NC0086291_Permit Issuance_20071214

C~� NATF�
Michael F. Easley, Governor
O� Q
G
State of North Carolina
—
William G. Ross, Jr., Secretary
Resources
.0..
Department of Environment and Natural
Coleen H. Sullins, Director
Division of Water Quality
December 14, 2007
Ms. Anne Marie Knighton, Town Manager
Town of Edenton
P.O. Box 300
Edenton, North Carolina 27932
Subject: Issuance of NPDES Permit NCO086291
Beaver Hill WTP
Chowan County
Dear Ms. Knighton:
The Division of Water Quality (the Division) hereby transmits your NPDES permit for the subject site.
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 May 9, 1994, or as subsequently amended.
For renewal, the Division has revised your limits and monitoring condition in accordance with the new
statewide NPDES Permitting Strategies For Potable Water Treatment Plants, August 2007. Additional
parameters include:
Total Dissolved Solids
Temperature
Salinity
Conductivity
Dissolved Oxygen
Ammonia Nitrogen (NH3 as N)
Total Copper
Total Lead
Total Manganese
Total Nitrogen
Total Phosphorus
Whole Effluent Toxicity (WET) Testing —
Quarterly monitoring only
If any parts, measurement frequencies, or sampling requirements contained in this permit are
unacceptable, you have the right to an adjudicatory hearing upon written request within thirty (30) days
after receiving this letter. Your request must be in the form of a written petition conforming to Chapter
150B of the North Carolina General Statutes, and must be filed with the office of Administrative
Hearings, 6714 Mail Service Center, Raleigh, North Carolina 27699-6714. Unless such a demand is made,
this permit shall be final and binding.
A��
NCDENR
North Carolina Division of Water Quality 1617 Mail Service Center Raleigh, NC 27699-1617 [phone] Customer Service
1800 623-7748

Town of Edenton
Beaver Hill WTP
Issuance of NPDES Permit NC0086291
Page 2 of 2
This permit is not transferable except after notifying the Division of Water Quality. The Division may
require modification, or revocation and re -issuance of this permit. Please notice that this permit does not
affect your legal obligation to obtain other permits required by 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, or if we can be of further service, please contact Joe Corporon at
[[e-mail] or call [phone], extension 597.
Respectfully,
r�y,w.
Coleen H. Sullins
Enclosure: NPDES Permit NCOO96291
cc: Central Files
Wilmington Regional Office, Water Quality Section
NPDES Program
Aouatic Toxicology Unit
Chris Thompson (The Wooten Company . 120 N. Bovan Ave. Raleigh 27603-1423

Permit No. NCO086291
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
ID-ERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
PDES
In compliance with the provisions 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, the
Town of Edenton
is hereby authorized to discharge wastewater from a facility located at the
Beaver Hill Water Treatment Plant
Dr. Martin Luther King, Jr. Avenue
Chowan County
to receiving waters designated as Filbert 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.
This permit shall become effective January 1, 2008.
This permit and authorization to discharge shall expire at midnight on November 30, 2012.
Signed this day December 14, 2007.
w
<'Coleen H. Sullins, Director
Division of Water Quality
By Authority of the Environmental Management Commission

Permit No. NC0086291
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.
The Town of Edenton
is hereby authorized to:
1. continue to operate an ion -exchange potable water treatment system with discharge of filter
backwash, located at the Beaver Hill Water Treatment Plant, Dr. Martin Luther King, Jr.
Avenue, Edenton, in Chowan County, and
2. discharge from said treatment works, at the locations specified on the attached map, into Filbert
Creek, a waterbody classified B-NSW within the Chowan River Basin.

US HWY 17 Byp r
.ttl l6' r
,
Facility Location and
C Outfall 001
(flows south)
4
U' t Filbert Creek
y s �
a#
Queen Anne Creek m
—, —� USHWY17 . K
_ ; t
f
Z�
E,O
E Nf T O
N j
- -uw ` - -+► -s- w. ...
j
A
Town of Edenton
Beaver Hill Water Treatment Plant
Receiving Stream: Filbert Creek Stream Class: B-NSW
Drainage Basin: Chowan River Basin Sub -Basin: 03-01-04
Latitude: 360 03' 59" N Longitude: 76° 36' 52" W
State Grid/Ouad: C 32 SE / Edenton, NC
Facility x .
Location
not to scale
NPDES Permit NCO086291
North Chowan County
1

Permit No. NCO086291
A. (1). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
During the period beginning upon the effective date of the permit and lasting until expiration, the
Permittee is authorized to discharge from Outfall 001. Such discharges shall be limited and monitored
by the Permittee as specified below:
Saar+.wrww. .
{
3q�d, .d,-i�Jj AN r(•%q\�Sf h�
���..t����' '' 1._� . � <? .�����5�� .
�. ., s . Y ,�
F01:4
4.ri ^ .3...., •4• +i Z:V ,fuu
� . tgj J'�� .`" 1f�:r 1
' °�agey �: a ;age: ��� •� �
� v ' 9'S +1•it `x
i sew►• 1^ ,.3s y.-a...w, . ' a ' i •
lit%�'•; / -
``rt xrrequ,�en�. � � ; � rho . �o,..
Total Flow
0.010 MGD
2/Month
Instantaneous
E
Total Suspended Solids
30.0 m
45.0 m
2/Month
Grab
E
Total Residual Chlorine
28
2/Month
Grab
E
Total Dissolved Solids
1/Month
Grab
E
Temperature
1/Month
Grab
E, U, D
Salim
1/Month
Grab
E, U, D
Conductivity
1/Month
Grab
E, U, D
Dissolved Oxygen
l/Month
Grab
E, U, D
pH 3
1/Month
Grab
E, U, D
Ammonia Nitrogen
(NH3 as
1/Month
Grab
E
Fluoride
1/Month
Grab
E
Total Chloride
l/Month
Grab
E
Total Copper
1/Month
Grab
E
Total Iron
1/Month
Grab
E
Total Lead
l/Month
Grab
E
Total Manganese
l/Month
Grab
E
Total Zinc
1/Month
Grab
E
Total Nitrogen
1/ uarter
Composite
E
Total Phosphorus
1/ uarter
Composite
E
Whole Effluent Toxicity
Monitoring 5
1/Quarter'
Composite
E
Notes:
1 Sample locations: E = Effluent; U = 50 ft upstream; D =100 feet downstream.
2 In addition to Total Flow, the Permittee shall report the instantaneous flow rate and the duration of
the discharge.
3 pH shall not fall below 6.0 or exceed 9.0 standard units.
4 Zinc shall be monitored if the Permittee uses any zinc -based additive in the water treatment process.
5 WET Monitoring: P/F Ceriodaphnia Chronic @ 90 % - monitor only during the months of
January, April, July, and October [See Section A. (2.)].
Units: mg/L = milligrams per liter µg/L = micrograms per liter
The Permittee shall discharge no floating solids or foam visible in other than trace amounts.

Permit No. NCO086291
A. (2). CHRONIC TOXICITY (QUARTERLY) - MONITORING ONLY
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 January, April, July, and October.
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 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.

NPDES PERMIT
DRAFT & FINAL
CHECK LIST
FILE CONTENTS: FaciliTy -DJW C P eJaAltvt -,�VAW ka�y( -WTT
Permit No.O10/��
Leff side:
BIMS Tracking Slip
LT This Check List
NPDES Permit Writer: '
Rig t side:
Streamline Package Sheet
(to region, only if streamlin�ap,'.eejffluent
p� Draft Permit Cover Letter.
(add new policy text; su ajor chan s to permit)
[9� Draft Permit
(order: cover, supple s ets, special conditions)
Facility Map
(E-Map: include facility Outfalls; U and sample locations)
l� Fact Sheet., cr_P(Drk'�l
(Documents permit writer's re -issuance logic; RPA data attached (?)
L>d� Permit Writer's Notes
(if not in Facts Sheet - chronology, strategy, DMR Review, RPA, etc.)
❑ Staff Report from Region
(as appropriate - not needed if expedited)
Pr Old Permit
(Text, Effluent Sheets and Special Conditions)
l3'*� Permit Application.
(New Permit or Renewal; any additional permittee correspondence)
I� Acknowledgement Letter
(NPDES Unit written response to Renewal Application)
❑ Permittee Responses
(to acknowledgement letter, if any)
❑ Waste Load Allocation
(reference date; notes if recalculated for current action)
Note: Italics indicate special conditions not always required or applicable.
tQ /Submitted to 35AM04 kN1k 0F&r Peer Review: Date tr-W Admin cutoff date- t
2/peer Review completed by t)Cf _F ` Date
Updated Public Notice System [date] Updated BIMS Events: [date]
t/ Submitted for Public Notice one Newspaper Notice Received . Actual Notice date(s) T
ar'lDraft Permit [Maile / E-Mailed o (Regional Staff) 6D by Date 100 I
❑ Regional Office Review /Approval completed by Received on [Date] Additional Review by TO Ei3] .COSO) (rl � initiated by Date 9
6C17
❑ Additional Review/Approval completed by Date
❑ EPA Review Draft sent to initiated by Date
❑ EPA Review /Approval [mail / E-mail] completed by �f Date Received
* FINAL to Mike / Susan / Tom / Por signature on etter Dated r l�
❑ Additional Review [other] �{
O Final Files transferred to Server (Permits Folder) /F.( _ BIMS Final Updates: Events Limits
Version 8/14/2007

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The Daily Advance
215 S. Water Street
Elizabeth City, NC 27909
North Carolina
Pasquotank County
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Before the undersigned, a Notary Public of said County and State, duly pughi-t= sfi 'fb, Texlevu 11
commissioned, qualified and authorized by law to administer oaths, and dpplldatlon d1 R
NC6General-Sta�ut
personally appeared Maureen Brinson who being first duly sworn, deposes 14121 j6-P&IIcz Iaw3 i
and says that she Is the Manager of Accounting and Administration of the 92 500 and ;:;others; C
Daily Advance engaged In the publication of a newspaper known as The `, I�awfuii=5tandar'dsF = f
-Daily-Advance,-published,-Issued-and-entered-,as second -class-mail-In-the and re • u_ _,� :' thy'
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City of Elizabeth City In said County and State; Is authorized to make this 6ronir) f fal` mlisl rl°'
affidavit and sworn statement; that the notice or other legal advertisement, meat' :Comranius ! 0-
was published In the Daily Advance on the followingdates: TO s�fio issue, a; .
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advertisement was published was, at the time of each and every such lish , dafi8 .of this ;
publication, a newspaper meeting all of the requirements and qualifications of notice.
Section 1-597 of the General Statues of North Carolina and was a qualified j�ltten ,� comr ents:.
newspaper within the meaning of Section 1-597 of the General Statues of regarding. thg pTo-', s,
North Carolina. peose�ir"wlp
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THE
WOOTEN
COMPANY
ENGINEERING
»11aVnNC
ARCHITECTURE
120 North Boylan Avenue
Raleigh NC 27603-1423
919.828.0531
tax 919.834.3589
May 17, 2007
Mr. Gil Vinzani
Supervisor
NPDES Unit
Division of Water Quality
1617 Mail Service Center
Raleigh, NC 27699-1617
Re: Renewal of NPDES Permit No. NCO086291
Beaver Hill WTP, Town of Edenton
TWC No. 2478
Dear Mr. Vinzani:
MAY 78 2007 /1
if
\�
Enclosed please find three (3) copies an application for the renewal of NPDES Permit
No. NCO086291 submitted on behalf of the Town of Edenton. The application contains
the following documents:
1) Short Form C-WTP;
2) Location Map of Outfall 001;
3) Flow Schematic of Beaver Hill WTP; and
4) Copy of NPDES Permit No. NC0086291.
Please note that a Solids Handling Plan is not required for this WTP as no solids are
generated at the Plant. If you have any questions concerning this application or require
additional documentation, please contact me at your earliest convenience.
Sincerely,
Enclosures
cc: Jimmy Patterson, Town of Edenton
Anne -Marie Knighton, Town of Edenton

NPDES PERMIT APPLICATION - SHORT FORM C - WTP
For discharges associated with water treatment plants
Mail the complete application to:
N. C. Department of Environment and Natural Resources
Division of Water Quality / NPDES Unit
1617 Mail Service Center, Raleigh, NC 27699-1617
NPDES Permit Number INCO086291
If you are completing this form in computer use the TAB key or the up - down arrows to move from one
field to the next. To check the boxes, click your mouse on top of the box. Otherwise, please print or type.
1. Contact Information:
Owner Name Town of Edenton
Facility Name Beaver Hill WTP
Mailing Address PO Box 300
City Edenton
State / Zip Code NC/27932
Telephone Number [phone]
Fax Number [phone]
e-mail Address [e-mail]
2. Location of facility producing discharge:
Check here if same as above ❑
Street Address or State Road Dr. Matin Luther King Jr. Avenue
City Edenton
State / Zip Code NC/27932
County Chowan
3. Operator Information:
Name of the firm, consultant or other entity that operates the facility. (Note that this is not referring to the
Operator in Responsible Charge or ORC)
Name Town of Edenton
Mailing Address PO Box 300
City Edenton
State / Zip Code NC/27932
Telephone Number [phone]
Fax Number [phone]
4. Ownership Status:
Federal ❑ State ❑ Private ❑ Public
Page 1 of 3 C-WTP 03/05

NPDES PERMIT APPLICATION - SHORT FORM C - WTP
For discharges associated with water treatment plants
5. Type of treatment plant:
❑ Conventional (Includes coagulation, flocculation, and sedimentation, usually followed by
filtration and disinfection)
® Ion Exchange (Sodium Cycle Cationic ion exchange)
❑ Green Sand Filter (No sodium recharge)
❑ Membrane Technology (RO, nanoffltration)
Check here if the treatment process also uses a water softener ❑
b. Description of source water(s) (i.e. groundwater, surface water)
Groundwater
7. Describe the treatment process(es) for the raw water:
The groundwater is aerated, softened through ionic exchange, and then chlorinated prior
to distribution.
8. Describe the wastewater and the treatment processes) for wastewater generated by the
facility:
The wastewater is a solution of raw well water and sodium chloride brine used for the
backwash, regeneration, and rinse of the softeners. There is no treatment of the
wastewater prior to discharge.
9. Number of separate discharge points: 1
Outfall Identification number(s) 001
10. Frequency of discharge: Continuous ❑ Intermittent
If intermittent:
Days per week discharge occurs: -5 Duration: 45 minutes
11. Plant design potable flowrate 0.725 MGD
Backwash or reject flow .01.0 MGD
12. Name of receiving stream(s) (Provide a map showing the exact location of each outfall, including
latitude and longitude):
Filbert Creek (Pembroke Creek)
Page 2 of 4 C-WTP 03/05

NPDES PERMIT APPLICATION - SHORT FORM C - WTP
For discharges associated with water treatment plants
13. Please list all water treatment additives, including cleaning chemicals or disinfection
treatments, that have the potential to be discharged.
Brine
14. Is this facility located on Indian country? (check one)
Yes ❑ No
15. Additional Information:
➢ Provide a schematic of flow through the facility, include flow volumes at all points in
the treatment process, and point of addition of chemicals.
➢ Solids Handling Plan
16. NEW Applicants
Information needed in addition to items 1- 15.
➢ New applicants must contact a permit coordinator with the NCDENR Customer
Service Center.
Was the Customer Service Center contacted? ❑ Yes ❑ No
➢ Analyses of source water collected
➢ Engineering Alternative Analysis
➢ Discharges from Ion Exchange and Reverse Osmosis plants shall be evaluated using a
water quality model.
17. Applicant Certification
I certify that I am familiar with the information contained in the application and that to the
best of my knowledge and belief such information is true, complete, and accurate.
Anne -Marie Knighton
Town Manager
Printed a of Person Signing
Title
Signature of Applicant
Date
North Carolina General Statute 143-215.6 (b) (2) provides that: Any person who knowingly makes any false
statement representation, or certification in any application, record, report, plan, or other document files or
required to be maintained under Article 21 or regulations of the Environmental Management Commission
implementing that Article, or who falsifies, tampers with, or knowingly renders inaccurate any recording or
monitoring device or method required to be operated or maintained under Article 21 or regulations of the
Environmental Management Commission implementing that Article, shall be guilty of a misdemeanor punishable
by a fine not to exceed $25,000, or by imprisonment not to exceed six months, or by both. (18 U.S.C. Section
Page 3 of 4 C-WTP 03/05

Solids Handling Plan
The Beaver Hill WTP does not generate solids and does not require a solids
handling plan

BrioneTank
Raw Water Line
420 gpm
'm C ii t,I (A1 T lii
420 gm
Rettnd®n Basin
Hich Serviax
...1Freemason\BeaverHiIIWTP.dgn 5/16/2007 2:49:18 PM
P-A * OOO,:-kl
260 Um
ion e
Softmer T
.010 MOD
mCChnC
tr
TO
Distribution
Sys

FACT SHEET FOR EXPEDITED PERMIT RENEWALS
Basic Information to determine potential for expedited permit renewal
Reviewer/Date
, Eh Lat '1 A 0
Permit Number
0 (-Qo 8 (P ) I
Facility Name
W
Basin Name/Sub-basin number
,CA0VJC,, 0 3 - 01 - 0 9::
Receiving Stream
F, I &r-� C,rx.EK
Stream Classification in Permit
v�
Does permit need NH3 limits?
o
Does permit need TRC limits?
N o
Does permit have toxicity testing?
IJ o
Does permit have Special Conditions?
No
Does permit have instream monitoring?
N
Is the stream impaired on 303 d list)?
Any obvious compliance concerns?
Any permit mods since lastpermit?
Existing expiration date
11 30 ,o
New expiration date
If < 0 I
New permit effective date
I
Miscellaneous Comments LLO"- 441*1A
t♦
This is a SIMPLE EXPEDITED permit renewal (administrative
renewal with no changes, or only minor changes such as TRC, NH3,
name/ownership changes). Include conventional WTPs in this group.
This is a MORE COMPLEX EXPEDITED permit renewal (includes
Special Conditions (such as EAA, Wastewater Management Plan), 303(d)
listed, toxicity testing, instream monitoring, compliance concerns, phased
limits). Basin Coordinator to make case -by -case decision.
This permit CANNOT BE EXPEDITED for one of the following reasons:
r Facility (municipal/industrial)
Minor Municipals with pretreatment program
Minor Industrials subject to Fed Effluent Guidelines (lb/day limits for BOD, TSS,
etc)
�• Limits based on reasonable potential analysis (metals, GW remediation organics)
• Permitted flow > 0.5 MGD (requires full Fact Sheet)
• Permits determined by Basin Coordinator to be outside expedited process
TB Version 8/18/2006 (NPDES Server/Current Versions/Expedited Fact Sheet)

V. IMPLEMENTATION
5.1. Monitoring Frequency �---�
In order to be consistent with the monitoring guidance employed for other permits across the state,
monitoring frequencies will be based on the flow divisions used to define facility class in the 15A NCAC 08C
.0302 regulations. Requirements described in 15A NCAC 2B .0508(d) for water supply plants were used as
guidance. Table 5 summarizes the monitoring requirements. After sufficient data have been collected (eight to 12
data points over at least one year) the permittee may petition for a reduction in monitoring.
Table 5.1: WTP Monitorinz Requirement
Facility Class
Conventional Parameters and Toxicants
(Effluent and Instream)
Permitted Flow < 0.5 MGD
If limited - 2/Month
Not limited - Monthly
Permitted Flow >_ 0.5 MGD
If limited -Weekly
Not limited - 2/Month
Q5.:2.Whole Effluent Toxicity Testing
Membrane, ion exc ange, an conventional s should be required to conduct quarterly WET tests for
monitoring purposes. Eventually, the Division may choose to use this data to develop additional policy. The type
of WET test conducted will vary depending on receiving stream characteristics. In addition, the level of available
dilution and tidal effects will determine whether the facility should perform an acute or chronic test, while the type
of water (freshwater or saltwater) will determine which organism should be used. Table 1 summarizes WET -
testing requirements. Appendix A includes sample WET language.
Greensand filter systems will not be required to monitor whole effluent toxicity.
Table 5.2: WET Test Requirements- Monitor Only
Dilution
IWC < 0.25%
Acute 24-hour Pass/Fail at 90%
IWC _ 0.25%
Chronic test at IWC (maximum 90%)
Tidal Effects
Model idal discharge
Chronic test at chronic mixing zone characteristics
Tidal Discharge- not modeled'
Acute 24-hour Pass/Fail at 90%
Freshwater
Acute test organism: Fathead minnow
Chronic test organism: Cerioda hnia dubia
Acute test organism: Fathead Minnow OR Mysid Shrimp
Water Type
Saltwater
OR Silverside Minnow (permittee's choice)
Chronic test organism: M sid shrim 2
Notes:
1. Applies to existing dischargers only.
2. Permittee may choose to conduct comparison studies showing Ceriodaphnia dubia to be greater than or equal to Mysid
Shrimp in degree of sensitivity to the facility's effluent.
5.3. Peer Agency Review
At a minimum, the permit writer should consider providing a copy of draft permits for all membrane and
ion exchange facilities to the following agencies: Division of Marine Fisheries (for saltwater discharges), US Fish
and Wildlife Service (Sara Ward), Wildlife Resources Commission, and the Division of Environmental Health.
Draft permits proposing a discharge to shellfish waters (SA) must also be sent to the Shellfish Sanitation for review.
-8-

10&% F- Cc 49cc
EFFLUENT
LIMITS
MONITORING REQUIREMENTS
CHARACTERISTICS
Monthly
Weekly
Daily
Measurement
Sample
Sample
Averse
Averse
Maximum
Frequency
Type'
Location'
0.010
Instantaneous
Flow
E
MGD
3
Temperature
See Table 5.1
Grab
E,U,D
Salinity
See Table 5.1
Grab
E,U,D
Conductivity
See Table 5.1
Grab
E,U,D
Saltwater: 6.8 — 8.5
pH
See Table 5.1
Grab
E,U,D
Freshwater: 6.0 — 9.0
Dissolved Oxygen
See Table 5.1
Grab
E,U,D
Total Dissolved Solids
See Table 5.1
Grab
E
Total Suspended
30 mg/L
45 mg/L
See Table 5.1
Grab
E
Solids4
Freshwater:
17 -28
Total Residual
NgfL
See Table 5.1
Grab
E
Chlorines
Saltwater:
13 /L
Total Copper
Limit based on potential
See Table 5.1
Composite
E
Total Chloride
Limit based on potential
See Table 5.1
Composite
E
Total Iron
Limit based on potential
See Table 5.1
Composite
E
Total Manganese
Limit based on potential
See Table 5.1
Composite
E
Total Lead
Limit based on potential
See Table 5.1
Composite
E
Total Zinc
Limit based on potential
See Table 5.1
Composite
E
Ammonia Nitrogen
Limit based on otential
See Table 5.1
Composite
E
Fluorides
Limit based on otential
See Table 5.1
Composite
E
Total Nitrogen (TN)"
Quarterly
Composite
E
Total Phosphorus
Quarterly
Composite
E
(TP)"
Whole Effluent
Quarterly
Composite
E
Toxici Monitorin °
Notes:
1. An exception to the composite sampling is provided by 15A NCAC 2B.0505 (C), which states that
facilities with design flows under 30,000 gallons per day may use grab samples to characterize their
effluent.
2. Sampling locations: E = Effluent, U = Upstream of discharge location, D = Downstream of discharge
location.
3. For intermittent discharges, instantaneous flow monitoring is required and the duration of the
discharge must be reported. Include provisions for monitoring the instantaneous maximum flow rate
from the facility.
4. For existing plants, TSS limits may need to be phased in over a period of time to allow for the
construction of new treatment facilities
5. Limit only in effect if the facility uses chlorinated water in the filter backwash process (and discharges
filter backwash).
6. See section on WET testing for details (Table 5.2).
7. Fluoride monitoring should apply only if the facility backwashes with fluoridated, finished water.
Facilities under 0.05 MGD should only monitor for nutrients if discharging into a NSW. Monitoring
frequency should align with basin -specific requirements if those are more stringent.