NC0034860_Regional Office Historical File Pre 2018 (2)

PV
Pat McCrory
Governor
��,��
RED,ENR
North Carolina Department of Environment and Natural Resources
Division of Water.Resources
July 15, 2015
Mr. Hank Byrd, President
Schneider Mills, Inc.
PO Box 519
Taylorsville, North Carolina 28681
Subject: Draft NPDES Permit
Permit NCO034860
Alexander County
Class 2 Facility
Dear Mr. Byrd:
Donald R. van der Vaart
Secretary
Enclosed with this letter is a copy of the draft permit for your facility. Please review
this draft carefully to ensure thorough understanding of the conditions and
requirements it contains. The permit includes the following conditions:
• The permitted flow was modified to 0.75 MGD. The Division issued an
Authorization to Construct (ATC) for the construction of a 0.75 MGD wastewater
treatment facility in 1983. Since the flow -limit in NPDES permits is based off the.
design capacity of the treatment system your permit limit was changed to
correspond with the issued ATC.
• As a result of a reasonable potential analysis monitoring for zinc was eliminated
from the effluent monitoring requirements for outfall 002.
• Aluminum and iron will be removed from the monitoring requirements for outfall
002 since no Alum or Iron sulfate are added in the water treatment process.
• Whole effluent toxicity testing will be eliminated from outfall 002.
• Limits for BOD, TSS, and COD for outfall 001 were calculated based on
production and federal effluent guidelines. The limit for BOD is based on water
quality as it is more stringent than the limit calculated based on effluent
guidelines. Limits for COD and TSS are technology based limits.
• A special condition was added to your permit including requirements for
electronic reporting. Proposed federal regulations require electronic submittal of
all discharge monitoring reports (DMRs) and specify that, if a state does not
establish a system to receive such submittals, then permittees must submit
1617 Mail Service Center, Raleigh, North Carolina 27699-1601
Phone: [phone] \ Internet: www.ncdenr.gov
An Equal Opportunity \ Affirmative Action Employer —Made in part by recycled paper

r
Mr. Hank Byrd
July 15, 2015
Page 2 of 2
DMRs electronically to the Environmental Protection Agency (EPA). The Division
anticipates that these regulations will be adopted and is beginning
implementation.
The requirement to begin reporting discharge monitoring data electronically using
the NC DWR's Electronic Discharge Monitoring Report (eDMR) internet
application has been added to your final NPDES permit. [See Special Condition
A. (4)] For information on eDMR, registering for eDMR and obtaining an eDMR
user account, please visit the following web page:
http://portal.ncdenr.org/web/wq/admin/bog/ipu/edmr.For information on
EPA's proposed NPDES Electronic Reporting Rule, please visit the following web
site: http://www2.epa.gov/compliance/proposed-npdes-electronic-reporting-
rule.
Please note that the receiving stream is listed as an impaired waterbody on the North
Carolina 303(d) Impaired Waters List. Addressing impaired waters is a high priority
with the Division, and instream data will continue to be evaluated. If there is
noncompliance with permitted effluent limits and stream impairment can be
attributed to your facility, then mitigative measures may be required.
Concurrent with this notification the Division is publishing a notice in a newspaper
having circulation in the general Alexander County area, soliciting public comments
on this permit draft. Please provide any comments you may have to the DENR - DWQ,
NPDES Program no later than 30 days after receiving this draft permit.
Following the 30-day public comment period, the Division will review all pertinent
comments and take appropriate action prior to issuing a final permit, If you have
questions concerning this draft permit, please call me at [phone] or by email at
teresa.rodriguez(i ,ncdenngov.
Sincerely,
Teresa Rodriguez
NPDES Complex Permitting Unit
cc: NPDES Files
EPA Region 4 (e-copy)
Mooresville Regional Office / Water Quality Regional Operations (e-copy)
Aquatic Toxicology Branch (e-copy)
Wastewater Operators Certification Group (Steve Reid, e-copy)

Pr
Permit NCO034860
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER RESOURCES
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provision of North Carolina
regulations promulgated and adopted by the North
and the Federal Water Pollul
is hereby authorized
to receiving waters
effluent limitations,
This permit sli
This perrmn an
N
Signed this day
1170
as Muddy Fork Cr
reaulrements. and
43-215.1, other lawful standards and,
imental Management Commission,
Control Act, as amended,
Ills, Inc.
te'wat_ r,_from a facility loca
Mills ° ,,
1516 North
flan the&& 'Wba River Basin, in accordance with
conditions set forth in Parts I, II, and III hereof
expire at midnight on July 31, 2020.
S. Jay Zimmerman, P.G.
Director, Division of Water Resources
By Authority of the Environmental Management Commission
Page 1 of 8

'q11NPermit NCO034860
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.
Schneider Mills, Inc.
is hereby authorized to-./
1. Continue to operate an existing 0.75 MGD wastewater trAtme \ f cXility discharging treated process -
contact and domestic wastewater via outfall 001 and•consisting o€thelfollowing components:
• Bar screen �
• Instrumented flow metering device
• Aeration basin with two mechanical aerators
• Clarifier
• Sludge return pumps
• Aerobic digester
• Cascade aeration and
• Sludge drying beds . `
2. Continue to operate a conventional water treatment plant with a discharge of filter backwash currently
discharging,amonthly averagewas ew t -flow of'0.0k9 MGD via outfall 002 and consisting of the
:ollowing componennse
• 6�Mic ofloc® filters
<e
• Two edimentation p,
3. This facility is foc edatat S
4. Discharge from said was
Creek (see attached map);
ler�NUs Inc. off of NC Highway 16 North in Alexander County.
Ltment works through Outfall 001 and Outfall 002 to Muddy Fork
C waters within the Catawba River Basin.
Page 2 of 8

Permit NCO034860
PART I
A. (1) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (OUTFALL
001) [15A NCAC 02B .0400 ET SEQ., 02B .0500 ET SEQ.]
During the period beginning on the effective date of the permit and lasting until expiration, the permittee
is authorized to discharge treated wastewater through Outfall 001. Such discharges shall be limited and
monitored' by the permittee as specified below:
PARAMETERS
EFFLUENT
LIMITS
MONITORING
REQUIREMENTS
Monthly
Average
Daily
Maximum
Measurement
Frequency
Sample Type.
Sample
Location2
Flow
0.75 MGD
/Continuous
Recording
Influent or
Effluent
BOD, 5 day, 20°C
29 mg/1
181 lb/day
43 mg/1
272lb/day
"' Weekly'
Composite
Effluent
Total Suspended Solids
SS
117 lb/dap
2551b/daffy
\
Weekly
mposite
\\C
Effluent
COD
627.9 lb/day
976.2 lb/aay
Weekl
'69m osite
Effluent
NH3 as N (April 1
through October 31)
1.9 mg/L
9.5 mg/L
Weekly
Comjosite
Effluent
NH3 as N (November
1 through March 31
4.7 mg/L
3:5 �mg/L
`�,W�ekly
Composite
Effluent
Dissolved Oxygen 3'"�''�
j
Weekly
Grab
Effluent
Total Nitrogen (NO2
+ NO3 + TIC
� ,r`
"Quarterly
Composite
Effluent
Total Phosphorus
ti . ;',
Quarterly
Composite
Effluent
Chronic Toxiei i -'
,. �\
Quarterly
Composite
Effluent
Temperature CC)
,
``� `'
Weekly
Grab
Effluent
H 5
Weekly
Grab
Effluent
Conductivity
Weekly
Grab
Upstream &
Downstream_
Temperature, °C
Weekly
Grab
Upstream &
Downstream
Dissolved Oxygen
tI
Weekly
Grab
Upstream &
Downstream
Footnotes:
1. No later than 270 days from the effective date of this permit, begin submitting discharge monitoring
reports electronically using NC DVWs eDMR application system. See Special Condition A (5).
2. Upstream = at least 50 feet upstream from the outfall. Downstream = at or near NCSR 1313.
3. Daily average effluent concentration of dissolved oxygen shall not fall below 5.0 mg/L.
4. Chronic Toxicity (Ceriodaphnia) at 45 %; quarterly during March, June, September, December; see
condition A(3).
5. pH shall not fall below 6.0 nor exceed 9.0 standard units.
Effluent shall contain no floating solids or foam.
Page 3 of 8

Permit NC0034860
A. (2) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (OUTFALL
002) [15A NCAC 02B .0400 ET SEQ., 02B .0500 ET SEQ.]
During the period beginning on the effective date of the permit and lasting until expiration, the
Permittee is authorized to discharge treated wastewater through Outfall 002. Such discharges shall be
limited and monitored by the Permittee as specified below:
PARAMETERS
EFFLUENT LIMITS
MONITORING
REQUIREMENTS
Monthly
Daily
Measurement
Sample Type
Sample Locationl .
Average
Maximum
Frequency
Flow
Weekly
Idst ntaneous
Influent or
Effluent
Total Suspended
30 mg/L
45 mg/L
2/Month`
Grab
Effluent
Solids SS
H 2
WeeklyZ
\_GGr b
Effluent
Total Residual
28 µg/L
12'/Month
Grab
Effluent
Chlorine 3
{,
\
Total Copper
Quarterly
Grab
Effluent
Footnotes:
1. Upstream = at least 50 feet upstrea4f
2. pH shall not fall below 6.0 nor exceed'
3. Limit and monitoring apply only if the
discharged. The Division shalllconsi&
compliance with the,permit. -However
reported by a North Carolina c
below 50 µg/L. \ �,
Effluent
A (3) CHRONIC TOXI
NCAC 02B .0200_ e%sea.l
rom`the outfall. Downstream = at or near NCSR 1313.
9 0�,Slandard units. ,
facility adds, chlorine or' chlorine derivatives to water that is
�r all effluent TRC values reported below 50 µg/L to be in
the P,erinittee�shallmcontinue to record and submit all values
laborat`ory�(including field certified), even if these values fall
FOR OUTFALL 001 (QUARTERLY) [15A
The effluent discharge'shallat no time exhibit observable inhibition of reproduction or significant
mortality to CerrodapAaia,dubia'at an effluent concentration of 45 %.
The permit holder shall perform at'a minimum, quarterl monitoring using test procedures outlined in the
"North Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised December 2010, or
subsequent versions or "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure"
(Revised- December 2010) or subsequent versions. The tests will be performed during the months of
March, June, September, and December. These months signify the first month of each three-month
toxicity testing quarter assigned to the facility. Effluent sampling for this testing must be obtained during
representative effluent discharge and shall be performed at the NPDES permitted final effluent discharge
below all treatment processes.
If the test procedure performed as the first test of any single quarter results in a failure or ChV
below the permit limit, then multiple -concentration testing shall be performed at a minimum, in
Page 4 of 8

PV
Permit NCO034860
each of the two following months as described in "North Carolina Phase II Chronic Whole
Effluent Toxicity Test Procedure" (Revised -December 2010) or subsequent versions.
All toxicity testing results required as part of this permit condition will be entered on the Effluent
Discharge Monitoring Form (N1R-1) for the months in which tests were performed, using the parameter
code TGP3B for the-pass/fail results and THP313 for the Chronic Value. Additionally, DWR Form AT-
3 (original) is to be sent to the following address:
Attention: North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1623 Mail Service Center
Raleigh, North Carolina 27699 1623
Completed Aquatic Toxicity Test Forms shall be filed with the Waate Sciences Section no later than 30
days after the end of the reporting period for which the reportj made.
Test data shall be complete, accurate, include all suppo
er g chemical/physical measurements and all
concentration/response data, and be certified by laboratory supervisor and ORC 'oor approved designate
signature. Total residual chlorine of the effluent toxicity sample must be measured5and reported if
chlorine is employed for disinfection of the waste stream
Should there be no discharge of flow fro-
9 during a month in which toxicity monitoring is
required, the permittee will complete the �ifoirmationdocated at-,th8�t?p of the aquatic toxicity (AT) test
form indicating the facility name, permit number, pipe number, count , and the month/year of the report
with the notation of "No Flow' -' the comment area of°the form. The report shall be submitted to the
Water Sciences Section at the addreited aboveX/ z
Should the permittee fail to monitor during a month in,which toxicity monitoring is required, monitoring
will be required during the following month. Assessmen of toxicity compliance is based on the toxicity
testing quarter; which is ,the three mo'nth_dme interval th begins on the first day of the month in which
toxicity testing -required by this perrriit and on ues unottl the final day of the third month.
Should any�tesit,.data from dh s monitorin r`eq�uirement or tests performed by the North Carolina Division
of Water Resources indicate potential impacts to the receiving stream, this permit may be re -opened and
modified to include alternate monitorinLy reaturements or limits.
NOTE: Failure to achieve' st conditions as specified in the cited document, such as minimum control
organism survival, miuimuri' control organism reproduction, and appropriate environmental controls, shall
`V
constitute an invalid test and`wai quire immediate follow-up testing to be completed no later than the last
day of the month following the month of the initial monitoring.
A. (4) ELECTRONIC REPORTING OF DISCHARGE MONITORING REPORTS [G.S.
143-215.1(b)]
Proposed federal regulations require electronic submittal of all discharge monitoring reports (DMRs) and
specify that, if a state does not establish a system to receive such submittals, then permittees must submit
DMRs electronically to the Environmental Protection Agency (EPA). The Division anticipates that these
regulations will be adopted and is beginning implementation in late 2013.
Page 5 of 8

'414 Permit NC0034860
NOTE: This special condition supplements or supersedes the following sections within Part II of this
permit (Standard ConditionsforlVPDES Permits):
1.
• Section B. (11.) Signatory Requirements
• Section D. (2.) Reporting
• Section D. (6.) Records Retention
• Section E. (5.) Monitoring Reports
Beginning no later than 270 days from the effective date of this`permit, the permittee shall begin
reporting discharge monitoring data electronically using the.xNC,D�WR's Electronic Discharge
Monitoring Report (eDMR) internet application. �.' f,,
Monitoring results obtained during the previous mond
submitted electronically using eDMR. The eDMR sysi
monitoring data and submit DMRs electronically using
eDMR application is compliant with EPA's Cross--lVlec
(CROMERR), permittees will be required to submit al
electronically using eDMR and will be -required to cony.
signing, an and submitting one signed original and a copy
followingaddress:
NC DENR / DWR / Information Pi
ATTENTION: Central Files-/.�eDM
1617 Mail Service Center �4
Raleigh, North Carol zia�'276699-1 � 7
If a permittee is unable to u`se the eD.
being physically lo`cated`in an area wb
and discharge monitoring
forms approved by the D:
above.
Unit
(s) shall be'summarized for each month and
;m allows permitted facilities to enter
the internet. Until such time that the state's
is Electronic Reporting Regulation
dischar* ,Q oring data to the state
),lele the eDMR submission -by printing,
Df�the'computer printed eDMR to the
Sue to a demonstrated hardship or due to the facility
r101'percent of the households have broadband
i,electronic reporting requirements may be granted
on paper DMR forms (MR 1, 1. 1, 2, 3) or alternative
d copies shall be submitted to the mailing address
Requests for temporary\waiver' fro'm the NPDES electronic reporting requirements must be
submitted in writing td,the�Division for written approval at least sixty (60) days prior to the date the
facility would be required�under this permit to begin using eDMR. Temporary waivers shall be valid
for twelve (12) months and shall thereupon expire. At such time, DMRs shall be submitted
electronically to the Division unless the permittee re -applies for and is granted a new temporary waiver
by the Division.
Information on eDMR and application for a temporary waiver from the NPDES electronic reporting
requirements is found on the following web page:
htW: / /portal.ncdenr.o-tg/web /wq/admin/bog/ipu/edmr
Page 6 of 8

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Permit NCO034860
Regardless of the submission method, the first DMR is due on the last day of the month following the
issuance of the permit or in the case of a new facility, on the last day of the month following the
commencement of discharge.
2. Signatory Requirements [Supplements Section B. (11) (b) and supersedes Section B (11.)
All eDMRs submitted to the permit issuing authority shall be signed by a person described in Part II,
Section B. (11.) (a) or by a duly authorized representative of that person as described in Part II, Section
B. (11.)(b). A person, and not a position, must be delegated signatory authority for eDMR reporting
purposes.
3.
For eDMR submissions, the person signing and submitting th;DMR must obtain an eDMR user
account and login credentials to access the eDMR system. Fot.more information on North Carolina's
eDMR system, registering for eDMR and obtaining an eDMR us r account, please'visit the following
web page:
Certification. Any person submitting an electron
the following certification [40 CFR 122.22]. NO
WILL BE ACCEPTED:
"I cent i, 'under penally of lazy, that this docu
in accordance zzrith a system designed to assure
submitted. Based on my inquiry of the person
gathering the information,�the`infor titian suE
complete. I am aware thdt tberi?ar�esign#ian,
and imprisonment for knounng violations'
MR using the state's
_4` r
attachments vez
d personnel prof
50.manaFe then
to the
system shall make
ERTIFICATION
prepared under my direction or supervision
zlygather and evaluate the information
tem�or those persons directly re. ponsible for
ozziledg� and belief, true, accurate, and
information, including the possibility of fines
The pern ttee-shall,x ain records of all Discharge Monitoring Reports, including eDMR submissions.
These records or cop ies�shall be�nained for a p Hod, of at least 3 years from the date of the report.
This pen6d.may be extended _ regtz se rof.the Director at any time [40 CFR 122.41].
Page 7 of 8

Permit NC0034860
Schneider Mills WWTP
Facility Location (not to scale)
Alexander County
Latitude:
352 56' 13" N Permitted Flow: 0.75 MGD
X '
Longitude:
81211' 28" W Stream Class: C
Receiving Stream:
Drainage Basin:
Muddy Fork Creek HUC: 03050101
Catawba River Basin Sub -Basin: 03-08-32
N -
State Grid:
D14NW/Taylorsville
NPDES Permit NCO034860
Page 8 of 8

PV
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
DIVISION OF WATER RESOURCES
NPDES Permit No. NCO034860
Facility Information
Applicant/FacilityApplicant/Facility Name
Schneider Mills, Inc.
Applicant Address
P.O. Box 519, Ta lorsville, North Carolina 28610
Facility ress
1170 Hwy 16 North
flow MGD
0.75 (Outfall 001); Outfall 002 not limited
te
Outfall 001: Industrial process wastewater
Outfall 002: WTP Filter Backwash
Class II, Major / Renewal
sin /County
Catawba Basin /Alexander County
Miscellaneous
Receiving Stream
Muddy Fork Creek
303 d Listed? ..
Not listed
Stream Classification
C
Subbasin
03-08-32
Drainage Areas . mi.
8.0
S-D it HUC
03050101
Summer 7Q10 cfs
1.4
State Grid
D 14 NW
Winter 7Q10 (cfs)
2.2
USGS To o Quad
Taylorsville, NC
30Q2 (cfs) ; .
3.0 ,
Location:
Long. 81' 1 P 28"
Lat. 350 56' 13"
Average Flow cfs
8.8
Regional Office
Mooresville
[WC (%)
45% (outfall 001)
2.06% (outfall 002)
Permit Writer
Date:
Teresa Rodriguez
7/10/2015
Summary:
Schneider Mills, Inc. has requested renewal of permit NCO034860 to discharge treated process wastewater and
filter backwash to Muddy Fork Creek. Schneider Mills is a synthetic textile weaving manufacturing facility
discharging process wastewaters and filter backwash through two separate outfalls. Outfall 001 is the discharge
of treated process and sanitary wastewaters. Outfall 002 is the discharge of the sand filters backwash.
This facility is subject to 40 CFR 410, Textile Mills Point Source Category, Subpart C - Low Water Use
Processing Subcategory. The manufacturing processes include air jet weaving, water jet weaving and fiber
sizing. Production is estimated at 1,100,000 lb/month, or 45,833 lb/day based on a 6 day workweek.
Water for the manufacturing process is pumped from Muddy Creek to a pond, then it is gravity feed to 6
Microfloc® filters to remove solids. Filtered water is pumped to a storage tank for use in the jet weaving process.
The filters are backwashed daily. The backwash water is discharged to two ponds in series and then discharged
to Muddy Creek. Soda ash is occasionally added to the system for pH control. No other additives are used.
The manufacturing process generates wastewaters from the weaving machines. Sanitary wastes and stormwater
are also directed to the wastewater treatment plant. The waste treatment facility consists of a bar screen, flow
measurement, aeration basin, secondary clarifier, cascade aeration, sludge digester, and sludge drying beds. The
permitted flow is 0.78 MGD but the Authorization to Construct (ATC) issued in 1983 authorizes the construction
of a 0.75 MGD treatment system. The permitted flow should represent the approved design flow of the facility
therefore the flow limit in the permit will be corrected to 0.75 MGD.
Receiving Stream:
The discharge is to Muddy Creek in the Catawba River Basin, subbasin 03-08-32, HUC 0305101. Muddy Creek
(A.U.-11-69-4) is listed as impaired in the 2014 (d) list for mercury fish tissue, benthos and fish community.
NPDES Permit NCO034860

Permit limits development:
J
Outfall 001:
Level B models were run in 1983, 1988, and 1992 to verify that proposed BOD limits calculated from effluent
guidelines will not contravene the water quality standard for instream dissolved oxygen. The BOD limits have
been expressed in both concentration (mg/1) and load (lb/d) throughout the history of this permit. The current
permit has a BOD limit of 193.2 lb/d and 29.6 mg/l monthly average. These limits were calculated in 2005 based
on production (42,000 lb/1000 lb). In 2010 higher limits were calculated based on production but the permit was
renewed with the same limits as before based on BPJ and citing anti backsliding.
Some of the old models were . done when the permit had 5 outfalls and no ammonia limit. To verify the
assimilative capacity and to determine the maximum BOD concentration that protects the DO standard in the
stream a level B model was developed. The model included two downstream discharges, Carolina Glove
(NC0034967) and the Town of Taylorsville (NC0026271). Under permitted conditions for the three facilities a
BOD concentration of 29 mg/l for Schneider Mills will protect the DO in the stream, therefore this concentration
should be considered the water quality based limit (WQBEL). If limits calculated based on production are higher
than this concentration the limit should be set as 29 mg/1.
Technology Based Effluent Limits (TBELS) Calculations:
The limits in Table 2 are based on production of 45,833 lb/day and the effluent guidelines in §410.32 Water Jet
Weaving. Since there is sanitary wastewater stream the building block approach will be used to calculate limits.
Table 1. TBELS
Pollutant
BPT Limitation
§410.23
lb/1000 lb
Daily Maximum
Limit
lb /d
BPT Limitation
§410.23
lb/1000 lb
Monthly Average
Limit
lb/d
BOD5
8.9
489.5
4.6
253
COD
21.3
1171.5
13.7
753.5
TSS
5.5
302.5
2.5
137.5
Sanitary wastes are estimated at 10,000 gal/day.
Table 2. Sanitary Loads
Pollutant
Daily Max
Daily Max
Monthly Aver
Monthly Aver
(mg/1)
Ib/d
(mg/1)
(lb/d)
BOD
45
3.8
30
2.5
TSS
45
3.8
30
2.5
Table 3. Total Allowable Loads:
Pollutant
Daily Max
lb/d
Monthly Aver
lb/d
BOD5
411.7
213.3 (35.1 mg/1)
COD
976.2
627.9
TSS
255.8
117.1
NPDES NCO034860

PV
Table 4. Existin ro osed Limits and Monitoring:
Existing Limits
Proposed Limits
Pollutant
Daily Max
Monthly Ave
Daily Max
Monthly Ave
Basis for Condition
Limit
Limit
Limit
Limit
BOD5
373.81b/d
193.21b/d
43.5 mg/1(272
29 mg/1
(57.5 m 1)
(29.6 m 1)
lb/d
(181 lb/d)
WQBEL
COD
894.6lb/d
575.41b/d
976.2lb/d
627.91b/d
TBEL
TSS .
231.01b/d
105.0 lb/d
255.8 lb/d
117.1 lb/d
TBEL
Ammonia
WQBEL, DWR
(summer)
9.5 mg/1
1.9 mg/1
9.5 mg/1
1.9 mg/1
ammonia toxicity
policy
Ammonia
WQBEL, DWR
(winter)
23.5 mg/1
4.7 mg/1
23.5 mg/1
4.7 mg/l
ammonia toxicity
policy
pH
6 to 9 SU
6 to 9 SU
WQBEL, NCAC 15A
2B .0200
Dissolved
5 mg/1 daily average
5 mg/l daily average
WQBEL, NCAC 15A
Oxygen
213 .0200
Total
Phosphorus
Monitor
Monitor
NCAC 15A 02B .0508
Total Nitrogen
Temperature
Monitor
Monitor
NCAC 15A 2B .0200
DMR/Compliance Review:
DMR data were reviewed for the period of January 2011 to February 2015 and are summarized in Table 4.
During this period the facility received four NOVs for the dissolved oxygen limit violations at outfall 001 (April,
May and June 2014).
Table 5. DMR Summary Outfall 001
Parameter
Average
Maximum
Minimum
Flow (MGD)
0.3'02
0.511
0.004
°C
16.8
26
7.1
-Temperature
Dissolved Oxygen (m 1)
6.2
8.9
4.0
COD (lb/d)
152
473
53
BOD (lb/d)
16.7
101
< 4
BOD m 1
5.7
33.4
< 2
H (S.U.)
6.8
7.2
6.2
Total Nitrogen (m 1)
2.6
7.64
0.4
Total Phosphorus m 1
1.21
3.72
0.4
Ammonia (mg/1)
0.3
1.9
< 0.2
TSS (m 1)
34
99
< 8
WET:
The permit requires a quarterly chronic ceriodaphnia at 46%. The facility passed all the tests during this permit
cycle. The concentration for the test was modified from 46% to 45% to reflect the correct IWC.
Priority Pollutant Analysis:
The applicant submitted results for the pollutants listed in Form 2C - Part C. Bis(2-ethyl-hexyl)phthalate was
detected at 6.019 µg/1. This parameter was detected at a much lower concentration than the water quality criteria
for human health which is 1.2 µg/l.
NPDES NCO034860

Outfall 002:
The limits and monitoring conditions for outfall 002 are based on the conventional WTP permitting guidance.
The treatment system is a simple sand filter to remove suspended solids. Since the only additive occasionally
used for the WTP is caustic soda the conditions will be revised. Aluminum and iron will be removed from the
monitoring requirements since no Alum or Iron sulfate are added in the process.
RPA:
Reasonable potential was evaluated for copper, zinc, and iron. Copper has reasonable potential to exceed the
action level standard. Quarterly monitoring will be maintained in the permit for copper. Monitoring for zinc will
be eliminated from the permit.
WET:
The permit requires a quarterly chronic ceriodaphnia at 2.1%. The facility passed all the tests during this permit
cycle. The whole effluent toxicity test requirement will be removed from this outfall as is not a requirement for
sand filter systems and they have demonstrated that the effluent does not represent a toxicity issue.
Compliance review:
No notices of violations have been issued for this outfall.
Table 6. DMR Summary Outfall 002
Parameter
Average
Maximum
Minimum
Flow (MGD)
0.019
0.019
0.019
TSS m 1
6.3
13.6
3.1
H (S.U.)
7
8.7
6.1 .
TRC (µg/l)
15.3
35
< 20
Aluminum (m 1)
0.35
1
0.13
Total Iron (m 1)
0.25
1.3
0.08
Total Zinc ( 1)
13.6
47
< 10
Total Manganese (mg/1)
0.062
0.34
0.01
Total Copper ( 1)
< 5
11
< 5
Instream Monitoring:
Instream monitoring is required for conductivity, temperature, turbidity, and dissolved oxygen. Analysis of the
instream monitoring data indicates that facility has no significant negative effects on the receiving stream water
quality.
Proposed Changes:
1. Permitted flow was corrected to 0.75 MGD to be consistent with the approved ATC.
2. Limits for COD and TSS modified in the permit to reflect current production.
3. Limits for BOD were modified to water quality limits. The calculated technology based limit is less
stringent than the water quality limit.
4. Aluminum and iron will be removed from the monitoring requirements for outfall 002 since no Alum or
Iron sulfate are added in the process.
5. As a result of a reasonable potential analysis zinc will be eliminated from the monitoring requirements at
outfall 002.
6. WET test will be eliminated from outfall 002. requirements.
7. A special condition was added with requirements for electronic DMR reporting.
NPDES NCO034860

PV
Proposed Schedule for Permit Action:
Draft Permit to Public Notice: July 15, 2015
Permit Scheduled to Issue: September 7, 2015
State Contact:
If you have any questions on any .of the above information or on the attached permit, please contact Teresa
Rodriguez at (919 807-6387.
Signature Date 7/14/2015
NPDES NCO034860