660030_Application Attachment_Volume Calcs

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

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

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

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

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

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

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

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

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

Grower: Gaston Farm 8029 Designed By: JEO
Address: PO Box 759 Checked By: DSE
Rose Hill, NC 28458 Date: 01/03/23
County: Bladen Sheet 10 of 12
ZONE ELEVATIONS DIGESTER
TOP OF DIKE ELEV = 139.50
/ 1 TOP OF STORM ELEV = 138.50 / 1
/ 1 TOP OF TEMP STORAGE ELEV = 137.75 / 1
1 /
1 /
START PUMP EL.= 137.7 \ TOP OF OPERATIONAL ELEV = 137.25 /
1 I
END PUMP EL. = 137.25 \ SHWT = 128.50
1 /
1 /
1 PERMANENT SLUDGE ELEV = 126.! /
\ /
FINISHED BOTTOM ELEV = 124.00
Smithfield Hog Production Engineering P O. Box 856, Warsaw NC 28398 [phone]

Grower: Gaston Farm 8029 Primary Designed By: JEO
Address: PO Box 759 Checked By: DSE
Rose Hill, NC 28458 Date: 01/03/23
County: Bladen Sheet 11 of 12
ZONE ELEVATIONS STORAGE POND
TOP OF DIKE ELEV = 137.59
/ 1 TOP OF STORM ELEV = 136.59 / 1
1 /
1 /
START PUMP EL.= 135.9, 1 TOP OF TEMP STORAGE ELEV = 135.98 /
1 /
END PUMP EL. = 130.74 1 TOP OF PERMANENT ELEV = 130 SHWT = 128.50
1 /
1 /
1 /
FINISHED BOTTOM ELEV = 125.38
Smithfield Hog Production Engineering P.O. Box 856, Warsaw NC 28398 [phone]

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