20140650 Ver 1_T021B Final_Return_Report20141103_20141104

INADVERTENT RETURN, FINAL REPORT
Project Name: PSNC Line T021 B
S &ME Project No. 7235 -14 -039
USACE Action ID No: SAW- 2014 -00846
DWQ Project No: 14 -0650
Company and name of person conducting clean -up:
PSNC
Ben Childers, Construction Superintendent
800 Gaston Road
Gastonia, N.C. 28052
704.718.4234
Responsible Party:
PSNC
Contractor that performed HDD work:
Southeast Directional Drilling (Drilling Contractor)
Date and time of inadvertent return:
October 24, 2014; - 4:45 pm
Initial Notification and Reporting:
Via email October 24, 2014; 5:57 pm. Initial Report via email October 26, 2014; 3:34
pm
Location of the inadvertent return:
Stream 1, Back Creek
Type of material:
Bentonite clay and water slurry - standard HDD drilling mud.
Estimated size of inadvertent return (quantity and area):
An area approximately 25 feet wide by 25 feet long was affected. The contractor
estimated less than 100 - gallons of slurry were released. The inadvertent return is
localized along the north east side of the existing gas line right -of -way just north of
the construction corridor; approximately 10 -feet from the east bank within the stream
substrate. A visible deposition of drilling return, less than one inch, was noted within
the contained area.
Description of environmentally - sensitive areas, and their location in relation to
the inadvertent return:
The inadvertent return occurred within Stream 1, Back Creek. The area is localized
and other Waters of the U.S. appear not to be affected by the event. Back Creek

Inadvertent Return, Final Report SWE Project No. 7235 -14 -039
PSNC Line T021 B, Stream 1 November 3, 2014
drains to the Haw River which is approximately 2,000 linear feet downstream from
the site.
Description of the methods used to clean up and secure the site:
The contractor removed drilling mud that had accumulated within the coffer dam and
disposed of the material by pumping the fluid, via submersible pump, back to the up
gradient mud pit located within uplands. Upon completion of drilling activities, the
inadvertent return location was evacuated of water and any deposited material
removed by hand. Upon completion of clean -up activities, the coffer dam was
removed and the stream allowed to flow in a normal fashion. Stream banks were
not disturbed during clean -up activities.
General comments:
This Final Report is being provided as a follow -up to our initial report, dated October
26, 2014. Clean up activities initiated and were completed on October 29, 2014,
please see attached Representative Photographs.
Attachment: Representative Photographs

Photo 1: View of inadvertent return location. Photo 2: View 4 -inch submersible pump.
Photo 3: Area post clean up.
Photo 4: Additional view of post clean up.
REPRESENTATIVE SITE PHOTOGRAHPS
Line T021 B Pipeline Project— Stream 1
Alamance County, North Carolina
Photo Page 1 of 1
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Photo 4: Additional view of post clean up.
REPRESENTATIVE SITE PHOTOGRAHPS
Line T021 B Pipeline Project— Stream 1
Alamance County, North Carolina
Photo Page 1 of 1