NC0081370_Technical Correction_20051220

NPDES DOCUMENT !;CANNING COVER SHEET
NC0081370
Claremont / McLin Creek WWTP
NPDES Permit:
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Correspondence
Owner Name Change
Technical Correction
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
December 20, 2005
This document is printed an reuse paper - ignore a.ny
content on the reirerse side

100 e/+NId
December 20, 2005
Ms. Doris Bumgarner, City Manager
City of Claremont
P.O. Box 446
Claremont, North Carolina 28610
Michael F. Easley, Govemor
State of North Carolina
William G. Ross, Jr., Secretary
Department of Environment and Natural Resources
Alan W. Klimek P.E., Director
Division of Water Quality
Subject: Correction of Permit Effective Date
NPDES Permit No. NC0081370
Claremont — McLin Creek WWTP
B&B Road (SR 1728)
Catawba County
Dear Ms. Bumgarner:
The Division of Water Quality has noted an error in the effective date of the subject permit. Your
recently issued NPDES permit is hereby corrected to reflect an effective date of January 1, 2006 (not
February 1, 2005).
We also understand from your recent correspondence that your hard copy of the permit is otherwise
inconsistent with our records. Therefore, we have attached another copy of the permit issued on
December 8. Please substitute the attached and discard the previous copy. The attached document is
consistent with decisions and conditions described in our cover letter to you dated December 8, 2005.
This permit is not transferable except after notifying the Division of Water Quality. The Division may
require modification, or revocation and re -issuance of this permit. Please notice that this permit does
not affect your legal obligation to obtain other permits required by the Division of Water Quality, the
Division of Land Resources, the Coastal Area Management Act, or other federal or local
governments.
If you have questions, or if we can be of further service, please contact Joe Corporon at
[[e-mail]] or call [phone], extension 597.
Respectfully,
h,,r ; Alan W. Klimek, P.E.
Enclosure: corrected Final NPDES Permit NC0081370
cc: Mooresville Regional Office, Water Quality Section
STPDES Unit ir
Aquatic Toxicology Unit
ern
NCDENR
North Carolina Division of Water Quality 1617 Mail Service Center Raleigh, NC 27699-1617 [phone] Customer Service
1 800 623-7748

Permit NC0081370
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 provisions of North Carolina General Statute 143-215.1, other lawful
standards and regulations promulgated and adopted by the North Carolina Environmental
Management Commission, and the Federal Water Pollution Control Act, as amended,
City of Claremont
is hereby authorized to discharge wastewater from an outfall located at the
Claremont - McLin Creek VWVTP
B & B Road, NCSR 1728
Catawba County
to receiving waters designated as McLin Creek 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 January 1, 2006.
This permit and authorization to discharge shall expire at midnight on March 31, 2010.
Signed this day December 8, 2005.
yitA,
Alan W. Klimek, PE, Director
Division of Water Quality
By Authority of the Environmental Management Commission

Permit NC0081370
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether for operation or discharge are
hereby revoked, and as of this 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 described
herein.
City of Claremont
Is hereby authorized to:
1. to continue discharging 0.300 MGD of treated, domestic wastewater from a sequencing
batch reactor type treatment facility consisting of
• Catenary bar screen with manual bar screen bypass
• Vortex de-gritter
• Flow metering
• Three (3) influent pump stations
• Dual intermittent -cycle extended aeration basins
• Three (3) tertiary sand filters
• Chlorination -- dechlorination
• Two (2) aerated sludge holding tanks
• Standby power generator
• Cascade post -aeration
located at, Claremont - McLin Creek WWTP, at B & B Road and NCSR 1728 near
Claremont, Catawba County; and
2. to discharge from said wastewater treatment works through Outfall 001 to McLin Creek
(see attached map), a stream classified as C waters within the Catawba River Basin.

City of Claremont
McLin Creek WWTP
Latitude: 35° 41' 44" N State Grid: E 14 NE / E 14 SW
Longitude: 81° 07' 19" W Permitted Flow: 0.300 MGD
Receiving Stream: McLin Creek Drainage Basin: Catawba River Basin
Stream Class: C Sub -Basin: 03-08-32
Facilitympt
Location "'
oo
not to scale
North
NPDES Permit No. NC008 1370
Catawba County

NPDES Permit No. NC0081370
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 through
Outfall 001. Such discharges shall be limited and monitored by the Permittee as specified below:
. a....\.
•PARAMETERSr, _ ♦ ,.in
.- ,,
,...a,�. .�tTy:g•,;. �.• �.r.H..r,.,L Fn. UENLI IM1TS__ i-..4'2 .,_.
ra,< ,MONITORING.REp,QlUeIRE.MfN.
Measuremert��
�:1=re' ue�ic
fSam ��
�T e
. .
x
Sam e ri •Y-,
:
Loc n aiio
. _ .J..
. •
t- r
��
��Monthl
Weekl
.Average.:':=
.
� . Dail _
X' :Maximum :. Y
Flow (MGD)
0.300
Continuous
Recording
I or E
BOD, 5 day, 20°C 2 (April 1 thru October 31)
8.0 mg/L
12.0 mg/L
Weekly
Composite
E, I
BOD, 5 day, 20°C2 (November 1 thru March 31)
16.0 mg/L
24.0 mg/L
Weekly
Composite
E, I
Total Suspended Solids (TSS)2
30 mg/L
45 mg/L
Weekly
Composite
E, I
NH3 as N (April 1 thru October 31)
2.0 mg/L
6 mg/L
Weekly
Composite
E
NH3 as N (November 1 thru March 31)
4.0 mg/L
12 mg/L
Weekly
Composite
E
Dissolved Oxygen3
Weekly
Grab
E
Fecal Coliform (geometric mean)
200 / 100 ml
400 / 100 ml
Weekly
Grab
E
Total Residual Chlorine (TRC)
28 µg/L
Weekly
Grab
E
Temperature (°C)
Weekly
_ Grab
E
pH4
Weekly
Grab
E
Total Nitrogen (NO2 + NO3 + TKN)
Quarterly
Composite
E
Total Phosphorus
_
Quarterly
Composite
E
Chronic Toxicity5
Quarterly
Composite
E
Total Mercury6
Quarterly
Grab
E
Total Copper
Monthly
Composite
E
Total Silver
Monthly
Composite
E
Total Zinc
Monthly
Composite
E
Temperature, °C
Weekly
Grab
U, D
Dissolved Oxygen
Weekly
Grab
U, D
See next page for Table Footnotes

NPDES Permit No. NC0081370
Table Footnotes:
1. Sample Locations: E — Effluent; I — Influent; U — Upstream at NCSR 1722 (south of Claremont); D — Downstream at NCSR
1722 (east of Claremont).
2. Monthly average effluent concentrations for Biochemical Oxygen Demand (BOD5) and TSR shall not exceed 15% of the respective
influent values (i.e. 85% removal).
3. Daily average dissolved oxygen effluent concentration shall not fall below 5.0 mg/L.
4. pH shall not fall below 6.0 nor exceed 9.0 standard units.
5. Chronic Toxicity (Ceriodaphnia) at 9 %; quarterly during January, April, July, October; See Special Condition A. (2.)
6. Mercury — the Permittee shall conduct sampling and analyses according to field and laboratory techniques described in test method
EPA #1631.
Units:
mg/L =
Aga- =
m1=
BOD =
NH3 as N =
milligrams per liter
micrograms per liter
milliliter
biochemical oxygen demand
nitrate as nitrogen
Effluent shall contain no floating solids or foam visible in other than trace amounts.

. NPDES Permit No. NC0081370
SUPPLEMENT OT EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
SPECIAL CONDITIONS
A. (2.) 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 9%.
The permit holder shall perform at a minimum, quarterly 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 January, April, July, and October. Effluent sampling for this testing shall be performed at the NPDES
permitted fmal 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 permit condition will be entered on the Effluent Discharge Monitoring
Form (MR-1) for the months in which tests were performed, using the parameter code TGP3B for the pass/fail results and
THP3B for the Chronic Value. Additionally, DWQ Form AT-3 (original) is to be sent to the following address:
Attention:
Environmental Sciences Branch
North Carolina Division of
Water Quality
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
Completed Aquatic Toxicity Test Forms shall be filed with the Environmental Sciences Branch 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 of flow from the facility during a month in which toxicity monitoring is required, the
permittee will complete the information located at the top of the aquatic toxicity (AT) test form indicating the facility name,
permit number, pipe number, county, and the month/year of the report with the notation of "No Flow" in the comment area of the
form. The report shall be submitted to the Environmental Sciences Branch 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.
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 Permits NC0081370 NC0032662 renewal
Subject: NPDES Permits C0081370 NC0032662 renewal
From: Mike Fox <mikef ci.conover.nc.us>
Date: Fri, 21 Oct 2005 15:06:30 -0400
To: "'[e-mail]"' <[e-mail]>
CC: "'[e-mail]"' <[e-mail]>
Dear Mr. Corporon:
This correspondence is concerning the City of Claremont's Mclin Creek
Facility (NC0081370) and North Facility (NC0032662), NPDES permit renewal
The City of Conover is contracted to operate the City of Claremont's
wastewater facilities and that is why I am corresponding.
After reviewing the original plans with the design engineer, Miles Champion,
we concluded no total nutrient removal demands were designed into the Mclin
Facility (NC0081370). The SBR manufacturer, Austgen Biojet Company, does
design in nutrient removal to facilities where it is required, but the Mclin
Plant has never had those type limitations. The BOD and NH3 as N demands
are so stringent on the facility that tertiary sand filters were designed to
eliminate ashing or pin flock that is created due to long detention times
and a long sludge age. Sand filters benefit the facility by reducing
suspended solids created by the ashing.. The design flow of the facility. is
0.300 MGD which is below the 0.500 MGD leval of a Class III facility.
Considering this information I feel the Mclin Facility is a Class II
facility and should have monitoring frequencies reflecting a Class II
facility.
The City of Claremont's North Facility (NC0032662) has had a monitoring
frequency for fecal coliform of five times per week. The facility has not
been in non-compliance with fecal coliform, so this frequency seems very
excessive. We request the frequency of monitoring fecal coliform be reduced
to weekly as the case with most Class II facilities. If at a time fecal
coliform becomes a pollutant of great concern due to non -compliances with
limits, a more frequent monitoring regime may be justified.
We appreciate your considerations on these points and if you have any
questions, comments, or need any further information you may contact me at
[phone] or [phone].
Sincerely,
Michael Fox
Wastewater Treatment and Collection Supervisor
City of Conover
1\ 1 of l
12/7/2005 8:45 AM