310035_Digester Volume Calculations Update_20231220

Facility Number: 31-035
Grower: Waters Farm Designed By: BHW
Address: PO Box 856 Checked By: JEO
Warsaw, NC 28398 Date: 10/16/23
County: Sampson Sheet 1 of 6
ANAEROBIC DIGESTER DESIGN (Volume Check)
FARM INFORMATION
Farm Po:)ulation:
Wean to Finish: ------------------- 9792 Hd.
Finishing: ------------------- 0
weanling:
Farrow 0
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:
-------------------
UNK
Freeboard:
-------------------
1.0
Ft.
Side Slopes:
-------------------
3
:1 (H:V)
From Lagoon Volume Check Contours
330.0
Ft.
contour areas see sheet 2 of 7...
165.0
Ft.
Top of Dike Elevation:
----------------
Depth
145.20
Ft.
Finished Bottom Elevation:
BOTTOM E
12.40 Ft.
132.80
Ft.
Start Pump Elevation:
----------------
20.16 In.
143.52
Ft.
Stop Pump Elevation:
----------------
24 In.
143.20
Ft.
Top of Sludge Elevation:
----------------
136.8 In.
133.80
Ft.
DIGESTER VOLUMES REQUIRED VOL.
DESIGN VOLUMES
% REQ'D.
Storm Temp= 33712
(Cu.Ft.)
33,905 (Cu.Ft.)
100.57%
Temporary = 0
(Cu.Ft.)
15,685 (Cu.Ft.)
5.01 %
Operational = 313344
(Cu.Ft.)
335,709 (Cu.Ft.)
107.14%
Permanent Sludge = 0
(Cu.Ft.)
19,537 (Cu.Ft.)
Total Volume = 347,056
(Cu.Ft.)
404,837 (Cu.Ft.)
116.65%
Lagoon Surface Area: (Inside TOD)------------------- 53,939 S.F.
Smithfield Hog Production Engineering P.O. Box 856 ,Warsaw, NC 28398 (910) 293-343,

Facility Number: 1- 3
Grower: Waters Farm Designed By: BHW
Address: PO Box 856 Checked By: JEO
Warsaw, NC 28398 Date: 10/16/23
Countv: Sampson Sheet 2 of 6
ACTUAL DESIGN VOLUME CALCULATIONS
BASE VOLUME: �Cu. Ft.
DIGESTER STAGE -AREA VOLUMES
Contour
Elevation (FT. J Area (SF} Incr. Vol. (Cu. FT1
133.00
15,630
134.00
24,569
135.00
26,852
136.00
29,246
137.00
31,752
138.00
34,369
139.00
37,019
140.00
39,562
141.00
42,162
142.00
44,841
143.00
47,598
144.00
50,433
145.00
53,347
145.20
53,939
20,099
25,711
28,049
30,499
33,061
35,694
38,290
40,862
43,501
46,219
49,016
51,890
10,729
Cumul. Vol. (Cu. FT
3,458
23,557
49,268
77,317
107,816
140,877
176,570
214,861
255,723
299,224
345,443
394,459
446,349
457,078
These volumes were calculated using the vertical average end area method.
TOTAL REQD VOL
347,056
CF
CUMULATIVE
VOL.
ZONE VOL.
0.00%
END PUMP = = = =
143.20
FT
355,246 CIF
TR'MT
335,709
107.14%
START PUMP = =
143.52
FT
370,931 CIF
TEMP
15,685
5.01 %
MAX STORAGE =
144.20
FT
404,837 CIF
STORM
33,905
100.57%
Smithfield Hog Production Engineering P.O. Box 856, Warsaw, NC 28398 [phone]

Grower: Waters Farm Designed By: BHW
Address: PO Box 856 Checked By: JEO
Warsaw, NC 28398 Date: 10/16/23
County: Sampson Sheet 3 of 6
MINIMUM REQUIRED VOLUME CALCULATIONS DIGESTER
Permanent Storage:
Required Treatment Volume:
Animal Type Capacity " (cu.ft./hd) = Total
Nursery
0
Wean to Finish
9,792
32.00
313,344
Finishing
0
32.00
0
Farrow
Farrow feeder
Farrow to finish
Boars
Total Required Treatment Volume (cu. ft.)=
Sludge Storage Volume:
313,344
Animal Type Capacity ALW " (cu.ft./lb) = Total
Nursery
Wean to Finish
9,792
115
0.00
0
Finishing
0
135
0.00
0
weanling
433
feeder
finish
0
1
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.= (53939 sq.ft + 0 sq.ft.) * 7.5 in. /12 in./ft.
Total Required Volume for 100Yr.124Hr. 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.= (53939 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
33,712
Total Required Storm Storage
(100Yr. / 24Hr. Storm +'Heavy Rain')= 33,712 (CU.FT)
Total Required Permanent Storage
(Treatment + Sludge) = 313,344 (CU.FT)
TOTAL REQUIRED DIGESTER VOLUME = 347056 (CU.FT.)
Smithfield Hop Production Engineerinq
W
J

Grower: Waters Farm Designed By: BHW
Address: PO Box 856 Checked By: JEO
Warsaw, NC 28398 Date: 10/16/23
County: Sampson Sheet 4 of 6
DIGESTER DESIGN SUMMARY
Top of Dike Elevation ------------------- 145.20 FT.
Top of 25Yr. / 24Hr. Storm Storage -------------------
144.20
FT.
Start Pump Elevation -------------------
143.52
FT.
End Pump Elevation -------------------
143.20
FT.
Top of Sludge Storage -------------------
133.80
FT.
Seasonal High Watertable Elev.-------------------
LINK
Finished Bottom Elevation -------------------
132.80
FT.
Inside Top Length -------------------
Not
Applicable
Inside Top Width -------------------
Not
Applicable
Side Slopes -------------------
3.0:1
H:V
Lagoon Surface Area -------------------
53,939
SF
-------------------
Freeboard Depth -------------------
1.00
FT.
TOTAL DESIGN VOLUME = 404837 (CU.FT.)
Zone Deaths:
Treatment / Sludge Storage Zone Depth
Temporary Storage Zone Depth
Freeboard Depth
Total Digester Depth
zoo
10.4 FT.
0.3 FT.
1.7 FT.
12.4 FT.

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Grower: Waters Farm Designed By: BHW
Address: PO Box 856 Checked By: JEO
Warsaw, NC 28398 Date: 10/16/23
Co
Sheet 6 of 6
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.
ifiW"f 1340 V
DESIGNED:
DATE: 11 /27/2023
COMMENTS: The lagoon has been designed as an irregular shape.
accounted for and that storage volumes calculated represent actual
conditions regardless of the shape.
Effluent from the digester will be transferred to the existing lagoon treatment
and storage system.
l 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]