660030_Add-Info Response_20230103

Smithfield
6
Good food.1ZesP0VL'S lug.
PO Box 856
Warsaw, NC 28398
January 3, 2023
Ms. Christine Lawson
Water Quality Permitting Section
Animal Feeding Operations Program
1636 Mail Service Center
Raleigh, NC 27699-1636
Re: Additional Information Request
Application No. ADS660030
Farms 27-30
Washington County
Dear Ms. Lawson:
Smithfield Hog Production appreciates your review of our application for permit under the Digester General Permit. In
response to your October 17, 2022 request for additional information; we are submitting the included responses to your
questions. I have included your original questions in bold and our responses are below each question
This package is being submitted for permit plan approval by NCDWR for the proposed covered lagoon digesters. The
following items are included in this package:
Updated CAWMP
o Updated Nutrient Management Plan
o Updated Irrigation Plan
o Odor Control Checklist
o Insect Control Checklist
o Mortality Management Checklist
o Emergency Action Plan
2022 Sludge Survey
Updated Engineering Drawings
Thank you for taking the time to review this project. Please contact meat [phone] [e-mail]
if you have any questions or need additional information.
Sincerely,
Jason E. Olmstead, P.E.
Engineering Project Manager

• Page 2
January 3, 2023
1. Freeboard — NC NRCS Standard 366 —Anaerobic Digester requires a minimum of 2 feet of
freeboard in the covered digester. Please provide clarification that both digesters meet minimum
freeboard requirements.
"Provide a minimum of 2 feet of freeboard above the digester design water surface; if rainfall is
included in determining the operating volume, only 1 foot of freeboard is required. The digester
storage volume does not need to account for rainfall for completely covered digesters."
Per the NRCS 366 Anerobic Digester standard rainfall was included in determining the operational
volume of the digesters. The NOAA Atlas 14 30yr normal rainfall data for the area was used to
determine the 25-year, 24-hour rainfall on the digester. With this data the operational volume for the
digester designs at this site are based on 12-inches of structural freeboard plus 7-inches for the 25-
year, 24-hour rainfall event to determine the 19-inches of freeboard for the digesters.
This allows the covered lagoon digester at farm 8527 to operate with the existing freeboard. For
proposed digester at farm 8529 this allows the top of dike and freeboard to be the same as the
exiting lagoons. This allows equalization of the lagoons if necessary, during large storm events,
which mitigates risk.
2. Stormwater Outlet — Please provide a typical detail for outlet for stormwater removed from digester
covers. Please also indicate stormwater outlet location(s) for each digester.
The stormwater removal outlet locations have been added to the site plan(s) and a detail of the outlet
added to construction plan set.
3. Biogas Use as a Renewable Energy Resource — Please provide information for the intended onsite
and/or offsite use of the biogas. Please include expected timeline regarding completion of digester
system and utilization of gas as a renewable energy resource.
The biogas produced at the site will be cleaned on -site to pipeline quality and trucked to a natural gas
pipeline insertion point off -site to be used as renewable natural gas. The anticipated digester
completion is Q2 2023 with utilization of the gas in Q4 2023.
4. Gas Generation Estimate — Please submit an estimate for the daily volume of biogas to be generated
by the proposed Digester.
The estimated total annual RNG generated at this facility is 52,840 dekatherms. The annual average
daily RNG produced from each digester would be +/-72 dekatherms (50 scfm)
5. Emergency Flare — Please provide location/identification for the emergency flare(s).
An emergency vent/flare connection location has been added to the site plans along with an updated
detail. The plan is to us a mobile/moveable "candle stick" flare that will be kept on -site for use on an
as needed basis for both digesters.
6. Slam Gate/Secondary Containment — Please indicate location of new slam gates/secondary
containment associated with proposed digesters, if applicable.
Per the site visit discussion, a secondary containment with valve has been added at the Farm 8529
digester adjacent to the level control station.
7. Influent/Effluent Sampling — Please indicate location for sampling of influent to and effluent from each
digester.
At Farm 8529 the influent sample(s) will be taken at the farm lift station(s) and the Effluent sample at
the digester level control station.
At Farm 8527 the influent sample(s) will be taken from the gravity pipeline clean -out nearest the
digester and the Effluent sample at the digester level control station.

• Page 3 January 3, 2023
8. Odor Control Checklist — The Odor Control Checklist was not included in the application. Please
provide as a required component of the CAWMP. Please use the updated form, attached.
See attached Swine 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.
See attached Swine Insect Control Checklist
10. Mortality Management Checklist — The Mortality Management Checklist was not included in the
application. Please provide as a required component of the CAWMP.
See attached Swine 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.
See attached Swine Emergency Action Plan
12. Sludge Survey — Please provide a copy of the most recent sludge survey for the existing Primary
Lagoon at Farm 27 (proposed Digester Cell 1).
See attached sludge survey for 2022. It is planned that approximately 2-3 feet of sludge from the
8527 primary will be removed and transferred into the new digester at Farm 8529. After transfer a
new sludge survey will be preformed for the 8527 primary.
13. Land application — Fields A, B, C, D, and E meet land application setback requirements; however,
these fields are near the road/neighbors. Please provide any information regarding additional BMPs
(example hose -drag vs travelling gun) in these areas used to improve protections and further reduce
risk of off -site impacts.
Land application BMP's:
• Fields A & B: Land Application by Airway application
• Fields C & D: Land Application by Airway application
• Field E: Land Application by Airway application
14. 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.
A determination of non -applicability was issued by NCDAQ on February 22,2022. Applicability
Determination No. 3758.

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Mortality Management Methods
lWicate which method(s) will be rmplemenled.
When selectingmultiple meihWs indc,ate a prrmary versus secondmry opts.:
Methods other than those listed must be approved by the State Vetennanan.
�ondarf Routine Mortality
Banal three feet beneath the surface of the ground wrthrn 24 hours of knowfedge of anirnal
death, The burial must be at fast 300 Feet from any fbwing stream or public body of water
(G S.106-403). The bottom of the budal pd should he at least one foot above the seasonal
high water table. Attach banal location map and pion
Landfill at municipal solid waste facility permuted by NC DEQ under GS 15A NCAC
13B 0200.
10 Rendering at a rendenng plant licensed under G S 106-168 l
Complete incineration according to 42 h1CAC 52C 0102.
composting system approved and permitted by the NC Department of Agnculture & Con-
sumer Services Veterinary i sion (attach copy of permit). If compost is distributed off -farm,
additional requirements must he met and a permit is required from NC DE .
In the case of dead poultry only, plactng In a disposal pit of a size and design approvedby the
epar rent of Aciric ufture & Consumer S a 10 - 4 * 0)�
Any method which, in the profes!5iu gal opinion of the State I etennana . would make possible
the salvage of part of a dead anima: s value wrthout endangering human or animal health
(Written approval by the State V t rinanan must be attached).
Mays Mortality Plan
Mass mortality plans are required for farms covered by an t PDES permit. Thee plans are
also recommended for all animal operations This plan ou`lirie farrin-specrfic moftality mares
agement methods to be used for mass mortality. The D Vetennary Do von sup-
porls a variety of emergency mortality dose sa, options contact the Di ion for quidance.,
catastrophic mortality disposal plan is part of the facility's P and is activated
when numbers f dead animals exceed normal mortality rates as specrfied by the Slate
Velerinarian .
• Bunal mist be done in accordance with NC General Statutes and NCDA&CS Veterinary
Division regulations and guidance
• Mass banal sites are subject to additional permit conditions (refer to facildy's animal
waste management system permit)
■ In the event of imminent threat of a disease emergency, the State Vetennanan may enact
addiWnal t parary p edures or measures for, disposal accard:ng to G S 106-399 4
0/ 17
Signature of Farm'QwnerJManagei ` f Date
Signature of Technical Specialtst
Date

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URF�
Steven W. Trier
Mr. R. O. Britt
Murphy -Brown LLC
434 East Main Street
PO Box 434
Waverly,
office
North Carolina Department of Agriculture
and Consumer Services
VA 23890 804-834-2109
Swine Fenn 911 Address: Farm
#29
422 Barrow Trail
Garysburg, NC 27831
Northampton County
Composter Permit # 13 - 1013
Dear Mr. Britt:
Veterinary Division
January 16, 2015
Swine Farm 911 Address:
Harm #30 (Composter Location)
732 Barrow Trail
Garysburg, NC 27831
Northampton County
Composter Permit # 15 - 1012
Swine. Farm 911 Address:
Farm 428
298 Gilt Lane
Garysburg, NC 27831
Northampton County
Composter Permit t1 15 - 1014
Rt Douglas Mocker, DVM
Swine Farm 911 Address:
Farm 427
684 Gift Lane
Garysburg, NC 27831
Northampton County
Composter Permit # 15 VV
1015
Pursuant to N C A C 5 2C.0102, your request to compost swine morality an your premises at 732 Barrow
Trail, Garysburg, NC'I'n Northampton County is approved, The approval is gTanted under the following
conditions and stipulations:
1. AID North Carnfina solid waste, air, water quality, and other applicable regulations mint be met in
siting and operation of the system
2. only poultry or swine are to be processed in this facility; NO bovine, caprine, ovim or Gervid
species shall be processed
3. Mortality to be processed shall originate only from the identified premises and the finished
product is used safely on agricultural operations owned, operated, or leased, by the permitce
Q. The final product of the process must be stared, treated and utilized in accordance with all federal,
state, and local laws, regulations, and pe it requirements; the final product shad not be sold
S. Temperatures steal[ be within MRCS guidelines to reach a minimum of 131 degrees F witt�m S
days of filling the unit and amain at least at 131 degrecs F for a minimum of S consecutive days
to maintain the composting process and reduce pathogen load
6. Dyad animals arc not to be removed from composting until -till flesh, intcmal organs, and ether soft
4;
tissue erc fully decomposed
7. The proposed facility shell have the following g]jnimum setback requirements:
1030 Mail Servlca Cenlac, Rplalph, North Carzl no 27699•1030 0 [phone]
M Equol QppcnunAy Affrrnsilyd Ad Ion Emaioyir

• 100-foot buffer betwccn all property lines and compost tUcas
• 100-foot buffer between all wells and compost areas, except for monitoring wills
• 504oul buffer between perennial streams/rivers and compost areas
S. A copy o!`the pe it, plans, and operationel reports shad be inwntaincd ari site and be available
ul)an request by NCDA&CS, Vcterinary Division personnel
9.6 The facility and operational regards shall be available for annual inspection by Veterinary
If Ir
Division personnel and shyl bc sent to the Veterinary Division upon request
10. Opemficnal reports shah include temperature monitoring during init"lal facility se.art-up and follow-
up records that contain either 10 days/monfli or annul laboratory results of pathogen load testing
I L An application for e pellil't modification shall be required for char��cs in Facility ownership, an
increasein facifity capacity, or any oUier changes from the stipulations of this permit
12. in the event that movement of carcasses from the premises of origin to the compost facility on
another premiscs is specifically permitted by NCDA&CS, die owner must comply with condiUnns
in GS 106-168.8 (5) and (6) followed by licensed renderers: 'The carcasses must he transported
within 24 hours of death in a leak-proo!`vessel or vehicle with a cover, to prevent spread of
disease by flips or other agents during the transportation. Friar to movement from the premises of
origin, the vessel or leak -proof container or vehicle containing die caresses must be disinfected
following loading of carcasses, to prevent the 5piC8d of disease, Following unlond1ng at the
compvs#tr, the vehicle or vessel must be cleaned and disinfected prior to leaving the compasier
prernises. The person loading and transporting the carcasses must wear ribber boots and suitable
protective clothing. The bets must be disinfected prior to entering the premises with carcasses to
be moved, as well as after unloading carcasses at the compost facility, prior to leaving Oiat
premises or cntcrin� a public �rca. Contaminated protecti�� clothir�b must be discarded or
removed and safely disposcd of to prevent carrying disease orgaausms away from the farm of
origin or the compost facility.
13. The Veterinary DIvision must be irmmediately riatified of any complicating issues involving
animal disease or enVtronmenW concerns
14MThe State Velc6narian reserves the right to cancel this permit if A specific concem for controlling
animal disease arises, or if any of the aforementioned conditions are not met.
This document shah in no circumstances be'lnteMreled as an endorsement of any specific manufacturer or
type of mar#,ality management system by the State Velefinan'an aiid the Office of die State Veterinarian
does nvt approve or disapprove the technical or perf ance standards for specific makes or designs of
equipment.
*Additional requirements and regulations will apply from DENR, Division of Solid Waste Management if
application for off -farm dispositioni of composted r�}atcrial s requested(see G.S. 13DA-309.29 and 15A
NCAC 13B, Section. 1400
Sincerely,
i
A
Dr. Carol Woodlicf, DVM
Interim Director of Animal Health Program slLi vesto ck
c: Dr. R. Douglas Mecke..%. State Veterinarian
Dr. Sarah .Meson, Director, AHP-Poultry

�r
9 -7 -30
3 60
EMERGENCY ACTION PLAN
PHONE NUMBERS
DIVISION OF WATER QUALITY (DWQ)
EMERGENCY MANAGEMENT SERVICES (EMS)
SOIL AND WATER CONSERVATION DISTRICT (SWCD)
NATURAL RESOURCES CONSERVATION SERVICE (NRCS)
COOPERATIVE EXTENSION SERVICE (GES)
919-791-4200
911
252-534-2591
252-534-2591
252-534-2831
31
SI
This plan will he implemented in the event that wastes from your operation are leaking,
overflowing of gunning off site. You should not wait until wastes reach surface waters or
heave your property to consider that you have a roble Yo should make every eff.-ort
to ensure that this does not happen. This P:an should be posted in an accessible
location for all employees at the facility. The following are some action items you should
take.
Stop the release ofwastes. Depending on the situation, this may or may not be possible. Suggested
respon5ea to some possible problems are listed below,
A. Lagoa overflow - passible solutions are;
a) Add soil to berm to increase elevation of dam.
by Pump wastes to fields at an acceptable rate.
c} Stop all flaw to the lagoon immediately.
d} Call a pumping contractor.
ej Make sure no surface water is entering lagoon.
Runoff from waste application field-acfions in ludw.
a) Immedlately stop waste. applicaton.
b) Create temporary diversion to contain waste*
C) Incorporate waste to reduce runoff.
d) Evaluate and eliminate the reason(s) that cause the runt.
e) Evaluate the application rates for the fielft where runoff occurred.
C. Leakage from the waste pipes and sprInklers - action Include:
8 Stop recycle pump.
b Stop i ation pump.
C) Close valves to eliminate finer d's ar e.
d Repair all leaks pr1or to restarting pumps.
D. Leakage from flush systems, houses, solid saparaiors -action include:
a} Stop recycle pump.
bj Stop irrigation pump.
c) Make pure siphon occurs.
dj Stop all flow in the house, flush systems, or solid separators.
E. Lpakage from base or sldewa"I of lagoon often this is seepage as apposed to flowing leaks -
poss(ble acation:
�) Did a small sump or ditch from the embankment to catch all seepage, put in a submersible
pump, and pump back to lagoon.
b) If hales are caused by burrowing animals, trap or remove anlmals and fill holes and
compact with e clay type soli.
t) Have a professional evaluate the condition of the side walls and the lagoon bottom as
soon as possible.
1 1 19r2ao8

3
2 Assess the extent of the spill and note any obv:ous damages.
a Did the waste reach surface waters?
b. Approximately how much was released and for what duratioO
c Any damage rotes, such as employes injury, fish kills, or property damage?
d. Did the spill leave the property?
e. Does the spill have the potential to reach surface wa1ers7
f Could a future rain event pause the spill to reach surface waters?
g Are potable water wills in danger (either on or off the property)?
h How much reached aurlace waters?
Contact appropnate agencies.
Dudng normal business hours call your DWO regional oboe; Phone , After hours,
emergencyn urnberg 1) 7 _ 94. Your phone call should include, your name,
facility number* telephone number, the details of the incident from item 2 above, the
ey.act location of the facility, the location or direction of the movement of the spill, weather
and grind condihons. The correchve measures that have been under taken, and the
seriousness of the s 1tuado r .
b. If the spUl I -eaves property or eaters surface wafers, call local EMS phone nu m be.r..
. Instruct EMS to contact kcal Health Department
Contactd. E's hone number, local S D office phone n u m beA and the local NRCS
office for advice I technical assistance phone number,
4. if none o If the above works call 11 c>r the Sheriffs Department and explain your problem to
therm and ask the person to contact the proper agencies for cu`
A
Contact the contractor of your claice to begin repair or problem to minimize offsite damage
a- Contractors Name-
b. Contractors Address.
d.
c . Contractors Phone..
Munphy Brows LL
R i Bob,.856. Warsaw, NC 28398
(9110 44
ConLact the technical specialist rho certified the lagoon (NRCS, ons lting Engineer-, etc.)
. Name, r i esterbee
b.. Phone. 1 i 533Q
7 implement procedures as advised by DV1Jp and techndcai 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.
1008

Smithfield
CJood food. �RespoKsib[8
Sonar Sludge Survey Reporting Form
Farm or Permit Number:
Lagoon I.D. Number:
Person taking measurements:
Date of Measurements:
Methods/Devices used for measurement of:
Number of measurement data points:
Staff
Sonar
Distance from the present liquid level to the top of sludge:
A. Start Pump Level:
B. Stop Pump Level:
C. Current Freeboard Level:
D. 1/2 Treatment Level:
E. Average Sludge Level:
If pump intake level is <2.5 ft a plan of action is required.
If value for E is greater than D then sludge levels are in Compliance.
AWS660030
If value for E is equal to or less than D then a Plan of Action is required.
Volume of sludge to be removed to reach compliance
Completed by: Dylan Carden
Print Name
Retention: 5 years
SignajAfre
8527
12/8/2022
-340
.3:304eet
19.08 inches
60.00 inches
73 inches
111.96 inches
112.60 inches
N/A feet
In Compliance Gallons
In Compliance Dry Tons
I Z/19��L
Date
Original: 5/21/19

**********New Lagoon Started**************
3632.641
7736.293
1.3
Date
3632.64
7736.295
1.2
Lagoon
3632.64
7736.296
1.4
Freeboard
3632.64
7736.298
1.4
Dist. To Sludge
3632.639
7736.299
1.4
Pump Intake
3632.639
7736.299
1.3
3632.638
7736.302
1.3
3632.638
7736.304
1.1
3632.637
7736.305
1.2
3632.637
7736.307
1.2
3632.637
7736.308
1.1
3632.637
7736.308
1.5
3632.636
7736.31
3.2
3632.636
7736.312
1.3
3632.636
7736.313
1.7
3632.635
7736.314
1.5
3632.635
7736.315
1.6
3632.635
7736.315
1.6
3632.633
7736.316
1.5
3632.633
7736.316
1
3632.632
7736.317
1
3632.631
7736.318
1.1
3632.631
7736.318
1.4
3632.631
7736.318
1.4
3632.63
7736.319
1
3632.63
7736.321
1.3
3632.63
7736.322
1.4
3632.63
7736.323
1.5
3632.629
7736.324
1.5
3632.629
7736.325
1.3
3632.628
7736.325
1.2
3632.628
7736.326
1.3
3632.627
7736.326
1.3
3632.626
7736.326
1.5
3632.626
7736.326
1.2
3632.626
7736.326
1.7
3632.625
7736.324
1.1
3632.625
7736.323
1.3
3632.625
7736.322
1.2
3632.625
7736.322
1.2
3632.625
7736.32
1.2
3632.625
7736.319
1.1
3632.625
7736.319
1.2
3632.626
7736.317
1.2
3632.626
7736.317
1.2
3632.626
7736.316
3.8
12/8/2022
27p
73 inches
2.803550296 0.5 3.30355
N/A

3632.626
7736.315
3.8
3632.626
7736.314
3.7
3632.626
7736.313
4.7
3632.626
7736.312
4.2
3632.626
7736.311
3.6
3632.626
7736.31
4.1
3632.626
7736.309
3
3632.626
7736.308
1.7
3632.626
7736.307
4.1
3632.626
7736.307
3.5
3632.627
7736.306
3.4
3632.627
7736.305
3.9
3632.627
7736.304
4.4
3632.627
7736.304
4.3
3632.627
7736.303
3.1
3632.627
7736.301
3.8
3632.627
7736.301
4.1
3632.627
7736.3
3.5
3632.627
7736.299
3.8
3632.627
7736.299
2.4
3632.627
7736.298
4.4
3632.627
7736.298
4.4
3632.627
7736.298
4.4
3632.627
7736.297
4.5
3632.627
7736.297
4.5
3632.628
7736.297
4.1
3632.628
7736.296
4.1
3632.628
7736.296
3.7
3632.628
7736.296
4.3
3632.628
7736.295
3.8
3632.628
7736.295
3.4
3632.628
7736.294
5
3632.628
7736.294
3.6
3632.629
7736.294
2.9
3632.629
7736.293
4.4
3632.629
7736.293
4.2
3632.63
7736.292
3.5
3632.63
7736.291
3.9
3632.63
7736.29
3.8
3632.63
7736.29
3.3
3632.629
7736.288
2.7
3632.629
7736.287
4.5
3632.629
7736.286
3.8
3632.628
7736.285
1.1
3632.628
7736.284
4
3632.627
7736.284
3.8
3632.627
7736.283
3.4

3632.626
7736.283
1.1
3632.625
7736.282
1.1
3632.625
7736.282
1.3
3632.624
7736.282
2.9
3632.623
7736.282
3.4
3632.622
7736.282
3.8
3632.621
7736.283
4.1
3632.62
7736.283
1.5
3632.62
7736.283
3.4
3632.619
7736.283
3.3
3632.619
7736.283
3.5
3632.617
7736.282
1.3
3632.617
7736.281
1.2
3632.617
7736.281
3.8
3632.617
7736.28
3.2
3632.616
7736.279
3.2
3632.615
7736.279
3.6
3632.614
7736.279
3.7
3632.613
7736.28
3.7
3632.613
7736.28
3.2
3632.613
7736.28
3.8
3632.612
7736.282
4.2
3632.611
7736.282
3.2
3632.611
7736.283
3.1
3632.611
7736.284
3.2
3632.61
7736.285
3.5
3632.61
7736.286
4.1
3632.609
7736.287
4.3
3632.609
7736.287
3.9
3632.609
7736.288
3.9
3632.609
7736.288
3.2
3632.608
7736.29
3.6
3632.608
7736.29
3.5
3632.608
7736.291
4.2
3632.608
7736.291
4.2
3632.608
7736.293
4.2
3632.608
7736.294
4.8
3632.608
7736.294
3.8
3632.608
7736.295
3.2
3632.608
7736.297
3.2
3632.608
7736.298
3.9
3632.608
7736.299
4.5
3632.608
7736.299
1.3
3632.607
7736.301
1.3
3632.607
7736.301
1.6
3632.607
7736.302
1
3632.607
7736.303
2.8

3632.606
7736.305
2.8
3632.606
7736.306
2.8
3632.606
7736.307
2.9
3632.606
7736.307
3.2
3632.606
7736.308
2.5
3632.605
7736.309
2.6
3632.605
7736.31
2.5
3632.604
7736.311
2.2
3632.604
7736.312
2.5
3632.604
7736.313
1.6
3632.603
7736.314
1.5
3632.603
7736.315
1.5
3632.602
7736.315
1.2
3632.602
7736.316
2.9
3632.601
7736.317
3.5
3632.6
7736.318
3.7
3632.6
7736.319
3.6
3632.599
7736.319
3.5
3632.598
7736.32
3.5
3632.598
7736.321
3.6
3632.597
7736.321
2.5
3632.596
7736.321
4
3632.595
7736.321
3.7
3632.595
7736.321
3.4
3632.594
7736.321
2.9
3632.593
7736.321
3.3
3632.592
7736.321
3.5
3632.591
7736.321
3.3
3632.59
7736.321
4.3
3632.59
7736.321
1.3
3632.589
7736.321
1.8
3632.588
7736.321
1.3
3632.587
7736.32
1.4
3632.587
7736.32
1.5
3632.586
7736.319
1.4
3632.585
7736.318
1.2
3632.585
7736.318
1.4
3632.584
7736.317
1.5
3632.584
7736.316
1.5
3632.584
7736.315
1.6
3632.583
7736.314
1.6
3632.583
7736.313
1.1
3632.583
7736.312
1
3632.583
7736.311
3.8
3632.583
7736.31
3.2
3632.583
7736.309
3.4
3632.583
7736.308
3.5

3632.583
7736.307
3.1
3632.583
7736.306
4.3
3632.583
7736.305
1.2
3632.582
7736.304
3.4
3632.582
7736.303
3.4
3632.582
7736.302
3.3
3632.582
7736.301
3.8
3632.581
7736.3
3.8
3632.581
7736.299
4
3632.581
7736.298
4.9
3632.58
7736.297
5.4
3632.58
7736.297
6
3632.58
7736.296
3.8
3632.58
7736.295
3.8
3632.58
7736.294
3.8
3632.58
7736.294
5.4
3632.581
7736.293
5.4
3632.582
7736.293
3.3
3632.582
7736.293
4
3632.583
7736.293
3.3
3632.584
7736.292
3.3
3632.585
7736.292
3.8
3632.585
7736.292
3
3632.586
7736.292
4
3632.587
7736.293
3.6
3632.587
7736.293
3.7
3632.588
7736.293
1.1
3632.589
7736.294
1.2
3632.589
7736.294
1.1
3632.59
7736.294
3.2
3632.59
7736.295
3.6
3632.591
7736.296
1.3
3632.592
7736.296
1.3
3632.593
7736.297
1.4
3632.594
7736.297
1.3
3632.595
7736.297
1.2
3632.595
7736.296
1.6
3632.596
7736.296
1.4
3632.597
7736.296
1
3632.597
7736.296
1.1
3632.598
7736.296
3.7
3632.599
7736.296
3.2
3632.6
7736.296
3.4
3632.6
7736.297
3.8
3632.601
7736.297
3.7
3632.602
7736.297
3.5
3632.603
7736.297
3.5

3632.603
7736.297
3.5
3632.604
7736.297
1.1
3632.605
7736.298
1.3
3632.605
7736.298
3.6
3632.606
7736.298
3.6
3632.606
7736.298
3.7
3632.607
7736.298
4.5
3632.607
7736.298
3.4
3632.608
7736.298
3.8
3632.608
7736.298
4.4
3632.609
7736.298
4.4
3632.609
7736.298
4
3632.61
7736.298
3.1
3632.61
7736.298
4.2
3632.611
7736.298
3.5
3632.612
7736.298
4.1
3632.612
7736.298
3.5
3632.613
7736.298
3.4
3632.614
7736.298
3
3632.614
7736.298
1
3632.615
7736.298
1.5
3632.615
7736.298
1
3632.616
7736.298
3
3632.617
7736.298
3.5
3632.617
7736.298
3
3632.618
7736.298
3.3
3632.618
7736.298
3.9
3632.619
7736.298
3.5
3632.619
7736.298
3.3
3632.62
7736.298
3.5
3632.62
7736.298
3.5
3632.621
7736.298
5
3632.621
7736.298
4.6
3632.621
7736.298
2.9
3632.622
7736.298
3.5
3632.622
7736.298
3.7
3632.623
7736.297
3.8
3632.623
7736.297
5
3632.624
7736.297
3.7
3632.624
7736.297
3.5
3632.625
7736.297
4.5
3632.625
7736.297
4
3632.625
7736.297
3.2
3632.626
7736.297
4.6
3632.626
7736.297
3.2
3632.626
7736.297
4.1
3632.626
7736.296
3.4

3632.626
7736.296
3.4
3632.627
7736.295
3.4
3632.627
7736.295
0
3632.627
7736.295
0
3632.627
7736.295
0
3632.627
7736.294
0
3632.627
7736.294
0
3632.627
7736.294
3.4
3632.627
7736.294
0
3632.628
7736.294
4
3632.628
7736.294
4.4
3632.628
7736.294
4.8
3632.629
7736.294
5.4
3632.629
7736.293
3.7
3632.63
7736.293
3.7
3632.631
7736.292
1.2
3632.631
7736.291
1.2
3632.632
7736.291
4.3
3632.633
7736.292
3.9
3632.633
7736.292
3.3
3632.634
7736.292
3.6
3632.634
7736.292
4.3
3632.635
7736.292
4.4
3632.635
7736.292
3.4
3632.635
7736.292
4.1
3632.636
7736.293
3
3632.636
7736.293
3.4
3632.637
7736.293
3.4
3632.638
7736.293
3.7
3632.638
7736.293
1.4
3632.639
7736.293
1.4
3632.64
7736.293
1.1
3632.64
7736.292
1.4
3632.641
7736.291
1.2
3632.641
7736.29
1.4
3632.641
7736.289
1.5
3632.641
7736.288
1.3
3632.641
7736.287
1.4
3632.642
7736.286
1.3
3632.642
7736.285
1.6
3632.642
7736.284
1.5
3632.642
7736.283
1.6
3632.642
7736.282
1.4
3632.642
7736.282
1.5
3632.642
7736.281
1.2
3632.642
7736.28
1.3
3632.642
7736.28
1.2

3632.643
7736.28
1.8
3632.643
7736.28
1.6
3632.643
7736.28
3.9
3632.644
7736.28
3.9
3632.644
7736.28
1.3
3632.644
7736.28
1.1
3632.645
7736.28
1
3632.645
7736.28
1
3632.646
7736.28
1.1
3632.646
7736.279
5.3

Facility Number: 66-0030
Grower: Gaston Farm 8527 Primary Designed By: JEO
Address: PO Box 1240 Checked By: DSE
Waverly, VA 23890 Date: 01/03/23
County: Northampon, NC Sheet 1 of 12
ANAEROBIC DIGESTER DESIGN
FARM INFORMATION
Farm Population:
Nursery:
Wean to Finish:
Finishing:
Farrow to weanling:
Farrow to feeder:
Farrow to finish:
Boars:
25 Yr. / 24 Hr Storm Event
Recycle Flush Water Volume:
DIGESTER INFORMATION
Is Digester Designed as an Irregular Shape? (YIN) ------------ Y
Was This Facility Built Prior to 9/96? (Y/N)------------ Y
Is Drain Tile Req'd to Lower SHWT? (Y/N)------------ N
Seasonal High Water Table Elev: -------------------
Freeboard:-------------------
0
24642 Hd.
0
0
0
0
0
6.7 In.
126.00 Ft.
1.0 Ft.
Side Slopes:
-------------------
3 :1 (H:V)
495.0
Ft.
377.0
Ft.
Top of Dike Elevation:
---------------- Depth
136.30
Ft.
Finished Bottom Elevation:
BOTTOM E 14.76 Ft.
121.54
Ft.
Start Pump Elevation:
---------------- 19.08 In.
134.71
Ft.
Stop Pump Elevation:
---------------- 27.00 In.
134.05
Ft.
Top of Sludge Elevation:
---------------- 135.6 In.
125.00
Ft.
DIGESTER VOLUMES REQUIRED VOL.
Storm Temp= 105174 (Cu.Ft.)
Temporary = 0 (Cu.Ft.)
Operational = 1355310 (Cu.Ft.)
Permanent Sludge 0 (Cu.Ft.)
Total Volume = 1,460,484 (Cu.Ft.)
Lagoon Surface Area: (Inside TOD)
DESIGN VOLUMES
106,292
(Cu.Ft.)
117,129
(Cu.Ft.)
1,412,312
(Cu.Ft.)
407,593
(Cu.Ft.)
2,043,327 (Cu.Ft.)
% REQ'D.
101.06%
8.64%
104.21 %
139.91 %
188,372 S.F.
Smithfield Nog Production Engineering P.O. Box 856, Warsaw, NC 28398 [phone]

aci ity Number: 66-0030
Grower: Gaston Farm 8527 Primary Designed By: JEO
Address: PO Box 1240 Checked By: DSE
Waverly, VA 23890 Date: 01/03/23
County: Northampon, NC Sheet 2 of 12
ACTUAL DESIGN VOLUME CALCULATIONS
BASE VOLUME: ©Cu. Ft.
DIGESTER
STAGE -AREA VOLUMES
Contour
Elevation (FT.)
Area SF Incr. Vol. (Cu. FT}
Cumul. Vol. (Cu. FT
123.54
128,451
214,515
124.00
130,937
59,659
274,174
125.00
135,900
133,419
407,593
126.00
140,368
138,134
545,727
127.00
144,850
142,609
688,336
128.00
149,437
147,143
835,479
129.00
154,114
151,775
987,255
130.00
158,548
156,331
1,143,585
131.00
162,667
160.607
1,304,193
132.00
166,821
164,744
1,468,936
133.00
171,033
168,927
1,637,863
134.00
175,304
173,169
1,811,032
135.00
179,634
177,469
1,988,501
136.00
185,875
182,754
2,171,255
136.30
188,372
56,137
2,227,392
These volumes were calculated using the vertical average end area method
TOTAL REQD VOL 1,460,484
CF
CUMULATIVE
VOL.
ZONE VOL.
139.91%
END PUMP = = = = 134.05
FT
1,819,905 CF
TR'MT
1,412,312
104.21 %
START PUMP = =: 134.71
FT
1,937,035 CF
TEMP
117,129
8.64%
MAX STORAGE = 135.30
FT
2,043,327 CF
STORM
106,292
101.06%
Smithfield Hog Production Engineering P.O. Box 856, Warsaw, NC 28398 [phone]

Grower: Gaston Farm econ ary Designed y: JEO
Address: PO Box 1240 Checked By: DSE
Waverly, VA 23890 Date: 01/03/23
County: Northampon, NC Sheet 3 of 12
WASTE STORAGE POND DESIGN 2nd STAGE
FARM INFORMATION
Farm Population:
Nursery: -------------------
0
Wean to Finish: -------------------
24642 Hd.
Finishing: -------------------
0
Farrow to weanling:-------------------
0
Farrow to feeder: -------------------
0
Farrow to finish: -------------------
0
Boars: -------------------
0
Storage Period: -------------------
180 Days
25 Yr. / 24 Hr Storm Event -------------------
6.7 In.
"Heavy Rain" Factor Not Applicable Even if Value Shown
Rainfall in Excess of Evaporation -------------------
7 In.
Additional Water Usage: -------------------
0
Additional Drainage Area: -------------------
0
STORAGE INFORMATION
Is Storage Pond Designed as an Irregular Shape? (Y/N)------------
Y
Does Operator Want Emergency Spillway?
(Y/N)------------
N
Was This Design Built Prior to 9/96?
(Y/N)------------
Y
Is Drain Tile Req'd to Lower SHWT?
(Y/N)------------
N
Seasonal High Water Table Elev:
-------------------
126.00
Ft.
Freeboard:
-------------------
1.0
Ft.
Emergency Spillway Flow Depth:
Not Applicable Even if Value Shown
0
Side Slopes:
-------------------
3
:1 (H:V)
From Lagoon Volume Check Contours
0.0
contour areas see shPPt d of 12...
0.0
Top of Dike Elevation:
---------------- Depth
136.30
Ft.
Finished Bottom Elevation:
BOTTOM E 13.76 Ft.
122.54
Ft.
Start Pump Elevation:
---------------- 19.08 In.
134.71
Ft.
Stop Pump Elevation:
---------------- 99.6 In.
128.00
Ft.
CHECK
PUMPING ELEVATIONSM
STORAGE VOLUME REQUIRED VOL. DESIGN VOLUMES
% REQ'D.
Storm Stor = 50487
(Cu.Ft.) 50,486 (Cu.Ft.)
100.00%
Temporary = 744788
(Cu.Ft.) 507,711 (Cu.Ft.)
68.17%
Permanent = 0
(Cu.Ft.) 374,446 (Cu.Ft.)
Total Volume = 795,275
(Cu.Ft.) 932,642 (Cu.Ft.)
117.27%
90 Temporary Storage Volume Elevation = 130.31 Ft. 1 71.90 In.
Lagoon Surface Area: (Inside TOD)------------------- 90,424 S.F
Smithfield Hog Production Engineering P.O. Box 856 ,Warsaw, NC 28398 [phone]

Grower: Gaston Farm 8527 Secondary Designed By: JEO
Address: PO Box 1240 Checked By: DSE
Waverly, VA 23890 Date: 01/03/23
Countv: Northamr)on, NC Sheet 4 of 12
ACTUAL DESIGN VOLUME CALCULATIONS
BASE VOLUME: ®Cu. Ft.
STORAGE POND STAGE -AREA VOLUMES
Contour
Elevation (FT.)
Area (SF)
Incr. Vol. (Cu. FT
124.54
54,226
125.00
56,421
25,449
126.00
60,919
58,670
127.00
64,448
62,683
128.00
67,055
65,751
129.00
69,537
68,296
130.00
72,056
70,796
131.00
74,618
73,337
132.00
77,224
75,921
133.00
79,873
78,549
134.00
82,565
81,219
135.00
85,301
83,933
136.00
89,002
87,152
136.30
90,424
26,914
Cumul. Vol. (Cu. FTC
161,892
187,341
246,011
308,695
374,446
442,741
513,538
586,875
662,796
741,344
822,563
906,497
993,649
1,020,563
These volumes were calculated using the vertical average end area method.
TOTAL REQD VOL 1,460,484
CF
CUMULATIVE
VOL.
ZONE VOL. 117.27%
END PUMP = = = = 128.00
FT
374,446 CF
TR'MT
374,446
START PUMP = =: 134.71
FT
882,156 CF
TEMP
507,711 68.17%
MAX STORAGE = 135.30
FT
932,642 CF
STORM
50,486 100.00%
Smithfield Nog Production Engineering P.O. Sox 856 ,Warsaw, NC 28398 [phone]

Grower: Gaston Farm 8527 Primary Designed By: JEO
Address: PO Box 1240 Checked By: DSE
Waverly, VA 23890 Date: 01/03/23
County: Northampon, NC Sheet 5 of 12
MINIMUM REQUIRED VOLUME CALCULATIONS DIGESTER
Permanent Storage:
Required Treatment Volume:
Animal ype Capacity (cu.ft. hd) = Total
Nursery
0
1.00
0
Wean to Finish
24,642
55.00
1,355,310
Finishing
0
32.00
0
Farrow to weanling
0
1.00
0
Farrow to feeder
0
1.00
1 0
Farrow to finish
0
1.00
0
Boars
0
1.00
0
Total Required Treatment Volume (cu. ft.)= 1,355,310
Sludge Storage Volume:
Animal Type Capacity ALW (cu. t.11b) = Total
Nursery
0
30
0.00
0
Wean to Finish
24,642
115
0.00
0
Finishing
0
135
0.00
0
Farrow to weanling
0
433
0.00
0
Farrow to feeder
0
522
0.00
0
Farrow to finish
0
1,417
0.00
0
Boars
0
400
0.00
0
Total Required Sludge Storage Volume (cu. ft.)=
No Storm Storage Unless a Partial Cover Digester:
Vol.=(Digester Surf. Area + Addt'I Drainage Area) * 25Yr./24Hr. Storm(in) / 12in./ft.
Vol.= (188372 sq.ft + 0 sq.ft.) * 6.7 in. /12 in./ft.
Total Required Volume for 25Yr./24Hr. Storm Event (cu.ft)=
No "Heavy Rain" Storage Unless a Partial Cover Digester:
Vol.=(Digester Surf. Area + Addt'I Drainage Area) * "Heavy Rain" Factor (in) / 12in./ft.
Vol.= (188372 sq.ft + 0 sq.ft.) * 0.0 in. /12 in./ft.
Total Required Volume for "Heavy Rain" (cu.ft.) =
(for Extended Periods of Chronic Rainfall)
N
105,174
Total Required Storm Storage
(25Yr. / 24Hr. Storm +'Heavy Rain')= 105,174 (CU.FT)
Total Required Permanent Storage
(Treatment + Sludge) = 1,355,310 (CU.FT)
TOTAL REQUIRED DIGESTER VOLUME = 1460484 (CU.FT.)
Production
0
10) 293-3434

Grower: Gaston Farm 8527 Secondary Designed By: JEO
Address: PO Box 1240 Checked By: DSE
Waverly, VA 23890 Date: 01 /03/23
County: Northampon, NC Sheet 6 of 12
Temporary Storage Volume:
Manure Production:
IA-pimal Type Capacity Sto. Period=Total
Nursery
0
0
0.30
Wean to Finish
24,642
180
1.17
!'10
Finishing
0
180
1.37
Farrow to weanling
0
0
4.39
Farrow to feeder
0
0
5.30
1 0
Farrow to finish
0
0
114.38
1 0
Boars
0
0
1 4.06
0
Total Manure Production (gals.)= 5,176,463
Total Manure Production (cu.ft.)= 692,040
Excess Fresh Water:
jAnimal TypeCapacity' to. Period I ota
Nursery
0
0
0.00
0
Wean to Finish
24,642
180
0.00
0
Finishing
0
180
0.00
0
Farrow to weanling
0
0
0.00
0
Farrow to feeder
0
1 0
0.00
0
Farrow to finish
0
0
0.00
0
Boars
0
0
0.00
0
Total Fresh Water Excess (gals.)=
Total Fresh Water Excess (cu.ft.)=
Smithfield Hog
0
0
[phone]

Grower: Gaston Farm 8527 Secondary Designed By: JEO
Address: PO Box 1240 Checked By: DSE
Waverly, VA 23890 Date: 01/03/23
County: Northampon, NC Sheet 7 of 12
Temporary Storage Volume: Cont.
Rainfall in Excess of Evaporation: Only in Waste Storage Pond since digester is covered
Vol.=(Digester Surface Area + Waste Storage Pond Area + Additional Drainage Area) * Rainfall / 12in./ft
Vol.= (0.0 sq.ft. + 90424 sq.ft. + 0 sq.ft.) * 7.0 in. /12 in./ft.
Total Required Volume for Rainfall in Excess of Evap. (cu.ft.)= 52,747
Storm Storage: Only in Waste Storage Pond since digester is covered
Vol.=(Waste Storage Pond Area + Additional Drainage Are * 25Yr./24Hr Storm(in.)/12in./ft.
Vol.= (0.0 sq.ft. + 90424 sq.ft. + 0 sq.ft.) * 6.7 in. /12
Total Required Volume for 25Yr./24Hr. Storm Event (cu.ft)= 50,487
"Heavy Rain" Storage: Only in Waste Storage Pond when required since digester is covered
Vol.=(Waste Storage Pond Area + Additional Drainage Area) * = Heavy Rain Factor(in) / 12in./ft.
Vol.= (0.0 sq.ft. + 90424 sq.ft. + 0 sq.ft.) * 0.0 in. /12 in./ft.
Total Required Volume for "Heavy Rain" (cu.ft.) = 0
(for Extended Periods of Chronic Rainfall)
Additional Water Storage:
No Additional Water Storage is Required
0
Total Required Storm Storage
(25Yr. / 24Hr. Storm +'Heavy Rain')=
Total Required Temporary Storage
(Manure Prod. + Excess Fr. Water + Rainfall Excess + Additional Water Storage)=
Total Required Permanent Storage
(Treatment + Sludge) _
50,487 (CU.FT)
744,788 (CU.FT)
0 (CU.FT)
TOTAL REQUIRED 2nd STAGE VOLUME = 795275 (CU.FT.)
LVA
10) 293-3434
0

Grower: Gaston Farm 8527 Primary Designed By: JEO
Address: PO Box 1240 Checked By: DSE
Waverly, VA 23890 Date: 01/03/23
County: Northampon, NC Sheet 8 of 12
DIGESTER DESIGN SUMMARY
Top of Dike Elevation ------------------- 136.30 FT.
Top of 25Yr. / 24Hr. Storm Storage
135.30 FT.
Start Pump Elevation -------------------
134.71
FT.
End Pump Elevation -------------------
134.05
FT.
Top of Sludge Storage -------------------
125.00
FT.
Seasonal High Watertable Elev-------------------
126.00
FT.
Finished Bottom Elevation -------------------
121.54
FT.
Inside Top Length -------------------
Not
Applicable
Inside Top Width -------------------
Not
Applicable
Side Slopes -------------------
3.0:1
H:V
Lagoon Surface Area -------------------
188,372
SF
Freeboard Depth
Zone Depths:
TOTAL DESIGN VOLUME = 2043327 (CU.FT.)
Treatment / Sludge Storage Zone Depth
Temporary Storage Zone Depth
Freeboard Depth
Total Digester Depth
Smithfield Hog Production
1.00 FT.
12.5 FT.
0.7 FT.
1.6 FT.
14.8 FT.

Grower: Gaston Farm 8527 Secondary Designed By: JEO
Address: PO Box 1240 Checked By: DSE
Waverly, VA 23890 Date: 01 /03/23
County: Northampon, NC Sheet 9 of 12
STORAGE POND DESIGN SUMMARY 2nd STAGE
Top of Dike Elevation -------------------
136.30
FT.
Emergency Spillway Crest Elevation -------------------
Not
Applicable
Top of 25Yr. / 24Hr. Storm Storage -------------------
135.30
FT.
Top of "Heavy Rain" Storage -------------------
Not
Applicable
Start Pump Elevation -------------------
134.71
FT.
End Pump Elevation -------------------
128.00
FT.
Top of Sludge Storage -------------------
Not
Applicable
Seasonal High Watertable Elev-------------------
126.00
FT.
Finished Bottom Elevation -------------------
122.54
FT.
Inside Top Length -------------------
Not
Applicable
Inside Top Width -------------------
Not
Applicable
Side Slopes -------------------
3.0:1
H:V
Lagoon Surface Area -------------------
90,424
SF
Freeboard Depth
Temporary Storage Period
Zone Depths:
1.00 FT.
180 Days
TOTAL DESIGN VOLUME = 932642 (CU.FT.)
Treatment / Sludge Storage Zone Depth ----------- 5.5 FT.
Temporary Storage Zone Depth ----------- 6.7 FT.
Freeboard / Storm Storage Zone Depth ----------- 1.6 FT.
Total Storage Pond Depth ----------- 13.8 FT.
Smithfield Hop Production Enqineerinq P.O. Box 856, Warsaw NC 28398 [phone]

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Grower: Gaston Farm 8527 Primary Designed By: JEO
Address: PO Box 1240 Checked By: DSE
Waverly, VA 23890 Date: 01/03/23
County: Northampon, NC Sheet 12 of 12
This Anerobic Digester is designed in accordance with the North Carolina Natural Resources Conservation
Service PRACTICE STANDARD 366- ANEROBIC DIGESTER, revised in September, 2018.
The Waste Storage Pond is designed in accordance with the North Carolina Natural Resources Convservation
Service PRACTICE STANDARD 313- WASTE STORAGE FACILITY, revised in December, 2017
DESIGNED:
DATE: 01 /03/2023
COMMENTS: The lagoon has been designed as an irregular shape. Actual contour areas
taken from the lagoon design are used to calculate the surface area and storage volume
characteristics of the lagoon. This approach ensures that rainfall capture on the lagoon is
fully accounted for and that storage volumes calculated represent actual conditions.
Elevations are based on an assumed benchmark and do not represent mean sea level datum.
1 certify, to the best of my professional knowledge, judgement, and belief, this design calculation
is in accordance with the applicable NRCS standards.
Smithfield Hog Production Engineering P.O. Box 856, Warsaw NC 28398 [phone]

Facility Number: 66-0030
Grower: Gaston Farm 8529 Designed By: JEO
Address: PO Box 759 Checked By: DSE
Rose Hill, NC 28458 Date: 01/03/23
Countv: Bladen Sheet 1 of 12
ANAEROBIC DIGESTER DESIGN
FARM INFORMATION
Farm Population:
Nursery: ------------------- 0
Wean to Finish: ------------------- 24642 Hd.
Finishing: ------------------- 0
Farrow to weanling: 0
Farrow to feeder: ------------------- 0
Farrow to finish: ------------------- 0
Boars: ------------------- 0
25 Yr. / 24 Hr Storm Event ------------------- 6.7 In.
Recycle Flush Water Volume: ------------------- u
DIGESTER INFORMATION
Is Digester Designed as an Irregular Shape?
(Y/N)------------
Y
Was This Facility Built Prior to 9/96?
(Y/N)------------
N
Is Drain Tile Req'd to Lower SHWT?
(Y/N)------------
N
Seasonal High Water Table Elev:
-------------------
128.50
Ft.
Structural Freeboard:
-------------------
1.0
Ft.
Side Slopes:
-------------------
3
:1 (H:V)
From Lagoon
Volume Check Contours
630.0
Ft.
contour areas see shPPt 2 of 7...
260.0
Ft.
Top of Dike Elevation:
----------------
Depth
139.50
Ft.
Finished Bottom Elevation:
----------------
17.50 Ft.
122.00
Ft.
Start Pump Elevation:
----------------
19.08 In.
137.91
Ft.
Stop Pump Elevation:
----------------
26.00 In.
137.33
Ft.
Permanent Sludge Elevation:
----------------
156 In.
126.50
Ft.
DIGESTER VOLUMES REQUIRED VOL.
DESIGN VOLUMES
% REQ'D.
Freeboard = 91455
(Cu.Ft.)
93,047 (Cu.Ft.)
101.74%
Temporary = 0
(Cu.Ft.)
88,439 (Cu.Ft.)
6.53%
Operational = 1355310
(Cu.Ft.)
1,362,086 (Cu.Ft.)
100.50%
Sludge = 0
(Cu.Ft.)
282,436 (Cu.Ft.)
Total Volume = 1,355,310
(Cu.Ft.)
1,826,008 (Cu.Ft.)
134.73%
Lagoon Surface Area: (Inside TOD)
163,800 S.F.
Smithfield Hog Production Engineering P.O. Box 856, Warsaw, NC 28398 [phone]

Facility um ber: 66- 03
Grower: Gaston Farm 8529 Designed By: JEO
Address: PO Box 759 Checked By: DSE
Rose Hill, NC 28458 Date: 01/03/23
County: Bladen Sheet 2 of 12
ACTUAL DESIGN VOLUME CALCULATIONS
BASE VOLUME: Cu. Ft.
DIGESTER
STAGE -AREA VOLUMES
Contour
Elevation (FT.)
Area I� Incr.
Vol. (Cu. FT)
Cumul. Vol. Cu. FT
122.00
0
0
123.00
21,621
10,811
10,811
124.00
67,509
44,565
55,376
125.00
93,934
80,721
136,097
126.00
98,271
96,102
232,199
127.00
102,675
100,473
332,672
128.00
107,151
104,913
437,585
129.00
111,699
109,425
547,010
130.00
116,319
114,009
661,019
131.00
121,011
118,665
779,684
132.00
125,775
123,393
903,077
133.00
130,611
128,193
1,031,270
134.00
135,519
133,065
1,164,335
135.00
140,499
138,009
1,302,344
136.00
145,551
143,025
1,445,369
137.00
150,675
148,113
1,593,482
138.00
155,871
153,273
1,746,755
139.00
161,139
158,505
1,905,260
139.50
163,800
81,235
1,986,495
These volumes were calculated using the vertical average end area method.
TOTAL REQD VOL 1,355,310
CF
CUMULATIVE
VOL.
ZONE VOL.
134.73%
END PUMP = = = = 137.33
FT
1,644,522 CF
TR'MT
1,362,086
0.00%
START PUMP = = : 137.91
FT
1,732,961 CF
TEMP
88,439
100.50%
MAX STORAGE = 138.50
FT
1,826,008 CF
STORM
93,047
6.53%
Smithfield Hog Production Engineering P.O. Box 856, Warsaw, NC 28398 [phone]

rower: Gaston Farm 8029 Primary Designed By: JEU
Address: PO Box 759 Checked By: DSE
Rose Hill, NC 28458 Date: 01/03/23
County: Bladen Sheet 3 of 12
WASTE STORAGE POND DESIGN 2nd STAGE
FARM INFORMATION
Farm Pouulation:
Nursery: -------------------
0
Wean to Finish: -------------------
24642 Hd.
Finishing: -------------------
0
Farrow to weanling:-------------------
0
Farrow to feeder: -------------------
0
Farrow to finish: -------------------
0
Boars: -------------------
0
Storage Period: -------------------
Days
100 Yr. / 24 Hr Storm Event -------------------
6.7 In.
"Heavy Rain" Factor Not Applicable Even if Value Shown
0
Rainfall in Excess of Evaporation -------------------
7 In.
Additional Water Usage: -------------------
0
Additional Drainage Area: -------------------
0
STORAGE INFORMATION
Is Storage Pond Designed as an Irregular Shape? (Y/N)------------ Y
Does Operator Want Emergency Spillway?
(Y/N)------------ N
Was This Design Built Prior to 9/96?
(Y/N)------------ Y
Is Drain Tile Req'd to Lower SHWT?
(Y/N)------------ N
Seasonal High Water Table Elev:
-------------------
128.50
Ft.
Freeboard:
-------------------
1.0
Ft.
Emergency Spillway Flow Depth:
Not Applicable Even if Value Shown
0
Side Slopes:
-------------------
3
:1 (H:V)
From Lagoon Volume Check Contours
0.0
contour areas see shPP+ ? of 7...
0.0
Top of Dike Elevation:
---------------- Depth
137.59
Ft.
Finished Bottom Elevation:
BOTTOM E 12.21 Ft.
125.38
Ft.
Start Pump Elevation:
---------------- 19.08 In.
136.00
Ft.
Stop Pump Elevation:
---------------- 82.2 In.
130.74
Ft.
CHECK PUMPING ELEVATIONSM
STORAGE VOLUME REQUIRED VOL. DESIGN VOLUMES
Storm Stor = 103298 (Cu.Ft.) 106,408 (Cu.Ft.)
Temporary = 1254587 (Cu.Ft.) 880,644 (Cu.Ft.)
Permanent = 0 (Cu.Ft.) 722,102 (Cu.Ft.)
Total Volume = 1,357,884 (Cu.Ft.) 1,709,154 (Cu.Ft.)
90 Temporary Storage Volume Elevation = 132.68 Ft.
Lagoon Surface Area: (Inside TOD)
% REQ'D.
103.01 %
70.19%
125.87%
58.97 In.
185,011 S.F.
Smithfield Hog Production Engineering P.O. Box 856, Warsaw, NC 28398 [phone]

Grower: Gaston Farm 8029 Primary Designed By: JEO
Address: PO Box 759 Checked By: DSE
Rose Hill, NC 28458 Date: 01/03/23
County: Bladen Sheet 4 of 12
ACTUAL DESIGN VOLUME CALCULATIONS
BASE VOLUME: Cu. Ft.
STORAGE POND STAGE -AREA
VOLUMES
Contour
Elevation (FT.)
Area (SF)
Incr. Vol. (Cu. FT)
Cumul. Vol. (Cu. FT}
126.82
130,259
159,165
127.00
131,631
23,570
182,735
128.00
139,002
135,317
318,052
129.00
145,150
142,076
460,128
130.00
150,997
148,074
608,201
131.00
156,842
153,920
762,121
132.00
162,100
159,471
921,592
133.00
166,206
164,153
1,085,745
134.00
170,284
168,245
1,253,990
135.00
174,384
172,334
1,426,325
136.00
178,459
176,421
1,602, 746
13 7.00
182,248
180,303
1,783,099
137.82
185,011
150,576
1,933,675
These volumes were calculated using the vertical average end area method.
TOTAL REQD VOL 1,355,310
CF
CUMULATIVE
VOL.
ZONE VOL. 125.87%
END PUMP = = = = 130.74
FT
722,102 CF
TR'MT
722,102
START PUMP = =: 136.00
FT
1,602,746 CF
TEMP
880,644 70.19%
MAX STORAGE = 136.59
FT
1,709,154 CF
STORM
106,408 103.01%
Smithfield Hog Production Engineering P.O. Box 856, Warsaw, NC 28398 [phone]

Grower: Gaston Farm 8029 Designed By: JEO
Address: PO Box 759 Checked By: DSE
Rose Hill, NC 28458 Date: 01/03/23
County: Bladen Sheet 5 of 12
MINIMUM REQUIRED VOLUME CALCULATIONS DIGESTER
Permanent Storage:
Required Treatment Volume:
Animal Type Capacity (cu.ft./hd) = Total
Nursery
0
1.00
0
Wean to Finish
24,642
55.00
1,355,310
Finishing
0
55.00
0
Farrow to weanling
0
0.67
0
Farrow to feeder
0
0.67
0
Farrow to finish
0
1.00
0
Boars
0
0.50
0
Total Required Treatment Volume (cu. ft.)= 1,355,310
Sludge Storage Volume:
Animal Type Capacity ALW (cu.ft./lb) = Total
Nursery
0
30
0.25
0
Wean to Finish
24,642
115
0.00
0
Finishing
0
135
0.00
0
Farrow to weanling
0
433
0.17
0
Farrow to feeder
0
522
0.17
0
Farrow to finish
0
1,417
0.25
0
Boars
0
400
0.25
0
Total Required Sludge Storage Volume (cu. ft.)=
No Storm Storage Unless a Partial Cover Digester:
Vol.=(Digester Surf. Area + Addt'I Drainage Area) * 100Yr./24Hr. Storm(in) / 12in./ft.
Vol.= (163800 sq.ft + 0 sq.ft.) * 6.7 in. /12 in./ft.
Total Required Volume for 100Yr./24Hr. Storm Event (cu.ft)=
No "Heavy Rain" Storage Unless a Partial Cover Digester:
Vol.=(Digester Surf. Area + Addt'I Drainage Area) * "Heavy Rain" Factor (in) / 12in./ft.
Vol.= (163800 sq.ft + 0 sq.ft.) * 0.0 in. /12 in./ft.
Total Required Volume for "Heavy Rain" (cu.ft.) _
(for Extended Periods of Chronic Rainfall)
Total Required Storm Storage
(100Yr. / 24Hr. Storm +'Heavy Rain')=
Total Required Permanent Storage
(Treatment + Sludge) _
0
91,455
91,455 (CU.FT)
1,355,310 (CU.FT)
TOTAL REQUIRED DIGESTER VOLUME = 1446765 (CU.FT.)
Warsaw NC 28398
9
0

Grower: Gaston Farm 8029 Primary Designed By: JEO
Address: PO Box 759 Checked By: DSE
Rose Hill, NC 28458 Date: 01/03/23
Countv: Bladen Sheet 6 of 12
Temporary Storage Volume:
Manure Production:
nima ypeCapacity to. Period = Total
Nursery
0
0
0.30
0
Wean to Finish
24,642
180
1.17
5,176,299
Finishing
0
180
1.40
0
Farrow to weanling
0
0
4.30
0
Farrow to feeder
1 0
0
4.50
0
Farrow to finish
0
0
13.50
0
Boars
0
0
1 4.00
0
Excess Fresh Water:
Smithfield Hog
Total Manure Production (gals.)= 5,176,299
Total Manure Production (cu.ft.)= 692,019
Animal Type Capacity Sto. Period I ota
Nursery
0
0
0.20
0
Wean to Finish
24,642
180
0.77
3,400,744
Finishing
0
180
0.90
0
Farrow to weanling
0
0
2.90
0
Farrow to feeder
0
0
3.50
1 0
Farrow to finish
0
0
9.50
1 0
Boars
0
0
2.70
1 0
Total Fresh Water Excess (gals.)= 3,400,744
Total Fresh Water Excess (cu.ft.)= 454,645
W
10

Grower: Gaston Farm 8029 Primary
Address: PO Box 759
Rose Hill, NC 28458
County: Bladen
Temporary Stora a Volume: Cont.
Designed By: JEO
Checked By: DSE
Date:
Sheet 7 of 12
01 /03/23
Rainfall in Excess of Evaporation: Only in Waste Storage Pond since digester is covered
Vol.=(Digester Surface Area + Waste Storage Pond Area + Additional Drainage Area) * Rainfall / 12in./ft
Vol.= (0.0 sq.ft. + 185011 sq.ft. + 0 sq.ft.) * 7.0 in. /12 in./ft.
Total Required Volume for Rainfall in Excess of Evap. (cu.ft.)= 107,923
Storm Storage: Only in Waste Storage Pond since digester is covered
Vol.=(Digester Surface Area + Waste Storage Pond Area - * 100Yr./24Hr Storm(in.)/12in./ft.
Vol.= (0.0 sq.ft. + 185011 sq.ft. + 0 sq.ft.) * 6.7 in.
Total Required Volume for 100Yr./24Hr. Storm Event (cu.ft)= 103,298
"Heavy Rain" Storage: Only in Waste Storage Pond when required since digester is covered
=(Digester Surface Area + Waste Storage Pond Area + Additional Drainage Area) * Heavy Rain Factor(in) / 12in
Vol.= (0.0 sq.ft. + 185011 sq.ft. + 0 sq.ft.) * 0.0 in. /12 in./ft.
Total Required Volume for "Heavy Rain" (cu.ft.) = 0
(for Extended Periods of Chronic Rainfall)
Additional Water Storage:
No Additional Water Storage is Required
0
Total Required Storm Storage
(100Yr. / 24Hr. Storm + 'Heavy Rain')=
Total Required Temporary Storage
(Manure Prod. + Excess Fr. Water + Rainfall Excess + Additional Water Storage)=
Total Required Permanent Storage
(Treatment + Sludge) _
103,298 (CU.FT)
1,254,587 (CU.FT)
0 (CU.FT)
TOTAL REQUIRED 2nd STAGE VOLUME=1357884 (CU.FT.)
0

Grower: Gaston Farm 8029 Designed By: JEO
Address: PO Box 759 Checked By: DSE
Rose Hill, NC 28458 Date: 01/03/23
Countv: Bladen Sheet 8 of 12
Top of Dike Elevation
Top of 25Yr. / 241-1r. Storm Storage
Start Pump Elevation
End Pump Elevation
Top of Sludge Storage
Seasonal High Watertable Elev
Finished Bottom Elevation
Inside Top Length
Inside Top Width
Side Slopes
Lagoon Surface Area
Freeboard Depth
Zone Depths:
DIGESTER DESIGN SUMMARY
TOTAL DESIGN VOLUME = 1781723 (CU.FT.)
Treatment / Sludge Storage Zone Depth
Temporary Storage Zone Depth
Freeboard Depth
Total Digester Depth
Smithfield Hog Production
139.50 FT.
138.50 FT.
137.75 FT.
137.25 FT.
126.50 FT.
128.50 FT.
124.00 FT.
630.00 FT.
260.00 FT.
3.0:1 H:V
163,800 SF
1.00 FT
13.3 FT.
0.5 FT.
1.8 FT.
15.5 FT.
1

Grower: Gaston Farm 8029 Primary Designed By: JEO
Address: PO Box 759 Checked By: DSE
Rose Hill, NC 28458 Date: 01/03/23
Countv: Bladen Sheet 9 of 12
STORAGE POND DESIGN SUMMARY 2nd STAGE
Top of Dike Elevation -------------------
137.59
FT.
Emergency Spillway Crest Elevation -------------------
Not
Applicable
Top of 100Yr. / 24Hr. Storm Storage -------------------
136.59
FT.
Top of "Heavy Rain" Storage -------------------
Not
Applicable
Start Pump Elevation -------------------
135.98
FT.
End Pump Elevation -------------------
130.74
FT.
Top of Sludge Storage -------------------
Not
Applicable
Seasonal High Watertable Elev.-------------------
128.50
FT.
Finished Bottom Elevation -------------------
125.38
FT.
Inside Top Length -------------------
Not
Applicable
Inside Top Width -------------------
Not
Applicable
Side Slopes -------------------
3.0:1
H:V
Lagoon Surface Area -------------------
185,011
SF
Freeboard Depth -------------------
1.00
FT.
Temporary Storage Period -------------------
180
Days
Zone Depths:
TOTAL DESIGN VOLUME = 1709154 (CU.FT.)
Treatment / Sludge Storage Zone Depth ----------- 5.4 FT.
Temporary Storage Zone Depth ----------- 5.2 FT.
Freeboard / Storm Storage Zone Depth ----------- 1.6 FT.
Total Storage Pond Depth ----------- 12.2 FT.
Smithfield Hog Production Engineering P.O. Box 856, Warsaw NC 28398 [phone]

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10

Grower: Gaston Farm 8029 Designed By: JEO
Address: PO Box 759 Checked By: DSE
Rose Hill, NC 28458 Date: 01/03/23
County: Bladen Sheet 12 of 12
This Anerobic Digester is designed in accordance with the North Carolina Natural Resources Conservation
Service PRACTICE STANDARD 366- ANEROBIC DIGESTER, revised in September, 2018.
The Waste Storage Pond is designed in accordance with the North Carolina Natural Resources Convservation
Service PRACTICE STANDARD 313- WASTE STORAGE FACILITY, revised in December, 2017
DESIGNED: C7(�—
DATE: 01 /03/2023
COMMENTS: The lagoon has been designed as an irregular shape. Actual contour areas
taken from the lagoon design are used to calculate the surface area and storage volume
characteristics of the lagoon. This approach ensures that rainfall capture on the lagoon is
fully accounted for and that storage volumes calculated represent actual conditions.
Elevations are based on an assumed benchmark and do not represent mean sea level datum.
1 certify, to the best of my professional knowledge, judgement, and belief, this design calculation
is in accordance with the applicable NRCS standards.
Smithfield Hog Production Engineering P.O. Box 856, Warsaw NC 28398 [phone]