WQ0006206_Final Permit_19920716

rq■
State of North Carolina '
Department of Environment, Health and Natural Resources
Division of Environmental Management
512 North Salisbury Street • Raleigh, North Carolina 27611
James G. Martin, Governor
William W. Cobey, Jr., Secretary
July 16, 1992
Ms. Jeanette Pippin, Chairperson
Guilford County Board of Education
120 Franklin Blvd.
Greensboro, North Carolina 27401
Dear Ms. Pippin:
A. Preston Howard, Jr., P.E.
Acting Director
Subject: Permit No. WQ0006206
Guilford County Schools
Stokesdale Elementary School
Subsurface Disposal System
Guilford County
In accordance with your application received February 25, 1992, we are forwarding herewith
Permit No. WQ0006206 dated July 16, 1992, to Guilford County Board of Education for the construction
and operation of a 5,000 GPD pressure manifold subsurface wastewater disposal system.
This permit shall be effective from the date of issuance until June 30, 1997, 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.
Regional Offices
Asheville Fayetteville. Mooresville Raleigh Washington Wilmington Winston-Salem
704/251-6208 919/486-1541 704/663-1699 919/733-2314 919/946-6481 919/395-3900 919/761-2351
Pollution Prevention Pays
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone]
An Equal Opportunity Affirmative Action Employer

One set of approved plans and specifications is being forwarded to you. If you need additional
4nformation concerning this matter, please contact Mr. John Seymour at 9191733-5083.
Z'Y,
A. Preston ward, Jr., E
cc: Guilford County Health Department
Winston-Salem Regional Office, Water Quali
Winston-Salem Regional Office, Groundwater
Groundwater Section, Jack Floyd
Training and Certification Unit
Davis -Martin -Powell & Associates, Inc.
Facilities Assessment Unit

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
Guilford County Board of Education
Guilford County
FOR THE
construction and operation of a 5,000 GPD subsurface wastewater disposal system consisting of a new
3,500 gallon grease trap, an existing 10,800 gallon septic tank, an existing 4800 gallon former dosing tank
connected to a new 128 GPM pump station with dual pumps (each capable of 73 GPM for field B) and
high water alarms, separate force mains to field A and field B, pressure manifolds for each field, ten 4 inch
nitrification laterals 9 foot on centers for field A at 310 feet each (totaling 3,100 feet) and nine 4 inch
nitrification laterals 9 foot on center for field B at 200 feet each (totaling 1,800 feet), and all associated
piping, valves, controls, and appurtenances to serve Stokesdale Elementary School with no discharge of
wastes to the surface waters, pursuant to the application received February 25, 1992, 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 June 30, 1997, and shall be subject to
the following specified conditions and limitations:
I. PERFQRMANCE 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 Winston-Salem Regional Office, phone no. 919/ 896-7007 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 Permittee 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.

J
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.
b. 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.
II. OPERATION AND MAINTENANCE RE011TREMENTS
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 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 SA, .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.
2

3. The application rates to the disposal field shall not exceed 0.35 GPD/sq. ft.
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.
5. 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 field(s) and the field(s) shall be routinely
mowed. The clippings shall be periodically removed to prevent the build-up of thatch.
III. MONTTQRING AND REPORTING REQUIREMENTS
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.
If Groundwater sampling indicates or predicts problems with the compliance with Groundwa
Standards, this permit will be modified to include additional and/or more restrictive limitations.
2. 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.
3. Noncompliance Notification:
The Permittee shall report by telephone to the Winston-Salem Regional Office, telephone
no. 919/ 896-7007 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.
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.

IV. GROUNDWATER REQUIREMENTS
1. Any groundwater quality monitoring as deemed necessary by the Division of
Environmental Management shall be provided.
2. The Compliance B,oundM for the disposal system is specified by regulations in 15 NCAC
2L, Classifications and Water Quality Standards applicable to the groundwater of North
Carolina. An exceedance of Groundwater Quality Standards beyond the Compliance
Boundary is subject to penalty provisions applicable under General Statute 143-215.6A.
The sale of property, by the Permittee, which is within or contiguous to the disposal
system site may alter location of the Compliance Boundary.
For facilities permitted on or after December 30, 1983, the Compliance Boundary is
established at the lesser of 250 feet from the subsurface disposal area or 50 feet within the
property boundary.
If the title to any property which may affect the location of the Compliance Boundary is
changed, the permittee shall notify the Division Director within 14 days. The Director shall
then establish a modified Compliance Boundary which will be done as a modification to the
Permit.
The REVIEW BOUNDARY for the disposal system is specified by regulations in 15
NCAC 2L, Groundwater Classifications and Standards. A REVIEW BOUNDARY is
established around disposal systems midway between the Compliance Boundary and the
perimeter of the waste disposal area. When the concentration of any substance equals or
exceeds the maximum allowable concentration of that substance at the REVIEW
BOUNDARY, as determined by monitoring, the permittee shall either (i) demonstrate,
through predictive calculations or modeling, that natural site conditions, facility design and
operational controls will prevent a violation of standards at the Compliance Boundary; or,
(ii) submit a plan for the alteration of existing site conditions, facility design or operational
controls that will prevent a violation of standards at the Compliance Boundary, and
implement that plan upon its approval by the Director.
V. INSPECTIONS
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.
3. 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.
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►_': fel UV 1►
1. This permit shall become voidable unless the facilities are constructed in accordance with
the conditions of this permit, the approved pians, 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.
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. A set of approved plans and specifications for the subject project must be retained by the
applicant for the life of the project.
5. 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).
6. 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 143-215.6A to 143-215.6C.
7. 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.
8. 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.
Permit issued this the 16th day of July, 1992
CAROLINA
/lad
A. PrestonHow d, Jr. P.E.,
Division of Enviro mental Ma
By Authority of the
Permit No. WQ0006206
AL MANAGEMENT COMMISSION
g Director
Management Commission
5

Permit No. WQ0006206
Tuly 16, 1992
Engineer's Certification
I, , as a duly registered Professional Engineer in the State d North Carolina,
having been authorized to observe (periodically, weekly, full time) the construction of the
project,
Project Name
Location
for the
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
u
�

RATING SCALE FOR CLASSIFICATION OF FACILITIES
NoN_ j)i SC4#AZ,6- t^r I/ I 1 t--, t I `
Name of Plant:
SC on
Owner or Contact Person: 1" 5 -,T W)t+ie Vl fP�eLOA c4- t Gt�iL�ar �S,u„ i.G
Mailing Address: 30vxQ 126 F(`LAO;-04,5 t(vd d
G n2e= •s'b�+ro ) Q C -Z :Z 4 a 1
County: G.W' % _.FC. (r__Q Telephone: 4 19— aZI — 0
-% "8E VDi,D=iNPDES Permit No. NC00 3 30 Nondisc, Per. No. \,)Q BD6 (2oL
Issue Date: Nc is5+ce� Expiration Date: Prcisw�
Existing Facility om +tea New Facility
Rated By: A, OOStr'&m _ Date:
Reviewed (Train. & Cert.) Reg. Office
Reviewed (Train. & Cert.) Central Offi
ORC Ric,6xA :Yegja;, iS Grade
Plant Class: (circle one) V 11 111 IV Total Points_
ITEM .� SWL 3C�C� Sl s+*'tr1k POINTS
(1) Industrial Pretreatment -Units and/or
Industrial Pretreatment Program
(see definition No. 33) 4
(2) DESIGN FLOW OF PLANT IN GPD
(not applicable to non -contaminated cooling waters, sludge
handling facilities lot water purification plants, totally
closed cycle systems (del. No. 11), and facilities
consisting only of Item (4) (d) or Items (4) (d) and (11) (
0 - 20,000 .......................... 1
20,001 50.000 ..........................
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
2,000,001 (and up) - rate 1 point additional for each
200,000 gpd capacity up to a
maximum of 30
Design Flow (gpd) : G a 4
(3) PRELIMINARY UNITS (see definition no. 32)
(a) Bar Screens ................................ 1
or
(b) Mechanical Screens, Static Screens or
Comminuting Devices ........... ............. 2
(c) Grit Removal ............................... i
(5) SECONDARY TREATMENT UNITS
(a) Carbonaceous Stage
(i)Aeration - High Purity Oxygen System .....
Diffused Air System ...........
Mechanical Air System (fixed,
floating or rotor) ..... . ....... .
Separate Sludge Reaeration .....
(ii) Trickling Filter
High Rate ...................
Standard Rate ...............
Packed Tower ...............
(iii) Biological Aerated Filter or Aerated
Biological Filter ......................
(iv) Aerated Lagoons ..................... .
or
(d) Mechanical or Aerated Grit Removal ........... 2
(e) FlowMeasuring Device ....................... CD
or 0�
(f) Instrumented Flow Measurement .............. 2 ib
(9) Preaeration................................ 2 41
X, 1E`
(h) influent Flow -Equalization ................... 2 00 2P.
(t)
(t) Grease or Oil Separators - Gravity .......... P21,
Sk4
Mechanical. .........;95�
Dissolved Air Flotation. 8'
01 Prechlorination .............................. 5
PRIMARY TREATMENT UNITS
(a) Septic Tank (see definition no. 43) ..............
(b) Imhoff Tank ..................................
(c) Primary Clarifiers ............................ 5
(d) Settling Ponds or Settling Tanks for Inorganic
Non-toxic Materials (sludge handling facilities
for water purification plants, sand, gravel,
stone, and other mining operations except
recreational activities such as gem or gold
(v) Rotaling Biological Contactors ..........
(vi) Sand Filters -
intermittent biological .... .
recirculating biological .... _
(vii) Stabilization Lagoons ...................
.(viii)Clarifier ..............................
(ix) Single stage system for combined
carbonaceous removal of BOD and
nitrogenous removal by nitrification
(see del. No. 12) (Points for this item
have to be in addition to items (5) (a)
(1) through (5) (a) (vin) .................
(x) Nutrient additions to enhance BOD
removal...............................
(xi) Biological Culture ('Super Bugs") addition
+ to enhance organic compound removal .....
(b) Nitrogenous Stage
(i) Aeration - High Purity Oxygen System .... .
Diffused Air System ...........
Mechanical Air System (fixed,
floating, or rotor) ...... ......
Separate Sludge Reaeration .... ,
(il) Trickling Filter -
High Rate ..............
Standard Rale ............
Packed Tower............
(iii) Biological Aerated Filter or Aerated
Biological Filler ........................ .
(iv) Rotating Biological Contactors ............
(v) Sand Filter -
intermittent biological ........
recirculating biological . , ..... .
(vi) Clarifier ................................
20
10
10
10
10
2
3
a
5
20
10
8
3
7
5
5
10
10

(6) TERTIARY:OR ADVANCED TREATMENT UNIT
(0 Activated Carbons Beds -
(10) -CHEMICAL ADDITION SYSTEM (S) (See definition No. 9)
without carbon regeneration .................. 5
(not applicable to chemical additions rated as item
with carbon regeneration ............ . ....... is
(3) if). (5) (a) (xi), (6) (a), (6) (b). (7) (b), (7) (e),
} Powdered or Granular Activated Carbon Feed -
(9) (a), (9) (b), or (9) (c) 5 points each: List:
Without carbon regeneration ................. 5
5
with carbon regeneration .... ............. 15
5
(c) Air Stripping . ..................... .. .. 5
5
(d) Denitrification Process (separate process) ..... lo
5
(e) Electrodialysis .............................. 5
(g Foam Separation . . ........................... 5
f )
1 MISCELLANEOUS UNITS
(
(g) Ion Exchange................................ 5
(a) Holding Ponds, Holding Tanks or Settling fonds
(h) Land Application of Treated Effluent
for Organic or Toxic Materials including wastes
(see definition no. 22b) (not applicable for
from mining operations containing nitrogen and/or
sand, gravel, stone and other similar mining
phosphorous compounds in amounts significantly
operations)
greater than is common for domestic wastewater .......... 4
(i) on agriaillurally managed sites (See def.
(b) Effluent Flow Equalization (not applicable to storage
No_ 4) ......... . ......................... 10
basins which are inherent in land application systems). 2
(ii) by high rate infiltration on non-agriculturally
(c) Stage Discharge (not applicable to storage basins
managed sites (includes rotary distributors
inherent in land application systems ....................................... 5
(d) Pumps." .":.............. ._ _ .. _.__ ....�....�
and similar fixed nozzle systems) ........... 4
e Stand-ByPower Supply ....._......_e3
()
(iii) by subsurface disposal (includes low pressure
l ................."-�"............
(f) Thermal Pollution Control Device........................................._.. 3
pipe systems and gravity systems except at
plants consisting of septic tank and nilrifica-
tion lines only) ............................. 4
TOTAL POINTS
(i) Microscreens ...... . . . ........................ 5
(j) Phosphorus Remo♦al by Biological Processes .
CLASSIFICATION
(See def. No. 26) ............................ 20
(k) Polishing Ponds - without aeration ....... 2
Class I.............................. , ".... 5 - 25 Points
with aeralion .......... 5
Class Il......_---..._-...___....__ .. .._.." 26- 50 Points
(I) Post Aeration - cascade .............. 0
Class III ................................. _ 51. 65 Points
diffused or mechanical ... 5
Class IV-, ......... ......................... __ 66- Up Points
(m) Reverse Osmosis ............................... 5
(n) Sand or Mixed-Media Fitters - low rate ........ ... 2
Facilities having a rating of one through four points, inclusive,
high rate .......... 5
do not require a certified operator. Classification of all other
(o) Treatment processes for removal of metal or
facilities requires a comparable grade operator in responsible
cyanide.................................... 15
charge-
,p) Treatment processes for removal of toxic
materials other than metal or cyanide ....... _ . 15
Facilities having an activated sludge process will be assigned
a minimum classification of Class 11,
SLUDGE TREATMENT
(a) Sludge Digestion Tank - Heated...............
Facilities having treatment processes for the removal of metal
10
Aerobic....... . .. . .. . .
or cyanide will be assigned a minimum classification of Class 11.
5
Unheated...... .......
(b) Sludge Stabilization (chemical or thermal)
3 Facilities having treatment processes for the biological removal
5
.......
(c) Sludge Drying Beds - Gravity.................
of phosphorus will be assigned a minimum classification of Class
2 Ill.
Vacuum Assisted .......
5
(d) Sludge Elutriation .......................... . ..
5 In-plant processes and related control ejuipment which are an
(e) Sludge Conditioner (chemical or thermal) ...... _ .
5 integral part 'of industrial production shall not be considered waste
(f) Sludge Thickener (gravity) ......................
5 treatment. Likewise, discharges of wastewater from residences
(g) Dissolved Air Flotation Unit
having a design flow of 1,000 gpd or less, shall not be subject to
(not applicable to a unit rates as (3) (i) .........
8 rating.
(h) Sludge Gas Utilization (including gas storage) ....
2
(i) Sludge Holding Tank - Aeraled ................
S ADDITIQNALMM T -
Non-aerated ............
2
(j) Sludge Incinerator - (not including activated
carbon regeneration) .....
10 -
(k) Vacuum Filter, Centrifuge or Filter Press or other
similar dewatering devices ................ I ... 10
(6) SLUDGE DISPOSAL (including incinerated ash)
(a) Lagoons........................................
2
(b) Land Application (surface and subsurface)
(see definition 22a)
-where the facility holds the land app. permit ... 10
-by contracting to a land application operator who
holds the land application permit ................
2
-land application of sludge by a contractor who does
not hold the permit for the wastewater treatment
facility where the sludge is generated ......... 10
(c) Landfilled (burial) ............................
5
(9) DISINFECTION
(a) Chlorination .............................
5
(b) Dechlorination .................... . ...
5
(c) Ozone ..............................
5
(d) radiation ..........................
5