WQ0009772_More Information Requested_20131021

, A
I
MCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Resources
Water Quality Programs
Pat McCrory Thomas A. Reeder John E. Skvarla, III
Governor Director Secretary
October 21, 2013
MARTIN LASI'IUA — REGIONAL DIRECTOR
CAROLINA WATER SERVICE, INC. OF NC
POST OFFICE BOX 240908
CHARLOTTE, NORTH CAROLINA 28224-0908
Subject: Application No. WQ0009772
Additional Information Request
Monteray Shores WWTP
High -Rate Infiltration System
Currituck County
Dear Mr. Lashua:
Division of Water Resources' Central and Regional staff has completed their review of the application
package received September 3, 2013. However, additional information is required before the review may
be completed. Please address the items on the following pages no later than the close of business on
November 20, 2013.
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 shall
result in future requests for additional information.
Please reference the subject application number when providing the requested information. All revised
and/or additional documentation shall be signed, sealed and dated, -with three copies submitted to my
attention at the address below. Please note that failure to provide this additional information.on or before
the above requested date may result in your application being returned as incomplete.
If you have any questions regarding this request, please do not hesitate to contact me at [phone].
Thank. you for your cooperation.
Sincerely,
Nathaniel D. Thornburg
Environmental Engineer
cc: Randy Sipe — Washington Regional Office
Robert G. Burgin, Jr., PE — Burgin Engineering, hie.
Permit Application File WQ0009772
WATER QUALITY PERMITTING SECTION
1636 Mail Service Center, Raleigh, North Carolina 27699-1636
Location: 512 N. Salisbury St., Raleigh, NC 27604
Phone: [phone] \ FAX: [phone]
Internet: hftp://Portal.ncdenr.org/web/W
An Equal Opportunity \ Affirmative Action Employer

Mr. Martin Lashua
October 21, 2013
Page 2 of 5
Notes:
1. When providing an additional information response to the Division, please provide a letter addressing
each comment and provide a reference as to the location of the requested information in the updated
application package.
A. Cover Letter:
1. No comments.
B. Application Fee:
1. No comments.
C. Application:
1. Please note that the submitted application (Form: HRIS 12-06) is out of date. Accordingly,
please complete the most recent version of the application (Form: HRIS 08-13), or at a minimum,
complete Sections VI, IX and X of the application. This application can be downloaded at:
http://portal.ncdenr.or web/wq/aps/lau/applications.
2. Please clarify why the flow allocation information provided in Application Item, III.3. differs
from past flow allocation information provided for the Monteray Shores facility. For instance,
previous flow allocation calculations included 44,775 gallons per day (GPD) for future Corolla
Bay commercial expansion, but the information included with this application only cites 15,000
GPD for this purpose.
3. The setback in Application Item IV. 1. for the infiltration system to any habitable residence or
place' of assembly owned by the Permittee to be maintained as part of the project site is listed as
"See Revised Exhibit IV.2." The Division could not locate an Exhibit IV.2 in the application
package. Please amend Application Item IV.1. to include this minimum observed setback
distance.
4. The last part of Application Item IV.1. indicates that a setback is not met. Please clarify which
setback is not met.
The proposed modification includes the addition of new equipment to the wastewater treatment
plant. Therefore; please amend Application Item V.2. as necessary to include all new treatment
units and equipment, as well as their plan sheet and specification page references.
Application Item VII.7. and the existing permit issued November 9, 2012 state that the area of the
existing infiltration basin is 1.85 acres. However, both the Hydrogeologic Report and
Engineering Plans have differing areas of 2.23 and 2.22 acres, respectively. Amend Application
Item VH.7. to include the correct area.
D. Property Ownership Documentation:
1. No comments.

Mr. Martin Lashua
October 21, 2013
Page 3 of 5
E. Soil Evaluation:
1. No comments.
F. Agronomist Evaluation:
1. Not applicable.
G. Hydrogeologic Report:
1. See Section I— Engineering Plans Comments #1 and Q.
H. Water Balance:
1. Not applicable.
I. Engineering Plans:
Plan Sheet C-100 and the Hydrogeologic Report indicate that the high -rate infiltration basin is
approximately 2.22 acres in size, even though the current permit only authorized the construction
and operation of a 1.85 acre infiltration basin. Accordingly, the Division has no record that the
basin was not constructed to the permitted size, and was not aware of this change until this permit
application. Please explain why the Division was not notified of this substantial change in
acreage prior to this permit modification (e.g., Engineering Certification, start-up inspection,
permit modification, etc.) In addition, please provide documentation as to when and how it was
determined that the basin was actually larger than the original design.
The Hydrogeologic Report states that the groundwater lowering drain should capable of pumping
up to 275,850 GPD; however, the Division could not locate information on the drain in the
provided design drawings. Please provide documentation that the drain is capable of this flow,
and how flow from the drain will be regulated. Also, during Division inspections, it has been
noted that there have been some problems with the drain pumping sand and damaging the
groundwater pumps. Is this still a problem and, if so, how will it be addressed during this
modification?
3. Plan Sheet C-100 shows that the high -rate infiltration basin contains a dividing wall, thus
presumably allowing the Permittee to operate the system as two separate basins. If so, please
provide the area of each basin.
4. Application Item IV.2. states that the 5-day upset pond will be fenced to prevent public access.
However, Plan Sheet C-101 does not appear to show fencing around the proposed 5-day upset
pond. Please amend the plan set to include fencing, as well as provide a detail of the proposed
fencing.

Mr. Martin Lashua
October 21, 2013
Page 4 of 5
J. Specifications:
1. Since the submitted specifications will be stamped approved upon permit issuance as a standalone
document, please provide a cover sheet to the specifications that has been signed, sealed and
dated by a licensed North Carolina Professional Engineer.
2. Per Application Instruction J, please amend the specifications to include a table of contents with
references to each section.
K. Engineering Calculations:
1. A large portion of the Engineering Calculations appears to be previously submitted calculations
from an October 2010 application to Permit No. WQ0035060 for Outer Banks Ventures WWTP
#1. Accordingly, please submit revised calculations that are for the Monteray Shores facility, and
that are for the proposed flow of 5 80,3 20 GPD.
2. Amend the submitted Engineering Calculations to include calculations demonstrating the area of
the high -rate infiltration basin(s) at the two foot freeboard elevation.
L. Site Map:
1. No comments.
M. Power Reliability Plan:
1. No comments.
N. Operation and Maintenance Plan:
1. Amend existing Operation and Maintenance Plan to include information about the proposed 5-
day pond, as well as the new MBR units/layout.
2. For at least the last three years wetland vegetation has been observed growing in the basin during
inspections. Because flows have been relatively low, the presence of the vegetation has not
impacted the basin's operation; however, if the basin is to be permitted for the proposed
additional flow, the Permittee should provide a description of what operation and maintenance
methods will be used to remove the vegetation and maintain the basin in the future so it can
assimilate the additional flow.
O. Residuals Management Plan:
1. Amend the Residuals Management Plan to provide calculations demonstrating that sufficient
residual storage is provided based on the increased flow.

Mr. Martin Lashua
October 21, 2013
Page 5 of 5
P. Additional Documentation:
➢ Certificate of Public Convenience and Necessity:
1. In accordance with 15A NCAC 02T .0704(g), please provide documentation from the North
Carolina Utilities Commission documenting that the Permittee has either been approved or has
applied for approval to provide utility service to the areas proposed to be included in this
permit modification.
➢ Existing Permit:
1. No comments.
➢ Final Environmental Document:
1. Not applicable.
➢ Floodway Regulation Compliance:
1. Not applicable.
➢ Operational Agreements:
1. Not applicable.
➢ Threatened or Endangered Aquatic Species Documentation:
1. Per Application Instruction P and 15A NCAC 02T .0105(c)(10), provide documentation
concerning the presence or absence of threatened or endangered aquatic species in the area of
the proposed facility modification.
➢ Wastewater Chemical Analysis:
1. Not applicable.