20150994 Ver 3_T01 Initial IR Report_20170608

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INADVERTENT RETURN (IR) REPORT June 8, 2017
Feature: Broad River (SA22)
PSNC T -001A Phase 2 Pipeline Project
Rutherford County, North Carolina
Name and company of person reporting IR: Justin MacDaniel (Lone Star
Directional Drilling — Project Manager) — Contractor for PSNC. Cell phone number is
[phone].
Responsible party: PSNC
Representative — Ben Childers
Telephone [phone]
Contractor performing HDD: Lone Star Directional Drilling
Date and time of IR: Saturday, June 3, 2017 at 12:45 pm.
How was IR detected: Colter Franks (Lone Star Directional Drilling - Foreman)
noticed drilling mud not returning to the mud pit and walked down to the river and saw
IR on far bank of river.
Location of the IR: Broad River at Station 1880+00 approximately 25' right of ROW,
downstream of large mid -stream sandbar. See attached map.
Type of material: Bentonite clay and water slurry — standard HDD drilling mud.
Description of IR and efforts to protect sensitive areas: The drilling operation
was stopped immediately upon noticing cloudy water along the west bank of the river.
The source of the drilling mud release was identified to be at the toe of the slope on the
west bank. Tom Perez (S&ME Environmental Inspector) was contacted following
cessation of drilling operations. No drilling was conducted on Sunday, June 4, 2017. On
Monday, June 5, 2017, the contractor infused Polly Swell product into the drilling mud
mixture to inhibit further release of drilling mud through the fracture. The Poly Swell
material required at least 12 hours to "set up," during which time no additional drilling
operations were conducted. Joey Lawler (S&ME Project Manager) reported incident to
Amy Annino of the North Carolina Department of Water Resources (Asheville Region)
by phone and David Brown of the US Army Corps of Engineers (USACE) on Monday,
June 5, 2017.
Drilling operations remained idle on Monday, June 5, 2017. On Tuesday, June 6, 2017,
Latex Construction (General Contractor) installed a turbidity curtain on the west bank of
the Broad River at the IR location and three additional turbidity curtains further
downstream to contain any further drilling mud that may flow into the river when drilling

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operations resume. Again, no drilling was performed on Tuesday, June 6, 2017. Tom
Perez performed an inspection June 6, 2017, assessing the containment measures and
documenting conditions.
Estimated size of IR (quantity and area): A fine layer of drilling mud impacted
the river bed for approximately 150 feet. Due to the quick action of the contractor and
environmental inspector, a minimal amount of drilling mud entered the river prior to the
halt in drilling operation. The estimated impact was approximately 500 gallons.
Proposed additional HDD activities: The designed length of the HDD is
approximately 2,000 feet. Inadvertent returns were noted during the drilling of the initial
pilot hole. A combination of the Poly Swell and impermeable turbidity curtain
containment should minimize further release when drilling operations resume. There will
be 3 reams (18" reamer, 28" reamer, and 36" reamer) after the pilot hole is completed
before pipe pull back, and 2 to 3 weeks before the entire HDD is complete.
Proposed final cleanup method: On completion of HDD activities, Lone Star
Directional Drilling will remove discernible drilling mud or turbid water from within the
containment area. If necessary, the mud will be removed by hand or vacuum truck as
appropriate. Upon completion of clean-up activities, turbidity curtains and other
containment materials will also be removed.
Party responsible for cleanup: Lone Star Directional Drilling
General comments: It appears that a majority of the drilling mud will be contained in
the turbidity curtains so as to minimize the impact to the river. The contractor immediately
ceased drilling operations, and acted in good faith to contain the drilling mud, and
immediately notified environmental monitors. The contractor and inspectors will
continue to monitor the area, remain alert for rain events and take actions necessary to
contain drill mud/turbid water in impacted area. Efforts to clean up the impacted will
commence following bore completion.
Attachment: IR Site Photographs 1-3.
IR Location Exhibit.

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Photo 1: View of Inadvertent Returns location. Drilling mud
was coming through a fracture at the toe of the west bank of
the Broad River at approximately Sta 1880+00 (25' north of the
easement). The HDD is generally perpendicular to the river.
Drilling was stopped immediately upon discovery.
Photo 2: View of the contractor (Lonestar and Latex) installing
the turbidity curtain at the IR location near bank of the Broad
River to contain drilling mud and minimize impact downstream.
Photo 3: Additional turbidity curtains were installed further downstream as a precautionary measure.
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INADVERTENT RETURNS REPORT
SITE PHOTOGRAPHS (06.03/06.17)
PSNC T -001A — Phase 2 Pipeline Project — Broad River
Rutherford County, North Carolina
Project No.: 7435-17-003 Photo Page 1 of 1

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