NC0020389_NOV-2021-LV-0839 Response_20211006

Hayes. Mitch
From: Brian Leavitt <[e-mail]>
Sent: Wednesday, October 6, 2021 1:54 PM
To: Hayes, Mitch
Cc: Tim Robbins
Subject: [External] Town of Benson permit limit exceedence
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Mr. Hayes,
I am contacting you to report that the Town of Benson WWTP, NPDES Permit #0020389, has experienced an interruption
in our treatment process that will result in limit violations for weekly Ammonia Nitrogen, quarterly Total Phosphorous
and weekly BOD. We had some equipment failures in our aeration ditches earlier in the year that resulted in less ability
to provide good aeration and mixing. Our numbers have been trending upward over the last few months while waiting
on the replacement equipment to be delivered, but unfortunately there are excessive delivery times on the mixers we
ordered back in April. We had been able to remain in compliance up until this point, but believe we may have had
something dumped on us that has thrown the system out of balance. We got an exceedance warning from our
commercial lab for Ammonia Nitrogen and BOD. We have investigated and introduced countermeasures that are
looking for be turning things around, but wanted to notify you that the September eDMR will be in non-
compliance. Please let me know if you have any questions or require further information.
Thank you,
Brian Leavitt
Superintendent / ORC
Town of Benson WWTP
[phone]
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