310015_Add-Info Response_20220418

April 14, 2022
Christine Lawson
NCDEQ Division of Water Resources
1601 Mail Service Center
Raleigh, NC 27699-1601
G�
C AVA N A U G H
Stewoi Qship 11�OVOWI��
Subject: Response to Additional Information Request
Application No. AWS310015/AW1310015
Magnolia III, DM Section 4 Sites 1-4, Section 3 Sites 4-5
Modification to Swine Digester Animal Waste Management System
Dear Ms. Lawson,
Cavanaugh & Associates, P.A., on behalf of the permittee, has reviewed your comments dated April 8,
2022 for the permit modification for the subject facility, and has developed responses and additional
supporting information to address each item in your comments. For your convenience, we have
repeated the comments below in bold font, followed by the responses in italicized font.
1. Permit Type Requested — Please clarify if the proposed modification is requested under the
current Individual Permit or General Permit. Are you requesting rescission of the alternate
permit? Do you wish to withdraw the AW1310015 renewal application received September 10,
2021?
Response:
The permittee, and applicant, wishes to proceed with a permit modification under the General
Permit, and upon issuance of the updated Certificate of Coverage under the General Permit,
proceed with recission of the Alternate Permit and withdrawal of the renewal application
received September 10, 2021.
2. Permitted Capacity —The permitted capacity indicated on the application is 47,520 Feeder -Finish;
however, the current permitted capacity is 48,520 Feeder -Finish (plus 4400 Farrow -Wean and 400
Wean -Feeder at the inactive Magnolia III site). Was the digester design based on 47,520 or 48,520
Feeder -Finish. Please also verify that the digester is only for the Feeder -Finish operation type.
Response:
Please maintain the current permitted capacity at 48,520 Feeder -Finish (plus 4400 Farrow -Wean
and 400 Wean -Feeder at the inactive Magnolia 111 site). To further clarify and confirm, the
design for the digester was based on 47,520 Feeder -Finish, as that reflects the currently
approved capacity for the active Feeder -Finish operation. The inactive sow farm site (Magnolia
111) included 1,000 head Feeder -Finish for gilt replacement, and as such, are not going to
contribute manure to the proposed digester.
3. Lagoon design information — Please lagoon design information for lagoons 3-4 and 3-5.
Response:
Please see additional lagoon design information attached to this submittal package.
Page 1 of 3

4. Liner design information — Please provide all available design information for the existing earthen
liner for the proposed Digester B (lagoon 3-5).
Response:
All available liner design information for the existing earthen liner has been included with this
response. The liner design information was provided with the necessary liner certification
documentation upon completion of construction, in or around 1995, and has been accepted as
having been provided as required in each subsequent permit renewal by the Division, de facto.
The applicant is unable to locate copies of the original design document used over twenty-five
years ago, but is confident that the information regarding the liner was found to have been
acceptable by the Division now through numerous permit renewals.
S. Land Application/Irrigation Map —Please provide a land application/irrigation map that aligns
with the Waste Utilization Plan.
Response:
Please see map information included with this response.
6. Tank Digesters — Please describe how the existing tank digesters will be used, decommissioned or
officially closed.
Response:
The existing tank digesters will be emptied of their contents and will not continue to receive
manure or be used for the anaerobic digestion of manure upon placing the proposed covered in -
ground digesters into service. The tanks will remain in place and will not be demolished, but will
not be physically connected to the manure piping system (air gap installed). The permittee
desires the tanks to remain in the permit for effluent storage that can be used in extreme
weather or emergency situations.
7. Operation & Maintenance —Contact Information —The contact information you have listed for me
is out of date, by some years. My current phone number is 919-707-3664. Please verify that
information for all contacts is accurate and update the O&M Contact List.
Response:
Please see updated Appendix A of the Operation & Maintenance Plan, with updated and current
contact information included, included with this response.
8. Transfer Force main — Sheet C.2.15.1A states that the Transfer Force Main from Lagoon 4-3 to
Lagoon 4-1 is an existing force main. It is unclear to me where that pipe is located/aligned on
either sheet C.2.15.1 or C.2.15.1A. Please clarify.
Response:
Please refer to sheet C.2.15.1A. In the center of the drawing sheet, the existing transfer
forcemain is labeled 'fm". There is a note that states "CONNECT PROPOSED TRANSFER
FORCEMAIN TO EXISTING 6" FORCEMAIN". The existing forcemain is shown adjacent to the
proposed "IFM" for a short distance, then makes a 90 degree bend to the west.
9. Stormwater Outlet — Please provide a typical detail for outlet for stormwater removed from
digester cover. Please also indicate location.
Page 2 of 3

Response:
Please see stormwater outlet detail included with this response. 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 in the detail provided may change, and if so, such change will be reflected in
the record drawings upon completion of construction.
10. Gas Utilization — Please provide information for the intended onsite and/or offsite use of the
biogas. The current designated use is electrical generation. If this is not the case, please provide
information regarding the decommissioning of generator and gas conditioning equipment.
Response:
At this time, the applicant has no specified nor contracted on -site nor off -site use of the biogas.
In the interim, the biogas will be vented to atmosphere.
11. Clarification of Flare Model — Please verify that a separate flare will be kept on -site for use for
each digester — a total of two. Where will these flares be stored? Will they be tested periodically?
Response:
A candlestick flare will be kept on site, at a location that is protected and chosen by the farm
owner based on ready accessibility, for use at each digester. There are no plans nor need to test
the flare on any regular basis, as the biogas will be vented to atmosphere should accumulated
biogas be stored for any extended duration.
12. 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; is considered confidential business information by the applicant, and we are unable to
find reference to the requirements for providing biogas generation estimates when seeking a
modification to the Permit of the subject facility. If our interpretation is in error, please provide
the reference to the applicable rule or statute.
Please do not hesitate to contact our office should you have any questions, comments, or require any
additional information.
Regards,
Cavanaugh & Associates, P.A.
William G. Simmons, Jr., P.E.
Attachments
cc: Ironside Investment Management, LLC, via AJ Linton
Jeff P. Cappadona, P.E.
Page 3 of 3

Land Application/Irrigation Map
Supplemental Information
3 D ac.
Aerway 94 Field in Section 4 (New Ground)
US State Plane 1983 Scale 1:5,000 NEW GROUND 94.SSF
North Carolina 3200 N 4/12/2006
NA© 1983 (Cones) 0 600.0
©PS PathflnderoOffice
Feet "imbie.

4400 TRACT SPRAY FIELD LOCATIONS PAM- -
NORTH C 309 MA4 3
NHONE; 910) 3-
GHCNE: (9/O)293-tlQ DM FARMS SITES 4&5, _
FARMS DM FARMS SECTION 4, MAG III
DUPUN k SANPSdY
CWNn
2 WN B1? l
JANUMYIS. 1999
CHECKED BY: Y.DN
SHEET l OF 1
SCALE 1' a 400"

Lagoon 3-4 Design
Information from Permittee
�y/M LJ1�i (_ P ri�
F A M I L Y F A R M S
May 22, 1995
Mr. Mike Sugg
District Conservationist
USDA -- Natural Resource Conservation Service
P. O. Box 277
Kenansville, NC 28349
RE: DM Farms Section 3, Site 4 - 7920 Feeder to Finish
Dear Mr. Sugg:
Enclosed for your review is the completed Animal Waste Management Plan -for the
above referenced swine farm. Specific items included in this package are as follows:
-- Location Map
- ASCS Tract Map
- Sons Investigation Report
- Lagoon Design Spreadsheet
- Operation & Maintenance Plan for Lagoon
- Construction Specifications for Lagoon
- Site Seeding Requirements
- Earthwork Calculations
- Waste Utilization Plan
- Site Plan with Construction Details
Please contact me at [phone], ext. 4629 if you have any questions concerning
this package.
Post Office Box 759, Rose Hill, North Carolina 28458, [phone], FAX [phone]

Sincerely,
M. Kevin Weston
Engineering Technician
MKW.tbh
Enclosures
cc: File
DM Farms, (complete package)
Johnny Taylor, Murphy Family Farms Construction Dept. (site plan only)
Dave Roland, Murphy Family Farms Transportation Dept. (site plan
only)

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LAGOON SITE SOILS INVESTIGATION
PROJECT: S3S� COUNTY: �u s
FIELD INVESTIGATION BYf
�Q / / DATE:
SITE SKETCH
� e
�a
JC /
i
BORING
DEPTH
SCALE
WT
BORING NUMBER AND PROFILE
3
Gild sA�
}'✓ ,'i San
G/n�er Fouh
Sar
n L
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Des�q S
//ow
s
oss�ic
BORING/ SAMPLING METHOD: '41 C �� SIGNATURE: � �

e "or:S3S4 County: DUPLIN Date:
stance to nearest residence (other than owner):
AVERAGE LIVE: WEIGHT (ALW)
0 sows (farrow to finish)
0 sows (farrow to feeder)
7920 head (finishing only)
0 sows (farrow to wean)
0 head (wean to feeder)
Describe other :
x 141.7
lbs. _
x 522
lbs. _
x 135
lbs. _
x 433
lbs. _
x 30
lbs. _
09/26/94
feet
0
lbs
0
lbs
1069200
lbs
0
lbs
0
lbs
0
Total Average Live Weight = 1069200 lbs
MINIMUM REQUIRED TREATMENT VOLUME OF LAGOON
Volume = 1069200 lbs. ALW x Treatment Volume(CF)/lb. ALW
Treatment Volume(CF)/lb. ALW = 1 CF/lb. ALW
Volume = 1069200 cubic feet
STORAGE VOLUME FOR SLUDGE ACCUMULATION
Volume = 0.0 cubic feet
TOTAL DESIGNED VOLUME
Inside top length (feet)------------------------ 475.0
Inside top width (feet)-------------------------- 475.0
Top of dike elevation (feet)-------------------- 52.1
Bottom of lagoon elevation (feet)------------- 42.1
Freeboard (feet)------------------------------- 1.0
Side slopes (inside lagoon)---------------------- 3.0 : i
Total design volume using prismoidal formula
SS/END1 SS/END2 SS/SIDE1 SS/SIDE2 LENGTH WIDTH DEPTH
3.0 3.0 3.0 3.0 469.0 469.0 9.0
AREA OF TOP
LENGTH * WIDTH =
469.0 469.0
219961 (AREA OF TOP)
LENGTH * WIDTH =
415.0 415.0 172225 (AREA OF BOTTOM)
AREA OF MID:-ECTION
LENGTH * WIDTH * 4
442.0 142.0 781456 (AREA OF MIDSECTION * 4)
CU. FT. = [AREA TOP + (4*AREA MIDSECTION) + AREA BOTTOM] DEPTH/6
219961.0 781456.0 172223.0 1.5
Total Designed Volume Available = 1760463 CU. FT.

IMPORARY STORAGE REQUIRED
DRAINAGE AREA:
Lagoon (top of dike)
Length * Width =
475.0 475.0 225625.0 square feet
Buildings (roof and lot water)
42023.8 square feet
TOTAL DA 267648.8 square feet
Describe this area.
Design temporary storage period to be 180 days.
Volume of waste produced
Feces & urine production in gal./day per 135 lb. ALW 1.37
Volume = 1069200 lbs. ALW/135 lbs. ALW * 1.37 gal/day 180 days
Volume = 1953072 gals. or 261105.9 cubic feet
plume of wash water
This is the amount of fresh water used for washing floors or volume
of fresh water used for a flush system. Flush systems that recirculate
the lagoon water are accounted for in 5A.
Volume = 0.0 gallons/day 180 days storage/7.48 gallons
per CF
Volume = 0.0 cubic feet
Volume of rainfall in excess of evaporation
Use period of time when rainfall exceeds evaporation by largest amount
i80 days excess rainfall =
Volume = 7.0 in DA / 12 inches per_foot
Volume = 156128.5 cubic feet
7.0 inches

olume of 25 year — 24 hour storm
Volume = 7.5 inches / 12 inches per foot * DA
Volume = 167280.5 cubic feet
TOTAL REQUIRED TEMPORARY STORAGE
5A.
261106
cubic
feet
5B.
0
cubic
feet
5C.
156128
cubic
feet
5D.
167281
cubic
feet
TOTAL 584313 cubic feet
MN'BMrW2r'l19
Temporary storage period==___________________)
180
days
Rainfall in excess of evaporation===========)
7.0
inches
25 year -- 24 hour rairfall.===_______________)
7.5
inches
1.0
feet
Side slopes_______________________________ _>
3.0
: 1
Inside top length==='________________________>
475.0
feet
Inside top width____________________________>
475.0
feet
Top of dike elevation_______________________)
52.1
feet
Bottom of lagoon elevation==—============_>
42.1
feet
Total required vol_ime==-=____________________)
1653715
cu. ft. �
Actual design vol_tme=====____________________)
1760463
cu. ft.
Seasonal high watertable elevation (SHWT)===)
45.0
feet
Stop pumping elev.===_______________________>
48.1
feet
Must be ) or ,== to the SHWT elev.===_______)
45.0
feet
Must be ) or = to min. req. treatment el.=)
48.1
feet
Required minimum treatment vol_ime=====_______?
1069200
cu. ft.
Volume at stop pumping el.evati.on============)
1125582
cu. ft.
Start pumping elev._________________________>
50.1
feet �
Must be at bottom of freeboard R 25 yr. rainfall
Actual volume less 25 yr.— 24 hr. rainfall==)
1593183
cu. ft.
Volume at start pumping elevation===========)
1543304
cu. ft.
Required volume to be pumped================>
417234
cu. ft.
Actual volume planned to be pumped==========)
417722
cu. ft.
Min. thickness of soil liner when required=0
1.5
feet
DESIGNED BY: APPROVED BY:i
DATE:
DATE: tbo,10 o
NOTE: SEE ATTACHED WASTE UTILIZATION PLAN
COMMENTS:

OPERATION AND MAINTENANCE PLAN
This lagoon is designed for waste treatment (permanent storage) and
180 days of temporary storage. The time required for the planned
Aid level (permanent and temporary storage) to be reached may vary
due to site conditions, weather, flushing operations, and the amount
of fresh water added to the system.
The designed temporary storage consists of 1.80 days storage for:
(1) waste from animals and (2) excess rainfall after evaporation. Also
included is storage for the 25 year — 24 hour storm for the location.
The volume of waste generated from a given number of animals will be
fairly constant throughout the year and from year to year, but excess
rainfall will vary from year to year. The 25 year rainfall will not
be a factor to consider in an annual pumping cycle, but this storage
volume must always be available.
A maximum elevation is determined in each design to begin
pumping and this is usually the outlet invert of pipe(s) from
building(s). If the outlet pipe is not installed at the elevation to
begin pumping, a permanent marker must be installed at this elevation
to indicate when pumping should begin. An elevation must be established
to stop pumping to maintain lagoon treatment depth.
Pumping can be started or stopped at any time between these two
elevations for operating convenience as site conditions permit, such as
weather, soils, crop, and equipment in order to apply waste without
runoff or leaching.
.and application of waste water is recognized as an acceptable
ethod of disposal. Methods of application include solid set,
center pivot, guns, and traveling gun irrigation. Care should be
taken when applying waste to prevent damage to crops.
The following items are to be carried out:
1. It is strongly recommended that the treatment lagoon be pre —
charged to 1./2 its capacity to prevent excessive odors during
start—up. Pre —charging reduces the concentration of the initial
waste entering the lagoon thereby reducing odors. Solids should be
covered with effluent at all times. When prechiarging is complete,
flush buildings with recycled lagoon liquid. Fresh water should not
be used for flushing after initial filling.
c. The attached waste utilization plan shall be followed. This
plan recommends sampling and testing of waste (see attachment)
"—befor
3. Begin temporary storage pump —out of the lagoon when fluid level
reaches the elevation 50.1 as marked by permanent marker. Stop pump —
out when the fluid level reaches elevation 48.1 . This temporary
storage, less 25 yr-- 24 hrr• storm, contains 417234 cubic feet or
3120913 gallons.

SHEET c OF
4. The recommended maximum amount to apply per irrigation is
one (i) inch and the recommended maximum application rate is 0.3
inch per hour. Refer to the waste utilization plan for further- details.
A Keep vegetation on the embankment and areas adjacent to the
lagoon mowed annually. Vegetation should be fertilized as needed
to maintain a vigorous stand.
6. Repair any eroded areas or.areas damaged by rodents and
establish in vegetation.
7. All surface runoff is to be diverted from the lagoon to stable
outlets.
8. Keep a minimum of 25 feet of grass vegetated buffer around
waste utilization fields adjacent to perennial streams. Waste will
not be applied in open ditches. Do not pump within 200 feet of a
residence or within 100 feet of a well. Waste shall be applied in a
manner not to reach other property and public right—of—ways.
9. The Clean Water tact of 1977 prohibits the discharge of
pollutants into waters of the United States. The Department of
Environment, Health, and Natural Resources, Division of Environ--
mental Management, has the responsibility for enforcing this law.

rtA n Lagoon 3-5 Design
9
URPHY Information from
Permittee
FAMILY FARMS
September 13, 1995
Mr. Mike Sugg
District Conservationist
USDA - Natural Resource Conservation Service
P. O. Box 277
Kenansville, NC 28349
RE: DM Farms Section 3, Site 5 - 7920 Feeder to Finish Addition
Dear Mr. Sugg:
Enclosed fL your review is the completed Animal Waste Management Plan for the
above referenced swine farm. Specific items included in this package are as follows:
-- Location Map
-- Tract Map
-- Soils Investigation Report
-- Lagoon Design Spreadsheet
-- Operation & Maintenance Plan for Lagoon
-- Construction Specifications for Lagoon
- Site Seeding Requirements
- Earthwork Calculations
- Site Plan with Construction Details
It is my understanding that the Waste Utilization Plan for this farm will be developed
for the grower by Murphy Family Farms.
Please contact me at [phone]) ext. 4629 if you have any questions concerning
this package.
Post Office .Box 759, Rose Hill, North Carolina 28458, [phone], FAX [phone]

Sincerely,
M. Kevin Weston
Engineering Technician
MKW.tbh
Enclosures
cc: File
DM Farms, (complete package)
Johnny Taylor, Murphy Family Farms Construction Dept. (site plan only)
Dave Roland, Murphy Family Farms Transportation Dept. (site plan
only)

!3
LAGOON SITE SOILS INVESTIGATION
------ --------------------------------------
PROJECT:�3S COUNTY:
FIELD INVESTIGATION BY:/UAit:7
SITE SKETCH
3
Jo<
i
i
BORING
DEPTH
SCALE
WT
BORING NUMBER AND PROFILE
/E 1 e u rs
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cA
s T,
1
/
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0( C/a
4./� l
ilin i' D
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BORING ! SAMPLING METHOD: SIGNATURE:

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7:7
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----------
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p! 6
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-7
1\4 3063 N
L
ju
V A r) 1�'O 34*52'30"
762-IL 78'0730"
101 760
761
ROAD CLASSIFICATION 0
"0
I MILE Primary highway, Light -duty road, hard or
improved surface —
IT hard surface—__.— p. -4
Secondary highway,
Uhimpjv�q
[bard surface-----...-- .. ..
Route Stabi,Route
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p ator:MURPHY County: DxPiIN Date; 09/01/95
/
istance to nearest residence (other than owner): feet
AVERAGE LIVE WEIGHT (ALN)
0
sows
(farrow
to
finish)
x 1417
lbs. =
0
lbs
0
sows
(farrow
to
feeder)
x 522
lbs. =
0
lbs
7920
head
(finishing
only)
x 135
lbs. =
1069200
lbs
8
sows
(farrow
to
wean)
x 433
lbs. =
m
lbs
W
head
(wean to
feeder)
x 30
lbs. =
@
lbs
Describe
other
:
:
0
Total Average Live Weight =
1069200
lbs
MINIMUM REQUIRED TREATMENT VOLUME OF LAGOON
Alume = 1069200 lbs. ALW x Treatment Vnlume(CF)/lb. ALN
Treatment Vplume(CF)/lb. ALW = 1 CF/lb. AL�
Volume = 1069200 cubfc feet
STORAGE VOLUME FOR SLUDGE ACCUMULATION
Volume = 0.0 cubic feet
TOTAL DESIGNED VOLUME
� Inside top length (feet)----------`'--------- 490"9
Inside top width (feet)^----------------^---- 460.@
Top of dike elevation (feet)---^-~----------- 102^0
Bottom of lagoon elevation (feet)------------ 9201
Freeboard (feet)----`------------------------ 1.0
Side slopes (inside lagoon)------------------ 3.0 : 1
Total design volume using prismnidal formula
SS/END1 S3/END2 SS/SInE1 SS/SIPF2 LENGTH WIDTH DEPTH
3.0 3.0 3.0 3.0 484.0 454.0 9.0
AREA OF TOP
LENGTH * WIDTH =
484.0 454.0 219736 (AREA OF TOP)
AREA OF BOTTOM
LENGTH * WIDTH =
430.0 400.0
172000 (AREA OF BOTTOM)
AREA OF MIDSECTION
LENGTH * WIDTH * 4
457.0 427.0 780556 (AREA OF MIDSECTION * 4)
Co. FT. = [AREA TOP + (t*AKEA MIDSECTION) + AREA BOTTOM] * DEPTH/6
219736.m 780556.0 172000.0 1.�
Total Designed Volume Available = 1758438 CU. FT.

. TEMPORARY STORAGE REQUIRED
DRAINAGE AREA:
Lagoon (top of dike)
Length * Width =
490"0 460.0 P25400.0 square feet
Buildings (roof and lot water)
37800.0 square feet Describe this area.
._ TOTAL DA 263200.0 square feet
Design temporary storage period to he 180 days.
\. Volume of waste produced
Feces 8 urine production in gal./day per 135 1b. AL4 1.37
Volume = 1069200 lhs. ALW/135 lbs. ALW * 1.37 gal/day 180 days
Volume = 1953072 gals. or 261105.9 cubic fee*
� Volume of wash water
This is the amount of fresh water used for washing floors or volume
of fresh water used for a flush system. Flush systems that recirculate
the lagoon water are accounted for in 5A.
Volume = 0.0 Mallons/day *
Volume = 0.0 cubic feet
180 days storage/7.48 gallons
Per CF
Volume of rainfall in excess of evaporation
Use period of time when rainfall exceeds evaporation by largest amount.
180 days excess rainfall = 7^0 inches
Volume = 7.0 in * DA / 12 inches per foot
Volume = 153533.3 cubic feet

} Volume of 25 year - 24 hour stcrm
Volume = 7.5 inches / 12 inches per foot * DA
Volume = 164500.0 cubic feet
TOTAL REQUIRED TEMPORARY STORAGE
5A.
261106
cubic
feet
59.
0
cubic
feet
5C.
153533
cubic
feet
5D.
164500
cubic
feet
TOTAL 579139 cubic feet
SUMMARY
Temporary storage period====================>
180
days
Rainfall in excess of evaporation===========>
7.0
inches
25 year ` 24 hour rainfall==================>
7.5
inches
Freeboard===================================>
1.0
feet
Side slcpes=================================>
3.0
: 1
Inside top leng*h==========
490.0
feet-,
Inside top width============================}
460.0
feet
, Top of dike elevation=======================>
102.0
feet,
Bottom of lagoon eleva*ion==================}
92,0
feet
Total required volume=======================>
1648339
c,. ft. *
Actual design vclvme========================>
1758438
cu. ft. *
neascnal high watert*blc elevation (SHuT)===>
98.0
feet
Stop pumping elev.==========================>
98.0
feet *
Mus+ be > or = to the SHWT elev.==========>
98.0
feet-,
Must,be > or = to min. req. treatment el.=>
98.0
feet
Required minimum treatment volume===========>
1069200
cu. ft,,
Volume at stop pumping elevation============>
1124232
c". ft.
Start pumping elev.=========================>
100.1
feet *
Must be at bottom of freeboard & 25 yr,
rainfall
Actual volume less 25 yr.- 24 hr. r*infall==>
1593938
cu. ft.
Volume at start pumping elevation===========>
1562946
cu. ft.
Required volume to be pumped================>
414639
cu. ft. *
Actual volume planned to be pumped==========>
438714
cu. ft. *
Min. thickness of soil liner when reVuired==>
1.5
feet
DESIGNED BY: APPROVED BY�;
/'\ J`^�
DATE: DATE;
'«�«
/4��"�
8//1 ��/ ^
NOTE: SEE ATTACHED WASTE UTILIZATION PLAN
COMMENTS:

OPERATION AND MAINTENANCE PLAN
~---`-------------------`-----
This lagoon is designed for waste treatment (Permanent storage) and
180 days of temporary storage. The time required for the planned
fluid level (permanent and temporary storage) to be reached may vary
due to site conditions, weather, flushing operations, and the amount
of fresh water added to the system.
The designed temporary storage consists of 180 days storage for:
(1) waste from animals and (2) excess rainfall after evaporation. Also
included is storage for the 25 year - 24 hour storm for the location.
The volume of waste generated from a given number of animals will he
fairly constant throughout the year and from year to year, but excess
rainfall will vary from year to year. The 25 year rainfall will not
be a factor to consider in an annual pumping cycle, but this storage
volume must always be available.
A maximum elevation is determined in each design to begin
pumping and this is usually the outlet invert of pipe(s) from
building(s). If the outlet pipe is not *installed at the elevation to
begin pumping, a permanent marker must be installed at this elevation
to indicate when pumping should begin. An elevation must be established
to stop pumping to maintain lagoon treatment depth.
Pumping ,an he started or stopped at any time between these two
elevations for operating convenience as site conditions permit, such as
weather, soils, crop, and equipment in order to apply waste without
runoff or leaching.
Land application of waste water is recognized as an acceptable
I
nwethod of disposal. Methods of application include solid set
'
renter pivot, guns, and traveling gun irrigetion. Care should be
taken when applying waste to prevent damage to crops.
The following items are to he carried out::
1. It is strongly recommended that the treatment lagoon be pre
charged to 1/2 its capacity to prevent excessive odors during
start-up. Prn-charging reduces the concentration of the initia1
waste entering the lagoon thereby reducing odors. Solids should be
covered with effluent at all times. When precharging is complete,
flush buildings with recycled lagoon liquid. Fresh water should not
be used for flushing after initial filling.
2. The attached waste utilization plan shall be followed. This
plan recommends sampling and testing of waste (pee attachment)
before land application.
3. Begin temporary storage pump -cut of the lagoon when fluid level
reaches the elevation 100.1 as marked by pe'm+nen* marker. Stop pump -
out when the fluid level reaches elevation 98.0 . This temporary
storage, less 25 yr- 24 hr vtcrm, contains 414639 cubic feet or
3101501 gallons.

SHEET 2 OF 2
^ 4. The recommended maximum amount to apply per irrigation is
one (1) inch and the recommended maximum application rate is 0.3
inch per hour. Refer to the waste utilization plan for further details.
�5. Keep vegetation on the embankment and areas adjacent to the
lagoon mowed annually. Vegetation should be fertilized as needed
to maintain a vigorous stand.
G. Repair any eroded areas or areas damaged by rodents and
establish in vegetation.
7^ All surface runoff is to be diverted from the lagoon to stable
outlets.
B. Keep * minimum of 25 feet of grass vegetated buffer around
waste utilization fields adjacent to perennial streams. Waste will.
not be applied in open ditches. Do not pump within 2g0 feet of a
residence or within 100 feet of a well. Waste shall be applied in a
manner not to reach other property and public right-of-ways.
9. The Clean Hater Act of 1977 prohibits the discharge of
pollutants into waters of the United States. The Department of
Environment, Health, and Natural Resources, Division of Environ-
mental Management, has the responsibility for enforcing this law.

Appendix A: Contact Information
Project Management and Equipment Service Providers:
Influent Pump Station
Lee Brock
Brock Equipment Company
[e-mail]
[phone]
Anaerobic Digester Cover
Plastic Fusion Fabricators, Inc.
Larry Hice
[e-mail]
[phone]
Mixing Pump Station
Lee Brock
Brock Equipment Company
[e-mail]
[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 (Biogas)
ProPump & Controls Inc.
Jeff McGuire
Work: [phone]
Cell: [phone]
[e-mail]
Mechanical Installation & Controls (Manure
Murphy Family Ventures, LLC
collection, Digester, Effluent, & Irrigation)
Dan Best
Self -Performed by Permittee
Cell: 910-271-0362
[e-mail]
Anaerobic Digester System O&M Page 13 of 16

Regulatory and other Agencies:
Name Agency Location Phone
Christine Blanton DWQ, AFO Permitting Raleigh, NC [phone]
Lawson and Compliance
Anaerobic Digester System O&M Page 14 of 16

�• r� STORMWATER DRAIN PIPE & OUTLET
F - PROTECTION
i
t
IP5-6A
I N V
EXISTING 9) 10'.] T : w1
41 VALVE=
f EXISTING LAGOON '4-4'
TO BE CONVERTED TO k
ANAEROBIC DIGESTER
TOP OF DIKE 135.00'
135
FFE
FF�
FFE 1.37,00'
FF� 137.QQ'
FFE 137.00'
4 EXISTING FREEBOARD 134.40' ' ti_ -4-
REEBOARD 133.00' r i • f, * v . .
LOCATION MAP 2
SCALE: NOT TO SCALE B D1
NOTES:
1. DRAIN PIPE SHALL BE 4" CORR. HDPE OR EQUIVALENT.
2. STORMWATER DRAIN SHALL HAVE MIN. 0.25% SLOPE.
3. DRAIN LOCATION SHOWN AS APPROXIMATE. EXACT DRAIN PUMP
LOCATION AND OUTLET TO BE DETERMINED UPON RECEIPT AND
APPROVAL OF COVER SUBMITTALS.
4. OUTLET SHALL EXTEND MIN 10' BEYOND OUTSIDE TOE OF DIKE.
12"
LACE WASHED
TONE AROUND
IPE AS DIRECTED
Y THE ENGINEER
#57 WASHED STONE,
2" THICK
MAINTENANCE
INSPECT OUTLET STRUCTURES WEEKLY AND AFTER SIGNIFICANT (1" OR
GREATER) RAINFALL EVENTS TO SEE IF ANY EROSION AROUND OR
BELOW THE OUTLET HAS TAKEN PLACE, OR IF STONES HAVE BEEN
DISLODGED. IMMEDIATELY MAKE ALL NEEDED REPAIRS TO PREVENT
FURTHER DAMAGE.
OUTLET PROTECTION 1
SCALE: NOT TO SCALE B D 1
2:1 SLOPE
5 0 -
MIRAFI 50OX FILTER
FABRIC OR APPROVED
EQUAL
STORM WATER
OUTLET
DETAIL
PPRROJECT#: BE.19.002
OJECT WGS
AWN
ON —FARM
DM FARMS
BIOGAS
SEC 4
SYSTEM
SITES 1-4;
4-4
CAVANAUGH G�`
SoIW'ons through integrity antl partnership
BD1
D U P L I N 8c
SAMPSON COUNTY,
N C
Cavanaugh 8 Associates, P.A.PO Box 11191
Winston-Salem, NC 21116
1-677-557-3923 www.cavanaughsolutions.com
DATE: 4/14/2022

ram' � � F � '•;t, �
� All
� �/ ',,'
�i
tj EXISTING INFLUENT`t
PUMP STATION i ti ti
ti
fr.-,v rrf aa'd • �+- E. ry�iS3
�1 EXISTING LAGOON
t TO BE CONVERTED TO
ANAEROBIC DIGESTER
y TOP OF DIKE 142.00'
1EXISTING FREEBOARD 141.00'
% NEW_FREEBOARC a140.00'
LOCATION MAP r2
SCALE: NOT TO SCALE �Dl
NOTES:
1. DRAIN PIPE SHALL BE 4" CORR. HDPE OR EQUIVALENT.
2. STORMWATER DRAIN SHALL HAVE MIN. 0.25% SLOPE.
3. DRAIN LOCATION SHOWN AS APPROXIMATE. EXACT DRAIN PUMP
LOCATION AND OUTLET TO BE DETERMINED UPON RECEIPT AND
APPROVAL OF COVER SUBMITTALS.
4. OUTLET SHALL EXTEND MIN 10' BEYOND OUTSIDE TOE OF DIKE.
12"
LACE WASHED
TONE AROUND
IPE AS DIRECTED
Y THE ENGINEER
#57 WASHED STONE,
2" THICK
MAINTENANCE
INSPECT OUTLET STRUCTURES WEEKLY AND AFTER SIGNIFICANT (1" OR
GREATER) RAINFALL EVENTS TO SEE IF ANY EROSION AROUND OR
BELOW THE OUTLET HAS TAKEN PLACE, OR IF STONES HAVE BEEN
DISLODGED. IMMEDIATELY MAKE ALL NEEDED REPAIRS TO PREVENT
FURTHER DAMAGE.
OUTLET PROTECTION 1
SCALE: NOT TO SCALE B D 1
2:1 SLOPE
MIRAFI 50OX FILTER
FABRIC OR APPROVED
EQUAL
STORM WATER
OUTLET
DETAIL
PROJECT DRAWN BY:: WGS
ON —FARM
DM FARMS
BIOGAS
SEC 4
SYSTEM
SITES 1-4;
3-5
CAVANAUGH �11
Soluh'ons through integrity antl partnership
BD1
D U P L I N 8c
SAMPSON COUNTY,
N C
Cavanaugh &Associates, P.A.PO Box 11191
27116
Winston-Salem• na ghsol
1-877-557-8923 www.cavanaughsolu[ions.com
DATE: 4/14/2022