NC0029190_wasteload allocation_19911030

NPDES WASTE l
PERMIT NO.: NC0029190
PERMITTEE NAME: N. C. Department of Transportation
FACILITY NAME: DOT I - 77 Rest Area
Facility Status: Existing
Permit Status: Renewal
Major Minor
Pipe No.: 001
Design Capacity: 0.030 MGD
Domestic (% of Flow): 100 %
Industrial (% of Flow):
Comments:
RECEIVING STREAM: Naked Run
Class: WS-III
Sub -Basin: 03-07-03
Reference USGS Quad: A16SW (please attach)
County: S urry
Regional Office: Winston-Salem Regional Office
Previous Exp. Date: 3/31/92 Treatment Plant Class: 1
Classification changes within three miles:
No chance in three miles.
Requested by: Mack Wiggins Date: 8/29/91
Prepared by: Date:
Reviewed by: Date: / Lsb Cj
)AD ALLOCATION
!EE
ate Rec. #
�S
Drainage Area (mil) Avg. Streamflow (cfs):
7Q10 (cfs) p. Winter 7Q10 (cfs) t (L 30Q2 (cfs)
Toxicity Limits: IWC 11�� % ,
Acute/ oni
Instream Monitoring:
Y I
Parameters
Upstream �� �,_bstt&*Z414 atinnr,/�s.+��
Downstream / r ' tion
c
ems} S� d
Effluent
Characteristics
Summer
Winter
BOD5 (m )
-5 e>
NH3-N (mg/1)
j
D.O. (mg/1)
TSS (mg/1)
F. Col. (/100 ml)
PH (SU)
Comments:

Facility Name:
NPDES No.:
Type of Waste:
Facility Status:
Permit Status:
Receiving Stream:
Stream Classification:
Subbasin:
County:
Regional Office:
Requestor:
Date of Request:
Topo Quad:
FACT SHEET FOR WASTELOAD ALLOCATION
NC DOT I-77 Rest Area
NCO029190
Domestic - 100%
Existing
Renewal
Naked Run
WS-III
03-07-03
Surry
Winston Salem Regional Office
Mack Wiggins
8/29/91
A16SW
t
RECEIVED '
P.C. NO. kRCI)
;*"D M 3 19�f
Request #-i ton -Salem
�0 - Regional Office
N.C. Ca=pt. NRCD
1r)s cP,-rya!v,IYl
egioul Office
Stream Characteristic:
USGS #
est 211300075
Dk4w:
1986
Drainage Area (mi2):
1.13
Summer 7Q10 (cfs):
0.3
Winter 7Q10 (cfs):
0.6
Average Flow (cfs):
1.37
30Q2 (cfs):
0.7
IWC (%):
13
Cn
c-)
Wasteload Allocation Summary
(approach taken, co(r\respondence with region, EPA, etc.) co
�y
AC.; ll \..� �'V. e--..Jl.-� �1 �:%'G-✓� G� e. .b�,.� 4�[-...,.i-1.... �Of7- Al �...�/�",.:-�
Special Schedule Requirements andjadditional comments from Reviewers:
r[.
M.
Recommended by: , wk cw, 1 .-�-��- 0 Date: r • t- • I I
Reviewed by
Instream Assessment: Date: Lq
Regional Supervisor: _ _�O . C � Date:
Permits & Engineering: 0. Date: /o -415/
RETURN TO TECHNICAL SERVICES BY: OCT 0 8 liZj i

2
Existing Limits:
Wasteflow (MGD):
BOD5 (mg/1):
NH3N (mg/1):
DO (mg/1):
TSS (mg/1):
Fecal Col. (/100 ml):
pH (SU):
Residual Chlorine (µg/1):
Oil & Grease (mg/1):
TP (mg/1):
TN (mg/1):
Recommended Limits:
Wasteflow (MGD):
BOD5 (mg/1):
NH3N (mg/1):
DO (mg/1):
TSS (mg/1):
Fecal Col. (/100 ml):
pH (SU):
Residual Chlorine (µg/1):
Oil & Grease (mg/1):
TP (mg/l):
TN (mg/1):
Toxicity test (P/F):
CONVENTIONAL PARAMETERS
MonthlAverage
Su m i r
int r
0.030
0.030
30
30
monitor
monitor
2.0
2.0
30
30
1000
1000
6.0-9.0
6.0-9.0
10.6
10.6
n
Toxicity Test
Summer
Win r
0.030
0.030
30
30
monitor
monitor
2.0
2.0
30
30
200
200
6.0-9.0
6.0-9.0
10.6
10.6
Chronic Quarterly
(Ceriodaphina) Ch Vat 13%-
Monthlv Average with
Ammonia Limit
Summer
Winter
0.030
0.030
30
30
6.0
22
2.0
2.0
30
30
200
200
6.0-9.0
6.0-9.0
10.6
10.6
Limits Changes Due To: Param t r s Affected
Change in 7Q10 data
Change in stream classification
Relocation of discharge
Change in wasteflow
Other (onsite toxicity study, interaction, etc.)
Instream data
New regulations/standards/procedures X Fecal Coliform, NH3-N
New facility information
M or EL
EL
WQ
WQ
EL
EL
EL
WQ
X Parameter(s) are water quality limited. For some parameters, the available load capacity of
the immediate receiving water will be consumed. This may affect future water quality based
effluent limitations for additional dischargers within this portion of the watershed.
e"
No parameters are water quality limited, but this discharge may affect future allocations.

INSTREAM MONITORING REQUIREMENTS
Upstream Location: 50 feet upstream of discharge point
Downstream Location: 100 feet downstream of discharge bye VA DOT Rest Area discharge
Parameters: DO, Fecal Coliform, Temperature; Conductivity, pH
Special instream monitoring locations or monitoring frequencies:
MISCELLANEOUS INFORMATION & SPECIAL CONDITIONS
AAd 4uacy of Existing Treatment
Has the facility demonstrated the ability to meet the proposed new limits with existing treatment
facilities? Yes No < f'
If no, which parameters cannot be met? 0 . gl< ext"lf
Would a "phasing in" of the new limits be appropriate? Yes No Q/a.
If yes, please provide a schedule (and basis for that schedule) with the regional
office recommendations:
If no, why not?
Special Instructions or Condition
Wasteload sent to EPA? (Major) (Y or N)
(If yes, then attach schematic, toxics spreadsheet, copy of model, or, if not modeled, then old
assumptions that were made, and description of how it fits into basinwide plan)
Additional Information attached? (Y or N) If yes, explain with attachments.

Facility Name Permit # D Pipe # °O
CHRONIC TOXICITY PASS/FAIL PERMIT LIMIT (QRTRLY)
The effluent discharge shall at no time exhibit chronic toxicity using test procedures outlined in:
1.) The North Carolina Ceriodaphnia chronic effluent bioassay procedure (North Carolina Chronic Bioassay
Procedure - Revised *September 1989) or subsequent versions.
The effluent concentration at which there may be no observable inhibition of reproduction or significant mortality
is 1,2> % (defined as treatment two in the North Carolina procedure document). The permit holder shall perform
r r monitoring using this procedure to establish compliance with the permit condition. The first test will be
rm ter rty s from the effective date of this permit during the months of
ad . Effluent sampling for this testing shall be performed at the NPDES
permitted final efflu di ge below all treatment processes.
All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge
Monitoring Form (MR-1) for the month in which it was performed, using the parameter code TGP3B.
Additionally, DEM Form AT-1 (original) is to be sent to the following address:
Attention: Environmental Sciences Branch
North Carolina Division of
Environmental Management
4401 Reedy Creek Road
Raleigh, N.C. 27607
Test data shall be complete and accurate and include all supporting chemical/physical measurements performed in
association with the toxicity tests, as well as all dose/response data. Total residual chlorine of the effluent toxicity
sample must be measured and reported if chlorine is employed for disinfection of the waste stream.
Should any single quarterly monitoring indicate a failure to meet specified limits, then monthly monitoring will
begin immediately until such time that a single test is passed. Upon passing, this monthly test requirement will
revert to quarterly in the months specified above.
Should any test data from this monitoring requirement or tests performed by the North Carolina Division of
Environmental Management 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 and appropriate environmental controls, shall constitute an invalid test and will require immediate
retesting(within 30 days of initial monitoring event). Failure to submit suitable test results will constitute
noncompliance with monitoring requirements.
7Q 10 e7). -3 T_ cfs
Permitted Flow o . n3 o MGD
IWC 1-31— %
Basin & Sub -basin — o 7— o
Receiving S tream
County
61
Reco ended by:
Date /o .2,7. 9i
QCL P/F Version 9191

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Ammonia/chlorine Worksheet
II
IlFacility:
II
ZINC DOT I-77 Rest Area
Permit Number:
NCO029190 II
IlReceiving Stream:
Modeler:
njb II
IlNaked Run
II
Date:
06-Sep-91 II
II
II-------------------------------------
Ilsummer
I -------------------------------------II
I
II
IlNitrogen as NH3
(Residual Chlorine
II
II
II 7Q10 (cfs):
0.300
I
I 7Q10 (cfs):
II
0.300 II
II Design Flow (MGD):
0.030
I Design Flow (MGD):
0.030 II
II Design Flow (cfs):
0.047
I Design Flow (cfs):
0.047 II
II Stream STD (mg/1):
1.000
I Stream STD (ug/1):
17.000 II
IlBackground level (mg/1):
0.220
(Background level (ug/1):
0.000 II
II IWC ($):
13.420
1 IWC (%):
13.420 II
IlAllowable concentration
(Allowable concentration
II
II of NH3-N (mg/1):
6.032
1 of Chlorine (ug/1):
126.677 II
II
(Allowable concentration
II
11Winter
I of Chlorine (mg/1):
0.127 II
IlNitrogen as NH3
I
II
II
II 7Q10 (cfs):
0.600
I
I
II
II
II Design Flow (MGD):
0.030
I
II
II Design Flow (cfs):
0.047
I
II
II Stream STD (mg/1):
1.800
I
II
IlBackground level (mg/1):
0.220
I
II
11 IWC (%):
7.193
1
II
IlAllowable concentration
I
II
II of NH3-N (mg/1):
II---------------------------------------------------------------------------II
22.187
1
II
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be

• cc: Permits and Engineering
Technical Support Branch
County Health Dept.
Central Files
WSRO
SOC PRIORITY PROJECT: Yes
If Yes, SOC No.
To: Permits and Engineering Unit
Water Quality Section
Attention: (Mack Wiggins
Date: December 8, 1993
NPDES STAFF REPORT AND RECOMMENDATION
County Surry
Permit No. NCO029190
PART I - GENERAL INFORMATION
1. Facility and Address: I-77 Rest Area/Welcome Center
NC Dept. of Transportation
PO Box 25201
Raleigh, NC 27611
2. Date of Investigation: September 22, 1993
No
3. Report Prepared by: Lee G. Spencer
4. Persons Contacted and Telephone Number: Bonnie Miles, ORC
Facility # - [phone] [phone]
5. Directions to Site: From Winston-Salem, take US Hwy. 52
north to Hwy. 89. Turn left and go west to I-77.
Proceed north on I-77 until the first exit after
the Virginia state line. Travel across the
overpass and take I-77 south for -0.5 mile. The
facility will be on your right immediately behind
the Welcome Center.
6. Discharge Points(s), List for all discharge points:
Latitude: 360 33' 54" Longitude: 800 44' 47"
U.S.G.S. Quad No. A-16SW U.S.G.S. Quad Name CANA
7. Site size and expansion area consistent with application ?
x Yes No If No, explain:
8. Topography (relationship to flood plain included): WWTP
located well above floodplain.
9. Location of nearest dwelling: Welcome Center within _300'.

a
10. Receiving stream or affected surface waters: Naked Run
a. Classification: WS-IV Tr
b. River Basin and Subbasin No.: 03-07-03
C. Describe receiving stream features and pertinent
downstream uses: Clear flowing stream. Mostly
agricultural and very rural residential area.
Part II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. a. Volume of Wastewater to be permitted: 0.03 MGD
(Ultimate Design Capacity)
b. What is the current permitted capacity of the Waste
Water Treatment facility? 0.03 MGD
C. Actual treatment capacity of the current facility
(current design capacity)? 0.03 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: 30,000 GPD extended aeration package plant
with bar screen; comminutor; parallel aeration basins;
parallel clarifiers; a dosing tank; two surface
sandfilters; tablet -type chlorinator; chlorine contact
chamber; tablet type dechlorinator; and step aeration
at outfall.
f. Please provide a description of proposed wastewater
treatment facilities: None.
g. Possible toxic impacts to surface waters: None known.
h. Pretreatment Program (POTWs only): N/A
2. Residuals handling and utilization/disposal scheme: Sludge
is pumped by contract hauler and taken to a municipal WWTP
on a regular basis, according to Operator.
3. Treatment plant classification (attach completed rating
sheet): Class II
4. SIC Code(s): 9621 Primary 13 Secondary -
Main Treatment Unit Code: 0 6 1 x 7
NPDES Permit Staff Report
Version 10/92
Page 2

PART III - OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction Grant
Funds or are any public monies involved. (municipals only)?
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: Not enough area.
Connection to Regional Sewer System: Too far.
Subsurface: Impractical due to volume.
Other disposal options:
5. Other Special Items:
PART IV - EVALUATION AND RECOMMENDATIONS
The waste water system appeared to be well operated and
maintained on the day of the inspection. It was producing a
clear effluent.
This office does not object to the reissuance of this
permit.
1
Signature of report preparer
Water Quality Regional Supervisor
NPDES Permit Staff Report
Version 10/92
Date
Date
Page 3

i
3:
114 C00�-,1.WW -
LAT: 36033154"
LONG: 80044147"
RECEIVING STREAM: Naked Run
USGS Quad. No. : A-16SW
USGS Quad. Name: Cana
4042 , \ \• .tip �°'n 1a �`�� \ �U%