NCS000574_Site Visit Emails_20141113

From: Randall, Mike
To: "Oaallo. Letova"
Cc: Bennett, Bradley; Georgoulias. Bethany _(bethany..georgoulias(a ncdenr.gov); Pickle. Ken
Subject: RE: Site visit?
Date: Thursday, November 13, 2014 8:28:00 AM
Thank you very much for allowing to visit the Cape Fear River facility. The visit was very useful and
helpful. I had the following observation:
1. Outfall SW-1 and Outfall SW-8 (also identified as Outfall 008)
Outfall SW-1 and Outfall SW-8 (also identified as Outfall 008) are legacy riser structures from inactive
ponds. NCDENR concurs that it would take greater than the 25-year, 24-hour storm event for there
to be a discharge form either of these outfalls. The heavily vegetated area basically functions as a
large dry detention pond. In the industrial stormwater permitting program, NCDEMLR considers
holding ponds that do not discharge in response to smaller storms as equivalent to a non -
discharging system (on the basis that more conservative design specifications for engineered non -
discharge systems use that same design storm criterion). The proposed permit condition is
consistent with that interpretation.
The stormwater outfall discharge from the Abandoned Ash Pond (1953) identified as SW-1 and
Abandoned Ash Pond (1963/1970) identified as Outfall SW-8 (also identified as SW-008) are not
considered a potential point source discharge to surface waters, as observed by DEMLR staff during
a site visit on November 12, 2014. At this time, SWO01 and SWO08 are not a regulated point
source discharge.
2. Outfall SW-2
Stormwater collected along the railroad track between the plant entrance road and the plant site
combines with drainage of and open field which is directed via outfall SW-2 into Shaddox Creek that
flows into the Haw River just above the confluence with the Deep River. DENR anticipates that the
demolition and/or closure of the site's ash ponds may soon be underway, and that the activity may
be begun and completed within the term of the stormwater permit. We would expect that some
aspects of the ash pond closure activity may present the potential for stormwater pollution, for
example, activities such as transport of ash by rail and/or along on -site haul roads. At this time,
Outfall SW-2 will be regulated as a stormwater discharge from an industrial activity.
We recognize that Duke Energy may elect to modify Outfall SW-2 either by re -grading and/or
installing a riser similar to the riser on outfalls SW-8 and SW-1. If modified the heavily vegetated
area would basically functions as a large dry detention pond. In the industrial stormwater permitting
program, NCDEMLR considers holding ponds that do not discharge in response to smaller storms as
equivalent to a non -discharging system (on the basis that more conservative design specifications for
engineered non -discharge systems use that same design storm criterion).
3. Outfall SW-3
Stormwater collected along the roadside swell beside the plant entrance road is directed via Outfall

SW-3 toward drainages that go to Shaddox Creek. Historically this location was selected to capture
potential impacts from an ash sluice line that crossed under the entrance road. Ash is no longer
sluiced and the line has been disconnected. DENR anticipates that the demolition and/or closure of
the site's ash ponds may soon be underway, and that the activity may be begun and completed
within the term of the stormwater permit. We would expect that some aspects of the ash pond
closure activity may present the potential for stormwater pollution, for example, activities such as
transport of ash by rail and/or along on -site haul roads. At this time, Outfall SW-3 will be
regulated as a stormwater discharge from an industrial activity. We also recognize that Duke
Energy may elect to modify Outfall SW-3 either by re -grading and/or installing a riser similar to the
riser on outfalls SW-8 and SW-1. If modified the heavily vegetated area would basically functions as
a large dry detention pond. In the industrial stormwater permitting program, NCDEMLR considers
holding ponds that do not discharge in response to smaller storms as equivalent to a non -
discharging system (on the basis that more conservative design specifications for engineered non -
discharge systems use that same design storm criterion).
4. Outfall SW-5
Stormwater collected in an open field along the entrance is directed via outfall SW-5 into Shaddox
Creek that flows into the Haw River just above the confluence with the Deep River. Outfall SW-5 is
not from an industrial activity.
5. Outfall from the Coal Pile
Stormwater collected in the coal pile area is discharged into Shaddox Creek. Duke Energy will need
to provide additional information to demonstrate that the coal and coal residual has been removed
and the area restored.
Mike Randall
Stormwater Permitting Program
NC Division of Energy, Mineral and Land Resources (DEMLR)
1617 Mail Service Center
Raleigh, NC 27699-1617
Office: 919-807-6374
Cell: 919-389-7801
Email correspondence to and from this address may be subject to public records laws
From: Ogallo, Letoya [ma iIto: [e-mail]]
Sent: Tuesday, November 11, 2014 11:19 AM
To: Randall, Mike
Subject: RE: Site visit?
Just curious, did you get any takers?

Toya
From: Randall, Mike [mailto: [e-mail]]
Sent: Friday, November 07, 2014 9:57 AM
To: Ogallo, Letoya
Cc: Bennett, Bradley; Pickle, Ken; Georgoulias, Bethany; Holley, John
Subject: RE: Site visit?
Does anyone want to tag along. I'll head out from the Archdale Building around 8:00 am.
Mike Randall
Stormwater Permitting Program
NC Division of Energy, Mineral and Land Resources (DEMLR)
1617 Mail Service Center
Raleigh, NC 27699-1617
Office: 919-807-6374
Cell: 919-389-7801
Email correspondence to and from this address may be subject to public records laws
From: Ogallo, Letoya [ma i Ito: Letoya. Ogal lo(a duke-eneray.com]
Sent: Thursday, November 06, 2014 3:21 PM
To: Randall, Mike
Subject: RE: Site visit?
Let's meet at gam. Will anyone else be attending?
From: Randall, Mike [mailto: mike. randaIl(abncdenr.gov]
Sent: Thursday, November 06, 2014 2:21 PM
To: Ogallo, Letoya
Subject: Re: Site visit?
*** Exercise caution. This is an EXTERNAL email. DO NOT open attachments or click links
from unknown senders or unexpected email. ***
Anytime between 8 and 2
Sent from my iPhone
Mike Randall
Stormwater Permitting Program NC Division of Energy, Mineral and Land Resources
(DEMLR)
Office: 919-807-6374

Cell: 919-388-7801
1617 Mail Service Center
Raleigh, INC 27699-1617
Email correspondence to and from this address may be subject to public records laws
On Nov 6, 2014, at 2:17 PM, "Ogallo, Letoya" <Letoya.OgalloCcDduke-energy.com> wrote:
Hi Mike,
I left you a message earlier this week to see if Wednesday 11/12 works for your
schedule. Does the date work for you? Can you let us know what time you'd like to
meet and who else will be attending?
Thanks,
Toya
Toya Ogallo I Environmental Specialist
Duke Energy NPDES Permitting and Compliance
410 South Wilmington Street, Raleigh NC 27601
o: 919.546.6647 1 c: 919.608.1793 1 f: 919.546.4409