HomeMy WebLinkAbout820051_Certificate of Coverage (COC)_20191018 4246,
RECEIVED
ROY COOPER yf a,d !D
Governor ) i�
MICHAEL S.REGAN " _^ r 0 C T 2 3 2019
Secretary
LINDA CULPEPPER NORTH CAROLINA
Director Environmental Quality • V QROS
FAYETTEVIL EC;ON'Al_Cl 5 C5
October 18, 2019 �.
A&B Hog Farms Inc . , ..
A&B Hog Farm
2207 Moores Bridge Rd
Rose Hill;NC 28458 •
Subject: Sludge Survey,Testing Dates
Certificate of Coverage No AWS820051
A&B Hog Farm • ..
Animal Waste Management System
Sampson County - .
Dear A&B Hog Farms Inc:
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"2200".at the A&B Hog Farm 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 "2200" at A&B Hog Farm should be performed
' before December 31,2024. Please retain this letter and keep it with your farm records for
reference.
•
Please call me at(919)707-3705 if you have any questions:
- Sincerely,
Heath C. Robinson
Animal Feeding Operations Program
cc: Fayetteville Regional Office,yater Quality Regional Operations Section
Permit File AWS820051
North Carolina Departmentof Environmental Quality i Division of Water Resources
D E Q S12 North Salisbury Street I 1636 Mail Service Center I Raleigh,North Carolina 2'7699-1636
rag=4:...ftd 919.707.9000
Sludge Survey Evaluation Form: Today's Date, 10/18/2019
Facility# 820051
Owner: Coats
Lagoon ID . ... 2200
Sludge Survey Received: 9/20/2019
Sludge Survey Performed: 11/5/2018
Sludge:Depth(Row O): (ft) 2
Existing Treatment Depth(Row P): (ft) 4.20
Start Date: . . . . .• . . . 01/01/92
Facility age at time Of survey:(yr) 27 '
Average Sludge Accumulation.(ft/yr): .,.0.07.
Requested Extension: (yr) 5 y
Requested Due Date. 2024 ..
Sludge Accumulation during extension period: (ft) 0:37
Treatment Depth Available after Extension: (ft) 3.83 .. , , . , .
Sludge level.OK?. . _.-r �0`�. .
Ratio Estimates'Based on Depth EXISTING: . EXEMPTION
Ratio of Sludge layer to total trmt depth 0.32 0.38
Ratio of.Sludge depth OK? .. ` YES: ,
EXISTING . . EXEMPTION.
Average Sludge layer thickness(T) _ ' 2 2.37
Depth of the lagoon from top of bank to bottom soil surface(D) 978 , 9.8
Slope=Horizontal/vertical side slope(S) 3 3
Length at the top of inside bank(L) 330 330
Width at the top inside slope(W) 200 200
Thickness of existing liquid treatment zone(I) 4.20 3.83
Length at midpoint of sludge layer(Lm)=L-2S(D-(T/2)) 277.20 278.32
Width at midpoint of sludge layer(Wm)=W-2S(D-(T/2)) 147:20 148.32
Volume of sludge(Vs)=Lm*Wm*T 81607.68 97924.59
Volume in gallons:(Vsg)=Vs*7.481 610507.05 732475.96
Thickness of total treatment zone(Z)=T+Y 6.20 6.20
Length at midpoint Of total treatment zone(Lz)=L-2(S)(D-(Z/2)) , 289.80 289.80
Width at midpoint of total treatment zone(Wz)=W-2(S)(D-(Z/2)) 159.80 159.80
Volume of total treatment zone(Vz)=Lz*Wz*Z 287122.25 .. 287122.25
Ratio(R)of sludge layer volume to total trmt volume :. . 0.284 _ , .0.341.
Sludge Volume Ratio:OK? 1:3,02., ,.,J
Maximum extension until end of permit cycle
Next survey to be.done: (calendar yr). . . . , . . . . .. . . . . 12/31/2024
Notification letter mailed:. 10/18/2019