310522_Report_20191018

ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
LINDA CULPEPPER
Director
Warren Gregory Thornton
Three Boys Run Farms
709 SW Blvd
Clinton, NC 28328
Dear Warren G Thornton:
NORTH CAROLINA
Environmental Quality
October 18, 2019
FECEIVILED/NCBIENROM
OCT 2 3 20119
Water Quality F,e ional
Operations Section
Wilrninaton Recional Office
Subject: Sludge Survey Testing Dates
Certificate of Coverage No. AWS310522
Three Boys Run Farms
Animal Waste Management System
Duplin County,
The Division of Water Resources (Division) received your sludge survey information on
September 20, 2019. With the survey results, you requested an extension of the sludge survey
requirement for lagoon structure "2" at the Three Boys Run Farms facility. Due to the amount of
treatment volume available, and the rate of sludge accumulation for the lagoon, the Division
agrees that a sludge survey is not needed until December 31, 2024.
The next sludge survey for lagoon structure "2" at Three Boys Run Farms should be performed
before December 31, 2024. Please retain this letter and keep it with your farm records for
reference.
Please call me at [phone] if you have any questions.
Sincerely,
Ad44�'4�
Heath C. Robinson
Animal Feeding Operations Program
cc: ilrrin ton RegiQna�', Water Quality Regional Operations Section
Permit File AW 3 OSZZ
North Carolina Department of Environmental Quality I Division of Water Resources
� D-E Q, 512 North Salisbury Street l 1636 Mail Service Center I Raleigh, North Carolina 27699-1636
919.707.9000

Sludge Survey Evaluation Form
Today's Date
10/1.8/20,1.9.' _
Facility #
•31'0522
Owner:
Warren Gregory Thornton
Lagoon .ID 0.
Sludge Survey. Received:
9/20/2019'
Sludge Survey Performed:
3/28/2.018 .
Sludge Depth (Row 0): (ft)
2.1
Existing Treatment Depth (Row P): (ft)
4.40 .
Start Date:
: 1/l/1987
Facility age at time of survey:(yr)
31
Average Sludge Accumulation (ft/yr):.
0.09
Requested Extension: (yr)
5
Re uested Due Date .
2024
Sludge Accuxriulation during extension period: (ft)
0.43
Treatment Depth Available after. Extension:. (ft)
.3.97
Sludge level.OK?
Ratio Estimates Based on Depth
EXISTING.
EXEMPTION
0.38
0.44
Ratio of Sludge layer to total trmt depth
Ratio of.Sludge depth OK? .
EXISTING .
EXEMPTION.
2.7
- ' 3.13
erage Sludge layer thickness (T)
[Depth
11.5pe=Horizontal/vertical
of the lagoon from top of bank to bottom soil surface (D)
side slope (S)
3
3
Length at the top of inside bank (L)
179.5
179.5
Width at the top inside slope (W)
179.5
179:5
4.40
Thickness of existing liquid treatment zone (Y) -
.3.97
Length at midpoint of sludge layer (Lm)=L-2S(D-(T/2))
118.60
119.90
Width at midpoint of sludge layer (Wm)=W-2S(D-(T/2))
118.60
119.90
Volume of sludge (Vs)=Lm*Wm*T
37978.09
45020.93
Volume in gallons (Vsg)=Vs*7.481
294114.11
336756.54
Thickness of total treatment zone'(Z)=T+Y
7.10
7.10
Length at midpoint of total treatment zone (Lz)=L-2(S)(D-(Z/2))
131.80
131.80
Width at midpoint of total treatment zone (Wz)=W-2(S)(D-(Z/2))
131.80
131.80
Volume of totattreatment zone (Vz)=Lz*Wz*Z
123335.80
123335.80
Ratio(R) of sludge layer volume to total trmt volume
0.308
0.365
Sludge Volume Ratio:OK?. .. .
Maximum extension until end of permit cycle
12131/2.024,
Next survey to be done: (calendar yr)
Notification letter mailed:.
10/18/2.019
RECEVE oi'm MENR1MNR
OCT 2 3 2019
Water Quality Regional
Operations Section
WilrninZton Regional Office