NC0020184_Permit (Modification)_20020712

NPDES DOCUWENT SCANNING COVER SHEET
NPDES Permit: NC0020184
Gastonia — Long Creek WWTP
Document Type: Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Correspondence
201 Facilities Plan
Instream Assessment (67B)
Environmental Assessment (EA)
Permit
History
Document Date: July 12, 2002
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-State of North Carolina
Department of Environment •
and Natural Resources
Division of Water Quality
Michael F. Easley, Govemor NCDENR
William G. Ross, Jr., Secretary NORTH CAROLINA DEPARTMENT OF
Kerr T. Stevens, Director ENVIRONMENT AND NATURAL RESOURCES
July 12,2002
Mr. David Shellenbarger
City of Gastonia
P.O. Box 1748
Gastonia,North Carolina
Subject: NPDES Permit Modification
Permit NCO020184
Long Creek VWT?
Gaston County
Dear Mr. Shellenbarger:
On July 1,2002,a final permit for the subject facility will become effective. On June 28,2002,you brought
to our attention a typographical error in the subject permit. This error relates to the instream sampling locations,
which were erroneously listed as the locations for the Crowders Creek W-%.=. The instream sampling locations have
been changed to reflect those in your previous perniit;this change is considered a typographical error and therefore
constitutes a minor modification in accordance with 40 CFR 122.63 (a).
Please find enclosed the revised permit pages. The revised pages should be inserted into your permit. The
old pages may then be discarded. All other terms and conditions contained in the original permit remain unchanged
and in full effect. This permit modification is issued under the requirements of North Carolina General Statutes 143-
215.1 and the Memorandum of Agreement between North Carolina and the U. S. Environmental Protection Agency.
If any parts, measurement frequencies or sampling requirements contained in this permit modification are
unacceptable to you,you have the right to an adjudicatory hearing upon written request within thirty (30) days
following receipt of this letter. This request must be a written petition conforming to Chapter 150B of the North
Carolina General Statutes, filed with the Office of Administrative Hearings (6714 Mail Service Center,Raleigh,North
Carolina 27699-6714). Unless such demand is made, this decision shall be final and binding.
If you have any questions concerning this permit modification,please contact Natalie Sierra at (919) 733-
5083, extension 551.
Sincerely,
q4 J4��
Aan . Klimek,P.E.
cc: Nlooresv&Regional Office,Water Quality Section
NPDES Unit
Central Files
EPA Region 4
1617 Mail Service Center,Raleigh,North Carolina 27699-1617 Telephone[phone] FAX[phone]
An Equal Opportunity Affirmative Action Employer VISIT US ON THE INTERNET 0 httpJ/h2o.enr.state.nc.us/NPDES

Permit No. NCO020184
4
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
In compliance with the provision of North Carolina General Statute 143-215.1, other lawful standards and regulatior
promulgated and adopted by the North Carolina Environmental Management Commission, and the Federal Water
Pollution Control Act, as amended,
City of Gastonia
is hereby authorized to discharge wastewater from a facility located at
Long Creek Wastewater Treatment Plant
Old Spencer Mountain Road
Gastonia
Gaston County
to receiving waters designated as Long Creek in the Catawba River Basin
in accordance with effluent limitations, monitoring requirements, and other conditions set forth in Parts 1.
1I, III, and IV hereof.
The permit shall become effective August 1, 2002.
This permit and the authorization to discharge shall expire at midnight on January 31, 2005.
Signed this day July 12, 2002.
Alan W. Klimek, P.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission

Permit No. NCO020184
A (1). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
During the period beginning on the effective date of the permit and lasting until expiration, the permittee is authorized to
discharge from outfall(s) serial number 001. Such discharges shall be limited and monitored by the Permittee as specified
below:
EFFLUENT LIMITS 4 MONITORING REQUIREMENTS
CHARACTERISTICS
Mo
nthly , Weekly Daily Measureme '` Sample Sample
Average Average Mazitmum nt Type Locationl
Flow 16.0 MGD Continuous Recording I or E
BOD, 5-day, 20°C2 5.0 mg/1 7.5 mg/1 Daily Composite E,l
(April 1-October 31)
BOD, 5-day, 20°C2 10.0 mg/l 15.0 mg/1 Daily Composite E,I
(November 1 -March 31
TSS2 30.0 mg/l 45.0 mg/1 Daily Composite E,1
NH3-N, (April 1 - October 31) 3 2.0 mg/1 Daily Composite E
NH3-N. (November I - March 31)3 4.0 mg/1 Daily Composite E
Dissolved Oxyg=4 Daily Grab E.U,D
Fecal Coliform (geometric mean) 200/100 ml 400/100 ml Daily Grab E
Temperature Daily Grab E,U,D
Total Residual Chlorines 28.0 ug/l Daily Grab E
Conductivity 3/week Grab U,D
Total Nitrogen (NO2+ NO3 +TKN) 6. 0 mg/l Weekly Composite E
(April 1- Oct 31)
Total Nitrogen (NO2+ NO3 +TKN) Weekly Composite E
(Nov l - March 31)
Total Phosphorus 1.0 m /I Weekly Composite E
Color6 Monthly Grab U,D
Color6 Monthly Composite E
Chronic Twdclty7 Quarterly Composite E
anide8 22 ug/1 Weekly Grab E
Mencuprg 0.065 ug/1 Weekly Grab E
Copper 2/month Com osite E
Silver 2/month Com osite E
Antimony Quarterly Composite E
Chloroform Quarterly Grab E
Hto Dai!Y Grab E
of•a:
I. Sample locations:E-Effluent,1-Influent,U-Highway 275 or 200 feet above outfall,D-Downstream at a)Spencer Mountain Pool at dam b)
South Fork River bypass at NCSR 2003 c)1.5 miles below tailrace at power lines. Instream monitoring shall be grab samples taken 3/wk
(Jun-Sep)and 1/wk(Oct-May).
2. The monthly average effluent GODS and Total Suspended Solids concentrations shall not exceed 15%of the respective influent value(85%removal).
3- The Division may re-open this permit to require weekly average limits for ammonia. After calculating allowable concentrations,the Division will perform
an analysis of past ammonia data to determine if there is a reasonable potential for this discharge to exceed these potential limits. If there is,this permit
will be re-opened. If there is not,the permit will not be re-opened,but will contain weekly average limits for ammonia upon renewal.
4. The daily average dissolved oxygen effluent concentration shall not be less than 6.0 mg/1.
5. Compliance with the limit for Total Residual Chlorine shall be based upon a daily average value.
6. As a Tier 1 Facility,Long Creek VX WIT must monitor for color at upstream and downstream monitoring stations on a monthly basis,from April to
October. In addition,monthly color samples of the effluent must be taken year-round. See Part A.(3.)for more information and other
effluent color requirements.
7. Chronic Toxicity(Ceri�danhnia),P/F,19%;March,June,September,and December;See Supplement to Effluent Limitations and ivfonitoring
Requirements Page-Special Conditions for flow of 6.0 MGD.
S. The detection limit for cyanide is 10.0 ug/l. If the measured levels of cyanide are below the detection limit,then the measurement is considered to be
zero for purposes of compliance evaluation and should be reported on the DMR as< 10.0 ug/l.
9. The current detection limit for mercury is 0.2 ug/l. If the measured levels of mercury are below the detection limit,then the measurement is considered
to be zero for purposes of compliance evaluation and should be reported on the DMR as<0.2 ug/l. If mercury is detected in any sample,the presence of
mercury can be verified using a separate split sample analyzed in accordance with EPA Method 1631. The result from this second analysis shall be used
for compliance determinations. As of September 1,2003,all mercury samples shall be analyzed using EPA Method 1631.
10. The pl-I shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be monitored daily at the effluent by grab sample.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

Long Creek WWTP NPDES Permit NCO020184
Subject: Long Creek WWTP NPDES Permit NCO020184
Date: Fri, 28 Jun 2002 16:43:30 -0400
From: "Hux, David" <[e-mail]>
To: <[e-mail]>
CC: "Cummings, Larry" <[e-mail]>,
"Shellenbarger, David" <[e-mail]>
Natalie,
As discussed this afternoon, we have found that the identifications for stream
monitoring locations are not correct on the Long Creek WWTP Permit (NC0020184) . In
the permit the Crowders Creek Monitoring Locations are listed instead of the South
Fork River locations.
The most recent locations identified on previous permits for Long Creek included the
following:
I. Upstream - Highway 275 or 200 feet above outfall .
2. Downstream - Spencer Mountain Dam Pool at dam
3 . South Fork bypass at SR 2003
4. South Fork 1.5 miles below tailrace at power lines
Considering the fact that we are required by the permit to start monitoring the river
next week, the City will monitor the locations listed above until further notice by
your office. You have indicated that you will discuss this issue with your
supervisor on Monday and get back with us at that time. If you have any questions or
comments please contact Larry Cummings at (704) 866-6991 or David Shellenbarger at
(704) 854-6667.
Thank you for your assistance with this matter.
Sincerely,
David Hux
Assistant Division Manager - WWT
City of Gastonia
Wastewater Treatment Division
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! of 1 7/4/02 9:48 AM

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J U L 1 2002
Cite of (bagu Ci
UENR - WATER QUALITY
P.O.BOX 1748 POINT SOURCE BRANCH
Oaaania, Portb Carolina 28053-1 746
WASTEWATER TREATMENT DIVISION
June 26, 2002
Mr. D. Rex Gleason
NC DENR — Mooresville Office
919 N. Main Street
Mooresville, N.C. 28115
Subject: Long Creek Wastewater Treatment Plant—Anaerobic Digestion
Dear Mr. Gleason:
In August of 1999, the City,of Gastonia began the use of Lime Stabilization at the Long
Creek WWTP (NPDES # 0020184) in efforts to meet the 40 CFR Part 503 and the Land
Application Permit (#WQ0001793) requirements for the Land Application of Wastewater
Residuals. At the time of our request to move to lime stabilization, the Long Creek
WWTP was experiencing high solids in the influent, Dissolved Air Floatation
(Thickening) problems, and Digester problems that were.threatening compliance with
the regulations. All along the City believed that hopefully lime stabilization was a
temporary solution to the problems that we were experiencing. Since the time we began
the lime stabilization we have focused on returning to anaerobic digestion. Since 1999
the City has seen decreased solids loadings, has improved/efficient DAF operation and
is currently cleaning and working on the digesters in efforts to return to Anaerobic
Digestion sometime in July.
The City has and will keep Ms. Ellen Huffman of the Mooresville Office informed of our
progress with the project. If you or any of your staff have any specific questions
concerning this process, please contact me at 704-866-6726. Thank you again for your
cooperation.
Sincerely,
David Hux
Assistant Division Manager—Wastewater Treatment
CC: Matt Jordan, Director of Public Works/Utilities
)-arty Cummings, Division Manager—Wastewater Treatment
Natalie Sierra, NCDENR — Permits & Engineering /'
Ellen Huffman, NCDENR— DWQ Mooresville
p A ISO 14001 Certified
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