NC0081825_Public Notice_20131121

Henson, Belinda
From: Montgomery, Lori
Sent: Thursday, November 21, 2013 2:25 PM
To: Henson, Belinda
Cc: Brantley, Mark
Subject: RE: NC0081825 Public Notice
Belinda —
I reviewed the historic permitting material in the Ansonville filecA-wasteload llocation model was run backduring the
original permitting'process: The -model -looks -at -differing B6D and NH3 levels to_cal.culate projecfed-DO-concentrations
in tlie.r.iver-downteeam of the dischaige--At some point; -the model,will reach a''`DO sag"; after whichpon he DO
reduction=frbTn the oxygen consuming waste will start to recover,again. For tf'iis fatility's.model; when -the secondary
�reatmen,t=limits were applied; the DO at"the lowest point downstream was'still-well above'the-water-qualifystandard of
,mg/I:Tfiis'is due o.the large amount of dilutionin the P_eeDee_River: (In,this case, the in= stream-waste7concentration
rs only 0,0%=at-the 7CZ10`flow) So,"forsituafions_likethis we do not apply a"DO limit 0r the=discharge;,.unle¢s'of course
e-pla.nt expands grsomething:ehanges=abou_t+the wastestrea
I hope this helps. Please let me know if you have any other questions, or would like to talk about this more.
Thanks!
Lori
Lori Montgomery, PE
North Carolina Division of Water Resources
NPDES, Complex Permitting Unit
165.0 Mail Service Center.
Raleigh, NC 27699-1650
phone: [phone]
•
DISCLAIMER: All e-mails sent to and from this account are subject to the North Carolina Public Records Law and may
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From: Henson, Belinda
Sent:. Wednesday, November 20, 2013 3:55 PM
To: Montgomery, Lori
Cc: Brantley, Mark
Subject: RE: NC0081825 Public Notice
Lori,
Mark and I had a productive visit with the Town of Ansonville today. We met with Mayor Ingram and the new ORC — Mr.
Mullis and Backup ORC- Mrs. Mullis. We also visited the WWTP. They have made a lot of progress with operational
changes to the plant and the facility looked really good today during our visit. They appear to be compliant with their
permit at this time: They have some reporting issues with their commercial lab and are working through those. One
question I have is why does this facility not have a Dissolved Oxygen requirement in their NPDES permit? I noticed
when I was looking at their present permit and I talked with Mark and he did not know why either? Thank you.
Belinda
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From: Montgomery, Lori
Sent: Wednesday, November 20, 2013 3:06 PM
To: Henson, Belinda
• Cc: Reid, Steve
Subject: NC0081825 Public Notice
NPDES Permit number NC0081825 (Town of Ansonville WWTP) will be sent out for public notice today. Draft cover
letter, permit, and fact sheet are attached.
Thank you,
Lori Montgomery PE
North Carolina Division of Water Resources
NPDES Complex Permitting Unit
1650 Mail Service Center
Raleigh, NC 27699-1650
phone: [phone]
DISCLAIMER: All e-mails sent to and from this account are subject to the North Carolina Public Records Law and may
be disclosed to third parties.
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