and animals. The difference is that in the treatment process, man has provided an
ideal environment for a concentration of these bacteria to feed and grow; thus, the biological
action is greatly accelerated. Raw wastes are the food for the bacteria in the system. The
anaerobic digester contains certain populations of bacteria that do not require the presence of
oxygen.
In addition to the information covered by this manual, the system operator should become
familiar with the characteristics of the wastewater being treated and with local, state, and
federal laws which may apply to the operation of the system.
Design Flow - The waste collection system, influent pump station (where necessary), and
anaerobic digester systems have been designed to handle the Average Daily Flow Rate (ADF) of
the farms in which they are connected, including the manure and wastes generated by the
animals, flushing liquids, and other wastes typical of confined swine animal housing. All
treatment units were designed for the Design Flow for continuous, seven (7) days per week
operation.
III. Description of the Operational Components
Below are listed the major component operations.
Anaerobic Digester System 0&M Page 3 of 15

1) Gravity Collection Pipe
The gravity collection pipe receives the flushed waste from the hog barns and directs
that waste to the influent pump station (or mixing pump station, where applicable).
During normal operation, the pipe should be free -flowing, with no clogs present, in
order to transport waste to the influent pump station. The gravity collection pipe
includes a series of clean -outs that provide access to the gravity collection pipe for
removal of a clog or blockage via use of a sewer snake or similar apparatus should the
need arise.
Sending flushed waste from the hog barns to the gravity collection pipe is the farmer's
responsibility. The operator of the biogas system should periodically check each hog
barn waste outlet to ensure that there are no overflows, clogs, etc. The influent pump
station includes an analog run-time meter for each pump, which can be monitored by
the operator to ensure the pumps are operating for sufficient times to indicate proper
flushing by the farm owner.
2) Influent Pump Station (where necessary)
The influent pump station receives waste from the gravity collection pipe and pumps
that waste to the anaerobic digester via buried forced main. The waste enters the
digester at the opposite end of the digester outlet (so "new" waste must flow through
the curtain baffle system of the digester, resulting in effective treatment of the waste).
During normal operation, the pump station will run based on the liquid level in the wet
well, which is triggered by 4 floats.
The lowest float is the "pump off" float, and is set at approximately 12" above the
bottom of the wet well. The pump station should not run if the liquid level is below this
float.
The 2"d lowest float is the "lead pump on" float, and is set at an elevation approximately
2" below the inlet pipe invert, and above the "lead pump off" float. When the liquid
level is above this float, only one pump will run at any given time, where the pumps will
alternate between cycles (Pump 1 will run while Pump 2 is off, and in the next cycle
Pump 2 will run while Pump 1 is off, and so on).
The 3' lowest float is the "lag pump on" float, and is set approximately 6" above the
"lead pump on" float. If the liquid level fills above this float, then both pumps will run
until the "pump off" float is disengaged.
The 4th and highest float is the "high level alarm" float. When the liquid level is above
this float, an audible and visual alarm is triggered to alert the operator via telemetry
system that there is a problem that has prevented pump operation.
The pipe from each of the two pumps goes through a check valve (which only allows the
liquid to travel in one direction) and a plug valve (normally open, but can be closed
Anaerobic Digester System 0&M Page 4 of 15

when needed, such as when servicing the upstream pump). The two pipes join together
by a tee, and the downstream pipe leads to the inlet of the digester.
During normal operation, the pumps may run several times an hour to pump waste to
the anaerobic digester. Only one pump will run at any given time, normally, where the
pumps will alternate between cycles (Pump 1 will run while Pump 2 is off, and in the
next cycle Pump 2 will run while Pump 1 is off, and so on). It is not uncommon,
however, for both pumps to operate during higher inlet flows.
The pumps can also be controlled manually, if desired, or in times of troubleshooting,
etc. The control panel next to the pump station includes toggle switches for each pump,
which can be set to either (1) Auto (for normal float -based operation), (2) Off, or (3)
"Hand" (i.e., manual operation).
The alternating of pumps can also be changed within the control panel, where a toggle
switch allows the operator to choose "Lock 1", "Alternate", or "Lock 2". During norma
operation, the toggle switch will remain at "Alternate" in order to alternate the pumps
between pumping cycles, but the operator can choose to lock the use of Pump #1 or
lock the use of Pump #2 if needed.
In the event of a pipe clog or pump failure, the waste will flow through the gravity
"digester bypass" pipe connecting the interior of the pump station to the existing lagoon
at an elevation below the top of the wet well, which will avoid overflow of the pump
station.
Note: Some farms do not have Influent Pump Stations; rather than using an Influent
Pump Station, the waste flows from the barns to the Mixing Pump Station or flows
directly into the digester via gravity.
3) Anaerobic digester
The anaerobic digester receives all raw wastes from the hog barns. The complex organic
wastes are broken down to simpler compounds by the anaerobic digestion process. As
a part of the anaerobic process, bio gases (including methane, carbon dioxide, and
hydrogen sulfide) are produced. These gases are captured by an impermeable cover
and then directed to the Unison conditioning system. The gases are collected in
perforated piping underneath the cover, which are connected to a main pipe that
connects to the conditioning system. The wastes are held for about 45 days to allow the
biological process to complete. The sludge that settles at the bottom of the digester is
periodically removed by connecting portable pipes and pumps to the sludge removal
pipes in the digester, and disposed of by permitted means on the farm or by a contract
sludge hauler.
During normal operation, the digester cover will likely be "inflated" like a balloon due to
the biogas that's trapped beneath. The cover should be free of excessive accumulation
of rainwater, and should not show signs of any damage or leaks. The presence of foul
odor, a strong wastewater smell, or "dirty" water on the cover may indicate that there is
a leak. If such odors or dirty water are observed, the operator should carefully inspect
Anaerobic Digester System O&M Page 5 of 15

the cover for leaks, and take action to repair the cover temporarily with adhesive tape.
Temporary repairs should be followed with a permanent repair or patch as soon as
possible.
4) Mixing Pump Station
The mixing pump station slowly mixes the waste that has been collected in the
anaerobic digester, which provides for more efficient methane production than would
be achievable without any mixing.
During normal operation, the pumps will run at the same time for several hours per day
to mix the waste in the anaerobic digester. A common schedule for the pumps would
be 6 hours on, then 6 hours off, and so on.
The pumps can also be controlled manually, if desired, or in times of troubleshooting,
etc. The control panel next to the pump station includes toggle switches for each pump,
which can be set to either (1) Auto (for normal operation), (2) Off, or (3) "Hand" (i.e.,
manual operation).
5) Effluent Pump Station (where necessary)
The effluent pump station receives waste from the anaerobic digester and pumps that
waste to the lagoon via buried force main. The waste enters the effluent pump station
at the opposite end of the digester inlet (so "new" waste must flow through the curtain
baffle system of the digester, resulting in effective treatment of the waste).
During normal operation, the pump station will run based on the liquid level in the wet
well, which is triggered by 4 floats.
The lowest float is the "pump off" float, and is set at approximately 12" above the
bottom of the wet well. The pump station should not run if the liquid level is below this
float.
The 2"d lowest float is the "lead pump on" float, and is set at an elevation approximately
2" below the inlet pipe invert, and above the "lead pump off" float. When the liquid
level is above this float, only one pump will run at any given time, where the pumps will
alternate between cycles (Pump 1 will run while Pump 2 is off, and in the next cycle
Pump 2 will run while Pump 1 is off, and so on).
The 3' lowest float is the "lag pump on" float, and is set approximately 6" above the
"lead pump on" float. If the liquid level fills above this float, then both pumps will run
until the "pump off" float is disengaged.
The 4th and highest float is the "high level alarm" float. When the liquid level is above
this float, an audible and visual alarm is triggered to alert the operator via telemetry
system that there is a problem that has prevented pump operation.
Anaerobic Digester System O&M Page 6 of 15

The pipe from each of the two pumps goes through a check valve (which only allows the
liquid to travel in one direction) and a plug valve (normally open, but can be closed
when needed, such as when servicing the upstream pump). The two pipes join together
by a tee, and the downstream pipe leads to the inlet of the digester.
During normal operation, the pumps may run several times an hour to pump waste to
the lagoon. Only one pump will run at any given time, normally, where the pumps will
alternate between cycles (Pump 1 will run while Pump 2 is off, and in the next cycle
Pump 2 will run while Pump 1 is off, and so on). It is not uncommon, however, for both
pumps to operate during higher inlet flows.
The pumps can also be controlled manually, if desired, or in times of troubleshooting,
etc. The control panel next to the pump station includes toggle switches for each pump,
which can be set to either (1) Auto (for normal float -based operation), (2) Off, or (3)
"Hand" (i.e., manual operation).
The alternating of pumps can also be changed within the control panel, where a toggle
switch allows the operator to choose "Lock 1", "Alternate", or "Lock 2". During norma
operation, the toggle switch will remain at "Alternate" in order to alternate the pumps
between pumping cycles, but the operator can choose to lock the use of Pump #1 or
lock the use of Pump #2 if needed.
The gravity outlet of the anaerobic digester leads to the inlet of the effluent pump
station, and the invert is set at the freeboard of the digester so that the digester
maintains a constant level
Note: Some farms do not have Effluent Pump Stations; rather than using an Effluent
Pump Station, the waste gravity flows from the anaerobic digester to the lagoon.
6) Storage Basin
The effluent of the anaerobic digester flows from the anaerobic digester outlet pipe to
the storage basin. The storage basin is used to store the treated effluent subsequent to
anaerobic digestion. The individual farm owners are responsible for the operation and
maintenance of the storage basins. However, as this is a critical part of the integrated
system, the Operator should note any abnormal operation of the storage basin, such as
leaks or excessive liquid level, and communicate such observations to the farm owner.
During normal operation, the storage basin will most often appear to be inactive. Waste
will periodically flow from the anaerobic digester outlet pipe into the storage basin via
gravity.
7) Biogas Conditioning System
The Biogas conditioning system receives biogas from the anaerobic digester and
removes moisture from the biogas by means of compression and heat exchangers.
Anaerobic Digester System O&M Page 7 of 15

This system will be managed by a 3d party, but the information is included in this O&M
for reference.
The biogas from the anaerobic digester is commonly at 100% relative humidity; the
biogas is purported to be near 6% relative humidity after going through the conditioning
system.
During normal operation, the conditioning system should run without any need for
input from the system operator. Audible and visual alarms will indicate issues with the
system. The discharge pressure and flow rate can be manipulated by the operator
through adjustment of the pressure regulator on the bypass line and through
adjustment of the variable frequency drive. The automatic shutoff feature, whereby the
operator can set the vacuum pressure shutoff point. As the Unison skid approaches this
setpoint, it will automatically reduce compressor speed to seek a flowrate that matches
the biogas production. If the vacuum pressure exceeds the setpoint, the Unison skid will
shutdown and trigger an alarm to the operator via telemetry system.
8) Flare
During normal operation, the flare located at each farm should not be necessary. In
times of need, such as catastrophic failure of the biogas conveyance pipeline, the flare
may need to be operated to consume excess accumulated biogas from the digester.
The flare is not an automated system, and the Operator must articulate the biogas
piping control valving to direct biogas from the digester to the flare, and ignite the flare.
Care must be taken by the Operator in igniting the flare, as biogas is highly flammable.
Each flare also has a condensate trap manhole. Contained inside is a small PVC drain
pipe and PVC drain valve. The PVC drain valve should remain closed at all times unless
the Operator is removing condensate. Should the valve be left open, biogas will escape
from the piping. Periodically, and at a frequency determined appropriate by the
Operator, these condensate traps will be opened momentarily to drain and remove any
condensate collected in the piping. It is recommended that the condensate drain valve
only be opened when the biogas piping is pressurized, as should the valve be opened
under no pressure, ambient air may enter the biogas piping and challenge biogas
upgrading by the GUS.
9) Transfer Pump
The transfer pump transfers accumulated effluent among available storage basins as the
farm owner deems necessary to optimize effluent storage. The transfer pumps are
simple and manually operated through use of a local disconnect. Under normal
circumstances, the transfer pump will only be used periodically and infrequently by the
farm owner.
10) Stormwater Removal Pump
A stormwater removal pump is kept at each digester site in order to remove
accumulated rainwater from the top of the basin cover. The pump can be powered by
Anaerobic Digester System O&M Page 8 of 15

any standard 120v outlet that's available nearby, such as the accessory outlet installed
adjacent to the digester mixing pump station. The pump should be placed in a low spot
on top of the cover, and the pump outlet should lead to an appropriate area for
stormwater discharge (on some sites, pipes have been placed to easily receive the pump
outlet pipe, which leads to the natural stormwater drainage swales on the property).
IV. Description of Anticipated Maintenance
Once the system has been started up and is operating efficiently, very little maintenance will be
required. Simple tests should be periodically performed to evaluate the performance of the
wastewater treatment components, and the system components visually inspected daily.
A well -operated, properly adjusted, system will exhibit the following visible signs of proper
maintenance:
• All pipes should be intact and watertight.
• The pumps should be nearly silent with little to no vibration.
• The anaerobic digester should be free of excessive accumulation of rainwater.
• Accumulated rainwater may be removed with a portable sump pump. The pumped water
may be discharged safely on adjacent vegetated areas, or used for a more beneficial
purpose as permitted.
• The anaerobic digester cover should be free of any tears, punctures, or failures.
• There should be no strong odors coming from the digester or flare.
• The storage basin should be clean and free of floating debris. The liquid should be clean and
clear.
A. Routine System Maintenance Instructions
For optimum system operation and maximum treatment efficiency, daily maintenance is
necessary. In addition to the daily maintenance, all mechanical equipment should be
cleaned weekly and lubricated as often as needed.
See Appendix B of this document for an operations and maintenance checklist (daily,
monthly, quarterly, semi-annually, annually).
B. Troubleshooting
Refer to equipment O&M manuals as necessary, summarized below:
1. Influent Pump Station
2. Mixing Pump Station:
3. Effluent Pump Station
4. Unison Conditioning System
5. Transfer Pump:
4" Hog Manure Pump or 4" High Pressure Pump
(Electric Pumps)
8" Flush Pump (Electric Pump)
4" Hog Manure Pump or 4" High Pressure Pump
(Electric Pumps)
N/A
3" Pump (Electric Pumps)
Anaerobic Digester System O&M Page 9 of 15

See Appendix A for contact information for each system component.
C. Emergency Protocols, Repair, and Replacement
The O&M Manual kept onsite in the farm office building (or wherever farm records are kept
for each farm) provides step-by-step instructions for field repair or securing the piece of
equipment until qualified repair personnel arrive.
This Manual contains emergency contact numbers for the repair or replacement of the
supplied equipment in Appendix A.
D. Warranty Information
1) Farm Site
(1) Influent Pump Station: "GEA Farm Technologies... warrants to the original buyer and
end user... that the parts of all equipment sold under the Company trademark are free
from defects in material or workmanship for a period of twelve (12) months from the
date of delivery of the equipment to the Purchaser... Any equipment used for commercial
usage, commercial lease on one or more farms is warranted for a reduced period of
thirty (30) days only."
(2) Anaerobic Digester Liner and/or Cover:
Workmanship: "Plastic Fusion Fabricators, Inc. hereby warrants that the linings
installed by Plastic Fusion Fabricators, inc. under this warranty shall be installed
free from defects in Plastic Fusion Fabricators' workmanship. The warranty set
forth in the preceding sentence (the "Workmanship Warranty") shall commence
upon acceptance of the work and shall expire on the last day of a period of 1
year from said date..."
Material: "AGRU AMERICA, Inc. (AGRU) warrants its material for a period of
FiVE(5) Years, prorated, from the final project ship date when subsequently
properly installed..."
(3) Mixing Pump Station: "GEA Farm Technologies... warrants to the original buyer and end
user... that the parts of all equipment sold under the Company trademark are free from
defects in material or workmanship for a period of twelve (12) months from the date of
delivery of the equipment to the Purchaser... Any equipment used for commercial usage,
commercial lease on one or more farms is warranted for a reduced period of thirty (30)
days only."
(4) Effluent Pump Station: "GEA Farm Technologies... warrants to the original buyer and
end user... that the parts of all equipment sold under the Company trademark are free
from defects in material or workmanship for a period of twelve (12) months from the
date of delivery of the equipment to the Purchaser... Any equipment used for commercial
usage, commercial lease on one or more farms is warranted for a reduced period of
thirty (30) days only."
(5) Biogas Conditioning System (managed by 311 party)
(a) Biogas skid: "This warranty is valid for 30 months from the time the equipment is
shipped from Unison's factory or 24 months from the date of startup, whichever
occurs first."
(b) Biogas Blower / Compressor:
"The goods will be free of defects in material and workmanship for a period of twelv
Anaerobic Digester System 0&M Page 10 of 15

e (12) months from the date the goods are placed in use by the buyer or eighteen (18
) months from the date of shipment, whichever shall occur first."
(c) Chiller: "24 months from startup, not to exceed 30 months from shipping."
(6) Transfer Pump: "GEA Farm Technologies... warrants to the original buyer and end user...
that the parts of all equipment sold under the Company trademark are free from defects
in material or workmanship for a period of twelve (12) months from the date of delivery
of the equipment to the Purchaser... Any equipment used for commercial usage, .
commercial lease on one or more farms is warranted for a reduced period of thirty (30)
days only."
V. Provisions for Safety Measures
A. Restriction of Access: No persons should enter any portion of the wastewater treatment system
unless performing a repair or routine maintenance, and only then if accompanied by another
person capable of performing life-saving activities should the need arise.
B. Emergency Contacts: Information shall be posted at the gate and in the control room. (There
will be no harmful chemicals used for the anaerobic digestion system).
C. All equipment safety guards, warning labels, safeties, and warning alarms shall be kept in place
and operational at all times.
D. Keep and maintain all clearances as recommended by equipment manufacturers and as required
by law.
E. Keep all open flames and sources of combustion away from gas accumulations. Do not smoke
near the gas collection, conveyance, or combustion components.
VI. Spill Prevention and Control Provisions
A. Response to Upsets and Bypasses Including Control Containment and Remediation: Audible
alarms will be provided at all controls stations. The Control System will provide remote alarms
to alert operator of a problem should one occur.
B. Contact Information for Operational Personnel, Emergency Responders, and Regulatory
Agencies: Phone numbers for Emergency Responders and Remediation Agency numbers will be
located by the computers and control systems in the control room.
C. Facility Control Valves will allow operator to isolate Systems if a problem occurs.
Anaerobic Digester System O&M Page 11 of 15

Appendix A: Contact Information
Project Management and Equipment Service Providers:
Influent Pump Station
Lee Brock
Brock Equipment Company
[e-mail]
[phone]
Anaerobic Digester Cover
Plastic Fusion Fabricators, Inc.
Larry Hice
[phone]
Mixing Pump Station
Lee Brock
Brock Equipment Company
lee@ brockeguipment.com
[phone]
and/or
Unison Solutions, Inc.
Don Weeden
Cell: [phone]
Office: [phone]
don.weeden[u unisonsolutions.com
Transfer Pump
Lee Brock
Brock Equipment Company
lee@ brockeguipment.com
[phone]
Flare
ProPump & Controls Inc.
Jeff McGuire
Work: [phone]
Cell: [phone]
[e-mail]
Mechanical Installation & Controls ProPump & Controls Inc.
Jeff McGuire
Work: [phone]
Cell: [phone]
[e-mail]
Anaerobic Digester System O&M Page 12 of 15

Regulatory and other Agencies:
-Location Phone
Christine Blanton DWQ, AFO Permitting Raleigh, NC [phone]
Lawson and Compliance
Anaerobic Digester System O&M Page 13 of 15

Appendix B: Farm Operations and Maintenance
Checklist
Operator Present:
Time/Date:
Farm System Checklist: Mark Yes/✓ or No/X as applicable, fill in blanks where specified
Manure Collection / Feedstock System
Perform visual appraisal of waste collection system.
Any visible signs of overflow or malfunctioning?
Check influent pump stations. Any Alarms?
Put each influent pump in "Hand". Operating
normally?
Any rattling or unusual noises from influent pumps?
Any observed leaks or spills from pipes, fittings, or
well?
Test the alarm. Functioning?
Excessive accumulation of solids or debris in well?
Agitation system in need of operation?
RECORD THE RUN HOURS FOR PUMP 1
RECORD THE RUN HOURS FOR PUMP 2
RECORD THE RUN HOURS FOR PUMP 3
RECORD THE RUN HOURS FOR PUMP 4
Digester System
Perform visual appraisal of digester (walk around).
Any visible signs of overflow or malfunctioning?
Does the cover appear to be leaking gas / odorous?
Any visible tears, rips, or holes observed in the cover?
>10% cover area under stormwater/rainwater?
Check mixing pump stations. Any Alarms?
Put each mixing pump in "Hand". Operating
normally?
(not necessary if mixing pumps running during visit)
Any rattling or unusual noises from mixing pumps?
Any observed leaks or spills from pipes, fittings, or
well?
Excessive accumulation of solids or debris in well?
Agitation system in need of operation?
RECORD THE RUN HOURS FOR PUMP 1
RECORD THE RUN HOURS FOR PUMP 2
RECORD THE RUN HOURS FOR PUMP 3
RECORD THE RUN HOURS FOR PUMP 4
Biogas Skid
Are there any alarms?
Are there any fluid leaks observed?
Check oil level —oil needed?
Anaerobic Digester System O&M Page 14 of 15

Excessive vibration of noise?
Are there any visible fluid leaks on skid or chiller?
RECORD THE RUN HOURS FOR GAS COMPRESSOR
Notes
Anaerobic Digester System O&M Page 15 of 15