NC0031046_Email_20220509

5/9/22, 11:34 AM Mail - Denard, Derek - Outlook
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Re: [External] Colonial Pipeline - Greensboro
Denard, Derek <[e-mail]>
Mon 5/9/2022 11:17 AM
To:Boone, Ron <[e-mail]>;Hennessy, John <[e-mail]>;Corporon, Joe
<[e-mail]>
Cc:Snider, Lon <[e-mail]>;Graznak, Jenny <[e-mail]>
Ron,
According to Session Law 2011-394 (July 1, 2011), industrials don't need an ATC. Since they are
proposing a new treatment component, they might need a major permit modificaon . This is what I
gather from what is stated on our webpage: hps://deq.nc.gov/about/divisions/water-resources/water-
quality-perming /npdes-wastewater/perming-process#Permit_Modificaons. Minor modificaons
for ownership name change and some technical correcons.
I am starng in the new posion in the Industrial Perming Unit next week, please have them
coordinate with Joe Corporon or John Hennessy.
Thanks,

Derek Denard
Environmental Specialist
N.C. Division of Water Resources
N.C. Department of Environmental Quality

919 707 3618 office
919 707 9000 main DWR
[e-mail]

1617 Mail Service Center
Raleigh, NC 27699-1617

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North Carolina Public Records Law and may be disclosed to third parties.

From: Boone, Ron <[e-mail]>
Sent: Monday, May 9, 2022 11:04 AM
To: Hennessy, John <[e-mail]>; Denard, Derek <[e-mail]>; Corporon, Joe
<[e-mail]>
Cc: Snider, Lon <[e-mail]>; Graznak, Jenny <[e-mail]>
Subject: FW: [External] Colonial Pipeline - Greensboro

All,
5/9/22, 11:34 AM Mail - Denard, Derek - Outlook
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Please see the aachment and the email below concerning NC0031046. Permiee proposes to install aeraon in
catchment pond to remove MTBE and prevent future violaons. Is an AtC is required to do this? Also, would this
be a minor permit medicaon?

Please advise…

Best Regards,

Ronald C. Boone, Environmental Program Consultant
NC Department of Environmental Quality, Division of Water Resources, Water Quality Regional Operaons
Secon, Winston-Salem Regional Office
450 West Hanes Mill Road, Suite 300
Winston-Salem, NC 27105
Main: 336-776-9800
Direct: 336-776-9690
Mobile: [phone]
Fax [phone]
[e-mail]
hp://deq.nc.gov/about/divisions/water-resources

Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties.

From: Hughes, Maribeth <[e-mail]>
Sent: Friday, May 6, 2022 2:52 PM
To: Boone, Ron <[e-mail]>
Cc: Wya, John M. <[e-mail]>; Smith, Brian L. <[e-mail]>
Subject: [External] Colonial Pipeline - Greensboro

CAUTION: External email. Do not click links or open aachments unless you verify. Send all suspicious email as an
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Mr. Boone -

As per our recent phone call, Colonial Pipeline recently reported exceedances of the MTBE limit for Ouall 004
contained within NPDES Permit NC0031046. The exceedances were reported on the DMRs submied in March
and April 2022 and ranged from 25.9 ug/L to 45.1 ug /L (the permit limit is 19 ug /L). We believe that the presence
of MTBE within this ouall is related to the documented plume of MTBE in the ground water upstream of the
ouall. This plume is being addressed under Incident #18110 . The aached map illustrates the ouall locaon
and the plume locaon in October 2021.

Colonial would like to install controls to address the presence of MTBE within this ouall. We are currently
invesgang an aeraon system of some type within the pond upstream of the ouall but are open to other ideas
from the experts assisng us. I know we agreed that this would likely involve a modificaon to the current permit
and or Correcve Acon Plan. Is there anything we can do to expedite that or eliminate the need for a
modificaon?

I look forward to working with you on this. Colonial is commied to protecng the environment we work in.

5/9/22, 11:34 AM Mail - Denard, Derek - Outlook
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Maribeth Hughes, PE, CSP
Environmental Specialist
Colonial Pipeline Company
m. 704-458-3993 | [e-mail]

Colonial Pipeline Notice - This e-mail message (including any attachment) contains information that may be
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recipients is not authorized and may be unlawful.
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LOWER POND
POND
CHECK BY: AS
DRAWN BY: CW
DATE: 6/8/2021
SCALE: AS SHOWN
CAD NO.: CPC20116-001
PRJ NO.: CPC20116-001
9
FIGURE
MTBE IN GROUNDWATER
(OCTOBER 2020)
GREENSBORO JUNCTION
COLONIAL PIPELINE COMPANY
GREENSBORO, NORTH CAROLINA
LEGEND
!>MONITORING WELL GAUGED AND
SAMPLED SEMIANNUALLY
!?MONITORING WELL GAUGED AND
SAMPLED ANNUALLY
!(MONITORING WELL GAUGED ONLY
!!(WELL EQUIPPED WITH SKIMMER
PUMP
MTBE CONCENTRATION (µg/L)
MTBE NOT DETECTED ABOVE
PRACTICAL QUANTITATION LIMIT
NOT SAMPLED
MEASURABLE LNAPL DETECTED;
WELL NOT SAMPLED
!(AIR SPARGE WELL
!(SOIL VAPOR EXTRACTION WELL
500 FOOT SURFACE WATER BUFFER
MTBE PLUME (APPROXIMATE)
20 - 200 µg/L
> 200 µg/L
110
<
NS
LNAPL
¯
0 175 350
Feet
NOTE: DATA FROM GASOLINE SIDE OF FACILITY USED TO GENERATE
THIS FIGURE.
DEEP WELLS ARE NOT USED FOR CONTOURING.
REVISED SEMIANNUAL GROUNDWATER SAMPLING PLAN APPROVED
BY NCDEQ ON APRIL 8, 2019.
2L STANDARD FOR MTBE IS 20 µg/L
GROSS CONTAMINANT LEVEL FOR MTBE IS 20,000 µg/L
µg/L = MICORGRAMS PER LITER
J = INDICATES ESTIMATED CONCENTRATION ABOVE THE ADJUSTED METHOD
DETECTION LIMIT AND BELOW THE ADJUSTED REPORTING LIMIT
819