820271_Sludge Testing Dates_20200127

�,� EL;LiVLD
ROY COOPER ` 4),E✓y;:(' r' 1.. • DE QLW
Governor. . ,,c
MICHAELS.REGAN. "u�° JAN`
Secretary ' ,� ZQ2�.
LINDA CULPEPPER : :. • NORTH CARoLiniA: : :
Director Environmental Quality• g p�
AYE T T,E ILLS R G1QN41..OFFICE
January27, 2020 _ : :.
Hog Slat.Inc. . • .
.
PO.Box 30.0 . . .
Newton Grove NC _28366. .:
Subject:':Sludge_Survey.Testing Dates: •.
" • . Certificate of Coverage No. AWS820271 •
Animal Waste Management System
ampson County
•
Dear.Hog Slat Inc.:.
= I The Division of Water Resources (Division)received your sludge survey information on January :
13; 2020...With the survey results, you requested an extension of the,sludge:survey requirement . . .
: for Lagoon 2(NEW) at.TDM#5 facility: Due to the amount of treatment volume available; and :" :
the rate of sludge accumulation_for the lagoon, the Division feels that an extension is riot: .
: appropriate at this time. _- .
The:next sludge:survey.for Lagoon•2'(NEW):at TDM#5"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: • : : :
Sincer ely; ::
•Heath C. Robinson . .
• Animal Feeding Operations Program : :
Cc: Fayetteville=Regionat••Office, Water Quality Regional:Operations Section.
Permit File AWS820271•'
•
•
•
•
•
•
•
`D North Carolina Department of Environmental Quality I Division of Water Resources E Q S12 North Salisbury Street 11636 Mail Service Center I Raleigh,North Carolina 27699-1636
omrma�rmm 919.707.9000-

•
Sludge.Survey Evaluation•Forma Today's.Dte; 011e&gtiR
Facility# . . 8202,71
Owner: Hog Slat Inc
Lagoon ID: . TDM:5:/:Lagoon 2:(NEW). ..
Sludge Survey Received:. 1/13/2020
Sludge Survey Performed .. - - 12/27/2019 . .
Sludge Depth"(Row:0):"(ft)
Existing Treatment Depth (Row P):(ft);
Start Pate: ..- :." .: 9/L/1993
Date of previous Sludge Survey 12/26/20'14 :.
Previous Sludge Depth:(ft) : A„al
Previous Treatment Depth:(ft) ,
Time Since Previous Sludge Survey:(yrs) :5
' Requested Extension:(yr) •
Requested Due Date: . : . . 12/31/2020
:. Rate of Sludge Accumulation:.(ft/yr) • : " • - • 0.24 : •
Sludge Accumulation DuringExtenson Period:(ft) 0.24
Treatment Depth Available After Extension:(ft); 4.96
Sludge Level_Okay?. • .. AYES
: Ratio Estimates Based:on Depth • : EXISTING EXEMPTION
Ratio of f Sludge Layer to Total Treatment Depth 0.39 0.42 '
Ratio of Sludge Depth Okay?
:.EXISTING EXEMPTION
Average Sludge Layer Thickness(T) • : 3.30. 3:54
Depth of lagoon from top of bank to bottom soil surface•
Slope-=Horizontal/Vertical-Side Slope"(S) - NA
Length at the:Top of the Inside Bank;(L) (1 - NA.
Width at tbe:Top.Inside Slope:(W): NA
Thickness of Existing Liquid Treatment Zone(Y)
Length:at Midpoint of Sludge Layer.(Lm)=L-2S(D=(T/2)) • • • #VALUEI • #VALUEI
Width at Midpoint of Sludge Layer(Wm)=W-25(D.-(1/2)) #VALUEI #VALUE!" •
— Volume of Sludge(Vs)=Lm*Wm*T - - - #VALUEI #VALUEI
Volume of Sludge i.n Gallons(Vsg)=Vs*7.481 #VALUE! #VALUEI:
Thickness of Total Treatment Zone(Z)=T+Y
Length at Midpoint of.Total Treatment Zone(Lz)=L-2(S)(D-(Z/2)) #VALUE! #VALUE!,
- Width at Midpoint of Total Treatment Zone(Wz)=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 #VALUEI #VALUE!
•
Sludge Volume Ratio Okay? : :.' #VLU:E!
Maximum Extension Until End of Permit Cycle
Next Survey to.be Done:.(calendar.Year) ) .. 12/'/2020 .
Notification Letter Mailed: • : : : 1►/27/2020