310005_Add-Info Response - GenPermit Renewal_20240610

Smithfield
JGood food. -R'espovtsib(�'
June 10, 2024
Christine Lawson
DEQ Division of Water Resources
Water Quality Permitting
Animal Feeding Operations
1636 Mail Service Center
Raleigh, NC 27699-1636
Subject: Additional Information Request for
Application No. ADS310005
Scott Farm Sites 1-4
Duplin County
Dear Ms. Lawson,
M. Kevin Weston
Sr. Environmental Compliance Technical Specialist
Smithfield Hog Production Division
P.O. Box 856
2822 NC Hwy 24 West
Warsaw, NC 28398
[phone] tel
[phone] fax
This letter is in response to the Additional Information Request letter dated June 4, 2024, for the above -mentioned
facility.
Request 1: Provide most current WUP and irrigation maps - The WUP dated December 15, 2023 along
with the irrigation maps that were submitted with the initial Farm Digester permit application,
should be used as they are the most current for this facility.
Request 2: Provide the most current 0&M Plan - The Waste -to -Energy System 0&M manual that was
submitted as part of the initial Farm Digester permit application, should be used as it is the
most current for this facility.
Please utilize a copy of both items requested above from the initial Farm Digester permit application, in the current
renewal permit application package for the Farm Digester permit.
If you have any questions regarding this matter, please contact me.
Sincerely,
M. Kevin Weston
[e-mail]
www.smithfieldfoods.com

Murphy -Brown, LLC
Grower(s):
Farm Name:
12/15/2023 2822 Hwy 24 West
P.O. Box 856
Warsaw, NC 28398
NUTRIENT UTILIZATION PLAN
Murphy -Brown, LLC dba Smithfield Hog Production
Scott Farm; Fac. No.: 31-5
County: Du lin
Permit Capacity:
Farrow to Wean
Farrow to Feeder
Farrow to Finish
Wean to Feeder
Wean to Finish 14,375
Feeder to Finish
Gilts
Boars
Storage Structure:
Storage Period:
Application Method:
Anaerobic Lagoon
>180 days
Irrigation
The waste from your animal facility must be land applied at a specified rate to prevent pollution
of surface water and/or groundwater. The plant nutrients in the animal waste should be used
to reduce the amount of commercial fertilizer required for the crops in the fields where the waste
is to be applied.
This waste utilization plan uses nitrogen as the limiting nutrient. Waste should be analyzed
before each application cycle. Annual soil tests are strongly encouraged so that all plant
nutrients can be balanced for realistic yields of the crop to be grown.
Several factors are important in implementing your waste utilization plan in order to maximize
the fertilizer value of the waste and to ensure that it is applied in an environmentally safe manner:
1. Always apply waste based on the needs of the crop to be grown and the nutrient
content of the waste. Do not apply more nitrogen than the crop can utilize.
2. Soil types are important as they have different infiltration rates, leaching potentials,
cation exchange capacities, and available water holding capacities.
3. Normally waste shall be applied to land eroding at less than 5 tons per acre per
year. Waste may be applied to land eroding at 5 or more tons per acre annually, but
less than 10 tons per acre per year providing that adequate filter strips are established.
4. Do not apply waste on saturated soils, when it is raining, or when the surface is frozen.
Either of these conditions may result in runoff to surface waters which is not allowed
under DWR regulations.
5. Wind conditions should also be considered to avoid drift and downwind odor
problems.
6. To maximize the value of the nutrients for crop production and to reduce the potential
for pollution, the waste should be applied to a growing crop or applied not more than
30 days prior to planting a crop or forages breaking dormancy. Injecting the waste or
disking will conserve nutrients and reduce odor problems.
1 of 11

This plan is based on the waste application method shown above. If you choose to change
methods in the future, you need to revise this plan. Nutrient levels for different application
methods are not the same.
The estimated acres needed to apply the animal waste is based on typical nutrient content
for this type of facility. In some cases you may want to have plant analysis made, which could
allow additional waste to be applied. Provisions shall be made for the area receiving waste to
be flexible so as to accommodate changing waste analysis content and crop type. Lime must
be applied to maintain pH in the optimum range for specific crop production.
This waste utilization plan, if carried out, meets the requirements for compliance with 15A NCAC
2H .0217 adopted by the Environmental Management Commission.
AMOUNT OF WASTE PRODUCED PER YEAR ( gallons, ft3, tons, etc.):
Capacity Type Waste Produced per Animal Total
Farrow to Wean
3203 gal/yr
gal/yr
Farrow to Feeder
3861 gal/yr
gal/yr
Farrow to Finish
10478 gal/yr
gal/yr
Wean to Feeder
191 gal/yr
gal/yr
14375
Wean to Finish
776 gal/yr
11,155,000 gal/yr
Feeder to Finish
927 gal/yr
gal/yr
Gilts
1015 gal/yr
gal/yr
Boars
2959 gal/yr
gal/yr
Total 11,155,000 gal/yr
AMOUNT OF PLANT AVAILABLE NITROGEN PRODUCED PER YEAR (Ibs):
Capacity Type Nitrogen Produced per Animal Total
Farrow to Wean
3.84 Ibs/yr
Ibs/yr
Farrow to Feeder
6.95 Ibs/yr
Ibs/yr
Farrow to Finish
18.86 Ibs/yr
Ibs/yr
Wean to Feeder
0.34 Ibs/yr
Ibs/yr
14375
Wean to Finish
1.4 Ibs/yr
20,125 Ibs/yr
Feeder to Finish
1.67 Ibs/yr
Ibs/yr
Gilts
1.83 Ibs/yr
Ibs/yr
Boars
5.33 Ibs/yr
Ibs/yr
Total 20,125 Ibs/yr
Applying the above amount of waste is a big job. You should plan time and have appropriate
equipment to apply the waste in a timely manner.
LAND UTILIZATION SUMMARY
The following table describes the nutrient balance and land utilization rate for this facility
Note that the Nitrogen Balance for Crops indicates the ratio of the amount of nitrogen produced
on this facility to the amount of nitrogen that the crops under irrigation may uptake and utilize
in the normal growing season.
Total Irrigated Acreage: 163.03
Total N Required 1st Year: 43645.90
Total N Required 2nd Year: 24033.88
Average Annual Nitrogen Requirement of Crops: 33,839.89
Total Nitrogen Produced by Farm: 20,125.00
Nitrogen Balance for Crops: (13,714.89)
The following table describes the specifications of the hydrants and fields that contain the crops
designated for utilization of the nitrogen produced on this facility. This chart describes the size,
soil characteristics, and uptake rate for each crop in the specified crop rotation schedule for this
facility.
2of11

Reception Area Specifications Year i of 2 year crop rotation
Tract Field Irrigated Soil 1st Crop Time to 1st Crop 1st Crop Lbs N/Ac Lbs N Total Ibs N
Acreage Type Code Apply Yield Ibs N/Unit Residual /Ac Utilized
2nd Crop Time to 2nd Crop 2nd Crop Lbs N/Ac Lbs N Total Ibs N
Code Apply Yield Ibs N/Unit Residual /Ac Utilized
Total
Lbs N/Ac
Total lbs N
Utilized
73021
1
5.03
Autryville
D
Feb15-June
153.3
0.93
15
127.569
641.6721
N
Sept -Apr
68.7
2.04
140.148
704.9444
267.717
1346.617
73021
2
4.37
Aut ille
D
Feb15-June
153.3
0.93
15
127.569
557.4765
N
Sept -Apr
68.7
2.04
140.148
612.4468
267.717
1169.923
73021
3
1.57
Autryville
D
Feb15-June
153.3
0.93
15
127.569
200.2833
N
Sept -Apr
68.7
2.04
140.148
220.0324
267.717
420.3157
73021
4
4.78
Goldsboro
D
Feb15-June
153.3
0.93
15
127.569
609.7798
N
Sept -Apr
68.7
2.04
140.148
669.9074
267.717
1279.687
73021
5
4.2
Goldsboro
D
Feb15-June
153.3
0.93
15
127.569
535.7898
N
Sept -Apr
68.7
2.04
140.148
588.6216
267.717
1124.411
73021
6
4.58
Goldsboro
D
Feb15-June
153.3
0.93
15
127.569
584.266
N
SepApr
68.7
2.04
140.148
641.8778
267.717
1226.144
73021
7
4.96
Goldsboro
D
Feb15-June
153.3
0.93
15
127.569
632.7422
N
Sept -Apr
68.7
2.04
140.148
695.1341
267.717
1327.876
73021
8
5.98
Goldsboro
D
Feb15-June
153.3
0.93
15
127.569
762.8626
N
Sept -Apr
68.7
2.04
140.148
838.085
267.717
1600.948
73021
9
2.11
Foreston
D
Feb15-June
153.3
0.93
15
127.569
269.1706
N
Sept -Apr
68.7
2.04
140.148
295.7123
267.717
564.8829
73021
10
5.17
Foreston
D
Feb15-June
153.3
0.93
15
127.569
659.5317
N
Sept -Apr
68.7
2.04
140.148
724.5652
267.717
1384.097
73021
11
3.96
Foreston
D
Feb15-June
153.3
0.93
15
127.569
505.1732
N
Sept -Apr
68.7
2.04
140.148
554.9861
267.717
1060.159
73021
12
6.58
Rains
D
Feb15-June
153.3
0.93
15
127.569
839.404
N
Sept -Apr
68.7
2.04
140.148
922.1738
267.717
1761.578
73021
13
5.73
Rains
D
Feb15-June
153.3
0.93
15
127.569
730.9704
N
Sept -Apr
68.7
2.04
140.148
803.048
267.717
1534.018
73021
14
6.56
Rains
D
Feb15-June
153.3
0.93
15
127.569
836.8526
N
Sept -Apr
68.7
2.04
140.148
919.3709
267.717
1756.224
73021
15
2.16
Rains
D
Feb15-June
153.3
0.93
15
127.569
275.549
N
Sept -Apr
68.7
2.04
140.148
302.7197
267.717
578.2687
73021
16
3.32
Rains
D
Feb15-June
153.3
0.93
15
127.569
423.5291
N
Se t-Apr
68.7
2.04
140.148
465.2914
267.717
888.8204
73021
17
2.61
Rains
D
Feb15-June
153.3
0.93
15
127.669
332.9551
N
Sept -Apr
68.7
2.04
140.148
1 365.7863
267.717
698.7414
73021
18
2.69
Foreston
D
Feb15-June
153.3
1 0.93
15
127.569
343.1606
N
Sept -Apr
68.7
1 2.04
140.148
1 376.9981
267.717
720.1587
73021
19
4.76
1 Foreston
D
Feb15-June
153.3
0.93
15
127.569
607.2284
N
Sept -Apr
68.7
2.04
140.148
667.1045
267.717
1274.333
73021
20
3.4
Foreston
D
Feb15-June
153.3
0.93
15
127.569
433.7346
N
Se t-A r
68.7
2.04
140.148
476.5032
267.717
910.2378
73021
21
5.03
Rains
D
Feb15-June
153.3
0.93
15
127.569
641.6721
N
Sept -Apr
68.7
2.04
140.148
704.9444
267.717
1346.617
73021
22
3.78
Rains
D
Feb15-June
153.3
0.93
15
127.569
482.2108
N
Sept -Apr
68.7
2.04
140.148
529.7594
267.717
1011.97
73021
23
3.41
Rains
D
Feb15-June
153.3
0.93
15
127.569
1 435.0103
N
Sept -Apr
68.7
2.04
140.148
477.9047
267.717
912.915
73021
25
6.73
Autryville
D
Feb15-June
153.3
0.93
15
127.569
858.5394
N
Sept -Apr
68.7
2.04
140.148
943.196
267.717
1801.735
73021
26
7.26
Autfyville
D
Feb15-June
153.3
0.93 1
15
127.569
926.1509
1 N
Sept -Apr
68.7
2.04
140.148
1017.474
267.717
1943.625
73021
27
5.06
Autryville
D
Feb15-June
153.3
0.93
15
127.569
645.4991
1 N
Sept -Apr
68.7
2.04
140.148
709.1489
267.717
1354.648
73021
28
1.96
Aut ille
D
Feb15-June
153.3
0.93
15
127.569
250.0352
N
Sept -Apr
68.7
2.04
140.148
274.6901
267.717
524.7253
73021
30
1.83
Rains
D
Feb15-June
153.3
0.93
15
127.569
233.4513
N
Se -Apr
68.7
2.04
140.148 1
256.4708
267.717
489.9221
73021
31
5.52
Rains
D
Feb15-June
153.3
0.93
15
127.569
704.1809
N
Se t-A r
68.7
2.04
140.148
773.617
267.717
1477.798
73021
32
5.5
Rains
D
Feb15-June
153.3
0.93
15
127.569
701.6295
N
Se t-A r
68.7
2.04
140.148
770.814
267.717
1472.444
73021
33
3.77
Rains
D
Feb15-June
153.3
0.93
15
127.569
480.9351
N
Se t-A r
68.7
2.04
140.148
528.358
267.717
1009.293
73021
34
5.56
Rains
D
Feb15-June
153.3
0.93
15
127.569
709.2836
N
Se t-A r
68.7
2.04
140.148
779.2229
267.717
1488.507
73021
35
6.89
Rains
D
Feb15-June
153.3
0.93
15
127.569
878.9504
N
Sept -Apr
68.7
2.04
140.148
965.6197
267.717
1844.57
73021
36
6.89
Rains
D
Feb15-June
153.3
1 0.93
15
127.569
878.9504
N
Sept -Apr
68.7
2.04
140.148
965.6197
267.717
1844.57
73021
37
6.89
Rains
D
Feb15-June
153.3
1 0.93
15
127.569
878.9504
N
Sept -Apr
68.7
2.04
140.148
965.6197
267.717
1844.57
73021
38
2.43
Torhunta
D
Feb15-June
153.3
0.93
15
127.569
309.9927
N
Sept -Apr
68.7
1 2.04
140.148
1 340.5596
267.717
650.5523
Totals: 163.03 20797.57 22848.33 43645.9
3(a) of 11

Reception Area Specifications Year 2 of 2 year crop rotation
Tract Field Irrigated Soil 1st Crop Time to 1st Crop 1st Crop Lbs N/Ac Lbs N Total Ibs N
Acreage Type Code Apply Yield Ibs N/Unit Residual /Ac Utilized
2nd Crop Time to 2nd Crop 2nd Crop Lbs NlAc Lbs N Total Ibs N
Code Apply, Yield lbs N/Unit Residual /Ac Utilized
" 0 0
Total
Lbs NIAc
147.42
Total Ibs N
Utilized
741.5226
73021
1
5.03
Autryville
O
Apr -Se t15
37.8
3.9
147.42
741.5226
73021
2
4.37
Autryville
O
A r-Se tl5
37.8
3.9
147.42
644.2254
*
0
0
147.42
644.2254
73021
3
1.57
Aut ille
O
Apr -Se t15
37.8
3.9
147.42
231.4494
*
0
0
147.42
231.4494
73021
4
4.78
Goldsboro
O
Apr-Sept15
37.8
3.9
147.42
704.6676
"
0
0
147.42
704.6676
73021
5
4.2
Goldsboro
O
A r-Sept15
37.8
3.9
147.42
619.164
"
0
0
147.42
619.164
73021
6
4.58
Goldsboro
O
A r-Se t15
37.8
3.9
147.42
675.1836
`
0
0
147.42
675.1836
73021
7
4.96
Goldsboro
O
APr-Septl5
37.8
3.9
147.42
731.2032
0
0
147.42
731.2032
73021
8
5.98
Goldsboro
O
Apr -Se 15
37.8
3.9
147.42
881.5716
*
0
0
147.42
881.5716
73021
9
2.11
Foreston
O
Apr-Seprtl5
37.8
3.9
147.42
311.0562
0
0
147.42
311.0562
73021
10
5.17
Foreston
O
A r-Sept15
37.8
3.9
147.42
762.1614
0
0
147.42
762.1614
73021
11
3.96
Foreston
O
Apr-Septl5
37.8
3.9
147.42
583.7832
*
0
0
147.42
583.7832
73021
12
6.58
Rains
O
Apr-Septl5
37.8
3.9
147.42
970.0236
0
0
147.42
970.0236
73021
13
5.73
Rains
O
Apr-Sept15
37.8
3.9
147.42
844.7166
0
0
147.42
844.7166
73021
14
1 6.56
Rains
O
Apr-Septl5
37.8
3.9
147.42
967.0752
'
0
0
147.42
967.0752
73021
15
2.16
Rains
0
Apr-Septl5
37.8
3.9
147.42
318.4272
'
0
0
147.42
318.4272
73021
16
3.32
Rains
O
Apr-Septl5
37.8
3.9
147.42
489.4344
0
0
147.42
489.4344
73021
17
2.61
Rains
O
A r-Se tl5
37.8
3.9
147.42
384.7662
0
0
147.42
384.7662
73021
18
2.69
Foreston
O
Apr-Septl5
37.8
3.9
147.42
396.5598
0
0
147.42
396.5598
73021
19
4.76
Foreston
O
A r-Se tl5
37.8
3.9
147.42
701.7192
0
0
147.42
701.7192
73021
20
3.4
Foreston
O
A r-Se tl5
37.8
3.9
147.42
501.228
0
0
147.42
501.228
73021
21
5.03
Rains
O
A r-Se t15
37.8
3.9
147.42
741.5226
"
0
0
147.42
741.5226
73021
22
3.78
Rains
O
37.8
3.9
147.42
557.2476
'
0
0
147.42
557.2476
73021
23
3.41
Rains
0
37.8
3.9
147.42
502.7022
0
0
147.42
502.7022
73021
25
6.73
Aut ille
O
37.8
3.9
147.42
992.1366
*
0
0
147.42
992.1366
73021
26
7.26
Aut ille
O
5
KApr-Sept15
37.8
3.9
147.42
1070.269
'
0
0
147.42
1070.269
73021
27
5.06
Aut ille
0
5
37.8
3.9
147.42
745.9452
0
0
147.42
745.9452
73021
28
1.96
Aut ille
0
5
37.8
3.9
147.42
288.9432
*
0
0
147.42
288.9432
73021
30
1.83
Rains
O
5
37.8
3.9
147.42
269.7786
*
0
0
147.42
269.7786
73021
31
5.52
Rains
O
A r-Se tl5
37.8
3.9
147.42
813.7584
`
0
0
147.42
813.7584
73021
32
5.5
Rains
0
A r-Se tl5
37.8
3.9
147.42
810.81
`
0
0
147.42
810.81
73021
33
3.77
Rains
0
A r-Se tl5
37.8
3.9
147.42
555.7734
0
0
147.42
555.7734
73021
34
5.56
Rains
O
A r-Se tl5
37.8
3.9
147.42
819.6552
*
0
0
147.42
819.6552
73021
35
6.89
Rains
0
A r-Se t15
37.8
3.9
147.42
1015.724
*
0
0
147.42
1015.724
73021
36
6.89
Rains
0
A r-Se tl5
37.8
3.9
147.42
1015.724
*
0
0
147.42
1015.724
73021
37
6.89
Rains
O
A r-Se tl5
37.8
3.9
147.42
1015.724
*
0
0
147.42
1015.724
73021
38
2.43
Torhunta
O
A r-Se tl5
37.8
3.9
147.42
358.2306
"
0
0
147.42
358.2306
O tional Crops:
73021
Any
Autryville
M
Marl5-Auq
56.7
1.75
99.26
0
73021
AnX
Foreston
M
Marl5-Aug
56.7
1.75
99.26
0
73021
Any
Goldsboro
M
Marl5-Au
56.7
1.75
99.26
0
73021
Any
Rains
M
Marl -A
56.7
1.75
99.26
0
73021
Any
Torhunta
M
Marl5-Aug
56.7
1.75
99.26
0
73021
Any
Any
CC
Sept -Apr
1.0
30
30
0
Totals: 163.03 24033.88 0 24033.88
3(b) of 11

Reception Area Specifications Optional: AerwayAcres/Crops
Tract Field Irrigated Soil 1st Crop Time to 1st Crop 1st Crop Lbs NIAc Lbs N Total Ibs N
Acreage Type Code Apply Yield Ibs N/Unit Residual /Ac Utilized
2nd Crop Time to 2nd Crop 2nd Crop Lbs N/Ac Lbs N Total Ibs N
Code Apply Yield Ibs N/Unit Residual /Ac Utilized
Total
Lbs N/Ac
Total Ibs N
Utilized
73021
Subl
4.01
Autryville
D
Febl5-June
153.3
0.93
15
127.569
511.5517
N
Sept -Apr
68.7
2.04
140.148
561.9935
267.717
1073.645
73021
Sub2
5.6
Goldsboro
D
Feb15-June
153.3
0.93
15
127.569
714.3864
N
Sept -Apr
68.7
2.04
140.148
784.8288
267.717
1499.215
73021
Sub3-6
2.56
Foreston
D
Febl5-June
153.3
0.93
15
127.569
326.5766
N
Sept -Apr
68.7
2.04
140.148
358.7789
267.717
685.3555
73021
Sub4-5
8.75
Rains
D
Febl5-June
153.3
0.93
15
127.569
1116.229
N
Se t-A r
68.7
2.04
140.148
1226.295
267.717
2342.524
73021
Sub7
3.37
Rains
D
Febl5-June
153.3
0.93
15
127.569
429.9075
N
Sept -Apr
68.7
2.04
140.148
472.2988
267.717
902.2063
73021
Sub8-9g7.6
Aut ille
D
Febl5-June
153.3
0.93
15
127.569
479.6594
N
Sept -Apr
68.7
2.04
140.148
526.9565
267.717
1006.616
73021
Sub10Aut
ille
D
Febl5-June
153.3
0.93
15
127.569
200.2833
N
Sept -Apr
68.7
2.04
140.148
220.0324
267.717
420.3157
73021
Subl 1Rains
D
Febl5-June
153.3
0.93
15
127.569
459.2484
N
Se t-A r
68.7
2.04
140.148
504.5328
267.717
963.7812
73021
Sub12-13Rains
D
Febl5-June
153.3
0.93
15
127.569
517.9301
N
Sept -Apr
68.7
2.04
140.148
569.0009
267.717
1086.931
73021
Sub14Torhunta
D
Febl5-June
153.3
0.93
15
127.569
191.3535
N
Sept -Apr
68.7
2.04
140.148
210.222
267.717
401.5755
73021
Sub16Rains
D
Febl5-June
153.3
0.93
15
127.569
978.4542
N
Sept -Apr
68.7
2.04
140.148
1074.935
267.717
2053.389
73021
Subl
4.01
Autryville
O
A r-Sept15
37.8
3.9
147.42
591.1542
`
0
0
147.42
591.1542
73021
Sub2
5.6
Goldsboro
O
Apr -Se tl5
37.8
3.9
147.42
825.552
0
0
147.42
825.552
73021
Sub3-6
2.56
Foreston
O
A r-Se t15
37.8
3.9
147.42
377.3952
0
0
147.42
377.3952
73021
Sub4-5
8.75
Rains
O
A r-Septl5
37.8
3.9
147.42
1289.925
0
0
147.42
1289.925
73021
Sub7
3.37
Rains
O
A r-Se tl5
37.8
3.9
147.42
496.8054
0
0
147.42
496.8054
73021
Sub8-9
3.76
Autryville
O
A r-Se tl5
37.8
3.9
147.42
554.2992
0
0
147.42
554.2992
73021
Sub10
1.57
Autr&ille
O
Apr-Septl5j
37.8
3.9
147.42
231.4494
0
0
147.42
231.4494
73021
Subl1
3.6
Rains
O
Apr-Septl5l
37.8
3.9
147.42
530.712
0
0
147.42
530.712
73021
Sub12-13
4.06
Rains
O
Apr-Septl5l
37.8
3.9
147.42
598.5252
0
0
147.42
598.5252
73021
Sub14
1.5
Torhunta
O
A r-Se t15
37.8
3.9
147.42
221.13
`
0
0
147.42
221.13
73021
Subl6
7.67
Rains
O
A r-Se t15
37.8
3.9
147.42
1130.711
`
0
0
147.42
1130.711
73021
Sub1
4.01
Autryvllle
M
Marl5-Aug
56.7
1.75
99.26
398.0326
0
0
99.26
398.0326
73021
Sub2
5.6
Goldsboro
M
Marl5-Auq
56.7
1.75
99.26
555.856
0
0
99.26
555.856
73021
Sub3-6
2.56
Foreston
M
Marl5-Auu
56.7
1.75
99.26
254.1056
0
0
99.26
254.1056
73021
Sub4-5
8.75
Rains
M
Marl 5-Aug
56.7
1.75
99.26
1 868.525
0
0
99.26
868.525
73021
3.37
Rains
M
Marl5-Au
56.7
1.75
99.26
334.5062
0
0
99.26
334.5062
73021
3.76
Aut ille
M
Marl5-62
56.7
1.75
99.26
373.2176
0
0
99.26
373.2176
73021
1.57
Aut ille
M
Marl5-Au
56.7
1.75
99.26
155.8382
0
0
99.26
155.8382
73021
Subl
dSubl2-13
3.6
Rains
M
Marl5-Au
56.7
1.75
99.26
357.336
0
0
99.26
357.336
73021
4.06
Rains
M
Marl5-Au
56.7
1.75
99.26
402.9956
0
0
99.26
402.9956
73021
1.5
Torhunta
M
Marl5-Au
56.7
1.75
99.26
148.89
0
0
99.26
148.89
73021
7.67
Rains
M
Marl5-Au
56.7
1.75
99.26
761.3242
`
0
0
99.26
761.3242
73021
Any
Any
CC
Sept -Apr
1.0
30
30
0
Totals: 46.45 5925.58 6509.8T5 12435.45
3(c) of 11

This plan does not include commercial fertilizer. The farm should produce adequate plant
available nitrogen to satisfy the requirements of the crops listed above.
The applicator is cautioned that P and K may be over applied while meeting the N requirements.
In the future, regulations may require farmers in some parts of North Carolina to have a nutrient
management plan that addresses all nutrients. This plan only addresses nitrogen.
In interplanted fields ( i.e. small grain, etc, interseeded in bermuda), forage must be removed
through grazing, hay, and/or silage. Where grazing, plants should be grazed when they
reach a height of six to nine inches. Cattle should be removed when plants are grazed to a
height of four inches. In fields where small grain, etc, is to be removed for hay or silage, care
should be exercised not to let small grain reach maturity, especially late in the season (i.e.
April or May). Shading may result if small grain gets too high and this will definitely interfere
with stand of bermudagrass. This loss of stand will result in reduced yields and less nitrogen
being utilized. Rather than cutting small grain for hay or silage just before heading as is
the normal situation, you are encouraged to cut the small grain earlier. You may want to
consider harvesting hay or silage two to three times during the season, depending on the
time small grain is planted in the fall.
The ideal time to interplant small grain, etc, is late September or early October. Drilling is
recommended over broadcasting. Bermudagrass should be grazed or cut to a height of
about two inches before drilling for best results.
CROP CODE LEGEND
Crop Code Crop
A
Barley
B
Grazed Hybrid Bermudagrass
C
Hybrid Bermudagrass Hay
B/C
Comb. Hybrid Bermudagrass
D
Corn - Grain
E
Corn - Silage
F
Cotton
G
Grazed Fescue
H
Fescue Hay
I
Oats
J
Rye
K
Grazed Overseed
L
Overseed Hay
M
Grain Sorghum
N
Wheat
O
Soybean
P
Pine Trees
S
Small Grain
CC
Cover Crop
Description -Harvested As
Grain Crop
Pasture/Grazed
Hay
Graze/Hay Combination
Grain Crop
Silage
Cotton Lint
Pasture/Grazed
Hay
Grain Crop
Grain Crop
Pasture/Grazed (Seeded in Bermudagrass)
Hay (Seeded in Bermudagrass)
Grain Crop
Grain Crop
Grain Crop
Pine Trees
Grain Crop/ Hay (After Grain Crop)
Not Harvested; Burned/Disked In
Acres shown in the preceding table are considered to be the usable acres excluding
required buffers, filter strips along ditches, odd areas unable to be irrigated, and perimeter areas
not receiving full application rates due to equipment limitations. Actual total acres in the fields
listed may, and most likely will be, more than the acres shown in the tables.
See attached map showing the fields to be used for the utilization of animal waste.
4of11

SLUDGE APPLICATION:
The following table describes the annual nitrogen accumulation rate per animal
in the lagoon sludge
Farm Specifications
PAN/ r/animal Farm Total/yr
Farrow to Wean
0.8
Farrow to Feeder
0.96
Farrow to Finish
3.9
Wean to Feeder
0.07
14375 Wean to Finish
0.27 3881.25
Feeder to Finish
0.34
Gilts
0.39
Boars
0.55
The waste utilization plan must contain provisions for periodic land application of sludge at
agronomic rates. The sludge will be nutrient rich and will require precautionary measures to
prevent over application of nutrients or other elements. Your production facility will produce
approximately 3881.25 pounds of plant available nitrogen per year and will accumulate in the lagoon
sludge based on the rates of accumulation listed above.
If you remove the sludge every 5 years, you will have approximately 19406.25 pounds of plant
available nitrogen to utilize. Assuming you apply this PAN to hybrid bermuda grass hayland at the
rate of 300 pounds of nitrogen per acre, you will need 64 acreas of land. If you apply the sludge
to corn at a rate of 125 pounds per acre, you will need 155.25 acres of land. Please note that these
are only estimates of the PAN produced and the land required to utilize that PAN. Actual values
may only be determined by sampling the sludge for plant available nitrogen content prior to application
Actual utilization rates will vary with soil type, crop, and realistic yield expectations for the specific
application fields designated for sludge application at time of removal.
APPLICATION OF WASTE BY IRRIGATION:
The irrigation application rate should not exceed the intake rate of the soil at the time of irrigation
such that runoff or ponding occurs. This rate is limited by initial soil moisture content, soil
structure, soil texture, water droplet size, and organic solids. The application amount should not
exceed the available water holding capacity of the soil at the time of irrigation nor should the
plant available nitrogen applied exceed the nitrogen needs of the crop.
If surface irrigation is the method of land application for this plan, it is the responsibility of the
producer and irrigation designer to ensure that an irrigation system is installed to properly
irrigate the acres shown in the preceding table. Failure to apply the recommended rates and
amounts of nitrogen shown in the tables may make this plan invalid.
*This is the maximum application amount allowed for the soil assuming the amount
of nitrogen allowed for the crop is not over applied. In many situations, the application
amount shown cannot be applied because of the nitrogen limitation. The maximum
application amount shown can be applied under optimum soil conditions.
Your facility is designed for >180 days of temporary storage and the temporary storage must
be removed on the average of once every 6 months. In no instance should the volume of the
waste stored in your structure be within the 25 year 24 hour storm storage or one foot of
freeboard except in the event of the 25 year 24 hour storm.
It is the responsibility of the producer and waste applicator to ensure that the spreader equipment
is operated properly to apply the correct rates to the acres shown in the tables. Failure to apply
the recommended rates and amounts of nitrogen shown in the tables may make this plan invalid.
Call your technical specialist after you receive the waste analysis report for assistance in
determining the amount of waste per acre and the proper application prior to applying the waste.
5 of 11

Application Rate Guide
The following is provided as a guide for establishing application rates and amounts.
Soil
Application Rate
Application Amount
Tract
Hydrant
Type
Crop
in/hr
* inches
73021
1
Autryville
D
0.6
1
73021
2
Autryville
D
0.6
1
73021
3
Autryville
D
0.6
1
73021
4
Goldsboro
D
0.4
1
73021
5
Goldsboro
D
0.4
1
73021
6
Goldsboro
D
0.4
1
73021
7
Goldsboro
D
0.4
1
73021
8
Goldsboro
D
0.4
1
73021
9
Foreston
D
0.5
1
73021
10
Foreston
D
0.5
1
73021
11
Foreston
D
0.5
1
73021
12
Rains
D
0.4
1
73021
13
Rains
D
0.4
1
73021
14
Rains
D
0.4
1
73021
15
Rains
D
0.4
73021
16
Rains
D
0.4
1
73021
17
Rains
D
0.4
1
73021
18
Foreston
D
0.5
1
73021
19
Foreston
D
0.5
1
73021
20
Foreston
D
0.5
1
73021
21
Rains
D
0.4
1
73021
22
Rains
D
0.4
1
73021
23
Rains
D
0.4
1
73021
25
Autryville
D
0.6
1
73021
26
Autryville
D
0.6
1
73021
27
Autryville
D
0.6
1
73021
28
Autryville
D
0.6
1
73021
30
Rains
D
0.4
1
73021
31
Rains
D
0.4
1
73021
32
Rains
D
0.4
1
73021
33
Rains
D
0.4
1
73021
34
Rains
D
0.4
1
73021
35
Rains
D
0.4
1
73021
36
Rains
D
0.4
1
73021
37
Rains
D
0.4
i
73021
38
Torhunta
D
0.45
1
6 of 11

Additional Comments:
This plan revised to reflect the current production and application rates as
listed on the NCSU Nutrient Management website.
Aerway acres are the remaining acres in a field not covered by the irrigation
reels but covered when using an aerway machine. These acres are optional.
Grain sorghum may be substituted for soybeans if desired.
If a cover crop is planted, the total amount of PAN applied to the cover crop
must be deducted from the following crops starting PAN rate.
This revision done 12/15/2023 to reflect the addition of a digester, the removal
pull 24, the extension of pulls 25 & 26, and the combination of sub8 & sub9
into sub8-9.
7of11

NUTRIENT UTILIZATION PLAN CERTIFICATION
Name of Farm: Scott Farm; Fac. No.: 31-5
Owner: Murphy -Brown, LLC dba Smithfield Hog Production
Manager:
Owner/Manager Agreement:
I/we understand and will follow and implement the specifications and the operation and
maintenance procedures established in the approved animal waste nutrient management
plan for the farm named above. I/we know that any expansion to the existing design capacity
of the waste treatment and/or storage system, or construction of new facilities, will require a
new nutrient management plan and a new certification to be submitted to DWR before the new
animals are stocked.
/we understand that I must own or have access to equipment, primarily irrigation equipment,
to land apply the animal waste described in this nutrient management plan. This equipment
must be available at the appropriate pumping time such that no discharge occurs from the lagoon
in the event of a 25 year 24 hour storm. I also certify that the waste will be applied on the land
according to this plan at the appropriate times and at rates which produce no runoff.
This plan will be filed on site at the farm office and at the office of the local Soil and Water
Conservation District and will be available for review by NCDW R upon request.
Name of Facility Owner: Murphy -Brown, LLC dba Smithfield Hog Production
Signature:
Date
Name of Manager (if different from owner):
Signature:
Date
Name of Technical Specialist: M. Kevin Weston
Affiliation: Murphy -Brown, LLC.
Address: 2822 Hwy 24 West, PO Drawer 856
Warsaw, NC 28398
Telephone: [phone]
Signature:
�T Date
8of11

NUTRIENT UTILIZATION PLAN
REQUIRED SPECIFICATIONS
Animal waste shall not reach surface waters of the state by runoff, drift, manmade
conveyances, direct application, or direct discharge during operation or land application.
Any discharge of waste which reaches surface water is prohibited.
There must be documentation in the design folder that the producer either owns or has an
agreement for use of adequate land on which to properly apply the waste. If the producer
does not own adequate land to properly dispose of the waste, he/she shall provide
evidence of an agreement with a landowner, who is within a reasonable proximity,
allowing him/her the use of the land for waste application. It is the responsibility of the
owner of the waste production facility to secure an update of the Nutrient Utilization Plan
when there is a change in the operation, increase in the number of animals, method of
application, recieving crop type, or available land.
Animal waste shall be applied to meet, but not exceed, the nitrogen needs for realistic
crop yields based upon soil type, available moisture, historical data, climatic conditions,
and level of management, unless there are regulations that restrict the rate of applications
for other nutrients.
Animal waste shall be applied to land eroding less than 5 tons per acre per year. Waste
may be applied to land eroding at more than 5 tons per acre per year but less than 10 tons
per acre per year provided grass filter strips are installed where runoff leaves the field
(See USDA, NRCS Field Office Technical Guide Standard 393 - Filter Strips).
Odors can be reduced by injecting the waste or disking after waste application. Waste
should not be applied when there is danger of drift from the land application field.
When animal waste is to be applied on acres subject to flooding, waste will be soil
incorporated on conventionally tilled cropland. When waste is applied to conservation tilled
crops or grassland, the waste may be broadcast provided the application does not occur
during a season prone to flooding (See "Weather and Climate in North Carolina" for
guidance).
Liquid waste shall be applied at rates not to exceed the soil infiltration rate such that runoff
does not occur offsite or to surface waters and in a method which does not cause drift
from the site during application. No ponding should occur in order to control odor and
flies.
8 Animal waste shall not be applied to saturated soils, during rainfall events, or when the
surface is frozen.
9 of 11

NUTRIENT UTILIZATION PLAN
REQUIRED SPECIFICATIONS
Animal waste shall be applied on actively growing crops in such a manner that the crop is not
covered with waste to a depth that would inhibit growth. The potential for salt damage from
animal waste should also be considered.
10 Nutrients from waste shall not be applied in fall or winter for spring planted crops on soils with a
high potential for leaching. Waste/nutrient loading rates on these soils should be held to a
minimum and a suitable winter cover crop planted to take up released nutrients. Waste shall
not be applied more than 30 days prior to planting of the crop or forages breaking dormancy.
11 Any new swine facility sited on or after October 1, 1995 shall comply with the following: The
outer perimeter of the land area onto which waste is applied from a lagoon that is a component of
a swine farm shall be at least 50 feet from any residential property boundary and canal. Animal
waste, other than swine waste from facilities sited on or after October 1, 1995, shall not be
applied closer than 25 feet to perennial waters.
12 Animal waste shall not be applied closer than 100 feet to wells.
13 Animal waste shall not be applied closer than 200 feet of dwellings other than those owned by
the landowner.
14 Waste shall be applied in a manner not to reach other property and public right-of-ways.
15 Animal waste shall not be discharged into surface waters, drainageways, or wetlands by discharge
or by over -spraying. Animal waste may be applied to prior converted cropland provided the fields
have been approved as a land application site by a "technical specialist". Animal waste shall not
be applied on grassed waterways that discharge directly into water courses, and on other grassed
waterways, waste shall be applied at agronomic rates in a manner that causes no runoff or drift
from the site.
16 Domestic and industrial waste from washdown facilities, showers, toilets, sinks, etc., shall not be
discharged into the animal waste management system.
10 of 11

NUTRIENT UTILIZATION PLAN
REQUIRED SPECIFICATIONS
17 A protective cover of appropriate vegetation will be established on all disturbed areas (lagoon
embankments, berms, pipe runs, etc.). Areas shall be fenced, as necessary, to protect the
vegetation. Vegetation such as trees, shrubs, and other woody species, etc., are limited to areas
where considered appropriate. Lagoon areas should be kept mowed and accessible. Berms and
structures should be inspected regularly for evidence of erosion, leakage, or discharge.
18 If animal production at the facility is to be suspended or terminated, the owner is responsible for
obtaining and implementing a "closure plan" which will eliminate the possibility of an illegal
discharge, pollution and erosion.
19 Waste handling structures, piping, pumps, reels, etc., should be inspected on a regular basis to
prevent breakdowns, leaks and spills. A regular maintenance checklist should be kept on site.
20 Animal waste can be used in a rotation that includes vegetables and other crops for direct human
consumption. However, if animal waste is used on crops for direct human consumption, it should
only be applied pre -plant with no further applications of animal waste during the crop season.
21 Highly visible markers shall be installed to mark the top and bottom elevations of the temporary
storage (pumping volume) of all waste treatment lagoons. Pumping shall be managed to
maintain the liquid level between the markers. A marker will be required to mark the maximum
storage volume for waste storage ponds.
22 Waste shall be tested within 60 days of utilization and soil shall be tested at least annually at crop
sites where waste products are applied. Nitrogen shall be the rate -determining nutrient, unless
other restrictions require waste to be applied based on other nutrients, resulting in a lower
application rate than a nitrogen based rate. Zinc and copper levels in the soil shall be monitored
and alternative crop sites shall be used when these metals approach excessive levels. pH shall be
adjusted and maintained for optimum crop production. Soil and waste analysis records shall be
kept for a minimum of five years. Poultry dry waste application records shall be maintained for a
minimum of three years. Waste application records for all other waste shall be maintained for a
minimum of five years.
23 Dead animals will be disposed of in a manner that meets North Carolina regulations.
11 of 11

AWS310005

Scott Farm
Foe. No.: 31-
D19-19F, Add't
13,�N
Well
w/100'
Offset
Pull Acres
1 5.03
2 4.37
3 1.57
4 4.78
5 4.20
6 4.58
7 4.96
8 5.98
9 2.11
10 5.17
11 3.96
12 6.58
13 5.73
14 6.56
15 2.16
16 3.32
17 2.61
18 2.69
19 4.76
20 3.40
21 5.03
22 3.78
23 3.41
25 6.73
26 7.26
27 5.06
28 1.96
30 1.83
31 5.52
32 5.50
33 3.77
34 5.56
35 6.89
36 6.89
37 6.89
38 2.43
Total 163.03
Specifications:
Ag Rain Reels w Nelson 150
w/1.18" Nozzle ® 60 PSI
315' WD; 229 GPM
Wellf�i`�

26
N O
a
Tie into existing 20 N�
main line here 9
27 N 19
$ 10 N
28
18
c 11
12
17 21
N 22
2
16 3
13
4 N 15 30 2OD,
�? 14 _
5
GRAPHIC SCALE
600 0 300 600 1200
( IN FEET )
1 inch = 600 ft.
12/2023-Removed pull 24, extended pulls 25 do 26
and Added Digester
5/7/2015-Added Sub 16 Acreage to Map

Scott Form
Foe, Na: 31-5
D%mtw Add't.
PG' Well
1ko,$ w/100'
Offset
0
011
y�e �
`31 Total Fid 14 = 3.93 Ac.
Wetted = 2.43 Ac.
F-Sub 14 = 1.50 Ac.
Well
w/100'
Offset
Total Fld 8-9 = 17.75 Ac.
Wetted = 13.99 Ac.
Sub 8-9 = 3.76 Ac.,,-,,
ID
9 Pc
�
�O �2 P°c•
Well
w/100'
Offset
0
tN o
e" of
� m
a
Total Fid 3-6 = 24.65 Ac.
� Wetted = 22.09 Ac.
1 Sub 3-6 = 2.56 Ac.
E15
v
Total Fld 4-5 = 35.71 Ac.
Wetted = 26.96 Ac. wc
Sub 4-5 = 8.75 Ac.
Total Rd 2 = 30.10 Ac.
Wetted = 24.50 Ac.
Sub 2 = 5.60 Ac.
Total Fid 12-13 = 34.06 Ac.
Wetted = 30.00 Ac.
Sub 12-13 = 4.06 Ac.
Sub 16 = 7.67 Ac.
GRAPHIC SCALE
60D 0 300 600 1200
( IN FEET) 12/2023—Removed pull 24, extended pulls 25 & 26
end Added Digester
1 inch = 600 ft.. 5/7/2015—Added Sub 16 Acreage to Map

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WASTE -TO -ENERGY SYSTEM
OPERATION & MAINTENANCE MANUAL
November 11 2021

Table of Contents
I. Definitions.......................................................................................................................................... 3
II. Introduction.......................................................................................................................................... 4
III. Operational Components of the Waste -to -Energy System............................................................. 4
1) Gravity Collection Pipe............................................................................................................. 4
2) Lift Station (where applicable)................................................................................................. 5
3) Anaerobic Digester................................................................................................................ 5
4) Mixing Pump Station................................................................................................................ 5
5) Level Control Station (where applicable)............................................................................... 5
6) Effluent Storage Pond................................................................................................................ 6
7) Biogas Conditioning System...................................................................................................... 6
8) Emergency Vent......................................................................................................................... 6
9) Transfer Pump........................................................................................................................... 6
10) Rainwater Removal Pump......................................................................................................... 7
IV. General Maintenance......................................................................................................................... 7
V. Safety..................................................................................................................................................... 7
VI. Spill Prevention and Control................................................................................................................ 7
Appendix A — Responsibilities
I. Farm Production Personnel............................................................................................................... 8
II. Land & Nutrient Management Personnel (LNM)........................................................................... 9
III. Regional Maintenance Department............................................................................................... 10
IV. Contractor........................................................................................................................................... 11
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Definitions
1) 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.
2) Anaerobic Digester (aka Digester)- A covered containment that holds the wastewater for anaerobic
digestion.
3) 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.
4) Gas Upgrading System (GUS) — Final processing for commercial pipeline quality gas
5) Gas gathering equipment — Consists of the Biogas Conditioning System, biogas gathering pipelines,
and Upgrading System (GUS)
6) Immediately —Within 15 minutes of knowledge
7) Wet well — Concrete structure that holds water
8) Effluent Storage Pond (aka lagoon) —Used to store the treated effluent from the Digester
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Introduction
The Waste -to -Energy project uses anaerobic digestion of hog waste (aka 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. The farm site includes
gravity collection piping from the barns, an Anaerobic Digester (Digester), a Mixing Pump Station, a Biogas
Conditioning System to remove moisture, an Emergency Vent, and a biogas transfer pipe leading to the
Gas Upgrading System (GUS).
The Digester at the farm site includes an HDPE membrane cover to capture the biogas generated by the
anaerobic digestion process. The Digester is partially mixed by pumping and provides sufficient detention
time to effectively reduce the volatile suspended solids in the waste by digestion. The reduction of
volatile solids through microbial processes produces an energy -rich biogas, which is a valuable commodity.
The Digester operates differently at certain temperature ranges. The Digester as installed is an ambient
temperature Digester. There are no heating devices to control the temperature in the Digester, the depth
of the Digester and the ground temperature will buffer the swing in temperature due to the outside
climate. The expected gas production from the Digester will fluctuate with the seasons, methane
production will almost stop when the temperature in the Digester drops below 50 degrees (F) and will
peak in the summer months.
There are two (2) types of solids found in hog waste: organic and inorganic.
1. The organic solids will break down and decompose by biochemical reduction. The bacteria that are
grown and maintained in the system is harmless anaerobic and aerobic bacteria. Bound oxygen can
be found in nitrates, a compound that results from the aeration process. These same bacteria are
provided by nature and are found in streams, lakes, and in the soil to destroy dead plants and animals.
The difference is that a Waste -to -Energy System treatment process has provided an ideal environment
for a concentration of these bacteria to feed and grow; thus, the biological action is greatly
accelerated. The hog waste is the food for the bacteria in the system. The Digester contains certain
populations of bacteria that do not require the presence of oxygen.
2. The inorganic solids are "non -treatable," but they are normally present in such small quantities that
they are considered insignificant in the treatment process.
The loading rate of the Digester will not be strictly controlled. There is no change in the flush routine of
the current farm operations; a continuous and consistent stream of hog waste is the best method
available of loading the Digester. Total solids account for approximately 1% of the influent content,
varying with the stocking density and the age of the animals. The Digester is constructed to be air -tight;
the lack of oxygen will facilitate the growth of methanogenic bacteria.
III. Operational Components of the Waste -to -Energy System
Below are listed the major component operations.
1) Gravity Collection Pipe
The gravity collection pipe receives the flushed waste from the hog barns and directs that waste to a
lift station or directly into the Digester via gravity. During normal operation, the pipe should be free
flowing, with no clogs, in order to transport the waste. The gravity collection pipe includes a series of
cleanouts that provide access to the gravity collection pipe for removal of a clog or blockage.
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2) Lift Station, where applicable
The Lift Station receives waste from the gravity collection pipe and pumps that waste to the Digester
via buried forced main. The waste enters the Digester at the opposite end of the Digester from the
Level Control System (so "new" waste must flow through the curtain baffle system of the Digester,
resulting in effective treatment of the waste).
During normal operation, the Lift Station will run based on the liquid level in the pump tank, which is
triggered by floats. The Lift Station will be inspected per procedure by the farm manager, or their
designee, to ensure the pumps are operating to indicate proper flushing. The Lift Station is equipped
with alarms.
Reference the Smithfield Hog Production Lift Station Manual for proper operation and maintenance of
the lift station.
NOTE: Some farms do not have Lift Stations, rather than using a Lift Station, the waste flows from the
hog barns to the Mixing Pump Station or flows directly into the Digester via gravity.
3) Anaerobic Digester (aka Digester)
The Digester receives the 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,
biogases (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. The gases
are collected in perforated piping underneath the cover, which are connected to a main pipe that
connects to the conditioning system. The waste is held for approximately 45 days to allow the
biological process to complete. The sludge that settles at the bottom of the Digester will be
periodically removed, based on the annual sludge survey.
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 (no more
than 10% of the top of the Digester should be covered by rainwater) and should not show signs of
any damage or leaks. The presence of an unusual odor (rotten eggs), or wastewater on the cover
may indicate that there is a leak. If such odors or wastewater are observed, the Environmental
Emergency Contact Plan should be activated immediately. Temporary repairs should be followed
with a permanent repair as soon as possible. Documented tracking of the repair process is required.
(i.e., a work order).
4) Mixing Pump Station
The Mixing Pump Station slowly mixes the waste that has been collected in the 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 Digester. The Mixing Pump Station is equipped with an audible and visual alarm.
5) Level Control Station, where applicable
The Level Control Station receives treated waste from the Digester and conveys that waste to the
Effluent Storage Pond. The gravity outlet of the Digester leads to the inlet of the Level Control
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Station, and the invert is set at the freeboard of the Digester so that the Digester maintains a
constant level. The staff gauge for indicating the liquid level of Digester is located in the wet well of
the Level Control Station. The liquid level is visually inspected at least daily by farm personnel for
unexplained changes. Any unexplained changes in liquid level of two or more inches, should initiate
the Environmental Emergency Contact Plan. The Level Control Station is equipped with an audible
and visual alarm.
6) Effluent Storage Pond
The treated waste from the Digester flows from the Digester outlet pipe to the Effluent Storage Pond.
The Effluent Storage Pond is used to store the treated effluent after anaerobic digestion. However, as
this is a critical part of the integrated system, any abnormal operation of the Effluent Storage Pond
observed by farm or LNM personnel, such as seepage and/or unexplained liquid level changes of two
or more inches, should be documented and immediate corrective action taken.
7) Biogas Conditioning System
The Biogas Conditioning System receives biogas from the Digester and removes moisture from the
biogas by means of compression and heat exchangers.
This system will be managed by a contractor, but the information is included in this O&M manual for
reference.
The biogas from the Digester is commonly at 100% relative humidity; the biogas is purported to be
near 6% relative humidity after going through the Biogas Conditioning System. The biogas is moved
through the biogas transfer pipe to the Gas Upgrading System (GUS)
During normal operation, the conditioning system should run without any need for input from the
contractor. The discharge pressure and flow rate can be manipulated by the contractor through
adjustment of the pressure regulator on the bypass line and through adjustment of the variable
frequency drive. As the conditioning system approaches this setpoint, it will automatically reduce
compressor speed to seek a flowrate that matches the biogas production. If the vacuum pressure
exceeds the setpoint, the conditioning system will shut down and trigger an alarm to the contractor
via telemetry system.
8) Emergency Vent
In times of need, such as failure of the biogas conveyance pipeline, the Emergency Vent is operated by
trained personnel to consume excess accumulated biogas from the Digester. The Emergency Vent is
not an automated system, and the trained operator must articulate the biogas piping control valving
to direct biogas from the Digester to the Emergency Vent for release.
9) Transfer Pump, if applicable
The Transfer Pump transfers accumulated effluent among available Effluent Storage Ponds to optimize
storage. The Transfer Pumps are operated through use of a local disconnect. Under normal
circumstances, the Transfer Pump will only be used as needed.
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10) Rainwater Removal Pump
A designated pump is located at each Digester site to remove accumulated rainwater from the cover
of the Digester. In order for the Digester dike to not be jeopardized, the pump outlet should reach
beyond the toe of the Digester dike. Rainwater should be pumped on to a grassy area, if possible.
IV. General Maintenance
Maintenance should be performed to evaluate the performance of the Waste -to -Energy System.
A well -operated, properly adjusted, system will exhibit the following visible signs of proper maintenance:
• All pipes should be intact and watertight.
• The pumps appear to be operating properly (nearly silent with little to no vibrations)
• The Digester cover should be free of excessive accumulation of rainwater
• The Digester cover should be free of any tears, punctures, or failures
• There should be no unusual odors (rotten eggs) coming from the Digester or Emergency Vents.
• The Effluent Storage Pond should be structurally sound, free of floating debris, and within permitted
liquid level
For optimum system operation and maximum treatment efficiency, daily visual inspection of alarms, by
production personnel, is necessary. In addition to the daily visual inspection, all mechanical equipment
(Mixing Station pumps, Level Control pumps, Lift Station pumps, and Transfer Pumps) should be cleaned
and lubricated as needed. At least quarterly mechanical equipment valves need to be performance
tested. The maintenance for the mechanical equipment will be managed by the Regional Maintenance
Department.
V. Safety
Reference Lagoon Safety Policy (SIPS 8.1)
VI. Spill Prevention and Control
Audible and visible alarms are present at the following controls stations: Mixing Pump Station, Lift
Station, and Level Control Station. The alarms are tested for proper operation per design periodically
by production personnel or the Land & Nutrient Management Department.
The Environmental Emergency Contact Plan provides spill control instructions and contact
information.
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Appendix A — Responsibilities
Farm Production Personnel
1. Organic Loading
The normal operations of the farm site for the Digester includes animal waste, feed spilled in pit by animals,
and water. The control of fresh water into the pit is important. Water leaks in the barn or malfunctioning
nipples need to be repaired in a timely manner. Ensure there are not blockages in the flush lines that impede
the flow of fresh waste to the Digester.
2. Hydraulic Loading
During times of cleaning and disinfecting a barn, solutions with chlorinated compounds (bleach) or quaternary
ammonium inhibit anaerobic digestion. Also, the common use of lime in the disinfecting process causes a
disruption in alkalinity in the Digester that harm methane forming bacteria.
3. Digester Level Control
A liquid level gauge will be located in the wet well at the Level Control Station. Daily the farm manager, or
their designee will need to record liquid level of the Digester. If there is an unexplained level in the Digester of
two or more inches, the Environmental Emergency Contact Plan will be activated.
4. Lift Station Maintenance, if applicable
Periodic cleaning of the Lift Station is necessary to remove debris and maintain the free flow of wastewater to
the Digester. The emergency alarm is tested per procedures. Refer to the Smithfield Hog Production Lift
Station Manual.
5. Daily Inspections
The farm manager or their designee will document daily the inspection of the following Waste -to -Energy
components:
• Gravity collection pipe cleanouts
• Mixing Pump Station alarm
• Digester liquid level
• Level Control Station alarm
• Lift Station
• Waste Storage Pond liquid level
6. Emergency Response
The farm manager, or their designee will immediately activate the Environmental Emergency Contact Plan
posted on site, in the event of emergency alarm activation, unexplained liquid level change in Digester and/or
Effluent Storage Pond or noticeable difference in normal operation of the Waste -to -Energy system
components located on the farm site.
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II. Land & Nutrient Management Personnel (LNM)
1. Digester Cover Waste Removal
Any liquid on the Digester cover should be inspected to make sure it is clean and clear. If wastewater is
detected on the cover, pump all water present on the cover back into the Level Control Station wet well or the
Lift Station, and activate the Environmental Emergency Contact Plan.
2. Digester Cover Rainwater Removal
Removal of rainwater from the Digester cover is necessary to help maintain cover integrity, and to help with
the digestion process. (Reference Smithfield Hog Production Policy/Procedure #MB 031). Rainwater will be
removed by a pump designated for the Digester. In order for the Digester dike to not be jeopardized, the
pump outlet should reach beyond the Digester dike. Rainwater should be pumped on to a grassy area, if
possible.
3. Weekly Inspections
Document on the Weekly LNM Inspection:
• Pumps/pipes into and out of Digester and waste storge pond
• Digester cover integrity
• Digester and waste storage pond dike integrity
• Digester cover inflation
• Rainwater accumulation on Digester cover
4. Effluent Storage Pond
• Record the liquid level weekly
5. Transfer Pump
• Operate the Transfer Pump as needed
6. General Maintenance
• Keep area around Digester mowed. Mowing activity must be regimented around the Digester cover to
guard against propelling debris towards the cover.
• Check the Digester cover after a rain event, and pump off excess rainwater, if necessary.
• Monitor liquid level in Digester, per design. Use the staff gauge located in Level Control Station wet well
to assess levels.
• Inspect Level Control Station for proper operation, visually check for blockages.
• Inspect waste outlet pipes from the Digester to the Effluent Storage Pond at least weekly for leaks.
• Check Mixing Pump Station and Level Control Station alarms at least weekly for properly operation as
designed.
7. Emergency Response
• Activate the Environmental Emergency Contact Plan if there is an unexplained change in cover inflation
level.
• Maintain emergency contacts for the Waste -to -Energy System components located on the farm site.
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III. Regional Maintenance Department
1. Mechanical Equipment Maintenance
Perform maintenance tasks for the mechanical equipment per the preventive maintenance schedule.
2. Emergency Response
Activate the Environmental Emergency Contact Plan in the event of abnormal operation of the Waste -to -
Energy System components located on the farm site. (i.e., suspect waste spills, digester liner tears, suspect
wastewater on digester liner, unusual odor, any activated alarms)
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IV. Contractor
1. Maintain gas gathering equipment
Maintain and operate Biogas Conditioning System equipment on the farm property, including gas
conditioning skid, biogas transfer pipelines, and blowers.
Maintain the Gas Upgrading System (GUS).
Ensure emergency alarms are working as designed
2. Emergency Response
• Post the emergency contact information on the Biogas Conditioning System skid and GUS equipment.
• Respond to emergencies in a timely manner.
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