NC0069841_Speculative Limits Request_20240425

5/1/24, 12:30 PM Mail-Denard, Derek-Outlook
Union County Water - new Crooked Creek WWTP Speculative Limits
Montebello, Michael J <[e-mail]>
Wed 5/1/2024 11:43 AM
To:Coco, Nick A <[e-mail]>
Cc:Denard, Derek <[e-mail]>;Litzenberger, Kristin S <[e-mail]>
0 1 attachments (3 MB)
NC0069841_Speculative Limits_LCCWRF_20210713.pdf;
As we discussed. They want a response back on the proposal.
MikeM
From: Lackey, Kent A. <[e-mail]>
Sent:Thursday,April 25, 2024 9:15 AM
To: Montebello, Michael J <[e-mail]>
Cc: Lofton,Aubrey<Aubrey.Lofton@ unioncountync.gov>; Shutak,John <[e-mail]>;
Hyong.Yi <[e-mail]>; Matthews, Brian <[e-mail]>;Jonathan
Jordan <[e-mail]>; Christopher.Clark<[e-mail]>;
[e-mail] <[e-mail]>
Subject: [External] Union County Water- new Crooked Creek WWTP Speculative Limits
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Mr. Montebello.
I appreciate the discussion this morning and apologize if my letter was confusing. Per our discussion I clarified
the intent of our letter was to confirm options prior to making a final decision by Union County Water and
submitting the necessary information for DEQ to review. The options we discussed are:
• You are going to verify that if Union County Water decides to move the discharge to the original Site A then
the speculative limits issued on July 13, 2021 (included for ease of use) would still be valid for the flows
included in the original letter(4.6 mgd and 8.2 mgd).
• If UCW discharges at Site A and wants to use the updated flow amount of 6 mgd then they would need to
submit the WQ modeling results for that flow rate at the Site A location requesting the limits be re-issued
based on the new flow rate.
• I verified that our subsequent modeling has demonstrated that a discharge at or below Highway 601 will
achieve a minimum instream DO of 5 mg/l. You confirmed that if Union County Water chose to move to a
discharge location below Highway 601 to any location other than Site A then they would need to submit
the water quality modeling data demonstrating the minimum instream dissolved oxygen concentration was
compliant with the 5.0 mg/I dissolved oxygen standard. DEQ would then review the submitted information
prior to issuing new speculative limits provided all requirements were met.
Thanks again for the discussion this morning and I apologize again for any lack of clarity in our letter.
Kent A.Lackey, P.E.
Senior Vice President
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5/1/24, 12:30 PM Mail-Denard, Derek-Outlook
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