NC0085812_Permit Issuance_20020318

© 7A
NCDENR
Mr. Jon C. Dyer, Director
Union County Public Works Department
400 North Church Street
Monroe, North Carolina 28112-4804
Dear Mr. Dyer:
Michael F. Easley
Governor
William G. Ross, Jr., Secretary
North Carolina Department of Environment and Natural Resources
Gregory J. Thorpe, Ph.D., Acting Director
Division of Water Quality
March 18, 2002
Subject: Issuance of NPDES Permit NC0085812
Grassy Branch WWTP
Union County
Division personnel have reviewed and approved your application for renewal of the subject permit. Accordingly, we are
forwarding the attached NPDES discharge 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 May 9, 1994 (or as subsequently amended.)
The following modifications are included in the final permit:
• In concurrence with your request, the Division agrees that influent samples for BODS and Total Suspended Solids
(TSS) may be grab samples until August 31, 2002. Effective September 1, 2002, both influent and effluent samples
for BODS and TSS most be composite.
• The monthly average effluent BODS and TSS concentrations shall not exceed 15% of the respective influent value.
There must be at least an 85% removal rate (per the secondary treatment requirement per 40 CFR Part 133).
• Daily maximum limits for BODS and TSS have been changed to weekly average limits. -
• Dechlorination has been added as a backup treatment component.
• A special condition has been added noting the provisional waiver of instream monitoring as long as Grassy Branch
W WIP remains a member of the Yadkin River Basin Association.
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 foam 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 (or 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
Ms. Jacquelyn Nowell at telephone number [phone], extension 512.
Sincerely
priginal Signed By
David A. Goodrich
Gregory J. Thorpe, Ph.D.
cc: Central Files
Mooresville Regional Office / Water Quality Section
NPDES Permit File
Point Source Compliance /Enforcement Unit
Technical Assistance & Certification Unit
N. C. Division of Water Quality / NPDES Unit Phone: [phone]
1617 Mail Service Center, Raleigh, NC 27699-1617 fax: [phone]
Internet: h2o.enr.state.nc.us DENR Customer Service Center: 1 800 623-7748

Permit NCO085812
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
PERMIT
f
r 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,
Union County Public Works
is hereby authorized to discharge wastewater from a facility located at the
Grassy Branch Wastewater Treatment Plant
NCSR 1610
Monroe
Union County
to receiving waters designated as the Crooked Creek 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 permit shall become effective May 1, 2002.
This permit and authorization to discharge shall expire at midnight on October 31, 2003.
Signed this day March 18, 2002
Original Signed 8
David A. Goodrich
Gregory J. Thorpe, Ph. D., Acting Director
Division of Water Quality
By Authority of the Environmental Management Commission

Permit No. NCO085812
SUPPLEMENT TO PERMIT COVER SHEET
Union County Public Works
is hereby authorized to:
1. Continue to operate an existing 0.050 MGD package type extended aeration
wastewater treatment plant consisting of influent pump station, bar screen, two
=f.
a aeration basins, two clarifiers, e d _Ysludge __q g9g01,, two tertiary filters,
ultraviolet disinfection with bac up chlorination/dechlonnation, continuous flow
n4 recording device and standby p wer with automatic transfer switch located at the
.� Grassy Branch Wastewater T atment Plant off NCSR 1610, Monroe, Union
County, and
2. Discharge from said treatment works at the location specified on the attached map
into Crooked Creek, which is classified C waters in the Yadkin -Pee Dee River
Basin.

7
td
X
Facility
Information
Latitude:
35*07' 50'
Sub -Basin: 03-07-12
Longitude:
W29' 44Y'
Ouad #-
G17NW
Stream Class:
C
Receiving Stream: Crooked Creek
Permitted Flow:
0.050 MQD
s
5 i -
%
1AZN)a
lam
t
N-i
Facility
Location
Union Co: Grassy Branch WWTP
Notfh-r— NC0085812
Union County

A (1). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Permit No. NCO085812
During the period beginning on the effective date of the permit and lasting until August 31, 2002, the Permittee is authorized to discharge from outfall serial
number 001. Such discharges shall be limited and monitored by the Permittee as specified below:
Monthly
Average
weekly
Average
Daily maximum
Measurement
Frequency
sample
Type
Sample
Location'
Flow
on muous
---Recording
I or
BODE, (April 1 - October 3)
5.0 mg
mg
Weekly
omposi e
BODE, (AprU —October 3
Weekly
ra
BODE, (November 1 — March 31)
mg
mg
Weekly
Composite
BOD5 (November 1— March 31)
Weekly
Grab
---'Composite
Total Suspended Solids
mg
mg
Weekly
Total Suspended Solids2
Weekly
Grab
3 as(April — October
mg
Weekly
Composite
3 as (November 1 — March 31)
4.0 mg
Weekly
Composite
Dissolved Oxygen
ee y
Grab,
Fecalo i orm (geometric mean
m
m
Weekly
Grab
E,U,U
pH
Weekly
Grab
Total Residual Chlorine
17 pg2/Week
Grab
Temperature oC
Daily
Grab
Temperature °C
Weekly
Grab
U'D
--up
ConductivityWeekly
Grab
Notes:
i Sample Locations: E - Effluent, I — Influent, U- Upstream 50 feet above the discharge point, D- Downstream at the NC 218 bridge. See Supplement to Effluent Limitations
Page A (2). Instream monitoring requirements may be provisionally waived.
2 The monthly average BODE, and Total Suspended Residue 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 6.0 mg/l.-
a The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units.
s Limitation is required only if chlorine is used for disinfection.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

A (2). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Permit No. NCO085812
During the period beginning on September 1, 2002 and lasting until expiration, the Permittee is authorized to discharge from outfall serial number 001. Such
discharges shall be limited and monitored by the Permittee as specified below:
EFFLUENT CHARACTERISTICS
LIMITS
MONITORING-,RF-QUIRF-MENTS
ti
Monthly
Average
Weekly
Average
Daily Maximum
easuremen
Frequency
amp a
Type
Sample
Location'
ow
on nuous
ecor ing
or
D5 (April 1— cto er 31)
FB
mg
mg
ee y
omposi e
,OD5
(November 1 — March 31)
10.0 mg
mg
Weekly
omposi e
Ej
Total Suspended Solds
30.0 mg
mg
weekly
Composite .
,
NH3 as(April — October
mg
Weekly
Composite
3 as (November 1 — March 31)
4.0 mg
Weekly
Composite
Dissolved Oxygen3
WeeWy—ra
,
Fecal o i orm (geometric mean
m
m
Weekly
Grab,
PH4
weekly
Grab
Total Residual Chlorine
17 Ng/I
21weeK
Grab
Temperature cC
Daily
Grab
Temperature °C
Weekly
Grab
U'D
Conductivity
Weekly
ra
,
Notes:
1 Sample Locations: E - Effluent, I — Influent, U- Upstream 50 feet above the discharge point, D- Downstream at the NC 218 bridge. See Supplement to Effluent Limitations
Page A (2). Instream monitoring requirements may be provisionally waived.
2 The monthly average BOD5 and Total Suspended Residue 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 6.0 mgll.
4 The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units.
s Limitation is required only if chlorine is used for disinfection.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

Permit NCO085812
SUPPLEMENT TO EFFLUENT LIMITATIONS
AND MONITORING REQUIREMENTS
SPECIAL CONDITIONS
A. (3) PROVISIONAL WAIVER OF INSTREAM MONITORING REQUIREMENTS
Instream monitoring requirements in this NPDES permit shall be provisionally waived so long as
the Permittee remains a member of the Yadkin River Basin Association and the Association
continues to function as approved by the Division and Environmental Management Commission.
If the Permittee does not participate in the Association or if the Association ceases to function,
the instream monitoring requirements in this permit become effective immediately; and the
Division may reopen this permit by administrative letter to establish additional instream
monitoring requirements, it deems necessary to adequately characterize the effects of the
discharges on water quality in the receiving stream.

UNION COUNTY PUBLIC WORKS DEPARTMENT
Jon C. Dyer, P.E., Director
January 22, 2001
Ms. Jacquelyn M. Nowell
NPDES Unit
NCDENR DWQ
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
SUBJECT: Draft NPDES Permit NCO085812
Union County Public Works - Grassy Branch W WTP
Dear Ms. Nowell,
Public Works is in receipt of the referenced Draft Permit. Only recently has Public Works become aware
of the requirement for all POTW's to demonstrate a removal efficiency of not less than 85%. We currently
have three (3) permitted facilities that have Daily Maximums as opposed to Weekly Averages. These
facilities are Grassy Branch W WTP NC0085812, Tallwood W WTP NCO069523 and Olde Sycamore
WWTP W00011928.
There are no objections to the limits or conditions contained in the Draft Grassy Branch Permit. Public
Works does, however, request that "grab" samples be allowed to be substituted for influent "composite"
samples until mid -August 2002. As you are aware, in order for a composite sample to be representative of
the incoming waste -load, the sample needs to be flow proportional. Additionally, the flow proportionate
samples need to be kept at temperature around YC to ensure sample integrity. Public Works is of the
opinion that the best way to ensure proper sample collection and field preservation is through the use of a
programmable refrigerated sampler with the ability to accept and process sampling queues.
A sampler that meets the above description, such as lsco's Model 3710FR lists for S4500.00. The S4500.00
price tag does not include sampler tubing, sample container or a "flow detection probe". Public Works
would like to simultaneously outfit each of the three (3) W WTP s with a programmable flow proportional
refrigerated sampler. By outfitting each facility, Public Works will be ready to meet permit requirements
for removal efficiency as they arise and Public Works will most likely get a price break for buying three (3)
units at the same time. Whether purchased one at a time or in multiple, the end cost is a fiscal year budget
amount. The County fiscal year runs Julyl to July 1. The above mentioned request to allow grab samples
until mid -August would allow Public Works adequate time to get proper budget appropriations, order and
install the units.
Thank you for you consideration of these matters. Should you require additional information please do not
hesitate to contact me at (704) 2964215.
R fully, _
� 5
O,n
k . Tye o w
Assi t Public Works ' ector Ln
4 �
i� cV 3w
Z z�
� Q z
� we
oa
400 North Church St. Monroe, North Carolina 281124804 Phone: [phone] Fax: [phone]

Ni
Nlff(1'll CAROLINA, 1v
PUBLIC NOTICE permit number in any com- UNION COUNTY.
STATE OF munication. Interested ppeer-
NORTHCAROLINA sons may also visd the C. AFFIDAVIT OF PUBLICATION
ENVIRONMENTAL Sion of Water Quality at 512
MANAGEMENT N. Salisbury Street, Raleigh, Ilefore the County y undersigned. a Notary Public of said and Slate, duly
COMMISSION/NPDES UNIT NC 27604-1148 between me
1617 MAIL SERVICE hours of 8:00 a.m. and 5:00 r'0111111it sioned, qualified, and authorized by law to administer oaths,
CENTER p.m. to review information on
RALEIGH, NC tile. r5o11a11
27599.1617 NPDES Permit Number personally y appeared . . . . . John W... LoynoEin . . . .
NOTIFICATION OF INTENT NCO085812, Union Co.. '
TO ISSUE A NPDES Grassy Sandi WWTP. 400 µlet being first duly p y
WASTEWATER PERMIT North Church Street, Mon- y sworn, deposes aad says: that he is
On the basis of thorough me, NC 28112 has applied publisher.
staff review and application for a permit renewal for a fa- . . • . . . . . . . . . . . . . engaged in the publication
of NC General Statute c0hylocated inumonCounty of a newspaper known as The Enquirer -Journal, published, issued, and
143.21, Public law 92.500 discharging treatedwastewa- entered as second class mail in the City y
and other lawful standards ter into Crooked Creek in the y of Monroe in said Count and
and regulations, the North Yadkin Pee Dee River Basin. Stale; that he is authorized to make this affidavit and sworn statement;
Carolina Environmental Man- Currently BODS, N113, dis- that the notice or other legal advertisement, a true co of Which is
agement Commission pro- solved oxygen, fecal coliform g py
poses to issue a National and total residual chlorine attached hereto, was published in The Enquirer -Journal on the following
Pollutant Discharge Elimina. are water quality limited. This dates.
tion System (NPDES) waste- discharge may affect future
water person(s)
)listedcharge permite the the
in this portion of
persons) listed below elide- the ember 14, 001 -.
fivedate
45 days from the Publish December 14, 2001 - -
Written
this notice.
the proposed
comments regarding
the proposed permit will be .
ameptetl until 30 days after
the publish date of this no- and that the said newspaper in which such notice, paper, document, or
rice. All comments received legal advertisement was published was, at the time of each and every such
Soar to that date are cn
erect in the final determirmina- Publication, a newspaper meeting all the requirements and qualifications
e-
dons ngthe proposed of Section 1-597 of the General Statutes of North Carolina and was a
permit. a of
of the qualified newspaper within the meaning of Section 1-597 of the General
NC D decide of Water Quality
may decide a hold a public Statutes of North Carolina.
meeting for the proposed
Serve should the t Division re-
ceive a Significant degree of
Public interest. This of 2001
Copies of the draft permit - - . . . ... .
and other supporting used
infer-
matron On file used to deter-
mine conditions present in ' ' - - .
the draft permit are available
upon request and payment of
the costs en reproduction. Sworn to and subscribed before me, this �.1. day of/ac. 2001
Mail comments tion t re-
quests for information to the
NC Division of Water or Quality
the above addresa or cell M
s.Christie Jackson(919) ( ,(,fir[s
733.5083, extensionn sae. ' ' . �''� •"'• •^�• - •Notary Public
My Commission expires: . .
Inches: tJ
MONROE,N
—IN ACCOUNT WITH-
S-it-aao3.............
A1LFf /q- 2001
ACCOUNT YF: Oct `QQPLZ I
COST: $ 6 7J
04e 4'Enqurr.er-311uurutti
P.O. Box 5040
500 W. Jefferson St.
Monroe, N.C. 28111-5040
Important Legal Document, Please Retain

DENR/DWQ
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
NPDES No. NCO085812
Facility Information
Applicant Facility Name:
Union Co. Public Works Dept. Grassy Branch WWTP
Applicant Address:
400 North Church St. Monroe, N.C. 28112-4804
Facility Address:
1629 Old Fish Rd. Unionville, N.C. 28110
Permitted Flow
0.050 MGD
Type of Waste:
100% Domestic
Facility/Permit Status:
Renewal
Facility Classification
II
County:
Union
Miscellaneous
Receiving Stream:
Crooked Creek
Regional Office:
Mooresville
Stream Classification:
C
USGS To o Quad:
G17NW
303(d) Listed?:
Yes
Permit Writer:
Jackie Nowell
Subbasin:
03-07-12
Date:
November 8, 2001
Drainage Area mil :
43.9
Summer 7Q10 cfs
0.0
Winter 7Q10 (cfs):
0.4
Average Flow cfs :
10.6
IWC % :
Primary SIC Code:
14952
SUMMARY OF FACILITY AND WASTELOAD ALLOCATION
Union Co. Public Works Dept is requesting renewal of an existing NPDES permit discharging
from the Grassy Branch WWTP to the receiving stream, Crooked Creek. The permit is for a
discharge of treated domestic wastewater. The design capacity of the facility is 0.050 MGD.
This facility was constructed and wasteflow from three schools was routed here. The average
wasteflow as of August 2001 was 0.007 MGD, approximately 13% of design capacity.
Application indicates that facility serves between 1000 —4999 persons. Review of compliance
data indicates plant had problems meeting limits at startup with violations of BOD5, and NH3
limits in 1998, but performance has improved greatly in the last year and a half.
Crooked Creek is listed on the North Carolina 2000 303(d) list, from source to the Rocky River
with potential sources of urban runoff/storm sewers. The recommended TMDL and
management strategy for addressing oxygen consuming waste is that before any new outfalls
are permitted, additional chemical/physical data be collected to aid in assessing the
assimilative capacity of the proposed receiving stream. The entire Crooked Creek has a use
support rating of partially supporting. The 1996 benthic classification for Crooked Creek was
fair.
Existing Effluent Limits
Qw = 6.0 MGD
BOD5 (summer) = 5 mg/l
BOD5 (winter) = 10 mg/1
NH3 (summer) = 2 mg/l
NH3 (winter) = 4 mg/l
Dissolved Oxygen = 6 mg/l
TSS = 30 mg/l
Fecal Coliform = 200/ 100ml
TRC = 17 ug/l
pH = 6-9 SU
Weekly monitoring for temperature and conductivity.
t3C GE?t. CF E-174i t0l21A 41
ot.?X dATUPALRESOURCES
d ilkESYll.LEREGIONALOFFIC&
r CK'i (�
.la:a1 V �.
DEC 1 0 2001
WATER QUALITY SECT100
Union Co. -Grassy Branch WWTP Fact Sheet
NPDES Renewal
Page 1

COMPLIANCE SUMMARY:
January through August 2001, Avg. Qw = 0.007 MGD (approximately 14% of capacity),
BOD5=3.93 mg/l, NH3=1.05 mg/l, TSS=5.1 mg/l, and Fecal Coliform =39.5/ 100ml.
In 2000, Avg. Qw = 0.0065 MGD (approximately 13% of capacity), BOD5=2.1 mg/l, NH3=0.66
mg/l, TSS=2.7 mg/l, and Fecal Coliform =30.7/ 100ml.
In 1999, Avg. Qw = 0.0065 MGD (approximately 13% of capacity), BOD5=4.99 mg/l, NH3=5.44
mg/l, TSS=6.9 mg/l, and Fecal Coliform =30.7/ 100ml. One BOD5 violation in May and three
NH3 violations in January, February and May.
In 1998, Avg. Qw = 0.0084 MGD (approximately 17% of capacity), BOD5=10.5 mg/l,
NH3=15. 57 mg/ 1, TSS=9.9 mg/ 1, and Fecal Coliform =80.2 / 100ml. Four BOD5 violations in
September through December, four NH3 violations in August through December,
one fecal coliform violation in October and one pH violation in November.
INSTREAM MONITORING:
Permit requires instream monitoring for temperature, DO, fecal coliform and conductivity.
Upstream site is 50 ft upstream of outfall. Downstream site is NC 218. The Grassy Branch
WWTP is a member of the Yadkin River Basin Association and instream monitoring is a
coordinated effort among members. An ambient station is at Crooked Creek at NC 218
near Monroe (Q8388000).
COMPLIANCE SUMMARY:
11 / 2 / 00 - NOV -Compliance Evaluation Inspection for weekly fecal coliform violations
3/23/99 - NOV Compliance Evaluation Inspection for weekly fecal coliform violations
8/ 19/99 - NOD Compliance Sampling Inspection -accessed civil penalties for NH3
violations
5 / 21 / 99 - NOV and civil assessment of $1068.56 for NH3 in 2 / 99
5 / 14 / 99 - NOV and civil assessment of $1318.56 for fecal, BOD5. NH3 in 1 / 99
4 / 16 / 99 - Request for rescission of civil penalty reduced to $3078.14
4/ 15/99 - Request for rescission of civil penalty
10/ 14/99 - Payment acknowledgement Civil Penalty Assessment of $3198.50
6 / 2 5 / 99 - Request for rescission of civil penalty
6 / 3 / 99 - Request for rescission of civil penalty is denied
3/ 19/99 - NOV and civil assessment of $2069.07
3 / 17 / 99 - Request for rescission of civil penalty
2/ 12/99 - NOV and civil assessment of $2568.56
1/22/99 - NOV and civil assessment of $3878.14
3 / 4 / 98 - Classification as a class III facility
TOXICITY TESTING:
None Required
PROPOSED CHANGES:
• The addition of a special condition noting the provisional waiver of instream monitoring
while Grassy Branch WWTP is a member of the Yadkin River Association.
PROPOSED SCHEDULE FOR PERMIT ISSUANCE:
Draft Permit to Public Notice: 12 / 12 / 2001
Permit Scheduled to Issue: 02 / 04/ 2002
Effective Date: 03 / 01 / 2002
Union Co. -Grassy Branch WWTP Fact Sheet
NPDES Renewal
Page 2

STATE CONTACT:
If you have any questions on any of the above information or on the attached permit, please
cont atJCkNoweelll at �(919)73Q3-j5083 ext. 512.
C
3/d//e/7FZ/NAM
Oi✓%L 'rb✓✓G=/L I/i 77. ••� 9N %2 - i9-o �/ ?Z,;-5 SE A Db 1 O Tr1�
%o,tX �i2G.YrW- P"O-_6 ._
;�'�-novgL �z 3��f Ts.Z . gc so joli YsErto7G / r7 ')F Ijo 1-71
C/47whV"oIer DrS/N/Z'zl%U✓ t�./Tf�r3rcK 4,,p oPirnTi7
: 12—Zd—c/
ft-
NPDESSUPERVISOR COMMENT:
Union Co. -Grassy Branch WWTP Fact Sheet
NPDES Renewal
Page 3

SOC PRIORITY PROJECT: Yes No X
To: Permits and Engineering Unit
Water Quality Section
Attention: Valery Stephens
Date: July 9, 2001
NPDES STAFF REPORT AND RECOMMENDATION
County: Union
MRO# 01-91
Permit No. NC0085812
PART I - GENERAL INFORMATION
Facility and Address: Grassy Branch WWTP
400 North Church Street
Monroe, North Carolina 28112
2. Date of Investigation: July 5, 2001
3. Report Prepared By: Samar Bou-Ghazale, Env. Engineer.I
DE C E 1111
JUL i 7 2021 I D
J
DENR-WATER QUALITY I
POINT SOURCEBf
4. Persons Contacted and Telephone Number: Mr. Mark Tye, Union County Assistant Public
Works Director, [phone]
5. Directions to Site: From the intersection of Highways 601 and 218 in northern Union
County, travel west on Highway 218 approximately 1.90 mils to the junction with Unionville
Brief Road (SR 1601). Turn right onto SR 1601 and travel south approximately 0.7 mile to
the junction with SR 1610 (Old Fish Road). Turn left onto SR 1610 and travel west
approximately 0.6 mile to the WWTP located at the end of a dirt road.
6. Discharge Point(s). List for all discharge points:
Latitude: 350 07' 50" Longitude: 80' 29' 40"
Attach a U.S.G.S. map extract and indicate treatment facility site and discharge point on
map.
USGS Quad No.: G 17 NW USGS Name: Stanfield, NC
Site size and expansion are consistent with application?
Yes X No_ If No, explain:

8. Topography (relationship to flood plain included): The site is relatively flat with 1-3 %
slopes. The facility is not in a flood plain.
9. Location of nearest dwelling: Approximately 1000 feet
10. Receiving stream or affected surface waters: Crooked Creek
a. Classification: C
b. River Basin and Subbasin No.: Yadkin -Pee Dee & 03-07-12
C. Describe receiving stream features and pertinent downstream uses: The receiving
stream is about 35 to 40 feet wide with a rock/sand/mud bottom. The water in the
stream is muddy and about 15 inches deep with a noticeable flow. Downstream uses
are typical for class C waters.
PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. a. Volume of wastewater to be permitted: 0.05 MGD (Ultimate Design Capacity)
b. What is the current permitted capacity of the wastewater treatment facility? 0.05
MGD
C. Actual treatment capacity of the current facility (current design capacity)? 0.05
MGD
d. Date(s) and construction activities allowed by previous Authorizations to Construct
issued in the previous two years: N/A.
e. Please provide a description of existing or substantially constructed wastewater
treatment facilities: The existing facility is an extended aeration consisting of two
aeration basins, two clarifiers, one sludge holding tank, two tertiary filters, ultraviolet
disinfection with backup chlorination/dechlorination, standby power with automatic
transfer switch, and instrumented effluent flow measuring.
f. Please provide a description of proposed wastewater treatment facilities: N/A.
g. Possible toxic impacts to surface waters: None at this time.
h. Pretreatment Program (POTWs only): N/A.
2. Residuals handling and utilization/disposal scheme:
a. If residuals are being land applied, please specify DWQ: N/A
Pa ge 2

b. Other disposal/utilization scheme (specify): Sludge is removed by Union County
Public Works Department and transported to the Crooked Creek WWTP for disposal.
3. Treatment plant classification (attach completed rating sheet): Class II
4. SIC Code(s): 4952
Primary: 03 Secondary:
Main Treatment Unit Code: 06107
PART III - OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction Grant Funds or are any public monies
involved (municipals only)? N/A.
2. Special monitoring or limitations (including toxicity) requests: None.
3. Important SOC, JOC or Compliance Schedule dates: N/A
4. Alternative Analysis Evaluation: Has the facility evaluated all of the non -discharge options
available. Please provide regional perspective for each option evaluated.
Spray Irrigation: N/A.
Connection to Regional Sewer System: N/A.
Subsurface: N/A
Other Disposal Options: N/A
5. Air Quality and/or Groundwater concerns or hazardous materials utilized at this facility
that may impact water quality, air quality or groundwater? No known air quality,
groundwater or hazardous materials concerns.
6. Other Special Items: None.
PART IV - EVALUATION AND RECOMMENDATIONS
Union County Public Schools requests renewal of its NPDES Permit for the discharge of
treated wastewater from the subject facility.
An on -site investigation revealed the WWTP to be in good operational condition.
Pa ge 3

It is recommended that the NPDES permit be reissued to the applicant as requested.
Signature
Water QualiYy Regional Supervisor
7ZI°
Date
Page 4

UNION COUNTY PUBLIC WORKS DEPARTMENT
Jon C. Dyer, P.E., Director
April 12, 2001
Ms. Valery Stephens
NCDENR / Water Quality / Point Source Branch
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
SUBJECT: Renewal of NPDES Permit No. NC0085812
Union County Public Works
Grassy Branch WWTP
Dear Ms. Stephens:
0
�z
CD
�C
CV
Qm
tK
a
0-
�
4
ui C
Please find enclosed a complete permit renewal package for the above referenced facility.
Please consider the submission of this package as a formal request for renewal. There
have been no modifications to the facility since issuance of the last permit.
Should you require additional information please do not hesitate to contact Mark Tye at
[phone].
Respectfully,
4� /�
Jon er, P.E.
Director of Public Works
400 North Church St. . Monroe, North Carolina 28112-4804 . Phone: [phone] . Fax: [phone]

UNION COUNTY PUBLIC WORKS DEPARTMENT
Jon C. Dyer, P.E., Director
RESIDUALS MANAGEMENT PLAN
Grassy Branch WWTP
NPDES Permit No. NCO085821
Union County, North Carolina
Residuals generated at the Grassy Branch WWTP will be transported via vacuum truck to
Union County's Crooked Creek WWTP (NC0069841). All residuals at the Crooked
Creek facility will be aerobically digested. The residuals will be considered stable and
therefore suitable for land application when the following criteria are met:
I. At least seven (7) residuals samples will be collected and analyzed for Fecal Coliform
each monitoring period. The geometric mean of the densities of these samples will be
calculated and will be less than 2,000,000 most probable number per gram of dry
solids, or less than 2,000,000 Colony Forming Units per gram of total dry solids prior
to application.
2. Vector Attraction Reduction (VAR) will be met through one of the following options:
a) volatile solids reduction of 38% or greater b) biosolids injection or incorporation or
c) biosolids alkaline stabilization.
All residuals will be disposed of in accordance with Residuals Land Application Permit
No. WQ0007486.
Respectfully Submitted,
J C. Dyer,
Iic Works Director
400 North Church St. . Monroe, North Carolina 28112-4804 . Phone: [phone] . Fax: [phone]

UNION COUNTY PUBLIC WORKS DEPARTMENT
Jon C. Dyer, P.E., Director
RESIDUALS MANAGEMENT PLAN
Grassy Branch WWI?
NPDES Permit No. NCO085821
Union County, North Carolina
Residuals generated at the Grassy Branch WWTP will be transported via vacuum truck to
Union County's Crooked Creek WWTP (NC0069841). All residuals at the Crooked
Creek facility will be aerobically digested. The residuals will be considered stable and
therefore suitable for land application when the following criteria are met:
1. At least seven (7) residuals samples will be collected and analyzed for Fecal Coliform
each monitoring period. The geometric mean of the densities of these samples will be
calculated and will be less than 2,000,000 most probable number per gram of dry
solids, or less than 2,000,000 Colony Forming Units per gram of total dry solids prior
to application.
2. Vector Attraction Reduction (VAR) will be met through one of the following options:
a) volatile solids reduction of 38% or greater b) biosolids injection or incorporation or
c) biosolids alkaline stabilization.
All residuals will be disposed of in accordance with Residuals Land Application Permit
No. WQ0007486.
Respectfully Submitted,
JFicic.
er,
orks Director
400 North Church St. . Monroe, North Carolina 28112-4804 . Phone: [phone] . Fax: [phone]