NC0074900_Authorization to Construct_19971124

'State of North Carolina
Department of Environment,
Health and Natural Resources • •
Division of Water Quality
James B. Hunt, Jr., Governor
Wayne McDevitt Secretary ® E= N
A. Preston Howard, Jr., P.E., Director
November 24, 1997
Mr. T. Carroll Weber
Mid South Water Systems, Inc.
Post Office Box
Sherrills Ford, North Carolina 28673
Dear Mr, Weber:
Subject: Permit No. NC0074900
Authorization to Construct
Hwy 105 WWTP
Iredell County
A letter of request for an Authorization to Construct was received July 25, 1997 by the 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 a 0.10 MGD wastewater treatment facility consisting of a flow equalization chamber, dual 50,000 gpd trains each
consisting of an aeration basin and rectangular clarifier, aerated sludgeholding, a dual cell tertiary filter, post aeration, chlorination
and dechlorination with final discharge of treated wastewater into the Catawba River in the Catawba River Basin.
This Authorization to Construct is issued in accordance with Part III, Paragraph A of NPDES Permit No. NC0074900
issued December 9, 1996, and shall be subject to revocation unless the wastewater treatment facilities are constructed in accordance
with the conditions and limitations specified in Permit No. NC0074900.
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 North Carolina Division of Water Quality.
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 this Division, such as the construction of additional
or replacement wastewater treatment or disposal facilities.
The Mooresville Regional Office, telephone number [phone], shall be notified at least forty-eight (48) hours in
advance of operation of the installed facilities so that an in -place 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 approvedplans and specifications. Mail the Certification to the Permits and Engineering Unit,
P.O. Box 29535, Raleigh, NC 27626-0535.
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 Title 15A, Chapter 8A, .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. and must properly manage and
document daily operation and maintenance of the facility and must comply with all other conditions of Title 15A, Chapter 8A,
.0202. Once the facility is classified, the Permiuee must submit a letter to the Certification Commission which designates the
operator in responsible charge within thirty days after the wastewater treatment facilities are 50% complete.
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/ 10%post-consumer paper

Permit 'No. NCOO749OO
Authorization to Construct
Hwy 105 WWTP
November 24, 1997
Page 2
A copy of the approved plans and specifications shall be maintained on file by the Permittee for the life of the facility.
The Operational Agreement between the Permittee and the Environmental Management Commission is incorporated
herein by reference and is a condition of this Permit. Noncompliance with the terms of the Operational Agreement shall subject
the Permittee to all sanctions provided by G. S. 143-215.6 for violation of or failure to act in accordance with the terms and
conditions of this Permit.
Failure to abide by the requirements contained in this Authorization to Construct may subject the Permittee to an
enforcement action by the Division of Water Quality 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.
One (1) set of approved plans and specifications is being forwarded to you. If you have any questions or need additional
information, please contact Mr. Mark McIntire, telephone number [phone], extension 553.
Sincerely,
. Preston Howard, Jr., P.
cc: Central Files
NPDES Unit, Permit file
Mooresville Regional Office, Water Quality
Technical Assistance and Certification Unit
Land Design Engineering Services, Inc. / Dale Stewart, P.E.

• U
SOC PRIORITY PROJECT: No
To: Permits and Engineering Unit
Water Quality Section
Attention: Mark McIntire
Date: September 5, 1997
AUTHORIZATION TO CONSTRUCT
NPDES PERMIT
REPORT AND RECOMMENDATIONS
County: Iredell
MRO No. 97-55
Permit No. AC0074900
PART I - GENERAL INFORMATION
I. Facility and Address: NC 150 WWTP (formally Knotts Landing)
Mid -South Water Systems, Inc.
Post Ofice Box 127
Sherrills Ford, N.C. 28673
2. Date of On -Site Investigation (if conducted): July 17, 1996
3. Report Prepared By: Michael L. Parker, Environ. Engr. II
4. Persons Contacted and Telephone Number: Kim Colson, [phone].
5. Verified Discharge Point(s), List for All Discharge Points:
Latitude: 36' 36' 17" Longitude: 80' 56' 35"
Attach a USGS map extract and indicate treatment facility site and discharge
point on map.
USGS Quad No.: E 15 SW
6. Site size and expansion area consistent with application? Yes. There is more
than sufficient area available to construct the proposed WWTP.
7. Topography (relationship to flood plain included): The site is relatively flat (2-4%
slopes), and is not located in a flood plain. The site was once a rock quarry,
which has now been abandoned.
8. Location of NeardA DaniOUitg: None within±200' feet of the site (see part IV).

2
Page Four
Pending receipt and approval of the information requested above, it is
recommended that an ATC be issued.
Matc\atcMNC150.atc
Signature of Report Preparer Date

t
Page Two
PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
I. Existing Treatment Facility
a. Current permitted capacity: 0.041 MGD.
b. Date(s) and construction activities allowed by previous ATCs issued in the
previous two (2) years: NIA.
c. Actual treatment capacity of the current facility (design volume): NIA.
d. Description of existing or substantially constructed WWT facilities: There are
no existing WWT facilities.
2. Type of Proposed Treatment Facility: The applicant proposes to construct a
0.100 MGD Package -type WWTP consisting of two (2) 0.050 MGD parallel
WWTPs containing flow equalization, a bar screen followed by a flow splitter box,
aeration (diffused), secondary clarification, tertiary filters, post aeration,
disinfection, dechlorination, flow measurement, and an aerated sludge holding
tank.
3. Residuals Handling and Utilization/Disposal Scheme: Residuals will be removed
as needed and disposed of in the City of Newton WWTP.
4. Treatment Plant Classification: Class III (based on proposed treatment units)
5. SIC Code(s): 9999
Wastewater Code(s): 05,
Main Treatment Unit Code: 06107
6. . Important SOC/JOC or Compliance Schedule Dates: N/A
L06 1 ! -.'. �'.-j

Page Three
PART III - EVALUATION AND RECOMMENDATIONS
Mid -South Water Systems (MSWS) proposes to construct a 0.100 MGD
package -type extended aeration WWTP just off Highway 150 in Iredell County. The
NPDES Permit under which this WWTP is being constructed is currently listed as the
Knotts Landing WWTP, however, the Knotts Landing development will only occupy a
portion of the WWTP's capacity. For this reason, MSWS has chosen to rename the
facility the NC 150 WWTP since the proposed plant will serve a section of the NC Hwy.
150 corridor and the plant will also be located in close proximity to the highway.
One facility in particular that will be affected by the construction of this WWTP is
the existing Pier 16 Marina WWTP (NC0074535), currently operated by MSWS. This
facility, which is located very near the proposed point of discharge of the NC 150
WWTP, is at or near hydraulic capacity and has experienced some difficulty with Permit
compliance. Construction of the NC 150 WWTP will allow MSWS to eliminate the Pier
16 Marina WWTP.
The proposed WWTP site lies within an area that is experiencing considerable
residential development. The plant's access road (Spring Valley Road) is lined with
residential homes and more lots are planned now that sewer will be available. The site
plan for the WWTP, however, did not indicate what the development plans were for the
area immediately adjacent to the proposed plant site, although it is anticipated that the
residential growth along Spring Valley Road and along NC Hwy. 150 will continue. Such
being the case, the proposed 150' buffer between the proposed WWTP and adjacent
property lines (as shown on the site plan) may be insufficient without incorporating
additional measures that will minimize the creation of nuisance conditions (noise, odor,
etc.). Furthermore, this plant has the potential to become a "regional" WWTP
considering it's location in a rapidly developing area and the fact that the immediate
area is currently unsewered. Based on this information, it can be reasonably expected
that this facility will most likely grow beyond it's Phase I capacity. If this occurs,
nuisance problems for adjacent residents may increase as well. Therefore, it is
recommended that MSWS incorporate into their site plan the addition of some type of
buffering (earthen, vegetative, etc.) that will help minimize migrant odors and WWTP
operational noise. Receipt and Division approval of this buffer proposal is expected
prior to the approval of the ATC.