820038_Add-Info Response_20230726

July 26, 2023
Christine Lawson, Engineer
NCDEQ Division of Water Resources
Animal Feeding Operations
1636 Mail Service Center
Raleigh, NC 27699-1636
Subject: Response to Additional Information Request
Application No. ADS820038
Bull Run
Sampson County
Dear Mrs. Lawson,
CAVANAU G H
Stews, ship Through his,ovcmA_,
Cavanaugh & Associates, P.A., on behalf of Hd3 Farms of the Carolinas LLC has reviewed your Additional
Information Request, dated June 30, 2023, for the subject permit modification application for 'Bull Run',
which is noted to have been received by the Division on February 17, 2023; and has developed
responses and additional supporting information to address each item in your letter. For your
convenience, we have repeated the comments below in bold font, followed by the responses in
italicized font.
1. Mailing Address —The Mailing Address shown on the application differs from the Mailing
Address of Record for owner HD3 Farms of the Carolinas, LLC. Please confirm the correct
Mailing Address.
Response: Please note the correct mailing address is as follows:
PO Box 535
Elizabethtown, NC 28337-0535
2. Facility Name —The Facility Name shown on the application differs from the Facility Name of
Record for AWS820038. Please confirm the correct Facility Name.
Response: Please note the correct facility name is as follows:
Bull Run, as listed in the permitted facilities database.
3. Freeboard — NC NRCS Standard 366 —Anaerobic Digester requires a minimum of 2 feet of
freeboard in the covered digester. Please provide clarification that the digester will meet
minimum freeboard requirements.
Response: Per the NRCS 366 Anerobic Digester standard, rainfall is included in determining
the operational volume of the digester. The NOAA Atlas 14 30yr normal rainfall
data for the area has been used to determine the 25-year, 24-hour rainfall on the
digester. With this data, the operational volume for the digester design at this
site is based on 12-inches of structural freeboard plus 7.5 inches for the 25-year,
24-hour rainfall event to determine the 20.28 inches of freeboard for the
digester.

The previously provided volume calculations were based on a rainfall event of
7.0 inches, that value has been updated to 7.5 inches in the attached
calculations, and the other sheets that are affected by the change are included
as well.
4. Stormwater Outlet— Please provide atypical detail, including dimensions, for outlet for
stormwater removed from digester covers. Please also indicate stormwater outlet location.
Response: Please see attached plan sheets showing the location of the proposed
stormwater outlet (site plan sheet C.2.4.1), and typical detail (detail sheet C.3.8).
It should be noted that the design low point in the lagoon cover will be
determined by the cover supplier/installer, and provided to the permittee as a
submittal drawing prior to installation; therefore, the specific location depicted
on the attached site plan may change, and if so, such change will be reflected in
the record drawings upon completion of construction.
S. Biogas Use as a Renewable Energy Resource — Session Law 2023-63 (2023 Farm Act) requires
that the gases collected by a farm digester system begin to be used as a renewable energy
resource as quickly as feasible, but no later than within six months of the collection of gases.
Until the gases are being used as a renewable energy resource the gas shall be flared rather
than vented. Please provide information for the intended onsite and/or offsite use of biogas.
Please include expected timeline regarding collection of gases begins, completion of digester
system, and utilization of gas as a renewable energy resource.
Response: The applicant plans to utilize the biogas produced from the facility to generate a
renewable energy resource for export off the farm. Specific details of how the
applicant plans to do this are not yet released, but the applicant plans to begin
export of the renewable energy resource within 6 months of collecting gases in
accordance with the 2023 Farm Act.
6. Gas Generation Estimate —Please submit an estimate for the daily volume of biogas to be
generated by the proposed Digester.
Response: The daily volume of biogas varies based on animal stocking numbers, animal
age, and climatic variations. A gross estimate that is commonly used for in -
ground, ambient temperature digesters is about 2 cubic feet of biogas per pig
occupant in the farm per day; however, the actual amount of biogas produced by
the farm may vary significantly given the considerations described above.
7. Erosion on embankment — During the April 28, 2023 site visit, some erosion was noted along
existing lagoon embankment. Maintenance/repairs should be included in system installation.
Please describe repairs to be made.
Response: The owner will fill in the eroded areas of the embankment with suitable soil,
which will be compacted, topped with suitable soil to promote the growth of
grass, and seeded to establish grass and prevent future erosion. Additionally,
any necessary erosion maintenance/repairs noticed during construction will be
addressed during construction.

8. Odor Control Checklist —The Odor Control Checklist that was included did not have any Best
Management Practices (BMPs) selected. Please review and resubmit if any BMPs are to be
implemented. Please include the Permit Number on all pages of the Checklist and date page 1
Response: Please see attached, corrected Odor Control Checklist.
9. Insect Control Checklist— The Insect Control Checklist was not included in the application.
Please provide as a required component of the CAWMP.
Response: Please see attached, corrected Insect Control Checklist.
10. Mortality Management Checklist — No mortality management method was indicated/selected
on the Mortality Management Checklist included with the application. The Checklist was
signed by the owner, but not dated. The Checklist did not include Technical Specialist
signature or signature date. Please provide a completed Checklist.
Response: Please see attached, corrected Mortality Management Checklist.
11. Emergency Action Plan — The Emergency Action Plan was not included in the application.
Please provide as a required component of the CAWMP.
Response: Please see attached Emergency Action Plan.
12. O&M Plan — The Contact Information for Christine Lawson should be updated as follows:
Christine Lawson, Animal Feeding Operations Program, Div. of Water Resources, 1636 Mail
Service Center, Raleigh, NC 27699-1636, 919-707-3664. [e-mail]
Response: Please see attached, corrected O&M Plan.
13. Air Quality Permitting — Please provide general information regarding any Air Quality permits,
and/or applicability determinations regarding this project. Please provide information about if
applications have been filed, permits (if issued), and/or results of an applicability
determination.
Response: The farmer currently anticipates participating in a project where all biogas is
piped to a centralized facility that has an existing air quality permit.
Thank you for your assistance and review of the permit application package. Please do not hesitate to
contact our office should you have any questions, comments, or require any additional information.
Regards,
Cavanaugh & Associates, P.A.
Q OYJ ri t.
I1

Jeff P. Cappaclona, P.E.
Attachments
cc: Hc13 Farms of the Carolinas LLC

AWO-STATE-G-DIGESTER-7/07/2022 Page 2 of 6

Bull Run Volume Calculations
Project: Bull Run Location: Sampson County, NC Design By: JPC
Project No: BE.19.006 Checked By: JPC
Date: 2023-7-26
Existing Configuration (For Reference)
Farm Information:
Farm Population: 6,000 Finishing
Storm and Rainfall:
Storm (25-yr, 24-hr): 7.0 in.
Rainfall In Excess Of Evaporation: 7.0 in.
"Heavy Rain" 0.0 in.

CAVANAU G H
1 of 5

Proposed Configuration (Proposed Digester)
Flow Path:
Barns -> Digester (Proposed) -> Existing Lagoon
Volumes:
Capacity = 6,000 Finishing
Measured Sludge Depth
Planned Sludge Depth
Sludge to be Removed
CAVANAU G H
Stewardship Through Innovation
Oft
0 ft
0 cf
0 gal
Note: 'Measured Sludge Depth' (see above) is 0 cf for
Proposed Digesters
Capacit * ALW * cf/lb 1= Total
Treatment Volume = 1 6,000 135 11.00 810-000 W cf
ICapacity IDaysofStorage al/ head*da = Total
Daily Infow = 1 6,000 90 11.37 1739,800 gallons
98,904 cf
* Note: The existing volumes shown below are provided based on the existing lagoon design for this farm, sealed
by David S. Elkin (P.E. #023994) on 2011-2-11
Volume Required* cf
Digester
(Proposed)
Existing
Lagoon
Total
Required
Desired Digester Treatment Volume
194,400
N/A
194,400
Additional Treatment
12,426
603,174
615,600
Sludge Storage
0
0
0
Excess Wash Water
0
0
0
Rainfall In Excess Of Evaporation
0
122,751
122,751
Storm Storage
0
122,751
122,751
,"Heavy Rain"
0
0
0
Daily Inflow (90 days)
7,729
91,175
98,904
Total
214,555
1 939,851
1 1,154,405
Note: Both 'Rainfall In Excess Of Evaporation' and 'Storm Storage' are shown as 0 cf for the digester because the
HDPE cover prevents rain from entering the wastewater system and therefore doesn't need to be included in these
volume calculations; the rain that falls on the cover is simply pumped off of the cover with a rainwater pump(s).
That being said, per the NRCS 366 Anerobic Digester standard, rainfall is included in determining the operational
volume of the digester. The NOAA Atlas 14 30yr normal rainfall data for the area has been used to determine the 25-
year, 24-hour rainfall on the digester. With this data, the following value has been used for the the 25-year, 24-hour
rainfall event:
Digester Storm (25-yr, 24-hr): 7.5 in.
Volume Provided* (cf
Digester
(Proposed)
Existing
Lagoon
Total
Provided
Desired Digester Treatment Volume
194,400
N/A
194,400
Additional Treatment
12,426
603,174
615,600
Sludge Storage
0
0
0
Excess Wash Water
0
0
0
Rainfall In Excess Of Evaporation
0
122,751
122,751
Storm Storage
0
133,946
133,946
"Heavy Rain"
0
0
0
Daily Inflow (90 days)
7,729
1,024,833
1,032,562
Total
214,555
1 1,884,704
1 2,099,259
Totals (cf)
Volume
Required* (cf)
Volume
Provided* (cf)
Efficiency
Treatment
810,000
810,000
100%
Sludge Storage
0
0
N/A
Excess Wash Water
0
0
N/A
Rainfall In Excess Of Evaporation
122,751
122,751
100%
Storm Storage
122,751
133,946
109%
"Heavy Rain"
0
0
N/A
Daily Inflow (90 days)
98,904
1,032,562
1044%
Total
1,154,405
1 2,099,259
182%
Days of Storage:
Proposed Configuration
Required rove e
Dail Inflow Volume cu.ft. 98,9041 1,032,562
Days of Storage 901 940
2of5

Total Temporary Storage
Proposed Configuration (Proposed Digester)
Temporary Storage Volume Required* (cf)
Digester
(Proposed)
Existing
Lagoon
Total
Required
Excess Wash Water
0
0
0
Rainfall In Excess Of Evaporation
0
122,751
122,751
"Heavy Rain"
0
0
0
Daily Inflow (90 days)
7,729
91,175
98,904
Total
1 7,7291
213,925
221,655
Temporary Storage Volume Provided* (cf)
Digester
(Proposed)
Existing
Lagoon
Total
Provided
Excess Wash Water
0
0
0
Rainfall In Excess Of Evaporation
0
122,751
122,751
"Heavy Rain"
0
0
0
Daily Inflow (90 days)
7,729
1,024,833
1,032,562
Total
1 7,7291
1,147,5841
1,155,313
Summary
Total Temporary Storage (cf)
Proposed Configuration
Required
Provide
Excess Wash Water
0
0
Rainfall In Excess Of Evaporation
122,751
122,751
"Heavy Rain"
0
0
Daily Inflow (90 days)
1 98,904
1,032,562
Total
1 221,655
1,155,313
CAVANAU G H
3of5

Digester (Proposed) Volume
Di ester Proposed Stage -Storage
Elevation ft
Area sf
Incr. Vol cf
Cumul. Vol cf
128.64
11,677
-
0
129.64
13,234
12,455
12,455
130.64
14,863
14,048
26,503
131.64
16,564
15,713
42,216
132.64
18,337
17,450
59,666
133.64
20,182
19,259
78,925
134.64
22,099
21,140
100,065
135.64
24,088
23,093
123,158
136.64
26,149
25,118
148,276
137.64
28,282
27,215
175,491
138.64
30,487
29,384
204,875
139.64
32,764
31,625
236,500
140.64
1 35,113
1 33,938
1 270,438
Digester Desired Volume: 194,400 cu ft. (7,200 cy)
Digester Treatment Volume
(@ Treatment Elevation of 138.70): 206,826 cu ft. (7,660 cy)
% Desired:
Digester (Proposed) Updated Elevations:
106%
Zone
Volume
Cumulative Vol.
Elevation
Depth (in.)
Planned Sludge
0
0
128.64
144.00
Treatment
206,826
206,826
138.70
23.28
Temporary
7,729
214,555
138.95
20.28
Storm
0
214,555
138.95
20.28
= 140.64' (270,438 cf)
Top of Storm Elev = 138.95' (20.28") (214,555 cf)
Top of Temp Storage Elev = 138.95' (20.28") (214,555 cf) (Start Pump)
Top of Treat Elev = 138.70' (23.28") (206,826 cf) (Stop Pump)
Mli
CAVANAU G H
Stewardship Through Innovation
4 of 5

Existing Lagoon Volume
Existing Lagoon Stage -Storage
Elevation ft
Area sf
Incr. Vol cf
Cumul. Vol cf
127.71
83,878
-
63,990
128.71
160,337
92,108
156,098
129.71
117,094
108,716
264,813
130.71
133,014
125,054
389,867
131.71
143,914
138,464
528,331
132.71
151,813
147,864
676,195
133.71
159,008
155,411
831,605
134.71
165,479
162,244
993,849
135.71
171,659
168,569
1,162,418
136.71
177,762
174,711
1,337,128
137.71
183,853
180,808
1,517,936
138.71
190,156
187,005
1,704,940
139.71
196,433
193,295
1,898,235
140.64
210,430
189,191
2,087,426
CAVANAU G H
Stewardship Through Innovation
Note: The dimensions and volumes shown are provided based on the lagoon design for the existing lagoon on this farm,
sealed by David S. Elkin (P.E. #23994) on 2011-2-11.
Additionally, that lagoon design from 2011 appears to have erroneous entries in the stage -area table for the top of dike
elevation and area, which have been corrected in the table above. Since the changes only affect the top of dike, the
changes don't affect the volume provided (i.e. at freeboard), and the increase in top of dike area requires an increase in
required stormwater volume leading to a more conservative design compared to the design from 2011.
Existing Lagoon Updated Elevations:
Zone
Volume
Cumulative Vol.
Elevation
Depth (in.)
Sludge
0
0
127.71
155.16
Treatment
603,174
603,174
132.22
101.04
Temporary
1,147,584
1,750,758
138.95
20.28
Storm
133,946
1,884,704
139.64
12.00
Elev = 140.64' (2,087,426 cf)
Top of Storm Elev = 139.64' (12.00") (1,884,704 cf)
Top of Temp Storage Elev = 138.95' (20.28") (1,750,758 cf) (Start Pump)
Top of Treat Elev = 132.22' (101.04") (603,174 cf) (Stop Pump)
5of5

Narrative
'Bull Run' will utilize existing barns with slotted floors over flushing pits to collect manure.
Upon flushing, Barns 1-5 will gravity flow waste through a 12" pipe to the mixing station. The mixing
station will utilize two 15 hp GEA pumps, each capable of flowrates up to 1,600 gpm, where waste will
be mixed and pumped into the anaerobic digester through a 12" HDPE (DR 17) forcemain. In the event
of pump failure, a 12" bypass pipe will gravity flow waste to the existing Lagoon to prevent overflow of
the mixing station.
After treatment in the anaerobic digester (270,438 cubic feet of total volume, 206,826 cubic feet at
Operation Level), effluent will gravity flow through the 12" digester outlet pipe to the existing Lagoon,
where it will be irrigated in accordance with the waste utilization plan.

3,k\ F"h
EMERGENCY ACTION PLAN
PHONE NUMBERS
DIVISION OF WATER QUALITY (DWQ) [phone]
EMERGENCY MANAGEMENT SERVICES (EMS) [phone]
SOIL AND WATER CONSERVATION DISTRICT (SWCD) [phone]
NATURAL RESOURCES CONSERVATION SERVICE (NRCS) [phone]
COOPERATIVE EXTENSION SERVICE (CES) [phone]
This plan will be implemented in the event that wastes from your operation are leaking,
overflowing or running off site. You should not wait until wastes reach surface waters or
leave your property to consider that you have a problem. You should make every effort to
ensure that this does not happen. This plan should be posted in an accessible location
for all employees at the facility. The following are some action items you should take.
1. Stop the release of wastes. Depending on the situation, this may or may not be possible. Suggested
responses to some possible problems are listed below.
A. Lagoon overflow - possible solutions are:
a) Add soil to berm to increase elevation of dam.
b) Pump wastes to fields at an acceptable rate.
c) Stop all flow to the lagoon Immediately.
d) Cali a pumping contractor.
e) Make sure no surface water is entering lagoon.
B. Runoff from waste application field -actions include:
a) Immediately stop waste application.
b) Create a temporary diversion to contain waste.
c) Incorporate waste to reduce runoff.
d) Evaluate and eliminate the reason(s) that cause the runoff.
e) Evaluate the application rates for the fields where runoff occurred.
C. Leakage from the waste pipes and sprinklers - action Include:
a) Stop recycle pump.
b) Stop irrigation pump.
c) Close valves to eliminate further discharge.
d) Repair all leaks prior to restarting pumps.
D. Leakage from flush systems, houses, solid separators - action include:
a) Stop recycle pump.
b) Stop Irrigation pump.
c) Make sure siphon occurs.
d) Stop all flow in the house, flush systems, or solid separators.
E. Leakage from base or sidewail of lagoon. Often this is seepage as opposed to flowing leaks -
possible action:
a) Dig a small sump or ditch from the embankment to catch all seepage, put in a submersible
pump, and pump back to lagoon.
b) If holes are caused by burrowing animals, trap or remove animals and fill holes and
compact with a day type soil.
c) Have a professional evaluate the condition of the side walls and the lagoon bottom as soon
as possible.

2. Assess the extent of the spill and note any obvious damages.
a. Did the waste reach surface waters?
b. Approximately how much was released and for what duration?
c. Any damage notes, such as employee injury, fish kills, or property damage?
d. Did the spill leave the property?
e. Does the spill have the potential to reach surface waters?
f. Could a future rain event cause the spill to reach surface waters?
g. Are potable water wells in danger (either on or off the property)?
h. How much reached surface waters?
Contact appropriate agencies.
a. During normal business hours call your DWQ regional office; Phone #, After hours,
emergency number: [phone]. Your phone call should include: your name, facility
number, telephone. number, the details of the incident from item 2 above, the exact
location of the facility, the location or direction of the movement of the spill, weather and
wind conditions. The corrective measures that have been under taken, and the
seriousness of the situation.
b. If the spill leaves property or enters surface waters, call local EMS phone number.
c. Instruct EMS to contact local Health Department
d. Contact CE's phone number, local SWCD office phone number and the local NRCS
office for advice / technical assistance phone number.
4. If none of the above works call 911 or the Sheriffs Department and explain your problem to
them and ask the person to contact the proper agencies for you.
5. Contact the contractor of your choice to begin repair or problem to minimize offsite damage.
a. Contractors Name: lr--C-I<
b. Contractors Address:
c. Contractors Phone: ig I O a 9 p 01
6. Contact the technical specialist who certified the lagoon (NRCS, Consulting Engineer, etc.)
a. Name: r.- � ,c�i ;... s t I
b. Phone: (nl[.� 3 -%q
7. Implement procedures as advised by DWQ and technical assistance agencies to rectify the
damage, repair the system, and reassess the waste management plan to keep problems
with release of wastes from happening again.

Insect Control Checklist for Animal Operations
Source Cause BMPs to Control Insects Site Specific Practices
Liquid Svstems
Flush gutters • Accumulation of solids ® Flush system is designed and operated sufficiently
to remove accumulated solids from gutters as
esigned
Remove bridging of accumulated solids at
dischar e
Lagoons and pits Crusted solids C1 Maintain lagoons, settling basins and pits where
pest breeding is apparent to minimize the crusting
of solids to a depth of no more than 6 to 8 inches
oyer more than 30 percent of surface
Excessive vegetative • Decaying vegetation M/Maintain vegetative control along banks of
growth lagoons and other impoundments to prevent
accumulation of decaying vegetative matter along
water's edge on impoundment's perimeter.
Dry Svstems
Feeders • Feed spillage 13"Design, operate, and maintain feed systems
(e.g., bunkers and troughs) to minimize the
/accumulation of decaying wastage
C; Clean up spillage on a routine basis (e.g., 7- to 10-
day interval during summer; 15- to 30-day interval
during winter)
AMIC - November 11, 1996, page 1

Insect Control Checklist for Animal Operations
Source Cause BMPs to Control Insects Site Specific Practices
Feed storage Accumulations of feed O Reduce moisture accumulation within and around
residues immediate perimeter of feed storage areas by
ensuring drainage is away from site and/or providing
adequate containment (e.g., covered bin for VP
brewer's grain and similar high moisture grain
products)
O Inspect for and remove or break up accumulated
solids in filter strips around feed storage as needed
Animal holding areas • Accumulations of animal 0 Eliminate low areas that trap moisture along fences
wastes and feed wastage and other locations where waste accumulates and
disturbance by animals is minimal _ / INO Maintain fence rows and filter strips around animal JV
holding areas to minimize accumulations of wastes
(i.e., inspect for and remove or break up
accumulated solids as needed)
Dry manure handling . Accumulations of animal 0 Remove spillage on a routine basis (e.g.,
systems wastes 7- to 10-day interval during summer; 15- to 30-day
interval during winter) where manure is loaded for
land application or disposal /
O Provide for adequate drainage around manure �J
stockpiles
O Inspect for and remove or break up accumulated
wastes in filter strips around stockpiles and manure
handling areas as needed
For more information contact:
Cooperative Extension Service, Department of Entomology, Box 7613, North Carolina State University, Raleigh, NC 27695-7613.
AMIC - November 11, 1996, page 2

Swine Farm Waste Management — Odor Control Checklist
Permit No.: juSVZ oo3?
Date: 7 —
INSTRUCTIONS FOR USE Owner Signature:ui&��;Z'
♦ Odor Control Checklist is required by General Statute 143-215.10C(e)(1)
♦ Check any/all the BMPs you will implement on this facility. Items checkedLselected become a requirement of the CAWMP.
♦ Items in bold or pre -selected are required.
♦ Add any site -specific details related to the selected BMPs
♦ Include any other odor control measures not listed
♦ NOTE: Not all BMPs may be cost-effective for every facility. Evaluate each BMP prior to selecting for your facility.
Cause/Source BMP Option to Minimize Odor Comments Site Specific Practices
FARMSTEAD
♦ Swine Production Maintain vegetative or wooded buffers at or
near property boundary
♦ Improper drainage Grade and landscape so water drains away
om facilities and prevent ponding
Maintain farm access roads and prevent traffic
in waste application area
❑ Other BMPs — please describe
MORTALITY MANAGEMENT
♦ Carcass ® Dispose of mortality using method approved
Decomposition by NCDA&CS State Veterinarian. Manage
According to CAWMP (Mortality Management
Checklist) and permit(s).
❑ Put carcasses in refrigerated (or freezer) dead
boxes within 24 hours for short-term mortality
storage.
♦ Incomplete Incineration ❑ Use incinerators with secondary burners for
complete combustion.
❑ Other BMPs — please describe
• Traps dust and gases, provides dilution
and visual screening
• May require third party input/approval
• Reduce odors and vectors that occur
with stagnant conditions
• Prevents spillage during transport and
tracking of waste onto public roads
• Required by statute and permit
• May require third party input/approval
• Reduce odors by complete incineration
Swine AMOC Page 1 of 6 APPROVED — 7/25/2019

Swine Farm Waste Management — Odor Control Checklist
Permit No.: AK)56aQ5J_3
Cause/Source BMP Option to Minimize Odor Comments Site Specific Practices
HOUSE / BARN — WASTE HANDLING
♦ Flush tanks
❑ Install flush tank covers
• Pit -flush systems
♦ Odorous Gases
❑ lush pits at least 4 times per day
• Pit -flush systems
♦ Partial microbial
[eEEmpty pits at least once every 7 days
• Pit -recharge or "pull -plug" systems
decomposition
❑ Underfloor flush with pit ventilation
♦ Agitation of wastes
❑ Install/extend fill lines to near bottom of
tanks with anti -siphon vents
❑ Install covers on outside waste collection or
junction box
stall sump tank covers for lift stations
♦ Ammonia
VFlush/recharge with treated effluent
❑ Treat waste in pits with proven biological or
• Monitor for any solids accumulation in pit
chemical additive
❑ Other BMPs — please describe
HOUSE / BARN — FLOOR AND INDOOR SURFACES
♦ Manure covered floors crape manure from alleys into pens daily
Vstall fully slotted floor system
[Install waterers over slotted floor area
Install feeders at high end of solid floors
♦ Odorous Gases Scrape manure buildup from floors and walls
Keep floors dry
❑ Install underfloor ventilation for drying
❑ Replace bedding/scrape at frequency to
keep bedding dry
❑ Other BMPs — please describe
Swine AMOC
• Will move with other manure via pits
• Where applicable
• Aids in animal cleanliness
• Aids in animal cleanliness
• Solid floor/bedding systems
Page 2 of 6
APPROVED — 7/25/2019

Swine Farm Waste Management — Odor Control Checklist
Permit No.:
Cause/Source BMP Option to Minimize Odor Comments Site Specific Practices
HOUSE / BARN — VENTILATION
♦ Dust ❑ can fans regularly — specify frequency
♦ Volatile/odorous gases 57 fficient air movement
[Install temperature and humidity sensors to
control ventilation
❑ Treat barn exhaust
❑ Other BMPs — please describe
HOUSE / BARN — FEED
♦ Dust ❑ Install feed covers
♦ Adsorbed Gases ® Keep outdoor feed storage covered except
][When necessary to add/remove feed
Minimize free -fall height of dry feed
❑ Install feed delivery downspout extenders
to the feed covers
emove spoiled/unusable feed on regular basis
eed pellets instead of dry meal
se feed additives
♦ Ammonia Use feed -reduced crude protein diet
❑ Other BMPs — please describe
HOUSE / BARN — GENERAL
♦ Dust Cl/Install temperature and humidity sensors
♦ Odorous Gases to control ventilation
❑ Use ultraviolet light to treat indoor air
❑ Use indoor or outdoor electrostatic space
charge system
❑ Other BMPs — please describe
• Examples: biofilters, wet scrubbing, windbreaks
• May reduce ventilation rate depending on method
• Required by rule 15A NCAC 02D .1802
• May require third party input/approval
• May require third party input/approval
• May require third party input/approval
• Maintain relative humidity at 40 to 65%
• Can be used to treat exhaust air
Swine AMOC Page 3 of 6 APPROVED — 7/25/2019

Swine Farm Waste Management — Odor Control Checklist
Permit No.: 4r-3s'-xV3S
Cause/Source BMP Option to Minimize Odor Comments Site Specific Practices
LAGOON / WASTE STORAGE STRUCTURE
♦ Volatile Gases ® Maintain proper lagoon volume
Minimize free -fall height of waste from
discharge pipe to lagoon surface
❑ Extend discharge point of pipe to below lagoon
liquid level
F.YMaintain proper surface area -to -volume ratio
El Use correct lagoon start-up procedures
❑ Aerate for odor control
® Manage sludge levels based on annual sludge
I
urvey as required by permit
Keep spilled feed or foreign debris out of lagoon
to prevent excess sludge accumulation
❑ Install/use solids separation system
❑ Use proven biological or chemical additives
❑ Use permeable lagoon covers (not a digester)
❑ Use impermeable lagoon cover or
anaerobic digester
❑ Other BMPs — please describe
LAND APPLICATION
♦ Odorous gases ® Perform land application in accordance with
CAWMP
♦ Wind drift 7Fo1m1cw
p intake near lagoon surface
p from second stage lagoon
good neighbor policy
Operate at minimum recommended pressure
❑ Increase setbacks beyond those required by
statute, rule, or permit
• Sufficient liquid volume/depth is required
for proper anaerobic treatment
• Use caution not to scour or damage lagoon liner
• Monitor for any increase in rate of solids accumulation
• Methane can be flared if not utilized
• Required by rule 15A NCAC 02D .1802
• Avoid application on known weekends,
special days, or holidays/eves if possible
Swine AMOC Page 4 of 6 APPROVED — 7/25/2019

Swine Farm Waste Management — Odor Control Checklist
Permit No.: n 05V)CO3,�
Cause/Source BMP Option to Minimize Odor Comments Site Specific Practices
LAND APPLICATION (CONTI7Apply
)
during favorable wind conditions,
(especially for traveling guns or impact
sprinklers)
When practical, apply waste on sunny days
Wather than cool, overcast days
hen possible, apply waste mid -morning to
late -afternoon
• Recommend checking predicted average hourly
wind speed within 24 hours prior to
anticipated start
• Allows for vertical dissipation of odor
• Allows for better vertical dissipation of odor
❑ For traveling guns, use taper -ring or taper -bore • Less odor and drift than ring nozzles
nozzles
❑ For traveling guns, use largest -available nozzle
that provides acceptable application uniformity
❑ Replace impact sprinklers with low -drift nozzles
j[]on center pivots and linear move systems.
Use hose -drag system
❑ Use injection method for waste application
❑ Other BMPs — please describe
SLUDGE DISPOSAL
♦ Odorous gases ransport sludge in covered vehicles or tankers
Ypply in thin, uniform layers • Speeds drying and prevents ponding
Incorporate land -applied sludge as soon as • Required within 48 hours or prior to next rain event,
practical after application, and in accordance whichever is first, for conventionally tilled
with permit. bare soils
❑ Use injection method for sludge application
❑ Dewater sludge prior to application
❑ Use alternatives to land application, such as
compost, gasification, energy generation, etc.
❑ Other BMPs — please describe
Swine AMOC Page 5 of 6 APPROVED — 7/25/2019

ADDITIONAL INFORMATION AVAILABLE FROM:
Air Management Practices Assessment Tool (AMPAT)
AHG-538-A Certification Training for Animal Waste Management Systems: Type A
EBAE 103-83 — Lagoon Design and Management for Livestock Manure Treatment and Storage
EBAE 128-88—Swine Production Facility Manure Management: Pit Recharge -Lagoon Treatment
EBAE 129-88 — Swine Production Facility Manure Management: Underfloor Flush -Lagoon Treatment
EBAE Fact Sheet — Calibration of Manure and Wastewater Application Equipment
EBAE Fact Sheet — Swine Production Farm Potential Odor Sources and Remedies
NC NRCS Standard 359 — Waste Treatment Lagoon
NC NRCS Standard 380 — Windbreak/Shelterbelt Establishment
NC NRCS Standard 422 — Hedgerow Planting
NC NRCS Standard 442 — Sprinkler System
Nuisance Concerns in Animal Manure Management: Odors and Flies; PRO107 1995 Conference Proceedings
Options for Managing Odor: A Report from the Swine Odor Task Force
www.extension.iastate.edu/ampat/
NC Division of Water Resources
www.bae.ncsu.edu
www.bae.ncsu.edu
www.bae.ncsu.edu
www.bae.ncsu.edu
www.bae.ncsu.edu
www.nrcs.udsa.gov
www.nres.udsa.gov
www.nres.udsa.gov
www.nres.udsa.gov
Florida Cooperative Extension Service
NC State University
Swine AMOC Page 6 of 6 APPROVED — 7/25/2019

Version —November 26, 2018
Mortality Management Methods
Indicate which method(s) will be implemented.
When selecting multiple methods indicate a primary versus secondary option.
Methods other than those listed must be approved by the State Veterinarian.
Primary Secondary Routine Mortality
Burial three feet beneath the surface of the ground within 24 hours of knowledge of animal
death. The burial must be at least 300 feet from any flowing stream or public body of water
(G.S.106-403). The bottom of the burial pit should be at least one foot above the seasonal
high water table. Attach burial location map and plan.
aI� Landfill at municipal solid waste facility permitted by NC DEQ under GS 15A NCAC
`� 13B .0200.
® Rendering at a rendering plant licensed under G.S. 106-168.7.
71 171 Complete incineration according to 02 NCAC 52C .0102.
A composting system approved and permitted by the NC Department of Agriculture & Con-
sumer Services Veterinary Division (attach copy of permit). If compost is distributed off -farm,
additional requirements must be met and a permit is required from NC DEQ.
In the case of dead poultry only, placing in a disposal pit of a size and design approved by the
NC Department of Agriculture & Consumer Services (G.S. 106-549.70).
j Any method which, in the professional opinion of the State Veterinarian, would make possible
I� the salvage of part of a dead animal's value without endangering human or animal health.
(Written approval by the State Veterinarian must be attached).
Mass Mortality Plan
Mass mortality plans are required for farms covered by an NPDES permit. These plans are
also recommended for all animal operations. This plan outlines farm -specific mortality man-
agement methods to be used for mass mortality. The NCDA&CS Veterinary Division sup-
ports a variety of emergency mortality disposal options; contact the Division for guidance.
• A catastrophic mortality disposal plan is part of the facility's CAWMP and is activated
when numbers of dead animals exceed normal mortality rates as specified by the State
Veterinarian.
• Burial must be done in accordance with NC General Statutes and NCDA&CS Veterinary
Division regulations and guidance.
• Mass burial sites are subject to additional permit conditions (refer to facility's animal
waste management system permit).
• In the event of imminent threat of a disease emergency, the State Veterinarian may enact
additional temporary procedures or measures for disposal according to G.S. 106-399.4.
Date
Date

Anaerobic Digester System O&M
Table of Contents
I. Definitions.............................................................................................................................................2
II. Introduction..........................................................................................................................................
3
III. Description of the Operational Components....................................................................................3
1) Gravity Collection Pipe..................................................................................................................3
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......................................................................................................9
IV. Description of Anticipated Maintenance..........................................................................................9
A. Routine System Maintenance Instructions.......................................................................................9
B. Troubleshooting..............................................................................................................................10
C. Emergency Protocols, Repair, and Replacement............................................................................10
D. Warranty Information.....................................................................................................................11
1) Farm Site.....................................................................................................................................11
V. Provisions for Safety Measures...........................................................................................................11
VI. Spill Prevention and Control Provisions..........................................................................................12
Appendix A: Contact Information.............................................................................................................13
Appendix B: Farm Operations and Maintenance Checklist.....................................................................15
Anaerobic Digester System O&M Page 1 of 16

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 (COA.
Anaerobic Digester System O&M Page 2 of 16

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 digester 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 anoxic bacteria. 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.
1) Gravity Collection Pipe
Anaerobic Digester System O&M Page 3 of 16

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 or other downstream processes.
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 automatically cycle on and off 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 2nd 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 3rd 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 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
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.
Anaerobic Digester System O&M Page 4 of 16

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 normal
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, which is
further described below.
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 biogas conditioning system for dehydration and pressurization.
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
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.
Anaerobic Digester System O&M Page 5 of 16

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 liquids from the anaerobic digester and pumps that
waste to the downstream influent storage lagoon via buried forced main. The liquid
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 2nd 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 3rd 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 O&M Page 6 of 16

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 normal
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. The inlet pipe to the effluent pump station should remain
submerged in water at all times to prevent the escape of gases from beneath the
digester cover.
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. The outlet pipe from the anaerobic digester into the storage lagoon should
remain submerged at all times to prevent the escape of gases from beneath the digester
cover. As such, it is not uncommon for the pipe to turn down and follow the direction of
the inner slope of the lagoon to ensure submergence during times when the lagoon
liquid level may be low due to normal pumping and irrigation activities.
7) Biogas Conditioning System
Anaerobic Digester System O&M Page 7 of 16

The Biogas conditioning system receives biogas from the anaerobic digester and
removes moisture from the biogas by means of compression and heat exchangers.
This system will be managed by a 3rd 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. The moisture that is removed should be directed back to the digester mixing
pump station or other suitable reception pipe for proper management of the
condensate.
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 biogas conditioning skid
approaches this setpoint, it will automatically reduce blower or compressor speed to
seek a flowrate that matches the biogas production. If the vacuum pressure exceeds
the setpoint, the biogas conditioning 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 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
simply and manually operated through use of a local disconnect. Under normal
Anaerobic Digester System O&M Page 8 of 16

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
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, as specified in the operations and
maintenance manual for each piece of equipment provided by the equipment
manufacturer.
The farm owner will need to periodically remove accumulated sludge from the anaerobic
digester. Accumulated sludge may be removed via the anaerobic digester mixing pumps. To
use these pumps for sludge removal, the system operator should cease mixing pump
operation 48 hours prior to the date of desired sludge removal to allow for settling of
heavier sludge to the pump inlet. A quick disconnect fitting is provided for each mixing
pump that will facilitate the connection of the pump discharge to sludge application
Anaerobic Digester System O&M Page 9 of 16

equipment as chosen by the farm owner, such as slurry tanks or umbilical hose application
systems. All sludge applications should be done in accordance with the approved waste
utilization plan and nutrient management plan for the farm or hauled via tanker to an
approved application site by a contract sludge hauler.
Typically, a small amount of sludge will need to be removed from the anaerobic digester
every other year. The system operator can monitor sludge accumulation via the inspection
ports on top of the digester cover. A pipe or gauge with graduated markings used to
determine depth may be used to assess the sludge depth in the digester. Care should be
taken when inserting the gauge or pipe to not apply excessive pressure or otherwise
puncture the digester liner. Sludge accumulation should be assessed on an annual basis by
the system operator. As the digester cover typically accumulates biogas, care should also be
taken by the operator to remove as much accumulated biogas as possible prior to opening
the inspection port and measuring sludge accumulation. As biogas production slows during
cold weather, it is recommended that this measurement occur during the winter when
biogas accumulation is at a minimum.
After completion of sludge removal activities using the anaerobic digester mixing pumps,
the operator should reconnect all fittings and piping as found prior to the sludge removal
and re-engage the digester mixing pumps operation in accordance with the schedule and
manner in which they had been previously operated.
See Appendix C 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. Biogas Conditioning System
S. 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)
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.
Anaerobic Digester System O&M Page 10 of 16

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: "AGRUAMERICA, 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 forms 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 3rd 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
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
Anaerobic Digester System O&M Page 11 of 16

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. No person should Enter
a waste collection pit, pump station well, or any portion of the anaerobic digester unless all
accumulated biogas has been removed via venting or other utilization and sufficient airflow has
been directed to the workspace via fans, blowers, or other means. Personal safety is the
responsibility of the person or organization conducting the work, and not specifically the
responsibility of the farm owner or other associated equipment providers or construction
contractors.
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. It is recommended that any
combustion source or open flame be kept to a minimum separation distance of 50 ft from the
anaerobic digester cover.
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 12 of 16

Appendix A: Contact Information
Project Management and Equipment Service Providers:
Management & Equipment
CompanyProject
Contact/Local Service
Influent Pump Station
Lee Brock
Brock Equipment Company
lee@ brockeguipment.com
[phone]
Anaerobic Digester Cover
Plastic Fusion Fabricators, Inc.
Larry Hice
[e-mail]
[phone]
Mixing Pump Station
Lee Brock
Brock Equipment Company
lee@ brockeguipment.com
[phone]
Transfer Pump
Lee Brock
Brock Equipment Company
[e-mail]
[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 13 of 16

Regulatory and other Agencies:
Christine Lawson
Animal Feeding
1636 Mail Service
[phone]
Operations Program,
Center, Raleigh, NC
Div. of Water
27699-1636
Resources
Anaerobic Digester System O&M Page 14 of 16

Appendix 6: 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 I
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 I
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 15 of 16

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 16 of 16

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Grade:
i
140.64
ft
FFinished
141.64
ft
n (Gravity Mixing Pipe):
130.64
ft
Invert In (From Barns):
138.75
ft
I Bypass Riser:
Bypass Inv. Out of Wall:
140.64
139.14
ft
ft
Bottom of Wet Well:
129.64
ft
Depth of Wet Well:
12.00
ft
Design Flow:
1,600
gpm
Selected Pump Rate:
1,600 (1 pump)
gpm
Total Dynamic Head (TDH):
16
ft
Pump Horsepower:
2x7.5 hp
Pump Speed (RPM):
1,760 RPM
Electrical Supply:
240 V
Electrical Frequency:
60 hz
Phase:
10
Impeller Diameter:
10 in.
Motor Type:
TEFC
Selected Pump:
GEA
Pump Model:
8" Flush
Shaft Length:
12 ft.
Length:
265
ft
Width
132.5
ft
Top of Dike Elev:
140.64
ft
Operating Level Elev:
138.95
ft
Bottom Elev:
128.64
ft
Total Volume:
270,438
cf
Volume at Operating Level:
206,826
cf
S.A. @ Inside Top of Dike:
35,113
ftz
Slope:
3:1 -
Total Cut
Total Fill
Net Surplus
3,972
CY
5,138
CY
-1,166
CY
Finished Grade:
140.64
ft
Rim:
141.14
ft
Invert In:
135.49
ft
Bottom of Wet Well:
133.14
ft
Depth of Wet Well:
1 8. 001
ft
Section
iDescription
lQuantity
JUnit
lAdditional Info
Gravity Waste Collection (GWC)
GWC-I-PIPE
12" HDPE (DR 17) Gravity Collection Line
551
L.F.
GWC-2-CO
lCleanout
1
each
Influent Lift Station & Forcemain (ILS)
ILS-I-PS
Influent Lift Station
-
-
N/A
ILS-2-INV
12" Digester Bypass Inlet
-
-
N/A
ILS-3-PIPE
12" HDPE (DR 17) Digester Bypass Pipe
0
L.F.
N/A
ILS-4-INV
12" Digester Bypass Outlet
-
-
I N/A
ILS-5-FM
8" HDPE (DR 17) Forcemain
0
L.F.
I N/A
ILS-6-INV
8" HDPE (DR 17) Forcemain Inv. Out
-
-
N/A
Digester(D)
D-1-DIGESTER
Proposed Digester
-
-
Table 4/C.2.4.1 and Sheet C.3.4
D-2-MPS
Mixing Pump Station
-
-
Table 3/C.2.4.1 and Sheet C.3.3
D-3-PIPE
12" HDPE (DR 17)
631
L.F.
D-4-SUMP
HDPE Sump Box Mixing System Inlet
Not used
D-S-FM
12" HDPE (DR 17) Forcemain
37
L.F.
Inv. Out 136.64'
D-6-PRA
Pump Repair Area
-
-
D-7-BAF
HDPE Baffle (Underflow)
-
-
SheetC.3.4
D-8-BAF
--------
D-9-INV
HDPE Baffle (Overflow) -------
--------------
12" Digester Bypass Inlet
Not used
----------------------------
- - I Inv. 139.14'
D-10-PIPE
12" HDPE (DR 17) Digester Bypass Pipe
42
L.F.
D-11-INV
--------
D-12-SLG
12" Digester Bypass Outlet
---------------------
Sludge Removal Pipes (HDPE DR 17)
-
----------------------------
120
-
L.F.
Inv. 139.64'
13 pipes at 40 L.F. each
Level Control (LC)
LC-I-INV
Digester Inv. Out
-
-
Inv. 138.70'
LC-2-PIPE
12" HDPE (DR 17) Digester Outlet Pipe
251
L.F.
LC-3-PS
Level Control Station
Not used
LC-4-FM
6" HDPE (DR 17) Forcemain
Not used
LC- 5-INV
Lagoon Invert From Digester
-
-
Inv. 138.05'
LC-6-WW
Level Control Wet Well
-
-
Table 5/C.2.4.1 and Detail 2/C.3.2B
LC-7-PIPE
12" PVC (DR 35) Digester Outlet Pipe
25
L.F.
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Farm Name:
C & M I
Permit Number:
AWS820038
Permitted Capacity:
6,000
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OF EXISTING LAGOON HAS BEEN LIMITED TO
SAME ELEVATION AS UPSTREAM DIGESTER
OPERATING LEVEL (OL) IN ORDER TO KEEP
DIGESTER WATER LEVEL IN PERMIT COMPLIANCE
PROPOSED LEVEL CONTROL
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WET WELL (LC-6)
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145
FFE: 143.70'
FFE:
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FFE: 143.80
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TOD: 140.64'
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PROPOSED
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140
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138.70'
�
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INV:138.75'
— q
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E
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TOP OF TEMP.
TOD: TOP OF DIKE
LEVEL CONTROL
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STORAGE: 138.95'
TOB: TOP OF BANK
(LC-2)
FFE: FINISH FLOOR ELEVATION
INV: 135.64'
135
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EG: EXISTING GRADE
EMERGENCY BYPASS TO
0.5% MIN. SLOPE
135
OL: OPERATING LEVEL
EXISTING LAGOON
INV:
135.49'
RISER INV. 140.64'
m
WALL INV. 139.14' (D-9)
EXISTING LAGOON
Q.
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INVERTS OF EXISTING GRAVITY PIPING ARE
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130
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ASSOCIATES, P.A. DO NOT COPY,
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WHOLE OR PART
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