NC0020842_wasteload allocation_19930524

NPDES DOCUWENT SCANNING COVER SHEET
1.
NPDES Permit:
NC0020842
Snow Hill WWTP
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Speculative Limits
Correspondence
re:
Instream Assessment (6713)
Environmental Assessment (EA)
Permit
History
Document Date:
May 24, 1993
This document iB printed on reuse paper -ignore any
content on the reverse Bide

NPDES WASTE LOAD ALLOCATION
PERMIT NO.: NC0020842
PERMITTEE NAME: Town of Snow Hill
FACILITY NAME: Snow Hill WWTP
Facility Status: Existm'
Permit Status: Renewal
Major Minor
Pipe No.: 001
Design Capacity: 0.250 MGD
Domestic (% of Flow): 90 %**
Industrial (% of Flow): 10 %**
Comments:
**From old staff re on. PIRF has been requested.
RECEIVING STREAM: Contentnea Creek
Class: C-Swam NSW
Sub -Basin: 03-04-07
Reference USGS Quad: F 28 NNV (please attach)
County: Greene
Regional Office: Washington Regional Office
Previous Exp. Date: 5/30/93 Treatment Plant Class:
Classification changes within three miles:
No change
Requested by: Charles Lowe Dom: 10/9/92
Prepared by: Date: !ei3
3
Reviewed by: ..1 .fir
Date: /
�a©w
Modeler Date Rec. #
1=1L to �tl qz_ `11�FS
Area
Drainage mil
g ( ) 10 Avg. Streamflow (cfs):
7Q10 (cfs Winter Winter 7Q10 (cfs) �� %% 30Q2 (cfs)
Toxicity Limits: IWC _ % Acute/Chronic ~
Instream Monitoring:
Parameters GSA P�1. f v
Upstream �m/t�if•��rtG�C Location ✓O.d�ryri' o�vr,,I%�
Downstream 6&kLocation A-1 d tfrc
Effluent
Characteristics
BOD5 (mg/1)
NH3-N (mg/1)
D.O. (mg/1)
TSS (mg/1)
F. Col. (/100 ml)
PH (SU)
Comments:
P--��
oC
3D
rho•
30
ZOO
rhvyiifa�'

FACT SHEET FOR WASTELOAD ALLOCATION
Request # 7145
Facility Name:
Town of Snow Hill/Snow Hill WWTP . ,
RECEIVED
NPDES No.:
NCO020842
WASHINGTON
OFFICE
Type of Waste:
Domestic -100%
Facility Status:
Existing
APR 2 9 1913
Permit Status:
Renewal
Receiving Stream:
Contentnea Creek
Stream Classification:
C-Swamp
Subbasin:
030407
--�
County:
Greene
Stream ChafacteriS ic:
old WLA
Regional Office:
Washington
USGS #
Requestor:
Lowe
Date:
1988
Date of Request:
10/9/92
Drainage Area (mi2):
703
Topo Quad:
F28NW
Summer 7Q10 (cfs):
31.4
Winter 7Q10 (cfs):
57.7
Average Flow (cfs):
844
30Q2 (cfs):
IWC M:
1.2
Wasteload Allocation Summary
(approach taken, correspondence with region, EPA, etc.)
Contentnea Creek is the target of a field study and subsequent recommendations from the results
of this study. The study is scheduled to be completed within the next five years. Snow Hill's
discharge interacts with other nearby facilities, and may be required to meet more stringent limits
upon expansion. Fecal limit was changed from 1000/100 ml to 200/100 ml. Cr wil & dalpr eej.
Clements (Tech. Supp.) recommended a WET test @ 1.2% in his 1988 WLA, but this was
eliminated by DEM in a 4/28/89 letter as the only industrial user (Snow Hill Tape Co.) went to land
application of their discharge.
Special Schedule Requirements and additional comments from Reviewers:
Recommended by: Date: D J�
Reviewed by
E��
Instream Assessment: ��8 Date:
Regional Supervisor: Date: t5
i
Permits & Engineering: Date: S
RETURN TO TECHNICAL SERVICES BY: MAY 2 6 1993

VA
PARAMETERS
Existing Limits:
Monthly Average
Wasteflow (MGD):
0.25
BODS (mg/1):
30.0
NH3N (mg/1):
monitor
DO (mg/1):
monitor
TSS (mg/1):
30.0
Fecal Col. (/100 ml):
1000.0
pH (SU):
6-9
Residual Chlorine (µg/l):
monitor
Temperature (°C):
monitor
TP (mg/1):
monitor
TN (mg/1):
monitor
Total Chromium (µg/1):
monitor
Recommended Limits:
Monthly Average
Wasteflow (MGD):
0.25
BODS (mg/1):
30.0 EL
NH3N (mg/1):
monitor
DO (mg/1):
monitor
TSS (mg/1):
30.0 EL
Fecal Col. (/100 ml):
200.0
pH (SU):
6-9
Residual Chlorine (4g/1):
monitor
Temperature (°C):
monitor
TP (mgp):
monitor
TN (mg/1):
monitor
x No parameters are water quality limited, but this discharge may affect future allocations.
INSTREAM MONITORING REQUIREMENTS
Upstream Location: Contentnea Creek approximately 0.25 miles upstream of outfall
Downstream Location: Contentnea Creek at nearest downstream bridge
Parameters: Fecal, Temperature, DO, Conductivity

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w OF SNOW HILL - Allowable Waste Concentrations
SUMMER
Residual Chlorm
Ammonia _NH3
2&F>s .
as e&e> .
ea
Reg Eo wGm
E25 DESIGN FLOW wGm
cgs
DESIGN &o (CF)s
0.3875DESIGN FLOW §Fs
0.3875.
STREAM STD uG/L
,Tom TRAM aDwGLi)
1.0
uG BACKGROUND LEVEL (UG/L)
o uq BACKGROUND LEVEL w@E>
022
Iw
,2s26 me
1.219033
m�A.a�mk_
„,4:# mlowableConcentration#�i
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104E>S
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DESIGN Eo ,Gm
0.25
DESIGN FLOW (c S)
os
:",STREAM S D(MG/)
13
.*UPS BACKGROUND evL(Mc)
aE
me
0.667097
Allowable Concem e m,
23 a71
NQoo2&2 mG #2�A3

To: Permits and Engineering Unit
Water Quality Section
Attention: Charles Lowe
Date: November19, 1992
NPDES STAFF REPORT AND RECOMMENDATION
Greene County
Permit No. NC0020842
PART I - GENERAL INFORMATION
1. Facility and Address:
Town of Snow Hill WWTP
304 N. Green St.
Snow Hill NC
2. Date of Investigation: 10/19/92
3.
4.
Report Prepared by: Marjorie L. Meares
Person(s) Contacted and Telephone Number(s):
Donald Hart [phone]
5. Directions to Site: From the intersection of N. Greene St. and
2i4 St., travel south on 2°° St. for 0.3 miles. Turn left on private
dirt road and travel 0.2 miles to WWTP
6.
Discharge Point(s), List for all discharge points:
Existing:
Latitude: 35' 27' 30" N
USGS Quad No.
Longitude: 77` 39' 30" W
USGS Quad Name: Snow Hill, NC
7. Size (land available for expansion and upgrading):
City owns 26 acres on site, there is some room for
expansion.

8. Topography (relationship to flood plain included)
Relatively flat at approx. 10 feet above MSL. The plant is
in the 100 year flood plain. All treatment units, except
sludge,drying, are greater than 15 feet above ground level
9. Location of nearest dwelling:
150 yards from office/lab. Greater than 500 yards from the
treatment works.
10. Receiving stream or affected surface waters:
Contentnea Creek
a. Classification: C Sw NSW
b. River Basin and Subbasin No.: 03-04-07
C. Describe receiving stream features and pertinent
downstream uses: drainage, boating, fishing
PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. Type of wastewater:
100% Domestic
000% Industrial
a. Volume of Wastewater: 0.25 MGD (Design Capacity)
b. Types and quantities of industrial wastewater:
none
C. Prevalent toxic constituents in wastewater:
none known
d. Pretreatment Program (POTWs only):
In development Approved _
Should be required Not needed XXX
4. Type of treatment (specify whether proposed or existing):
Existing dual contact stabilization plants consisting of
bar screen, contact chamber, reareation chamber,
clairifier, chlorine contact chamber, aerobic sludge
digester and sludge drying beds.
5. Sludge handling and disposal scheme:
drying beds, disposal at landfill
6. Treatment plant classification: II (see attached rating sheet)

7. SIC Code(s)
Wastewater Code(s): Primary 01 Secondary
MTU Code : 09001
PART III - OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction Grant Funds
(municipals only)?
no
2. Special monitoring requests:
none
3. Additional effluent limits requested:
none
4. Other:
none
PART IV - EVALUATION AND RECOMMENDATIONS
Based on a site visit and a file review, it is the
reccomendation of the Washington Regional Office that this
permit be renewed in keeping with the Nuese River Basin
permitting schedule. There is no industry discharging into the
Snow Hill WWTP. Their Pretreatment program is .currently inactive
and not needed at the present time.
&c
Sign ure of report preparer
lc
Water Quality Regional Supervisor

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14a0t0oq�'�z
NPDES PRETREATMENT INFORMATION REQUEST FORM
T_ / / n
vv /'
(FACILITY NAME: NPDES NO. NC00 I
I iREQJES
[.DATE: �REGION:
TER:
I
I I
a-Mwi5mv•• •
PREI'REAT=
isa,:.fac-lity"�ha'no SIUs and should not have retreatment e.
langua p g
ty should and/or is developing a pretreatment program.
k. 6 Wi de the following conditions:
Program Development
OCT 0 9 1992 Phase I due
' Phase II due
TECHNICAL SUPPORT BRANCH Additional Conditions
�" (attached) I
This facility is bU rently implementing a pretreatment program.
Please include the following conditions:
Program Implementation
_ Z Additional Conditions ,
(attached)
I o�ts�" " -" " ` S s �. -�. c. ►r � S -- 5 Q P. 'f � -e i�tyCc{ Pd
SIGNIFICANT INDUSTRIAL USERS, (SIUS) CONTRIBUTIONS h e Pry( 4-6
I
SIU FUM - TOTAL: OJA e
- COrMOSITION:MGD `(_
METAL FINISHING:
MGD
F
OTHER:MKZ
I
MGD
Mim
MGD
I s-e �_
HFAMP.KS REVIEW
PASS , ry
PARAMETER -
THROUGH DAILY LOAD IN LBS/DAY P.CTUAL
I
DOr�S'IrIC pEmgi � INDUSTRIAL % REMOVAL
Cd
Cr
Cu I
I.
Ni
Pb '
Zn
i CN
Phenol
I ' "
.Other I'
I I
I I
! ,
RFX'^ IVED : REVIEWED BY, RFRJFa ED :
'

Pan III
Page 1 of
PART III
OTHER REQUIREMENTS
�S �i .� ldlL�llB-71V��wi•�'viui�u.-�-�+. - __ _ _ _ __ __L � �__ u — _ - Z'
1. Effluent limitations are listed in Part I of this permit. Other pollutants attributable to inputs
from industries using the municipal system may be present in the permittee's discharge. At
such rime as sufficient information becomes available to establish limitations for such
pollutants, this permit may be revised to specify effluent limitations for any or all of such
other pollutants in accordance with best practicable technology or water quality standards.
2. Under no circumstances shall the permittee allow introduction of the following wastes in
the waste treatment system:
a. Pollutants which create a fire or explosion hazard in the POTW, including, but not
limited to, wastestreams with a closed cup flashpoint of less than 140 Degrees
Fahrenheit or 60 degrees centigrade using the test methods specified in ATSIM
standards D-93-79, D-93-80, or D-3278 (incorporated by reference, see 40 CFR
260.11). This prohibition does not apply to any aqueous solution containing less than
24 percent alcohol by volume which would otherwise be a hazardous waste under 40.
CFR 261.21 by virtue of having a closed cup flashpoint of less than 140 degrees
Fahrenheit or 60 degrees centigrade;
b. Wastes which will cause corrosive structural damage to treatment works, and in no case
discharges with a pH less than 5.0 standard units unless the system is specifically
designed to accommodate such discharges;
c. Solid or viscous substances in amounts which cause obstructions to the flow in sewers
or interference with the proper operation of the treatment works;
Wastewaters at a flow rate and/or pollutant concentration which will cause an
inhibition or disruption of the POTW, its treatment processes, operation, or sludge
use and disposal;
e. Heat in amounts which will inhibit biological activity in the treatment works, resulting
in interference but in no case heat in such quantities that the temperature at the treatment
works influent exceeds 40°C (104°F) unless the works are designed to
=accommodate such heat;
f. Petroleum oil, nonbiodegradable cutting oil, or products of mineral oil origin in
amounts that will cause interference or pass through;
g. Pollutants which result in the presence of toxic gases, vapors, or fumes within the
POTIN in quantity that may cause acute worker health and safety problems;
h. Any trucked or hauled pollutants, except at discharge points designated by the POTW.
3. With regard to the effluent requirements listed in Part I of this permit, it may be necessary
for the perm ttee to supplement the requirements of the Federal Pretreatment Standards (40
CFR, Part 403) to ensure compliance by the permittee with all applicable effluent
limitations. Such actions by the permittee may be necessary regarding some or all of the
industries discharging to the municipal system.

Pan III
Page 2 of 4
4. The permittee shall require any industrial discharges into the permitted system to meet
Federal Pretreatment Standards promulgated in response to Section 307(b) of the Act.
Prior to accepting wastewater from any significant industrial user, the perminee shall either
develop and submit to the Division a Pretreatment Program for approval per 15 NCAC 2H
.0907(a) or modify an existing Pretreatment Program per 15 NCAC 2H .0907(b).
5. This permit shall be modified, or alternatively, revoked and reissued, to incorporate or
modify an approved POTW Pretreatment Program or to include a compliance schedule for
the development of a POTW Pretreatment Program as required under Section 402(b)(8) of
the Clean Water Act and implementing regulations or by the requirements of the approved
State pretreatment program, as appropriate.
Under authority of sections 307(b) and (c) and 402(b)(8) of the Clean Water Act and
implementing regulations 40 CFR Pan 403, North Carolina General Statute 143-215.3 (14)
and implementing regulations 15 NCAC 2H .0900, and in accordance with the approved
pretreatment program, all provisions and regulations contained and referenced in the
Pretreatment Program Submittal are an enforceable part of this NPDES permit. FadQeS
The permittee shall operate its approved pretreatment program in accordance with section
402(b)(8) of the Clean Water Act, the Federal Pretreatment Regulations 40 CFR Pan 403; the
State Pretreatment Regulations 15 NCAC 2H .0900, and the legal authorities, policies, ri���
procedures, and financial provisions contained in its pretreatment program submission. ew�
ppGration.stPAinclude but is not limited to the implementation of the following conditions and P
requirements:
5"k
1. The permittee shall develop, in accordance with 40 CFR 403.5(c), specific limits to rVer JIoh
implement the prohibitions listed in 40 CFR 403.5(a) and (b). J�X
2. Within 120 days of the effective date of this permit the permittee shall draft and submit a
monitoring program for the collection of facility specific data to be used in a wastewater
treatment plant headworks analysis for the development of specific local pretreatment
standards as required by paragraph 1 above. The permittee shall modify and implement the
monitoring program based on comments received by the Division within 180 days of the
effective date of this permit.
3. 180 days prior to the expiration date of this permit the permittee shall submit a headworks
analysis based on the data collected via the monitoring program required by paragraph 2
above.
4. The pernninee shall issue permits for construction, operation and discharge to all significant
industrial users in accordance with NCGS 143-215.1. These permits shall contain
limitations, sampling protocols, reporting requirements, appropriate standard conditions,
and compliance schedules as necessary for the installation of control technologies to meet
applicable pretreatment standards and requirements. Prior to the issuance of a permit
to construct or as a condition of the permit an evaluation of the treatment process proposed
must be made as to its capacity to meet the permit limitations.
5. The permittee shall carry out inspection, surveillance, and monitoring requirements as
described in its approved pretreatment program in order to determine, independent of
information supplied by industrial users, compliance with applicable pretreatment
standards. The permittee must inspect all significant industrial users (S1Us) once per
calendar year and sample all SIUs at least twice per calendar yeyar, once during the period
beginning January 1 and ending June 30 and once during the period beginning July 1 and
ending December 31.

Pan III
Page 3 of 4
6. The permtittee shall enforce and obtain appropriate remedies for violations of categorical
pretreatment standards promulgated pursuant to section 307(b) and (c) of the Clean Water
Act (40 CFR 405 et.seq.), prohibitive discharge standards as set forth in 40 CFR 403.5,
and specific local limitations. All enforcement actions shall be consistent with any
Enforcement Response Plan approved by the Division.
7. The pemuttee shall require all industrial users to comply with the applicable monitoring and
reporting requirements outlined in the approved pretreatment program, the industry's
pretreatment permit, and/or in 15 NCAC 2H .0908.
8. The permittee shall submit twice per year 2 copies of a pretreatment report describing its
pretreatment activities over the previous six months. A report shall be submitted to the
Division by August 1 of each year describing pretreatment activities for January 1 through
June 30 of that year, and a like report shall be submitted by February 1 of each year for
activities conducted from July 1 through December 31 of the previous year. These reports
shall contain the following information: .
a. a narrative summary of actions taken by the permittee to ensure compliance with
pretreatment requirements and standards
b. a list of any substantive changes made in the approved pretreatment program
c. a compliance status summary of all significant industrial users
d. a list of those significant industrial users in reportable noncompliance with pretreatment
requirements and standards, the nature of the violations, and actions taken or proposed
to correct the violations on forms approved by the Division.
e. sampling and analytical results recorded on forms approved by the Division
f. upon request, other information which in the opinion of the Director is needed to
determine compliance with the pretreatment implementation requirements of this permit
g. a pretreatment program summary on forms approved by the Division.
9. The permittee shall retain for a minimum of three years records of monitoring activities and
results, along with support information including general records, water quality records,
and records of industrial impact on the POTW.
l0.The permittee shall publish annually, pursuant to 40 CFR 403.8 (f) (2) (vii), a list of
significant industrial users that have significantly violated pretreatment requirements and
standards during the previous twelve month period.
11.The permittee shall maintain adequate funding and staffing levels to accomplish the
objectives of its approved pretreatment program.
12. The perminee shall maintain adequate legal authority to implement its approved pretreatment
program.
13. The perrrtinee shall update its industrial user survey at least once every five years.
14. Modifications to, the approved pretreatment program including but not limited to local limits
modifications and monitoring program changes shall be considered permit modifications
and shall be governed by 15A NCAC 2H .0114 and 15A NCAC 2H .0907. 1

Pan III
Page 4 of 4
No construction of wastewater treatment facilities or additions to add to the plants treatment
capacity or to change the type of process utilized at the treatment plant shall be begun until Final
Plans and Specifications have been submitted to the Division of Environmental Management
and written approval and Authorization to Construct has been issued.
D. Groundwater Monitoring
The permittee shall, upon written notice from the Director of the Division of Environmental
Management,conduct groundwater monitoring as may be required to determine the compliance
of this NPDES permitted facility with the current groundwater standards.
i . • . . ��� i . .
All POTWs must provide adequate notice to the Director of the following:
1. Any new introduction of pollutants into the POTW from an indirect discharger which
would be subject to section 301 or 306 of CWA if it were directly discharging those
pollutants; and
2. Any substantial change in the volume or character of pollutants being introduced into that
POTW by a source introducing pollutants into the POTW at the time of issuance of the
permit.
3. For purposes of this paragraph, adequate notice shall include information on (1) the quality
and quantity of effluent introduced into the POTW, and (2) any anticipated impact of the
change on the quantity or quality of effluent to be discharged from the POTIN.