NC0032719_Permit Issuance_19980203

NPDES DOCUHENT 5CANNIN` COVER SHEET
NC0032719
Valhalla WTP
NPDES Permit:
Document Type:
Permit Issuance
x
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Staff Comments
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
February 3, 1998
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State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Wayne McDevitt, Secretary
A. Preston Howard, Jr., P.E., Director
February 3, 1998
Mr. Tom Bulls
Chowan County Water
Post Office Box 1030
Edenton, North Carolina 27932
Subject: NPDES Permit Issuance
Permit No. NC0032719
Valhalla Water Treatment Plant
Chowan County
Dear Mr. Bulls:
In accordance with the application for a discharge permit received on August 25, 1997, the Division is
forwarding herewith the subject NPDES permit. This permit is issued pursuant to the requirements of North
Carolina General Statute 143-215.1 and the Memorandum of Agreement between North Carolina and the U.S.
Environmental Protection Agency dated December 6, 1983.
On October 16,1997, Washington Regional Office staff conducted a site visit which indicated that the
settling lagoon at the plant is nearly filled to capacity with sludge. Although Chowan County is aware of the
problem, the Division emphasizes the importance of remediating this problem especially because the Valhalla Plant
has recently been modified to double capacity. In addition, please note the following: settleable solids is to be
monitored at the effluent, turbidity is to be monitored instream, and the pH monitoring requirement has been
eliminated from the permit.
If any parts, measurement frequencies or sampling requirements contained in this permit are unacceptable to
you, you have the right to an adjudicatory hearing upon written request within thirty (30) days following receipt of
this letter. This request must be in the form of a written petition, conforming to Chapter 150B of the North Carolina
General Statutes, and filed with the Office of Administrative Hearings, Post Office Drawer 27447, Raleigh, North
Carolina 27611-7447. Unless such demand is made, this decision shall be final and binding.
Please take note that this permit is not transferable. Part II, E.4. addresses the requirements to be followed
in case of change in ownership or control of this discharge.
This permit does not affect the legal requirements to obtain other permits which may be required by the
Division of Water Quality or permits required by the Division of Land Resources or any other Federal or Local
governmental permit that may be required.
If you have any questions concerning this permit, please contact Paul B. Clark at telephone number
[phone], extension 580.
Since ely,
Preston Howard, Jr.,
cc: Central Files
Washington Regional Office, Water Quality Section
Mr. Roosevelt Childress, EPA
NPDES Unit
Point Source Compliance/Enforcement Unit
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone] FAX [phone]
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Permit No. NC0032719
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provision of North Carolina General Statute 143-215.1, other lawful standards
and regulations promulgated and adopted by the North Carolina Environmental Management
Commission, and the Federal Water Pollution Control Act, as amended,
Chowan County Water Department
is hereby authorized to discharge wastewater from a facility located at
Valhalla Water Plant
intersection of NC Highway 32 & NCSR 1222
north of Valhalla
Chowan County
to receiving waters designated as an unnamed tributary to Rockyhock Creek in the Chowan River Basin
in accordance with effluent limitations, monitoring requirements, and other conditions set forth in Parts I,
II, III, and IV hereof.
The permit shall become effective March 1, 1998
This permit and the authorization to discharge shall expire at midnight on January 31, 2003
Signed this day February 3, 1998
. Preston Howard, Jr., P ., Director
Division of Water Quality
By Authority of the Environmental Management Commission

5
SUPPLEMENT TO PERMIT COVER SHEET
Chowan County Water Department
is hereby authorized to:
•
Permit No. NC0032719
1. Continue to discharge from a facility (with a pond for solids settling) located at Valhalla
Water Plant, intersection of NC Highway 32 & NCSR 1222, north of Valhalla, Chowan
County (See Part III of this permit), and
2. Discharge filter backwash and softener backwash from said treatment works at the location
specified on the attached map into an unnamed tributary to Rockyhock Creek (Class B-NSW)
in the Chowan River Basin.

A. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
Permit No. NC0032719
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is authorized to discharge from outfall(s) serial number
001. Such discharges shall be limited and monitored by the Permittee as specified below:
EFFLUENT CHARACTERISTICS
LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
Location'
Flow
Weekly
Instantaneous
E
Total Suspended Solids
30.0 mg/I
45.0 mg/I
2/month
Composite
E
Settleable Solids
0.1 mVi
0.2 ml/I
Weekly
Grab
E
Turbidity
`
Weekly
Grab
U,D
Iron
Weekly
Grab
E
Total Residual Chlorine
Weekly
Grab
E
Chloride
Weekly
Grab
E
Notes:
1 Sample locations: E - Effluent, U - Upstream, D - Downstream.
2 The discharge shall not cause the turbidity of the receiving water to exceed 50 NTU. If the turbidity exceeds these levels due to natural background
conditions, the discharge level cannot cause any increase in the turbidity in the receiving water.
All samples collected should be of a representative discharge.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

NC0032719 Summary
November 10, 1997
Chowan County -Valhalla WTP has applied to renew their permit to discharge backwash
water to an unnamed tributary to Rockyhock Creek (B-NSW) in the Chowan River basin
(030104).
The WTP has three filters which are backwashed every day and two softeners which are
backwashed every other day. The treatment system consists of a solids settling pond
which rarely discharges. However, the pond is filling with solids and should be dredged
in the near future to avoid a potential problem (M. Starr - staff report 971016).
Compliance Summary
Effluent data reviewed from January 1995 through August 1997 indicated no violations.
However, the facility is not monitoring for settleable solids at the effluent and is monitoring
for turbidity at the effluent not instream as is required in the permit.
WLA Summary
Permit will be renewed with the same standard WTP monitoring requirements.
A prior staff report prepared by Lyn Hardison stated that there are high iron and manganese
levels in the groundwater. Iron monitoring is required in the permit. Manganese has a
water quality standard only in water supply waters, thus manganese monitoring will not be
required.
Note: The Valhalla WTP is doubling their capacity and thus, the Brahall WTP will only be
used during periods of peak flow (M. Starr - phone conversation w/ P. Clark 971021).
Page 1 of 1

To: Permits and Engineering Unit SOC Priority Project: Yes No X
Water Quality Section If "Yes," SOC No.
Attn: Paul Clark
NPDES Group
Date: October 27, 1997
NPDES STAFF REPORT AND RECOMMENDATION
Chowan County
Permit No. NC0032719
PART I - GENERAL INFORMATION
1. Facility and Address:
Valhalla Water Treatment Plant
P. O. Box 1030
Edenton, NC 279232
2. Date of Investigation: October 16, 1997
3. Report Prepared by: Mark A. Starr
4. Person(s) Contacted and Telephone Number(s):
Tom Bulls, ORC, [phone]
5. Directions to Site:
Located on Highway 32, Approximately 1/2 mile north of the intersection of SR 1222 & HWY 32.
6. Discharge Point(s), List for all discharge points:
Latitude: 36° 08' 29" N Longitude: 76° 39' 22" W
Attach USGS map extract and indicate treatment facility site and discharge point on map.
USGS Quad No. USGS Quad Name: Valhalla
7. Site size and expansion area consistent with application? Yes X No _ If "No," explain:
8. Topography (relationship to flood plain included)
Site is flat and approximately 10 feet above MSL.
9. Location of nearest dwelling:
Nearest dwelling is approximately 250 feet away from site.
NggEtk
OCT 301991
POINT SOURCE BRANCH

10. Receiving stream or affected surface waters: Unnamed Tributary to Rockyhock Creek
a. Classification: B NSW
b. River Basin and Subbasin No.: 03-01-04
c. Describe receiving stream features and pertinent downstream uses:
Settling Pond rarely discharges due to the hydrology of the site. Discharge actually goes into
Bennett Millpond, a small body of water formed by the damming of Rockyhock Creek.
PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. a. Volume of Wastewater to be Permitted: 0.055 MGD (Ultimate Design Capacity)
b. Current permitted capacity: no limit on flow in permit
c. Actual Treatment Capacity: 0.055 MGD (Current Design Capacity)
d. Date(s) and construction allowed by Authorizations to Construct issued in past two years:
not applicable
e. Description of existing or substantially constructed wastewater treatment facilities:
Pond is used to settle solids. Wastewater is rarely discharged into UT.
f. Description of proposed wastewater treatment facilities:
not applicable
g. Possible toxic impacts to surface waters: unknown
h. Pretreatment Program (POTWs only):
In development Approved
Should be required Not needed X
2. Residuals Handling and Utilization/Disposal Scheme
a. If residuals are being land applied, specify DEM permit number:
Residuals Contractor:
Telephone Number:
b. Residuals Stabilization: PSRP _ PFRP _ Other
c. Landfill:
d. Other disposal/utilization scheme (specify):
Solids have never been removed from the pond. Pond is nearing capacity.
3. Treatment Plant Classification (attach completed rating sheet): Class I
4. SIC Code(s): 4952
Wastewater Code(s): Primary 22 Secondary 00
Main Treatment Unit Code: n/a
•
NPDES Permit Staff Report
Version 10/92 Page 2

PART III - OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction Grant Funds or are any public monies involved
(municipals only)? No
2. Special monitoring or limitations (including toxicity) requests: None
3. Important SOC, JOC, or Compliance Schedule dates (indicate):
Activity Date
Submission of Plans and. Specifications
Begin Construction
Complete Construction
4. Alternatives Analysis Evaluation: Has the facility evaluated all of the non -discharge options available?
Provide Regional perspective for each option evaluated.
Spray Irrigation: not feasible
Connection to Regional Sewer System: not feasible
Subsurface Disposal: not feasible
Other Disposal Options: n/a
5. Other Special Items:
PART IV - EVALUATION AND RECOMMENDATIONS
An inspection was conducted at the Valhalla Water Treatment Plant. The results of the inspection
indicate that the plant was in compliance with the limitations and conditions of the permit. In general, the plant
is well maintained. The settling lagoon at the plant, however, is nearly filled to capacity with sludge. The
Chowan County Water Department is aware of the problem, and a sludge disposal plan will be put in effect as
soon as possible. It is of the utmost importance that sludge is cleared from the lagoon since the Valhalla Plant
has recently been modified to double capacity, which will double sludge production. Currently the settling
lagoon rarely discharges into surface waters, with the doubling of wastewater production, it is likely that
discharges will occur more frequently. The effluent appeared clear and free of visible solids. A cursory review
of data generation and tracking, sampling practices, and self -monitoring data revealed no discrepancies. It is
the recommendation of the Washington Regional Office that the , - •, i ' . renewed.
Ignature o report 'reparer
Water Quality Regional Supervisor
Date
NPDES Permit Staff Report
Version 10/92 Page 3

RATING SCALE FOR CLASSIFICATION OF WATER POLLUTION CONTROL SYSTEMS
Name of Facility: p ��-yt j Coviv/yWI4iLe
Owner or Contact Person: 7L c />`'I f /%5
• Mailing Address: P 0£ ox j0 3 Q cociutoov 1 Ale- ?-79.3 a
County: Q, L%owmj Telephone: VI' — 41 P- ?
Present Classification: / 5�7%
New Facility Existing Facility=
NPDES Per. No. NCO() 3?-?l9 Nondisc. Per. No.WQ
Rated by: NI S1Q.�L Health Dept.Per No.,_
Reviewed by: Telephone: co' -9 y1-Val Date: to4-% 17
Health Dept. Telephone:
Regional Office Telephone: /if ?vC 6 1/2 /f7
m � v1lS Central Office Telephone:
ORC: Grade: t/wc// Telephone: Y82--7977
Check Classification(s): ___ Subsurface Spray Irrigation Application
(Circle One)p y g Land
Wastewater Classification:pp
� It Ili IV Total Points:
IN -PLANT PROCESSES AND RELATED CONTROL EOUIPMENT WHICH AFIE AN INTEGRAL PART OF INDUSTRIAt PRODUCTION SHALL NOT BE
CONSIDERED WASTE TREATMENT FOR THE PURPOSE OF CLASSIFICATION. ALSO SEPTIC TANK SYSTEMS CONSISTING ONLY OF SEPTIC TAW
AND GRAVITY NITRIFICATION LINES ARE EXEMPT FROM CLASSIFICATION.
SUBSURFACE CLASSIFICATION
(check all units that apply)
1 •_septic tanks
2. pump tanks
3. siphon or pump -dosing systems
4. sand filters
5•grease trap/interceptor
6 oil/water separators
7. gravity subsurface treatment and disposal:
8•__pressure subsurface treatment and disposal:
SPRAY IRR GATION CL.ASSIFiCATION
(check ail units that apply)
1preliminary treatment (definition no. 32 )
2.lagoons
3. septic tanks
4._pump tanks
5. pumps
6.sand filters
7. grease trap/interceptor
8. oil/water separators
9. disinfection
10. chemical addition for nutrient/algae control
11.rspray irrigation of wastewater
In addition to the above classifications, pretreatment of wastewater In excess of these components shall
be rated using the point rating system and will require an operator with an appropriate dual certification.
LAND APPLICATION/RESIDUALS CLASSIFICATION (Applies only to permit holder)
1 • Land application of biosolids, residuals or contaminated soils on a designated site.
WASTEWATER TREATMENT FACILITY CLASSIFICATION
The following systems shall be assigned a Class I classification, unless the flow is of a significant quantity or the technology is unusually
complex, to require consideration by the Commission on a case -by -case basis: (Check if Appropriate)
1 OiVwater Separator Systems consisting only of physical separation, pumps and disposal;
2. Septic Tank/Sand Fitter Systems consisting only of septic tanks, dosing apparatus, pumps,sand filters, disinfection
and direct discharge;
3. Lagoon Systems consisting only of preliminary treatment, lagoons, pumps, disinfection, necessary chemical treatment for
algae or nutrient control, and direct discharge;
4•Closed-loop Recycle Systems;
5•..�.___Groundwater Remediation Systems consisting only of oil/water separators, pumps, air -stripping, carbon adsorption, disinfection
and disposal;
6• quaculture operations with discharge to surface waters;
7. V Water Plant sludge handling and back -wash water tre
atment;
8• Seafood processing consisting of screening and disposal.
9•Single-family discharging systems, with the exception of Aerobic Treatment Units, will be classified if permitted after July 1.
1993 or If upon Inspection by the Division, it is found that the system is not being adequately operated or maintained. Such
systems will be notified of the classification or reclassification by the Commission, in writing.

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ROAD CLASSIFICATION
PRIMARY HIGHWAY
HARD SURFACE
LIGHT -DUTY ROAD. HARD OR
IMPROVED SURFACE
SECONDARY HIGHWAY
HARD SURFACE =IMO UNIMPROVED ROAD = =
Latitude 36°05'21 " Longitude 76°32'23"
Map # C32NW Sub -basin 30104
Stream Class
B-NSW
Discharge Codes 02 22
Receiving Stream UT to Rockvhock Creek
Design Q moo MGD Permit expires 01 /31 /03
SCALE 1:24 000
1 MILE
7000 FEET
1
0
1 KILOMETER
CONTOUR INTERVAL 2 METERS
Chowan County Water Dept.
NC003271 9
Valhalla WTP
Chowan County