NC0021156_Permit Issuance_20110711

NPDE:i DOCUWENT !;CANNINO COVER SHEET
NPDES Permit:
NC0021156
Mount Holly WWTP
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Renewal Application
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
July 11, 2011
This document is printed on reuse paper -ignore any
content on the reszerse side

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Beverly Eaves Perdue
Governor
CDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Coleen H. Sullins
Director
Mr. James Friday, Utility Director
City of Mount Holly
P.O. Box 406
Mount Holly, North Carolina 28120
Dear Mr. Friday: ,
July 11, 2011
Dee Freeman
Secretary
Subject: Issuance of NPDES Permit
Permit No. NCO021156
Mount Holly WWTP
Facility Class IV
Gaston County
Division personnel have reviewed and approved your application for renewal of 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 (or as subsequently amended).
The final permit authorizes the City of Mount Holly to discharge wastewater from the Mount
Holly WWTP to the Catawba River, a class WS-IV CA water in the Catawba River Basin. The
permit includes discharge limitations/or monitoring for flow, BOD5, ammonia nitrogen, total
suspended solids (TSS), dissolved oxygen, total residual chlorine, fecal coliform, copper, silver,
total nitrogen, total phosphorus and other parameters.
Please note that the receiving stream, Catawba River, is listed as an impaired waterbody
on the 2010 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.
The following procedure has been implemented by DWQ: Total residual chlorine (TRC)
compliance level changed to 50 ug/L Effective March 1, 2008, the Division received EPA
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
Location: 512 N. Salisbury St. Raleigh, North Carolina 27604
Phone: [phone] FAX: [phone] Customer Service:1-877-623-6748 One
Internet: www.nr.waterquality.org NOrthCarohna
An Equal Opportunity 1 Affirmative Action Employer 4 � ghtrally

Letter to Mr. Friday
Page 2
approval to allow a 50 ug/L TRC compliance level. This change is due to analytical difficulties
with TRC measurements. Facilities will still be required to report actual results on their
monthly discharge monitoring report (DMR) submittals, but for compliance purposes, all TRC
values below 50 ug/L will be treated as zero. A footnote regarding this change has been added
to the effluent limitations page in the permit.
Please note that the facility class of the Mount Holly WWTP has been corrected from
Class III to Class IV .
The following modifications included in the May 11th draft permit remain in the final
permit. .
The addition of effluent limitations for total nitrogen and total phosphorus with effective
dates for compliance. The City was notified by DWQ on September 1, 2009 that upon
NPDES permit renewal, nutrient limits would be incorporated into the permit so that the
1996 Lake Wylie TMDL (Total Maximum Daily Load) would be fully implemented. These
effective dates will allow the City of Mount Holly time to develop a plan for compliance
with the total nitrogen (TN) and total phosphorus (TP) limits. A summer total nitrogen
limit will be required from April 1 through October 31 only and the limit will be 64,200
lb/summer. This TN limit must be met starting April 1, 2017. A year round total
phosphorus limit of 18,250 lb/year will be effective starting January 1, 2014. Special
conditions regarding the nutrient allocations, the total nitrogen and phosphorus limits
and the method for calculation of nutrient loads have also been added to the permit.
A monthly average limit of 12 ng/1 and a daily maximum limit of 36 ng/1 for total
mercury will be added to the permit based on the results of the reasonable potential
analysis. North Carolina has a statewide mercury impairment of all streams and based
on EPA guidance and recommendation, all dischargers must be protective of the mercury
standard of 12 ng/1 at the end of the 'effluent pipe without allowance for stream dilution.
Mount Holly should use the most sensitive testing method, EPA Method 1631E, when
sampling for all mercury discharges.
• Quarterly monitoring for antimony and dichlorobromomethane will be added to the
permit based on the results of a reasonable potential analysis. Per current Division
procedure for the evaluation of reasonable potential data, the maximum predicted
concentrations for antimony and dichlorobromomethane indicated that additional
monitoring in the permit is required.
• Effluent monitoring for total copper and total silver will remain in the permit based on
the results of the reasonable potential analysis. The analysis indicated the potential to
exceed water quality action level standards instream. Based on new Division
procedures, both parameters will now be monitored quarterly to coincide with the whole
effluent toxicity test. Quarterly monitoring in this permit will provide sufficient data
collection for evaluation during the 2015 permit renewal.
• The daily maximum limit of 22 ug/L for cyanide will be removed from the permit. A
reasonable potential analysis of submitted effluent data indicated there was no longer
the potential to exceed the water quality standard instream. Cyanide should continue to
be monitored quarterly in the pretreatment long term monitoring program.

` xtter o Mr. Friday
Page 3
Effluent monitoring for total zinc will be removed from the permit. A reasonable potential
analysis of submitted effluent data indicated there was no longer the potential to exceed
the water quality action level standard instream. Zinc should continue to be monitored
quarterly in the pretreatment long term monitoring program.
If any parts, measurement frequencies or sampling requirements contained in this permit are
unacceptable to you, you have the right to an adjuilicatory 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 a demand is made, this permit shall be final and binding.
Please take notice that this permit is not transferable. 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, Coastal Area Management Act, or any other Federal or Local
governmental permits may be required.
If you have any questions or need additional information, please contact Ms. Jacquelyn
Nowell at telephone number [phone].
Sincerely,
H. Sullins
v r:
Attachments li
cc: NPDES File/NC0021156
Mooresville Regional Office/Surface Water Protection Section (ecopy)
EPA Region IV/attn: Pamala Myers
ESS/Aquatic Toxicology Unit (ecopy)
PERCS/Monti Hassan (ecopy)
Central Files

i NPDES Permit No. 0NCO021156
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,
City of Mount Holly
is hereby authorized to discharge wastewater from a facility located at
Mount Holly WWTP
Broome Street, Mount Holly
Gaston County
to receiving waters designated as the Catawba River within the Catawba 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 August 1, 2011.
This permit and authorization to discharge shall expire at midnight February 28, 2015.
Signed this day July 11, 2011.
Co en H. Sullins, Director
Division of Water Quality
By Authority of the Environmental Management Commission

• NPDES Permit No. NCO021156
.' a p
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.
City of Mount Holly is hereby authorized to:
'f
1. Continue discharging 4.0 MGD of treated domestic and industrial wastewater
from an activated -sludge wastewater treatment facility consisting of:
r� • manually cleaned influent bar screen,
v • dual grit chambers,
IAJ
'7
• Parshall flume with instrumented flow measurement,
• flow equalization basin,
• three aeration basins with mechanical aeration, C
dual secondary clarifiers, Q�: )
• dual chlorine contact chambers with gas chlorination,
• four sludge holding tanks
/.
dechlorination
• dual sludge holding tanks not in use - formerly clarifiers that have been
g g ( Y
replaced)
• dual sludge drying beds (not in use),
The facility is located at the Mount Holly WWTP, 201 Broome Street, Mount
Holly, Gaston County;
2. Continue to discharge from said wastewater treatment works through Outfa11001
to the Catawba River (see attached tnap), a stream classified as WS-IV CA waters
within the Catawba River Basin.
0 ti

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�U1011 L Y�'
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e csrdf n •�r
WT
i
U�stream Sample 1't
Ri II ��' 7
Mount Holly WWTP j
Outfa11001 ;
4
W
_npL'W;
�%instrcani Sample-Poi7
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1
City of Mount Holly
Facility
Mount Holly WWTP
Location
Latitude: 350 15' 55" N State Grid/Ound: F 14 SE / Mt. Holly, NC
not to scale
-
Longitude: 81000' 35" W Permitted Flow: 4.0 MGD
NPDES
Permit No. NC0021156
Receivine Stream: Catawba River Drainage Basin: Catawba River Basin
North
m
StreaClass: WS-N CA Sub-Basin/HUC: 03-08-33/0305010114
Gaston Co"

` ` NPDES Permit No. NCO021156'
WV
A. (I.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - FINAL
During the period beginning on the effective date of the permit and lasting until expiration, the
Permittee is authorized to discharge through Outfall 001. Such discharges shall be limited and
monitored by the Permittee as specified below:
PARAMETERS
EFFLUENT LIMITS
MONITORING
REQUIREMENTS
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Fre uenc
Sample
Type
Sample
Location'
Flow MGD
4.0-
Continuous
Recordi fig
I or E
Total Monthly Flow (MG) 7
Monitor & Report
Monthly
Recorded
or
Calculated
I or E
BOD, 5 day, 20°C 2
30.0 mg/L
45.0 mg/L
Daily
Composite
E, I
Total Suspended Solids SS 2
30.0 mg/L
45.0 mg/L
Daily
Composite
E, I
NH3 as N
3/Week
Composite
E
Fecal Coliform(geometric mean
200 100 ml
400 100 ml
Daily
Grab
E
Total Residual Chlorine RC 3
28 µg/ L
Daily
Grab
E
Dissolved Oxygen4
Daily
Grab
E
Temperature °C
Daily
Grab
E
H5
Daily
Grab
E
TKN (mg/L) 6
Monitor & Report
Weekly
Composite
E
NO3-N + NOa-N (mg/L) 6
Monitor & Report
Weekly
Composite
E
Total Nitrogen (mg/L) 6,7
Monitor & Report
Weekly
Composite
E
TN Load ?
Monitor & Report (lb/mo)
Monthly
Calculated
E
64,200 (lb/summer) $
Seasonally
Calculated
E
Total Phosphorus (mg/L) 7
Monitor & Report
Weekly
Composite
E
TP Load 7
Monitor & Report (lb/mo)
Monthly
Calculated
E
18,250 lb/yr 8
Annually
Calculated
E
Chronic Toxicity9
Quarterly
Composite
E
Total Mercury
12 n 1
36 n 1
\ Monthly
Grab
E
Dichlorobromomethane
1 Quarterly
Composite
E
Total Antimony
Quarterly
Composite
E
Total Copper
Quarterly
Composite
E
Total Silver
-
_
Quarterly
Composite
E
Temperature, °C
Variablel0
Grab
U, D
Conductivity
Variablel0
Grab
U, D
Dissolved Oxygen
Variable10
Grab
U, D
Effluent Pollutant Scan 11
Annual
See A. (6)
E
Footnotes:
1. Sample Locations: E — Effluent; I — Influent; U — Upstream at Hwy 27 Bridge; D — Downstream, just
below Hwy 29/74 bridge.
2. Monthly average effluent concentrations for Biochemical Oxygen Demand (BOD5) and•TSS shall not
exceed 15% of respective influent values (i.e. the facility shall achieve 85% removal).
3. The Division shall consider all effluent total residual chlorine values reported below 50ug/L to be in
compliance with the permit. However, the Permittee shall continue to record and submit all values
reported by a North Carolina certified laboratory (including field certified), even if these values all
below 50 ug/L.
4. The daily average dissolved oxygen effluent concentration shall not be less than 5.0 mg/ L.
5. pH shall not fall below 6.0 nor exceed 9.0 standard units.

► NPDES Permit No. NCO02115,6,. ►
6. For a given wastewater sample, TN = TKN + NO3-N + NO2-N, where TN is Total Nitrogen, TKN is Total
Kj eldahl Nitrogen, and NO3-N and NO2-N are Nitrate and Nitrite Nitrogen, respectively.
7. TN (or TP) Load is the mass quantity of Total Nitrogen (or Total Phosphorus) discharged in a given
period of time. See Special Condition A.(4.), Calculation of Nutrient Loads.
8. The TP Load limit shall become effective January 1, 2014, and the TN Load limit shall become
effective April 1, 2017. Compliance with these limits shall be determined in accordance with Special
Condition A.(3.) Total Nitrogen and Total Phosphorus Limits.
9. Chronic Toxicity (Ceriodaphnia) at 6 %; quarterly during February, May, August, and November (See
Special Condition A. (5.)
10. Variable: permittee shall sample upstream and downstream 3/week during summer months of June, July,
August, and September, weekly during the rest of the year.
11. See Special Condition A. (6.)
Effluent shall contain no floating solids or foam visible in other than trace amounts.

NPDES Permit No. NCO021156
SUPPLEMENT TO EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
SPECIAL CONDITIONS
A. (2). NUTRIENT ALLOCATIONS
(a.) -The following table lists the Total Nitrogen- (TN) and Total Phosphorus (TP) allocations assigned
to, acquired by, or transferred to the Permittee in accordance with the 1995 Lake Wylie TMDL
and nutrient management strategy and the status of each as of permit issuance. For compliance
purposes, this table does not supersede any TN or TP limit established elsewhere in this permit.
Total Nitrogen Allocation
ALLOCATION
TYPE
SOURCE
DATE
DISCHARGE
ALLOCATION
STATUS
Base
Assigned in TMDL
1995
64,200 lb
Active
TOTAL
64,2001b
Active
Footnote:
1 In accordance with the 1995 TMDL, nitrogen allocation applies to the summer
season, which is defined as April 1 - October 31.
Total Phosphorus Allocation
ALLOCATION
TYPE
SOURCE
DATE
DISCHARGE
ALLOCATION
STATUS
Base
Assigned in TMDL
1995
18,250 lb
Active
7-
TOTAL
18,250lb
Active
Footnote:
In accordance with the 1995 TMDL, phosphorus allocation applies on a calendar
year basis, January 1 - December 31.
(b.) Any addition, deletion, or modification of the listed allocation(s) (other than to correct
typographical errors) or any change in status of any of the listed allocations shall be considered a
major modification of this permit and shall be subject to the public review process afforded such
modifications under state and federal rules.
A.(3). TOTAL NITROGEN AND TOTAL PHOSPHORUS LIMITS
(a.) Total Nitrogen (TN) allocations and load limits for NPDES dischargers in the Lake Wylie
watershed are seasonal limits and apply to the summer season, which is defined as April 1
through October 31 of each year. Total Phosphorus (TP) allocations and load limits are annual
limits and apply on a calendar year basis.
(b.) The TN (or TP) Load limit in this Permit may be modified as the result of allowable changes in
the Permittee's allocation.
(i.) Allowable changes include those resulting from the purchase, sale, trade, or lease of
allocation between the Permittee and other dischargers assigned allocation under the 1995
Lake Wylie TMDL; regionalization (if both facilities were assigned allocation); and other
transactions approved by the Division.

NPDES Permit No. NCO021156 r t
(ii.) The Permittee may request a modification of the. TN (or TP) Load limit in this Permit to
reflect allowable changes in its allocation.
(A) Upon receipt of timely and proper application, the Division will modify the permit as
appropriate and in accordance with state and federal program requirements.
(B) Changes in TN limits become effective on the first April 1 following permit
modification, and those for TP become effective on January 1 of the year following
permit modification. The Division must receive application no later than 180 days
prior to the requested effective date for any limit change.
(iii.) Any requests for modification should be sent to:
NCDENR/ DWQ/ NPDES Programs
1617 Mail Service Center
Raleigh, NC 27699-1617
A. (4). CALCULATION OF NUTRIENT LOADS
(a.) The Permittee shall calculate monthly, seasonal, and annual nutrient loads as follows:
(i.) Monthly TN (or TP) Load (lb/mo) = TN (or TP) x TMF x 8.34
where:
TN or TP = the average Total Nitrogen or Total Phosphorus concentration
(mg/ L) of the composite samples collected during the month
TMF = the Total Monthly Flow of wastewater discharged during the
month (MG/mo)
8.34 - conversion factor, from (mg/L x MG) to pounds
(ii.) Summer TN Load (lb/summer) = Sum of the April -October Monthly TN
(iii.) Annual TP (or TN) Load (lb/yr) = Sum of the 12 Monthly TP (or TN) Loads for the calendar
year
(b.) The Permittee shall report monthly Total Nitrogen and Total Phosphorus results (mg/ L and
lb/mo) in the appropriate discharge monitoring report for each month; the summer TN results
with that year's October DMR; and each calendar year's results (lb/yr) with the December report
for that year.

NPDES Permit No. NCO021156
A. (5.) CHRONIC TOXICITY PERMIT LIMIT (QUARTERLY)
The effluent discharge shall at no time exhibit observable inhibition of .,reproduction or significant mortality to
Ceriodaphnia dubia at an effluent concentration of 6 %.
The permit holder shall perform at a minimum, guarterly monitoring using test procedures outlined in the "North Carolina
Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised February 1998, or subsequent versions or "North Carolina
Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or subsequent versions. The tests will
be .performed during the months of February, May, August, and November. Effluent sampling for this testing 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 each of the two following months, as
described in "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998)
or subsequent versions.
The chronic value for multiple concentration tests will be determined using the geometric mean of the highest concentration
having no detectable impairment of reproduction or survival and the lowest concentration that does have a detectable
impairment of reproduction or survival. The definition of "detectable impairment," collection methods, exposure regimes,
and further statistical methods are specified in the "North Carolina Phase II Chronic Whole Effluent Toxicity Test
Procedure" (Revised -February 1998) or subsequent versions.
All toxicity testing results required as part of this permitconditionwill be entered on the Effluent Discharge Monitoring Form
(MR-1) for the months in which tests were performed. If reporting pass/fail results using the parameter code TGP3B, DWQ
Form AT -I (original) is sent to the below addres"s�,_If reporting Chronic Value results using the parameter code THP313,
DWQ Form AT-3 (original) is to be sent to the following address:
Attention: North Carolina Division of Water Quality
Environmental Sciences Section
1621 Mail Service Center
Raleigh, North Carolina 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, accurate, include all supporting chemical/physical measurements and all
concentration/response data, and be certified by laboratory supervisor and ORC or approved designate signature. 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 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 "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, monitoring will be required
during the following month. 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.
If the Permittee monitors any pollutant more frequently then required by this permit, the results of such monitoring shall be
included in the calculation & reporting of the data submitted on the DMR & all AT Forms submitted.
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 No. NC0021156 , ,
R
A. (6.) EFFLUENT POLLUTANT SCAN
The permittee shall perform an annual Effluent Pollutant Scan for all parameters listed in the table below (in accordance with
40 CFR Part 136). The annual effluent pollutant scan samples shall represent seasonal (summer, winter, fall, spring) variations
over the 5-year permit cycle. Unless otherwise indicated, metals shall be analyzed as "total recoverable." Additionally, the
method detection level and the minimum level shall be the most sensitive as provided by the appropriate analytical
procedure.
Ammonia (as N)
Trans-1,2-dichloroethylene
Bis (2-chloroethyl) ether
Chlorine (total residual, TRC)
1,1-dichloroethylene
Bis (2-chloroisopropyl) ether
Dissolved oxygen
1,2-dichloropropane
Bis (2-ethylhexyl) phthalate
Nitrate/Nitrite
1,3-dichloropropylene
4-bromophenyl phenyl ether
Kjeldahl nitrogen
Ethylbenzene
Butyl benzyl phthalate
Oil and grease
Methyl bromide
2-chloronaphthalene
Phosphorus
Methyl chloride
4-chlorophenyl phenyl ether
Total dissolved solids
Methylene chloride
Chrysene
Hardness
1,1,2,2-tetrachloroethane
Di-n-butyl phthalate
Antimony
Tetrachloroethylene
Di-n-octyl phthalate
Arsenic
Toluene
Dibenzo(a,h)anthracene
Beryllium
1, 1, 1 -trichloroethane
1,2-dichlorobenzene
Cadmium
1,1,2-trichloroethane
1,3-dichlorobenzene
Chromium
Trichloroethylene
1,4-dichlorobenzene
Copper
Vinyl chloride
3,3-dichlorobenzidine
Lead
Acid -extractable compounds:
Diethyl phthalate
Mercury (Method 1631 E)
P-chloro-m-cresol
Dimethyl phthalate
Nickel
2-chlorophenol
2,4-dinitrotoluene
Selenium
2,4-dichlorophenol
2,6-dinitrotoluene
Silver
2,4-dimethylphenol
1,2-diphenylhydrazine
Thallium
4,6-dinia -o-cresol
Fluoranthene
Zinc
2,4-dinitrophenol
Fluorene
Cyanide
2-nitrophenol
Hexachlorobenzene
Total phenolic compounds
4-nitrophenol
Hexachlorobutadiene
Volatile oceanic compounds:
Pentaehlorophenol
Hexachlorocyelo-pentadiene
Acrolein
Phenol
Hexachloroethane
Acrylonitrile
2,4,6-trichlorophenol
Indeno(1,2,3-cd)pyrene
Benzene
Base -neutral compounds:
Isophorone
Bromofonn
Acenaphthene
Naphthalene
Carbon tetrachloride
Acenaphthylene
Nitrobenzene
Chlorobenzene
Anthracene
N-nitrosodi-n-propylamine
Chlorodibromomethane
Benzidine
N-nitrosodiinethylamine
Chloroethane
Benzo(a)anthracene
N-nitrosodiphenylamine
2-chloroethylvinyl ether
Benzo(a)pyrene
Phenanthrene
Chloroform
3,4 benzofluoranthene
Pyrene
Dichlorobromomethane
Benzo(ghi)perylene
1,2,4-trichlorobenzene
1,1-dichloroethane
Benzo(k)fluoranthene
1,2-dichloroethane
Bis (2-chloroethoxy) methane
Test results shall be reported to the Division in DWQ Form- A MR-PPAI or in a form approved by the
Director within 90 days of sampling. The report shall be submitted to the following address: Division of
Water Quality, Surface Water Protection Section, Central Files,1617 Mail Service Center, Raleigh, North
Carolina 27699-1617.

Nowell, Jackie
From: [e-mail]
Sent: Monday, May 23, 2011 9:02 AM
To: Nowell, Jackie; Berry, Ron; Vinzani, Gil
Cc: Belnick, Tom; [e-mail]
Subject: EPA Region 4 completed review of 3-draft NPDES permits -No
Comments notice
Good Morning all,
I have completed my review of the 3-draft NPDES permits recently sent to Region 4.
NC0001074, Mount Olive Pickle Co., Inc. WWTP
NC0021181, City of Belmont WWTP
NC0021156, Mount Holly WWTP
This is your notice of no comments.
Please proceed with issuance of these permits at your earliest convenience, and please
forward a copy of the final permit(s) with the signed cover page of the permit.
Thank you for the opportunity to review these permits. As always, should any substantial
changes be made to these drafts prior to issuance, please allow EPA an opportunity to review
those changes.
Sincerely,
Pamala Myers
Pamala Myers
404.562.9421
myers.namala(@epa.eov
Environmental Engineer and Technical Advisor I Pollution Control and Implementation Branch
Water Protection Division I Municipal and Industrial NPDES Section U.S. EPA, Region 4 1 61
Forsyth St. SW I Atlanta, GA 30303
1

Beverly Eaves Perdue
Governor
MEMORANDUM
PWA
4
NCDENR
North Carolina Department of Environment and
Division of Water Quality
Coleen H. Sullins
Director
Natural Resources
' Office
May 11, 2011
To: Britt Setzer
NC DENR / DEH / Public Water Supply Section Regional Enginttef` `` J" PIY
Mooresvillelit alOffice
From: Jackie Nowell
Complex Pemuttutg Unit
Subject Review of Draft NPDES Permit NC0021156
City of Mount Holly WWI?
Gaston County
Dee Freeman
Secretary
Please indicate below your agency's position or viewpoint on the proposed general permit and return this form by
May 25, 2011. If you have any questions on the general permit, please contact me at 919-807-6386 or e-mail to
[e-mail].
RESPONSE: (Check one)
c�
■
RaaRRRRPPRaRRRRRRRRRRaPaRRaRRRRRRRRRRRaaR
Concur with the issuance of this permit provided the facility is operated and maintained properly, the stated effluent
limits are met prior to discharge, and the discharge does not contravene the designated water quality standards.
Concurs with issuance of the above permit, provided the following conditions are met
❑ Opposes the issuance of the above permit, based on reasons stated below, or attached: I W
1617 Mail Service Center. Raleigh, North Carolina 27699-1617
Location: 512 N. Salisbury St Raleigh, North Carolina 27604
Phone: [phone] FAX: 919-807&1921 Customer Service: 1-877-623-6748
Intemet www.ncwaterquality.org
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The Charlotte Observer Publishing Co.
Charlotte, NC
North Carolina ) ss Affidavit of Publication
Mecklenburg County)
THE CHARLOTTE OBSERVER
NCDENR/DwD/POINT SOURCE
1617 MAIL SERVICE CENTER
RALEIGH NC 27699
REFERENCE: 40509745 D SPRINKLE
018446/6569337 NPDES/BELMONT/MT HOL
Before the undersigned, a Notary Public of said
County and State, duly authorized to administer
oaths affirmations, etc., personally appeared,
being duly sworn or affirmed according to law,
doth depose and say that he/she is a
representative of The Charlotte Observer
Publishing Company, a corporation organized and
doing business under the laws of the State of
Delaware, and publishing a newspaper known as The
Charlotte Observer in the city of Charlotte,
County of Mecklenburg, and State of North Carolina
and that as such he/she is familiar with the
books, records, files, and business of said
Corporation and by reference to the files of said
publication, the attached advertisement was
inserted. The following is correctly copied from
the books and files of the aforesaid Corporation
and Publication.
PUBLISHED ON: 05/13
AD SPACE: 62 LINE
FILED 0jlr� 06/02/11
In Test
day and
Memtmamem CommiseioryNPUES Uni[
1617 Mail Service Gaoler
PewgM1, NC 27�r}1917
Notice of lnlent to lssne a WDES Weatewater Pennil
The NOM cemlina Fsrvvenmenral Memo.nl Cornrn ti n
oro ✓) „� �aoNPOFS wasteweler diWmige permit W IM1e
---L�-C.R-T(iLE:
DATE:
hereunto set my hand and affixed my seal, the
My ComftWw Expims May 17. 2016
My Commission Expires: _/_/_
has epplbo mr mrrewal of t
g W fNe Catawba Awer in ma
ar

Nowell, Jackie
From: Templeton, Mike
Sent: Monday, May 09, 2011 5:15 PM
To: Nowell, Jackie
Subject: RE: TN/TP language for Mt Holly
Jackie - The main change I would suggest is to re -arrange it a little to improve the flow of the paragraph. I hope this
is helpful, let me know if you have questions. — Mike T
Nutrient Limits and Related Requirements. In its September 1, 2009 letter, the Division
notified the City that it would receive nutrient limits at permit renewal in order to
complete the implementation of the 1996 Lake Wylie Nutrients TMDL (Total Maximum
Daily Load). The draft permit includes an annual total phosphorus (TP) limit of 18,250
pounds per calendar year and a total nitrogen (TN) limit of 64,200 pounds per summer
season (April 1-October I), consistent with the TMDL. The TP limits are scheduled to
become effective starting January 1, 2014, and the TN limit starting April 1, 2017. We
believe these effective dates will allow the City of Mount Holly time to plan for and
complete the plant improvements necessary to meet these limits. The permit also
includes special conditions regarding the City's nutrient allocations and limits and the
methods for calculating and reporting its mass nutrient loads.
From: Nowell, Jackie
Sent: Friday, May 06, 2011 1:46 PM
To: Templeton, Mike
Subject: RE: TN/TP language for Mt Holly
Monday is fine, Ron and I are peer reviewing each other's permits... language change will probably be put in both letters
From: Templeton, Mike
Sent: Friday, May 06, 2011 1:39 PM
To: Nowell, Jackie
Subject: RE: TN/TP language for Mt Holly
Jackie - I need to dig out my notes and refresh my memory on this one. Can I get you something on Monday? Also, can
you send me the full cover letter? Thanks. — Mike T
From: Nowell, Jackie
Sent: Friday, May 06, 2011 11:45 AM
To: Templeton, Mike
Subject: TN/TP language for Mt Holly
Mike, if you have time to review this I'd appreciate. If not, let me know. This is the cover letter language that I'm
putting in Mt Holly permit.... do I need to add some additional language, clarifying that the limit is mass based, etc.
• The addition of effluent limitations for total nitrogen and total phosphorus with effective
dates for compliance. The City was notified by DWQ on September 1, 2009 that upon
NPDES permit renewal, nutrient limits would be incorporated into the permit so that the
1996 Lake Wylie TMDL (Total Maximum Daily Load) would be fully implemented. These

Jackie
effective dates will allow the City of Mount Holly time to develop a plan for compliance
with the total nitrogen (TN) and total phosphorus (TP) limits. A summer total nitrogen
limit will be required from April 1 through October 1 only and the limit will be 64,200
lb/summer. This TN limit must be met starting April 1, 2017. A year round total
phosphorus limit of 18,2501b/year will be effective starting January 1, 2014. Special
conditions regarding the nutrient allocations, the total nitrogen and phosphorus limits
and the method for calculation of nutrient loads have also been added to the permit.
2

4
Lake Wylie d.1schargers w/ nutrient limits
My U i
Pemit Number
Facility Name
TN Limit fxVc
TP Limit
Comments
NCO006033
A
,
�' �J�`4
Town of Cramerton
1 103,282 #/yr
mg/i (mo. avg.)
TN given in #/yr to help Cramerton w/compliance, Inc JPS (TN=8.4 mg/1)
NCO020184
Gastonia -Long Creek
tb 6 mg/I (summer only)
1 mg/I (mo. avg.)
NCO074268
t-
Gastonia - Crowders Creek 0 6 mg/I (summer only)
1 mg/i (mo. avg.)
NCOOD4812
Pharr Yams
1 13,698 #/yr (at 0.5 MW
1522 #/yr (at 0.5 MGD)
Industrial facility given nutrient loadings
NCO004812
Pharr Yams
1 27,397 #/yr (at 1.0 MGD)
3044 #/yr (at 1.0 MGD)
Industrial facility given nutrient loadings
too
NCO0004375
Cladant
o� 318.5 #/day
40 #/day
nutrient limits are 12 month roiling averages
NCO021156
Mount Holly
monthly monitoring
monthly monitoring
TMDL limits of TN= 6 mg/l (summer only) and TP =1 mg/I (mo. avg)
equivalent load: TN= 300 #/d (summer) and TP= 50 #/d
NCO021181
Belmont
monthly monitoring
monthly monitoring
TMDL limits of TN= 6 mg/1 (summer only) and TP =1 mg/I (mo. avg)
equivalent load: TN= 350 #/d (summer) and TP= 58 #/d
NCO025861
Lowell
quarterly monitoring only
quarterly monitoring only
NCO00209M
Spencer Mountain WWTP quarterly monitoring only
quarterly monitoring only
NCO020052
McAdenville
quarterly monitoring only
quarterly monitoring only
NCO005177
FMC Lithium
quarterly monitoring only
quarterly monitoring only

Holly Facility
(NC0004375)
Catawba
Mt. Holly
4.0
9.1
3.3
Currently
River
WWTP
(304)
(110)
discharges at
(mainstem)
(NC0021156)'
these levels -
no limits
6.0
'6.0
1.0
These limits
(300)
(50)
will be given
during next
permitting
cycle.
Belmont
5.0
15.0
8.3
Currently
WWTP
(624)
(345)
discharges at
(NC0021181)
these levels -
no limits.
7.0
1.0
These limits
( ll0)
(50)
will be given
during next
permitting
cycle.
Crowders Cr.
Gastonia
6.0
'6.0
1.0
Crowders
(300)
(50)
Creek WWTP
(NC0074268)
' April - October TN Limit
2008 Recommendations
DWQ will appropriately place Lake Wylie in categories 1(t) and 3(t) of the Integrated Report to the EPA
in order to reflect no criteria exceeded or not enough data for chlorophyll -a and the presence of an
approved TMDL. It is important to note that just because the lake is no longer impaired for
chlorophyll -a, the TMDL is still in effect. It appears that the existing strategy is currently sufficient to
address nutrient loading into the lake as long as nutrient loading does not exceed the TMDL allocations.
However, continued eutrophication concerns within the arms of Lake Wylie suggest that the nutrient
management strategy may not be sufficient in the future to maintain the TMDL load allocations. For
example, in the original strategy discharges above Long Creek (a South Fork Catawba River tributary)
were not given individual allocations.
Given the evidence of potential nutrient enrichment problems in the arms of the take, DWQ will ensure
that no fewer than 10 samples are collected at each of the take monitoring stations and that all
nutrient data is collected for those 10 samples during the 2012 normal lake assessment cycle.
Temporary AMS sites will be reestablished near USGS gage stations to better assess these parameters
with flow. It is also recommended that all Major NPDES Dischargers monitor their effluent as well as
upstream and downstream weekly for total phosphorus and total nitrogen. And, all Minor NPDES
Dischargers should monitor their effluent as well as upstream and downstream monthly (if not already
required to monitor more frequently) for total phosphorus and total nitrogen. Due to the historic
eutrophication issues in the lake and elevated chlorophyll -a concentrations in the arms of the lake, this

data is needed to ensure that the TMDL allocated loads are not exceeded. This will help prevent the
lake from becoming impaired for chlorophyll-o again in the future.
Over the next basinwide cycle, DWQ will consider the need to expand the management area to include
Long Creek, which flows into the South Fork Catawba River. DWQ will also determine whether all other
existing permits within the management area should be explicitly included in the nutrient management
strategy as mentioned above. In the meantime, DWQ supports and encourages the continued efforts of
municipalities and county governments to identify and implement local nonpoint source reduction plans
and wastewater treatment plant upgrades.

7
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2010 FACTSHEET INFO
PPA REvIEws
8/2009—NO SEMIVOLATIVE ORGANICS DETECTED
ANTIMONY-39 UG/L
COPPER —9.1 UG/L
SELENIUM-1.5 UG/L
ZINC —55 UG/L
.✓PHENOLICS — 14 UG/L (METHOD 420.4)
VOLATILE ORGANIC COMPOUNDS BY GC/MS
BROMODICHLOROMETHANE — 4.2 UG/L
CHLOROFORM- 3.2 UG/L
5/2009
3/2009
DIBROMOCHLOROMETHANE-2.8 UG/L
ANTIMONY — 32 UG(L
ARSENIC— 1.5 UG/L v
COPPER —6.4 UG/L
✓SELENIUM-2.9 UG/L`"
XC — 66 UG/L
NOLICS — 10 UG/L (METHOD 420.4)
VOLATILE ORGANIC COMPOUNDS BY GC/MS
BROMODICHLOROMETHANE— 1.1 UG/L
CHLOROFORM- 1.1 UG/L
ANTIMONY-37 UG/L
COPPER-7.5 UG/L
ZINC-90 UG/L
DMR REviEws
5/2010
EFFLUENT
HG- <0.0001— PCS CODE 71900
4HG-3:5T' PCSCODE 71980
CU- 7.2, l6 UG/L
ZN — 46, 64 UG/L
t SE- 2 UG/L
✓MBAS-130 UG/L
ALL OTHER DATA BELOW DETECTION
2/2010
HG- <0.000I—PCs CODE 71900
,4,HG-7.82 NG/L—PCS CODE 71980
✓MBAS —240 UG/L
Cu- 77,12 UG/L
ZN —27, 42 UG/L
11/2009
/ CR- 7.6 UG/L
'JHG— I1-1 NG7L-PCS CODE 71980
SSE- 1.2 UG/L t
/MBAS —120 UG/L
8/2009
✓ HG-8.57 NG/L—PCs CODE 71980
SE- 3.3 UG/L
dMBAS — 1.8 MG/L INF ALSO 1.8 MG/L
Fact Sltcct
Rene\ud -- NPDES NCOU? 1 156
Paee 7

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FIGURE 4-1 S: LAKE WYLIE CHLOROPHYLL a TMDL MANAGEMENT AREA
Go
6
4
OLake Wylie TMDLAma
Major NPDES NAY Discharge
�
p
� Industrial Process 8 Commercial
Municipal, Large
C4
4
4°C�
4
Minor NPDESWWDIscharge
na
♦ ♦
♦ IndusWal Process &Commercial
A
Wp m ♦
♦ Municipal,<1MGD
Crtxk
♦
p 100%Domestic<iMGD
7Cmwd
f+
C
Car`
♦ Water TreaMent Plant
See e�
°tT�O
Ambient Monitoring Sites
^
0 NC Ambient
4k
0 Gasmn CountyAmbient
* Lake Site
ad g,
2010 Use Support Rating
Atli,,
Suppoifng
Data Inconclusive
No Data
U
1.. Impaired
0 2
4 6
8
Miles \link
SC Hydrology
2010 Recommendations
DWQwill appropriately place Lake Wylie in categories 1(t) and 3(t) of the Integrated Report to the EPA in order to reflect
no criteria exceeded or not enough data for chlorophyll a and the presence of an approved TMDL. It is important to note
that just because the lake is no longer impaired for chlorophyll a, the TMDL is still in effect. It appears that the existing
strategy is currently sufficient to address nutrient loading into the lake as long as nutrient loading does not exceed
the TMDL allocations. However, continued eutrophication concerns within the arms of Lake Wylie suggest that the
nutrient management strategy may not be sufficient in the future to maintain the TMDL load allocations. Far -example,
Given the evidence of potential nutrient enrichment problems in the arms of the lake, DWQ is currently working on
a monitoring plan to collect nutrient samples across the management area. This additional monitoring will assist in
reevaluating nutrient loads during the upcoming planning cycle. It is also recommended that all Major NPDES Dischargers
monitor their effluent weekly for total phosphorus and total nitrogen. And, all Minor NPDES Dischargers should monitor
their effluent monthly (if not already required to monitor more frequently) for total phosphorus and total nitrogen. Due
to the historic eutrophication issues in the lake and elevated chlorophyll a concentrations in the arms of the lake, this
data is needed to ensure that the TMDL allocated loads are not exceeded. This will help prevent the lake from becoming
impaired for chlorophyll a again in the future.
Over the next basinwide cycle, DWQ will consider the need to expand the management area to include Long Creek,
which flows into the South Fork Catawba River. DWQ will also determine whether all other existing permits within
the management area should be explicitly included in the nutrient management strategy as mentioned above. In the
meantime, DWQ supports and encourages the continued efforts of municipalities and county governments to identify and
implement local nonpoint source reduction plans and wastewater treatment plant upgrades.
4.26 DRik FT

'y6e;p
Lake Wylie Action Plan Et TMDL Evaluation
Eutrophic conditions in Lake Wylie and several of its major tributaries have been evident for many years. To address
eutrophication in Lake Wylie, DWQ and South Carolina DHEC developed a nutrient control strategy for the Lake Wylie
watershed. In 1996, EPA approved the Lake Wylie TMDL, including the point source allocation included in the Lake Wylie
Nutrient Management Plan. The Lake Wylie Nutrient Management Area (Figure 4.18) is considered to be Lake Wylie and
its tributaries including the Catawba River and its tributaries below Mountain Island Dam and the South Fork Catawba
River below its confluence with Long Creek.
Current Conditions
TABLE 4-11: CHLOROPHYLL
Data from the most recent lake assessment period indicate that nutrient enrichment a LEVELS FOR 2007
continues to be a major concern in (both) the North and South Carolina portions of the
lake. Samples showed that total phosphorus levels were highest at the lake station on
the South Fork arm. And, all four stations monitored within North Carolina had moderate South Fork d 40%
nitrogen levels and elevated chlorophyll -a levels. Even though there were no chlorophyll Catawba Cr. 50%
a exceedances, except for Crowders Creek (SC), all arms of the lake had chlorophyll a Crowders Cr. 90%
concentrations greater than 25 pg/l in at least 40% of the samples (Table 4.11). This
indicates that, although there are currently no exceedances of the chlorophyll a standard, Allison Cr. 40%
there may be emerging localized eutrophication issues in the arms of the lake. The
mainstem arm of the lake had lower nutrient levels comparatively, with no chlorophyll a concentrations greater than 25
Ng/L. The Crowders Creek sample site (SC-CTB198B5) is located five miles downstream of the NC/SC state line, at which
two chlorophyll a samples were over the North Carolina standard of 40 pg/l. Multiple samples at this site were over SC
standards for chlorophyll a (40 ug/l), total phosphorus (0.06 mg/l) and total nitrogen (1.5 mg/l) as well.
Chlorophyll a TMDL Evaluation
The Lake Wylie chlorophyll a TMDL was recently evaluated to determine if dischargers listed within the TMDL were
in compliance with the individually assigned waste load allocations (see Table 4-12). According to the limited data
collected during this planning cycle, facilities that have permitted nutrient limits are meeting given allocations. Those
facilities include Gastonia's Long Creek WWTP and the Crowders Creek WWTR Three other facilities in the original TMDL
have closed. Mount Holly and Belmont WWTP's will both receive limits as per the TMDL during the next permitting cycle.
TABLE 4-12: TMDL POINT SOURCE WASTE LOAD ALLOCATIONS
TRIBUTARY
DISCHARGER
FLOW
TN, MG/L
TP, MG/L
NOTES
Gastonia's Long Creek WWTP
16.0
'6.0
1.0
(NCO020184)
(801)
(133)
South Fork
JPS
4.0
8.8
2.7
Inactive, Cramerton (NC0006033)
(NCG500169)
(293)
(90)
took over the JPS allocations and
limits went into effect in 2009.
Mt. Holly WWTP (NCO021156)
4.0
'9.0
1.5
These limits will be given during
Catawba River
(300)
(50)
the 2010 permitting cycle.
(mainstem)
Belmont WWTP (NC0021181)
5.0
'8.4
1.4
These limits will be given during
(350)
(58)
1 the 2010 permitting cycle.
Crowders Cr.
Gastonia Crowders Creek
6.0
'6.0
1.0
wWTP (NC0074268)
(300)
(50)
• April - October TN Limit
0
0
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NOTE TO SELF
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-- -- - REQUIRE FOLLOW -Up
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TO BE FILED
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DENR/DWQ
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
NPDES No. NC0021156
Facility Information
-Applicant/Facility Name:
City of Mount Holly / Mount Holly W WTP
Address:
P.O. Box 406,131 South Main Street Mount Holly NC 28120
-Applicant
Address:
201 Broome Street, Mount Holly NC 28120
-Facility
Permitted Flow
4.0 MGD(Facility Class III facility)
of Waste:
Munici al domestic and industrial wastewater
-Type
Facility/Permit Status:
Renewal
Coun :
Gaston
SUM.'\iARY
This facility is a major municipal treatment plant operating in Gaston County. The current design
capacity is 4.0 MGD and serves a population of 9,835 people. The facility has a full pretreatment
program with four (4) significant industrial users. It is recommended that the pretreatment
program be continued in the next permit renewal.
RECEIVING STREAM
The Mount Holly WWTP discharges into the Catawba River just upstream of Lake Wylie. The flow
of the Catawba River is regulated by releases from the Duke Energy hydroelectric dams.
Historically the 7Q10 stream flow estimate of 95 cfs at the Mount Holly discharge has been based
on the minimum instantaneous release from Mt. Island Lake dam (80 cfs) plus tributary inflow
from Dutchmans Creek (15 cfs). The 30Q2 flow estimate of 716 cfs is based on an USGS estimate
in 1993 that was computed from Duke Power Mt. Island Lake discharge data. In the final 2010
303d list of impaired streams in North Carolina, the Catawba River from Mountain Island Lake
Dam to Interstate Highway 85 Bridge at Belmont is impaired for low pH. The Mount Holly
W WIP discharges into this segment of the Catawba River.
There is an existing TMDL for Lake Wylie for chlorophyll a which was completed by DWQ in
1995. This TMDL determined that Mount Holly would receive nutrient limits for TP and TN
upon expansion to 6 MGD. Information at that time indicated that the Mount Holly WWTP
expansion from 4 MGD to 6 MGD would occur within a few years of the TMDL implementation.
To date, Mount Holly has not expanded and no nutrient limits had been assigned to the WWTP.
DWQ determined during the Catawba River Basin management plan review that the Lake Wylie
TMDL was not fully implemented without TP and TN limits being gi-en to Mount Holly (and the
Mount Holly WWTP Fact Sheet
NPDES Rene\ral
1'aee 1

Town of Belmont WWTP). In September 2009, DWQ notified Mount Holly that nutrient limits
would be assigned during this permit renewal. It was further clarified that Mount Holly would be
given an adequate compliance schedule to allow for construction, chemical addition, etc.
Pretreatment notes indicate that the facility is currently preparing for nutrient limit implementation.
Based on the Lake Wylie TNMI , Mount Holly would receive a TN limit of 6 mg/1 in the summer
months (April through October) and a year round TP limit of 1 mg/l. A conversion of these
concentration limits to mass (load) limits is 300 lb/day TN and 50 lb/day TP. This would be equal
to 64,200 lb/summer for TN (300 lb/day x 214 days (Apr -Oct) and 18, 250 lb/pear for TP (50
lb/day x 365 days/year). These limits have been placed in this renewal permit with a
compliance date of January 1, 2014 for TP and a compliance date of April 1, 2017 for TN.
Special conditions have also been added to the permit clarifying the inclusion of TN and
TP limits.
TOXICITY TESTING:
Type of Toxicity Test: Chronic P/F
Existing Limit: 001: Chronic P/F @ 6%
Recommended Limit: 001: Chronic P/F @ 6%
Monitoring Schedule: February, May, August, and November
This facility has passed all quarterly chronic toxicity tests since January 2006. It is recommended
that the chronic toxicity test @ 6% be continued in this permit renewal.
COMPLIANCE SUMMARY:
DMRs have been reviewed for the period January 2004 through March 2010. The facility overall
has been consistently meeting its permit limits. There have been two instances in the past with
meeting the cyanide daily maximum limits (March 2006 and 2007). However there have been no
cyanide violations since 2007.
The last two compliance evaluation inspections of the plant have found it to be compliant.
INSTREAM MONITORING:
Instream monitoring is required for temperature, dissolved oxygen, and conductivity.
Upstream site: Highway 27 Bridge
Downstream site: Just below Highway 29/27
Instream data was reviewed for summer months (April -October) for 2007, 2008, and 2009. An
analyses of DO and temperature data showed that the facility has no significant negative impact on
the water quality in the receiving stream. There were a couple of reported daily DO values below 5
mg/l both upstream and downstream of the facility, however there were no DO monthly averages
< 5 mg/l for the past three years.
Instream temperature values never exceeded 32 degrees although there was one instance of 32
degrees reported in August 2007.
It is recommended that instream monitoring for the parameters: temperature, DO, and
conductivity be continued.
REASONABLE POTENTIAL ANALYSIS
Reasonable potential analyses were conducted for cyanide, and metals based on sampled data in the
discharge monitoring reports (DMRs) from January 2007 through May 2010. Data from
Pretreatment Long Term Monitoring Plan (LTMP) was included in the submitted DMRs. Based
on minimal data in the annual pollutant scans, a reasonable potential analysis was also run for
chloroform, antimony and dichlorobromomethane. See attached RPA.
Mount I lollVw\1'FP Fact Shcct
NI DFS IZcnc\\al
Pau2

• Zinc- maximum predicted value demonstrated no reasonable potential to exceed state
water quality action level standards. No effluent monitoring will be required in the permit.
f
Zinc will continue to be monitored quarterly in the pretreatment long term monitoring
program.
• Cyanide — Maximum predicted value demonstrated no reasonable potential to exceed the
chronic and acute allowable concentrations. The daily maximum limit of 22 ug/l will be
dropped from the permit. Cyanide will continue to be monitored quarterly in the
pretreatment long term monitoring program.
• Antimony — Maximum predicted value did not demonstrate a reasonable potential to
exceed the chronic allowable concentration based on the federal criteria. However the
maximum predicted value was greater than 50% of the allowable concentration and per
new Division procedure for evaluation of RPA results, quarterly monitoring should be
added to the permit.
• Copper and silver - Maximum predicted values for both parameters demonstrated a
reasonable potential to exceed both the chronic and acute allowable_ concentrations.
However, these are both action level standards and are reviewed in conjunction with
toxicity testing results. The facility has passed all toxicity tests within the past five years,
therefore copper toxicity is not a problem. It is recommended that quarterly monitoring
for copper and silver be given 'in the permit. Based on new DWQ procedures, quarterly
monitoring will be given for action level parameters that show reasonable potential.
• Dichlorobromomethane — There was limited data for the RPA however the maximum
predicted values, did show reasonable potential to exceed the chronic allowable
concentrations. Based on current DWQ guidance, although RP was shown because it was
a limited dataset of < 8 datapoints, quarterly monitoring will be required in the permit.
• Mercury -Based on the statewide mercury impairment in NC streams, EPA has
recommended that RPA for mercury be performed without allowing dilution. Therefore
based on this criteria, maximum predicted values demonstrated a reasonable potential to
exceed the chronic allowable of 12 ng/l. Based on current DWQ guidance for mercury
discharges, a monthly average limit of 12 ng/1 and a daily maximum limit of 36 ng/1 will be
applied.
• MBAS (methylene blue activated substances)- Maximum predicted value did not
demonstate a reasonable potential to exceed the chronic allowable concentration based on
the NC standard. Based on new DWQ guidance, no monitoring will be required in the
permit. Quarterly monitoring will be removed from the permit.
Existing limits and recommended limits/monitorin are summarized in the table below:
Parameter
Existing Limit /L
E�usting :
Monitorin
Proposed Limit /L
Proposed
Monitorin
Total Co � er.
None
2/month
None
Quarterly
Total Silver
None
Monthly
None
Quarterly
Total 'Zinc
None
2/month
None
LTMP
Cyanide :
22 u /L
Weekly
None
LTMP
Antimony
None
None
None
Quarterly
Dichlorobromo
methane
None
None
None
Quarterly
Mercury
None
None
12' n /l/36 n /1
Monthly
MBAS
None
Quarterly
None
None
MOLIM Holly WWTP Fact Shcet
NPDES Renewal
Pace 3

PROPOSED PERMIT CHANGES:
1) Quarterly monitoring added for antimony and dichlorobromomethane.
2) Twice per month monitoring for zinc dropped. Will be maintained in LTMP.
3) Twice per month monitoring for copper changed to g'aarterly in the permit.
4) Monthly monitoring for silver changed to quarterly in the permit.
5) Limit for cyanide will be removed from the permit based on the results of the RPA
which showed no reasonable potential to exceed the water quality standard instream. This
parameter will continue to be monitored in the pretreatment LTMP.
6) Limit for mercury will be added to the permit based on RPA results. -Mo. avg limit
of 12 ng/1 and daily maximum limit of 36 ng/1 will be put in permit.
7) Quarterly monitoring for MBAS will be removed from the permit.
8) TN and TP load limits will be added to the permit based on the Lake Wylie Nutrient
Management Strategy.
9) TRC compliance level changed to 50 ug/l. Narrative footnote will be added to
permit.
10) Weekly monitoring for TKN, NO3-N and NO2-N will be added to the permit to
help with calculation of TN load limit.
11) Monthly monitoring for TN and TP will be changed to weekly and used to calculate
TN and TP load limits.
PROPOSED SCHEDULE FOR PERMIT ISSUANCE:
Draft Permit to Public Notice: May 11, 2011
Permit Scheduled to Issue: July 5, 2011 (tentative)
Effective Date of the Permit: August 1, 2011 (tentative)
STATE CONTACT:
If you have any questions on any of the above information or on the attached permit, please
contact J uelyn M. owe t 919-807-6386 or jackie.nowell@ncd nr.gov.
NA DATE: S Z0
NAME: DATE:
SUPERVISOR: DATE:
klount Flolly Wtiti'TP Fact Sheet
\PDES Reiie al
PaL,e 4

Mount Holly WWTP
NCO021156
Qw (MGD) =
1Q10S (Cfs) =
7Q 10S (Cfs) =
7Q10W (Cfs) =
30Q2 (Cfs) =
Avg. Stream Flow, QA (Cfs) =
Receiving Stream:
REASONABLE POTENTIAL ANALYSIS
4.00 WWTP/WTP Class: IV
77.60 1WC @ 1Q10S = 7.40%
95.00 1WC @ 7Q10S = 6.13%
95.00 IWC@ 7Q10W= 6.13%
716.00 lWC @ 30Q2 = 0.86%
3016.00 1WC @ QA = 0.21%
Catawba River Stream Class., WS-IV CA
Outfa* 001
Qw=4MGD
PARAMETER
TYPE
STANDARDS & CRITERIA (2)
�
m
f-
REASONABLE POTENTIAL RESULTS
RECOMMENDED ACTION
(1)
o.
z
NC WaS I Chronlc Applied Standard % FAV/Acute
n # DOL Uax prod Cw Allowable Cw
Acute: NO WQS
Arsenic
C
50 FW(7010s)
ug/L
16 8
9.4
__ _ ___-_-_ ____
__-_-_-________
Chronic: 816
No RP, Predicted Max < 50°% of Cw - No Monitoring
Arsenic
C
10 HH(Qavg)
ug/L
16 8
9.4
No value > Allowable Cw _ _
required_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Chronic: 4,762
No RP, Predicted Max < 50% of Cw - No Monitoring
No value > Allowable Cw
required
Acute: NO WQS
Beryllium
NC
6.5 FW(7010s)
ug/L
0 0
NIA
_ _-_-__ _ ------------------------------
Chronic: 106.0
Acute: 202.7
Cadmium
NC
2 FW(7010s) 15
ug/L
14 0
1.8
_ _-_-_-_
-_____-_-_-_______________
Chronic: 32.6
No RP, Predicted Max < 50°% of Cw- Na Monitoring
No value > Allowable Cw
required
Acute: NO WQS
Chlorides
NC
250.000 WS(7010s)
ug/L
0 0
N/A
---------------------------------------------
Chronic: 4,078,303
Acute: 13.811
Chromium
NC
50 FW(7Q10s) 1,022
ug/L
14 10
21.6
__ _ _-_-_-_ __
__________-_-_______-_____
Chronic: 816
No RP, Predicted Max < 50% of Cw - No Monitoring
No value > Allowable Cw
required
Acute: 98.6
Copper (AL)
NC
7 FW(7010s) 7.3
ug/L
81 81
396.0
_-_-_-_ _ -----------------------------
Chronic: 114.2
RP for AL(Cu,Zn,Ag,Fe,CI) - apply Quarterly
1 values > Allowable Cw
Monitoring in conjunction with TOX Test
Acute: 297
Cyanide
NC
5 FW(7010s) 22
10
ug/L
180 54
32.2
_ _-_-___
______-_-_-______________
Chronic: 81.6
No RP, Predicted Max < 50°% of Cw - No Monitoring
No value > Allowable Cw
required
Acute: NO WQS
Fluoride
NC
1.800 FW(7010s)
ug/L
0 0
N/A
_ ------------------------------
Chronic: 29,364
Acute: 456.8
Lead
NC
25 FW(7Q10s) 33.8
ug/L
14 2
7.3
__ _ _-_____ _ __
__-_-___-_-___-_-_-_______
Chronic: 407.8
No RP, Predicted Max < 50°% of Cw - No Monitoring
No value > Allowable Cw
required
21156rpanewest2010hhv2.xlsm, rpa
Page 1 of 2 5/4/2011

Mount Holly WWTP REASONABLE POTENTIAL ANALYSIS Outfall 001
NCO021166 Qw = 4 MGD
Acute: NO WQS
Chlorinated Phenolic Compounds
NC
1 A(3002)
10
ug/L
0 0
NIA
_ _
--Chronic-----_ --
--------------------------
116_.3
Acute: NO WQS
Mercury
NC
12 FW(7010s)
0.5
ng/L
14 14
33
_
Chronic: 196
RP - apply Monthly Monitoring with Limit
No value > Allowable Cw
Acute: NO WQS
Molybdenum
NC
160 WS(7010s)
ug/L
0 0
WA
_
Chronic----- 2,610 --
— - — - — - — - — - — - — - — - — - — - — - — - —
Acute: 3.527
Nickel
NC
25 WS(30Q2) 261
ug/L
14 2
9.4
_ _ _
Chronic----- 408 ---
No RP, Predicted Max < 50% of Cw- No Monitoring
No value > Allowable Cw
required
Acute: 757
Selenium
NC
5 FW(7Q10s) 56
ug/L
14 7
17.1
_ _ _ Chro_
nic: 82
No RP, Predicted Max < 60% of Cw - No Monitoring
No value > Allowable Cw
required
Acute: 16.62
Silver (AL)
NC
0.06 FW(7Q10s) 1.23
ug/L
34 5
19.80
_ _ _ _ _ _ _ _ _ _ _ _ _8RP
_
Chronic 0 9—
for AL(Cu,Zn,Ag,Fe,CI) - apply Quarterly
34 values > Allowable Cw
Monitoring In conjunction with TOX Test
Acute: 905
Zinc (AL)
NC
50 FW(7010s) 67
ug/L
81 81
119.0
nic 816
Chro_
No RP, Predicted Max < 60% of Cw - No Monitoring
No value > Allowable Cw
required
Acute: NO WQS
MBAS
NC
500 A(3002)
ug/L
14 14
11.466.0
_
Chronic 58,139.5
_ _ _ _ _ _ _ _ _ _ _
No RP, Predicted Max < 50% of Cw • No Monitoring
No value > Allowable Cw
required
Acute: NO WQS
Phenolic Compounds
NC
300 A(3002)
ug/L
15 10
423.0
_ _ _ _3.7 _
_ronic _
_ 34,88
Ch
No RP, Predicted Max < 50% of Cw - No Monitoring
No value > Allowable Cw
required
Acute: NO WQS
Chloroform
NC
5.6 WS(7Q 10s)
ug/L
4 3
21.6
_
Note: n<12
_ _ _ _ _ _ _ _ _
Chronic 91.4
No RP, Predicted Max < 50% of Cw - No Monitoring
Limited data set
No value > Allowable Cw
required
Acute: NO WQS
Dichlorobromomethane
NC
0.55 WS(7010s)
ug/L
4 3
46.9
Note: n<12
_ _ _ _ _ _ _ _ _ _ _ _
Chronic 9.0
_ _ _ _ _ _ _ _ _ _ _ _ _ _
RPA for Limited Dataset (n<8 samples) - apply
Limited data set
No value > Allowable Cw
Quarterly Monitoring
Acute: NO WQS
Antimony
NC
5.6 WS(7Q10s)
ug/L
3 3
53.4
Note: n<12
_ _ _ _ _
Chronic 91.4
No RPA , Predicted Max z 50% of Cw - apply
Limited data set
No value > Allowable Cw
lQuarterly Monitoring
21156rpanewest2010hhv2.x1sm, rpa
Page 2 of 2 5/4/2011

Mount Holly WWTP
REASONABLE POTENTIAL ANALYSIS
NCO021156
Qw (MGD) =
4.00
WWTP/WTP Class: IV
1010S (Cfs) =
0.00
IWC @ 1Q10S = 100.00%
7010S (cfs) =
0.00
IWC @ 7Q10S = 100.00%
7Q10W (cfs) =
0.00
IWC @ 7Q10W = 100.00%
30Q2 (cfs) =
716.00
IWC @ 30Q2 = 0.86%
Avg. Stream Flow, QA (cis) =
3016.00
IWC @ QA = 0.21%
Receiving Stream:
Catawba River Stream Class: WS-IV CA
Outfail 001
Qw=4MGQ,
PARAMETER
TYPE
(1)
STANDARDS & CRITERIA (2)
o
n
N
z
:3
REASONABLE POTENTIAL RESULTS
RECOMMENDED ACTION
NC WQS / Chronk Applied S&ndmd y FAV/Acute
n 0 Dd Alai Pied Cw Allowable Cw
Acute: NO WQS
Mercury
NC
12 FW(7010s)
0.5
ng/L
14 14
33
_ _ _ _ _ _ _ _ _ _ _ _
Chronic:
_ _ _ _ _ _ _
2 values > Allowablea Cw
FRP apply Monthly Monitoring with Limit
21156rpanewest2010hhv2.xlsm, rpa
Page 1 of 1 4/26/2011

REASONABLE POTENTIAL ANALYSIS
"PASTE NO "COPY"
SPFr1A1 _ 1 • :_ r 1. ,. _.__ ____._..
Date
Data
BDL=112DL
Results
•
Date
Data
BDL=112DL
Results
-
1 May-2009
- 1.5
1.5
Std Dev.
1.1408
1
39934
0
1.5
1.5
Std Dev.
1.1408
2 Aug-2009
_
1.3
1.3
Mean
2.0000
2
40026
0
1.3
1.3
Mean
2.0000
3 Feb-10
1
0.5
C.V.
0.5704
3
40210
<
1
0.5
C.V.
0.5704
4 May-10
1
0.5
n
16
4
40299
<
1
0.5
n
16
5 Nov-09
1
0.5
5
40118
<
1
0.5
6 Aug-09
1.3
1.3
Mult Factor =
2.4000
6
40026
0
1.3
1.3
Mult Factor =
2.4000
7 May-09
1
1
Max. Value
3.9 ug/L
7
39934
0
1
1
Max. Value
3.9 ug/L
8 Feb-09
5
2.5
Max. Pred Cw
9.4 ug/L
8
39845
<
5
2.5
Max. Fred Cw
9.4 ug/L
9 May-08
3.2
3.2
9
39569
0
3.2
3.2
10 Nov-08
5
2.5
10
39753
<
5
2.5
11 Aug-08
5
2.5
11
39661
<
5
2.5
12 Feb-08
li 3.8
3.8
12
39479
0
3.8
3.8
13
5
2.5
13
0
<
5
2.5
14
3.9
3.9
14
0
0
3.9
3.9
15
3
3
15
0
0
3
3
21156rpanewest2010hhv2.x1sm, data
-1 - 5/10/2011

REASONABLE POTENTIAL ANALYSIS
4
• •'
6
}
Cadmium
i
Date
Data
BDL=112DL
Results
• •
Date
Data
1
<
1
0.5
Std Day.
0.2594
1
2
<
1
0.5
Mean
0.7500
2
3
<
1
0.5
C.V.
0.3459
3
Nov-09
4
Feb-09
<
2
1
n
14
4
May-09
5
May-08
<
2
1
5
Au09
6
<
2
1
Mull Factor =
1.8000
6
Nov-08
7
<
2
1
Max. Value
1.0 ug/L
7
Aug-08
8
<
2
1
Max. Fred Cw
1.8 ug/L
8
Feb-08
9
<
2
1
9
May-08
10
<
2
1
10
11
<
1
0.5
11
12
<
1
0.5
12
13
14
<
<
1
1
0.5
0.5
13
14
15
15
Chromium
BDL=1/2DL
Results
5
2.5
Std Dev,
5
2.5
Mean
7.6
7.6
C.V.
3
3
n
5
2.5
8
8
Mult Factor=
7.9
7.9
Max. Value
9.3
9.3
Max. Fred Cw
3.8
3.8
5
2.5
9.6
9.6
8.8
8.8
7
7
6
6
5.7857
0.4913
14
2.2500
9.6 uglL
21.6 ug/L
21156rpanewest2010hhv2.xlsm, data
-2- 5/10/2011

REASONABLE POTENTIAL ANALYSIS
7
Date Data
8
Copper (AL)
BDL=1/2DL
Results
• •
Date
Data
BDL=112DL
Results
10
10
Std Dev.
20.5171
1
<
10
5
Std Dev.
Mean
13.7481
2
<
10
5
Mean
10
10
C.V.
1.4924
3
<
10
5
C.V.
14
14
n
81
4
<
10
5
n
6
6
5
<
10
5
12
12
Mult Factor =
2.2000
6
<
10
5
Mull Factor =
2
2
Max. Value
180.0 ug/L
7
<
10
5
Max. Value
10
10
Max. Pred Cw
396.0 ug/L
B
<
10
5
Max. Fred Cw
9
<
10
5
10
10
10
<
10
5
9
9
11
<
10
5
9
9
12
<
10
5
13
<
10
5
9.8
9.8
14
<
10
5
14
14
15
<
10
5
16
<
10
5
16
16
17
<
10
5
14
14
18
<
10
5
20
20
19
<
10
5
19
19
20
<
10
5
21
<
10
5
13
13
22
<
10
5
26
26
23
<
10
5
13
13
24
<
10
5
13
13
25
<
10
5
18
18
26
<
10
5
15
15
27
<
10
5
28
<
10
5
29
<
10
5
8.9
8.9
30
<
10
5
15
15
31
<
10
5
32
<
10
5
33
<
10
5
34
<
10
5
35
<
10
5
14
14
36
<
10
5
37
<
10
5
8.6
8.6
38
<
10
5
14
14
39
<
10
5
16
16
40
<
10
5
8.2
8.2
41
<
10
5
42
<
10
5
7.6
7.6
43
<
10
5
5.8
5.8
44
<
10
5
7.3
7.3
45
<
10
5
7.2
7.2
46
<
10
5
47
<
10
5
5.7
5.7
48
<
10
5
8.3
8.3
49
<
10
5
8.5
8.5
50
<
10
5
51
<
10
5
15
15
52
<
10
5
11
11
53
<
10
5
15
15
54
<
10
5
55
<
10
5
12
12
56
<
10
5
9.9
9.9
57
<
10
5
13
13
58
<
10
5
8.9
8.9
59
<
10
5
16
16
60
<
10
5
19
19
61
<
10
5
62
<
10
5
63
<
10
5
12
12
64
<
10
5
9.4
9.4
65
<
10
5
66
<
10
5
67
<
10
5
68
<
10
5
69
<
10
5
5.2722
0.3907
180
1.1500
28.0 ug/L
32.2 ug/L
21156rpanewest2010hhv2.xlsm, data
5/10/2011

REASONABLE POTENTIAL ANALYSIS
70
6.5
8.5
70
<
71
71
72
7.9
7.9
72
<
73
7.1
7.1
73
<
74
8.6
8.6
74
<
75
6.4
6.4
75
<
76
180
180
76
<
77
3.6
3.6
77
<
78
78
<
79
7
7
79
<
80
6.1
6.1
80
<
81
7.4
7.4
81
<
82
82
<
83
9.2
9.2
83
<
84
6.7
6.7
84
<
85
85
<
86
7.2
7.2
86
<
87
9.7
9.7
87
<
88
8
8
88
<
89
9
9
89
<
90
8.5
8.5
90
<
91
91
<
92
17
17
92
<
93
11
11
93
<
94
16
16
94
<
95
9
9
95
<
96
9.9
9.9
96
<
97
97
<
98
98
<
99
16
16
99
<
100
14
14
100
<
101
101
<
102
102
<
103
103
<
104
11
11
104
<
105
105
<
106
7.7
7.7
106
<
107
77
77
107
<
108
12
12
108
<
109
9.1
9.1
109
<
110
6.1
6.1
110
<
111
111
<
112
8.2
8.2
112
<
113
6.4
6.4
113
<
114
7.2
7.2
114
<
115
16
16
115
<
116
116
<
117
117
<
118
118
<
119
119
<
120
120
<
121
121
<
122
122
<
123
123
<
124
124
<
125
125
<
126
126
127
127
128
128
129
129
130
130
Mar-2007
131
131
132
132
133
133
134
134
135
135
136
136
137
137
138
138
139
139
140
140
141
141
Sep-2007
142
142
143
143
21156rpanewest2010hhv2.x1sm, data
- 2 - 5/10/2011

REASONABLE POTENTIAL ANALYSIS
144
144
7
145
145
3.7
146
146
3.3
147
147
3.7
148
148
4.
149
149
3.6
150
150
3.5
151
151
3.3
152
152
2.8
153 '*
153
3.4
154
154
5.1
155
155
4.1
156
156
4.7
157
157
4.3
158
158 Oct-2008
13
159
159
5.2
160
160
5.6
161 li
161 Oct-2008
11.
162
162
6.4
163
163
3.3
164
164
4.6
165
165
3.6
166
166
3.
167
167
3.2
168
168
2.9
169
169
3.1
170
170
4.6
171
171
7.2
172
172
2.8
173
173
6.
174
174
4.2
175
175
3.3
176
176
4.1
177
177
4.9
178
178
5.
179
179
5.8
180
180
2.9
21156rpanewast2010hhv2.xism, data
- 3 - 5/10/2011

REASONABLE POTENTIAL ANALYSIS
10
12
Lead
Mercury
Date
Data
BDL=112DL
Results
• •
Date
Data
BDL=112DL
Results
• -
1
tz'
1
0.5
Sul Dev.
0.67
1
May-10
3.57
3.57
Std Dev.
3.4702
2
Rr
0.6
0.6
Mean
1.14
2
Feb-10
7.82
7.82
Mean
8.7764
3
1
0.5
C.V.
0.59
3
Nov-09
11.1
11.1
C.V.
0.3954
4
4=
1
0.5
n
14
4
Aug-09
8.57
8.57
n
14
5
1
0.5
5
Nov-08
11.9
11.9
6
Aug-08
2.8
2.8
Mull Factor =
2.6000
6
May-09
6,68
6.68
Mull Factor =
1.9400
7
May-08
3
1.5
Max. Value
2.8 ug/L
ug/L
7
Feb-09
7,85
7.85
Max. Value
16.8
8
Nov-08
zy°,
ES:a
3
1.5
Max. Fred Cw
7.3 ug/L
ug/L
8
Aug-08
7.03
7.03
Max. Pred Cw
32.6
9
Feb-08
;'.
3
1.5
9
Feb-OB
7,44
7,44
10
1
0.5
10
May-08
4.71
4.71
11
3
1.5
11
7.14
7.14
12
1ut
2
1
12
Aug-07
13.2
13.2
13
3
1.5
13
9.06
9.06
14
3
1.5
14
16.8
16.8
15
15
21156rpanewest2010hhv2.xlsm, data
-1 - 5110/2011

REASONABLE POTENTIAL ANALYSIS
ng/L
ng/L
14
Nickel
Date
Data
BDL=1/2DL
Results
1
<
5
2.5
Std Day.
2
May-09
1.7
1.7
Mean -
3
Feb-08
<
10
5
C.V.
4
<
5
2.5
In
5
<
5
2.5
6
<
5
2.5
Mult Factor=
7
<
5
2.5
Max. Value
8
<
5
2.5
Max. Pred Cw
9
<
5
2.5
10
<
5
2.5
11
2.6
2.6
12
<
10
5
13
9
4.5
14
<
10
5
15
15
Selenium
• -
Date
Data
BDL=1/2DL
Results
1.1724
1
Aug-09
1.5
1.5
Std Dev,
3.1286
2
May-09
2.9
2.9
Mean
0.3747
3
May-10
2
2
C.V.
14
4
Nov-09
1.2
1.2
n
5
Aug-09
3.3
3.3
1.8800
6
May-09
1.2
1.2
Mult Factor=
5.0 ug/L
7
Feb-08
7
7
Max. Value
9.4 ug/L
8
Cfr:
5
2.5
Max. Fred Cw
i1E
10
j'
5
2.5
11
4
2
12
5
2.5
13
"
5
2.5
14
5
2.5
15
2.5786
0.5468
14
2.4400
7.0
17.1
_2_
21156rpanewest2010hhv2.xlsm, data
5/10/2011

REASONABLE POTENTIAL ANALYSIS
16
17
Silver (AL)
Zinc (AL)
Date Data
BDL=112DL
Results
• -
Date Data
BDL=112131-
Results
1
5
2.5
Std Dev.
1.5365
1
79.
79
Std Dev.
15.0059
2
2
1
Mean
2.4529
2
Mean
63.4815
3
2
1
C.V.
0.6264
3
50.
50
C.V.
0.2364
4
5
2.5
n
34
4
62.
62
n
81
5
3
3
5
66.
66
6
Mull Factor =
1.9800
6
71.
71
Mutt Factor =
1.1900
7
Max. Value
10.0 ug/L
7
56.
56
Max. Value
100.0 ug/L
8
5
2.5
Max. Pred Cw
19.8 ug/L
8
69.
69
Max. Fred Cw
119.0 ug/L
9
9
10
10
57.
57
11
11
45.
45
12
12
52.
52
13
11 3.4
3.4
13
14
14
48.
48
15
5
2.5
15
55.
55
16
5
2.5
16
17
17
81.
81
18
5
2.5
18
67.
67
19
5
2.5
19
66.
66
20
20
73.
73
21
5
2.5
21
22
5
2.5
22
92.
92
23
23
89.
89
24
5
2.5
24
100.
100
25
25
78.
78
26
5
2.5
26
71.
71
27
5
2.5
27
71.
71
28
5
2.5
28
29
29
30
30
94.
94
31
5
2.5
31
84.
84
32
32
33
33
34
34
35
35
36
5
2.5
36
56.
56
37
37
38
I 2.6
2.6
38
70.
70
39
5
2.5
39
66.
66
40
2.9
2.9
40
69.
69
41
41
47.
47
42
1
0.5
42
43
43
53.
53
44
5
2.5
44
59.
59
45
45
73.
73
46
5
2.5
46
37.
37
47
1
0.5
47
48
5
2.5
48
64.
64
49
49
60.
60
50
5
2.5
50
69.
69
51
1
0.5
51
52
52
84.
84
53
53
89.
89
54
5
2.5
54
100.
100
55
55
56
56
51.
51
57
57
37.
37
58
5
2.5
58
70.
70
59
59
78.
78
60
1
0.5
60
78.
78
61
5
2.5
61
70.
70
62
Apr-10 10
10
62
63
63
64
64
73.
73
65
65
50.
50
66
66
67
67
68
68
69
69
21156rpanewest2010hhv2.xism, data
-1 - 5/10/2011

REASONABLE POTENTIAL ANALYSIS
75. 75
77. 77
71. 71
92. 92
50. 50
66. 66
50. 50
65. 65
69. 69
61. 61
53. 53
38. 38
57. 57
72. 72
50. 50
61. 61
53. 53
69. 69
53. 53
62. 62
52. 52
47. 47
68. 68
54. 54
62. 62
51. 51
27. 27
42. 42
49. 49
58. 58
50. 50
49. 49
46. 46
64. 64
21156rpanewest2010hhv2.xlsm, data
- 2 - 5110/2011

REASONABLE POTENTIAL ANALYSIS
18
18
MBAS
Phenolic Compounds
Date
Data
BDL=112DL
Results
• •
Date Data
BDL=112DL
Results
i
MayAo
130
130
Std Dev.
436.1980
1
Aug-09
14
14
Std Dev.
24.1956
2
Feb-10
240
240
Mean
300.7143
2
May-09
10
10
Mean
22.1000
3
NOV-09
120
120
C.V.
1.4505
3
May-10 <
20
10
C.V.
1.0948
4
Aug-09
1800
1800
n
14
4
Feb-10 <
20
10
n
15
5
May-09
140
140
5
Nov-09 <
20
10
6
Feb-09
160
160
Mult Factor=
6.3700
6
Au09 <
20
10
Mult Factor =
4.5000
7
Aug-08
230
230
Max. Value
1800.0 uglL
7
May-09
9.3
9.3
Max. Value
94.0 uglL
8
Nov-08
110
110
Max. Pred Cw
11466.0 ug1L
8
Feb-09
4.2
4.2
Max. Pred Cw
423.0 uglL
9
May-08
320
320
9
Nov-08
49
49
10
Feb-08
210
210
10
Aug-08
41
41
11
Nov-07
280
280
11
May -GB
94
94
12
Au07
130
130
12
Nov-07
11
11
13
May-07
150
150
13
17
17
14
Feb-07
190
190
14
37
37
15
15
<
10
5
16
16
21156rpanewest2010hhv2.xlsm, data
-1 - 5/10/2011

REASONABLE POTENTIAL ANALYSIS
20
Chloroform
Data
Data BDL=112DL
Results
1
Aug-09
3.2 3.2
Sid Dev.
2
May-09
1.1 1.1
Mean
3
Aug-07
1.3 1.3
C.V.
4
Feb-09
'< 1 0.5
n
5
6
Mult Factor =
7
Max. Value
8
Max. Pred Cw
9
10
11
12
13
14
15
16
1.5250
0.7654
4
6.7400
3.2 ug/L
21.6 ug/L
21
Date
1 Aug-09
2 May-09
3 Aug-07
4 Feb-09
5
6
7
8
9
10
11
12
13
14
15
16
D ichlorobromomethane
Data
BDL=112DL
Results
4.2
4.2
Std Dev.
1.1
1.1
Mean
„p 0.78
. 0.78
C.V.
i 1
0.5
n
Mult Factor =
Max. Value
Max. Prod Cw
1.6450
1.0461
4
11.1700
4.2 ug/L
46.9 ug/L
21156rpanevrest2010hhv2.xlsnn, data
-2- 5/10/2011

REASONABLE POTENTIAL ANALYSIS
22
Antimony
Date Data
BDL=112DL
Results
1
Aug-09
39 39
Std Dev.
3.6056
2
May-09
32 32
Mean
36.0000
3
Mar-09
37 37
C.V.
0.1002
4
n
3
5
6
Mult Factor =
1.3700
7
Max. Value
39.0 ug/L
B
Max. Fred Cw
53.4 ug/L
9
10
11
12
13
14
15
16
21156rpanewest2010hhv2.xlsm, data
-3- 5/10/2011

NPDES/A uifer Protection Permitting Unit Pretreatment Information Request Form
t th' f
ER
check applicable PERCS staff:
X CTB, CHO, LUM, NEW, ROA - Dana Fo
HIW, LTN, NEU, YAD - Monti Hassan 3
BRD• CPF, FRB, TAR - Sarah Morrison
PERCS PRETREATMENT STAFF COMPLETE PART:
Status of Pretreatment Program (check at apply) uj --
1) facility' a-epp;oued44etrea
ed
3) facility ha SIUsrndWQ approved Pretreatment Program (list "DEV"if program still underdevelopment)
3a) Full P LTMP
Flow, MGD Permitted Actual Time edod for Actual
Industrial
il,
Uncontrollable n/a O A 14 1 Ihfs - a
POC In
Parameter of
e
POC duet
NPIES, x11-0.
.:
:.
Required
by 503RON.
•
.o
ii�r>fl-
p
��!►��`s_7IC���il
13II
�r
� • �
����I��ralm
i
IA = Monthly
all data on DMRs?
YES
NO (attach data)
data in spreadsl
YES (email to writer)
NO
"Always_in the.LTMP/STMP.:: " Only in LTMP/STMP if sludge land app or composte (dif POCs for incinerators)
Only in LTMP/STMP while SIU still discharges to POTW "" Only in LTMP/STMP when pollutant is still of concern to POTW
Comments to Permit Writer ex., explanation of anyPOCs• Info you have on IU related Investigations into NPDES roblems :
�- Rr(w kAn, � rN -t 1-P �
-1-10 4- Irv% .' ", — r. -h� a 'M f ✓' aArA-+rA r u n r.ti e" I &14r, -- fi
mtholy2010
Revised: July 24, 2007

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5

SOC PRIORITY PROJECT: No
To: Western NPDES Program Unit
Water Quality Section
Attention: Dina Sprinkle
Date: September 24, 2009
NPDES STAFF REPORT AND RECOMMENDATIONS
County: Gaston
NPDES Permit No.: NCO021156
PART I - GENERAL INFORMATION
Facility and address: Mount Holly W WTP
c/o City of Mount Holly
131 South Main Street
Mount Holly, NC 28210
Date of investigation: September 22, 2009
Report prepared by: Samar Bou-Ghazale, Environmental Engineer II
4. Person contacted and telephone number: Mr. Mike Moretz, ORC, [phone]
Directions to site: From the jet. of Hwy. 273 and Tuckaseegee Road in the City of Mount
Holly, travel southeast on Tuckaseegee Road � 0.55 mile to the jet. With Broome Street.
Turn left (east) on Broome Street, and the W WTP is located at the end of this road.
6. Discharge point(s), List for all discharge points: -
Latitude: 350 15' 55"
Longitude: 81' 00' 35"
Attach a USGS Map Extract and indicate treatment plant site and discharge point on map.
USGS Quad No.: F 14 SE
Site size and expansion area consistent with application: Yes. There is area available for
expansion, if necessary.
8. Topography (relationship to flood plain included): The WWTP site lies adjacent to the
Catawba River, however, the existing W WT units appear to be above the river's flood
plain elevation.

Page Two
9. Location of nearest dwelling: Approx. 1000+ feet from the WWTP site.
10. Receiving stream or affected surface waters:
a. Classification: WS-IV, CA
b. River Basin and Subbasin No.: Catawba, 030833
C. Describe receiving stream features and pertinent downstream uses: The discharge
enters the main segment of the Catawba River (approximately 500 feet wide),
which has excellent flow. The River is used for primary recreation and as a water
supply for the Town of Belmont.
PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. a. Volume of wastewater: 4.0 MGD (Design Capacity)
b. What is the current permitted capacity: 4.0 MGD
C. Actual treatment capacity of current facility (current design capacity): 4.0 MGD
d. Date(s) and construction activities allowed by previous ATCs issued in the
previous two years: N/A
e. Description of existing or substantially constructed WWT facilities: The existing
WWT facilities consist of a manually cleaned influent bar screen followed by dual
grit chambers, instrumented flow measurement, a flow equalization basin, three
aeration basins with mechanical aeration, dual secondary clarifiers, dual chlorine
contact chambers with gas disinfection, de -chlorination, dual aerated sludge
holding tanks, and one sludge drying bed (not in use).
f. Description of proposed WWT facilities: There are no proposed WWT facilities at
this time.
g. Possible toxic impacts to surface waters: This facility has a consistent record of
passing toxicity tests. Chlorine is added to the waste stream, however,
de -chlorination is provided.
h. Pretreatment Program (POTWs only): Approved.
2. Residual handling and utilization/disposal scheme:
a. If residuals are being land applied specify DWQ Permit No. WQ0001863.
Residuals Contractor: Synagro
Telephone No: [phone]
b. Residuals stabilization: This facility produces a Class B residual.
C. Screening is hauled by Waste Management (800-927-8362).

Page Three
3. Treatment plant classification: Class III (no change from previous rating).
4. SIC Code(s): 4952 Wastewater Code(s): 01 MTU Code(s): 02003
PART III - OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction Grant Funds or are any public monies
involved (municipals only)? Public monies were used in the construction of this facility.
Special monitoring or limitations (including toxicity) requests: None at this time.
Important SOC/JOC or Compliance Schedule dates: This facility is neither under and SOC
nor is one being proposed.
4. Alternative analysis evaluation: There is no known alternative to a discharge.
PART IV - EVALUATION AND RECOMMENDATIONS
The City of Mount Holly requests renewal of the subject NPDES permit.
The Mount Holly W WTP appeared to be well operated and maintained. No problems
were noted during the site investigation
Pending review and approval by the Western NPDES Program Unit, it is recommended
that the permit be renewed as requested.
Signature o Repq reg er Date
---11 Z/ 4e - 9�Y0
Water Quality Regional Supervisor t Date

CITY of MOUNT HOLLY
LIMMES DEPARTMENT
400 East Central Avenue • Post Office Box 406 • Mount Holly, NC 28120 • 7044122-2939 • 704-822-2933 Fax 0 w .mtholly.us
August 28, 2009
RECEIVED
AUG
NCDENR/ DWQ
Attn: NPDES Unit DENR - WATE
TY
1617 Mail Service Center R OVALI Raleigh, NC 27699-1617 POINT SOURCE 131�AN H
The City of Mount Holly would like to request a NPDES Permit renewal for the
Wastewater Treatment Plant. Please find enclosed an original signed renewal application
and two copies.
If any finther information is required please feel free to contact me at any time.
Sin ly, _
ames Friday
Utility Director
City of Mount Holly
Cell 704.533.2296

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Mount Holly WWTP, NCO021156
Permit Renewal
Catawba
SUPPLEMENTAL APPLICATION INFORMATION
PART FANDUSTRIAL USER DISCHARGES AND RCRA/CERCLA WASTES
All treatment works receiving discharges from significant industrial users or which receive RCRA,CERCLA, or other remedial wastes must
complete part F.
GENERAL INFORMATION:
F.1. Pretreatment program. Does the treatment works have, or is subject ol, an approved pretreatment program?
® Yes ❑ No
F.2. Number of Significant Industrial Users (SIUs) and Categorical Industrial Users (CIUs). Provide the number of each of the following types of
industrial users that discharge to the treatment works.
a. Number of non -categorical SlUs. 2
b. Number of CIUs. 2
SIGNIFICANT INDUSTRIAL USER INFORMATION:
Supply the following information for each SIU. If more than one SIU discharges to the treatment works, copy questions F.3 through F.S and
provide the information requested for each SIU.
F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages
as necessary.
Name: American & Efrd Inc
Mailing Address: PO Box 507
Mount Holly NC 28120
FA. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Textile
F.S. Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's
discharge.
Principal product(s): Textile
Raw material(s): yarn and dyes
F.S. Flow Rate.
a. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in gallons per
day (gpd) and whetherthe discharge is continuous or intermittent.
0.800 gpd (X confinuous or intermittent)
b. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the collection system
in gallons per day (gpd) and whether the discharge is continuous or intermittent.
gpd ( continuous or intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits ® Yes ❑ No
b. Categorical pretreatment standards ® Yes ❑ No
If subject to categorical pretreatment standards, which category and subcategory?
410 textile
NPDES FORM 2A Additional Information

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Mount Holly WWTP, NCO021156
Permit Renewal
Catawba
F.B. Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g.,
upsets, interference) at the treatment works in the past three years?
❑ Yes ® No If yes, describe each episode.
RCRA HAZARDOUS WASTE RECEIVED BY TRUCK, RAIL, OR DEDICATED PIPELINE:
F.9. RCRA Waste. Does the treatment works receive or has it in the past three years received RCRA hazardous waste by truck, rail or dedicated pipe?
❑ Yes ® No (go to F.12)
F.10. Waste transport Method by which RCRA waste is received (check all that apply):
❑ Truck ❑ Rail ❑ Dedicated Pipe
F.11. Waste Description, Give EPA hazardous waste number and amount (volume or mass, specify units).
EPA Hazardous Waste Number Amount Units
CERCLA (SUPERFUND) WASTEWATER, RCRA REMEDIATIONICORRECTIVE ACTION
WASTEWATER, AND OTHER REMEDIAL ACTIVITY WASTEWATER:
FA 2. Remediatlon Waste. Does the treatment works currently (or has it been notified that it will) receive waste from remedial activities?
❑ Yes (complete F.13 through F.15.) ® No
F.13. Waste Origin. Describe the site and type of facility at which the CERCLAIRCRAtor other remedial waste originates (or is excepted to odgniate in
the next five years).
F.14. Pollutants. List the hazardous constituents that are received (or are expected to be received). Include data on volume and concentration, If
known. (Attach additional sheets d necessary.)
F.15. Waste Treatment
a. Is this waste treated (or will be treated) prior to entering the treatment works?
❑ Yes ❑ No
If yes, describe the treatment (provide information about the removal efficiency):
b. Is the discharge (or will the discharge be) continuous or intermittent?
❑ Continuous ❑ Intermittent If intermittent, describe discharge schedule.
END OF PART F.
REFER TO THI' APPLICATION OVERVIEW (PAGE 1) TO DETERMINE WHICH OTHER PARTS
OF FORM 2A YOU MUST COMPLETE
NPDES FORM 2A Additional Information

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
W Mount Holly WTP, NCO021156
Permit Renewal
Catawba
SUPPLEMENTAL APPLICATION INFORMATION
PART F.INDUSTRIAL USER DISCHARGES AND RCRA/CERCLA WASTES
All treatment works receiving discharges from significant Industrial uses or which receive RCRA,CERCLA, or other remedial wastes must
complete part F.
GENERAL INFORMATION:
F.I. Pretreatment program. Does the treatment works have, or is subject ot, an approved pretreatment program?
® Yes ❑ No
F.2. Number of Significant Industrial Users (SIUs) and Categorical Industrial Users (CIUs). Provide the number of each of the following types of
industrial users that discharge to the treatment works.
C. Number of non -categorical SIUs. 2
d. Number of ClUs. 2
SIGNIFICANT INDUSTRIAL USER INFORMATION:
Supply the following information for each SIU. If more than one SIU discharges to the treatment works, copy questions F.3 through F.8 and
provide the Information requested for each SIU.
F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages
as necessary.
Name: Buckeye BttHolly LLC
Mailing Address: 100 Buckeye Drive
Mt Holly NC 28120
FA. Industrial Processes. Describe all the industrial processes that affect or contribute to the SlU's discharge.
Non woven
F.S. Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's
discharge.
Principal product(s): Non Woven Fiber
Raw matedal(s): wood pulp cotton lints pulp bio component synthetic fiber
F.6. Flow Rate.
C. Process wastewater Flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in gallons per
day (gpd) and whether the discharge is continuous or intermittent.
0.120 gpd (X continuous or intermittent)
d. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the collection system
In gallons per day (gpd) and whether the discharge is continuous or Intermittent.
gpd ( continuous or intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits ® Yes ❑ No
b. Categorical pretreatment standards ® Yes ❑ No
If subject to categorical pretreatment standards, which category and subcategory?
Non wovens 410 textile
NPDES FORM 2A Additional Information

FACILITY NAME AND PERMIT NUMBER: —T�
FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Mount Holly WWTP, NCO021156
Permit Renewal
Catawba
F.B. Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g.,
upsets, interference) at the treatment works in the past three years?
❑ Yes ® No If yes, describe each episode.
RCRA HAZARDOUS WASTE RECEIVED BY TRUCK, RAIL, OR DEDICATED PIPELINE:
F.9. RCRA Waste. Does the treatment works receive or has it in the past three years received RCRA hazardous waste by truck, rail or dedicated pipe?
❑ Yes ID No (go to F.12)
F.10. Waste transport Method by which RCRA waste is received (check all that apply):
❑ Truck ❑ Rail ❑ Dedicated Pipe
F.11. Waste Description. Give EPA hazardous waste number and amount (volume or mass, specify units).
EPA Hazardous Waste Number Amount Units
CERCLA (SUPERFUND) WASTEWATER, RCRA REMEDIATION/CORRECTIVE ACTION
WASTEWATER, AND OTHER REMEDIAL ACTIVITY WASTEWATER:
F.12. Remediation Waste. Does the treatment works currently (or has it been notified that it will) receive waste from remedial activities?
❑ Yes (complete F.13 through FA5.) ® No
F.13. Waste Origin. Describe the site and type of facility at which the CERCLAIRCRAIor other remedial waste originates (or is excepted to origniate in
the next five years).
F.14. Pollutants. List the hazardous constituents that are received (or are expected to be received). Include data on volume and concentration, if
known. (Attach additional sheets If necessary.)
F.15. Waste Treatment
C. Is this waste treated (or will be treated) prior to entering the treatment works?
❑ Yes ❑ No
If yes, describe the treatment (provide infonnation about the removal efficiency):
d. Is the discharge (or will the discharge be) continuous or intermittent?
❑ Continuous ❑ Intermittent If intermittent, describe discharge schedule.
END OF PART F.
REFER TO TIME APPLICATION OVERVIEW (PAGE 1) TO DETERMINE WHICH OTHER PARTS
OF FORM 2A YOU MUST COMPLETE
NPDES FORM 2A Additional Information

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Mount Holly VWVfP, NCO021156
Permit Renewal
Catawba
SUPPLEMENTAL APPLICATION INFORMATION
PART F.INDUSTRIAL USER DISCHARGES AND RCRA/CERCLA WASTES
All treatment works receiving discharges from significant industrial users or which receive RCRA,CERCLA, or other remedial wastes must
complete part F.
GENERAL INFORMATION:
F.I. Pretreatment program. Does the treatment works have, or is subject to, an approved pretreatment program?
® Yes ❑ No
F.2. Number of Significant Industrial Users (SIUs) and Categorical Industrial Users (Clue). Provide the number of each of the following types of
industrial users that discharge to the treatment works.
e. Number of non -categorical SIUs. 2
f. Number of CIUs. 2
SIGNIFICANT INDUSTRIAL USER INFORMATION:
Supply the following Information for each SIU. If more than one SIU discharges to the treatment works, copy questions F.3 through F.8 and
provide the Information requested for each SIU.
F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages
as necessary.
Name: Clanant Corporation
Mailing Address: 625 East Catawba Avenue
PO Box 669246 Mount Holly NC 28120
FA. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Domestic & Industrial waste as well as affected groundwater, Process and non process wastewater covered by 40CFR414 and 40CFR455 air
scrubbers cooling water, boiler blow down etc
F.S. Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's
discharge.
Principal product(s): specialty chemicals
Raw material(s): alcohol oils soaps acids
F.B. Flow Rate.
e. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in gallons per
day (gpd) and whether the discharge is continuous or intermittent.
0.110 gpd ( continuous or intermittent)
f. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the collection system
in gallons per day (gpd) and whether the discharge is continuous or Intermittent.
gpd ( continuous or intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits ® Yes ❑ No
b. Categorical pretreatment standards ® Yes ❑ No
If subject to categorical pretreatment standards, which category and subcategory?
40 CFR 414 & 455
NPDES FORM 2A Additional Information

_FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Mount Holly, NCO021156
Permit Renewal
Catawba
F.B. Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g.,
upsets, interference) at the treatment works in the past three years?
❑ Yes ® No If yes, describe each episode.
RCRA HAZARDOUS WASTE RECEIVED BY TRUCK, RAIL, OR DEDICATED PIPELINE:
F.9. RCRA Waste. Does the treatment works receive or has it in the past three years received RCRA hazardous waste by truck, rail or dedicated pipe?
❑ Yes El No (go to F.12)
F.10. Waste transport Method by which RCRA waste is received (check all that apply):
❑ Truck ❑ Rail ❑ Dedicated Pipe
F.11. Waste Description. Give EPA hazardous waste number and amount (volume or mass, specify units).
EPA Hazardous Waste Number Amount Units
CERCLA (SUPERFUND) WASTEWATER, RCRA REMEDIATIONICORRECTIVE ACTION
WASTEWATER, AND OTHER REMEDIAL ACTIVITY WASTEWATER:
FA 2. Remedlation Waste. Does the treatment works currently (or has it been notified that it will) receive waste from remedial activities?
❑ Yes (complete F.13 through F.15.) ® No
F.13. Waste Origin. Describe the site and type of facility at which the CERCLA/RCRA/or other remedial waste originates (or is excepted to origniate in
the next five years).
F.14. Pollutants. List the hazardous constituents that are received (or are expected to be received). Include data on volume and concentration, if
known. (Attach additional sheets if necessary.)
F.15. Waste Treatment
e. Is this waste treated (or will be treated) prior to entering the treatment works?
❑ Yes ❑ No
If yes, describe the treatment (provide information about the removal efficiency):
I. Is the discharge (or will the discharge be) continuous or intermittent?
❑ Continuous ❑ Intermittent If intermittent, describe discharge schedule.
END OF PART F.
REFER TO THE:: APPLICATION OVERVIEW (PAGE 1) TO DETERMINE WHICH OTHER PARTS
OF FORM 2A YOU MUST COMPLETE
NPDES FORM 2A Additional Information

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Mount Holly WVVfP, NCO021156
Permit Renewal
Catawba
SUPPLEMENTAL APPLICATION INFORMATION
PART F.INDUSTRIAL USER DISCHARGES AND RCRA/CERCLA WASTES
All treatment works receiving discharges from significant Industrial users or which receive RCRA,CERCLA, or other remedial wastes must
complete part F.
GENERAL INFORMATION:
F.I. Pretreatment program. Does the treatment works have, or is subject ol, an approved pretreatment program?
0 Yes ❑ No
F.2. Number of Significant Industrial Users (SIUs) and Categorical Industrial Users (CIUs). Provide the number of each of the following types of
industrial users that discharge to the treatment works.
g. Number of non -categorical SIUs. 2
h. Number of ClUs. 2
SIGNIFICANT INDUSTRIAL USER INFORMATION:
Supply the following information for each SIU. If more than one SIU discharges to the treatment works, copy questions F.3 through F.8 and
provide the Information requested for each SIU.
FA Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages
as necessary.
Name: Freightliner Trucks
Mailing Address: 1800 North Main Street
Mount Holly, NC 28120
FA. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Truck Manufacturing
F.S. Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's
discharge.
Principal product(s): Trucks
Raw material(s): Aluminum steel acids bases organic solvents and organic paints
F.6. Flow Rate.
g. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in gallons per
day (gpd) and whether the discharge is continuous or intermittent.
0.030 gpd (X continuous or intermittent)
h. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the collection system
in gallons per day (gpd) and whether the discharge is continuous or intermittent.
gpd ( continuous or intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits 0 Yes 0 No
b. Categorical pretreatment standards 0 Yes ❑ No
If subject to categorical pretreatment standards, which category and subcategory?
40 CFR 413
NPDES FORM 2A Additional Information

r
FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Mount Holly WWTP, NCO021156
Permit Renewal
Catawba
F.8. Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g.,
upsets, interference) at the treatment works in the past three years?
❑ Yes ® No If yes, describe each episode.
RCRA HAZARDOUS WASTE RECEIVED BY TRUCK, RAIL, OR DEDICATED PIPELINE:
F.9. RCRA Waste. Does the treatment works receive or has it in the past three years received RCRA hazardous waste by truck, rail or dedicated pipe?
❑ Yes ® No (go to F.12)
F.10. Waste transport Method by which RCRA waste Is received (check all that apply):
❑ Truck ❑ Rail ❑ Dedicated Pipe
F.11. Waste Description. Give EPA hazardous waste number and amount (volume or mass, specify units).
EPA Hazardous Waste Number Amount Units
CERCLA (SUPERFUND) WASTEWATER, RCRA REMEDIATION/CORRECTIVE ACTION
WASTEWATER, AND OTHER REMEDIAL ACTIVITY WASTEWATER:
F.12. Remediation Waste. Does the treatment works currently (or has it been notified that it will) receive waste from remedial activities?
❑ Yes (complete F.13 through FA5.) ID No
F.13. Waste Origin. Describe the site and type of facility at which the CERCLA/RCRAIor other remedial waste originates (or is excepted to origniate in
the next five years).
F.14. Pollutants. List the hazardous constituents that are received (or are expected to be received). Include data on volume and concentration, if
known. (Attach additional sheets If necessary.)
F.15. Waste Treatment
g. Is this waste treated (or will be treated) prior to entering the treatment works?
❑ Yes ❑ No
If yes, describe the treatment (provide information about the removal efficiency):
h. Is the discharge (or will the discharge be) continuous or intermittent?
❑ Continuous ❑ Intermittent If intermittent, describe discharge schedule.
END OF PART F.
REFER TO THE: APPLICATION OVERVIEW (PAGE 1) TO DETERMINE WHICH OTHER PARTS
OF FORM 2A YOU MUST COMPLETE
NPDES FORM 2A Additional Information

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MT. HOLLY SLUDGE
SLUDGE MANAGEMENT PLAN
Sludge is wasted to two 750,000 gallon holding tanks that serve as storage
and aeration of biosolids.These tanks are frequently decanted to remove
excess water and to thicken sludge, generally to about 3% concentration.
Synagro is the contracted sludge hauler that delivers the sludge to the
farmers where it is land applied. The sludge is processed in the same tanks
for vector reduction and pathogen destruction.The sludge will be analyzed
for complete digestion and lime stabilized when needed before hauling.
The city holds land application permit # WQ 0001863 which includes the
approved land application sites.