510007_Correspondence_Sludge Survey_20191018

ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
LINDA CULPEPPER
Director
Donald E Byrd
Donald E Byrd
755 Powhatan Rd
Clayton, NC 27527
Dear Donald E Byrd:
NC Dept of Environmental Quality
OCT 2 3 2019
Raleigh Regional Office
NORTH CAROLINA
EnAronmental Quatity
October 18, 2019
Subject: Sludge Survey Testing Dates
Certificate of Coverage No. AWS510007
Donald E Byrd
Animal Waste Management System
Johnston 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 "1" at the Donald E Byrd 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 "1" at Donald E Byrd 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,
Heath C. Robinson
Animal Feeding Operations Program
CC: Raleigh Regional Office, Water Quality Regional Operations Section
Permit File AWS510007
D � North Carolina Department of Environmental Quality I Dlvislon of Water Resources
512 North Salisbury Street i 1636 Mall Service Center I Ralciyh. North Carulina 27699 1636
r��\ 919.707.9000

Sludge Survey Evaluation Form
Today's Date
10118'2019
Facility #
510007
Owner:
Donald Byrd
Lagoon ID
I
Sludge Survey Rr -.cive i
9120/2019
Sludge Survey Performed:
1111912018
Sludge Depth (Row O): (ft)
2.9
Existing Treatment Depth (Row P): (ft)
6.30
Start Date:
813/1992
Facility age at time of survey:(yr)
26
Average Sludge Accumulation (ft/
0.11
Requested Extension: (yr)
5
Re nested Due Date
2024
Sludge Accumulation during extension period: (ft)
0.55
Treatment Depth Available after Extension: (ft)
5.75
Sludge level OK?
YES
Ratio Estimates Based on Depth
EXISTING
EXEMPTION
Ratio of Sludge layer to total trmt depth
0.32
0,38
Ratio of Sludge depth OK?
iSlope=Horizontal/vertical
YES
EXISTING
EXEMPTION
Average Sludge layer thickness (T)
2.9
3.4
Depth of the lagoon from top of bank to bottom soil surface
13
13
side slope (S)
3
3
Length at the top of inside bank (L)
19
196
Width at the top inside slope (W)
19
196
Thickness of existing liquid treatment zone (Y)
6.3
5.75
Length at midpoint of sludge layer (Lm)=L-2S(D-(I 2))
126.70
128.35
Width at midpoint of sludge layer (Wm)=W-2S(D-(i 2))
126.70
128.35
Volume of sludge (Vs)=Lm*Wm*T
46553.38
56854.86
Volume in gallons (Vsg)=Vs*7.481
348265.84
425274.36
Thickness of total treatment zone (Z)=T+Y
9.20
9.20
Length at midpoint of total treatment zone (Lz)=L-2(S)(D-(Z 2))
145.60
145.60
Width at midpoint of total treatment zone (Wz)=W-2(S)(D-(Z'2))
145.60
145.60
Volume of total treatment zone (Vz)=Lz*Wz*Z
195034.11
195034.11
Ratio(R) of sludge layer volume to total trmt volume
0.239
0.292
Sludge Volume Ratio OK?
YES
Maximum extension until end of permit cycle
Next survey to be done: calendar r
12/31/2024
Notification letter mailed:
10(18i2019