WQ0004661_Final Permit_19910430

State of North Carolina
Department of Environment, Health and Natural Resources
Division of Environmental Management
512 North Salisbury Street • Raleigh, North Carolina 27626-0535
James G. Martin, Governor
William W. Cobey, Jr., Secretary
Dr. Robert Wentz, Superintendent
Wake County Public School System
3600 Old Wake Forest Road
Raleigh, North Carolina 27611
Dear Dr. Wentz:
George T. Everett,Ph.D.
Director
April 30, 1991
Subject: Permit No. WQ0004660
Wake County Public School System
Pleasant Union Elementary School
Subsurface Disposal System
Wake County
In accordance with your application received January 28, 1991, we are forwarding
herewith Permit No. WQ0004660, dated April 30, 1991, to the Wake County Public School
System for the construction and operation of a 5700 GPD low pressure pipe subsurface
wastewater disposal system.
This permit shall be effective from the date of issuance until March 31, 1996, and shall be
subject to the conditions and limitations as specified therein. Please pay particular attention to the
monitoring requirements in this permit. Failure to establish an adequate system for collecting and
maintaining the required operational information will result in future compliance problems.
If any parts, requirements, or limitations contained in this permit are unacceptable to you,
you have the right to request an adjudicatory hearing upon written request within 30 days
following receipt of this permit. This request must be in the form of a written petition,
conforming to Chapter 150B of North Carolina General Statutes, and filed with the Office of
Administrative Hearings, P.O. Drawer 27447, Raleigh, NC 27611-7447. Unless such demands
are made this permit shall be final and binding.
One set of approved plans and
additional information concerning this n
cc: Wake County Health Department
Wake County Department of Env
Raleigh Regional Office
Groundwater Section
Training and Certification Unit
Barrett Kays & Associates, P.A.
is being forwarded to you. If you need
tact Mark Hawes at 919/ 733-5083,
Health
T.
Pollution Prevention Pays
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone]
An Equal Opportunity Affirmative Action Employer

NORTH CAROLINA
ENVIRONMENTAL MANAGEMENT COMMISSION
DEPARTMENT OF ENVIRONMENT, HEALTH AND NATURAL RESOURCES
RALEIGH
SUBSURFACE DISPOSAL SYSTEM PERMIT
In accordance with the provisions of Article 21 of Chapter 143, General Statutes of North
Carolina as amended, and other applicable Laws, Rules, and Regulations
PERMISSION IS HEREBY GRANTED TO
Wake County Public School System
Wake County
WIN M_.I_
construction and operation of a 5700 GPD subsurface wastewater disposal system consisting of
an 8,000 gallon septic tank, a 16,500 gallon dosing tank with dual 48 hp pumps and high water
alarms, five (5) 9,600 sf disposal fields, a programmable controller for sequential dosing and all
the associated piping, valves, and appurtenances to serve Pleasant Union Elementary School with
no discharge of wastes to the surface waters, pursuant to the application received January 28,
1991 and in conformity with the project plan, specifications, and other supporting data
subsequently filed and approved by the Department of Environment, Health and Natural
Resources and considered a part of this permit.
This permit shall be effective from the date of issuance until March 31, 1996, and shall be
subject to the following specified conditions and limitations:
I. PERFORMANCE STANDARDS
1. 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 this permit, the approved
plans and specifications. Mail the Certification to the Permits and Engineering
Unit, P.O. Box 29535, Raleigh, NC 27626-0535,
2. The Raleigh Regional Office, phone no. [phone], shall be notified at least
forty-eight (48) hours in advance of backfilling 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.
3. In the event that the facilities fail to perform satisfactorily, including the creation of
nuisance conditions, the Pe-nnittee shall take immediate corrective action, including
those as may be required by this Division, such as construction of additional or
replacement wastewater treatment or disposal facilities.
4. The issuance of this permit shall not relieve the Permittee of the responsibility for
damages to surface or groundwaters resulting from the operation of this facility.

5. This permit shall become voidable if the soils fail to adequately absorb the wastes
and may be rescinded unless the facilities are installed, maintained, and operated in
a manner which will protect the assigned water quality standards of the surface
waters and ground waters.
6. Adequate measures shall be taken to divert stormwater from the disposal area and
prevent wastewater runoff from the subsurface disposal field.
7. The sludge generated from these treatment facilities must be disposed of in
accordance with General Statute 143-215.1 and in a manner approved by the North
Carolina Division of Environmental Management.
8. A usable reserve area shall be maintained for wastewater disposal. The reserve area
shall have the capability of accommodating the average daily flow of the facility
being served without exceeding the loading rates of the reserve area while meeting
all required buffer requirements.
9. , Diversion or bypassing of the untreated wastewater from the treatment facilities is
prohibited.
10. The following buffers shall be maintained:
a) 100 feet between disposal area and any public or private water supply including
wells
b) 100 feet between disposal area and "SA and SB" classified surface waters
c) 50 feet between disposal area and any stream, lake, river or natural drainageway
d) 50 feet between disposal area and property lines
e) 10 feet between disposal area and surface water interceptor drains or diversions
(upslope)
f) 25 feet between disposal area and surface water interceptor drains or diversions
(downslope) and groundwater drainage systems.
11. A leakage test shall be performed on the septic tank and dosing tank to insure that
any exfiltration occurs at a rate which does not exceed twenty (20) gallons per
twenty-four (24) hour per 1,000 gallons of tank capacity. The engineer's
certification will serve as proof of compliance with this condition.
11. OPERATION AND MAINTENANCE REQUIREMENTS
1. The facilities shall be properly maintained and operated at all times.
2. Upon classification of the facility by the Certification Commission, the Permittee
shall employ a certified waster treatment plant operator to be in responsible charge
of the wastewater treatment facilities. The operator must hold a certificate of the
type and grade at least equivalent to the classification assigned to the wastewater
treatment facilities by the Certification Commission. Once the facility is classified.,
the Pemiittee 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.
3. The application rates to the disposal field shall not exceed 0.12 gpd{sf.
4. The facilities shall be effectively maintained and operated as a non -discharge system
to prevent the discharge of any wastewater resulting from the operation of this
facility.

S. No traffic or equipment shall be allowed on the disposal area except while
installation occurs or while normal maintenance is being performed.
6. A suitable cover shall be maintained on the LPP field(s) and the field(s) shall be
kept mowed. The clippings shall be removed to prevent the build up of thatch.
7. The low pressure lines shall be purged monthly using potable water or air pressure
and the pressure adjusted on the distribution lines to approved specifications.
III. MONITORII� AND REPORTING REnUIREMENTS
1. Any monitoring deemed necessary by the Division of Environmental Management
to insure surface and ground water protection will be established and an acceptable
sampling reporting schedule shall be followed.
2. . Adequate records showing all maintenance shall be maintained by the Permittee.
These records should include but are not limited to the following:
Items Inspection Frequency
a) Individual dosing pump operation Weekly
b) Individual field rotation Weekly
c) High water alarms Weekly
d) Residual pressure on highest and
lowest lateral on each subfield Monthly
e) Residual pressure on all laterals Semi-annually
3. Three copies of all operation and maintenance records (as specified in condition III
2) and all effluent monitoring data (as specified in condition III 3) shall be
submitted on or before January 31 of the following year to the following address:
NC Division of Environmental Management
Water Quality Section
Facility Assessment Unit
PO Box 29535
Raleigh, NC 27626-0535
4. A record shall be maintained of all residuals removed from this facility. This record
shall include the name of the hauler, permit authorizing the disposal or a letter from
a municipality agreeing to accept the residuals, date the residuals were hauled, and
volume. of residuals removed.
7. Noncompliance Notification:
The Permittee shall report by telephone to the Raleigh Regional Office, telephone
no. [phone], as soon as possible, but in no case more than 24 hours or on
the next working day following the occurrence or first knowledge of the occurrence
of any of the following:
a. Any occurrence at the wastewater treatment facility which results in the
treatment of significant amounts of wastes which are abnormal in quantity
or characteristic, such as the dumping of the contents of a basin or tank; the
known passage of a slug of hazardous substance through the facility; or any
other unusual circumstances.
3

b. Any process unit failure, due to known or unknown reasons, that render the
facility incapable of adequate wastewater treatment such as mechanical or
electrical failures of pumps, aerators, compressors, etc.
C. Any failure of a pumping station, sewer line, or treatment facility resulting
in a by-pass of all or any portion of the influent to such station or facility.
d. Any time that self -monitoring information indicates that the facility has gone
out of compliance with its permit limitations.
Persons reporting such occurrences by telephone shall also file a written report in
letter form within 15 days following first knowledge of the occurrence. This report
must outline the actions taken or proposed to be taken to ensure that the problem
does not recur.
I V . GRQUNDWATER REQUIREMENTS
Any groundwater quality monitoring as deemed necessary by the Division of
Environmental Management shall be provided.
V . INSPECTI,QNS
1. Adequate inspection, maintenance, and cleaning shall be provided by the Permittee
to insure proper operation of the subject facilities.
2. The Permittee or his designee shall inspect the wastewater treatment and disposal
facilities to prevent malfunctions and deterioration, operator errors and discharges
which may cause or lead to the release of wastes to the environment, a threat to
human health, or a nuisance. The Permittee shall keep an inspection log or
summary including at least the date and time of inspection, observations made, and
any maintenance, repairs, or corrective actions taken by the Permittee. This log of
inspections shall be maintained by the Permittee for a period of three years from the
date of the inspection and shall be made available upon request to the Division of
Environmental Management or other permitting authority.
Any duly authorized officer, employee, or representative of the Division of
Environmental Management may, upon presentation of credentials, enter and
inspect any property, premises or place on or related to the disposal site and facility
at any reasonable time for the purpose of determining compliance with this permit;
may inspect or copy any records that must be kept under the terms and conditions
of this permit; or may obtain samples of groundwater, surface water, or leachate.
VI. GENERAL CONDITIQNS
1. This permit shall become voidable unless the facilities are constructed in accordance
with the conditions of this permit, the approved plans, specifications and other
supporting data.
2. This permit is effective only with respect to the nature and volume of wastes
described in the application and other supporting data.
S

3. This permit is not transferable. In the event there is desire for the facilities to
change ownership, or there is a name change of the Permittee, a formal permit
request must be submitted to the Division of Environmental Management
accompanied by an application fee, documentation from the parties involved, and
other supporting materials as may be appropriate. The approval of this request will
be considered on its merits and may or may not be approved.
4. Prior to any transfer of this land, a notice shall be given to the new owner that gives
full details of the materials applied or incorporated at this site.
5. A set of approved plans and specifications for the subject project must be retained
by the applicant for the life of the project.
6. The annual administering and compliance fee must be paid by the Permittee within
thirty (30) days after being billed by the Division. Failure to pay the fee
accordingly may cause the Division to initiate action to revoke this permit as
specified by 15 NCAC 2H .0205 (c)(4).
7. Failure to abide by the conditions and limitations contained in this permit may
subject the Permittee to an enforcement action by the Division of Environmental
Management in accordance with North Carolina General Statute 143-215.6.
$1 The wastewater treatment facility shall connect to a publicly owned areawide
sewage collection system within 180 days of its availability. All discharge of
wastewater to the system shall cease at the time of the connection to the sewerage
collection system.
9. The issuance of this permit 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.
10. The Permittee, at least six (6) months prior to the expiration of this permit, shall
request its extension. Upon receipt of the request, the Commission will review the
adequacy of the facilities described therein, and if warranted, will extend the permit
for such period of time and under such conditions and limitations as it may deem
appropriate.
11. The Permittee shall install water conservation fixtures to assure an average daily
flow of no greater than 5700 gpd.
Permit issued this the 30th day of April, 1991
/-1QR7'H CAROLIN ENVIRONMENTAL MANAGEMENT COMMISSION
N
George T. Eveeft Duct \,
Division of E onrrae tal anagement
By Authority o mental Management Commission
hermit No. WQ0004660
5

Permit No. WQ0004660
April 30, 1991
En dneer's Certification
1, , 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
project, , for the
Project Name Location
Permittee hereby state that, to the best of my abilities, due care and diligence was used in the
observation of the construction such that the construction was observed to be built within
substantial compliance and intent of the approved plans and specifications.
Signature Registration No.
Date

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tlAj O,t2_

(4)
(5)
(6)
ITEM
POINTS
(h}
Preaeration or Equal+zation . . . . . . . .
l
(iJ
Grease or Oil Separators -- Gravity . . .
2
Mechanical. . .
3
Aerated . .
5
(j)
Chemical Conditioning . . . . . . . . . . .
5
PRIMARY TREATMENT UNITS
Septic Tank (see definition No. 44) .
b
Ja
Imhoff Tank . . . . . . . . . . . . .
3
c
Primary Clarifiers (including sludge air lifts) . .
5
d
Settling Ponds or Settling Tanks for Inorganic Non -
Toxic Materials Involving a Discharge to the Surface
waters (sand, gravel, stone, and other mining operations
except recreational activities such as gem or gold
mi ni ng) . . . . . . . . . . . . . . . . . . . . ..
to
SECONDARY TREATMENT UNITS
(a)
Carbonaceous Stage
(i) Aeration - High Purity Oxygen System . . . .
20
Diffused Air System . . . ,
10
Mechanical Air System (fixed, floating or rotor)
8
Separate Sludge Reaeration . . . , . . . .
3
(ii) Trickling Filter - High Rate . . . . .
7
Standard Rate . . . . . .
5
Packed Tower . . . . . . .
5
(III) Aerated Lagoons . . . . . . . . . . . . . .
10
(iv) Rotating Biological Contactors (biodisc). . .
10
(v) Sand Filters (intermittent biological) , , .
2
(vi Stabilization Lagoons with Outlet to Stream ,
5
(vii Clarifier (including sludge air lifts). . . .
5
(b)
Nitrogenous Stage
(i) Aeration - High Purity Oxygen System. . . . .
20 ,r
Diffused Air Systems. . . . . . . . . .
10
Mechanical Air System (fixed, floating, or rotor)8
Separate Sludge Reaeration . . . . . . . . .
3
(11) Trickling Filter - High Rate . ,
7
Standard Rate . , . . . ,
5
Packed Tower. . .
5
(iii) Rotating Biological Contactors (biodisc) . ,
]0
(iv} Sand Filter (intermittent biological). . . .
2
(v)))) Clarifier (including sludge air lifts) . . .
5
TERTIARY
OR ADVANCED TREATMENT UNITS
(a)
Activated Carbon Beds - Without Carbon regeneration
5
With Carbon regeneration.
15
(b)
Powdered or Granular Activated Carbon Feed - Without
Carbon regeneration
5
With Carbon regeneration,
15
(c)
Ammonia Stripping .
18
d
Chemical Additions . . . . • . . 1
5
(e)
Denitrification Process (separate process),
10
(f)
Electrodialysis . . . . . . . . . . . . . .
5
(g)
Foam Separation . . . . . . . . . . . . . . .
5
(h)
Ion Exchange. . . . . . . . . . . . . . . . .
5
-z-
ITEM
POINTS
(i)
Land Application (see definition No. 23b)
, 5
(not applicable for facilities under IG(a) .
j}
Nicroscreens . . . . . . . . . . . . . . ... . . .
5
k)
Phosphorus Removal . . . . . . . . . . . . . . . .
20
((((((1)
Polishing Ponds- Without aeration
2
With aeration . . . . . . . .
5
(m)
Post Aeration - Cascade .. .
0
Diffused or Mechanical . . . . .
5
{n)
Pre -Package Unit for Removal of Oil and Grease .
30
o)
Reverse Osmosis
5
(p)
Sand or Mixed -Media Filters -- Low Rate . . . . . .
2
High Rate . . . ..
5
(7)
SLUDGE TREATMENT
(a)
Sludge Digestion Tank -- Heated . . . . . . . . . .
10
Aerobic . . . . . . . . .
5
Unheated . . . . , . ,
3
b)
Sludge Stabilization (chemical or thermal) . .
10
c)
Sludge Drying Beds . . . . . . . . . . . . . . . .
2
d)
Sludge Elutriation . . . . .
5
e)
Sludge Conditioner (chemical or thermal) . . . . .
5
f)
Sludge Thickener . . . . . , .
2
�g
Sludge Gas Utilization (including gas storage). . .
2
h;
Sludge Holding Tank -- Aerated . . . . . . . . . .
5
Non -aerated . . . . .
2
(i)
Sludge Incinerator (not inc7udiactivated carbon
regeneration . . . . .
to
(j)
Vacuum Filter, Centrifuge or Filter Press
10
(8)
SLUDGE DISPOSAL (including incinerated ash)
(a)
Lagoons . . . . . . . . . . . . . , .
2
b)
Land Application (surface and subsurface) (see def.
23a ) . . . . . . . . . . . . .
10
(c)
Landfilled (burial) . . , . . . . . . .
5
(9)
DISINFECTION
a
Pre
1
b
Intermediate . . . . . . . . . . . . . . . . . .
2
Post . . . . . . . . . . . . . . . . . . . . . .
3
�c)
d)
Dechlorination. . . . . . . . . . . . . . . , .
5
e)
Chlorine or Ozone Generation
5
(f)
Radiation . . . . . . . . . . . . . . .
3
(10)
MISCELLANEOUS UNITS
(a)
Holding Ponds or Holding Tanks for inorganic, Non -toxic
Materials with no Discharge to the Surface Waters
2
(Sludge handling facilities for water purification
plants, sand, gravel, crushed stone and other similar
operations --see definition No. 10)
(b)
Holding Ponds or Holding Tanks for Organic or Toxic
Materials with no Discharge to the surface Waters
4
(Any pump, valve, or other mechanical control subject
to failure creating a potential for bypass or discharge
from the holding ponds or tanks will necessitate a
minimum classification of Class 1 requiring a certified
operator).
-3-

(MISCELLANEOUS UNITS CONTINUED) POINTS
(c) Holding Pond for Effluent Flow Equalization and/or
Stage Discharge
(d) Effluent Pumps . . . . . . . . . . . .3
(e) In -Plant Pumps (including air lifts). . . . . .
�f) Stand -By Power Supply . . . . . . . . . . . . . . 3
g) Thermal Pollution Control Device
(h) Treatment Processes for Removal of Metal or Cyanide and
other Toxic Materials . . . . . . . . . . . . . . . 30
Total Points t 3
CLASSIFICATION
Class 1 . . . . . . . . . . . . . . . 5 - 25 Points
Class I1 . . . . . . . . . . . . . . . 26 - 50 Points
Class III . . . . . . . . . . . . . . . 51 - 65 Points
Class IV . . . . . . . . . . . . . . . 66 - Up Points
Facilities having a rating of one through four points, inclusive,
do not require a certified operator. Classification of all other
facilities requires a comparable grade operator in responsible charge.
-4-
North Caml i na
Oivision of Environmental Management
Checklist of Facility Components
To be Used In Determing Facility Classification
All information will be printed:
Name of Plantf��ST—
County 61r1\ k.
Owner or Contact Person r r s [_L6 eIJep-iff 7�`'n�/� �;
Telep�tione ..
Mailing Ahress&C.YCi A%E�r;
— ,treet or P.O�$fiox No. Town or-C ty tip
Permit Number Information
Construction Status
NPDES Permit No. Please Check:
Existing Facility
Date Issued Upgraded Facility _
New Facility
State Permit No. 4-GC,o If Upgraded or New Facility, Give:
50% Completion Date
Date Issued 100% Completion Date
Rated by S- 'r, r- -_ _Regional Office s Date
Operator in Responsible Charge_/a fir' �-,;�� t Grade
Design Flow of Plant in GPD %roc 7 Plant Class
ITEM
POINTS
1)
PRETREATMENT UNITS (see definition No. 34) . . . . 2
2)
DESIGN FLOW OF PLANT IN GPD (not applicable to non -
contaminated cooling waters and non -discharging systems)
0 -- 20,D00 . . . . . . . . . . . . . . . . 1
20,001 -- 50,000 . . . . . . . . . . . . . . . . 2
50,001 -- 100,000 . . . . . . . . . . . . . . . . . 3
100,001 -- 250,000 . . . . . . . . . . . . . . . . . . 4
250,001 -- 500,000 . . . . . . . . . . . . . . . . . . 5
500.001 -- 1,000,000 . . . . . . . . . . . . . . . . . . 8
1,000,001 -- 2,000,000 10
2,D00.001 (and up) - rate 1 point additional for each 200.000
GPD capacity up to a maximum of . . . 30
Design Flow (GPD). j „7 G -,
(3)
PRELIMINARY UNITS (see definition No. 3
(a) Influent Pumps (including air lift) . . . . . . . . . 3
b Bar Screens 1
or
(c) Mechanical Screens, Static Screens or Comminuting
Devices . . . . . . . . . . . . . . . . . . . . 2
(d) Grit Removal or . . . . . . . . . . I
(e) Mechanical or Aerated Grit Removal . . . . . . . 2
(f) Flow Measuring Device or . . . . . . . . . . . . . . I
(g) Instrumented Flow Measurement . . . . . . . . . . . . 2
Effective
J,