WQ0035749_Additional Information_20190712

ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
LINDA CULPEPPER
Director
TIM M. LITTLE — CHIEF ENGINEER
NORTH CAROLINA
Environmental Quality
July 12, 2019
NORTH CAROLINA DEPARTMENT OF TRANSPORTATION
1536 MAIL SERVICE CENTER
RALEIGH, NORTH CAROLINA 27601-1536
Subject: Application No. WQ0035749
Additional Information Request
NCDOT DGS and HOS DCAR
Distribution of Class A Residuals
Statewide
Dear Mr. Little:
Division of Water Resources' Central and Regional staff has reviewed the application package
received July 1, 2019. However, additional information is required before the review may be completed.
Please address the items on the attached pages no later than the close of business on August 12, 2019.
Please be aware that you are responsible for meeting all requirements set forth in North Carolina
rules and regulations. Any oversights that occurred in the review of the subject application package are
still the Applicant's responsibility. In addition, any omissions made in responding to the outstanding items
in Sections A through H, or failure to provide the additional information on or before the above requested
date may result in your application being returned as incomplete.
Please reference the subject application number when providing the requested information. All
revised and/or additional documentation shall be signed, sealed and dated (where needed), with two paper
copies and one electronic copy submitted to my attention at the address below.
If you have any questions regarding this request, please do not hesitate to contact me at (919) 707-
3659 or [e-mail]. Thank you for your cooperation.
Sincerely,
Eric Saunders, Engineer
Division of Water Resources
cc: Mooresville Regional Office, Water Quality Regional Operations Section (Electronic Copy)
Kelly Seitz, PE (Electronic Copy)
Casey P. Hurley, PE (Electronic Copy)
Permit Application File WQ0035749
North Carolina Department of Environmental Quality I Division of Water Resources
_ 512 North Salisbury Street 1 1617 Mall Service Center 1 Raleigh, North Carolina 27699-1617
�.: 919.707.9000

Mr. Tim M. Little
July 12, 2019
Page 2 of 3
A. Signature Authority:
1. Per Application Instruction A and 15A NCAC 02T .0106(b)(4), the application shall be signed by
an executive officer, elected official in the highest level of elected office, or any authorized
employee. Please either submit a delegation letter pursuant to the requirements in 15A NCAC 02T
.0106(c) authorizing Pat Ivey to sign on behalf of the Applicant, or resubmit the application with
the proper signing official.
B. Pronerty Ownership Documentation:
1. Per 15A NCAC 02T .0106(b), provide property ownership documentation for the land containing
the proposed temporary containment ponds that demonstrates the Applicant has one of the
following:
a. legal documentation of ownership, such as a contract, deed, or article of incorporation;
b. an agreement of an intent to purchase the property that is written, notarized, and signed by both
parties, accompanied by a plat or survey map; or
c. an agreement to lease the property that is written, notarized, and signed by both parties,
indicating the intended use of the property, accompanied by a plat or survey map. Lease
agreements shall adhere to the requirements of 15A NCAC 02L .0107.
C. Site Man f 15A NCAC 02T .110440ill1:
1. The submitted site plans do not have a clear reference point that shows the orientation or locations
of the treatment units. Per 15A NCAC 02T .1104(a)(1), submit a site _ map for the _proposed_
tempo storage site that includes:
a. a scaled map of the site, with topographic contour intervals not exceeding 10 feet or 25 percent
of total site relief and showing all facility -related structures and fences within the treatment and
storage areas;
b. the location of each of the following that are located within 500 feet of a waste treatment, or
storage site, including a delineation of their review and compliance boundaries:
(i) wells, including usage and construction details if available;
(ii) ephemeral, intermittent, and perennial streams;
(iii) springs;
(iv) lakes;
(v) ponds; and
(vi) other surface drainage features;
c. setbacks as required by Rule .1108 of this Section; and
d. site property boundaries within 500 feet of all treatment and storage facilities.

Mr. Tim M. Little
July 12, 2019
Page 3 of 3
D. Enp-ineerine Plans 115A NCAC 02T .1104(a)(2)(A)I:
1. Per Application Instruction E and 15A NCAC 02T .1104(a)(2)(A), a North Carolina licensed
Professional Engineering shall sign, seal, and date the engineering plans. Please resubmit the
engineering plans accordingly.
2. Per Application Instruction E, amend the submitted engineering plans to include plan and profile
views of the three earthen basins detailing their dimensions and elevations, as well as their
associated piping, valves, and equipment.
E. Specifications 115A NCAC 02T .1104(a)(2)(B)I:
Per Application Instruction E and 15A NCAC 02T .1104(a)(2)(B), a North Carolina licensed
Professional Engineer shall sign, seal, and date the specifications. The specifications shall also
include a description of the materials to be used, methods of construction, and means for ensuring
quality and integrity of the finished product, including leakage testing. The specifications shall
also include an explanation as to how the existing erosion control settling ponds will be modified
into their proposed use.
F. Engineering Calculations 115A NCAC 02T .1104(a)(2)(C)1:
1. The engineering calculations use 25% of the total estimated Wet Slurry Volume and freeboard
requirement for stormwater to calculate the required capacity of storage for the basins, but no
calculation was provided to determine if this would be adequate. Please provide a water balance
that justifies the size of the basins. Please note that the Division of Water Resources requires that
open -atmosphere basins have at least two feet of freeboard.
G. Wastewater Reuse 115A NCAC 02U1:
Section III of the Diamond Grinding Slurry Management Plan, Appendix 1, and the Summary on
page 3 of Appendix 2 all indicate that the last pond in the system will be used as a reservoir for
clean water that would be collected for reuse in mechanical diffusion and in grinding operations. If
wastewater is to be reused in a beneficial reuse operation, the treatment system and effluent shall
meet the requirements of 15A NCAC 02U. The requirements include mandatory tertiary treatment,
effluent standards requirements listed in 15A NCAC 02U .0300, and the design standards listed in
15A NCAC 02U .0400. If beneficial reuse is considered, an application meeting the requirements
of 15A NCAC 02U is required. If beneficial reuse is not considered, the Diamond Grinding Slurry
Management Plan, Appendix 1, and Appendix 2 shall be amended to remove the reuse option, and
a new method for disposal of the supernatant wastewater shall be added.
H. Residuals Mana ement 115ANCAC 02T .1109 a 1 :
It is mentioned in Section I1 and Section IV of Diamond Grinding Slurry Management Plan and
Appendix 1 of the application that the resulting dry cake from the basins will be incorporated as a
beneficial fill in restoring the unlined basins to natural ground and establishing slopes for the
roadway. However, this activity would constitute a Surface Disposal Unit (SDU) permit, rather
than a Distribution of Class A Residuals permit. Condition III.6. of the current permit dated March
1, 2019 does not permit the use of this Class A residuals as a fill because using in such a manner
would exceed agronomic rates and could cause nuisance conditions or contravention of
groundwater standards. Dry cake residuals from the basins shall either be applied in accordance
with the current permit, landfilled, or an SDU permit shall be obtained from the Division. Please
make any applicable changes to the application forms based on how the solids will be handled.