NC0031046_Email_20220509 (2)

5/9/22, 11:34 AM Mail - Denard, Derek - Outlook
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 modification . This is what I
gather from what is stated on our webpage: hops://deq.nc.gov/about/divisions/water-resources/water-
quality-permittingLpdes-wastewater/permitting-process#Permit Modifications. Minor modifications
for ownership name change and some technical corrections.
I am starting in the new position in the Industrial Permitting 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
Email correspondence to and from this address is subject to the
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,
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5/9/22, 11:34 AM Mail - Denard, Derek - Outlook
Please see the attachment and the email below concerning NC0031046. Permittee proposes to install aeration in
catchment pond to remove MTBE and prevent future violations. Is an AtC is required to do this? Also, would this
be a minor permit medication?
Please advise...
Best Regards,
Ronald C. Boone, Environmental Program Consultant
NC Department of Environmental Quality, Division of Water Resources, Water Quality Regional Operations
Section, 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]
http://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: Wyatt, John M. <[e-mail]>; Smith, Brian L. <[e-mail]>
Subject: [External] Colonial Pipeline - Greensboro
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attachment to Report Spam.
Mr. Boone -
As per our recent phone call, Colonial Pipeline recently reported exceedances of the MTBE limit for Outfall 004
contained within NPDES Permit NC0031046. The exceedances were reported on the DMRs submitted 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 outfall is related to the documented plume of MTBE in the ground water upstream of the
outfall. This plume is being addressed under Incident #18110 . The attached map illustrates the outfall location
and the plume location in October 2021.
Colonial would like to install controls to address the presence of MTBE within this outfall. We are currently
investigating an aeration system of some type within the pond upstream of the outfall but are open to other ideas
from the experts assisting us. I know we agreed that this would likely involve a modification to the current permit
and or Corrective Action Plan. Is there anything we can do to expedite that or eliminate the need for a
modification?
I look forward to working with you on this. Colonial is committed to protecting the environment we work in.
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5/9/22, 11:34 AM Mail - Denard, Derek - Outlook
Maribeth Hughes, PE, CSP
Environmental Specialist
Colonial Pipeline Company
m. 704-458-3993 1 [e-mail]
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1
a
1
1
1
1
1
1
LEGEND
MONITORING WELL GAUGED AND
• SAMPLED SEMIANNUALLY
MONITORING WELL GAUGED AND
• SAMPLED ANNUALLY
O MONITORING WELL GAUGED ONLY
O WELL EQUIPPED WITH SKIMMER
PUMP
10 MTBE CONCENTRATION (pg/L)
NS
LNAPL
MTBE NOT DETECTED ABOVE
PRACTICAL QUANTITATION LIMIT
NOT SAMPLED
MEASURABLE LNAPL DETECTED;
WELL NOT SAMPLED
C AIR SPARGE WELL
C SOIL VAPOR EXTRACTION WELL
500 FOOT SURFACE WATER BUFFER
MTBE PLUME (APPROXIMATE)
20 - 200 pg/L
> 200 pg/L
M W-140 ®
MW-224
MW-181
MW-164
MW-188
MW-113
MW-27
<1
1
MW-
®
® MW9]
00
MW-88
LNAPL
•
MW-40 ( 815
MW-127
MW-128
O 32 •
MW-25
MW-161
• MW-54
C
CC
C C
6.9 C
® G
MW-186
5.6
C
MW-136
•
MW-45
<1 •
(M1W94 •
(J•• • •
MW-36
M W-98
MW-60
• !'r
0
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 pg/L
GROSS CONTAMINANT LEVEL FOR MTBE IS 20,000 pg/L
pg/L = MICORGRAMS PER LITER
J = INDICATES ESTIMATED CONCENTRATION ABOVE THE ADJUSTED METHOD
DETECTION LIMIT AND BELOWTHEADJUSTED REPORTING LIMIT
M1 W-18]
•
MW-85
0
®BM20083
W-
• M1W-41
• W 19]
<1
N
A
0 175 350
Feet
LOWER POND
MW-234
MW-233 MW-129
MW-227
LNAPL
MW-22 D
<1
MW-1
1
LNAPL
LNAPL
`MW-®
1.]
MW-130
MW-104
1
1 \
MW-20
<10 q
so �O' MW-14
Approximate
location of Outfall
004
MW-22
•
•
\
MW-21
• / /
MW-194 •
0
MW-219D
MW-220
MW-219
MW-118
c'l
I
/
/ / / .- •.
/ ` L A \\
O \ •
\ • ONO /
` \ \
,.
MW-221
M W-228
MW-229
LNAPL
MW-222
•
\.
POND i
MW-16•
mw-110 ®
M •
MW-103 ® •
$G!1
MW-114
M W-155 M W-154
853
/
/
1
1
1
C
1
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1
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CHECK BY: AS
DRAWN BY: CW
DATE: 6/8/2021
SCALE: AS SHOWN
CAD NO.: CPC20116-001
PRJ NO.: CPC20116-001
MTBE IN GROUNDWATER
(OCTOBER 2020)
GREENSBORO JUNCTION
COLONIAL PIPELINE COMPANY
GREENSBORO, NORTH CAROLINA
APEX
FIGURE
9