820303_Add-Info Response_20231201

December 1, 2023
Christine Lawson, Engineer
NCDEQ Division of Water Resources
Animal Feeding Operations
1636 Mail Service Center
Raleigh, NC 27699-1636
Subject: Response to Additional Information Request
Application No. ADS820303
WTW Farms
Sampson County
Dear Mrs. Lawson,
CAVANAU G H
Stewardship Through Innova,,.
Cavanaugh & Associates, P.A., on behalf of Warren Williams has reviewed your Additional Information
Request, dated November 2, 2023, for the subject permit modification application for'WTW Farms',
which is noted to have been received by the Division on June 29, 2023; and has developed responses
and additional supporting information to address each item in your letter. For your convenience, we
have repeated the comments below in bold font, followed by the responses in italicized font.
1. Setbacks — Sheet C.2.1.3 shows that the location of the proposed digester does not meet the
Siting Act requirements for:
a. distance from setback from the nearest residence not owned by the producer, which is
1,500 feet, G.S. §106-803(a)(1). As shown, the digester top of embankment is 1287 feet
from the nearest residence and 1,500 feet or slightly less from the next nearest
neighbor.
Response: The owner is working with the applicable residence owners to obtain necessary
easements and understands that these must be in place at the time of
construction to remain in compliance with G.S. 106-803(a)(1). We appreciate
the Division pointing this item out.
distance from property boundary, which is 500 feet, G.S. §106-803(a)(3). As shown, the
digester top of embankment is 115 feet from one property boundary and 334 feet
from another.
Response: The owner is working with the applicable property owners to obtain necessary
easements and understands that these must be in place at the time of
construction to remain in compliance with G.S. 106-803(a)(3). We appreciate
the Division pointing this item out.
c. distance from perennial stream is required to be 100 feet, per 15A NCAC 02T
.1304(b)(11). As shown, the digester top of embankment design is exactly 100 feet
from the perennial stream. Please take caution and field verify during construction to
maintain this setback.

Response: The proposed digester is planned to be 105' from the jurisdictional ditch top of
bank; an updated site plan sheet C.2.1.1 has been included with this response to
include the 105' dimension, as well as a note requiring the contractor to field
verify prior to construction that the 100'setback is met.
2. Freeboard — NC NRCS Standard 366 —Anaerobic Digester requires a minimum of 2 feet of
freeboard in the covered digester. Please verify that the digester will meet minimum
freeboard requirements.
Response: A note has been added to the hydraulic profile plan sheet C.2.1.2 as follows:
Per the NRCS 366 Anerobic Digester standard, rainfall is included in
determining the operational volume of the digester. The NOAA Atlas 14
30yr normal rainfall data for the area has been used to determine the
25-year, 24-hour rainfall on the digester. With this data, the operational
volume for the digester design at this site is based on 12-inches of
structural freeboard plus 7.5 inches for the 25-year, 24-hour rainfall
event to determine the 20.28 inches of freeboard for the digester.
Additionally, updated volume calculations, plan sheets, an updated p. 2 of the
permit application, and an updated narrative have been attached with this
response to account for a 7.5 inch storm rather than a 7.0 inch storm.
3. Biogas Use as a Renewable Energy Resource — Session Law 2023-63 (2023 Farm Act) requires
that the gases collected by a farm digester system begin to be used as a renewable energy
resource as quickly as feasible, but no later than within six months of the collection of gases.
Until the gases are being used as a renewable energy resource the gas shall be flared rather
than vented.
a. Your application stated that the gas would be exported for use as a renewable energy
resource within 12 months of construction. Please confirm that timeline also complies
with Session Law 2023-63.
Response: The applicant plans to begin export of the renewable energy resource within 6
months of collecting gases in accordance with Session Law 2023-63 (2023 Farm
Act).
b. Your application indicated that no emergency flare will be provided. Please verify a
flare would be available and used if necessary for compliance with Session Law 2023-
63.
Response: The applicant has made arrangements for the use of a portable flare should the
need arise, which will be available and used if necessary for compliance with
Session Law 2023-63.
4. Waste Level Gauge — Please indicate location/method for measuring waste levels in the
digester, as it does not gravity feed to the secondary containment.

Response: We are unclear of the use of "secondary containment" in this comment; the
liquid level in the digester will be observed and measured via the level control
wet well.
5. Nutrient Management Plan (NMP) —The NMP submitted is dated 4-26-2016 and the irrigation
map was not included. Sheet C.2.1.1 indicates the "Center Pivot End Gun Shall be Adjusted as
Necessary (Refer to Updated Waste Utilization Plan, By Others)".
a. Please provide and updated NMP.
b. Please provide irrigation map — updated as needed.
Response: The updated NMP and irrigation map will be coming separately from Smithfield.
6. Air Quality Permitting —Please provide general information regarding any Air Quality permits,
and/or applicability determinations regarding this project. Please provide information about if
applications have been filed, permits (if issued), and/or results of an applicability
determination.
Response: The farmer currently anticipates participating in a project where all biogas is
piped to a centralized facility that has an existing air quality permit.
Thank you for your assistance and review of the permit application package. Please do not hesitate to
contact our office should you have any questions, comments, or require any additional information.
Regards,
Cavanaugh & Associates, P.A.
N7 Q,CLnt�
Jeff P. Cappadona, P.E.
Attachments
cc: Warren Williams

WTW Farms Volume Calculations
Project: WTW Farms
Project No: BE.19.006
Date: 2023-12-1
Existing Configuration (For Reference)
Farm Information:
Location: Sampson County, NC Design By: JPC
Checked By: JPC
Farm Population:
Lagoon 2:
2,448
Finishing
Lagoon 1:
2,448
Finishing
Total:
4,896
Finishing
Storm and Rainfall:
Storm (25-yr, 24-hr):
7.0
in.
Rainfall In Excess Of Evaporation:
7.0
in.
"Heavy Rain"
0.0
in.
VolBEL '

CAVANAU G H
1 of 6

Proposed Configuration (Proposed Digester)
Flow Path:
Barns -> Digester (Proposed) -> Lagoon 2 -> Lagoon 1
Volumes:
Capacity = � Finishing
Measured Sludge Depth: 0 ft
Planned Sludge Depth: 0 ft
Sludge to be Removed: 0 cf
0 gal
Note: 'Measured Sludge Depth' (see above) is 0 cf for
Proposed Digesters
Capacit * ALW * cf/lb 1= Total
Treatment Volume = 1 4,896 135 11.00 W 1660,960 if
ICapacity IDaysofStorage al/ head*da = Total
Daily Infow = 1 4,896 90 11.37 1603,677 E� gallons
80,705 cf
* Note: The existin volumes shown below are provided based on the existing lagoon design for this farm,
Lagoon 2 designed by Lanier & Houston 1994-9-22 and checked by Herman Riggs 1994-9-30
Lagoon 1 designed and approved by Herman Ri s 1991-6-10
Volume Required*
(cf)
Digester
(Proposed)
Existing
Lagoon 2
Existing
Lagoon 1
Total
Required
Desired Digester Treatment Volume
156,449
N/A
N/A
156,449
Additional Treatment
2,451
418,943
83,116
504,511
Sludge Storage
0
0
0
0
Excess Wash Water
0
0
0
0
Rainfall In Excess Of Evaporation
0
39,375
37,917
77,292
Storm Stora e
0
39,375
37,917
77,292
"Heavy Rain"
0
0
0
0
Daily Inflow (90 days)
6,249
0
74,456
80,705
Total
165,150
497,693
233,406
896,249
L°
CAVANAU G H
Stewardship Through Innovation
Note: Both 'Rainfall In Excess Of Evaporation' and 'Storm Storage' are shown as 0 cf for the digester because the
HDPE cover prevents rain from entering the wastewater system and therefore doesn't need to be included in these
volume calculations; the rain that falls on the cover is simply pumped off of the cover with a rainwater pump(s).
That being said, per the NRCS 366 Anerobic Digester standard, rainfall is included in determining the operational
volume of the digester. The NOAA Atlas 14 30yr normal rainfall data for the area has been used to determine the 25-
year, 24-hour rainfall on the digester. With this data, the following value has been used for the the 25-year, 24-hour
rainfall event:
Storm (25-yr, 24-hr): 7.5 in.
Volume Provided*
(cf)
Digester
(Proposed)
Existing
Lagoon 2
Existing
Lagoon 1
Total
Provided
Desired Digester Treatment Volume
156,449
N/A
N/A
156,449
Additional Treatment
2,451
418,943
83,116
504,511
Sludge Storage
0
0
0
0
Excess Wash Water
0
0
0
0
Rainfall In Excess Of Evaporation
0
39,375
37,917
77,292
Storm Storage
0
43,642
37,917
81,559
"Heavy Rain"
0
0
0
0
Daily Inflow (90 days)
6,249
0
333,121
339,370
Total
165,150
501,960
492,071
1,159,181
Totals (cf)
Volume
Required* (cf)
Volume
Provided* (cf)
Efficiency
Treatment
660,960
660,960
100%
Sludge Storage
0
0
N/A
Excess Wash Water
0
0
N/A
Rainfall In Excess Of Evaporation
77,292
77,292
100%
Storm Storage
1 77,292
81,559
1 105%
"Heavy Rain"
0
0
N/A
Daily Inflow (90 days)
80,705
339,370
420%
Total
896,249
1 1,159,181
129%
Days of Storage:
Proposed Configuration
Required I Provided
Dail Inflow Volume cu.ft. 80,7051 339,370
Days of Storage 901 378
2of6

Total Temporary Storage
Proposed Configuration (Proposed Digester)
Temporary Storage Volume Required" (cf)
Digester
(Proposed)
txisting
Lagoon 2
Existing
Lagoon 1
Total
Required
Excess Wash Water
0
0
0
0
Rainfall In Excess Of Evaporation
0
39,375
37,917
77,292
"Heavy Rain"
0
0
0
0
Daily Inflow (90 days)
6,249
0
74,456
80,705
Total
6,249
39,375
112,373
157,997
Temporary Storage Volume Provided" (cf)
Digester
(Proposed)
xis mg
Lagoon 2
Existing
Lagoon 1
Total
Provided
Excess Wash Water
0
0
0
0
Rainfall In Excess Of Evaporation
0
39,375
37,917
77,292
"Heavy Rain"
0
0
0
0
Daily Inflow (90 days)
6,249
0
333,121
339,370
Total
1 6,2491
39,3751
371,0381
416,662
Summary
Total Temporary Storage (cf)
Proposed Configuration
Kequired
Provideg—
Excess Wash Water
0
0
Rainfall In Excess Of Evaporation
77,292
77,292
"Heavy Rain"
0
0
Daily Inflow (90 days)
1 80,705
339,370
Total
1 157,997
416,662
CAVANAU G H
3of6

L°
Digester (Proposed) Volume
Digester (Proposed) Stage -Storage
Elevation ft
Area sf
Incr. Vol cf
Cumul. Vol cf
139.00
8,064
-
0
140.00
9,396
8,730
8,730
141.00
10,800
10,098
18,828
142.00
12,276
11,538
30,366
143.00
13,824
13,050
43,416
144.00
15,444
14,634
58,050
145.00
17,136
16,290
74,340
146.00
18,900
18,018
92,358
147.00
20,736
19,818
112,176
148.00
22,644
21,690
133,866
149.00
24,624
23,634
157,500
150.00
26,676
25,650
183,150
151.00
28,800
27,738
210,888
Digester Desired Volume: 156,449 cu ft. (5,794 cy)
Digester Treatment Volume
(@ Treatment Elevation of 149.06): 158,901 cu ft. (5,885 cy)
% Desired:
Digester (Proposed) Updated Elevations:
102%
Zone
Volume
Cumulative Vol.
Elevation
Depth (in.)
Planned Sludge
0
0
139.00
144.00
Treatment
158,901
158,901
149.06
23.28
Temporary
6,249
165,150
149.31
20.28
Storm
0
165,150
149.31
20.28
= 151.00' (210,888 of)
Top of Storm Elev = 149.31' (20.28") (165,150 cf)
Top of Temp Storage Elev = 149.31' (20.28") (165,150 cf) (Start Pump)
Top of Treat Elev = 149.06' (23.28") (158,901 cf) (Stop Pump)
Planned Sludae Elev = 139.00'
CAVANAU G H
)ipThrough Innovation
4of6

L°
Existing Lagoon 2 Volume
Existing Lagoon 2 Stage -Storage
Elevation ft
Area sf
Incr. Vol cf
Cumul. Vol cf
140.00
37,206
-
0
141.00
39,600
38,403
38,403
142.00
42,066
40,833
79,236
143.00
44,604
43,335
122,571
144.00
47,214
45,909
168,480
145.00
49,896
48,555
217,035
146.00
52,650
51,273
268,308
147.00
55,476
54,063
322,371
148.00
58,374
56,925
379,296
149.00
61,344
59,859
439,155
150.00
64,386
62,865
502,020
151.00
67,500
65,943
567,563
Existing Lagoon 2 Updated Elevations:
Note: The dimensions
and volumes shown are
provided based on the
lagoon design for the
existing lagoon on this
farm, designed by Lanier
& Houston 1994-9-22
and checked by Herman
Riggs 1994-9-30
Zone
Volume
Cumulative Vol.
Elevation
Depth (in.)
Sludge
0
0
140.00
132.00
Treatment
418,943
418,943
148.67
27.96
Temporary
39,375
458,318
149.31
20.28
Storm
43,642
501,960
150.00
12.00
= 151.00' (567,963 cf)
Top of Storm Elev = 150.00' (12.00") (501,960 cf)
Top of Temp Storage Elev = 149.31' (20.28") (458,318 cf) (Start Pump)
Top of Treat Elev = 148.67' (27.96") (418,943 cf) (Stop Pump)
Finished Bottom Elev = 140.00'
Note: 'Top of Temp Storage' (start pump) of this lagoon has been limited to the same elevation as the
upstream digester'Top of Temp Storage' (start pump) in order to keep the digester water level in permit
compliance by preventing backflow from this lagoon.
CAVANAU G H
)ipThrough Innovation
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L°
Existing Lagoon 1 Volume
Existing Lagoon 1 Stage -Storage
Elevation ft
Area sf
Incr. Vol cf
Cumul. Vol cf
141.00
32,384
-
0
142.00
34,706
33,545
33,545
143.00
37,100
35,903
69,448
144.00
39,566
38,333
107,781
145.00
42,104
40,835
148,616
146.00
44,714
43,409
192,025
147.00
47,396
46,055
238,080
148.00
50,150
48,773
286,853
149.00
52,976
51,563
338,416
150.00
55,874
54,425
392,841
151.00
58,844
57,359
450,200
152.00
61,886
60,365
510,565
153.00
65,000
63,443
574,008
Existing Lagoon 1 Updated Elevations:
Note: The dimensions
and volumes shown are
provided based on the
lagoon design for the
existing lagoon on this
farm, designed and
approved by Herman
Riggs 1991-6-10
Zone
Volume
Cumulative Vol.
Elevation
Depth (in.)
Sludge
0
0
141.00
144.00
Treatment
83,116
83,116
143.36
115.68
Temporary
371,038
454,154
151.07
23.16
Storm
37,917
492,071
151.70
15.60
= 153.00' (574,008 cf)
Top of Storm Elev = 151.70' (15.60") (492,071 cf)
Top of Temp Storage Elev = 151.07' (23.16") (454,154 cf) (Start F
Top of Treat Elev = 143.36' (115.68") (83,116 cf) (Stop Pump)
Finished Bottom Elev = 141.00'
CAVANAU G H
)ipThrough Innovation
6of6

2.3 Acreage cleared and available for application (excluding all required buffers and areas not covered by the application
system): See attached Waste Utilization Plan Acres
Required Acreage (as listed in the CAWMP): See attached Waste Utilization Plan Acres
Existing Application Area (pre -construction): See attached Waste Utilization Plan Acres
Proposed Application Area (post -construction): See new Waste Utilization Plan Acres
Is there a change to the existing WUP? YES or NO (circle one)
Is the Existing WUP attached? YES or NO (circle one)
Is the New (if applicable) WUP attached? YES or NO (circle one)
*Note: The New WUP is pending by the owner.
2.4 List and Describe all Storage/Treatment Structures Below:
a. DIGESTER or other PRIMARY TREATMENT: (double click on "Select" for drop -down menu box)
Treatment
Existing?
Name of
Treatment
Type of
Liner
Surface
Type of Cover
Ttl Capacity
Req'd
Capacity
Unit Type
YP
(Y/N)
Unit
Material
Area
Material
(cu. Ft.)
(cu.ft.)
Digester
N
Digester
Synthetic
28,800
Synthetic (80 mil)
165,150
165,150
Select
Select
Select
Select
Select
Select
a.l Are engineering designs, drawings, specifications, and details attached? YES or NO (circle one)
b. SECONDARY TREATMENT/STORAGE: (double click on "Select" for drop -down menu box)
Name of Storage
Unit
Existing?
(Y/N)
Type of Liner
Material
Surface Area
Ttl Capacity
(cu. Ft.)
Req'd Capacity
(cu.ft.)
Lagoon 2
Y
Soil in situ
67,500
501,960
497,693
Lagoon 1
Y
Soil in situ
65,000
492,071
233,406
Select
Select
*Note: The "Total Capacity" and "Req'd Capacity" is given per the existing lagoon calculations for this farm
Lagoon 2 designed by Lanier & Houston 1994-9-22 and checked by Herman Riggs 1994-9-30
Lagoon 1 designed and approved by Herman Riggs 1991-6-10
2.5 Are KNOWN subsurface drains present within 100' of any application fields? YES or NO (circle one)
2.6 Are KNOWN subsurface drains in the vicinity or under the waste management system? YES or NO (circle one)
2.7 Does this facility meet all applicable siting requirements? YES or NO (circle one)
Note: This item has not been marked "Yes" or "No" since this farm requires setback waivers due to the location of
the proposed digester (refer to `Setbacks' plan sheet C.2.1.3 attached with this application), and setback waivers are
being pursued by the farm owner.
2.8 Describe Water Movement between Barns, Digesters, and Storage Ponds (double click on "Select" for drop -down menu
box)
Pump Station or
Minimum Pump
Plan Sheet
Location
Gravity
Pipe Size
Capacity
Reference
GPM
TDH
Barns to Digester
Pump Station (ILS)
8"
610
14
C.2.1.1
1
FORM: AWO-STATE-G-DIGESTER-7/07/2022 Page 2 of 6

Narrative
'WTW Farms' will utilize existing barns with slotted floors over flushing pits to collect manure.
Upon flushing, Barns 1-4 will gravity flow waste through a 12" pipe to an influent lift Station (ILS). The
influent lift Station will utilize two 10 hp GEA pumps, with a typical flow of approx. 610 gpm (1 pump)
through an 8" HDPE (DR 17) forcemain into the anaerobic digester.
After treatment in the anaerobic digester (210,888 cubic feet of total volume, 165,150 cubic feet at
Operating Level), effluent will gravity flow through the 12" digester outlet pipe to the level control wet
well (LC), which connects to a 12" pipe to the existing Lagoon 2. The transfer pump will pump from the
existing Lagoon 2 to the existing Lagoon 1 using a 10 hp GEA pump, with a typical flow of approx. 520
gpm through a 6" HDPE (DR 17) forcemain in order to balance the lagoons as needed.

i-_
Table 1: Identification List
Section
IDescription
IQuantity
ILInit
jAdditional Info
Gravity Waste Collection (GWC)
GWC-I-PIPE
12" HDPE (DR 17) Gravity Collection Line
518
L.F.
GWC-2-CO
ICIeanout
2
each
Influent Lift Station & Forcemain (ILS)
ILS-I-PS
Influent Lift Station
-
-
Table 2/C.2.1.1 and Detail 1/C.3.2A
ILS-2-INV
12" Digester Bypass Inlet
-
-
Inv. 152.00'
ILS-3-PIPE
12" HDPE (DR 17) Digester Bypass Pipe
35
L.F.
ILS-4-INV
12" Digester Bypass Outlet
-
-
Inv. 152.00'
ILS-5-FM
8" HDPE (DR 17) Forcemain
507
L.F.
--------------------
ILS-6-INV
8" HDPE (DR 17) Forcemain Inv. Out
-
-
Inv. 147.00'
Digester(D)
D-1-DIGESTER
Proposed Digester
-
-
Table 4/C.2.1.1 and Sheet C.3.4
D-2-MS
Mixing Station
-
-
Table 3/C.2.1.1 and Sheet C.3.3
D-3-PIPE
8" HDPE (DR 17)
52
L.F.
D-4-SUMP
HDPE Sump Box Mixing System Inlet
Not used
D-5-FM
6" HDPE (DR 17) Forcemain
30
L.F.
Inv. Out 147.00'
D-6-PRA
Pump Repair Area
-
-
D-7-13AF
HDPE Baffle (Underflow)
-
-
Sheet C.3.4
D-8-13AF
--------
D-12-SLG
HDPE Baffle (Overflow)
---------------------
Sludge Removal Pipes (HDPE DR 17)
Not used
----------------------------
1 120 L.F. 13 pipes at 40 L.F. each
Level Control (LC)
LC-1-INV
Digester Inv. Out
-
-
Inv. 149.06'
LC-2-PIPE
12" HDPE (DR 17) Digester Outlet Pipe
401
L.F.
LC-3-PS
Level Control Station
Not used
LC-4-FM
6" HDPE (DR 17) Forcemain
Not used
LC-5-INV
Lagoon Invert From Digester
-
-
Inv. 148.41'
LC-6-WW
I Level Control Wet Well
-
-
Table 5/C.2.1.1 and Detail 2/C.3.213
LC-7-PIPE
12" PVC (DR 35) Digester Outlet Pipe
31
L.F.
Transfer Pump (TP)
TP-I-PUMP
Transfer Pump
-
-
Table 6/C.2.1.1 and Sheet C.3.7
TP-2-FM
6" HDPE (DR 17) Forcemain
128
L.F.
TP-3-INV
6" HDPE (DR 17) Forcemain Inv. Out
-
-
Inv. 152.00'
Table 6: Transfer Pump (Detail 6/C.3.71
Design Flow:
-
gpm
Selected Pump Rate:
520
gpm
Total Dynamic Head (TDH):
14
ft
Pump Horsepower:
10 hp
Pump Speed (RPM):
1,760 RPM
Electrical Supply:
240 V
Electrical Frequency:
60 hz
Phase:
10
Impeller Diameter:
9.5 in.
Motor Type:
TEFC
Selected Pump:
GEA
Pump Model:
3" Pontoon HP
Table 5: Level Control Wet Well
Finished Grade:
151.00
ft
Rim:
151.50
ft
Invert In:
144.00
ft
InvertOut:
148.56
ft
Bottom of Wet Well:
1 143.501
ft
Depth of Wet Well:
1 8. 001
ft
A
CENTER PIVOT
/ IRRIGATION AREA
CENTER PIVOT END GUN SHALL BE
ADJUSTED AS NECESSARY (REFER
TO UPDATED WASTE UTILIZATION
PLAN, BY OTHERS)
END OF ON -FARM
PROJECT AND
BEGINNING OF ALIGN
PROJECT, BIOGAS
PIPING/BY ALIGN RNG
355' OF 4" HDPE D0� $-
/ (DR 17) BIOGAS PIPE
/ cc, 00
oo
�00 1 _
� O
010 00
1 \
°o
/o
CO
o
IS
o 6 1
PROPOSED
SWALE
(TYP.)
a
o \ PROPOSED RAINWATER PUMP
o \\ AND RAINWATER OUTLET
\ SEE DETAILS 4/C.3.6 AND
\ SHEET C.3.8
Table 2: Influent Lift Station (Detail 1/C.3.2A)
Finished Grade:
152.00
ft
Rim:
154.50
ft
Invert In (From South):
145.00
ft
Invert In (From North):
148.00
ft
Bypass Riser:
153.50
ft
Bypass Invert Out of Wall:
152.00
ft
Bottom of Wet Well:
144.50
ft
Depth of Wet Well:
10.00
ft
Design Flow:
300
gpm
Selected Pump Rate:
610 (1 pump)
gpm
Total Dynamic Head (TDH):
Pump Horsepower:
Ift
10 hp
Pump Speed (RPM):
1,760 RPM
Electrical Supply:
240 V
Electrical Frequency:
60 hz
Phase:
10
Impeller Diameter:
8 in.
Motor Type:
TEFC
Selected Pump:
GEA
Pump Model:
4" Hog
Shaft Length:
110 ft.
II
I
\\ I I\ I l /I I �\
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---
II
ILN 1
\__ I\ / \ lll\I
\ \ \ - - - - \ \ \ \ \\ \ I I \ \
A\
Table 3: Mixing Station (Detail 1/C.3.3)
Finished Grade:
151.00
ft
Rim:
151.50
ft
Invert In:
142.00
ft
Bottom of Wet Well:
141.50
ft
Depth of Wet Well:
10.00
ft
Selected Pump Rate:
1,000 (1 pump)
gpm
Pump Horsepower:
7.5 hp
Electrical Supply:
240 V
Electrical Frequency: 60 hz
Phase: 110
Farm Information
Farm Name:
WTW Farms
Permit Number:
AWS820303
Permitted Capacity:
4,896
B-1
BIOGAS SKI
_IIIIIII
Table 4: Digester Data Table Ir IIIIII, 11
i
I I
(\ III III
---_ _---- JAI
\ 25% compaction factor used for fil I
/ I
Length:
240
ft
Width
120
ft
Top of Dike Elev:
151.00
ft
Operating Level Elev:
149.31
ft
Bottom Elev:
139.00
ft
Total Volume:
210,888
cf
Volume at Operating Level:
165,150
cf
S.A. @ Inside Top of Dike:
28,800
ft'
Slope:
3:1 -
Total Cut
Total Fill
Net Surplus
5,749
CY
1,856
CY
3,893
CY
EXISTING / / \
GRAVEL/DIRT / \
ACCESS ROAD // \
/
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111 ALL 4 BARNS
USE FLUSH TANKS
'SA.\
1 1�I
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1 g_5 I I 11 o NI 1 1 COLLECTION LINE UNDER
\ END CAP I I I I o f, 11 07 EXISTING SWALE I
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PIPE _ADJUST GRADING AS NEEDED TO I I 1 I I I / PS
ALLOW SPACE FOR DIGESTER COVER W0 - - -
ANCHOR TRENCH AND FLAT AREA _ _ - - I I / -- - _ - - - - 1 I \ \\
FOR EQUIPMENT WET WELLS TYP. �I I� W�
/ ( ) SCALE: 1 " = 50' \ \\
\ \ \\\\
50 0 50 \ \ \\\\
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D-2 \\ \ \ \ \�/ GM WTI/�I� IIII 1 I r ILs-2 �o III I 1 I I IIIIII \\ \\
`\ MS - -� _ 49� �� \ co G �jl _ 1 I I III 1 1 I INV III IIII � IIIIII \ SCALE OF MAP MAY VARY \ \I\\
- _ - - - 1_150. _ _ _ I I 1 I I 1 1 I I DUE TO METHODS OF REPRODUCTION. \ 11
D] \ * - - _- ,-_151 �1Nj__--- _ - , 11 I I I 11 I I ILS-3 GWC-1 III IIII I IIIII \\ \
- - 111 III ,NCI I I PIPE PIPE III IIII I IIIIII 1 \ \I I
rv�L- ---- 150-- ILS-5 �_�I�I 1 11 I I 1 ILS-4 !N I NI I IIIII 1
D_6 \ I
I -- FM 1 'I IIII 1�. 11 11 I INV
"�' I �'I I 1 IIIIII 1 \
I III PRA / ,- � � I 11 I I� I I I � 111 III TP-3 111 I I I \ IIIIII 1
_ III I TP-1 I 11 �'�� 1 1 1 1 I 111 L I INv II \IIII 1 IIIIII \
I D-1 DPUMP I I��" I �1 I II II I II \IIII \IIIIII
III IGESTER I Ili / � I I I I III 1 II \IIII \IIIII
I NEW ANAEROBIC DIGESTER � I I IIIII II IINSv-6 TP-2
TOP OF DIKE 151.00FM EXISTING LAGOON 1 1 11 IIII 1 1 IIIIIIIII _ _ ,
\
\ \I III 1 IIIII
I I
D-5 I
1 FM I I
_ IIIL PIPE I I I I I
I -I -I G PROPOSEL
1 IIIII I I I I I TOP of DIKE 153.00 1 1 I I IIII
I IIIIII II III IIIIII IIII FREEBOARD 152.00 \ III \ 11\IIIIIII
II IIIIIII I j I IIIII IIIIIII _, 1 I \ IIIIIII _- ____
I I a I I
II
SWALES
I I I I I1 __-_-_-_-- .Z=-153--
I II I I I I I I I I I IIII __-- _ -_-
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III ______
111�L1�
DLG2
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1 (TYP.)
-_-_
I IIIIII 1111111111 I IIII11L�=
-
\ I IIIIII
I
EXISTING LAGOON 2
I I I III I IIII II`I\�-__-_-=_152-_-=_-- 151--_-_____
I
TOP OF DIKE 151.00'
I I ------\ -- --49-=:48==_147
\ 11'II
I
FREEBOARD 150.00
_
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tt I \III
I
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LC-5
INV
__-_ __-__�_� I I I �I /���__-_ = 47_=149-
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PIPE
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LC-7
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C.2.1 .1
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CONNECT TO BIOGAS
PIPELINE ALIGNMENT WITH \\\\ \\ - _ / I ( I Vd
/ - FITTINGS AS NECESSARY 146"FP..•••""'•••..:1
14 \ /

160
4" INFLUENT LIFT STATION
155 RIM: 154.50
FFE: 154.00 FFE: 154.00
FG: 152.00'
150 INV: 150.50' WET WELL
.O
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SCpiOF
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SOUTH
145 INV: 145.00'
BOTTOM: 144.50'
TOD: TOP OF DIKE
TOB: TOP OF BANK
FFE: FINISH FLOOR ELEVATION
FB: FREEBOARD ELEVATION
EG: EXISTING GRADE
OL: OPERATING LEVEL
140
NOTE:
INVERTS OF EXISTING GRAVITY PIPING ARE
APPROXIMATED BASED ON BEST
AVAILABLE SURVEY INFORMATION
135
130
125
FFE: 154.00' FFE: 154.00'
II
I �
INV: 150.50'
Poi 1
INV: 148.00'
EMERGENCY BYPASS TO
EXISTING LAGOON 1
NORTH RISER INV. 153.50'
WALL INV. 152.00' (ILS-2)
DRY WELL
8" MIXING STATION
(SEE DETAIL 1 /C.3.3)
141.50'
INV: 114.00'=
(ILS-6)
NOTE: PER THE NRCS 366 ANEROBIC DIGESTER STANDARD,
RAINFALL IS INCLUDED IN DETERMINING THE
OPERATIONAL VOLUME OF THE DIGESTER. THE NOAA
ATLAS 14 30YR NORMAL RAINFALL DATA FOR THE
AREA HAS BEEN USED TO DETERMINE THE 25-YEAR,
24-HOUR RAINFALL ON THE DIGESTER. WITH THIS DATA,
THE OPERATIONAL VOLUME FOR THE DIGESTER DESIGN
AT THIS SITE IS BASED ON 12-INCHES OF STRUCTURAL
FREEBOARD PLUS 7.5 INCHES FOR THE 25-YEAR,
24-HOUR RAINFALL EVENT TO DETERMINE THE 20.28
INCHES OF FREEBOARD FOR THE DIGESTER.
TOD: 151.00'
HDPE COVER (TYP) PROPOSED
SWALE
OUTLET
OL: 149.31 ' INV: 149.06'
(LC-1)
INV: 146.00'
PROPSED DIGESTER I
INV: 144.00'
8" PUMP RETURN
INV: 141.00'
BOTTOM: 139.00'
NOTE: TOP OF TEMPORARY STORAGE (START PUMP)
OF LAGOON 2 HAS BEEN LIMITED TO SAME
ELEVATION AS UPSTREAM DIGESTER OPERATING
LEVEL (OL) IN ORDER TO KEEP DIGESTER WATER
LEVEL IN PERMIT COMPLIANCE BY PREVENTING
BACKFLOW FROM LAGOON.
PROPOSED LEVEL CONTROL
WET WELL (LC-6)
RIM:151.50'
1 TOD: 151.00'
FR• 1 rn nn'
OUTLETt0.5%MIN.
ONTROL PIPE
LC-7) INV: 148.41'
INV: 148.56' (LC-5)
SLOPE
TRANSFER PUMP
(SEE SHEET C.3.7)
WET WELL
BOTTOM: 143.50'
EXISTING LAGOON 2
BOTTOM: 140.00'
EMERGENCY BYPASS FROM
INFLUENT LIFT STATION-
INV. 152.00' (ILS-4)
I NV: 152.00'
_- _ FB: 152.00'
TOP OF STORM:
-150.00' -
TOP OF TEMP.
STORAGE: 149.31'
EXISTING LAGOON 1
BOTTOM: 141.00'
TOD: 153.00'
160
155
150
MR
140
135
130
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SHEET NUMBER
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