Prospect Hill Quarry ADI Response Letter 12-13-2021

11SUNROCK�
CAROLINA SUNROCK LLC
Scott Martino
Manager Environmental Compliance
200 Horizon Drive, Suite 100
Raleigh, NC 27615
CERTIFIED MAIL No. 7020 3160 0000 2173 7386
Return receipt Requested
December 11, 2021
Mr. Adam Parr
Assistant State Mining Engineer
Department of Environmental Quality
Division of Energy, Mineral, and Land Resources — Land Quality Section
1612 Mail Service Center
Raleigh, NC 27699-1612
RE: Carolina Sunrock LLC — Prospect Hill Quarry and Distribution Center
1238 Wrenn Road
Prospect Hill, Caswell County, North Carolina 27314
Dear Mr. Parr:
The purpose of this letter is to provide you and your department the additional information to Carolina
Sunrock LLC's application for a mining permit as requested per your email dated December 10, 2021.
Please find attached to this letter a memo prepared by our consult, Piedmont Geologic whom issued and
conducted the hydro study associated with our permit application (May 7, 2020). This Memo address and
clarifies the previously provided Mitigation Plan for Quarry Pit Dewatering.
Thank you for the opportunity to address your and other agency comments provided on our latest
application submittal. Please feel free to contact me if you or your department have any further
questions.
Thank you for your assistance.
Sincerely,
Carolina Sunrock, LLC
Scott Martino
Manager Environmental Compliance
Enclosure
Mitigation Plan Memo
[e-mail]
Phone: 919, 747.6336
Fax: [phone]

PIEDMONT
GEOLOGIC
SMART EARTH SOLUTIONS
December 13, 2021
Mr. Scott Martino
The Sunrock Group
200 Horizon Drive, Suite 100
Raleigh, North Carolina 27615
6003-145 Chapel Hill Rd
Raleigh, INC 27607
P: 919-854-9700 P 919-854-9532
www pledmontgeologic.com
RE: Updated Residential Water Supply Well Mitigation Plan/Adverse Impact Letter
Proposed Quarry Site
Prospect Hill, North Carolina
Dear Mr. Martino:
This letter is in response to a December 10, 2021 email from Mr. Adam Parr (North Carolina Department of
Environmental Quality) to Carolina Sunrock regarding the Revised Hydrogeological Study Report (the "report")
completed by Piedmont Geologic (dated May 7, 2020) for the proposed Carolina Sunrock quarry site in Prospect
Hill, North Carolina (the "site"). Specifically, Mr. Parr requested an update to the Residential Water Supply Well
Mitigation Plan/Adverse Impact Letter contained in Section 8.2 of the report, with verbiage to explicitly state that
the temporary water source to be provided by Sunrock would be potable. The revised Residential Water Supply
Well Mitigation Plan/Adverse Impact Letter is provided in the text below.
Residential Water Supply Well Mitigation Plan/Adverse Impact Letter
Should a problem occur with a residential water -supply well, the property owner should notify Carolina Sunrock
LLC or NCDEQ of the water supply well issue. The proposed procedures to address complaint/concerns are
outlined below:
a. An analysis will be made to determine whether or not the water supply well in question is located within
the projected zone of influence from quarry dewatering as it exists at the time of the notice.
b. A Carolina Sunrock LLC representative, or designated agent (a qualified well repair/installation specialist),
will evaluate the condition of the water -supply well to determine the cause of the issue.
c. If a determination is made that the well issue is due to mechanical reasons not related to drawdown from
the quarry, the NCDEQ will be notified, and the procedures outlined in this mitigation plan will not be
applicable. The property owner will be notified of the findings of this determination and will be
responsible for any necessary repairs.
d. If a determination is made that the well issue is due to a decline of groundwater level that has been caused
or is a direct result of mining activities or dewatering of the pit, then Carolina Sunrock LLC, at its expense,
will proceed as quickly as reasonably possible to provide a functioning, permanent water supply to the
property owner, either by rehabilitation, repair, or deepening of the existing water supply well; or drilling
of a new water -supply well of the same diameter; or by connecting the residence to a public potable water
supply, if available. Carolina Sunrock LLC, or a designated agent (a qualified well repair/installation

Updated Residential Water Supply Well Mitigation Plan/Adverse Impact Letter
Proposed Quarry Site, Prospect Hill, North Carolina
December 13, 2021
specialist), will evaluate the existing water -supply system to determine the most reasonable method
available to restore the permanent water supply. The options available must be capable of meeting the
minimum volume used or needed by the property owner before the disruption of water -supply occurred.
e. Based on the time necessary to re-establish a permanent supply to the property, it may be necessary to
arrange with a licensed and reputable water distributor to provide the affected user with a temporary
potable water supply. This water supply will be for use in normal household activities, such as bathing,
washing, drinking, and sanitary facilities. This supply will be in the form of a clean -water tanker or
container that will be refilled as needed, all at the expense of Carolina Sunrock LLC.
This mitigation plan relies on the use of qualified outside vendors to satisfy the needs of a temporary water supply
and to develop a permanent water source for those wells verified by a qualified third -party expert to have had a
direct impact from quarrying activities. As licensed reputable companies, they are expected to accomplish and cant'
out their assigned duties in a manner that ensures that all work is completed within a predetermined time period. If
for any reason, this work is not completed to an acceptable level of quality and or within the time frame agreed upon
by all parties, the outside vendor will be replaced by another company designated by Carolina Sunrock LLC.
Sincerely,
JanathawtV. Mvrph*-ey
Jonathan D. Murphrey, P.G.
Staff Geologist
cc: Peter Dressel, Piedmont Geologic
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