820097_Sludge Survey (Testing Dates)_20200127

ySTATEq' 9 \Eib1VD
,a DEQI WR
ROY.COOPER .. ` t+`
Governor h
MICHAEL S.REGAN `. .,.
Secretary WO S
LINDA CIJLPEPP.ER NORTH CAROLINA: 6ayEri-cs !!I d= ,�da�ilf; 1 I _
Director Environmental Quality . •
January27,2020
B &W Hog:Farms Inc
A&W Farm
3340 Giddensville RD : . .
•
.Faisoii,•NC 28341 : :
Subject: :Sludge Survey,Testing Dates...
• Certificate of Coverage No. AWS820097'` .:
•
Amin .Waste Management System •
Sampson County
Dear B &W Hog Farms Inc:
The Division'.of Water Resources.(Division)received:your sludge survey information on January
, 1.4, 2020. With the survey results,.you requested an.extension of the sludge:survey-requirement
for Lagoon#1 at A&W Farm:facility. Due to the amount of treatment volume available, and the y •
• rate of sludge accumulation for the lagoon; the Division feels that an extension is not.appropriate
at this time.. . .. .
The:next sludge survey.for Lagoon#1 at A&W.Farm should be performed before December 31;
2020: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:
r
Since ely
Heath C. Robinson
Animal Feeding Operations Program,
Cc: Fayetteville Regional'Office, ater Quality Regional Operations Section.
Permit FileAWS820097
North Carolina Department Environmental Quality I Division of Water Resources
D E 512 North Salisbury Street 1636 Mail Service Center I Raleigh;North Carolina 27699-1636. .
aw�.mm . : 919.707.9000

Sludge Survey Evaluation Form. Today's.Date.: SO/2020 •
: Facility# 820097
Owner: '. B&W11 3DlaiBig OM
Lagoon ID.. . Lagoon 1...
Sludge Survey.Received:. : : 1/14/2020
Sludge Survey Performed: ... 12/L/2019
Sludge De th Row 0 ft
Existing Treatment Depth(Row P):(ft)
Start Date:. .: 12/�/1992
Date of previous Sludge Survey 12/26/2014
Previous Sludge Depth:(ft)
Previous Treatment Depth:(ft)
Time Since Previous Sludge Survey:(yrs). • 5
Requested Extension:(yr)
Requested Due Date: 1 1 - 12/31/2020 >.
Rate of Sludge Accumulation: ft/yr - 0.06
Sludge Accumulation During:Extenson Period:(ft) : 0.06. :
Treatment Depth Available After Extension:(ft) 3.44
Sludge Level Okay' : : :
Ratio Estimates Based on Depth .. , . EXISTING •EXEMPTION
Ratio of Sludge Layer to Total Treatment Depth s 0.43 0:44
Ratio of Sludge Depth Okay? : :
EXISTING EXEMPTION
Average Sludge Layer Thickness.(T) : . : 2.60 : : _ 2.66: •
Depth of lagoon from top of bank to bottom soil surface(D): G1 na
Slope=Horiiontal/Vertical Side Slope(S)
Length at the Top of the Inside Bank(L) na .
Width at the Top.Inside SloOe:(W) giff3 na
Thickness of Existing Liquid Treatment Zone(Y) .' 3.50: : . 3;44:
Length at Midpoint of Sludge.Layer.(Lm)=L-2S_(D=(T/2)) i s ;. :#VALUE! #VALUE!
Width at Midpoint of Sludge Layer(Wm)=W-2S(D-(T/2)) #VALUE! #VALUE!
: Volume of Sludge(Vs)=Lm*Wm*T #VALUE! : #VALUE! - '
Volume of-Sludge.in Gallons(Vsg)=Vs*7.481 #VALUE! #VALUE!:
Thickness of Total Treatment Zone(Z)=T+Y• 6.10 6:10
Length at Midpoint of.Total Treatment Zone(Lz)=L-2(S)(D-(Z/2)) ' • .'#VALUE! #VALUE!
Width at Midpoint of Total Treatment Zone(Wi)=W 2(S)(D-(Z/2)) #VALUE!
#VALUE! .' :
Volume of.Total Treatment Zone(Vz)=Lz*Wz*Z . * .#VALUE!. #VALUE!
Ratio(R)of Sludge Layer Volume to Total Treatment Volume #VALUE! . #VALUE!
Sludge Volume Ratio Okay? . • • • :: F#VA.LUE_::; , . ;
Maximum Extension Until.End of Permit.Cycle
Next Survey to".be Done:.(Calendar Year) . .. . - . .• . . . : 12/ /2020
Notification:Letter Mailed:: /2020