NC0021181_Other_19910228

MPDES DOCYMEMT SCAMMIM& COVER SHEET
NPDES Permit: NC0021181
Belmont WWTP
Document Type: Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Engineering Alternatives Analysis
201 Facilities Plan
Instream Assessment (6713)
'Environmental Assessment (E4
Permit
History
Document Date: February 2891991
This document is printea on reuse paper-igazore any
coaterit on the reverse side

FINDING OF NO SIGNIFICANT IMPACT
AND ENVIRONMENTAL ASSESSMENT
UPGRADE THE EXISTING TREATNMIT PLANT
AND RE,_OCATE THE; EFFLUENT OUTFALL
CITY OF BELMONT
RESPONSIBLE AGENCY: NORTH CAROLINA DEPARTMENT OF ENVIRONMENT,
HEALTH AND NATURAL RESOURCES
CONTACT- JOHN R. BLOWE, CHIEF
CONSTRUCTION GRANTS AND LOANS SECTION
DIVISION OF ENVIRON,lENTAL MANAGE=
512 N. SALISBURY STREET
POST OFFICE BOX 27687
RALEIGH, NORTH CAROLINA 27611-7687
(919) 733-6900
FEBRUARY 28, 1991
t•
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APR R P 1991
FEGFriVf�dZ SL'Ppokf Bh�NN�ii
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FINDING OF NO SIGNIFICANT IMPACT (FNSI)
UPGRADE THE EXISTING TREATMENT PLANT
AND RELOCATE THE EFFLUENT OUTFALL
Title VI of the amended Clean Rater Act requires the review and approval of
environmental information prior to the construction of publicly-awned
wastewater treatment facilities financed by the State Revolving Fund (SRF) .
The proposed project has been evaluated for compliance with the North
Carolina Environmental Policy Act and determined to be a major agency action
which will affect the enviroimient.
Project Applicant: City of Belmont, North Carolina
Project Number: CS370702-04
Project Description: The proposed project consists of upgrading the
existing 5.0 mgd treatment plant and adding sludge
handling facilities. The effluent outfall will be
relocated from a cove of Lake Wylie to the main
channel of the Catawba River.
Total Project Cost: $2,681,700
Revolving Loan Amount: $2,681,700
The review process did not indicate significant adverse environmental
impacts would result from implementing the proposed project, and an
environmental impact statement (EIS) will not be required. The decision was
based on information in the facilities plan, a public hearing document, and
reviews by governmental agencies. An environmental assessment supporting
This action is attached. This FNSI completes the environmental review
record, which is available for inspection at the State Clearinghouse.
No administrative action will be taken on the proposed project for at least
thirty days after notification of the FNSI is published in the North
Carolina Environmental Bulletin.
Sincerely, '
George T. Everett, Director
Division of Environmental Management

Y
ENVIRONMENTAL ASSESSMENT
A. Proposed Facilities and Actions
Figure 1 identifies the location of the wastewater treatment plant. Figure
2 shows the location of the selected route for the proposed effluent outfall.
Treatment Facilities. The proposed project consists of upgrading the
existing 5 mgd wastewater treatment plant. Major improvements will include
a mechanical bar screen, grit removal equipment, aerators, RAS and V:AS
pumps, a scum pump, and a chlorination unit. The existing clarifiers will
be rehabilitated. Sludge handling facilities to be provided will consist of
digesters, blowers, a diffuser, sludge pumps, aerators, a storage lagoon,
and an equipment shelter. The sludge will be land applied by a private
contractor on a permitted site. Approximately 1,400 linear feet of 30-inch
PVC line will be required to relocate the effluent outfall from an unnamed
cove of Lake Wylie to the Catawba River.
B. Existing Environment
Topography and Soils. The City of Belmont is located in eastern Gaston
County. The topography is gently sloping to very steep with the lowest
elevations converging near Lake Wylie. The primary soil association is
Cecil-Hiwassee-Pacolet. These soils are generally well drained. The
association has moderately permeable clay subsoils with predominantly sandy
surface soils.
Surface Waters. The major water body is Lake Wylie, an impoundment of the
Catawba River. The lake has a shoreline of over 325 miles and a surface
area of 12,455 acres. The city's treatment plant discharges effluent into
an unnamed cove of Lake Wylie. The Division of Environmental Management has
rated the lake as "threatened" for its WS-II classification. The lake is
chemically/physically impaired due to sediment, bacteria, and toxics.
Water Supply. The City of Belmont receives its drinking water from the
Belmont Converting Company, a privately owned facility with a raw water
intake one mile above the treatment plant's discharge point.
C. Existing Wastewater Facilities
The City of Belmont operates a 5.0 mgd extended aeration treatment plant.
The facility was constructed in 1968 with an effluent discharge to an
unnamed cove of Lake Wylie. The effluent discharge from the plant provides
a majority of the flow in the cove except during heavy rainfalls. This
situation results in very little dilution to the effluent. Belmont has six
commercial/industrial companies that discharge pretreated wastewater into

the city's collection system. All of the residents within the City of
Belmont, except persons living in recently annexed areas, are provided
central sewer services. The sewerage system has been evaluated, and
infiltration/inflow are non-excessive.
D. Need for Proposed Facilities and Actions
The Division of Environmental Management (DEM) evaluated Belmont's
wastewater treatment plant and determined that the effluent was not being
treated adequately to protect aquatic life in the cove. Accordingly, DEM
issued a NPDES permit in 1988 which required more stringent effluent limits,
if the discharge remained at the existing location. The effluent limits for
continuing the discharge in the cove are BODS = 1.5 mg/l, TSS = 30 mg/l,
D.O. = 6 mg/1, and NH -N = 0.2 mg/1. Effluent limits for extending the
outfall to the main cAannel of the Catawba River are BOD = 30 mg/l and
TSS = 30 mg/l. Both discharge locations require monitoring for metals and
testing for chronic toxicity. Although effluent limits for both discharge
points should protect water quality, the City of Belmont has chosen to
relocate the effluent outfall to the Catawba River. Additionally, the city
is presently operating the treatment plant under a Special Order by Consent
(SOC) and treatment plant improvements are needed. The upgrade is also
necessary due to the plant's age and poor equipment condition. Upgrading
the plant will assist the city in meeting the NPDES requirements and allow
for orderly growth and development.
The existing population for the City of Belmont is 9,600 and the twenty-year
projected population is 11,600. The existing plant has a permitted capacity
of 5.0 mgd and additional hydraulic capacity is not necessary at this time
to serve current and future needs.
E. Alternatives Analysis
The original Gaston County 201 facilities plan was prepared in 1979, and
Belmont was one of the participating conmunities. The city has made minor
improvements to the plant and initiated an industrial pretreatment program
in an effort to comply with the NPDES permit effluent limits. The
"no-action" alternative will not result in achieving the permitted effluent
limits. "No-action" would result in the continued discharge of an effluent
to a cove in which the assimilative capacity is restricted due to a limited
flow. A land application system was considered and rejected due to the high
cost to treat 5.0 mgd. The most cost-effective alternative is for the City
of Belmont to upgrade the existing plant and relocate the effluent outfall
to the Catawba River. It is the selected alternative.
-2-

F. Environmental Consequences, Mitigative Measures
The proposed upgrade will take place at the existing treatment plant site.
The land has been previously disturbed and no significant adverse
environmental impacts are anticipated. The effluent outfall will be placed
below grade along the shoreline and under the lake bottom. The effluent
outfall will be constructed such that the top of the pipe is not exposed at
the maximum low water level. This will insure that recreational activities
will not be adversely impacted. The proposed, effluent outfall right-of-way
consists of undeveloped river bank vegetation with some deciduous trees.
The primary route is along an existing dirt road and some trees will be
removed. The Department of Cultural Resources evaluated the proposed
project and determined that there should be no adverse impact to
architectural, historic, or archaeological resources. The U. S. Fish and
Wildlife Service indicated that there are no federally endangered or
threatened species within the project area. DEM's Air Quality Section has
stated that the proposed action will not likely contravene the requirements
of the State Implementation Plan (SIP) . The Division of Environmental
Health has requested that steps be taken to prevent contamination of the
watershed and stream by oil or other harmful substances. The Wildlife
Resources Commission has requested that stringent erosion and sedimentation
controls be utilized to reduce impacts to Lake Wylie/Catawba River. Ttie
Division of Land Resources has reviewed the erosion and sedimentation
control plan and has found it to be satisfactory. Erosion control measures
will be monitored during construction to reduce runoff to Lake Wvlie/Catawba
River. All of the erosion concerns of the Air Quality Section, the Division
of Environmental Health, and the Wildlife Resource Commission have been
considered and properly addressed. The project will be constructed and
operated in accordance with appropriate guidelines and required
regulations. The U. S. Army Corps of Engineers has determined that the
project is authorized by a nationwide permit, provided that construction is
in accordance with the general permit conditions.
G. Public Participation, Sources Consulted
A public hearing was held January 7, 1991 on the amended Belmont portion of
the Gaston County 201 Facilities Plan. The hearing covered the problems of
the existing facilities, the proposed alternative for solving the problem,
and the costs to implement the selected plan. No opposition to the proposed
project has been expressed. The average user currently pays approximately
$2.22 per month for municipal sewer services, and the proposed project will
result in an increase to approximately $2.82 per month.
-3-

y.
Sources consulted about this project for information or concurrence included:
a. City of Belm. nt
b. North Carolina Departnent of Fnvironment, Health,
and Natural Resources
-water Quality Planning Branch
-wildlife Resources Commission
-Parks and Recreation
-Groundwater Section
-Air Quality Section
-Division of Health Services
-Division of Planning and Assessment
C. North Carolina Department of Cultural Resources
d. North Carolina State Clearinghouse
e. U.S. Army Corps of Engineers
f. U.S. Fish and wildlife Service
g. Centralina Council of Governments
-4-

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LEGEND
CITY OF BELMONT
n , J`�
---- CURRENT CITY LIMITS ' � � 201 FACILITIES PLAN AMENDMENT
----- SERVICE AREA BOUNDARY
WTP WATER TREATMENT PLANT
VICINITY & SERVICE AREA
MAP
WWTP WASTEWATER TREATMENT PLANT
A WATER PLANT INTAKE
CURRENT WWTP DISCHARGE POINT P Sk 3 FIGURE 1

Cq
pROp '�Tq
\ � R
BELMONT
WWTP
ti ALTERNATE A ALIGNMENT
- - - - - - - - - - - ---
ALTERNATE 0 ALIGNMENT
EXISTING DISCHARGE POINT f�
O - - '\4C.
M�oy
e
O, CITY OF BELMONT
201 FACILITIES PLAN AMENDMENT
ALTERNATIVE OUTFALL LINE
RELOCATION PLAN
ALTERNATIVE A IS THE SELECTED ROUTE '® FIGURE 2

PRETREATMENT HEADWORKS REVIEW
-----------------------------
Discharger : City of Belmont WWTP 01 /26/89
NPDES Permit No . : NC0021181
Subbasin: 030834
Receiving stream: Catawba River
Stream Class: WSIII-B
7Q10: 95.000 cfs
QA: cfs
Design flow: 5.000 mgd
Actual flow: 1 . 97 mgd
Percent Industrial : 45. 00
IWC: 7 . 5
Proposed
Existing Effluent Proposed Effluent Maximum Backgroun
Pollutant Standard/AL Limit Standard/AL Limit Observed ' Conc .
(mg/ 1 ) (mg/ 1 ) ( mg/1 ) (mg/ 1 ) (mg/ 1 ) (mg/ 1 )
--------- ----------- ------- --------- --------- -------- --------
Cadmium S 0.002 0.0265 0 .002 0.0265 0 . 000
Chromium S 0.05 0. 6629 0.05 0.6629 0.000
Copper AL 0.015 Monitor 0 . 015 Monitor 0 .000
Nickel S 0 .025 0.3315 0. 025 0. 3315 0. 120 0. 000
Lead S 0.025 0. 3315 0. 003 0.0398 0.000
Zinc AL 0.05 Monitor 0.05 Monitor 0.000
Cyanide S 0.005 0. 0663 0. 005 0.0663 0.060 0 .000
Mercury S 0.0002 0.0027 0. 000012 0.0002 0. 000
Silver AL 0. 01 Monitor 0.00006 Monitor 0.000

NPDFS PRETRFATMFNT INFURMATICN REQUEST F ,01
(�
,FACILITY NAME: I NPDFS NO. NC00
REQUE54'FR: DATE: _/ /_ REGION:
,
PERAIT CONDITIONS COVERING PRFTRFATMFM
This facility has no SIUs and should not have pretreatment language.
This ' facil-ity should and/or is developing a pretreatment program.
Please include the following conditions:
; . . Program Development
Phase I due
i Phase II due
Additional Conditions ;
(attached) ,
This facility is currently implementing a pretreatment program.
Please include the following conditions: i
i. , Program Implementation ;
Additional Conditions ;
(attached) ,
,
. SIGNIFICANT INDUSTRIAL USE - (SIUs) CONTRIBUTIONS
SIU FIC(4 - TOTAL: '
14M
- COMFYGITION: TEXTILE:
M;D
METAL FINISHING: MSD
MUM: F1M
M
jM
i
i
,
HEAIMORKS REVIEW
,
PARAMETEF2 is sIF s Tnoub Y LOAD IN LBS/AAY : i
' iALLOWBLE DOMEMC ACTUALCr
i
,
o. 19 S3. SN_ 0 , 03:� fb
N0, a3 al , N7— 3-01 ;_ g2
O109 32
PbZn
.
S,�y ' 31
Phenol
Other 4 O� a3 b
O. 0;.i
RE) EIVED: _/_/_ REVIIIQED BY: RETURNED: _/_/

L;m( vileKt5+1'I
PRETREATMENT HEADWORKS REVIEW
-----------------------------
Discharger : City of Belmont 01 /24/89
Receiving stream: Catawba River
Stream Class : WSIII-B
7910 : 95.000 cfs
Design flow: 5. 000 mgd
Actual flow: 1 .97 mgd
Percent industrial : 45.00
IWC : 7.5
Actual Actual
Allowable Domestic Industrial
Pollutant Standard/AL Removal Load Load Load
(mg/ 1 ) Eff. ( lbs/day) ( lbs/day ) ( lbs/day )
--------- ----------- ------- --------- --------- ---------
Cadmium 0.002 S 92% 13 . 21 0. 110 6.600 P
Chromium 0.05 S 76% 110 . 12 0. 190 53.540 P
Copper 0.015 AL 82% 44 .05 0.230 21 . 410 P
Nickel 0.025 S 32% 19 .43 0.080 9.460 P
Lead 0.025 S 81% 69 .55 0. 180 3 .750 P
Zinc 0.05 AL 77% 114 .91 0. 660 37.490 P
Cyanide 0.005 S 59% 6.45 0 . 150 3.040 P
Mercury 0.0002 S 86% 0 .76 0. 001 0. 360 P
Silver 0 .01 AL 94% 88. 10 0. 020 1 .070 P
Total Predicted Allowable
Influent Background Effluent Effluent
Load Reserve Conc Conc Conc
( lbs/day) ( lbs/day ) (mg/ 1 ) (mg/ 1 ) (mg/1 )
------------ --------- --------- -------- --------
Cadmium 6.71 6 .50 0 OIL 0 .0265
Chromium 53 .73 56 .39 0 5VMP=ftL 0. 6629
Copper 21 .64 22.41 0 0 .2369 M 0. 1999
Nickel 9 .54 9.89 O S ' rL 0.3315
Lead 3.93 65.62 O 0.0454 L 0.3315
Zinc 38 . 14 76.77 O 0. 5336 M 0.6629
Cyanide 3. 19 3.26 0 OV19ZOEWL 0.0663
Mercury 0. 36 0 . 39 0 4=ZEZOL 0.0027
Silver 1 .09 87.01 0 0.0040 M 0 . 1326

PRETREATMENT HEADWORKS REVIEW
-----------------------------
Discharger : City of Belmont 01 /24/B9
Receiving stream : Catawba River
Stream Class: WSIII-8
7010 : 95.000 cfs
Design flow: 5.000 mgd
Actual flow: 1 .97 mgd
Percent industrial : 45. 00
IWC: 7 . 5
Actual Actual
Allowable Domestic Industrial
Pollutant Standard/AL Removal Load Load Load
-- (mg/ 1 )--- -Eff.-- ( lbs/day ) ( lbs/day ) ( lbs/day)
--------- --------- --------- ---------
Cadmium 0.002 S 92% 13.21 0 . 110 6 . 600 P
Chromium 0 .05 S 76% 110. 12 0. 190 53 .540 P
Copper 0. 015 AL 82% 44.05 0 .230 21 . 410 P
Nickel 0.025 S 32% 19.43 0.080 9 .460 P
Lead 0 . 003 S 81% 8.35 0. 1BO 3.750 P
Zinc 0.05 AL 77% 114 .91 0 . 660 37 . 4BO P
Cyanide 0. 005 S 59% 6.45 0. 150 3 . 040 P
Mercury 0.000012 S 86% 0.05 0 .001 0. 360 P
Silver 0.00006 AL 94% 0.53 0.020 1 .070 P
Total Predicted Allowable
Influent Background Effluent Effluent
Load Reserve Conc Conc Corr_
( lbs/day) ( lbs/day) (mg/ 1 ) (mg/ 1 ) (mg/1 )
Cadmium 6 .71 6.50 0 0 L 0.0265
Chromium 53.73 56.39 O L 0.6629
Copper 21 .64 22.41 0 0.2369 M 0. 1999
Nickel 9.54 9.89 0 O -L 0. 3315
Lead 3.93 4.42 0 L 0 . 0398
Zinc 38. 14 76 .77 0 0.5336 M 0. 6629
Cyanide 3. 19 3.26 0 L 0. 0663
Mercury 0.36 -0. 32 0 O - L 0 .0002
Silver 1 .09 -0.56 0 0.0040 M 0.000B

01/24/S'9
11:59:41
5TORET RETRIEVAL DATE 89/01/24 PE&RET PAGE: i
C3500000 C18090 02142608
35 17 53.0 081 00 14.0 1
CATAWBA RIVER 2 NC HWY 27 MR THRIFT, NC
37119 NORTH CAROLINA MECKLENBURG
SDUTHEAST 030C37
CATAWBA /TYPA/AMBNT/LAKE
21NC0IWQ HO 03050101012 0000.490 OFF
0001 FEET DEPTH
SMK 01027 00720 01034 01042 01051 01067 01077 71900
DATE TIME OR CADMIUM CYANIDE CHROMIUM COPPER LEAD NICKEL SILVER MERCURY
FROM OF DEPTH CD,TOT CN TOT CR,TGT CU,TOi PB,TOT NI,TOTAL AG,TOT HG,TGTAL
TO DAY MEDIUM (FT) UG/L MG/L UG/L UG/L 061L 11G(L UG/L UG/L
83102!02 1130 WATER 0 20K SOK 20K 100K 100K .2K
33/04/27 1110 WATER 0 20K 50K 20K I00K 100K .2K
33/00/24 1600 WATER 0 20K 50K 20K 100K 100K 2f:
33/08/12 1030 WATER 0 20K 5OK 20K Ilox IOOK .2K
63/11/14 1300 WATER 0 20K 50K 20K 100K 100K .21,
84/02/29 i004 WATER 0 20K SDK 20K 100K IHOK .2K
84/05/15 1235 WATER 0 2UK. 50K 20K 106K 100K .2K
24/081'c3 12115 WATER 0 20K 508: 20K IOOK 104K .2K.
84/11/15 1155 WATER 0 2OK SOY. 20K IOAK 100K .2k,
95/02/27 ION WATER 0 20K 50K 20K 100K 10OK .21,
85/05/30 1030 WATER 0 20K 50K 20K 100K looK .2K
95/08/28 1020 WATER 0.2"2779? 20K 50K 20K 106K 190 .2
5/11/19 1020 WATER 0.32799? 20K 50K 20K 1o0K IOQK .211,
'nio2120 0955 WATER 0.327999 2K 25k: lOK i0K 101: .2K
86/03/24 1005 WATER 0.327999 2K 10K 10K
96/04/23 1000 WATER 0.327999 2K 10K 10K
E6105l28 0115 WATER 0.327999 2k: IQK 10K
96/05/29 1115 WATER 0.327999 25K 11 .2K
86/06/20 1020 WATER 0.327499 2K lox l0K
86/07/29 1040 WATER 0.22799-1 10K 50K 50e:
96/08/25 1500 WATER 0.32779? 2K 25K 10K 1UK !OK .2K
86/09/24 1100 WATER 0.32795? 2K 1UK lox
96/10/30 1000 WATER 0.32799? 2K 10K iv:
96/li/19 1020 WATER 0.i'c79c? IUK 25K 30 50K 50K .EK
37/02/17 1445 WATER 0.32799? 10K 03VI 10K 50K 50K .3K
87105/26 1040 WATER 0.327999 10K 25K COK 50K 50K .2K
97/06/23 1000 WATER v.327999 .2K
87/O8/26 1520 WATER 0.3279?? 181 25K 10K 50K 50K .2K
97111/i6 1430 WATER 0.321999 ion 25K 10KSOK SOK 2K
08102/17 1300 WATER 0.327?99 3K 25K 10K I,iK 50K 3K
38/05/17 loll WATER 6.327999 2K 25K 10K 10K 5UK .2Y,
88/11l16 11145 WATER 0,327999 2K 25K lox: 10K 50K 2K
THAT'S ALL FOLKS
9TORET RETRIEVAL DATE B9/01124
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November 3 , 1988
Re: Belmont WWTP Outfall Discharge Point
Project No. : 30-016-201
Mr. Thurman Horne
State of North Carolina — ,;.,...`," - ' `%'
Department of Natural Resources &
Community Development
Mooresville Regional Office
P.O. Box 950
Mooresville, NC 28115
Dear Mr. Horne:
;t.
The City of Belmont, through its negotiations with the property owner
adjacent to the Wastewater Treatment Plant, has relocated the proposed
discharge point for the plant effluent to approximately 250 feet north of
the original proposed location. This change was required to accommodate the
requirements of the adjacent owner, from which an easement is being
obtained. The attached exhibit illustrates the proposed location.
Please review this matter and advise us as to the impact on the City's
current NPDES for the plant. If you need additional information, feel free
to call .
Very truly yours,
Gerald E. Hatton, P.E.
TARANTO, STANTON & TAGGE
Consulting Engineers
cc: Mr. Ken York
City of Belmont
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TARANTO, STANTON &TAGGE
Consulting Engineers `a,P
2020 Euclid Avenue -AP
Charlotte, North Carolina 28203 [phone] y

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EXHIBIT 1
—3—