NC0060461_Authorization to Construct_20141103

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Carolina Water Services, Inc. of NC
Abington Subdivision WWTP
Authorization to Construct No. 060461 AO
Issued May 9, 2014
Engineer's Certification
1, William G. Langley , as a duly registered Professional Engineer in
the State of North Carolina, having been authorized to observe (periodically/weekly/full time)
the construction of the modifications and improvements to the Abington Subdivision Wastewater
Treatment Plant, located in Forsyth County, hereby state that, to the best of my abilities, due care
and diligence was used in the observation of the following construction:
Installation of a new liquid chlorination system consisting of two (2) 24 GPD
chemical feed pumps in an induced suction arrangement from a 55 gallon tank of
sodium hypochlorite solution to a drip feed connection to the inlet side of the
existing chlorine contact basin, including piping, containment, and controls;
installation of a new liquid dechlorination system consisting of two (2) 24 GPD
chemical feed pumps in an induced suction arrangement from a 55 gallon tank of
sodium bisulfite solution to a drip feed connection to the existing chlorine contact
basin discharge trough, including piping, containment, and controls; in conformity
with the project plans, specifications, and other supporting data subsequently filed
and approved by the Department of Environment and Natural Resources.
Note the existing tablet chlorination and dechlorination systems are to remain as
back up.
I certify that the construction of the above referenced project was observed to be built within
substantial compliance, intent and in conformity with all applicable regulations and statutes and
the project plans, specifications, and other supporting documentation comprising the
Authorization to Construct Permit Application package.
Signature WA&,am G L a,1194 Registration No.
Date 11/03/2014
Mail this Certification to: Attn: Ron Berry
Complex Permitting Unit
DENR/DWR/Water Quality Programs
1617 Mail Service Center
Raleigh, NC 27699-1617
14384
CAR0�
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No. 14,384
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iNCDENR
North Carolina Department of Environment and Natural Resources
Pat McCrory
Governor
Martin Lashua
Vice President of Operations
Carolina Water Services, Inc. of NC
P. O. Box 240908
Charlotte, North Carolina 28224
Dear Mr. Lashua:
John E. Skvarla, III
Secretary
May 9, 2014
SUBJECT: 'Authorization to Construct
A to C No. 06046IA01
Carolina Water Services, Inc. of NC
Abington Subdivision WWTP
A letter of request for an Authorization to Construct was received April 29, 2014, by the
Division of Water Resources (Division), and final plans and specifications for the subject project have
been reviewed and found to be satisfactory. Authorization is hereby granted for the construction of
modifications to the existing 0.2 MGD Abington Subdivision WWTP, with discharge of treated
wastewater into the Belews Creels in the Roanoke River Basin.
This authorization results in no increase in design or permitted capacity and is awarded for the
construction of the following specific modifications:
Installation of a new liquid chlorination system consisting of two (2) 24 GPD chemical feed
pumps in an induced suction arrangement from a 55 gallon tank of sodium hypochlorite
solution to a drip feed connection to the inlet side of the existing chlorine contact basin,
including piping, containment, and controls; installation of a new liquid dechlorination system
consisting of two (2) 24 GPD chemical feed pumps in an induced suction arrangement from a
55 gallon tank of sodium bisulfite solution to a drip feed connection to the existing chlorine
contact basin discharge trough, including piping, containment, and controls; in conformity
with the project plans, specifications, and other supporting data subsequently filed and
approved by the Department of Environment and Natural Resources.
Note the existing tablet chlorination and dechlorination systems are to remain as back up. The
Permittee is expected to maintain sufficient inventory, or access to inventory, beyond what is
require to meet maximum treatment demand based on worst case delivery of liquid solutions,
and operational monitoring to sustain continuous chlorination and dechlorination treatment.
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
Phone: [phone] Internet: www.ncwaterquality.org
An Equal Opportunity\Affirmative Action Employer

Martin Lashua, Vice President of Operations
May 9, 2014
Page 2 of 3
This Authorization to Construct is issued in accordance with Part III, Paragraph A of NPDES
Permit No. NCO060461 issued May 1. 2012, and shall be subject to revocation unless the wastewater
treatment facilities are constructed in accordance with the conditions and limitations specified in
Permit No. NC0060461.
The sludge generated from these treatment facilities must be disposed of in accordance with
G.S. 143-215.1 and in a manner approved by the Division.
In the event that the facilities fail to perform satisfactorily, including the creation of nuisance
conditions, the Permittee shall take immediate corrective action, including those as may be required by
the Division, such as the construction of additional or replacement wastewater treatment or disposal
facilities.
The Winston-Salem Regional Office, telephone number (336) 771 - 5000, shall be notified at
least forty-eight (48) hours in advance of operation of the installed facilities so that an on site
inspection can be made. Such notification to the regional supervisor shall be made during the normal
office hours from 8:00 a.m. until 5:00 p.m. on Monday through Friday, excluding State Holidays.
Upon completion of construction and prior to operation of this permitted facility, a certification
must be received from a professional engineer certifying that the permitted facility has been installed
in accordance with the NPDES Permit, this Authorization to Construct and the approved plans and
specifications. Mail the Certification to: NPDES Unit, DWR/DENR, 1617 Mail Service Center,
Raleigh, NC 27699-1617. '
Upon classification of the facility by the Certification Commission, the Permittee shall employ
a certified wastewater treatment plant operator to be in responsible charge (ORC) of the wastewater
treatment facilities. The operator must hold a certificate of the type and grade at least equivalent to or
greater than the classification assigned to the wastewater treatment facilities by the Certification
Commission.
The Permittee must also employ a certified back-up operator of the appropriate type and grade
to .comply with the conditions of T15A:8G.0202. The ORC of the facility must visit each Class I
facility at least weekly and each Class II, III and IV facility at least daily, excluding weekends and
holidays, must properly manage the facility, must document daily operation and maintenance of the
facility, and must comply with all other conditions of T15A:8G.0202.
A copy of the approved plans and specifications shall be maintained on file by the Permittee for
the life of the facility.
During the construction of the proposed additions/modifications, the permittee shall continue to
properly maintain and operate the existing wastewater treatment facilities at all times, and in such a
manner, as necessary to comply with the effluent limits specified in the NPDES Permit.
Z

Martin Lashua, Vice President of Operations
r May 9, 2014
Page 3 of 3
You are reminded that it is mandatory for the project to be constructed in accordance with the
North Carolina Sedimentation Pollution Control Act, and when applicable, the North Carolina Dam
Safety Act. In addition, the specifications must clearly state what the contractor's responsibilities shall
be in complying with these Acts.
Prior to entering into any contract(s) for construction, the recipient must have obtained all
applicable permits from the State.
Failure to abide by the requirements contained in this Authorization to Construct may subject
the Permittee to an enforcement action by the Division in accordance with North Carolina General
Statute 143-215.6A to 143-215.6C.
The issuance of this Authorization to Construct does not preclude the Permittee from
complying with any and all statutes, rules, regulations, or ordinances which may be imposed by other
government agencies (local, state, and federal) which have jurisdiction.
If you have any questions or need additional information, please contact Ron Berry at
telephone number [phone].
Sincerely,
Thomas A. eeder, Director
Division of Water Resources/NCDENR
cc: William Langley, P.E.
Henson Foley
16740 Birkdale Commons Pkwy
Suite 200
Huntersville, NC 28078
DWR/Winston-Salem Regional Office, Water Quality Programs
Central Files
NPDES File
Without Engineer's Certificate attached:
Forsyth County Health Department

CHLORINE CHAMBER/POST AERATION CHAMBER
CHLORINE CHAMBER
A separate chlorine chamber with a capacity of 4,167
gallons shall be supplied to provide a point of injecting
chlorine into the effluent and allow proper mixing. The chamber
volume is based on 30 . minutes retention of the average daily
flow rate. ze& �j ��� dv� h
The chlorine chamber shall be a detached part of the waste-
water treatment plant. The chamber shall be conntructed of one -
quarter inch structural steel plate and be rectangular in shape
as shown on the plans. There shall be sufficient flow baffles
installed to assure proper mixing of the chlorine solution with
wastewater plant effluent.
There shall be supplied within the chlorine chamber a _90•_
degree V-notch weir box mounted at the outlet end of the chamber.
A stilling well with flowmeter mounting stand shall be included
for installation of a f lowmeter .
POST AERATION
To provide for aeration of the effluent from the wastewater
treatment plant prior to discharge, there shall be supplied as an,
integral part of the chlorine contact chamber a 2,000 gallon
posy_ aeration chamber. The chamber shall be completely separate
from the chlorine contact chamber as shown on the plans. The
chamber shall be constructed the same as the chlorine contact
chamber.
There shall be installed in the chamber a diffuser drop com-
plete with diffusers so as to cause miniscule air diffusion
bubbles through to , the surface., thereby providing maximum
oxygenation efficiency. The diffuser drop will be equipped with
a union to allow easy removal from the tank_ There shall also be
provided between the union and the airheader a valve for regulat-
ing the air supplied to the chamber or for complete shut off when
required. The diffusers shall be the same as described in the
specifications for the wastewater treatment plant.

Abington WWTP NC#0060461
as
Blowers Aeration Basin #1 100,000
Aeration Basin #2 100,000
Sludge
Box
screen EQ Basin 50,
L/S j
Digester 50,000
Office
Digester Shed
M Y� . . ..... . -
GREY Line fence
RED Line Flow
BLUE Line Air
IMPM
rifler #1
19
rifier #2
mber