NC0003719_Authorization to construct_19950526

State of North Carolina
Department of Environment,
Health and Natural Resources
Division of Environmental Management
James B. Hunt, Jr., Governor
Jonathan B. Howes, Secretary
A. Preston Howard, Jr., P.E., Director
May 26, 1995
Mr. H. Van Bell
Monsanto
P.O. Box 2307
Fayetteville, North Carolina 28302
Subject: Permit No. NC0003719
Amended Authorization to Construct
Monsanto
Wastewater Treatment Facility
Cumberland County
Dear Mr. Bell:
This correspondence is to amend the Authorization to Construct that was issued to your facility on
May 17, 1995. Final plans and specifications for the subject project were found to be satisfactory with the
exception of two items which include: (1) mixing in the proposed flow equalization tank is hereby
required, and (2) written justification must be provided for not maintaining the abandoned 50 ft. clarifier
in standby condition as required under the duality provisions in NCAC T15A: 02H. 0124. These two
items must be addressed in writing prior to construction and shall include the submittal of plans and
specifications for the flow equalization tank and mixer. Written justification for the abandonment of the 50
ft. clarifier shall include a showing that solids will not be an issue and that sufficient hydraulic capacity is
available in the on-line 90 ft. clarifier.
Authorization is hereby granted for the construction of improvements to the existing WWTP to
include:
(1) Conversion of the existing 3.5 MGD equalization basin to an aeration basin of equal size,
(2) Installation of a new six inch Parshall flume,
(3) Conversion of the existing 0.3 MGD aeration basin into a 0.3 MGD sludge digester, and
(4) Relocation of existing aerators and installation of new aerators.
Authorization to construct flow equalization improvements to the existing WWTP shall be provided
under separate cover after submitted plans and specifications for the chosen flow equalization option have
been reviewed. Current flow equalization options are limited to:
(1) Flow equalization with mixing to be provided by conversion of an existing 1.5 MG fuel
storage tank or construction of a new 1.2 MG carbon steel equalization tank.
The fmal system shall consist of flow equalization with mixing, pH adjustment, oil skimming, dual
aeration basins, clarifier, effluent flow measurement, sludge pump station, dual aerobic digesters, aerated
sludge holding basin, and sludge drying beds with discharge of 0.859 MGD of treated wastewater into the
Cape Fear River.
This Authorization to Construct is issued in accordance with Part III, Paragraph A of NPDES
Permit No. NC0003719 issued March 7, 1994 and shall be subject to revocation unless the wastewater
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. NC0003719
Authorization to Construct
Monsanto
May 26, 1995
Page 2
treatment facilities are constructed in accordance with the conditions and limitations specified in Permit No.
NC0003719.
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 Environmental Management.
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 Fayetteville 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 approved plans 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 Permittee 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.
A copy of the approved plans and specifications shall be maintained on file by the Permittee for the
life of the facility.
Failure to abide by the requirements contained in this Authorization to Construct may subject the
Permittee to an enforcement action by the Division of Environmental Management 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.

Permit No. NC0003719
Authorization to Construct
Monsanto
May 26, 1995
Page 3
One (1) set of approved plans and specifications is being forwarded to you. If you have any
questions or need additional information, please contact Jeanette Powell at telephone number (919) 733-
5083, extension 537.
Sincerely,
. Preston fu ward, Jr., P.E.
cc: Cumberland County Health Department
Fayetteville Regional Office, Water Quality
Training and Certification Unit
Facilities Assessment Unit