NC0077992_Permit Modification_20080415

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April 15, 2008
Carl Classen, Interim County Manager
Hyde County Water System
P.O. Box 66
Swan Quarter, North Carolina 27885
Michael F. Easley, Governor
State of North Carolina
William G. Ross, Jr., Secretary
Department of Environment and Natural Resources
Coleen H. Sullins Director
Division of Water Quality
Subject: Modification to Increase Discharge Flow
NPDES Permit NC0077992
Ponzer Water Treatment Plant (WTP)
Hyde County
Dear Mr. Classen:
The Division of Water Quality (the Division) has reviewed and approved your application to
modify the permit for the subject facility. Please add the attached change -pages to your existing
permit and discard the old pages.
The Division understands that you will continue to generate Reverse Osmosis (RO) reject water
in your production of potable water, but in the interest of protecting receiving -stream water
quality, you intend to dilute the effluent with untreated groundwater at a ratio of 1.4 to 1.0
(groundwater to wastewater) prior to discharge. The Division concurs, and we have therefore
increased your permitted discharge flow limit from 0.108 MGD to 0.225 MGD. Because this
flow increase does not include additional wasteload to the receiving stream, the Division
considers this a minor permit modification that will not require Public Notice. This modification
is therefore effective immediately.
Please notice that this permit is not transferable except after notifying the Division of Water
Quality. The Division may modify, or revoke and reissue this permit. This permit does not affect
your legal requirements to obtain other permits from the Division of Water Quality, the Division
of Land Resources, the Coastal Area Management Act, or other federal or local governments.
If you have questions concerning this permit modification, please contact Joe Corporon at (919)
733-5083, extension 597 or email [e-mail].
Sincerely,
Coleen H. Sullins
Enclosure: Permit NC0077992 - Modification Changes Pages
cc: Washington Regional Office, Surface Water Protection
NPDES Program
Aquatic Toxicology Unit
North Carolina Division of Water Quality
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
joe.corooron(nc nail.net - [phone] x597
FAX [phone]
On the Internet at http://h2o.enr.state.nc.us/

Permit Number: NC0077992
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
(NPDES)
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,
Hyde County Water System
is hereby authorized to discharge wastewater from a facility located at
Ponzer Water Treatment Plant
4595 NC 45, Pantego,
Hyde County
to receiving waters designated as Unnamed Tributary to Pungo Lake Canal in the Tar -Pamlico
River Basin in accordance with effluent limitations, monitoring requirements, and other
conditions set forth in Parts I, II, III and IV hereof. •
This permit modification shall become effective April 15, 2008.
This permit and authorization to discharge shall expire at midnight on November 30, 2009.
Signed this day April 15, 2008.
4r1 Coleen H. Sullins, Director
Division of Water Quality
By Authority of the Environmental Management Commission

Permit Number: NC0077992
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether for operation or discharge are
hereby revoked. As of this permit issuance, any previously issued permit bearing this number is
no longer effective. Therefore, the exclusive authority to operate and discharge from this facility
arises under the permit conditions, requirements, terms, and provisions included herein.
Hyde County Water System
is hereby authorized to:
1. continue to operate a reverse osmosis (RO) water treatment system; filter reject
wastewater to be diluted with non -treated groundwater at a ratio of 1.4 to 1.0
(groundwater to wastewater),
located at the Ponzer Water Treatment Plant, 4595 NC HWY 45, Ponzer, Hyde County,
and,
2. discharge from said treatment works at a specified location (see attached map) through
Outfall 001 into an Unnamed Tributary to Pungo Lake Canal, a waterbody classified
as C-Sw NSW, located within the Tar -Pamlico River Basin.

Permit Number: NC0077992
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
During the period beginning on the effective date of the permit and lasting until expiration, the
Permittee is authorized to discharge RO Reject wastewater from outfall(s) 001. Such
discharges shall be limited and monitored by the Permittee as specified below:
EFFLUENT .: , .. .
CHARACTERISTICS .
A
LIMITS i =
....MONITORING REQUIREMENTS_.. _..
Monthly-
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
Location
Flow
0.225 MGD
Weekly
Instantaneous
Effluent
Temperature
Monthly
Grab •
Effluent
Salinity
Monthly
Grab
Effluent
Conductivity
Monthly
Grab
Effluent
pH l
Monthly
Grab
Effluent
Dissolved Oxygen
Monthly
Grab
Effluent
Total Dissolved Solids
Monthly
Grab
Effluent
Total Copper
Monthly
Grab
Effluent
Total Fluoride
1.8 mg/1
Monthly
Grab
Effluent
Total Zinc
Monthly
Grab
Effluent
Ammonia Nitrogen
Quarterly
Grab
Effluent
Total Nitrogen
Quarterly
Grab
Effluent
Total Phosphorus
Quarterly
Grab
Effluent
Whole Effluent Toxicity 2
Quarterly
Grab
Effluent
Footnotes:
1. Effluent pH shall fall below 6.0 nor exceed 9.0 Standard Units.
2. Whole Effluent Toxicity (Ceriodaphnia) at 90%: March, June, September
and December [see Part A. (2.)].

Permit Number: NC0077992
A. (2.) CHRONIC TOXICITY MONITORING (QRTRLY)
The Permittee shall conduct quarterly chronic toxicity tests using test procedures outlined in the "North
Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised February 1998, or subsequent
versions.
The effluent concentration defined as treatment two in the procedure document is 90%. The permit holder
shall perform quarterly monitoring using this procedure to establish compliance with the permit
condition. The tests will be performed during the months of March, June, September and December.
Effluent sampling for this testing shall be performed at the NPDES permitted final effluent discharge
below all treatment processes.
All toxicity testing results required as part of this permit condition will be entered on the Effluent
Discharge Monitoring Form (MR-1) for the month in which it was performed, using the parameter code
TGP3B. Additionally, DWQ Form AT-1 (original) is to be sent to the following address:
Attention: North Carolina Division of Water Quality
Environmental Sciences Section
1621 Mail Service Center
Raleigh, N.C. 27699-1621
Completed Aquatic Toxicity Test Forms shall be filed with the Environmental Sciences Section no later
than 30 days after the end of the reporting period for which the report is made.
Test data shall be complete and accurate and include all supporting chemical/physical measurements
performed in association with the toxicity tests, as well as all dose/response data. Total residual chlorine
of the effluent toxicity sample must be measured and reported if chlorine is employed for disinfection of
the waste stream.
Should there be no discharge of flow from the facility during a month in which toxicity monitoring is
required, the Permittee will complete the information located at the top of the aquatic toxicity (AT) test
form indicating the facility name, permit number, pipe number, county, and the month/year of the report
with the notation of "No Flow" in the comment area of the form. The report shall be submitted to the
Environmental Sciences Section at the address cited above.
Should the Permittee fail to monitor during a month in which toxicity monitoring is required, then
monthly monitoring will begin immediately. Upon submission of a valid test, this monthly test
requirement will revert to quarterly in the months specified above.
Should any test data from this monitoring requirement or tests performed by the North Carolina Division
of Water Quality indicate potential impacts to the receiving stream, this permit may be re -opened and
modified to include alternate monitoring requirements or limits.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control
organism survival, minimum control organism reproduction, and appropriate environmental controls,
shall constitute an invalid test and will require immediate follow-up testing to be completed no later than
the last day of the month following the month of the initial monitoring.

k • C
1Ve�S Engineers
&Associates,Inc. Planners
Since1418 Surveyors
December 27, 2007
Teresa Rodriguez
Environmental Engineer 11
NCDENR — Division of Water Quality — NPDES Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
SUBJECT: Hyde County Ponzer R/O Water Treatment Plant
Permit Modification Request for Discharge Blending
Permit # NC0077992
Rivers File: 27216 D
Dear Ms. Rodriquez:
r--
J A N 3 2008
Enclosed is one (1) copy of the following documents to serve as the NPDES Permit Modification
Request for the Ponzer R/O Water Treatment Plant for Hyde County, NC:
• NPDES Permit Revision / Application Form
• Waste Discharge Study prepared by Rivers & Associates, Inc., which includes:
- Lab reports from Oxford Labs, Inc.
- Discharge Analysis from Environment 1, Inc.
- Effluent Acute Toxicity Tests from Environment Testing Solutions, Inc.
• Ponzer Plant and System Layout.
In accordance with a previous discussion with you, we are submitting the Waste Discharge Study in
lieu of the EAA. The Study investigates and makes determinations as to the required blending to
achieve the desired discharge quality results. The discharge location will be unchanged from the
existing Ponzer Reverse Osmosis Water Treatment Plant. The discharge volume is proposed to be
increased to allow for adequate blending of raw water with the discharge water to produce a better
quality effluent which meets required and/or preferred limits. The enclosed study demonstrates that an
overall improvement in the discharge water quality will result from the proposed discharge revision;
therefore we are requesting that the permit be revised to accommodate the proposed discharge volume.
In accordance with the fee schedule posted on the NPDES website, no fee has been included since this
is a minor permit modification request.
If you have any questions or if you need any additional information; please advise.
Very truly yours,
RIVERS & ASSOCIATES, INC
c::,,__,
T. Andy Lamm,
Project Manag
Enclosures
Cc: Carl Classen, Hyde County (w/o enclosures)
Clint Berry, Hyde County (w/o enclosures)
File (w/ enclosures)
6131 Falls of Neuse Road, Suite 300 • Raleigh, NC 27609 • [phone] • FAX [phone]
Email: [e-mail]

Ponzer WTP
PLANT LAYOUT
OPERATORS ROOM
FROM WELLS
ANTISCALANT
ACID

Ponzer WTP
CLEARWELL
WELL NO. 2
System Layout
AERATOR
WTP
TO DISTRIBUTION
SYSTEM
0
WELL NO. 1