NC0026646_Permit (Issuance)_20100212

NPDES DOCUHENT SCAHNIN`: COVER SHEET
NPDES Permit:
NC0026646
Pilot Mountain WWTP
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Correspondence
Owner Name Change
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
February 12, 2010
Miss document is printed on reuse paper - ignore any
content on the re'rerse side

ern
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins Dee Freeman
Governor Director . Secretary
Mr. Blair Knox, Town Manager
Town of Pilot Mountain
124 West Main Street
Pilot Mountain, North Carolina 27041
February 12, 2010
Subject: NPDES Permit Issuance
Permit No. NC0026646
Pilot Mountain WWTP
Surry County
Dear Mr. Knox:
In accordance with the application for discharge permit received, the Division is forwarding
herewith the subject NPDES 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 Town of Pilot Mountain to discharge wastewater from the Pilot
Mountain Wastewater Treatment Plant to the Ararat River, a class C water in the Yadkin -Pee Dee
River Basin. The permit includes discharge limitations/or monitoring for flow, BODS, ammonia
nitrogen, total suspended solids, dissolved oxygen, total residual chlorine, fecal conform, lead,
copper, zinc, and chronic toxicity.
Please note that the receiving stream, the Ararat River is listed as an impaired waterbody on
the North Carolina 303(d) Impaired Waters List. Addressing impaired waters is a high priority with
the Division, and ambient monitoring 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/1. Effective March 1, 2008, the Division received EPA approval
to allow a 50 ug/1 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/1 will
be treated as zero. A footnote regarding this change has been added to the effluent limitations page
in the permit.
1617 Mail Service Center, Raleig.h, North Carolina 27699-1617
Location: 512 N. Salisbury St. Raleigh, North Carolina 27604
Phone: [phone] FAX: [phone] \ Customer Service:1-877-623-6748
Internet www.ncwaterquality.org
An Equal Opportunity 1 Affirmative Action Employer
JJne Carolina
1�7VaturaIIij

The following modifications in December 16th draft permit remain in the final permit:
• These treatment components have been added on the supplement to permit cover sheet:
manual bar screen and dechlorination.
• Please note that there have been minor language changes and the addition of a new
paragraph regarding data submittal in special conditions A. (3) and (4) Chronic Toxicity
Permit Limits. (The new paragraph is located second from the end of the condition.)
• Monthly monitoring for total cadmium, cyanide, and silver has been deleted from the permit
based on the results of a reasonable potential analysis conducted on submitted monitoring
data. The results indicated that there was no reasonable potential to exceed water quality
standards in the receiving stream.
• The effluent limit for total lead has been removed from the permit based on the results of a
reasonable potential analysis conducted on submitted monitoring data. The results
indicated that there was no reasonable potential to exceed water quality standards instream.
It is recommended that total lead be monitored quarterly in conjunction with the whole
effluent toxicity test.
If any parts, measurement frequencies or sampling requirements contained in this permit are
unacceptable to you, you have the right to an adjudicatory hearing upon written request within
thirty (30) days following receipt of this letter. This request must be in the form of a written
petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed with the
office of Administrative Hearings, 6714 Mail Service Center, Raleigh, North Carolina 27699-6714.
Unless such 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
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 Jacquelyn Nowell at
telephone number [phone].
Sincerely,
Coleen H. Sullins
Attachments
cc: Winston Salem Regional Office/Surface Water Protection Section (ecopy)
EPA Region IV/Attn. Marshall Hyatt (ecopy)
Aquatic Toxicology Unit/Cindy Moore (ecopy)
Technical Assistance and Certification Unit (ecopy)
ESS/Carrie Ruhlman (ecopy)
NPDES File/NC0026646

Permit NC0026646
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 regulations
promulgated and adopted by the North Carolina Environmental Management Commission, and the Federal Water Pollution
Control Act, as amended, the
Town ,of Pilot Mountain
is hereby authorized to discharge wastewater from a facility located at the
Pilot Mountain Wastewater Treatment Plant (WWTP)
Lynchburg Road
near Pilot Mountain
Surry County
to receiving waters designated as the Ararat River in the Yadkin -Pee Dee River Basin in accordance with
effluent limitations, monitoring requirements, and other conditions set forth in Parts I, II, III, and IV
hereof.
'This perrnit shall become effective March 1, 2010.
This permit and authorization to discharge shall expire at midnight on February 28, 2014.
Signed this February 12, 2010.
1
Coleen H. Sullins, Director
Division of Water Quality
By Authority of the Environmental Management Commission

Permit NC0026646
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.
The Town of Pilot Mountain is hereby authorized to:
1. Continue to operate an existing 1.5 MGD (at a reduced flow of 0.5 MGD) extended aeration facility
that includes the following components:
➢ Influent pump station
➢ Manual bar screen
➢ Oxidation ditch
➢ Two clarifiers
➢ Chlorine disinfection
➢ Dechlorination
➢ Step re -aeration
➢ Aerated sludge holding unit
This facility is located at the Pilot Mountain WWTP, on Lynchburg Road near Pilot Mountain in Surry
County.
2. Upon receiving written authorization from the Division of Water Quality, increase flow and operate
facility at 1.5 MGD design flow.
3. Discharge from said treatment works at the location specified on the attached map into the Ararat
River, which is classified as C waters in the Yadkin -Pee Dee River Basin.

Town of Pilot Mountain WWTP
USGS Quad: B16SE
Latitude: 36° 22' 46" N
Longitude: 80° 28' 54" W
Stream Class: `C
Receiving Stream: Ararat River
Permitted Flow: 1.5/3.0 MGD
Drainage Basin: Yadkin -Pee Dee River Basin
Sub -Basin: 03-07-03
NPDES Permit NC0026646
Surry County

Permit NC0026646
A. (1) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [0.5 MGD]
During the period beginning upon the effective date of the permit and lasting until the Division of Water Quality grants
written authorization to increase the facility's flow limit, the Permittee is authorized to discharge municipal wastewater from
outfall 001. Such discharges shall be limited and monitored by the Permittee as specified below:
PARAMETER
LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Weekly
Average
Daily
y Maximum
Measurement
Frequency t
Sample
Type
Sample Location'
Flown
0.5 MGD
Continuous
Recording
Influent or Effluent
BOD, 5-day, 20°C3
30.0 mg/L
45.0 mg/L
Weekly
Composite
Influent & Effluent
Total Suspended Solids3
30.0 mg/L
45.0 mg/L
Weekly
Composite
Influent & Effluent
NH3-N (April 1 - October 31)
28.6 mg/L
35.0 mg/L
Weekly
Composite
Effluent
NH3-N (November 1- March 31)
Weekly
Composite
Effluent
Dissolved Oxygen4
Weekly
Grab
Effluent, U & D6
Fecal Coliform
(geometric mean)
200/100 mL
400/100 mL
Weekly
Grab
Effluent, U & D6
Temperature
Daily
Grab
Effluent
Temperature
Weekly
Grab
U & D6
Conductivity
Weekly
Grab
U & D6
Oil and Grease
Monthly
Grab
Effluent
Total Nitrogen
(NO2+ NO3 + TKN)
Monthly
Composite
Effluent
Total Phosphorus
Monthly
Composite
Effluent
pH
> 6.0 and < 9.0 standard units
Weekly
Grab
Effluent
Chronic Toxicity5
Quarterly
Composite
_
Effluent
Total Lead
Quarterly
Composite
Effluent
Total Copper
Monthly
Composite
Effluent
Total Residual Chlorines
28 NgfL
,
2/week
Grab
Effluent
Total Zinc
Monthly
Composite
Effluent
Notes:
1. U: Upstream at least 100 feet from the outfall. D: Downstream approximately 0.4 miles at NCSR 2044. Instream monitoring
shall be grab samples collected 3/week (Jun -Sep) and 1/week (Oct -May).
2. When the most recent 12-month flow average is 90% of permitted flow (0.45 MGD), permittee shall send written request to DWQ to
operate under the 1.5 MGD permit effluent page.
3. The monthly average effluent BOD5 and Total Suspended Solids concentrations shall not exceed 15% of the respective influent value
(85% removal).
4. The daily average dissolved oxygen effluent concentration shall not be less than 5.0 mg/L.
5. Chronic Toxicity (Ceriodaphnia), P/F, no significant mortality and no observable inhibition of reproduction at 1 %; January, April,
July, and October; see A. (3). TOXICITY MONITORING MUST BE PERFORMED IN CONJUNCTION WITH METALS
MONITORING.
6. Instream monitoring is waived as long as this facility is a member of the Yadkin -Pee Dee River Basin Association. If the facility ends
its membership in the Yadkin -Pee Dee River Association, instream monitoring requirements as specified in this permit take effect
immediately.
7. The Division shall consider all effluent total residual chlorine values reported below 50 ugll 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 fall below 50 ug/I.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

Permit NC0026646
A. (2) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [1.5 MGD]
During the period beginning upon written authorization by the Division to increase flow and lasting until expiration, the
Permittee is authorized to discharge domestic and industrial wastewater from outfall 001. Such discharges shall be limited
and monitored by the Permittee as specified below:
PARAMETER
LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
Location
_
Flow
1.5 MGD
Continuous
Recording
I or Effluent
BOD, 5-day, 20°C2
30.0 mg/L
45.0 mg/L
3/week
Composite
E,I
Total Suspended Sollds2
30.0 mg/L
45.0 mq/L
3/week
Composite
E,I
NH3-N (April 1- October 31)
28.6 mg/L
35.0 mq/L
3/week
Composite
Effluent
NH3-N (November 1- March 31)
3/week
Composite
Effluent
Dissolved 0xygen3
3/week
Grab
Effluent, U & D5
Fecal Coliform
jgeometric mean)
200/100 mL
400/100 mL
3/week
Grab
Effluent, U & D5
Temperature
Daily
Grab
Effluent
Temperature
3/week
Grab
U & D5
Conductivity
3/week
Grab
U & D5
Oil and Grease
2/Month
Grab
Effluent
Total Nitrogen
(NO2+ NO3 + TKN)
Weekly
Composite
Effluent
Total Phosphorus
Weekly
Composite
Effluent
pH
> 6.0 and < 9.0 standard units
3/Week
Grab
Effluent
Chronic Toxicity'
Quarterly
Composite
Effluent
Total Lead
Quarterly
Composite
Effluent
Total Copper
2/month
Composite
Effluent
Total Residual Chlorine6
28 dug/L
3/week
Grab
Effluent ,
_
Total Zinc
2/month
Composite
Effluent
Notes:
1. U: Upstream at least 100 feet from the outfall. D: Downstream approximately 0.4 miles at NCSR 2044. lnstream
monitoring shall be grab samples collected 3/week (Jun -Sep) and 1/week (Oct -May).
2. The monthly average effluent BOD5 and Total Suspended Solids concentrations shall not exceed 15% of the respective influent
value (85% removal).
3. The daily average dissolved oxygen effluent concentration shall not be less than 5.0 mg/L.
4. Chronic Toxicity (Ceriodaphnia), P/F, no significant mortality and no observable inhibition of reproduction at 3 %;
January, April, July, and October; see A. (3). TOXICITY MONITORING MUST BE PERFORMED IN CONJUNCTION WITH
METALS MONITORING.
5. Instream monitoring is waived as long as this facility is a member of the Yadkin -Pee Dee River Basin Association. If the facility
ends its membership in the Yadkin -Pee Dee River Association, instream monitoring requirements as specified in this permit take
effect immediately.
6. The Division shall consider all effluent total residual chlorine values reported below 50 ug/I 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 fall below 50 ug/I.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

Permit NC0026646
A. (3) CHRONIC TOXICITY PASS/FAIL PERMIT LIMIT (Quarterly) at 0.5 MGD
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to
Ceriodaphnia dubia at an effluent concentration of 1%.
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 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 permit condition will 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-1 (original) is sent to the below address. If reporting Chronic Value results using the parameter
code THP3B, DWQ Form AT-3 (original) is to be sent to the following address:
Attention: DENR/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 of flow from the facility during a month in which toxicity monitoring is required, the
permittee will complete the information located at the top of the aquatic toxicity (AT) test form indicating the
facility name, permit number, pipe number, county, and the month/year of the report with the notation of "No
Flow" in the comment area of the form. The report shall be submitted to the Environmental Sciences Section at
the address cited above.
Should the permittee fail to monitor during a month in which toxicity monitoring is required, 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.

Permit NC0026646
A. (4) CHRONIC TOXICITY PASS/FAIL PERMIT LIMIT (Quarterly) at 1.5 MGD
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to
Ceriodaphnia dubia at an effluent concentration of 3%.
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 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 permit, condition will 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-1 (original) is sent to the below address. If reporting Chronic Value
results using the parameter code THP3B, DWQ Form AT-3 (original) is to be sent to the following address:
Attention: DENR/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 of flow from the facility during a month in which toxicity monitoring is required, the
permittee will complete the information located at the top of the aquatic toxicity (AT) test form indicating the
facility name, permit number, pipe number, county, and the month/year of the report with the notation of "No
Flow" in the comment area of the form. The report shall be submitted to the Environmental Sciences Section at
the address cited above.
Should the permittee fail to monitor during a month in which toxicity monitoring is required, 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.

Permit NC0026646
A. (5) EFFLUENT POLLUTANT SCAN
The Permittee shall perform an annual Effluent Pollutant Scan for all parameters listed in the attached table (using a sufficiently
sensitive detection level in accordance with 40 CFR Part 136). Samples shall represent seasonal variations. Unless otherwise
indicated, metals shall be analyzed as "total recoverable."
Ammonia (as N) Trans-1,2-dichloroethylene Bis (2-chlorocthyl) ether
Chlorine (total residual, TRC) 1,1 -dichloroe thylene Bis (2-chloroisopropyl) ether
Dissolved oxygen 1,2-dichloropropane Bis (2-ethylhexyl) phthalate
Nitrate/Nitrite ' 1,3-dichloropropylene 4-bromophcnyl phenyl ether
Kjcldahl nitrogen }3thylbenzene 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-tctrachloroethane 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 Add-ealraclahle comporrndr:• Diethyl phthalate
Mercury P-chloro-m-cresol Dimethyl phthalate
Nickel 2-chlorophenol 2,4-dinitrotoluene
Selenium 2,4-dichlorophenol 2,6-dinitrotoluene
Silver 2,4-dimethylphcnol 1,2-diphenylhydrazine
Thallium 4,6-dinitro-o-cresol Fluoranthene
Zinc 2,4-dinitrophenol Fluorene
Cyanide 2-nitrophenol Hexachlorobenzene
Total phenolic compounds 4-nitrophcnol I Iexachlorobutadiene
Volalrk manic mnooxnd, Pentachlorophenol I lexachlorocyclo-pentadiene
Acrolcin Phenol 1lexachloroethane
Acrylonitrile 2,4,6-trichlorophenol Indcno(1,2,3-cd)pyrene
Benzene Base-neulral compounds, Isophorone
Bromoform Acenaphthene Naphthalene
Carbon tetrachloride Acenaphthylene Nitrobenzene
Chlorobenzene Anthracene N-nitrosodi-n-propylamine
Chlorodibromomethane Benzidine N-nitrosodimethylamine
Chloroethane Benzo(a)anthraccne N-nitrosodiphenylamine
2-chlorocthylvinyl 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-PPA1 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: Tuesday, January 05, 2010 2:13 PM
To: Nowell, Jackie
Subject: re NC0026646, Pilot Mountain WWTP
EPA has no comments on this draft permit.

Winston-Salem Journal
Advertising Affidavit
Winston-Salem Journal
P.O Box 3159
Winston-Salem, NC 27102
NCDENR/DWQ/POINT SOURCE BRANCH
ATTN: DINA SPRINKLE
1617 MAIL SERVICE CENTER
RALEIGH, NC 27699-1617
Account Number
3376309
Date
December 18, 2009
Date
Category
Description
Ad Size
Total Cost
12/18/2009
Legal Notices
PUBLIC NOTICE North Carolina Environment
2 x 36 L
256.83
PUBLIC NOTICE
North Carolina Environmental
Management Commission/NPDES Unit
1617 Mail Service Center
Raleigh NC 27699-1617
Notice of Intent to Issue a
NPDES Wastewater Permit
The North Carolina Environmental Manage-
ment Commission proposes to issue a NPDES
wastewater discharge permit to the person(s)
listed below.
Written comments regarding the proposed per-
mit will be accepted until 30 days after the pub-
lish date of this notice. The Director of the NC
Division of Water Quality (DWQ) may hold
a public hearing should there be a significant
degree of public interest. Please mall com-
ments and/or information requests to DWQ at
the above address. Interested persons may vis-
it the DWQ at 512 N. Salisbury Street, Raleigh
NC to review information on file. Additional
information on NPDES permits and this notice
may be found on our website: www.ncwater
quality .org. or by calling [phone].
The Town of Pilot Mountain requested renewal
of NC0026646 for Pilot Mountain WWTP in Surry
County: This permitted discharge is treated
municipal wastewater to Ararat River, Yadkin -
Pee Dee River Basin.
WSJ: December IS. 2009
Media General Operations, Inc.
Publisher of the
Winston-Salem Journal
Forsyth County
Before the undersigned, a Notary Public of Forsyth County, North Carolina, duly
commissioned, qualified, and authorized by law to administer oaths, personally appeared
S.A. Bragman, who by being duly sworn deposes and says: that she is the Assistant
Controller of the Winston-Salem Journal, engaged in the publishing of a newspaper known
as Winston-Salem Journal, published, issued and entered as second class mail in the City of
Winston-Salem, in said County and State: that she is authorized to make this affidavit and
sworn statement: that the notice or other legal advertisement, a true copy of which is
attached hereto, was published in the Winston-Salem Journal on the following dates:
12/18/2009
and that the said newspaper in which such notice, paper document, or legal advertisement
was published was, at the time of each and every such publication, a newspaper meeting all
the requirements and qualifications of Section 1-597 of the General Statutes of North
Carolina and was a qualified newspaper within the meaning of Section 1-597 of the General
Statutes of North Carolina.
This 18th day of December, 2009
(signature of pe on making affidavit)
Sworn to and subscribed before me, this 18th day of December, 009
My Commission expires S*LJ,
IC, 2 O 10
K1MALEY JOHNSON
NOTARY PUBLIC
''ORSY Ti i COUNTY
STATE OF NORTH CAR Li
MY COMMISSION EXPIRE
THIS IS NOT A BILL. PLEASE PAY FROM INVOICE. THANK YOU

DENR/DWQ
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
NPDES No. NC0026646
FACILITY INFORMATION
Applicant/Facility Name:
Town of Pilot Mountain
Applicant Address:
124 W. Main St., Pilot Mountain NC 27041
Facility Address:
601 Lynchburg Road, Pilot Mountain NC 27041
Permitted Flow (MGD):
0.5/1.5
Facility Class:
III
County:
Surry
Type of Waste:
Municipal
Regional Office:
Winston-Salem
Facility/Permit Status:
(i.e. New, Modification, Existing
or Renewal)
Renewal
USGS Topo Quad:
B 16SE, "Siloam"
STREAM CHARACTERISTICS
Receiving Stream:
Ararat River
303(d) Status:
Impaired for turbidity
Stream Classification:
C
Winter 7Q10 (cfs):
163 .
Subbasin:
03-07-03
30Q2 (cfs):
—
Drainage Area (mi2):
287
Average Flow (cfs):
379
Summer 7Q10 (cfs)
82.2
IWC (%):
1% @ 0.5 MGD /
3% @ 1.5 MGD
SUMMARY
This facility is a major municipal treatment plant operating in Surry County that serves 1300
people. Town has separate sewer collection system. Facility has a permitted flow of 1.5 MGD
discharging into Ararat River, however is currently discharging at a reduced flow of 0.5 MGD.
According to the application, the Town of Pilot Mountain no longer has a pretreatment
program.
The Ararat River is on the 2006 303 d list for impaired streams due to a standard violation for
turbidity as the main cause of impairment. The draft 2008 303d list has the Ararat River
impaired for turbidity also. The Pilot Mountain WWTP is located in the impaired segment of
the Ararat River.
With the exception of some metals monitoring requirements, all existing limits for the Pilot
Mountain WWTP will be renewed in this permit evaluation. Metals are evaluated in the
Reasonable Potential Analysis section.
TOXICITY TESTING:
Type of Toxicity Test:
Existing Limit:
Recommended Limit:
Monitoring Schedule:
Chronic P/F
001: Chronic P/F 1 % at 0.5 MGD; 3 % at 1.5 MGD
001: Chronic P/F 1 % at 0.5 MGD; 3 % at 1.5 MGD
January, April, July, and October
The facility has been consistently passing its WET tests since January 2005 with one exception.
There was an invalid test in January 2009, the following test in April 2009 was a Pass. The tox
Page 1
Version: December 15, 2009

test is run at 3%. It is recommended that the toxicity test requirement be renewed at both test
limits of 1% at 0.5 MGD and 3% at 1.5 MGD.
COMPLIANCE SUMMARY:
Facility appears to be well operated. Compliance inspections conducted by Regional Office
staff within the past two years rated the plant as compliant. There were few permit violations
since January 2004. There were NOVs issued in June 2006 and April 2009 for violations of
fecal coliform and total suspended solids, respectively.
INSTREAM MONITORING:
Instream monitoring is required for temperature, dissolved oxygen, fecal coliform, and
conductivity. The facility is a member of the Yadkin -Pee Dee Monitoring Coalition, and all
their instream monitoring is conditionally waived for the duration of their membership in the
Coalition.
REASONABLE POTENTIAL ANALYSIS
The following parameters are monitored through the permit: Cd, Cn, Pb, Cu, Zn, Ag,
Reasonable potential analyses were conducted for all the parameters monitored in the permit.
Data was reviewed from August 2006 through July 2009. (see attached).
Cadmium, Cyanide, and Silver- all analyzed data was below detection. The
maximum predicted concentrations were below the chronic and acute allowable
concentrations. There was no reasonable potential to exceed water quality or action
level standards instream. It is recommended that monthly monitoring for
cadmium, cyanide and silver be dropped from the permit.
Lead —nearly all analyzed data was below detection. The maximum predicted
concentration was below the chronic and acute allowable concentrations. There is
no reasonable potential to exceed the water quality standard. It is reconunended
that the limit for lead be dropped from the permit and quarterly monitoring
only remain in the permit.
Copper and Zinc- both are NC action level standards. The maximum predicted
concentrations were below the chronic allowable concentrations but higher than the
acute allowable concentrations. Because the facility has consistently passed its
toxicity tests with no problems, limits on the action level constituents, copper and
zinc are not recommended. It is recommended that the continuation of monthly
monitoring in the permit will remain.
Mercury was reviewed although only two data points (7.81 ng/1 and 5.09 ng/l)
were reported in the priority pollutant analyses. With limited data, there was no
reasonable potential shown to exceed the chronic allowable concentration. No
limits or monitoring for mercury will be added to the permit.
Bis (2-ethylhexyl) phthalate and Di-n-octyl phthalate were detected in a 2007 PPA
however 2 subsequent PPAs in 2008 did not detect these substances. No
monitoring is recommended since the prior hits may have been laboratory
contaminants.
Page 2
Version: December 15, 2009

PROPOSED CHANGES: -
• Monthly monitoring for cadmium, cyanide and silver will be dropped based on no
reasonable potential to exceed water quality standards.
• The daily maximum limit for lead will be dropped due to no reasonable potential to exceed
the allowable concentration. However will recommend that quarterly monitoring for lead
remain in the permit.
PROPOSED SCHEDULE FOR PERMIT ISSUANCE:
Draft Permit to Public Notice: December 16, 2009
Permit Scheduled to Issue: February 1, 2010 (est.)
STATE CONTACT:
If you hay y questions on any of the above information or on the attached permit, please
contact J: 'e Nowell at (919) 17-638% or [e-mail].
N • � .� l , r DATE: f./ WJ/
RE iY• NAL • FFICE COMMENT:
NAME: DATE:
Page 3
Version: December 15, 2009

REASONABLE POTENTIAL ANALYSIS
Pilot Mountain WWTP
NC0026646
Time Period 812006-712009
Qw (MGD) 0.5
7010S (cfs) 82.2
7Q10W (cfs) 163
3002 (cfs) 0
Avg. Stream Flow, QA (cfs) 379
RecYing Stream Ararat River
WWTP Class II
f WC (%) @ 7Q10S 0.934
@ 7QIOW 0.4732
@ 3002 N/A
@ QA 0.2041
Stream Class C
Outfall 001
Qw = 0.5 MGD
PARAMETER
TYPE
(1)
STANDARDS &
CRITERIA (2)
PQL
Units
REASONABLE POTENTIAL RESULTS
RECOMMENDED ACTION
NCWas/
Chronic
%FAY/
Acute
a /Oet liaProd Ca, Nimbi•Cw
Arsenic
C
10
ug/L
0 0
N/A
Acute: NIA
Chronic: 4,900
---------------------_—_—_—___
Beryllium
C
6.5
ug/L
0 0
NIA
Acute: NIA
3,185
-----__
Cadmium
NC
2
15
ug/L
41 0
4.0
Acute: 15
_ _ _ _ _ _
Chronic: 214
AU data below detection. No RP shown to exceed chronic
acute allowable cone. No limit or monitoring recommender
in the per it Monthly mornttortng can be dropped.---
Chromium
NC
50
1.022
ug/L
0 0
NIA
Acute: 1,022
_ _ _._
Chronic. 5,353
-------------------_----_-----
Copper
NC
7
AL
7.3
ug&L
38 38
507.2
Acute: 7
_ _-_ _ _
Chronic: 749
Cu Is NC action !eve! standard. Tox test results detemm!
if limit given. AU passes for past 3_years. No RP toexce< e
chronic allowable. But max. pred Cori. Exceeds acute 1
allowable. Continue monthly monitoring in permit
Cyanide
NC
5
N
22
10
ugIL
35 0
5.0
Acute: 22
_ _ _ _ _ _
Chronic: 535
Most data below detection. No RP shown to exceed chron
or acute allowablecone. No_t!mWmonitadrec ng ommender
in the permtt Monthly monitoring can be dropped.-
Fluoride
NC
1.800
ug/L
0 0
N/A
Acute: N/A
reh—roWcTifi277iF
--____--_•_•___--_----___•____
Lead
NC
25
N
33.8
ug/L
72 1
31.7
Acute: 34
_ _ -_2,6_
Chronic: 77_
Most data below detection. No RP shown to exceed chron
or acute allowable conc. Recommend that lead limit be
dropped from permit -Recommend quaderiy monitoring be
be added.
Mercury
NC
12
2.0000
ng/L
2 2
Note: n<12
Limited data
22.4147
set
Acute: NIA
Min. data used in analysis. No RP shown to exceed chron
allowable. No monitoring recommended in permit
_ _ _
Chron- 1,285
Parameter will be monitored in annual PPA.
Molybdenum
A
3,500
ug/L
0 0
NIA
Acute: WA
_ __ _ UE! _
Chronic: #VAL
---___--__-----_--_-_--___—_—_
Nickel
NC
88
261
ug/L
0 0
N/A
Acute: 261
Chronic: 9,422
F ___ _
---_____—_—_—_—_—_—___—___—_—_
Phenols
A
1
N
ug/L
0 0
NIA
Acute: N/A
_ __ _ _
Chronic: #VALUE!
—_--____—___—___—_____—___—•—_
Selenium
NC
5.0
56
ug/L
0 0
NIA
Acute: 56
_ ___ _
Chronic: 535
—_______—_—_—_—___—___—___—___
Silver
NC
0.06
AL
1.23
ug/L
40 0
7.5
Acute: 1
_ _--___—
Chronic: 6
Ag is NC action level standard. Alt values below detection.
Although_RPrhown_aUdatabelowdetection!Inco2006.1
shows not a parameter of concem. Recommend monitorir
be dropped from permit
Zinc
NC
50
Al.
67
ug/L
39 37
701.1
Acute: 67
_ _
Zn is NC action level standard. Tox test results deternin
if limit given._ All paBut Exceedsacute 4
allowable. Continue monthly monitoring in permit
• Legend:
C = Carcinogenic
NC rs Non -carcinogenic
A = Aesthetic
•' Freshwater Discharge
26646rpav22009.xis, rpa
10/27/2009

REASONABLE POTENTIAL ANALYSIS
3
4
Cadmium
Chromium
Date Data
BOL=1/2DL
Results
Date Data BDLL1/2DL
Results
1
Vii
2
1.0
Std Dev.
0.7482
1
Std Dev.
NO DATA
2
_
2
1.0
Mean
1.6220
2
Mean
NO DATA
3
`S..
2
1.0
C.V.
0.4613
3
_
C.V.
NO DATA
4
r4
2
1.0
n
41
4
.,
n
0
5
2
1.0
5
6
2
1.0
Mutt Factor =
1.6100
6
Y
Mult Factor =
N/A
7
2
1.0
Max. Value
2.5 uglL
7
„
Max. Value
0.0 ug/L
8
.
2
1.0
Max. Pred Cw
4.0 ug/L
8
g
Max. Pred Cw
N/A ug/L
9
<'
2
1.00
9
r,
10
11`:
"i
Sk.I
2
2
1.00
1.00
10
11
~ayy
f3
12
2
1.00
12
13
" 5,
2
1.00
13
I`
14
;<
2
1.00
14
15
2
1.00
15
16
-;
2
1.00
16
17
2
1.00
17
18
2
1.00
18
19
2
1.00
19
20
`-;4°
2
1.00
20
21
=
2
1.00
21
j
22
%;.<11
2
1.00
22
<;a1
23
<,
2
1.00
23
24
'<1
2
1.00
24
25
..
5
2.50
25
�-
26
:.
5
2.50
26
27<'
5
2.50
27
28
'--;
5
2.50
28
29
`c+
5
2.50
29
30
"<.
5
2.50
30
31
.:.<
5
2.50
31
32
5
2.50
32
33
5
2.50
33
34
<;
5
2.50
34
35
c
5
2.50
35
36
•-;
5
2.50
36
; }
37
" .
5
2.50
37
38
5
2.50
38
-.
39
,-
5
2.50
39
4I
40
c�
5
2.50
40
sa
41
5
2.50
41
42
42
'_
26646rpav22009.xls, data
-1 - 10/27/2009

REASONABLE POTENTIAL ANALYSIS
5
6
.
Copper
Cyanide
Date
Data
BDL=112DL
Results
Date
Data
BDL=112DL
Results
1
58.
58.0
Std Dev.
46.5097
1
c <1
5
5.0
Std Dev.
0.0000
2
?
59.
59.0
Mean
51.6579
2
';fit
5
5.0
Mean
5.0000
3
`?
33.
33.0
C.V.
0.9003
3
<i
5
5.0
C.V.
0.0000
4
"'
;:
6.
6.0
n
38
4
r .,
; c�
5
5.0
n
35
5
34.
34.0
5
'<
5
5.0
6
27.
27.0
Mult Factor =
2.3700
6
'
5
5.0
Mult Factor =
1.0000
7
.
30.
30.0
Max. Value
214.0 ug/L
7
••<a
5
5.0
Max. Value
5.0 ug/L
8
=;
7.
7.0
Max. Pred Cw
507.2 ug/L
8
k<;
5
5.0
Max. Pred Cw
5.0 ug/L
9
53.
53.0
9
'><
5
5.000
10
43.
43.0
10
*'<1
5
5.000
11
46.
46.0
11
C
5
5.000
12
48.
48.0
12
~<
5
5.000
13
35.
35.0
13
<
5
5.000
14
36.
36.0
14
<
5
5.0
15
33.
33.0
15
<-
5
5.0
16
22.
22.0
16
<
5
5.0
17
" "'
30.
30.0
17
: <:'
5
5.0
18
"'
44.
•44.0
18
-'<.
5
5.0
19
=
34.
34.0
19
:-c;
5
5.0
20
60.
60.0
20
5
5.0
21
70.
70.0
21
<
5
5.0
22
44.
44.0
22
<
5
5.0
23
28.
28.0
23
: <
5
5.0
24
79.
79.0
24
<;
5
5.0
25
29.
29.0
25
- <!
5
5.0
26
214.
214.0
26
`+<'
5
5.0
27
186.
186.0
27
<
5
5.0
28
37.
37.0
28
. <
5
5.0
29
39.
39.0
29
<
5
5.0
30
49.
49.0
30
<:
5
5.0
31
32.
32.0
31
<`
5
5.0
32
Feb-2009
201
201.0
32
"<'
f .:•'
5
5.0
33
41
41.0
33
Feb-2009
• <-.
5
5.0
34
26
26.0
34
Mar-2009
-c
10
5.0
35
38
38.0
35
Mar-2009
'`-c •
5
5.0
36
30
30.0
36
37
:- ''=;
41
41.0
37
38
";<:
41
41.0
38
39
39
40
40
41
41
42
, .....
42
-2-
26646rpav22009xls, data
10/27/2009

REASONABLE POTENTIAL ANALYSIS
8
Lead
Date
1 Sep-2007
2 Feb-2009
3 Feb-2009
4 Mar-2009
5 Mar-2009
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
Data
:aC
•
tr
r
BDL=1/2DL Results
19 19.0 Std Dev. 1.9734
5 2.5 Mean 2.7361
5 2.5 C.V. 0.7212
10 5.0 n 72
5 2.5
3 1.5 Mult Factor = 1.6700
3 1.5 Max. Value 19.0 ug/L
5 2.5 Max. Fired Cw 31.7 ug/L
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
5 2.5
26646rpav22009.xls, data
-1 - 10/27/2009

REASONABLE POTENTIAL ANALYSIS
•
705 2.5
71 5 2.5
72 ,. c:,� 5 2.5
is
73
Lv4.n
-2-
26646rpav22009.xts, data
10/27/2009

REASONABLE POTENTIAL ANALYSIS
14
15
Silver
Zinc
Date
Data
BDL=112DL
Results
Date
Data
BDL=112DL
Results
1
'<1
10
5.0
Std Dev.
1.2083
1.=
26.
26.0
Std Dev.
72.1489
2
10
5.0
Mean
3.2125
2
€ 36'
36.0
Mean
86.2821
3
24
10
5.0
C.V.
0.3761
3
23.
23.0
C.V.
0.8362
4
10
5.0
n
40
4
'%t''
n
39
5
,
10
5.0
5
61.
61.0
6
10
5.0
Mult Factor =
1.4900
6
50.
50.0
Mult Factor =
2.2400
7
? .
10
5.0
Max. Value
5.0 ug/L
7
j'a 54.
54.0
Max. Value
313.0 ug/L
8
R .
10
5.0
Max. Pred Cw
7.5 ug/L
8
: _ 78.
78.0
Max. Prod Cw
701.1 ug/L
9
'=
10
5.0
9
- 108.
108.0
10
<,
is
10
5.0
10
_-� 133.
133.0
11
2
1.0
11
> ? 123.
123.0
12
Feb-2009<;
10
5.0
12
X S 121.
121.0
13
Mar-2009
''''_`
10
5.0
13
ia:�a 90.
90.0
14
-'<i
5
2.5
14
"=-` 98.
98.0
15
<'
5
2.5
15
32.
32.0
16
:Pd
rc
5
2.5
16
is
10.
10.0
17
r.i
5
2.5
17
'F,y 56.
56.0
18
c
5
2.5
18
'w 107.
107.0
19
•
5
2.5
19
-% 79.
79.0
20,E
5
2.5
20
127.
127.0
21
5
2.5
21
87.
87.0
1 r=
5
2.5
22
84.
84.0
23tri°<`-
5
2.5
23
= - 29.
29.0
24
c-
5
2.5
24
81.
81.0
25
:=
5
2.5
25
' `' 104.
104.0
26
z
5
2.5
26
,- 10.
10.0
27
<
5
2.5
27
`j 37.
37.0
28
y,.
2.5
28
?.
29
5
2.5
29
48.
48.0
30
_
5
2.5
30
` 1 97.
97.0
31
E.
5
2.5
31
,-� 115.
115.0
32
c
5
2.5
32
Nov-2006
10
5.0
33
34
x;�.
,.<;
5
5
2.5
2.5
33
34
Oct-2007
10
-�
,�~,: 44
5.0
44.0
35
..
5
2.5
35
''` 25
25.0
36
•
5
2.5
36
'"f 73
73.0
37
38
ems`
5
5
2.5
2.5
37
38
280
212
280.0
212.0
39
5
2.5
39
254
254.0
40
=
5
2.5
40
t 313
313.0
41
tc:,
42
z..
42
43
43
44
44
? `:{
26646rpav22009.xts, data
-1 - 10/27/2009

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Permit NC0020966
A. (1.) EFFLUENT LINIITATIONS AND MONITORING REQUIREMENTS - DRAFT
During the period beginning on the effective date of the permit and lasting until discharge discharges
above 0.006 MGD, the Permittee is authorized to discharge from outfall 001. Such discharges shall be
limited and monitored by the Permittee as specified below:
EFFLUENT
CHARACTERISTICS
\, LIMITS
\
MONITORING RE UIREMENTS
Monthly
Average\
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample ype
Sample
Location
Flow'
0.006 MGD`
\\
Weekly
In ntaneous
Influent or
Effluent
BOD, 5-day (20°C) 2
30.0 mg/L
45 0 mg/L
Weekl
Grab
Influent and
Effluent
Total Suspended Solids2
30.0 mg/L
45.0 nigKL
/
eekly
Grab
Influent and
Effluent
NH3 as N
\
//
2/Month
Grab
Effluent
Fecal Coliform (geometric
mean)
200 / 100 ml
400 / 100 ml
\, /
�,/
Weekly
Grab
Effluent
Total Residual Chlorine3
/
/ 28\µg/L
'`,
2/week
Grab
Effluent
Temperature (°C)
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Weekly
Grab
Effluent
pH4
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Weekly
Grab
Effluent
Footnotes:
1. When the most recent 12 mont flow average is 95% of pe 'tted flow (0.0057 MGD), permittee
shall send written request to Q to operate under the 0.05 GD permit effluent page.
2. The monthly average efflu t BOD and Total Suspended Soli concentrations shall not exceed
15% of the respective i uent values (85% removal).
3. The Division shall cod ider all effluent total residual chlorine vale s reported below 50 /,tg/1 to be
in compliance with he permit. However, the Permittee shall contin a to record and submit all
values reported b a North Carolina certified laboratory (including fi d certified), even if these
values fall Belo 50 µg/1.
4. The -pH shall, of be less than 6.0 standard units nor greater than 9.0 standard units.
THERE SHALL/ E NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN TRACE AMOUNTS.

E--Pe
L54-A4A0,/