NC0007552_STAFF REPORT_19920810

NPDES DOCUMENT SCANNIM& COVER SHEET
NPDES Permit: NC0007552
Document Type: Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Speculative Limits
Staff Report
Instream Assessment (67B)
Environmental Assessment (EA)
Permit
History
Document Date: August 10, 1992
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To: Permits and Engineering Unit ,
Water Quality Section . AUG 1 0 1992
TECHNICAL SUPPORT BRANCH
Date: August 6, 1992
NPDES STAFF REPORT AND RECOMMENDATION t,4
Chowan County
Permit No. NC0007552
PART I -- GENERAL INFORMATION
1 . Facility and Address: Edenton Water Treatment Plts
P. O. Box 300
Edenton, NC 27932
2 . Date of Investigation:
August 4 , 1992
3 . Report Prepared by: Lyn Hardison
4 . Person (s) Contacted and Telephone Number(s) :
Milton Flynn, Operator 919/482-4414
Jimmy Patterson, Operator
William Crummey, Director of Utilities
5 . Directions to Site:
Pipe 001 - Located on West Free Mason St. in Edenton
Pipe 002 - Located off Albemarle Rd in Edenton
(Beaver Hill)
6 . Discharge Point (s) , List for all discharge points:
Pipe 001 Pipe 002
Latitude: 36003151/1 Latitude: 36003159/1
Longitude: 76036148/1 Longitude: 76036052/1
Attach a USGS map extract and indicate treatment
facility site and discharge point on map.
U. S.G. S. Quad Name Edenton
7 . Size (land available for expansion and upgrading) :
Discharge 001: approx. one acre
Discharge 002 : approx. one-half acre
8 . Topography (relationship to flood plain included)
Flat

9 . Location of nearest dwelling:
Pipe 001: nearest dwelling is approx. 100 ft
Pipe 002 : nearest dwelling is approx. 250 ft =
10 . Receiving stream or affected surface waters:
Both points of discharge empty into Filbert Creek
which is a tributary -6 Pembroke-Creek
a. Classification: "B" (NSW)
b. River Basin and Subbasin No. : Chowan
03-01-04
C. Describe receiving stream features and pertinent
downstream uses: drainage at point of discharges,
however downstream uses include swimming
PART 11 -- DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1 . Type of wastewater: 100% Industrial
a. Volume of Wastewater: 0. 02 MGD (Design
Capacity) approx. 10, 000 gpd from each WTP
b. Types and quantities of industrial wastewater:
Water plants filter backwash and regeneration of
Zeolite softeners
C. Prevalent toxic constituents in wastewater:
none known
2 . Description of industrial process (industries only)
and applicable CFR Part and Subpart:
N/A
3 . Type of treatment (specify whether proposed or
existing) : None
4 . Sludge handling and disposal scheme: N/A
5 . Treatment plant classification: (Less than 5 points --
no rating; include rating sheet, if appropriate) .
N/A
6 . SIC Code(s) : 4952
Wastewater Code(s) : Primary 22
Main Treatment Unit (s) : N/A
PART III --- OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction
Grant Funds (municipals only) ? No
2 . Special monitoring requests: Same as existing permit

2 . Special monitoring requests: Weekly effluent
monitoring of chloride and salinity from pipe 001
and pipe 002 as well as an upstream and downstream
monitoring.
3 . Additional effluent limits requested:
,4 . Other:
PART IV -- EVALUATION AND RECOMMENDATIONS
Town of Edenton has two (2) water treatment plants. Each
plant will discharge approximately 10, 000 gallons per day,
therefore there will be a total of . 02 MGD (20, 000 GPD)
discharged from both plants into Filbert Creek. Discharge
001 is located on West Mason Street and Discharge 002 is
located off Ablemarle St. Even though the discharge
points are not at the same location, the receiving stream
is the same. The discharge points are marked on the map
provided.
The water plant softeners are regenerated with approx 800
gals of brine on a daily average. The Washington Regional
office has concerns that the effluent may contain high
chlorides and salinity values. The receiving stream is
classified as Class "B-NSW" waters. Please note that
freshwater under natural conditions would have a chloride
ion content of 500mg/1 or less. If the effluent should
happen to contain high chlorides and salinity values, the
natural environment of the receiving stream and
aquatic life could be affected.
It is recommended to re-issue NPDES permit NCO007552 to
The Town of Edenton including the monitoring request
mentioned above.
Sig, / ure of report preparer
Ak 7-
Water Quality Regional S ervisdr
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