NC0020940_Permit Modification_20000503

NPDES DOCIMENT :SCANNING COVER SHEET
NC0020940
Murphy WWTP
NPDES Permit:
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Report
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
May 3, 2000
This document is printed on reuse paper - ignore any
content on the reirerse side

State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Bill Holman, Secretary
Kerr T. Stevens, Director
May 5. 2000
The Honorable William N. Hughes. Mayor
Town of Murphy
Post Office Box 150
Murphy. North Carolina 28802
A��
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
Subject: NPDES Permit Modification
Permit Number NC0020940
Murphy \V\VTP
Cherokee County
Dear Mr. Storrow:
The Division issued NPDES permit number NC0020940 to the Town of Murphy on January 23.
1998. The Division has reviewed your request for permit modification at the subject facility. Specifically. you
requested that the permitted floe- be increased from 0.925 MGD to 1.4 MGD. In accordance with your permit
modification request and speculative effluent limitations issued to the Town on July 20. 1998. the Division is
forwarding herewith a modification to the subject permit. This permit modification incorporates effluent
limitations for a permitted flow of 1.4 MGD. Please note that construction of facilities beyond 0.925 MGD
shall not commence until an Authorization to Construct has been requested by the Town and subsequently
issued by the Division. Furthermore. upon completion of construction to 1 .4 MGD, permit compliance will be
judged based on that flow.
Enclosed please find the modified NPDES permit. The old permit should be discarded. This permit
modification 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
December 6. 1985.
Please take notice that this permit is not transferable. Part Il. E.4. addresses the requirements to be
followed in case of change in ownership or control of this discharge. This permit does not affect the legal
requirement 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
government permit that may be required.
If you have any questions concerning this permit, please contact \lr. Mark McIntire at telephone
number [phone]. extension 553.
Sincerely
Original Signed By
David A. Goodrich
Kerr T. Stevens
Cc: Central Files
NPDES Permit File
Asheville Regional Office
Point Source Compliance/Enforcement Unit
Aquatic Toxicology Unit
EPA, Roosevelt Childress
1617 MAIL SERVICE CENTER. RALEIGH, NORTH CAROLINA 27699-1617 - TELEPHONE [phone]/FAX [phone]
AN EQUAL OPPORTUNITY AFFIRMATIVE ACTION EMPLOYER - 509E RECYCLED/ 10% POST -CONSUMER PAPER

Permit No. NC0020940
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
PERMIT
TO DISCI -LARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provision of North Carolina General Statute 145-215.1, other lawful
standards and regulations promulgated and adopted by the North Carolina Environmental
Management Commission, and the Federal Water Pollution Control Act, as amended.
Town of Murphy
is hereby authorized to discharge wastewater from a facility located at
Murphy Wastewater Treatment Plant
Payne Street
Murphy
Cherokee County
to receiving waters designated as the Hiwassee River in the Hiwassee 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 June 1, 2000.
This permit and authorization to discharge shall expire at midnight on December 31, 2002.
Signed this day May 5, 2000.
Original Signed By
David A. Goodrich
Kerr T. Stevens, Director
Division of Water Quality
By Authority of the Environmental Management Commission

Permit No. NC0020940
SUPPLEMENT TO PERMIT COVER SHEET
Town of Murphy
is hereby authorized to:
1. Continue operation of an existing 0.925 NMGD wastewater treatment system consisting of an
extended aeration plant in parallel with an Aeromod unit. flow splitters. clarifiers. effluent
chlorination and dechlorination. flow measurement. aerobic sludge digestion and sludge drying
beds located at the Town's Wastewater Treatment Plant on Payne Street. Murphy. Cherokee
County:
2. After receiving an Authorization to Construct from the Division of Water Quality. construct
facilities such that the treatment capacity at the above referenced facility is 1.4 MGD: and
5. Discharge from said treatment works at the location specified on the attached map into the
Hiwassee River. a class C water in the Hiwassee River Basin.

A (1) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - FINAL
Permit No. NC0020940
During the period beginning on the effective date of the permit and lasting until expansion above 0.925 MCI) or expiration, the Pcrmittec is authorized to discharge from outfall(s) serial
number 001. Such discharges shall be limited and monitored by the Pcrmittec as specified below:
EFFLUENT CHARACTERISTICS
LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
Locations
Flow (MGD)
0.925
Continuous
Recording
1 or E
BOD, 5-day. 20°C2
30.0 mg/L
45.0 mg/L
3/Week
Composite
1. E
Total Suspended Rcsiduc2
30.0 mg/L
45.0 mg/L
3/Week
Composite
1. E
NH3-N
3/Week
Composite
E
Fecal Coliform (geometric mean)
200 / 100 ml
400 / 100 ml
3/Wcek
Grab
E
Total Residual Chlorine
28 pg/L
3/Weck
Grab
E
Temperature
Daily
Grab
E
Total Nitrogen (NO2+NO3+TKN)
Semi -Annually
Composite
E
Total Phosphorus
Semi -Annually
Composite
E
Lead
2/Month
Composite
E
Cadmium
2/Month
Composite
E
Chromium
2/Month
Composite
E
Nickel
6.0 mg/I.
2/Month
Composite
E
Copper
Weekly
Composite
E
Silver
Weekly
Composite
E
Zinc
2/Month
Composite
E
Cyanide
2/Month
Grab
E
pH3
3/Week
Grab
E
Chronic Toxicity4
Quarterly
Composite
E
Notes:
Sample Locations: E - Effluent, 1 - Influent
2
The monthly average effluent HODS and Total Suspended Residue concentrations shall not exceed 1 5% of the respective influent value (85 % removal).
3 The pi I shall not be Icss than 6.0 standard units nor greater than 9.0 standard units.
4 Chronic Toxicity (Ceriodaphnia) at 1.5%; March, lune, September, December; See condition A(3) of the Supplement to Effluent Limitations page.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

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Facility Information
Latitude:
Longitude:
USGS Quad:
Stream Class:
Receiving Stream:
Pennitted Flow:
35°05'51"
84°02'29"
Murphy, G2SE
Hiwassee River
Phased at 0.925 and 1.4 MGD
Sub -Basin: 04-05-02
I5
Facffl
Location
Town of Murphy
NC0020940
Murphy Wastewater Treatment Plant

A (2) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - FINAL
Permit No. NC0020940
During the period beginning upon expansion above 0.925 MGD 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 CHARACTERISTICS
LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
Locations
Flow (MGD)
1.4
Continuous
Recording
I or E
BOD, 5-day, 20°C2
30.0 mg/L
45.0 mg/L
3/Week
Composite
1. E
Total Suspended Residue2
30.0 mg/L
45.0 mg/L
3/Week
Composite
1, E
NH3-N
3/Week
Composite
E
Fecal Coliform (geometric mean)
200 / 100 ml
400 / 100 ml
3/Week
Grab
E
Total Residual Chlorines
28 pg/L
3/Wcck
Grab
E
Temperature
Daily
Grab
E
Total Nitrogen (NO2+NO3+TKN)
Quarterly
Composite
E
Total Phosphorus
Quarterly
Composite
E
Lead
2/Month
Composite
E
Cadmium
2/Month
Composite
E
Chromium
2/Month
Composite
E
Nickel
2/Month
Composite
E
Copper
Weekly
Composite
E
Silver
Weekly
Composite
E
Zinc
2/Month
Composite
E
Cyanide
2/Month
Grab
E
pH4
3/Week
Grab
E
Chronic Toxicity'
Quarterly
Composite
E
Notes:
r Sample Locations: E - Effluent. 1 - Influent
2 The monthly average effluent BOD5 and Total Suspended Residue concenl ations shall not exceed 1 5% of the respective influent value (85 % removal).
3 The monitoring requirement and effluent limitation apply only if chlorine or chloi ine derivalivc is added for disinfection.
4 The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units.
Chronic Toxicity (Ceriodaphnia) at 1.7%; March. lune. September, December: See condition A(4) of the Supplement to Effluent Limitations page.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

Permit No. NC0020940
SUPPLEMENT TO EFFLUENT LIMITATIONS
AND MONITORING REQUIREMENTS
SPECIAL CONDITIONS
A (3). CHRONIC TOXICITY PERMIT LIMIT (QUARTERLY) - 0.925 MGD
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to
Ceriodaphnia dc,bia at an effluent concentration of 1.5%.
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 March. June. September, and
December. 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 CIA/ 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 11 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 THP5B for the Chronic Value. Additionally, D\VQ Form AT-5 (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.

Permit No. NC0020940
SUPPLEMENT TO EFFLUENT LIMITATIONS
AND MONITORING REQUIREMENTS
SPECIAL CONDITIONS - Continued
A (4). CONTINUED...
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.

Permit No. NC0020940
SUPPLEMENT TO EFFLUENT LIMITATIONS
AND MONITORING REQUIREMENTS
SPECIAL CONDITIONS - Continued
A (3). CONTINUED...
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.
A (4). CHRONIC TOXICITY PERMIT LIMIT (QUARTERLY) — 1.4 MGD
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to
Ceriodaphnia dubia at an effluent concentration of 1.7%.
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 March. June. September. and
December. 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. using the parameter code TGP3B for
the pass/fail results and THP3B for the Chronic Value. Additionally, D\VQ 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

c61,d(JD
(Form prepared by William C. Lassiter, General Counsel for North Carolina Press Association,
and approved by the Attorney General of North Carolina.)
CLIPPING OF
LEGAL ADVERTISEMENT
ATTACHED HERE
PUBLIC NOTICE
STATE OF NORTH CAROLINA
ENVIRONMENTAL MANAGEMENT
COMMISSION/NPDES UNIT
1617 MAIL SERVICE CENTER
RALEIGH, NC 27699-1617
NOTIFICATION OF INTENT TO ISSUE
A NPDES WASTEWATER PERMIT
On the basis of thorough staff and ap-
' plication of NC General Statute 143.21,
Public law 92-500 and other lawful stan-
dards and regulations, the North
Carolina Environmental Management
Commission proposes to issue a Na-
tional Pollutant Discharge Elimination
System (NPDES) wastewater discharge
permit to the person(s) listed on the at-
tached pages effective 45 days from the
publish date of this notice.Written com-
ments regarding the proposed permit
will be accepted until 30 days after the
publish date of this notice. All comments
received prior to that date are con-
sidered in the final determinations
regarding the proposed permit. The
Director of the NC Division .of Water
• Quality may decide to hold a public
meeting for the proposed permit should
the Division receive a significant degree
of public interest.Copies of the draft
permit and other supporting information
on file used to determine conditions per -
sent in the draft permit are available
upon request and payment of the costs
of reproduction. Mail comments and/or
requests for information to the NC Divi-
sion of. Water Quality at the above ad-
dress or call Ms. Christie Jackson at
[phone], extension 538. Please
include the NPDES permit number (at-
tached) in any communication. Interes-
ted persons may also visit the Division
of Water Quality at 512 N. Salisbury
Street, Raleigh,NC• 27604-1148 bet-
ween the hours of 8:00a.m. and
5:00p.m. to ' review information on
lile.NPDES Permit Number NC0020940,
Murphy, Town-WWTP, P.O. Box 130,
Murphy, NC 28906 has applied for a
modification for a facility located in
Cherokee County discharging treated
wasterwater into Hiwassee River in the
Hiwassee River Basin. Currently no
parameters are water quality limited.
This discharge may affect future al
locations in this portion of the receiving
stream.
2.23c '
NORTH CAROLINA
Cherokee County
AFFIDAVIT OF PUBLICATION
Before the undersigned, a Notary Public of said County and State, duly
commissioned, qualified, and authorized by law to administer oaths,
personally appeared
Weaver Carringer
who being first duly sworn, deposes and says: that ... he is
Publisher
(Owner, publisher or employee authorized to make this affidavit)
engaged in the publication of a newspaper known as
THE CHEROKEE SCOUT
published, issued, and entered as second class mail in the City of Murphy,
in said County and State; that ... he 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 Cherokee Scout on
the following dates:
February 23, 2000
and that the said newspaper in which such notice, paper, document, or
legal advertisement was published was, at the time of each and every
publication, a newspaper meeting all of the requirements andqualifica-
tions 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
9th
aof March 2000
v
(signaturrson making affidavit)
Sworn to and subscribed before me this
of March
1
My Commission expires:
(SEAL)
9th
20QQ
Notary Public
7 i 5- 7 viir'
day

AFFIDAVIT OF PUBLICATION
BUNCOMBE COUNTY
SS.
NORTH CAROLINA
PUBLICNOTICE
STATE OF
NORTH CAROLINA
ENVIRONMENTAL
MANAGEMENT
NPDES UNIT
1617MAILSERVICE CENTER
R NOT FICAT 0 27OF17
INTENT
DESTO SUE
WASTEWATER PERMIT
On the basis of thorough
staff review and applica-
tion of NC General Statute
143.21, Public low 72.500
and other lawful standards
and reguldtions, the North
Carolina Environmental
Management Commission
proposes to issue a Na-
tional Pollutant Discharge
Elimination System
(NPDES) wastewater dis-
charge permit to the per-
son(s) listed on the at-
tached pages effective 45
days from the publish dote
I of this notice.
Written comments regard-
ing the proposed permit
will be accepted until 30
days after the publish date
of this notice. All com-
ments received prior to
that date are considered in
the final determinations
regarding the proposed
permit. The Director of
the NC Division of Water
'Quality may decide to hold
a public meeting for the
Proposed permit should the
Division receive a signifi-
cant degree of public in- .
terest.
Copies of the draft permit
and other supporting in-
formation on file used to
determine conditions Ares-
• ent in the draft permit ore
available upon request and
Payment of the costs of re-
production. Mail com-
ments and/or requests for
information to the NC Di-
vision of Water Quality at
the above addre,s or call
(919) Christie 831 .xtenston
538. Please in( ide the
NPDES permit number
(attached) in any commu-
nication. Interested per-
sons may also visit the Di-
vision of Water Quality at
512 N. Salisbury Street,
Raleigh, NC 27604-1148 be-
tween the hours of 8:00
a.m. and 5:00 p.m. to re -
Iview information on file.
NPDES Permit Number
WNWTP, P.0c0940, BoxT13ow0,
Murphy, NC 28906 has ap-
plied for a modification for
a facility located in Chero-
kee County discharging
treated wastewater into
Hiwassee River in the Hi-
wassee River Basin, Cur-
rently no parameters are
water quality limited. This
discharge may affect fu-
ture allocations in this por-
tion of the receiving
stream.
February 18, 2000
(1516}
r
flag
CD
C\1
LI7)
CNJ
w
Before the undersigned, a Notary Public of said
County and State, duly commissioned, qualified and
authorized by law to administer oaths, personally
appeared Lynn Miele, who, being first duly sworn,
deposes and says: that he (she) is the Legal Billing
Clerk of TheAsheville Citizen -Times Company,
engaged in publication of a newspaper known as
The Asheville Citizen -Times, published, issued,
and entered as second class mail in the City of
Asheville, in said County and State; that he (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 Asheville Citizen -
Times on the following dates: February 18,
2000And that the said newspaper in which said
notice, paper, document or legal advertisement were
published were, at the time of each and every
publication, a newspaper meeting all of the
requirements and qualifications of Section 1-597 of
the General Statues of North Carolina and was a
qualified newspaper within the meaning of Section
1-597 of the General Statues of North Carolina.
This 21 st day of February
(Si a of person making aL f d t)
Sworn to and subscribed before me the 21st day of
February
j
is ��
Publ
)
My Commission expires the 16th day of August
2004.

DENR/DWQ
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
NPDES No. NC0020940
Facility Information
Applicant/Facility Name:
Town of Murphy
Applicant Address:
5 Wofford Street, Murphy, NC 28906
Facility Address:
Payne Street, Murphy, NC
Permitted Flow
0.925 and 1.4 MGD
Type of Waste:
99% Domestic, 1% Industrial
Facility/Permit Status:
Modification (expansion)
County:
Cherokee
Miscellaneous
Receiving Stream:
Hiwassee River
Regional Office:
Asheville
Stream Classification:
C
USGS Topo Quad:
Murphy
303(d) Listed?:
No
Permit Writer:
Mark McIntire
Subbasin:
04-05-02
Date:
February 10, 2000
Drainage Area (mi2):
956
Summer 7Q10 (cis)
96.9��
Winter 7Q10 (cfs):
113
Average Flow (cfs):
245
IWC (%) 0.925/1.4 MGD:
1.5/1.7
Primary SIC Code:
4951
SUMMARY OF FACILITY AND WASTELOAD ALLOCATION
The Town of Murphy has requested expansion of their municipal wastewater treatment facility from 0.925
MGD to 1.4 MGD. The facility previously requested speculative effluent limitations in 1998. Speculative
limits were issued on July 20, 1998. Furthermore, NPDES Unit staff reviewed a 201 Facilities Plan with an
Environmental Assessment for the expansion. Continued discharge to the Hiwassee River was determined to
be the most cost-effective of all feasible alternatives. The attached draft permit modification has been prepared
in accordance with the speculative effluent limitations prepared in 1998. The Town will be notified that upon
renewal and expansion, effluent limitations for toxicants will be reviewed and added or removed as necessary.
TOXICITY TESTING:
Current Requirement:
Recommended Requirement:
The facility failed two chronic
events.
Chronic (Ceriodaphnia) @ 1.5% at 0.925 MGD
Chronic (Ceriodaphnia) @ 1.7% at 1.4 MGD
toxicity tests in 1997 with passes in the two years prior to and following those
COMPLIANCE SUMMARY:
A review of the facility's self -monitoring data indicates no known compliance problems. The plant appears to
be well operated.
INSTREAM MONITORING:
No instream monitoring is required or proposed.
PROPOSED SCHEDULE FOR PERMIT ISSUANCE:
Draft Permit to Public Notice: February 23, 2000
Permit Scheduled to Issue: April 10, 2000
Town o6 1-lurphy Fact Sheet
NP1)i?S.\l diti(Rtion
l'a};e i

STATE CONTACT:
If you have any questions on any of the above information or on the attached permit, please contact Mark
McIntire at [phone] ext. 553.
REGIONAL OFFICE COMMENT:
0 GontiNt.Q'
r �,r �� r c o�rliS c.. �v 1
NAME: DATE:
Town of Murphy Fact Sheet
Ni'I.)i 5 :lhidii'ii,.uion
Page

Mc Gill
ASSOCIATES
January 7, 2000
Mr. David A. Goodrich, P.E.
North Carolina Department of Environment
and Natural Resources
Division of Water Quality / NPDES Unit
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
g
i1 JAN 1
RE: NPDES Permit For Increased Capacity
Town of Murphy WWTP
Cherokee County, North Carolina
Dear Mr. Goo WATER QUA!.ITY
tourr
On behalf of the Town of Murphy, please find enclosed one (1) original and two (2)
copies of the Application for Permit to Discharge Wastewater and the required $215 check for
a major modification for the above referenced facility. The plant currently holds Permit No.
NC0020940 to discharge 0.925 MGD into the Hiwassee River. The purpose of this application
is for the increase in capacity of the plant to 1.4 MGD.
Should you have any questions regarding this application, please do not hesitate to
contact us. We look forward to your timely review and approval.
Sincerely,
McGILL ASSOCIATES, P.A.
4.api
MICHAEL S. APKE, E.I.T.
Enclosures
cc: William N. Hughes
Ann Payne
Projects/1997/97196.01/letters/dg07jan0.doc
Engineering • Planning • Finance
McGill Associates. P.A. • P.O. Box 2259, Asheville, NC 28802 • 55 Broad Street, Asheville, NC 28801
828-252-0575 • FAX [phone]

Potential Facility Changes
Town of Murphy Wastewater Treatment Plant
NPDES Permit Number NC0020940
The Town of Murphy, North Carolina currently owns and operates a wastewater
treatment facility with a design capacity of 0.925 million gallons per day. The proposed project
involves all work associated with increasing the design capacity of the treatment plant to 1.4
million gallons per day (MGD) of wastewater.
As part of the project, the Town's existing Number One pump station will be upgraded.
Pumps will be replaced with larger pumps to meet State criteria for an influent pump station for a
1.4 MGD treatment facility. The upgrade will also include the construction of approximately
2,500 lineal feet of 12-inch force main to replace the existing 8-inch influent force main to the
plant. 'The new 12-inch force main will transfer the plant influent into a newly constructed
concrete channel with a new mechanical bar screen and aerated grit removal system.
After the screenings and grit have been removed, the wastewater will undergo activated
sludge treatment using two new sequencing batch reactors (SBRs). This will involve the
construction of two (2) square concrete tanks. Aeration and mixing will be provided in the SBR
tanks by floating surface aerators and mixers. All flow entering the plant will be treated by one
of the two SBR units, therefore the existing AeroMod package treatment plant will be abandoned
as part of this project. The treated effluent from the two SBRs will flow to the existing
rectangular clarifier tank, which will be converted into a post -equalization basin. The flow from
the post -equalization basin will then go to the existing chlorine contact basin, which will be
expanded as part of this project to allow for the increase in flow capacity at the plant.
Dechlorination will continue to be provided at the end of the chlorine contact basin by feeding
sulfur dioxide. The existing 8-inch discharge piping to the Hiwassee River will be upgraded to
an 18-inch pipe to allow adequate capacity for the discharge of the flow into the river. The
location of the discharge into the river will remain the same as the existing discharge location.
Sludge collected by the SBRs will be pumped from the SBR tanks to the existing sludge
digester. In addition, the existing circular aeration basin will be converted to a sludge digester to
allow for adequate storage of sludge for the 1.4 MGD facility. Sludge will be dewatered by a
new sludge dewatering facility, and the existing sludge drying beds will be removed. The sludge
dewatering facility will consist of a 1.0 meter belt filter press with a polymer feed system,
located in a new sludge dewatering building. Once the sludge is dewatered, the Class B sludge
will continue to be transferred to the Cherokee County landfill for disposal.
As requested, a schematic of the proposed wastewater flow after the plant expansion to
1.4 MGD is attached for reference.
1

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NPDES PERMIT NUMBER NC0020940
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DIVISION OF WATER QUALITY
Point Source Branch
NPDES Unit
December 31, 1998
MEMORANDUM
TO: Gail Putnam
THRU: Dave Goodric
FROM: Jacquelyn M. Nowell A
�
SUBJECT: Review of Town of Murphy WWTP 201 Facilities Plan and
Environmental Assessment
Project # 959
Permit No. NC0020940
Cherokee County
The NPDES Permit Unit has reviewed the subject document and we have no
significant comments on the facility's plan. The Division of Water Quality provided
speculative limits for the proposed expansion to 1.4 MGD to the Town of Murphy in July
1998. The water quality modeling evaluation indicated that secondary treatment of
Murphy's municipal wastewater would provide adequate treatment for discharge to the
Hiwassee River. The evaluation also provided information concerning tentative effluent
limitations for dissolved oxygen, fecal coliform, total residual chlorine, chronic toxicity
and metals. The plan also clearly addresses all discharge alternatives, and clearly
delineates the option chosen for the expansion of the existing facility.
Please contact me if any additional info is needed.
cc: Central Files
NPDES Permit File

8-INCH FORCE
MAIN FROM No.1
PUMP STA110N
0.925 MGD
(EXISTING
DESIGN FLOW)
T.W. 1558t
LEV. 1554*
BAR SCREEN
AND AERATED
GRIT CHAMBER
CLASS B SLUDGE
TO LANDFILL
T.W. 1554t
0.775 MGD
0.150 MGD
ELEV. 1550t
SPUTTER
BOX
ELEV.
rj 1557t
SLUDGE DRYING BEDS
22,300 SQUARE FEET
WSL ELEV.
1550t
ELEV.
1535t
0.775 MGD
AERATION BASIN
VOLUME 267.000 GALLONS
RETENTION TIME 8.26 HOURS
MAX. WSL ELEV.
1548.4t
LWL 1540.4
ELEV. 1539.4k
0.775 MGD
SECONDARY CLARIFIERS
VOLUME 176.000 GALLONS
RETENTION TIME 5.45 HOURS
SLUDGE
PUMP
STATION I
3.550 GPD
SLUDGE 0
2% SOUDS
0,6
ELEV.
MAX.1 WSL
ELEV. 1535.5t
0.150 MGD
AERO-MOD PACKAGE TREATMENT
RANT WITH AERATION.
CLARIFIERS do DIGESTER
RETENTION TIME 24 HOURS
WSL ELEV.
1560.5±
1147 75t
ii y .u2'.' fir' • p7.rh . 1/
AEROBIC DIGESTER
THICKENS SLUDGE TO 2%
14.200 GPD SLUDGE 0 1/2% SOLIDS
740 DRY Ibs./DAY
EXISTING WASTEWATER TREATMENT FLOW DIAGRAM
MAX. WSL ELEV.
1540.31
15362
0.925 MGD
CHLORINE
CONTACT BASIN
VOLUME 21,000 GALLONS
RETENTION TIME 33 MINUTES
DISCHARGE
IIMEEN cn J
IMMEI
W d
cm RI
z
U a,
oz
dw
RTH
SHEET

NEW
16" FORCE MAIN
FROM NUMBER 1
PUMP STATION
1.4 MGD
(PROPOSED
DESIGN FLOW)
T.W. 1566t
LEV_ 1580±
BAR SCREEN
AND AERATED
GRIT CHAMBER
EXISTING DIGESTOR
THICKENS SLUDGE TO 2X
=5370 GPD OF SLUDGE
VOLUME 127.900 GAL
DETENTION TIME 24 DAYS
AERATED SLUDGE
HOLDING TANK
(CONVERTED AERATION BASIN)
r VOLUME 247.400 GAL
USE FOR ADDITIONAL
SLUDGE HOLDING WHEN
NECESSARY
tor
0
T.W. 1 582 t
ELEV
1574
t
0.700 MGD
0.700 MGD
ELEV.
15521
WSL ELEV.
1572t
10
0.700 MGD
SPUTTER
BOX
SBR TANK No.1
LOW WATER VOLUME 439.405 GAL
RETENTION TIME 7.5 HOURS
7
ELEV.
1552±
WSL ELEV.
1572±
050
SBR TANK No.2
LOW WATER VOLUME 439,405 GAL
RETENTION TIME 7.5 HOURS
0.700 MGD
SLUDGE=21.480 GPD 0 1/2X SOUDS
1.120 DRY Ibs./DAY
MAX. WSL ELEV.
j 1548 4t
um. 1540.4
EL.EV. 1534.43
CLARIFIER CONVERTED TO
POST EQUALIZATION
VOLUME 176,000 GAL
RETENTION TIME 3 HOURS
NOTE:
BASIN RETENTION TIMES ARE BASED ON
AVERAGE DAILY DESIGN FLOW OF 1.4 MGD
FOR LIQUID TRAIN, AND FLOWS SHOWN IN
SCHEMA11C FOR SOLIDS TRAIN.
1.4 MGD
5.370 GPD SLUDGE
2X SOUDS
NORMALLY
CLOSED
VALVE
MAX. WSL ELEV.
1540.3t
ELFV.
1538.2
rid
EXPANDED CHLORINE
CONTACT BASIN
VOLUME 30.000 GAL
RETENTION TIME 30 MINUTES
low
Ow Ell
SLUDGE PUMPS
TO FILTER PRESS
BELT FILTER PRESS
(50 GPM CAPACITY)
1.120 DRY Ibs./DAY 0
APPROXIMATELY 16% SOUDS
CLASS B SLUDGE
TO LANDFILL
PROPOSED WASTEWATER TREATMENT FLOW DIAGRAM
DISCHARGE
111111..
1.4 MGD
.
mom
SHEET
z