NC0039420_Permit Issuance_20090121

NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue, Governor
January 21, 2009
Mr. Jacob Porter
Virginia Department of Transportation
1401 East Broad Street
Richmond, VA 23219
Dee Freeman, Secretary
Coleen H. Sullins, Director
Subject: Issuance of NPDES Permit NC0039420
I-77 Rest Area WWTP
Surry County
Dear Mr. Porter:
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 October 15, 2007 (or as subsequently
amended).
This final permit includes no major changes from the draft permit sent to you on
December 3, 2008.
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 demand is made, this
decision shall be final and binding.
Please note that this permit is not transferable except after notice to the Division. 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, the Coastal Area Management Act or any other Federal or Local
governmental permit that may be required. If you have any questions concerning this permit, please
contact Charles Weaver at telephone number [phone].
cc: Central Files
Winston-Salem Regional Office/Surface Water
NPDES Unit
Sin erely,
�n
&j
oleen H. Sullins
i
Protect rn
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
512 North Salisbury Street, Raleigh, North Carolina 27604
Phone: [phone] / FAX [phone] / Internet: www.ncwaterquality.org
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Naturally

v°
Permit NCO039420
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
Virginia Department of Transportation
is hereby authorized to discharge wastewater from a facility located at the
I-77 Rest Area WWTP
Interstate Highway 77 on the NC / VA state line
Surry County
to receiving waters designated as Naked Run Creek in subbasin 03-07-03 of 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 March 1, 2009.
This permit and authorization to discharge shall expire at .midnight on February 28, 2014.
Signed this day. January 21, 2009.
deen H. Sullins, Director
Division of Water Quality
By Authority of the Environmental Management Commission

Permit NCO039420
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 Virginia Department of Transportation is hereby authorized to:
1. Continue to operate an existing 0.02 MGD wastewater treatment system with the
following components:
♦ Bar screen and comminutor
♦ Aerated equalization basin
♦ Flow splitter box
♦ Three aeration basins
♦ Three secondary clarifiers
♦ Three sludge holding basins
♦ UV disinfection system
♦ Backup chlorine disinfection system with dechlorination
♦ Post aeration
♦ Ultrasonic flow meter
.The facility is located at the I-77 Rest Area off I-77 near the NCI VA- border, with
wastewater discharge occurring in Surry County.
2. Discharge from said treatment works at the location specified on the attached map
into Naked Run Creek, currently classified WS-IV Trout waters in subbasin 03-07-03.
of the Yadkin -Pee Dee River Basin.

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60
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Discharge location
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USGS Quad Name: Cana Lat.: 36033'36"
Receiving Stream: Naked Run Creek Long.: 80044'39"
Stream Class: WS- IV Trout
Subbasin: Yadkin -Pee Dee — 03-07-03
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Permit NCO039420
A. (1) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
During the period beginning on the effective date of the permit and lasting until expiration, the
Permittee is authorized to discharge from outfall 001. Such discharges shall be limited and
monitored by the Permittee as specified below:
PARAMETER
_..
: ` LIMITS
MONITORING REQUIREMENTS
Monthly ;;.
Average
Daily
Maximum
Measurement
Fre uenc
q Y .
Sample Type
-, Sample Location
Flow
0.02 MGD
Weekly
Instantaneous
Influent or Effluent
BOD, 5-day (20°C)
30.0 mg/L
4H mg/L
Weekly
Composite
Effluent
Total Suspended Solids
30.0 mg/L
45.0 mg/L
Weekly
Composite
Effluent
NH3 as N
(April 1— October 31
6.0 mg/L
30.0 mg/L
2/Month
Grab
Effluent
NH3 as N .
November 1— March 31
22.0 mg/L
35.0 mg/L
2/Month
Grab
Effluent
Total Residual Chlorine'
17 Ng/L
2NVeek
Grab
Effluent
Fecal Coliform
(geometric mean
200/100 ml
400/100 ml
Weekly
Grab
Effluent
Temperature (°C)
Weekly
Grab
Effluent
U&D
pH
> 6.0 and < 9.0 standard units
2/Month
Grab
Effluent
Total Nitrogen
NO2+NO3+TKN
Quarterly
Composite
Effluent
Total Phosphorus
Quarterly
Composite
Effluent
Footnotes:
1. U: upstream at least 100 feet from the outfall. D: downstream at least 300 feet from the outfall.
2. Limit and monitoring applies only if chlorine is used for disinfection. The facility shall report all
effluent TRC values reported by a NC certified laboratory including field certified. However, effluent
values below 50 µg/L will be treated as zero for compliance purposes.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

NORTH CAROLINA
SURRY 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 Ferris W. Simpson who being first duly
sworn, deposes and says: that he (she) is Business Manager
(Publisher or other officer or employee authorized to make affidavit) of
HEARTLAND PUBLICATIONS, LLC, engaged in the publication of a
newspaper known as MOUNT AIRY NEWS, published, issued, and
entered as periodicals class mail in the city of Mount Airy 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 MOUNT AIRY NEWS on the
following dates:
,1 )P(10t'aolr r�J
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 of 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 day of �C 1 52008
f
Signature of person making affida��a_
Sworn to and subscribed before me, this day of
2008
Notary Public
My Commission expires: November 27, 2012
Notary Public
Surry County, North Carolina
Sandra F. Boles
OMYCOMMission Expires
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
A[ NPDES WASTEWATER
Al PERMIT
On the basis of thorough
staff review and applica-
tion of NC General Stat-
ute 143.215.1 and 15A
NCAC 02H.0109 and
other lawful standards
and regulations, the
North Carolina Environ-
mental Management
Commission proposes to
issue a National Pollut-
ant Discharge Elimina-
tion System (NPDES)
wastewater discharge
permit to the person(s)
listed below effective 45
days from the publish
date of this notice.
Written comments re-
garding the proposed
permit will be accepted
until 30 days after the
Publish date of this no-
tice. All comments re-
ceived prior to that date
are considered in the fi-
nal determinations re-
garding 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 re-
ceive a significant de-
gree ofpublic interest.

Copies of the draft permit
The Surry County Board
and other supporting in-
of Education [P.O. Box
formation on file used to
364, Dobson, NC
determine conditions
27017-0364] has applied
present in the draft per-
for renewal of NPDES
mit are available upon
permit NC0041947 for
request and payment of
the North Surry High
the costs of reproduction.
School WWTP. This per
Mail comments and/or
mitted facility discharges
requests for information
treated domestic waste -
to the NC Division of Wa-
water to Stewarts Creek
ter Quality at the above
in the Yadkin -Pee Dee
address or call Dina
River Basin. Currently
Sprinkle [phone]
fecal coliform and total
at the Point Source
residual chlorine are wa-
Branch. Please include
ter quality limited. This
the NPDES permit num-
discharge may affect fu-
ber (below) in any com-
ture allocations in this
munication. Interested
portion of Stewarts
persons may also visit
Creek. The Virginia DOT
the Division of Water
(1401 East Broad Street,
Quality at 512 N. Salis-
Richmond VA, 23219)
bury Street, Raleigh, NC
has requested renewal of
27604-1148 between the
NPDES permit
hours of 8:00 a.m. and
NC0039420 for their 1-77
5:00 p.m. to review infor-
Rest Area WWTP dis-
mation on file. Bassett
charge in Surry County.
Furniture Industries (P.O.
This permitted facility
Box 626, Bassett, VA
discharges treated do-
24055) has applied for
mestic wastewater to
renewal of NPDES per-
Naked Run Creek in the
mit NC0027944 for their
Yadkin -Pee Dee River
Mount Airy Division
Basin. Currently fecal
WWTP in Surry County.
coliform and total resid-
This permitted facility
ual chlorine are water
discharges treated
quality limited. This dis-
wastewater to the Ararat
charge may affect future
River in the Yadkin -Pee
allocations in this portion
Dee River Basin. Cur-
of the Yadkin -Pee Dee
rently total residual chlo-
River Basin.
rine is water quality lim-
ited. This discharge may
Published: December 5,
affect future allocations
2008
in this portion of the Yad-
kin -Pee Dee River Basin.

NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Michael F. Easley, Governor
November 25, 2008
MEMORANDUM
To: Lee Spencer
NC DENR / DEH / Regional Engineer
Winston-Salem Regional Office
From: Charles H. Weaver, Jr.
NPDES Unit UV
Subject: Review of Draft NPDES Permit NCO039420
Virginia DOT / I-77 Rest Area WWTP
Surry County
William G. Ross, Jr., Secretary
Coleen H. Sullins, Director
T RECEIVED
N n ^cat. of ENR
DEC 0 8 2=
WinatonSalem
Regional Office
Please indicate below your agency's position or viewpoint on the draft permit and return this
form by December 29, 2008. If you have any questions on the draft permit, please contact
me at the telephone number or e-mail address listed at the bottom of this page.
NOTE: If no response is received by December 29, 2008, the Division will proceed with
issuance of the permit /or other actions, as necessary].
§§§§§§§§§§§§§§§§§§§§§§§§§§§§§§§§
RESPONSE: (Check one)
oncur with the issuance of this permit provided the facility is operated and maintained
properly, the stated effluent limits are met prior to discharge, and the discharge does not
contravene the designated water quality standards.
F-1
Concurs with issuance of the above permit, provided the following conditions are met:
❑ Opposes the issuance of the above permit, based on reasons stated below, or attached:
Signed Date: hc O
1617 Mail Service Center, Raleigh, North Carolina 27699-1617 919 807-6391 (fax) 919 807-6495
VISIT us ON THE INTERNET@hftp://www.ncwaterquality.org/NPDES [e-mail]
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MSA, P.C.
Environmental Sciences • Geosciences Planning Surveying
5033 Rouse Drive, Virginia Beach, VA 23462-3708
[phone] Office
- [phone] Fax
Jacob Porter
Virginia Department of
Transportation (VDOT)
1401 East Broad Street
Richmond, VA 23219
We are cP.nriino, vnn the following items'
Engineering • Landscape Architecture
36086 Lankford Highway, Belle Haven, VA 23306
P.O. Box 439, Belle Haven, VA 23306
Office [phone]
Fax [phone]
Date Project Number
08/ 18/2008 06127 U
i
Subject
NPDES Renewal Application Packag AUG 2 5 2008
OEtrR WATER QUALITY
Copies
Date
Description
3
08/14/2008
NPDES Renewal Application Package
�.9v.
For your use
As requested
For review & comment
Approved as noted
Other
For recordation
For signature
For signature and notarization
Response required
X Mail
Deliver
Pickup
Overnight
Via Fax #
Mr. Porter, Provided in the enclosed envelope there are four NPDES renewal application
packages. Can you please sign three of the NPDES renewal application packages provided in this
envelope. The other copy is for your records. Once you have signed the applications, please
forward the other three application packages to Mrs. Dina Sprinkle in the provided stamped
Cc-q qvaInpe.
Dina Sprinkle - NC Division of Water QualityAllen Campbell - VP�i-ni,-JhA—R
Transportation (VDOT) Title: Soil Scientist, AOSE#253
File Office: Virginia Beach

MSA, P.C.
5033 Rouse Drive, Virginia Beach, VA 23462-3708
[phone] • [phone] (FAX) • wwwmsaonline.com
Offices in Virginia Beach and Virginia's Eastern Shore
Environmental Sciences • Geosciences • Planning • Surveying • Engineering • Landscape Architectzue
August 14, 2008
Dina Sprinkle
�J
NC DENR/DWQ/Point Source Branch '
1617 Mail Service Center L� �, AUG 2 5 2008
Raleigh, North Carolina 27699-1617 l
DP'R WATER ^'jAIJTY
MSA, P.C.,::,�;ch
5033 Rouse Drive
Virginia Beach, Virginia 23462
Subject: NPDES Permit NCO039420 Renewal Package -Virginia Department of
Transportation I-77 Rest Area
Surry County
Mrs. Dina Sprinkle,
Virginia Department of Transportation operates a rest area located on I-77 North at mile
marker 1. The rest area provides traveling comforts and amenities to citizens traveling
along 1-77 North in Carroll County. The facility is served by a public water supply well
and an onsite wastewater treatment plant, which discharges disinfected effluent to a
receiving stream in Surry County, North Carolina. The receiving stream is the Naked Run
Creek in the Yadkin — Pee Dee River Basin. The North Carolina Department of
Environment and Natural Resources, Division of Water Quality has issued a NPDES
permit to establish this facility as being acceptable to discharge disinfected effluent to the
Naked Run Creek. The NPDES permit number for this facility is NCO039420 and
expires on February 28, 2009.
The Virginia Department of Transportation would like to request the renewal of this
NPDES permit, upon review of the renewal package. The facility has been offline for the
beginning of this year, 2008, due to facility renovation. However, the facility renovations
are completed and the facility is back online and operating within permitted capacity.
Should you have any questions or require additional information please contact me by
phone at [phone] or by email at Jason Fulbright(a,msaonline.com.
Sincerely
Jason Fulbri t, Soil Scientist
AOSE #253
"EXPERmNCE... THE MSA DIFFERENCE! ..

SOURCE: LAMBSBURG AND CANA VIRGINIA QUADRANGLES USGS TOPOGRAPHIC MAPS.
ORIGINAL SCALE 1:24,000,
FIGURE 1. SITE LOCATION MAP
NC NPDES
LAMBSBURG SAFETY REST AREA
AND WELCOME CENTER
CARROLL COUNTY. VIRGINIA
ii
M SA, P.C.
ENVIRONMENTAL SCIENCES, GEOSCIENCES, PLANNING,
SURVEYING, ENGINEERING & LANDSCAPE ARCHITECTURE
5033 ROUSE DRIVE
ti VIRGINIA BEACH, VIRGINIA 23462
? (757) 490 - 9264 FAX (757) 490 - 0634
www.msaonline.com kw
DATE: SCALE: MSA JOB #:
8/14/2008 NTS 06127U

9
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WELCOME REST
CENTER FACILITY
COMMINUTOR
& BAR SCREEN
SURGE TANK
AERATED VIA
FLOW SPUTTER BOX DIFFUSED AIR SYSTEM
PUMP
AERATION AERATION AERATION
TANK TANK TANK
SLUDGE SLUDGE SLUDGE
HOLDING HOLDING HOLDING
TANK TANK TANK
CLARIFIER
CLARIFIER CLARIFIER
TANK
TANK TANK
SLUDGE
RETURN
(tYP)
UV
CHLORINE
DISINFECTION
TANK
SYSTEM
ALTERNATE
DISINFECTION
SYSTEM
DECHLOR.
POST AERATION
TANK
OFFSITE
SLUDGE
DISPOSAL
ULTRASONIC
WASTEWATER
FLOW METER
To Outfall 001
MSA, P.C.
FIGURE 3. TREATMENT PROCESS ENVIRONMENTAL SCIENCES, GEOSCIENCES, PLANNING,
SURVEYING, ENGINEERING & LANDSCAPE ARCHITECTURE
5033 ROUSE DRIVE MiM=
NC NPDES VIRGINIA BEACH, VIRGINIA 23462
LAMBSBURG SAFETY REST AREA (757) 490 - 9264 FAX [phone]
www.msaonline.com
AND WELCOME CENTER DATE: SCALE: MSA JOB #:
CARROLL COUNTY. VIRGINIA 8/14/2008 NTS 06127U

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PHOTOGRAPHS
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SCIENCES,
SURVEYING,
ENmNEERING&LNDSCAPEARCHEECTURE
_c \ ROUSE/ z e
NC NPDES
LAMBSBURG SAFETY REST AREA
q&a-s4F G9a-«# -
Lan
www.msaonline.com
AND WELCOME CENTER
DATE:
SCALE:
TMSAJOB #:
CAR R O LL COUNTY. VIR GIN|A
$1¢2008
NTS
06127U

PHOTOGRAPHS
NC NPDES
LAMBSBURG SAFETY REST AREA
AND WELCOME CENTER
CARROLL COUNTY. VIRGINIA
Ilk
i
Photo 4
Aerator, crane
hoist, clarifiers, and
control panel.
Emergency
electrical generator
off left edge of
picture.
Photo 5
New UV light
disinfection system
building and
controls. Tablet de -
chlorination system
in blue beside
building.
MSA, P.C.
ENVIRONMENTAL SCIENCES, GEOSCIENCES, PLANNING,
SURVEYING, ENGINEERING & LANDSCAPE ARCHITECTURE
5033 ROUSE DRIVE
VIRGINIA BEACH, VIRGINIA 23462
(757) 490 - 9264 FAX (757) 490 - 0634
www.msaonlinexom
DATE: SCALE: MSA JOB #:
8/14/2008 NTS 06127U

Photo 6
4 �•r��� ,
Photo 7
PHOTOGRAPHS
NC NPDES
LAMBSBURG SAFETY REST AREA
AND WELCOME CENTER
CARROLL COUNTY. VIRGINIA
Post de -chlorination discharge manhole looking
down gravity effluent sewer line toward creek.
Looking down gravity effluent sewer line toward
creek.
MSA, P.C.
ENVIRONMENTAL SCIENCES, GEOSCIENCES, PLANNING,
SURVEYING, ENGINEERING & LANDSCAPE ARCHITECTURE
5033 ROUSE DRIVE
VIRGINIA BEACH, VIRGINIA 23462
(757) 490 - 9264 FAX (757) 490 - 0634
Um www.msaontine.com
DATE: SCALE: TMSA JOB #:
8/14/2008 NTS 06127U

�f
PHOTOGRAPHS
NC NPDES
LAMBSBURG SAFETY REST AREA
AND WELCOME CENTER
CARROLL COUNTY. VIRGINIA
Photo 8
6" outfall pipe drains
through concrete
bulkhead at base of
rock outcrop adjacent
to creek. Red steel
rod inserted into outfall
to highlight location.
Photo 9
Naked Run creek receiving waters just downstream
of outfall.
MSA, P.C.
ENVIRONMENTAL SCIENCES, GEOSCIENCES, PLANNING,
SURVEYING, ENGINEERING & LANDSCAPE ARCHITECTURE
5033 ROUSE DRIVE
VIRGINIA BEACH, VIRGINIA 23462
(757) 490 - 9264 FAX (757) 490 - 0634
LM www.msaonline.com
DATE: SCALE: MSA JOB #
8/14/2008 NTS 06127U

DESCRIPTION OF SEWAGE TREATMENT PLANT AND SLUDGE
MANAGEMENT
For:
VIRGINIA DEPARTMENT OF TRANSPORTATION
I-77 REST AREA LOCATED IN SURRY COUNTY
MSA Project # 06127U
Prepared For:
VIRGINIA DEPARTMENT OF TRANSPORTATION
1401 EAST BROAD STREET
RICHMOND, VA 23219
Issue Date: August 13, 2008
Charles H. Hall, P.G., Hydrogeologist
Associate — Director of Geosciences
■i-■■ gi■ MSA, P.C.
■■I ►ill 1■■
■■I IlkIri; :'�r■ 5033 Rouse Drive
Prepared By:
a44�
Signature
TEL [phone] FAX [phone]
www.msaonline.com

Description of Sewage Treatment Plant and Sludge Management
A. TYPE OF TREATMENT AND TREATMENT REQUIREMENTS
The wastewater treatment plant is a secondary treatment process utilizing the extended
aeration/activated sludge process. Plant effluent is disinfected utilizing a UV disinfection system and
re -aerated prior to discharge to the receiving stream. The UV disinfection system is backed up by an
alternate disinfection system which chlorinates and dechlorinates the treated effluent prior to discharge
to the receiving stream. Nitrification of the wastewater is also accomplished to meet effluent standard
regarding Ammonia Nitrogen (NH3-N). The plant is designed to treat domestic wastes generated from
the daily operations at the Carroll County Rest Area. The treatment facilities are capable of handling
an average daily flow of 6,667 gallons per day (gpd) through each of three parallel package plants for a
total of 20,000 gallons per day, and a total organic load of approximately 50 pounds of BOD5 per day,
and 12.5 pounds of ammonia NH3-N per day.
B. DESCRIPTION OF PLANT TYPE AND FLOW PATTERN
Collection System. Wastewater from the rest area is collected by a sanitary sewer and flows by gravity
into the influent of the treatment facility.
Treatment System. The wastewater enters the treatment plant at the comminutor where solids are
shredded and then flows through the bar screen to prevent remaining solids from entering the surge
tank. The surge tank is provided to reduce or equalize peak flows entering the plant and to maintain a
nearly constant rate of flow to the treatment process. Two surge pumps deliver the wastewater into the
flow control box. The flow control box controls the overflow level across a V-Notch weir thereby
regulating the flow. A flow splitter box splits the flow to the three aeration tanks. The flow rate
should be set to maintain the average daily flow but in no way should it exceed 15 gallons per minute.
The surge tank and aeration tanks are provided with blowers and diffused aerators, which provide the
necessary oxygen for biological growth. The aeration tanks are designed to completely mix the tank
contents and to provide sufficient oxygen for the biological organisms to grow. The total aeration tank
capacity has been increased with the addition of the third aeration tank to provide a detention time of 30
hours and the aeration blowers have also been sized to aid in the nitrification of the wastewater.
Nitrification is the process by which the ammonia in the wastewater is converted to nitrites and nitrates.
Nitrification will reduce the pollution effects of the effluent on the receiving stream. Overflows from
each aeration tank enters a clarifier tank where settled sludge is collected and either returned to the
aeration tank or wasted to the sludge holding tank by means of air lift sludge pump. The clarifier is a
hopper bottom tank sized for 6 hours detention time. Airlift sludge pumps are sized for 1 1/2 times the
design flow. Each of the sludge holding tanks are capable of holding 2000 gallons of
sludge. The extended aeration treatment plant is designed to remove the regulated constituents of
BOD5, total suspended solids and ammonia nitrogen below the regulated limits. The expected
efficiency should be 85% to 95% in order to meet the limitations.
The wastewater flows by gravity through the UV disinfection system where the remaining pathogens
are disinfected. The UV disinfection system utilizes ultra violet light to alter genetic DNA of bacteria,
viruses, mold, algae and other microorganisms. The alteration of the DNA sequence prevents the
reproduction process and the pathogens are considered dead; eliminating the risk of disease. The final
step in the treatment process is post aeration of the treated wastewater. The flow enters the post aeration
tank where the blowers and diffused aeration headers provide the required dissolved oxygen to meet the
effluent standards. An ultrasonic flowmeter in the post aeration tank is provided to indicate the
instantaneous flow rate, and to record the total flow through the treatment plant.
Sludge Handling. The extended aeration treatment process normally results in reduced quantities of
sludge to be wasted. Waste sludge is pumped from the clarifier to the sludge holding tank by the airlift
pumps. The operator controls the sludge return and waste rates by adjusting the gates within the

sludge return trough. The aeration header from the aeration tank is extended into the sludge holding
tank to provide oxygen to the sludge and thereby reduce sludge odors. An aerated sludge holding tank
is provided on each of the three package treatment plants. Each holding tank is sized at 20% of the
aeration tank volume for a combined capacity of 6000 gallons. The extended aeration process does not
generate much waste sludge. However, some sludge does require disposal. The operator hauls the
excess sludge, which has accumulated in the sludge holding tanks. Sludge is removed whenever the
tank becomes full with solids. The wastewater sludge hauler for Virginia Department of Tranportation
Rest Area located on I-77 at mile marker 1 is:
P.D. Quick, Inc.
133 Mason Road
Mt. Airy, NC 27030
The sludge is transported to the City of Mt. Airy. An estimated 9000 gallons of waste sludge is
transported each quarter.

FACT SHEET FOR EXPEDITED PERMIT RENEWALS
Racic Information to determine potential for expedited hermit renewal
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Permit Number
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Facility Name _
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Basin Name/Sub-basin number
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Receiving Stream
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Stream Classification in Permit
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Does permit need NH3 limits?
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Does permit need TRC limits?
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Does permit have toxicity testing?
Does permit have Special Conditions?
Does permit have instream monitoring?
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Is the stream impaired (on 303(d) list)?
Any obvious compliance concerns?
Nor
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Any permit mods since last ermit?
No
Existing expiration date
2
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New expiration date
Z
New permit effective date
Miscellaneous Comments
YES V This is a SIMPLE EXPEDITED permit renewal (administrative
renewal with no changes, or only minor changes such as TRC, NH3,
name/ownership changes): Include conventional WTPs in this group.
YES_ This is a MORE COMPLEX EXPEDITED permit renewal (includes
Special Conditions (such as EAA, Wastewater Management Plan), 303(d)
listed, toxicity testing, instream monitoring, compliance concerns, phased
limits). Basin Coordinator to make case -by -case decision.
YES_ This permit CANNOT BE EXPEDITED for one of the following reasons:
• Major Facility (municipal/industrial)
• Minor Municipals with pretreatment program
• Minor Industrials subject to Fed Effluent Guidelines (lb/day limits for BOD, TSS,
etc)
• Limits based on reasonable potential analysis (metals, GW remediation organics)
• Permitted flow > 0.5 MGD (requires full Fact Sheet)
• Permits determined by Basin Coordinator to be outside expedited process
TB Version 8/18/2006 (NPDES Server/Current Versions/Expedited Fact Sheet)
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