090173_Sludge Survey (Testing Dates)_20191018

REGEIVIZU
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DEWAR
ROY COOPER • kei
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Governor ) r'—Firfpr C„
MICHAELS.REGAN '•'T - OCT 2 2019
Secretary ' -
LINDA CULPEPPER NORTH CAROLINA
Director Environmental Quality • 141 A ETTE.VILL ii 'lOA1AL OFFICE
October 18, 2019
Bull Creek Farms LLC
Bull Creek Farms
304 Fox Lake Dr
Clinton,NC 28328
Subject: Sludge Survey Testing Dates
• Certificate of Coverage No. AWS090173
Bull Creek Farms
Animal Waste Management System
Bladen County.
Dear Bull Creek Farms LLC:
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 structures "F3" and"TW" at the Bull Creek 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 31,2021 for lagoon
structure"F3", and December 31,2024 for lagoon structure "TW".
The next sludge survey for lagoon"F3" at Bull Creek Farms should be performed before
December 31,2021.The next sludge survey for lagoon"TW" at Bull Creek 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(919) 707-3705 if you have any questions. • .
Sincerely,
•
Heath C. Robinson. .
Animal Feeding Operations Program
cc: lFay_etteville-Regional-Office,—Water Quality Regional Operations Section
Permit File'AWS090173
North Carolina Department of Environmental Quality I Division of Water Resources
Q-,,)D E 512 North Salisbury Street 11636 Mail Service Center I Raleigh,North Carolina 27699-1636
Depastsoul a + � ./'" 919.707.9000

ATi
Sludge Survey Evaluation Form Today's Date 10/18/2019
Facility# ;. 090173
Owner: Bull Creek Farms,LLC_
Lagoon ID F3
Sludge Survey Received:. 9/20/2019
Sludge Survey Performed: 12/5/2018
Sludge Depth(Row O):(ft) • .. 2.4
Existing Treatment Depth(Row P): (ft) 3.60
Start Date: 1/1/1996
Facility age at time of survey:(yr) 23
Average Sludge Accumulation.(ft/yr): . . . •. . . . 0:10
Requested Extension: (yr) 2
Requested Due Date. :. . 2021 .
Sludge Accumulation during extension"peiiod: (ft) . : 0.21
Treatment Depth Available after Extension: (ft) 3:39
Sludge level OK? : . L.mzt6;? t . -
Ratio Estimates Based on Depth EXISTING. EXEMPTION
Ratio of Sludge layer to total trmt depth 0.40 :0.43: •
Ratio of.Sludge depth OK? . . =NOr
' ' • EXISTING EXEMPTION
Average Sludge layer thickness(T) ';2.4 . : 2.61
Depth of the lagoon from top of bank to bottom soil surface(D) 9.7 . 9.7 .- .
Slope=Horizontal/vettical side slope(S) 3 3
Length at the top of inside bank(L) - ' 270 . 270 '
Width at the top inside slope(W). . . 270 270
Thickness of existing liquid treatment zone(Y) . . 3:60 3.39
Length at midpoint of sludge layer(Lm)=L-2S(D-(T/2)) 219.00 219.63
Width at midpoint of sludge layer(Wm)=W-2S(D-(T/2)) 219.00 219.63
Volume of sludge(Vs)=Lm*Wm*T 115106.40 125859.09
Volume in gallons:(Vsg)=Vs*7.481 . 861110.98 : ' 941426.00
Thickness of total treatment zone(Z)=T+Y ' , 6.00 6.00
Length at midpoint of total treatment zone(Lz)=L-2(S)(D-(Z/2)) 229.80 229.80
Width at midpoint of total treatment zone(Wz)=W-2(S)(D-(Z/2)) 229.80 229.80
Volume of total treatment zone(Vz)=Lz*Wz*Z 316848.24 - .316848.24
Ratio(R)of sludge layer volume to.total trmt volume 0.363 0.397:.
'Sludge Volume Ratio:OK?. : ;YES
Maximum extension until end of permit cycle .
Next.survey to be.done: (calendar yr). 12/31/2021
Notification letter mailed:. • : .' 10/18/2019

•
090173
Bull Creek Farms,LLC
:. TW:
9/20/2019
12/5/2018
1.2
4.90
1/1/1996
23
5
2024
026
4.64
• '_a,YES
•
EXISTING . .. EXEMPTION
0.20 ::. 0.24
EXISTING .. EXEMPTION
.1.2 1.46
3 3
180.6 180.6
180.6 : 180.6
..- 4.90 .. 4:64
•
126.60 127.38
126.60 127.38
19233.07 23715.90
143882.61 177394.90
6.10 6.10
141.30 141.30
141.3Q 141.30 .
. 121790.71 121790.71
0:158 0.1.95
.. x tYES
12/31/2024
• 10/18/2019