310005_Digester Design Calcs_20240318

Facility Number: 31-0005
Grower: Scott Farm Designed By: JEO
Address: PO Box 759 Checked By: DSE
Rose Hill, NC 28458 Date: 01/12/24
County: Duplin, NC Sheet 1 of 12
ANAEROBIC DIGESTER DESIGN
FARM INFORMATION
Farm Population
Nursery:
Wean to Finish: ------------------- 14375 Hd.
Finishing: ------------------- 0
1 ai i vvv Lv vvuanling: -------------------
Farrow to feeder: -------------------
Farrow to finish: -------------------
Boars:-------------------
25 Yr. / 24 Hr Storm Event ------------------- 7.5 In.
Recycle Flush Water Volume: ------------------- 0
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:
-------------------
0.00
Structural Freeboard:
-------------------
1.0
Ft.
Side Slopes:
-------------------
3
:1 (H:V)
From Lagoon Volume Check Contours
460.0
Ft.
contour areas see sheet 2 of 7...
230.0
Ft.
Top of Dike Elevation:
----------------
Depth
153.00
Ft.
Finished Bottom Elevation:
---------------•
12.00 Ft.
141.00
Ft.
Start Pump Elevation:
----------------
20 In.
151.33
Ft.
Stop Pump Elevation:
----------------
26.00 In.
150.83
Ft.
Top of Sludge Elevation:
----------------
132 In.
142.00
Ft.
DIGESTER VOLUMES REQUIRED VOL.
DESIGN VOLUMES
% REQ'D.
Freeboard = 66125
(Cu.Ft.)
66,453 (Cu.Ft.)
100.50%
Temporary = 0
(Cu.Ft.)
49,168 (Cu.Ft.)
7.13%
Operational = 690,000
(Cu.Ft.)
689,043 (Cu.Ft.)
99.86%
Sludge = 0
(Cu.Ft.)
76,750 (Cu.Ft.)
Total Volume = 690,000
(Cu.Ft.)
881,414 (Cu.Ft.)
127.74%
Lagoon Surface Area: (Inside TOD)
105,800 S.F.
Smithfield Hog Production Engineering P.O. Box 856, Warsaw, NC 28398 [phone]

Facility Number: 31-0005
Grower: Scott Farm Designed By: JEO
Address: PO Box 759 Checked By: DSE
Rose Hill, NC 28458 Date: 01/12/24
County: Duplin, 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)
141.00
54,352
20,382
142.00
58,384
56,368
76,750
143.00
62,560
60,472
137,222
144.00
66,880
64,720
201,942
145.00
71,344
69,112
271,054
146.00
75,952
73,648
344,702
147.00
80,704
78,328
423,030
148.00
86,000
83,352
506,382
149.00
89,816
87,908
594,290
150.00
93,704
91,760
686,050
151.00
97,664
95,684
781,734
152.00
101,696
99,680
881,414
153.00
105,800
103,748
985,162
These volumes were calculated using the vertical average end area method
TOTAL REQD VOL
1,355,310
CF
CUMULATIVE
VOL.
ZONE VOL.
127.74%
END PUMP = = = =
150.83
FT
765,793 CF
TR'MT
689,043
0.00%
START PUMP = =:
151.33
FT
814,961 CF
TEMP
49,168
99.86%
MAX STORAGE =
152.00
FT
881,414 CF
STORM
66,453
7.13%
Smithfield Hog Production Engineering P.O. Box 856, Warsaw, NC 28398 [phone]

Grower: Scott Farm
Address: PO Box 759 Checked By: DSE
Rose Hill, NC 28458 Date: 01/12/24
County: Duplin, NC Sheet 3 of 12
WASTE STORAGE POND DESIGN 2nd STAGE
FARM INFORMATION
Nursery:
Wean to Finish:
Finishing:
i ai i vvv Lv vvuanling:
Farrow to feeder:
Farrow to finish:
Boars:
Storage Period:
100 Yr. / 24 Hr Storm Event
"Heavy Rain" Factor
Rainfall in Excess of Evaporation
Additional Water Usage:
Additional Drainage Area:
STORAGE INFORMATION
Farm Population:
Not Applicable Even if Value Shown
14375 Hd.
0
180 Days
7.5 In.
0
7 In.
0
0
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:
-------------------
0.00
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 sheet 2 of 7...
0.0
Top of Dike Elevation:
---------------- Depth
153.00
Ft.
Finished Bottom Elevation:
---------------• 10.30 Ft.
142.70
Ft.
Start Pump Elevation:
---------------- 19.92 In.
151.34
Ft.
Stop Pump Elevation:
---------------- 99.6 In.
144.70
Ft.
CHECK PUMPING ELEVATIONS!!!
STORAGE VOLUME REQUIRED VOL. DESIGN VOLUMES % REQ'D.
Storm Stor =
87832 (Cu.Ft.)
87,743
(Cu.Ft.)
99.90%
Temporary =
750887 (Cu.Ft.)
770,737
(Cu.Ft.)
102.64%
Permanent =
0 (Cu.Ft.)
351,645
(Cu.Ft.)
Total Volume =
838,719 (Cu.Ft.)
1,210,124
(Cu.Ft.)
144.28%
90 Temporary Storage Volume Elevation = 146.44 Ft. 78.72 In.
Lagoon Surface Area: (Inside TOD)------------------- 140,531 S.F.
Smithfield Hog Production Engineering P.O. Box 856, Warsaw, NC 28398 [phone]

Grower: Scott Farm #2 Lagoon (A) 3137 Designed By: JEO
Address: PO Box 759 Checked By: DSE
Rose Hill, NC 28458 Date: 01/12/24
County: Duplin, 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)
142.70
91,565
143.00
92,875
27,666
144.00
97,328
95,101
145.00
101,851
99,589
146.00
106,442
104,147
147.00
111,103
108,773
148.00
115,833
113,468
149.00
120,634
118,233
150.00
125,502
123,068
151.00
130,440
127,971
152.00
135,449
132,944
153.00
140,531
137,990
Cumul. Vol. (Cu.
159,165
186,831
281,932
381,521
485,668
594,440
707,909
826,142
949,210
1,077,180
1,210,124
1,348,114
These volumes were calculated using the vertical average end area method.
TOTAL READ VOL
1,355,310
CF
CUMULATIVE
VOL.
ZONE VOL. 144.28%
END PUMP = = = =
144.70
FT
351,645 CF
TR'MT
351,645
START PUMP = =:
151.34
FT
1,122,381 CF
TEMP
770,737 102.64%
MAX STORAGE =
152.00
FT
1,210,124 CF
STORM
87,743 99.90%
Smithfield Hog Production Engineering P.O. Box 856, Warsaw, NC 28398 [phone]

Grower: Scott Farm Designed By: JEO
Address: PO Box 759 Checked By: DSE
Rose Hill, NC 28458 Date: 01/12/24
County: Duplin, NC Sheet 5 of 12
MINIMUM REQUIRED VOLUME CALCULATIONS DIGESTER
Permanent Storage:
Required Treatment Volume:
Animal Type Capacity (cu.ft./hd) = Total
Wean to Finish
14,375
48.00
690,000
Finishing
0
50.00
0
Total Required Treatment Volume (cu. ft.)=
Sludge Storage Volume:
690,000
Animal Type Capacity ALW (cu.ft./lb) = Total
Wean to Finish
14,375
115
0.00
0
Finishing
0
135
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) * 100Yr./24Hr. Storm(in) / 12in./ft.
Vol.= (105800 sq.ft + 0 sq.ft.) * 7.5 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.= (105800 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)
0
66,125
Total Required Storm Storage
(100Yr. / 24Hr. Storm +'Heavy Rain')= 66,125 (CU.FT)
Total Required Permanent Storage
(Treatment + Sludge) = 690,000 (CU.FT)
TOTAL REQUIRED DIGESTER VOLUME = 756125 (CU.FT.)
w
0

Grower: Scott Farm Designed By: JEO
Address: PO Box 759 Checked By: DSE
Rose Hill, NC 28458 Date: 01/12/24
County: Duplin, NC Sheet 6 of 12
Temporary Storage Volume:
Manure Production:
Animal Type Capacity Sto. Period = Total
Wean to Finish
14,375
180
1.17
3,019,613
Finishing
0
180
1.40
0
Total Manure Production (gals.)= 3,019,613
Total Manure Production (cu.ft.)= 403,692
Excess Fresh Water:
Animal Type Capacity Sto. Period = Total
Wean to Finish
14,375
180
0.77
1,983,836
Finishing
0
180
0.90
0
Total Fresh Water Excess (gals.)= 1,983,836
Total Fresh Water Excess (cu.ft.)= 265,219

Grower: Scott Farm Designed By: JEO
Address: PO Box 759 Checked By: DSE
Rose Hill, NC 28458 Date: 01/12/24
County: Duplin, 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. + 140531 sq.ft. + 0 sq.ft.) * 7.0 in. /12 in./ft.
Total Required Volume for Rainfall in Excess of Evap. (cu.ft.)= 81,976
Storm Storage: Only in Waste Storage Pond since digester is covered
Vol.=(Digester Surface Area + Waste Storage Pond Area � * 100Yr./24Hr Storm (in.)/1 2in./ft.
Vol.= (0.0 sq.ft. + 140531 sq.ft. + 0 sq.ft.) * 7.5 in.
Total Required Volume for 100Yr./24Hr. Storm Event (cu.ft)= 87,832
"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. + 140531 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) _
87,832 (CU.FT)
750,887 (CU.FT)
0 (CU.FT)
0
TOTAL REQUIRED 2nd STAGE VOLUME = 838719 (CU.FT.)
0

Grower: Scott Farm Designed By: JEO
Address: PO Box 759 Checked By: DSE
Rose Hill, NC 28458 Date: 01/12/24
County: Duplin, NC Sheet 8 of 12
Top of Dike Elevation
Top of 25Yr. / 24Hr. 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 Deaths:
DIGESTER DESIGN SUMMARY
139.50 FT.
152.00 FT.
------------------- 137.75 FT.
------------------- 137.25 FT.
------------------- 142.00 FT.
------------------- 128.50 FT.
------------------- 124.00 FT.
------------------- 630.00 FT.
------------------- 260.00 FT.
------------------- 3.0:1 H : V
------------------- 163,800 SF
1.00 FT
TOTAL DESIGN VOLUME = 1781723 (CU.FT.)
Treatment / Sludge Storage Zone Depth ----------- 13.3 FT.
Temporary Storage Zone Depth ----------- 0.5 FT.
Freeboard Depth ----------- 1.8 FT.
Total Digester Depth ----------- 15.5 FT.
P.O. Box 856, Warsaw NC 28398

Grower: Scott Farm Designed By: JEO
Address: PO Box 759 Checked By: DSE
Rose Hill, NC 28458 Date: 10/18/22
County: Duplin, NC 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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Grower: Scott Farm Designed By: JEO
Address: PO Box 759 Checked By: DSE
Rose Hill, NC 28458 Date: 01/12/24
County: Duplin, 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 /12/2024
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]