NCS000578_Email RE Nov 2015 Buck Follow Up Info_20151130

Bennett, Bradley
From: Pickle, Ken
Sent: Monday, November 30, 2015 12:03 PM
To: Cahoon, Steve
Cc: Bennett, Bradley; Randall, Mike; Georgoulias, Bethany
Subject: Buck follow-up information and coordination from 11/4/2015 site visit
Hi Steve,
Thanks for your assistance at Buck earlier this month. While there we discussed additional information and
confirmation needs to help us eventually process the two permit applications in hand.
General permitting: During our discussions at Buck I think we agreed to separately process both in-house applications,
one for the Steam Station, and one for the CTCC station. Please confirm that at this time it is still Duke's intent to permit
both facilities separately for stormwater discharges.
Buck Steam Station
• Please confirm the list of the site stormwater outfalls, and expand the list if necessary to fully identify all the site
outfalls. Provide updated site maps indicating any additional features:
o Immediately northeast of SWO02 there appeared to be one or two additional outfalls, apparently
previously unidentified.
o Along the river bank in the vicinity of outfall SW056, and continuing east to SW073 it was not clear that
all outfalls have been positively identified.
• Please provide information on the size of the storm that would cause an overflow or bypass from the Yard
Sump.
• Please refresh us on the status of the paired oil traps (north of the boat house) wrt any potential for discharges
from them. Although we discussed them while visiting, I can't recall the comments made about them.
• Please refresh me on the flow in SW002. My meeting notes seem to indicate that Duke reports a dry weather
flow in that outfall.
Buck CTCC Station
It appeared that there may have been some recent changes to the drainage features not reflected in the site
maps we currently have in hand. The drainage features and contributing areas east of the Admin/Control
Building around the entrance gate and CB40 are unclear to us. In the same general vicinity there appeared to be
an additional manhole south of the cooling towers not shown on our drawings. Please provide expanded and
updated drainage maps that show the full extent of all site stormwater drainage.
We need additional information on the pipe and drainage system that carries drainage from around the ash
basin into the catch basin that then flows to the stormwater pond. Hs this been submitted in the wastewater
application? Can this flow be removed from the stormwater drainage at the CT site?
While on site there was some confusion as to the ultimate destination of the water discharge from the o/w
separator immediately south of the steam turbine building. Please confirm that that flow does/does not go to
the stormwater drainage system.
Thanks for your assistance Steve. Please contact me with any questions.
Best Regards,
Ken

Ken Pickle
Stormwater Program Specialist
NCDENR I DEMLR I Stormwater Permitting Program
1612 Mail Service Center, Raleigh, NC 27699-1612
512 N. Salisbury St, Raleigh, NC 27604
Phone: [phone]
Fax: [phone]
Email: ken. pickle(a)ncdenr.gov
Website: http://portal.ncdenr.org/web/Ir/stormwater
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