WQ0006637_Final Permit_19921016

State of North Carolina
Department of Environment, Health and Natural Resources
Division of Environmental Management
512 North Salisbury Street • Raleigh, North Carolina 27611
Jaynes G. Martin, Governor
William W. Cobey, Jr., Secretary
October 16, 1992
Billy T. Pell, Town Manager
Town of Pilot Mountain
P.O. Drawer AA
Pilot Mountain, N.C. 27041
A. Preston Howard, Jr., P.E.
Acting Director
Subject: Permit No. WQ0006637
Town of Pilot Mountain
Wastewater Treatment Plant
Compost Facility
Surry County
Dear Mr. Pell:
In accordance with your application received June 15, 1992, we are forwarding herewith Permit
No. WQ0006637, dated October 16, 1992, to Town of Pilot Mountain for the construction and operation
of the subject composting facilities.
This permit shall be effective from the date of issuance until September 30, 1997, and shall be
subject to the conditions and limitations as specified therein. Please pay particular attention to the
distribution 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 919/5714700 919/946-6481 919/395-3900 919/896-7007
Pollution Prevention Pays
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone]
An Equal Opportunity Affirmative Action Employer

Town of Pilot Mountain
October 16, 1992
Page Two
One set of approved plans and specifications is being forwarded to you. if you need additional
information concerning this matter, please contact Mr. Michael D. Allen at [phone].
cc: Surry County Health Department
Winston-Salem Regional Office, Water Quality
Winston-Salem Regional Office, Groundwater
Groundwater Section, Jack Floyd
Training and Certification Unit
Facility Assessment Unit
in rely,
Liki-r,
A. Prestoin
0)

NORTH CAROLINA
ENVIRONMENTAL MANAGEMENT COMMISSION
DEPARTMENT OF ENVIRONMENT, HEALTH AND NATURAL RESOURCES
RALEIGH
COMPOST 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
Town of Pilot Mountain
Surry County
FOR THE
construction and operation of a wastewater treatment plant sludge composting facility consisting of a
concrete pad (160.0' x 100.0') with an underdrain for collection of leachate which will be pumped back to
the head of the wastewater treatment plant, for the composting sludge for the sources listed in Condition II
3 by having the sludge combined with wood chips, aerated for 21 days, dried for 6 days and then
screened, to serve the Town of Pilot Mountain with no discharge of wastes to the surface waters, pursuant
to the application received June 15, 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. September 30, 1997, and shall be
subject to the following speed conditions and limitations:
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. [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.

3. This permit shall become voidable in the event of failure of the sludge composting facility
to adequately protect the assigned water quality standards of the surface waters and
groundwaters.
4. The sludge composting program shall be effectively maintained and operated as a non -
discharge system to prevent discharge of any wastes resulting from the operation of this
program.
5. 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.
6. In the event that the sludge composting program is not operated satisfactorily, including the
creation of nuisance conditions, the Permittee shall take such immediate corrective action as
may be required by this Department, including the construction of additional or replacement
wastewater treatment or disposal facilities.
7. Diversion or bypassing of the untreated sludge or compost drainage wastewater from the
compost facilities is prohibited.
8. Compost sludge should not be used in areas of intense public use (schools, playgrounds,
etc.).
H. QPERATION AND MAINTENANCE REQUIREMENTS
1. The facilities and disposal sites shall be properly maintained and operated at all times.
2. The sludge composting operation must be conducted under the supervision of the certified
wastewater treatment plant operator required by the Certification Commission for operation
of the Town of Pilot Mountain Wastewater Treatment Plant, NPDES Permit No.
NC0026646.
3. No sludges other than the following are hereby approved for composting in accordance
with this permit:
Permit Estimated Volume
S! 2 krSf Count _ Number (dry_ tons I , -earl
Town of Pilot Mountain Surry NCO026646 547.5
4. All compost shall be stored on the concrete composting pad during composting and until
such time as it is distributed to the buyer. If an alternate storage site is to be used, approval
must be obtained from the Division of Environmental Management.
5. No compost shall be marketed that does not meet the criteria for the Process to Further
Reduce Pathogens, which for a static aerated pile the compost pile must be maintained at
operating temperatures of 550 C (1310 F) or greater for three (3) days. The use of any
other composting method shall require a permit amendment prior to the distribution of any
such compost.
i,

Any monitoring (including groundwater, surface water, sludge, soil, or plant tissue
analyses) deemed necessary by the Division of Environmental Management to insure
protection of the environment will be established and an acceptable sampling and reporting
schedule shall be followed.
2. The Town of Pilot Mountain shall maintain records including, but not limited to the
following:
a. volume, source, and analysis of sludge and compost
b. date, duration and temperature during composting
c. name of compost recipient, volume received, and intended use
An annual summary report (three copies) of the records required above shall be submitted
on or before September 1 of the following year by the Town of Pilot Mountain, to the
following address:
NC Division of Environmental Management
Water Quality Section
Facility Assessment Unit
PO Box 29535
Raleigh, NC 27626-0535
3. The Town of Pilot Mountain shall present to each recipient of compost, written information
that clearly states:
a) that compost sludge cannot be used on areas where root or leaf crops for direct
human consumption are to be grown within one (1) year of the last application of
compost to the site
b) that the compost is composed of wastewater sludge
c) the metal concentrations
d) the rates of appliation
e) approximate fertilizer equivalence
f) recommendations to the compost recipients for satisfactory uses of compost
material such as horticulture, silvicultural, other agricultural uses not specifically
prohibited, etc.
4. Noncompliance Notification:
The Permittee shall report by telephone to the Winston-Salem 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 with the composting program which results in the composting of
significant amounts of wastes which are abnormal in quantity or characteristic.
3

b. Any failure of the composting program resulting in a discharge of wastes to
receiving waters.
C. Any time that self -monitoring information indicates that the facility has gone out of
compliance with the conditions and limitations of this permit or the parameters on
which the system was designed.
d. Any process unit failure, due to known or unknown reasons, that render the facility
incapable of adequate sludge treatment.
e. Any leakage or spillage that occurs during the transfer or transport of the compost
material.
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.
1. Any groundwater quality monitoring as deemed necessary by the Division of
Environmental Management shall be provided.
V . INSPECTIONS
1. The Permittee or his designee shall inspect the sludge storage, transport, and composting
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 by the Division of Environmental Management or other permitting authority.
2. 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 composting facility 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 CONDITIONS.
This permit shall become voidable unless the land application activities are carried out in
accordance with the conditions of this permit and in the manner approved by this Division.
2. This permit is effective only with respect to the nature and volume of wastes described in
the application and other supporting data.
4

Permit No. WQ0006637
October 16, 1992
En Rineefs Certif cation
I, , 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,
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
Date
Registration N

3. This permit is not transferable. In the event there is a desire for the facilities to change
ownership or 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. 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.
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. 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.
7. A set of approved documents for the subject project must be retained by the applicant for
the life of the project.
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.
9. This permit may be modified or reissued to incorporate any conditions, limitations and
monitoring requirements the Division of Environmental Management deems necessary in
order to adequately protect the environment and public health.
Permit issued this the 16th day of October, 1992
NORTH-CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
A. Preston Hove
Division of Envy
By Authority of
Permit No. WQ0006637
Acting Director
'13 aizement
Management Commission
5

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RATING SCALE FOR CLASSIFICATION OF FACILITIES
Name
of Plant:
Towel o1z, PILOT NAoo,ar"&j
WWTt7 (C
Owner
or Contact
Person: Ml=. Diut. PC(-Ll
Towtt NkANA&Ek
Mailing.,
Address:
Po- T>P_A.wm A,A
PK-OT
County:
�UL-P_,
Telephone:
(919) 36g- -,—?2A7
NP.DES
Permit No.
NC00 ZC,,CACa Nondisc. Per- No. W&060cocP37
issue Date: Expiration Date:
Existing Facility New Facility
Rated By: MtgfL\E�-t_ L_L Date:
Reviewed (Train. & Cert.) Reg
Office
Reviewed (Train. & Cert.) Central Office
ORC TEVeY TiA.lrAON5 Grade
Plant Class: (circle one) 0 11 III IV Total Points-,)
ITEM 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 for water purification plants, totally
closed cycle systems (def. No. 11). and facilities
consisting only of Item (4) (d) or Items (4) (d) and {1 1) (d))
0 - 20,000..........................
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
2,000,001 (and up) - rate 1 point additional for each
200,000 gpd capacity up to a
maximum of 30
Design Flow (gpd) :
(3) PRELIMINARY UNITS (see defin+lion no. 32)
(a) Bar acreens................................
1
or
(b) Mechanical Screens, Static Screens or
Comminuting Devices ........... ............. 2
(c) Grit Removal ............................... 1
or
(d) Mechanical or Aerated Grit Removal ........... 2
(e) Flow Measuring Device ....................... 1
or
(Q Instrumented Flow Measurement .............. 2
(g)PreaeraGon................................ 2
(h) Influent Flow -Equalization ................... 2
[i) Grease or Oil Separators - Gravity .......... 2
Mechanical.......... 3
Dissolved Air Flotation. 8
j Prechlorination .......................... 5
(4) PRIMARY TREATMENT UNITS
(a) Seplic Tank (see detiniition no. 43) ............... 2
(b) Imhoff Tank .................................. 5
(c) Primary Clarifiers ............................ 5
(d) SeWing Ponds' or Settling Tanks for inorganic
Non -toxic Materials {sludge handling facilities
for Nvaler purification plants, sand, gravel,
stone, and other mininn ow ralinnc excrnt
(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 Reaeralion .....
(ii) Trickling Filler
High Rate ...................
Standard Rate ...............
Packed Tower—...,.,..,,,,,
(ii!) Biological Aerated Filler or Aerated
Biological Filter ......................
(iv) Aerated Lagoons ..................... .
(v) Rotating Biological Contactors ..........
(vi) Sand Filters -
intermittent biological .....
recirculating biological .... .
(vti S;abilizalion Lagoons ...................
(viii)Clarifier ..............................
(ix) Single stage system fur combined
carbonaceous removal of BOD and
nitrogenous removal by nitrification
(see def. No. 12) (Points for this item
have to be in addition to items (5) (a)
() through (5) (a) (vir7j ........ ..... .
(x) Nulrieni additions to enhance BOD
femovai......... .. ..................
(xii 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 Reaeralion
(ii) Trickling Filter -
High Rate ...............
Standard Rate ............
Packed Tower............
(Ili) Biological Aerated Filler or Aerated
Biological Flier .........................
(iv) Rotating Biological Contactors .............
(v) Sand Filter-
intermiuent biological ....... .
20
10
a
3
7
5
5
10
10
10
20
10
10
10
2

er
t3 TERTIARY OR ADVANCED TREATMENT UNIT
ri) Activated Carbons Beds -
.rithout carbon regeneration .................. 5
with carbon regeneration .................... is
(b) Powdered or Granular Activated Carbon Feed -
without carbon regeneration ................. 5
with carbon regeneration .................... 15
(_) Air Stripping ........................... 5
(d) Denitrification Process (separate process) ..... 10
(0 Foam Separation ............................. 5
(g) [on Exchange ................................ 5
(h) Land Application of treated Eilluenl
(see definition no. 22b) (not applicable for
rand, gravel, stone and other similar mining
operations)
(i) on agriculturatly managed sites (See del.
No.4)................................... 10
(ii) by high rate infiltration on non-agricuitu rally
managed sites (includes rotary distributors
and similar Coxed nozzle systems) ........... 4
(M) by subsurface disposal (includes low pressure
pipe systems and gravity systems except at
plants consisting or septic tank and nitrifica-
tion lines only) 4
n Microscreens.....F
..... ....................... 5
{j) Phosphorus Removal by Biological Processes
(See def. No.26) ............................ 20
(k) Polishing Ponds - without aeration ....... 2
with aeration .......... 5
(t) Post Aeration - cascade .............. 0
diffused or mechanical ... 5
(m) Reverse Osmosis ............................... 5
i Sand or Mixed -media Filters - low rile ........... 2
high rate .......... 5
(o) Treatment processes for removal of metal or
cyanide.................................... 15
(p) Treatment processes for removal of toxic
materials other than metal or cyanide ......... 15
SLUDGE TREATMENT
(a) Sludge Digestion Tank -Healed ............... 1f1
Aerobic .... .......... .
Unheated .... 3
(b) Sludge Stabilization (chemical or thermal) ....... 5
(c) Sludge Drying Beds - Gravity .................
Vacuum Assisted ....... 5
(d) Sludge Elulrialion ......... ................... . 5
(e) Sludge Conditioner (chemical or thermal) ........ 5
(f) Sludge Thickener (gravity) ...................... 5
(g) Dissolved Air flotation Unit
(not applicable to a unit rates as (3) W ......... e
(h) Sludge Gas Ulifization (including gas storage) .... 2
(i) Sludge Holding Tank - Aerated ................ 5
Non -aerated ............ 2
nj Sludge Incinerator - (not including activated
carbon regeneration) , .... 10
(k) Vacuum Filler, Centrifuge or Filler Press or other
similar dewalering devices .................... 10
(B) 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 con4ractor who does
not hold the permit for the wastewater treatment
facility where the sludge -is generated ......... 10
(c) Landfilled (burial) .............................. 5
(9) MSINFECTION
(a) Chlorination ........................ ..... 5
(b) Dechlorinatron .................... 5
r,1 r-hone ........................... 5
(10) CHEMICAL ADDITION SYSTEM (S) (See definition No. 9)
(not applicable to chemical additions rated as item
(3) (j). (5) (a) (xi), (6) (a), (6) (b), (7) (b), (1) (e),
(9) (a), (9) (b), or (9) (c) 5 points each: List:
5
5
(11) MISCELLANEOUS UNITS
(a) Holding Ponds, Holding Tanks or Settling Ponds
for Organic or Toxic Materials including wastes
from mining operations Containing nitrogen and/or
phosphorous compounds in amounts significantly
greater than is common for domestic waslewater .......... 4
(b) Effluent Flow Equalization (not applicable to storage
basins which are inherent In land application systems). 2
(c) Stage Discharge (not applicable to storage basins
inherent in land application systems .... .................. ............... 5
(d) Pumps.-...._:....... - - __ 3
(e) Stand -By Power 3
(f) Thermal Pollution Control 3
TOTAL POINTS 10
CLASSIRGAT10N
Class I„.- 5 - 25 Points
Class !!.__ _� 26- 50 Points
Class III — 51- 65 Points
Class fV66- Up Points
Facilities having a rating of one through lour points, inclusive,
do not require a certified operator. Classification of all other
facilities requires a comparable grade operator In responsible
charge.
Facilities having an activated sludge process will be assigned
a minimum classification of Class II.
Facilities having treatment processes for the removal of metal
or cyanide will be assigned a minimum classification of Class II.
Facilities having treatment processes for the biological removal
of phosphorus will be assigned a minimum classification of Class
III -
In -plant processes and related control equipment which are ar,
integral par! of industrial production shall not be considered waste
treatment. Likewise, discharges of wastewater from residences
having a design flow of 1,000 god or less, shall not be subject to
rating.
ADDITIONAL. COMMENTS: