390002_Correspondence_20210615

[External] Fw: Sludge Survey Information - Blackwell
dona Blackwell <[e-mail]>
Thu 6/17/2021 11:14 AM
To: Bernard, Jane <jane.bernard@ncdenr,gov>
4 attachments (5 MB)
AWS390002_Sludge Plan of Action 6.2.2021.pdf; AWS390002_LagoonSludgeSurveyForm.pdf,
Lagoonbiosolidsremovalcalculationfinal (1).pdf, sludge-lagoon-closure-contractors-nc.pdf,
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Attached
----- Forwarded Message -----
From: Shepherd, Michael D <[e-mail]>
To: dona Blackwell <[e-mail]>
Cc: Byron Currin<[e-mail]>; Best, Terry - NRCS, Halifax, NC <terry.best©usda.gov>
Sent: Thursday, June 3, 2021, 09:32:33 AM EDT
Subject: Sludge Survey Information
Dona,
The results of sludge survey indicated a ratio of 0.67 which means a sludge plan of action must be completed and a
plan developed to cleanout the sludge. I have completed the plan of action for you and attached it. Forest will need
to sign the plan of action and send a copy of it to Jane Bernard jane.bemardCu7ncdenr.gps. If you would like for me to
email it to her on your behalf I'm happy to do that, just let me know.
I calculated some estimated numbers of acres it will take to land apply the sludge and due to the high level of
phosphorus it will take more acres than if going only off the nitrogen application rate. If you applied based off the
nitrogen rate of approximately 200 lbs./acre you would be applying 1,240 lbs/acre of phosphorus which could have
long-term effects on crops and water quality. I have attached two possibilities in the pre -planning worksheet. My
choice would be to apply at the 50 lbs./acre N rate which would be applying approximately 310 lbs./acre phosphorus.
At this rate it would take approximately 80 acres. This is all based on removing approximately 300,000 gals of sludge
which should put your ratio back to around 0.25 and leave approximately 2 feet of sludge. To clean the lagoon out
completely would be approximately 400,000 gallons and take approximately 105 acres.
know you mention y'all doing the cleanout but I wanted to provide some contractors information just so you have it if
you decide to go that route. I have attached a list of lagoon cleanout contractors that I have. This is list not conclusive
of everyone but gives some names. From what I have been told most of the contractors are charging around 3 cents
per gallon to remove and land apply the sludge. On a lagoon that size it shouldn't take them but a couple days.
Let me know if you have any questions.
Michael Shepherd
Environmental Senior Specialist
Division of Soil and Water Conservation

NC Department of Agriculture & Consumer Services
336-940-8901 — Cell
704-431-6762 - Office
www.ncagr.govlswc