NC0086924_Permit Issuance_20071220

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
December 20, 2007
Mr. Willie Mac Carawan
Tyrell County Administrator
PO Box 449
Columbia, North Carolina 27925
Subject: Issuance of NPDES Permit NC0086924
Tyrell Co RO WTP
Tyrell County
Dear Mr. Mac Carawan:
Division personnel have reviewed and approved your application for the subject permit.
Accordingly, we are forwarding the attached NPDES discharge 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 October
15, 2007.
The final permit includes the following changes from your draft permit:
r The limit for Nickel was corrected to 75 Ng/1 as it was in the previous 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 (6714 Mail Service Center, Raleigh, North Carolina 27699-6714).
Unless such demand is made, this decision shall be final and binding.
Please note that this permit is not transferable except after notice to the Division. The Division
may require modification or revocation and reissuance of the permit. 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, the Coastal Area Management Act
or any other Federal or Local governmental permit that may be required.
If you have any questions concerning this permit, please contact Teresa Rodriguez at telephone
number [phone], extension 553. .
Sincerely,
Al
Lr : Coleen H. Sullins
Cc: NPDES Files 11
Central Files
Washington Regional Office- Surface Water Protection
Division of Marine Fisheries
US Fish and Wildlife Service
Aquatic Toxicology Unit
1617 Mail Service Center, Raleigh, North Carolina 27699-1617 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer Visit us on the INTERNET @ www.enr.state.nc.us

Permit No. NCO086924
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
t
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
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 Water Quality
Commission, and the Federal Water Pollution Control Act, as amended,
Tyrrell County
Tyrrell County Reverse Osmosis Water Treatment Plant Discharge
is' hereby authorized to discharge wastewater from a facility located at
Tyrrell County RO Plant
3868 Albemarle Church Rd.
Columbia
Tyrrell County
to receiving waters designated as Bull Bay in the Pasquotank River Basin
in .accordance with the discharge limitations, monitoring requirements, and other conditions set
forth in Parts I, II, III, and IV hereof.
This permit shall become effective February 1, 2008.
This permit and the authorization to discharge shall expire at midnight on December 31, 2012.
Signed this day December 20, 2007.
. Lr- Coleen H. Sullins, Directo
Division of Water Quality
By the Authority of the Environmental Management Commission
Tyrrell County Reverse Osmosis
NPDES Permit No. NCO086924

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Tyrell County Reverse Osmosis
WTP
State Grid/Ouad: C29SW/Columbia West Latitude:
35° 56' 16" N
Longitude:
76'21'IrW
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Receiving
Stream: Bull Bay Drainage ee Basin:
Pasquo[anank River
Stream Class: SB Sub -Basin:
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03-01-53
North
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Facility Location -
not to scale
NPDES Permit No. NCO086294
Tyrell County

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Discharge
fpoint
instream sampling
location B
Instream sampling '
location M6
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Instream Monitoring Requirements Tyrrell County Reverse Osmosis
NPDES Permit No. NC0086924

Permit No. NCO086924
SUPPLEMENT TO PERMIT COVER SHEET
Tyrrell County Reverse Osmosis Water Treatment Plant
RO Reject Discharge Wastewater
is hereby authorized to:
1. Continue to discharge up to 0.216 MGD of reject water from a reverse osmosis water
treatment plant located at 3868 Albemarle Church Rd., Columbia, Tyrrell County, and
2. Discharge reject wastewater from an effluent diffuser system at the location specified on
the attached map into Bull Bay which is classified SB waters in the Pasquotank River
Basin.
Tyrrell County Reverse Osmosis
NPDES Permit No. NCO086924

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 from outfall(s) serial number 001- Reverse Osmosis Reject
Water. Such discharges shall be limited and monitored by the Permittee as specified below:
EFFLUENT
CHARACTERISTICS
DISCHARGE LIMITATIONS
Monitoring Requirements
Monthly Averagi
Daily Maximum
Measurement
Frequency
Sample Type
Sample
Locations
Flow MGD
0.216 MGD
Continuous
Recording
I or E
Total Dissolved Solids
Monthly
Grab
E
Temperature
Monthly
Grab
E & Instream
Dissolved Oxygen
Monthly
Grab
E & Instream
Salinity
Monthly
Grab
E & Instream
Conductivity
Monthly
Grab
E
H2
Monthly
Grab
E
NH3-N
2/Month
Grab
E
Total Chromium
20 µ 1'Monthly
Grab
E
Total Iron
Monthly
Grab
E
Total Mercury
0.025 µ 1
Monthly
Grab
E
Total Nickel
75 µ 1
Monthly
Grab
E
Total Selenium
71 µ 1
Monthly
Grab
E
Total Zinc
Monthly
Grab
E
Total Copper
Monthly
Grab
E
Chloride
Monthly
Grab
E
Total Fluoride
Monthly
Grab
E
Total Nitrogen
Monthly
Grab
E
Total Phosphorus
Monthly
Grab
E
Acute Toxicity3
Quarterly
Grab
E
NOTES:
1. Sample Locations: I - Influent; E - Effluent, Instream - see Part I, Special Condition A.(4). for
locations and frequencies.
2. The pH shall not be less than 6.8 standard units or greater than 8.5 standard units.
3. Acute Toxicity Monitoring (Mysid) 24hr P/F C 90%, Quarterly; January, April, July, and October. See
Special Condition A(2). Quarterly toxicant monitoring should correspond with quarterly toxicity
testing.
THERE SHALL BE NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN TRACE
AMOUNTS.
Tyrrell County Reverse Osmosis
NPDES Permit No. NCO086924

A (2). ACUTE TOXICITY PASS/FAIL MONITORING (QRTRLY)
The permittee shall conduct acute toxicity tests on a guarterlu basis using .protocols defined in the
North Carolina Procedure Document entitled "Pass/ Fail Methodology For Determining Acute
Toxicity In A Single Effluent Concentration" (Revised -July, 1992 or subsequent versions). The
monitoring shall be performed as a Mysidopsis bahia 24 hour static test. The effluent
concentration defined as treatment two in the procedure document will be 90%. Effluent samples
for self -monitoring purposes must be obtained during representative effluent discharge below all
waste treatment. The tests will be performed during the months of January, April, July, and
October.
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 TGE3E. Additionally, DWQ Form AT-2 (original) is to be sent to the following address:
Attention: Environmental Sciences Section
North Carolina Division of
Water Quality
1621 Mail Service Center
Raleigh, N.C. 27699-1621
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 until such time that a valid test is submitted. 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 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.
A (3). DISCHARGE SPECIAL CONDITION
The effluent diffuser must be designed to prevent surface turbulence and bottom scour. Should
the location of the discharge cause visible turbulence within Bull Bay, the Division .may require
that the discharge be relocated.
The diffuser must be submerged during low tide conditions.
Tyrrell County Reverse Osmosis
NPDES Permit No. NCO086924

A (4). INSTREAM MONITORING REQUIREMENTS
The following parameters shall be monitored within Bull Bay (at the locations indicated) 2/month
year round.
Parameter
Location
Frequency
Months
Salinity (ppt)
B, M6
2/month
January through
Temperature t C)
December (year)
D.O. /1
B - Background sample should be taken at or near the mouth of Bunton Creek, in the estuary,
outside the influence of the discharge.
M6 - Along a northwest/ southeast transect from the discharge point, approximately 50 feet
northwest of the discharge.
NOTE: Map on the following page is not to scale.
A (5). Total Residual Chlorine Monitoring
It is the Division of Water Quality's understanding that no residual chlorine will be in the reject
water from the reverse osmosis process. Should this not be the case in the future, the Division of
Water Quality, NPDES Unit, shall be notified immediately -and this permit may be reopened to
include total residual chlorine monitoring and a limit.
Tyrrell County Reverse Osmosis
NPDES Permit No. NCO086924

PUBLIC NOTICE
STATE OF NORTH CAROLINA
ENVIRONMENTAL MANAGEMENT
COMMISSIONINPDES UNIT
1617 MAIL SERVICE CENTER
RALEIGH, INC 27699-1617
NOTIFICATION OF INTENT TO ISSUE
A NPDES WASTEWATER PERMIT
On the basis of thorough staff review and
application of NC General Statute 143.21,
Public law 92-500 and other lawful stan-
dards and regulations, the North Carolina
Environmental Management Commission
proposes to issue a National Pollutant Dis-
charge Elimination System (NPDES) waste-
water discharge permit to the person(s)
listed below effective 45 days from the pub-
lish date of this notice.
Written comments regarding the proposed
permit will be accepted until 30 days after
the publish date of this notice. All comments
received prior to that date are considered in
the -final determinations regarding the pro-
posed permit. The Director of the NC Divi-
sion of Water Quality may decide to hold a
public meeting for the proposed permit
should the Division receive a significant
degree of public interest.
Copies of the draft permit and other sup-
porting information on file used to determine
conditions present in the draft permit are
available upon request and payment of the
cost of reproduction. Mail comments and/or
requests for information to the NC Division
of Water Quality at the above address or
call Dina Sprinkle [phone], exten-
sion 363 at the Point Source Branch.
Please include the NPDES permit number
(attached) in any communication. Interested
persons may also visit the Division of Water
Quality at 512 N. Sailsbury Street, Raleigh,
NC 27604-1148 between the hours of 8:00
a.m. and 5:00 p.m. to review information on
file.
Tyrrell County — Tyrrell County Reverse
Osmosis Water Treatment Plant, 108 South
Water Street, Columbia, North Carolina
27925, has applied for renewal of its
NPDES (NC0086924) permit discharging to
Bull Bay in the Pasquotank River Basin.
Some metals are water quality limited in this
permit. This discharge may affect future dis-
charges in this portion of the basin.
Captain Neill's Seafood, Inc. (508 North
Street Road, Columbia, NC) has applied for
renewal of NPDES permit NC0088234, dis-
charging seafood processing wastewaters
to an unnamed tributary to the Albemade
Sound in the Pasquotank River Basin. pH is
water quality limited. This discharge may
affect future allocations in this portion of the
receiving stream.
Mr. Willie Etheridge, III (P.O. Box 77,
Wanchese, NO 27981) has applied for
renewal of NPDES permit NCO048151 for
the Etheridge Seafood Company WWiP in
Dare County. This permitted facility dis-
charges wastewater to Mill Landing Creek
in the Pasquotank River Basin. This dis-
charge may affect future allocations in this
portion of the Pasquotank River Basin.
10-28c
Q97 i� 1 I�Z;T�I�L9C1 � / 7
DARE COUNTY.
AFFIDAVIT OF PUBLICATION
Before the undersigned, a Notary Public of said County
and State, duly commissioned, qualified, and authorized
by law to administer oaths, personally appeared
Su.s.an..M....Simp.snn,...t> Qa.s.ux-,r.......
.............................................. . who being
fast duly sworn, deposes and says: that he (she) is of The
Times Printing Co., Inc., engaged in the publication of a
newspaper known as THE COASTLAND TIDIES, pub-
lished, issued, and entered as second class mail in the Town
of Manteo, in said County and State; that he is authorized to
make this affidavit and sworn statement; that the notice or
other legal advertisement, a true copy of which is attached
hereto, was published in THE COASTLAND TIMES on the
following dates:
0 ct.Q.b a r...28.,...2.0 07 ...........................
........................................................:
and that the said newspaper in which said notice, paper,
document, or legal advertisement was published was, at
the time of each and every such publication, a newspaper
meeting all of the requirements and qualifications of Sec-
tions 1-596 and 1-597 of the General Statutes of North Card -
Una and was a qualified newspaper within the meaning of
Section 1-597 of the General Statutes of North Carolina.
This.-,11tFyda_,of December xxx 2007
ry A ................ 2W
Sworn to arr�bscribed to
day of .... .ec.e, ber >2" 2007
Notary Public
My Commission expires: ..A,ugu,st,,12

DENR/DWQ
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
NPDES No. NC0086924, Tyrrell County RO Plant
Facility Information
Applicant/Facility Name:
Tyrrell County/Tyrrell Co. RO Plant Discharge WW
Applicant Address:
P.O. Box 449, Columbia, NC 27925
Facility Address:
3868 Albemarle Church Rd., Columbia, NC 27925
Permitted Flow
0.216
lype of Waste:
RO concentrate
Facility/Permit Status:
Renewal
County:
Tyrrell
Miscellaneous
Receiving Stream:
Bull Bay
Stream Class:
SB
303(d) Listed?:
No
Subbasin:
030153
River Basin:
Pas uotank
Index No.
30-14
Drainage Area (mi2):
unknown
Regional Office:
WaRO
Summer 7Q 10 (cfs)
Tidal
Quad
D33NE, Col West
Winter 7Q10 (cfs):
Permit Writer:
Teresa Rodriguez
Average Flow (cfs):
Date:
October 22, 2007
IWC (%):
100
SUMMARY
The Tyrell Co Reverse Osmosis plant is a water treatment system utilizing reverse osmosis to
treat groundwater from the Castle Hayne aquifer. The RO plant is designed to operate at 300
gallons per minute. A future expansion to 600 gallons per minute is part of the long term plan
for the County with an ultimate discharge of RO concentrate of approximately 0.216 MGD.
The permit was issued in November 2003 with an expiration date of December 31, 2007. The
permit included extensive monitoring requirements for the effluent and the receiving
waterbody. After collecting two years of data several parameters were deleted from the permit
as they did not show reasonable potential to exceed the water quality limits.
DMR DATA REVIEW:
DMR Data was reviewed for the period of January 2005 to July 2007. A summary is presented
in Table 1.
Table 1
Flow
MGD
Temp
4C
Conductivity
umhos/cm
DO
mg/l
pH
SU
Salinity
ppt
Total
Dissolved
Solids m
Ammonia
mg/l
Total
Phosphorus
m
Total
Nitrogen
mgA
Avera a
0.06
20.1
17614
1.7
7.3
16.8
13251
16.55
0.81
17.64
Maximum
0.08
20.5
20900
2.6
7.5
32.4
14416
18.68
0.94
22.60
Minimum
0.05
19.8
15000
1.0
7.1
14
11130
1 8.38
0.40
8.40
RPA:
The permit requires monitoring for aluminum, chromium, iron, zinc, copper, mercury, nickel,
selenium, fluoride, and chloride. Mercury, nickel and selenium are water quality limited. A
review of the data shows that chromium, nickel, selenium, mercury, zinc and copper show
reasonable potential to exceed the standards. Limits for mercury, nickel and selenium will
remain in the permit. A daily maximum limit of 20 ug/1 for total chromium is included in the
permit.
Aluminum and Total Organic Carbon will be eliminated from the monitoring requirements,
there is no standard or criteria for saltwater for these parameters. As per the current guidance
for membrane systems they are not pollutants of concern.
"l'yrWIT
Co. RO IT
NPDES Renewal
Page 1

TOXICITY TESTING:
Based on the ultimate reject flow of 0.216 MGD and current policy for RO plants, quarterly
acute P/F monitoring at 90%, mysid 24 hour testing is required in the permit. The facility failed
6 quarterly tests since 2003.
INSTREAM MONITORING:
The permit requires surface and bottom monitoring at 8 instream locations. One is a
background location, one at the discharge point and others surrounding the discharge point.
All locations show similar values for DO, salinity, conductivity, temperature and pH, including
the background location. Salinity ranged between 0.2 ppt and 7 ppt on most monitoring
locations. The discharge point reported one high value of 15 ppt. DO ranges from 6 to 10.9 for
all stations. Temperature and pH values were within normal conditions. Since data shows
that there is no significant variability among the 6 stations the monitoring requirement will be
modified to reduce the number of sampling locations to two locations, the background location
and one closer to the discharge.
The Division has an ambient monitoring station on the Albemarle Sound northeast of the
discharge. Salinity values ranged from 0.03 ppt to 8.2 ppt and DO values ranged from 6.9
mg/1 to 13.2 mg/l.
Basin Plan/303(d):
Bull Bay is not rated on an evaluated basis in the aquatic life category due to the
toxicity failures from the RO facility. Bull bay is not listed in the North Carolina 303(d)
list.
PROPOSED CHANGES:
• Eliminate aluminum and TOC monitoring from permit. These parameters are not pollutants
of concern.
• Total chromium shows reasonable potential to exceed the water quality standard. A limit
was implemented.
• Instream monitoring requirements were modified based on the results of two years of
monitoring. Instream sampling will be required for one background station and one station
near the discharge point.
PROPOSED SCHEDULE FOR PERMIT ISSUANCE:
Draft Permit to Public Notice: October 24, 2007
Permit Scheduled to Issue: December 17, 2007
STATE CONTACT:
If you have any questions on any of the above information or on the attached permit, please
contact Teresa Rodriguez at [phone] ext. 553.
NAME: / DATE: (v o2 310
Tyn-elI Co. RO WTP
N FIDES Renewal
Page 2

REASONABLE POTENTIAL ANALYSIS
Tyrell Co RO
Outfall 001
NCO086924
Ow = 0.216 MGD
Time Period 0
Ow (MGD) 0.216
WWTP Class
0
7010S (ds) 0
IWC (%) 0 7010S
100
7010W (cts) 0
0 701OW
100
3002 (cts) 0
® 3002
100
Avg. Stream Flow, OA (cis) 0
® OA
100
Reeving Stream Ball Bay
Stream Class SB
STANDARDS ti
PARAMETER
TYPE
CRITERIA (2)
POL
Units
REASONABLE POTENTIAL RESULTS
RECOMMENDED ACTION
(1)
NC WOS/ *FAY/
a f VA Un Pmd CW ACombb Cw
Chrwk Am*
Acute: WA
Arsenic
C
uglL
0 0
WA
_ _ _ _
— —----------- — —-------------
Chronic: AVALUEI
Acute: WA
Beryllium
C
ug/L
0 0
WA
_ hronic__ tiVA_ W_
C. EI
— —----------- — —--------- -
Acute: 42
Cadmium
NC
5 42
ug/L
0 0
WA
_ _ _
Chronic:--- 5--
----------------------------------
Acute: WA
Chromium
NC
20
ug/L
31 10
24.8
Chronic---20 -
— — —----------- — — ----- -----
Acute: 6
Copper
NC
3 AL 5.8
ug/L
31 19
114.2
Chrontc--- 3--
----------------------------------
Acute: 1
Cyanide
NC
1 N 1
10
ugtL
0 0
WA
_-_•
Chronic: 1 —
--- ---•-----_----_
— — - - — —
Acute: WA
Ruorido
NC
ug/L
0 0
WA
Chronic: #VALUE!
---------------------------------
Acute: 210
Load
NC
25 N 210
ug/L
0 0
WA
Chronic ---25 -
—-----------------------•— -----
Acute: WA
Mercury
NC
25
2.0000
ng/L
29 27
60.8760
Chronic--25--
----------------------- —-------
Acute: WA
Molybdenum
A
3,500
ugtL
0 0
WA
Chronic —9—-
-------•-------------•-----------
Acute: 74
Nickel
NC
8 74
ug/L
31 5
167.5
Chronic--- 8--
—---------------- — ---•-------
Acute: WA
Phenols
A
1 N
ug/L
0 0
WA
_
Chronic:--- � --
—•—•-----------------------------
Acute: WA
-
Selenium
NC
71.0
ug/L
31 13
317.2
—.—_—.—
Acute: 2
Silver
NC
0.10 AL 1.9
ug/L
0 0
WA
Acute: 95
Zinc
NC
86 AL 95
ugtL
31 6
89.3
_ _ -
Chronic--- 86
---------------------------------
Legend: " Freshwater Discharge
C = Carcinogenic
NC = Non -carcinogenic
A = Aesthetic
RPA, rpa
12/20/2007

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2005
20.35
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17.9
18.68
0.87
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<100
<10
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2005
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16.7
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<100
<10
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2005
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0.73
21.04
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<100
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2005
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0.81
17.83
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124.
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<10
<100
<10
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2005
20.2
7.1
17.8
16.84
0.78
20.24
<5
42.
170.
<10
<10
<100
<10
0.0018
0.063
6
2005
20.5
7.2
16.1
18.2
0.82
18.02
<5.0
26.
190.
17.
<10
<100
<10
0.002
0.0609
7
2005
20.30
7.4
15.3
18.6
0.79
16.9
<5
29.
270.
<10
<10
<100
<10
0.0022
0.055516
1=pass
8
2005
20.40
7.2
16.
16.52
0.77
17.1
<5.0
38.
195.
<10
<10
<100
<10
0.001
0.060194
9
2005
20.50
7.5
14.9
16.68
0.78
17.12
5.
<10
265.
<10
18.
<100
<10
0.0017
0.0514
10
2005
20.43
20900.
2.05
7.4
17.3
16.82
0.81
:-8.4
16.83
<5
37.
213.
<10
<10
<100
<10
14269.
0.001
0.051806
1=pass
11
2005
20.25
19400.
1.85
7.2
17.3
17.08
0.79
22.6
19.08
<5.0
29.
<5.0
<10
10.
225.
50.
14243.
0.0016
0.053033
12
2005
20.10
17900.
2.6
7.2
17.5
17.44
0.8
21.2
28.56
<5
33.
53.
<10
<10
227.
68.
13240.
0.0013
0.053032
1
2006
20.20
19000.
2.15
7.3
16.9
17.79
0.73
21.4
20.7
S.
51.
52.
10.
<10
<100
23.
13943.
0.0012
0.052871
1 Pass
2
2006
20.05
19500.
1.7
7.3
15.3
8.375
0.87
19..7
19.7
< 5
40.
< 50
<10
<10
210.
33.
13856.
0.0013
0.05275
3
2006
20.10
18900.
1.65
7.3
14.
16.5
0.9
21.5
20.94
<5
28.
<50
<10
<10
<100
59.
13587.
0.001
0.056581
4
2006
20.07
19100.
1.6
7.3
18.2
12.76
0.82
21.8
19.4
S.
30.
<50
<10
<10
<100
70.
13659.
0.0014
0.050967
1=pass
5
2006
20.30
18200.
1.69
7.3
15.6
16.44
0.9
19.2
19.48
10.
<10
200.
15.
35.
<100
103.
14416.
0.0034
0.067778
6
2006
20.37
16900.
1.5
7.2
16.5
16.1
0.82
18.2
22.82
<5
<10
380.
<10
<10
<100
32.
13861.
0.0171
0.077769
7
2006
20.13
16800.
1.15
7.2
17.8
16.64
0.83
19.3
23.98
6.
25.
266.
<10
<10
<100
29.
13558.
0.0125
0.073654
2=Fail
8
2006
20.20
16200.
1.25
7.3
15.6
16.22
0.88
22.4
19.25
<5
31.
321.
<10
<10
<100
69.
13661.
0.0013
0.072963
9
2006
20.20
16400.
1.5
7.3
14.5
16.06
0.94
18.4
17.32
< 5
< 10
165.
<10
<10
< 100
56.
12827.
0.009
0.072615
10
2006
20.20
15000.
1.05
7.2
15.3
17.32
0.4
15.9
17.8
<5
11.
163.
<10
<10
<100
35.
13089.
0.0081
0.071741
fail = 2
11
2006
20.15
16000.
1.2
7.3
16.5
17.1
0.91
16.6
16.46
<5
<10
170.
53.
11.
<100
<10
13373.
0.005
0.065769
12
2006
20.15
17300.
1.5
7.3
15.3
17.26
0.8
18.6
18.97
<5.0
13.
129.
<10
<10
<100
<10
13263.
0.00257
0.067385
1
2007
- 19.97
16200.
1.7
7.2
17.3
16.7
0.81
15.7
17.54
7.
<10
<50
<10
<10
<100
<10
13724.
0.0027
0.070963
1=pass
2
2007
19.90
17900.
1.75
7.3
16.5
16.26
0.79
16.3
21.9
<5.0
<10
<50
<10
14.
<100
<10
13984.
0.0052
0.071
3
2007
20.05
17200.
2.2
7.3
16.5
16.24
0.83
13.8
19.
8.
<10
<50
<10
<10
<100
<10
11130.
0.0016
0.065207
4
2007
20.03
16500.
1.9
7.3
16.
16.51
6.68
14.9
20.52
<5
<10
<50
<10
z10
<100
<10
I 11670.
<0.1
0.067074
pass = 1
5
2007
20.10
16900.
1.9
7.2
16.2
16.3
0.74
13.8
17.64
12.
<10
<0
<10
24.
<100
<10
12290.
<.001
0.069759
6
2007
20.25
17200.
1.9
7.2
15.3
18.
0.85
15.7
16.36
<5.0
<10
<50
<10
<10
140.
<10
12420.
0.001
0.0695
7
2007
20.07
18100.
2.
7.2
16.2
17.76
0.92
14.8
18.94
6.
<10
<50
<10
<10
<100
<10
11460.
0.001
0.071964
2=Fall
Limit
75
71
0.025
Aver
20.18 17614 1.72 7.3 16.86 16.55 0.81 17.64 19.36 7 31 202 21
19 201 50 13251
0.0034 0.06
Max
20.50 20900 2.60 7.5 32.40 18.68 0.94 22.60 28.56 12 51 380 53
35 227 103 14416
0.0171 0.08
Min
19.80 15000 1.05 7.1 14.00 8.38 0.40 8.40 13.57 5 11 52 10
10 140 23 11130
0.0010 0.05

RE: TYrrell Co. RO plant
Subject: RE: TYrrell Co. RO plant
From: Jeff Manning [e-mail]>
Date: Mon, 10 Sep 2007 14:56:52 -0400
To: [e-mail]
Teresa,
Z spoke with Gil earlier about Tyrrell County Bull Bay RO plant NC0086924. We have some very valid concerns
about this facilities failure rate on their aquatic toxicity tests. T believe they have failed six times in
the last four years. Additionally Al Hodge was showing me a trending of their ammonia levels and they look
very high on a consistent basis. We just want to make sure that there will be limits placed on this
facility, in their new permit, to give us more oversight on this facility.
Thanks,
Jeffery
1 of 1 9/ 12/2007 8:49 AM

fir
u
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e
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Instream sampling locations B and DPT

Instream salinity surface
18
16
14
12
10
8
6
4
2
0
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DPT
M2
M1
- M3
- M4
- M5
M6

Instream salinity surface
MO
16
14
12
10
A
A
0
2
0
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- DPT,
M2
- M1
- M3
- M4
- M5
M6

Salinity Surface
8 ---- --- - -- - -
7 -
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--
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4
-- -A
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/off ���—

Tyrrell County Board of Commissioners
P.O. Box 449
Columbia, North Carolina 27925
Telephone [phone]
Thomas W. Spruill, Chairman
Florence E. Bryant, Vice Chairman
Anthony (Tony) F. Sawyer
May 23, 2007
Mrs. Carolyn Bryant
NCDENR /DWQ/ Point Source Branch
1617 Mail Service Center
Raleigh, NC 27699-1617
Dear Mrs. Bryant:
Carl Willis
Zacharias (Zack) Brickhouse
Penny Rhodes Jones, Clerk
The purpose of this letter is to inform you that Tyrrell County has given
authorization to Hobbs, Upchurch & Associates, P.A. to assist with the renewal of
the NPDES permit.
If you have any questions please contact me at the number listed above.
Sincerely,
01
W. Mack Carawan, Jr.
County Administrator

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 INCO086924
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 TYRRELL COUNTY
Facility Name TYRRELL COUNTY RO WATER TREATMENT PLANT
Mailing Address PO BOX 449
City COLUMBIA
State / Zip Code NC 27925
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 3868 ALBEMARLE CHURCH RD
City COLUMBIA
State / Zip Code NC 27925
County TYRRELL
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 TYRRELL COUNTY WATER DEPARTMENT
Mailing Address PO BOX 449
City COLUMBIA
State / Zip Code NC 27925
Telephone Number [phone]
Fax Number [phone]
4. Ownership Status:
Federal ❑ State ❑ Private ❑ Public
Pagel of 4 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, nanofiltration)
Check here if the treatment process also uses a water softener ❑
6. Description of source water(s) (i.e. groundwater, surface water)
BRACKISH WATER FROM THE CASTLE HAYNE AQUIFER
?. Describe the treatment process(es) for the raw water:
BRACKISH WATER IS INJECTED WITH A PROPRIATARY FORMULATION OF SCALE
INHIBITOR AND SULFURIC ACID PRIOR TO FILTRATION THRU A 5 MICRON FILTER. IT IS
THEN PUMPED THRU A TWO -STAGE RO UNIT WHERE APPORXIMATELY 75% IS
RECOVERED AS PERMEATE
S. Describe the wastewater and the treatment process(es) for wastewater generated by the
facility:
WASTEWATER GENERATED BY THE SANITARY FACILITIES AT THE WTP IS SENT TO AN
ON -SITE SEPTIC SYSTEM.
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: 6 Duration: 15 HRS
11. Plant design potable flowrate .936 MGD
Backwash or reject flow .216 MGD
12. Name of receiving stream(s) (Provide a map showing the exact location of each outfall, including
latitude and longitudep.
BULL BAY (35-56-16 N 76-21-27 W)
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.
SCALE INHIBITOR
SULFURIC ACID
14. Is this facility located on Indian country? (check one)
Yes ❑ No ED
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.
WILLIE MAC CARAWAN TYRRELL COUNTY ADMINISTRATOR
Printed name of Person Signing Title
Signa
Date
5-
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 03105

Concentrate 75 gpm
TDS 14770 mg/L
Well Feedwater 390gpm Pretreatment RO System
TDS 3200mg/L Scale inhibitor,
sulfuric acid
Blend 20 gpm
TDS 3200 mg/L
Permeate 294 gpm
ated Water to Storage Post -Treatment TDS 160 m /l
315 gpm Chlorine, fluoride,
TDS 480 mg/L NaOH, CaC12
TYRRELL CO RO WTP- PROCESS SCHEMATIC
NPDES # NCO086924

REVERSE OSMOSIS WTP- TYRRELL COUNTY
NC 0086924
The above listed water treatment facility utilizes a membrane treatment process was not
required to have solids handling facilities. Therefore it does not have a Sludge
Management Plan.
Willie Nfack Caraw , dministrator
Tyrrell County

FACT SHEET FOR EXPEDITED PERMIT RENEWALS
Basic Information to determine potential for expedited permit renewal
Reviewer/Date
losi .
Permit Number
Facility Name
tr
Basin Name/Sub-basin number 27
K 43 • D . S'3
Receiving Stream
Stream Classification in Permit
Does permit need NH3 limits?
Does permit need TRC limits?
Does permit have toxicity testing?
Does permit have Special Conditions?
Does permit have instream monitoring?
Is the stream impaired on 303 d list)?
Any obvious co m Hance concerns?
Any permit mods since lastpermit?
a
Existing expiration date
New ex iration date
New permit effective date
Miscellaneous Comments
g
YES_ 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.
YES_ 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.
NO ✓ This permit CANNOT BE EXPEDITED for one of the following reasons:
• Major 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)

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PERMIT NUMBER: NCO086924 PERIOD ENDING MONTH: 12 - 2005 DMR 12 Month Calculated
FACILITY NAME: Tyrrell County -Reverse Osmosis WTP
PAGE 6 OF 7
CITY: Columbia COUNTY: Tyrrell REGION: Washington
01067
01077
01092
01105
01147
50050
70295
71900
ugA
ug/l
ugA
ugA
ugA
mgd
mgA
ugA
Bickel, Total
Silver, Total
Zinc, Total (as
Aluminum, Total
Selenium, Total
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Mercury, Total
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0.216
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0.0018
0.216
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0.0017
0.216
10-05
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0.001
0.216
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