NC0039420_Wasteload Allocation_19871028

NPDES WASTE LOAD ALLOCATION
PERMIT NO.: NC0979s12 O
FACILITY NAME: ` T � S
Facility Status: PROPOSED
(circle one)
Permit S t a t u RE ;�4) MODIRCA•IION UNPERmn-rED NEw
(circle on
Major Minor-'
Pipe No: 0&?/'
Design Capacity (MGD):
Domestic (% of
Industrial (% of
Comments:
Flow): CT ro
Flow):
RECEIVING STREAM: G'Z�
Class: 1y =_ I l�
Sub -Basin: - e23 d.76-2i_"
Reference USGS Quad:,4ZQsW ,.,,.(please attach)
County:
Regional Office: As Fa Mo Ra Wa Wi WS
(circle owe)
Requested By - Date:
Prepared By: Date:
Reviewed By: --/Date:
0 2�
Modeler
Date Rec.
#
Sptj
9 Nil
-Zoz
Drainage Area (miZ) Avg. Streamflow (cfs):
7Q10 (cfs) Winter 7Q10 (cfs) 30Q2 (cfs)
Toxicity Limits: IWC _/_3 % (circle one) Acute /(Chron- !�)
Instream Monitoring:
Parameters /U rfG<a.,P lx4r U
Upstream Location (L&14 a)l5676ejUP_ ,
Downstream Location i)elo
j�reyt�• � �,e K%( �v r Sv�xhw� (,fir-Gc�� -
i A&Ak , 7 v y
Effluent
Characteristics
V
Summer
Winter
BODS (mg/1)
NH3 N (mg/1)
D.O. (mg/1)
TSS (mg/1)
F. Col. (/100ml)
/
pH (SU)
lloxl.G /C�`
LntiV VV4
Comments:,/4 tj_-610,eweK t -6 /V COA WA6W �L�d

Request No. :4202
--------------------- WASTELOAD ALLOCATION
APPROVAL
FORM ---------------------
Permit Number
: NC0039420
Facility Name
: VA DEPT OF TRANSPORTATION
Type of Waste
: DOMESTIC
Status
: EXISTING
Receiving Stream
: NAKED'WJN
Stream Class
: WSIII-TR
Subbasin
: 030703
County
: SURRY
Drainage Area
(sq mi) : 1.13
Regional Office
: 030703
Average Flow
(cfs) : 1.6
Requestor
: MACK WIGGINS
Summer 7010
(cfs) : 0.2
Date of Request
: 9/8/87
Winter 7010
(cfs) :
Quad
: A16SW
3002
(cfs)
-------------------------
RECOMMENDED
EFFLUENT LIMITS
-------------------------
Wasteflow
:
(mgd): 0.02
5-Day BOD
(mg/1): 30
Ammonia Nitrogen
(mg/l):
Dissolved Oxygen
(mg/l):
TSS
(mg/1): 30
Fecal Coliform (#/100ml):
1000
pH
(SU): 6-9
Res. Chlorine
(mg/1): 0.012
:
:
--------------------------------- MONITORING ---------------------------------
Upstream (Y/N): Y Location: ABOVE DISCHARGE POINT
Downstream (Y/N): Y Location: APPROXIMATELY 500 FT BELOW DISCHARGE
------- ------------------ COMMENTS -------------------------------------
FOR: NH3-N, FECAL COLIFORM, CONDUCTIVITY, TEMPERATURE,
AND PH. SEE ATTACHED CHRONIC TOXICITY LIMIT (REQUIRED FOR NH3-1%.l
TOXICITY). A RE -OPENER IS RECOMMENDED FOR NH3-N LIMIT - SEE ATTACHED
AMMONIA TOXICITY ANALYSIS WHICH SHOWS THE POSSIBLE LIMITATION FOR NHS-N.
COMPLIANCE MONITORING DATA ATTACHED.
��^
�w=�
-------------------------------------------------------------------
Recommended by ���� Date -Uw»I//
Reviewed by:
�
Tech. Support Supervisor Date
Regional Supervisor _ Date
Permits & Engineering _ Date
NOV0� ����
."w, �� nawv
RETURN TO TECHNICAL SERVICES BY

Facility Name �,M{ion, Permit 1'
TOXICITY TESTING REQUIREMENT
The effluent discharge shall at no time exhibit chronic toxicity using
test procedures outlined in:
1.) The North Carolina Ceriodaphnia chronic effluent bioassay proce-
dure (North Carolina Chronic Bioassay Procedure - Revised *February 1987) or
subsequent versions.
The effluent concentration at which there may be no observable inhibi-
tion of reproduction or significant mortality is 13 % (defined as treatment
two in the North Carolina procedure document). The permit holder shall
perform monitoring using this procedure to establish compliance
with the per.ut ondition. The first test will be performed within thirty
days from issuance of this permit. Effluent sampling for this testing shall
be performed at the NPDES permitted final effluent discharge 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 appropriate parameter code.
Additionally, DEM Form AT-1 (original) is to be sent to the following
address:
Attention: Technical Services Branch
North Carolina Division of
Environmental Management
P.O. Box 27687
Raleich, N.C. 27611
Test data shall be complete and accurate and include all supporting chemi-
cal/physical measurements performed in association with the toxicity tests,
as well as all dose/response data. Total residual chlorine must be measured
and reported if chlorine is employed for disinfection of the waste stream.
Should anv test data from this monitoring recuirement or tests per-
formed by the North Carolina Division of Environmental Management indicate
potential imnac'_s to the receiving stream, this permit may be re -opened and
modified to include alternate monitoring recuirements or limits.
NOTE: Failure to achieve test conditions as specified in the cited docu-
ment, such as minimum control organism survival and appropriate environmen-
tal controls, shall constitute an invalid test and will require immediate
retesting. Failure to submit suitable test results will constitute a fail-
ure of permit condition.
7Q10 ().Z- cfs
Permaited Flow 6,02,) MGD
Basin & Sub -basin 030
Receiving Stream jIn
County Lila(d
Recommended.

Ammonia Toxicity Analysis
for VA Dept. of Transportation Discharge
into Naked Bun Branch
The discharger has been found to have large amounts of NH:,-N in its
effluent. In the last year (8/86-7/87), NH-,-N levels have ranged
between 17 mg/l and 87 mg/l. The annual average, based on 4 quarterly
samples, was 57 mg/1 (see attached).
The effluent flows into Naked ull a class WSIII-trout water.
Trout are extremely sensitive to NH.,-N, and the relatively low flow
(7Q10 = 0.2 cfs) in the stream means that instream NH,-N concentrations
below the outfall are likely to be toxic during low flow periods.
EPA provides guidance ("Simplified Analytical Method for Determining
NPDES Effluent Limitations for POTWs Discharging into Low -Flow
Streams," 1980) for evaluating ammonia toxicity. The analysis entails
a mass -balance equation to predict the amount of allowable NH:,-N at the
milepoint below the discharge:
C„ _ [C„ * (Q-+Q-) - C-Q-1 /Qw
Where: CW = allowable wastewater NH,-N concentration
Cw = design wastewater flow
C„ = water quality standard for NH-,-N
(usually based on unionized NH:,-N, pH and temperature)
Q„ = upstream design low flow (7Q10)
C_ = upstream background NH,-N concentration
The EPA "Ambient Water Quality Criteria" document for ammonia (1984)
can be used to determine an appropriate standard for instream NH,-N.
Part a of the table on page 97 (attached -- Appendix A) of this docu-
ment is specifically established for Salmonids (trout species) based
on ambient pH and temperature. Instream monitoring data (8/86-7/87)
indicate representative summer pH and temperature conditions of 7.0 SU
and 20°C, respectively.
From the table in Appendix A, instream conditions correspond to an
allowable total ammonia concentration of 1.49 mg/l. This number can
be multiplied by 0.822 to convert it to mg/1 NH_, as N:
C„ = 1.49 * 0.822 = 1.22 mg/l NH,-N
Using the mass balance equation shown above, the allowable waste con-
centration of NH,-N is:
C„ _ [1.22 (0.2 + 0.031) - (0.2)(0.01)1/0.031
Where: QW = 0.02 MGD (0.031 cfs)
Q_ = 0.2 cfs (7Q10)
C„ = 0.01 mg/l NH,-N from USGS (1982)
Cw = 9.0 mg/l NH:,-N

References
USEPA. 1985. Ambient Water Quality Criteria for Ammonia - 1984.
NTIS, PB85-227114.
USEPA. 1980. Technical Guidance for Performing Waste Load Alloca-
tions: Simplified Analytical Methods for Determining NPDES
Effluent Limitations for POTWs Discharging into Low -Flow Streams.
- Monitoring and Data Support Division, (WH-553).
USGS. 1982. Water Quality of North Carolina Streams. pp B19-B25.

r \r v 4: . .•
APPENDIX A.
PH
(2) 4-day average concentrations for ammonia."
0C 5C 10C 15C 20C 25C 30C
A. Salmonids or Other Sensitive
Coldwater Species Present
_..... ........ .:._... . _
_:...._ .:...,...
_....__. .Un-ioni zed Ammonia-(mg/1-1 ter. NH3).:...:_.._
6.50
0.0007
0.0009
0.0013
0.0019
0.0019
0.0019
0.0019
6.75
0.0012
0.0017
0.0023
0.0033
0.0033
0.0033
0.0033
7.00
0.0021
0.0029
0.0042
0.0059
0.0059
0.0059
0.0059
7.25
0.0037
0.0052
0•.0074
0.0105
0.0105.
0.0105
0.0105
7.50
.0.0066
0.0093
0.0132
0.0186
0.0186
0.0186
0.0186
7.75
0.0109
0.0153
0.022
0.031
0.031
0.031
0.031
8.00
0.0126
0.0177
0.025
0.035
0.035
0.035
0.035
8.25
0.0126
0.0177
0.025
0.035
0.035
0.035
0.035
8.50
0.0126
0.0177
0.025
0.035
0.035
0.035
0.035
8.75
0.0126
0.0177
0.025
0.035.
0.035
0.035
0.035
9.00
0.0126
0.0177
'0.025
0.035
0.035
0.035
0.035
Total Ammonia
(mg/liter
NH3)
6.50
2.5
2.4
2.2
2.2
1.49
1.04
0.73
6.75
2.5
2.4
2.2
2.2
1.49
1.04
0.73
7.00
2.5
2.4
2.2
2.2
1.49
1.04
0.74
7.25
2.5
2.4
2.2
2.2
1.50
1.04
0.74
7.50
2.5
2.4
2.2
2.2
1.50
1.05
0.74
7.75
2.3
2.2
2.1
2.0
1.40
0.99
0.71
8.00
1.53
1.44
1.37
1.33
0.93
0.66
0.47
- - ---8.25-
0.87
0.82
0.78
0.76
b.54
0.39
0.28
8.50
0.49
0.47
0.45
0.44
0.32
0.23
0.17
8.75
0.28
0.27
0.26
0.27
0.19
0.15
0.11
_ 9.00
0.16
0.16
0.16
0.16 _
0.13
000'
0."08
B. Salmonids and Other Sensitive Coldwater
Species Absentt
Un-Ionized Ammonia (mg/liter NH3)
6.50
0:0007`
`O':0009
0.0013
4:0019
0.0026
O.Od2„"
0.0026
6.75
0.0012
0.0017
0.0023
0.0033
0.0047
0.6041
0.0047
7.00
0.0021
0.0029
0.0042
0.0059
0.0083
0.0083.
0.0083
.7.25
_.-0.0037_____.0.0052
_ 0.00.7.4 _
_ 0.0105.
._ 0.01-48._
-_-_.:0,.0148
0.0148
7.50
0.0066
0.0093
0.0132
0.0186
0.026
0.026
0.026
7.75
0.0109
0.0153
0.022
-0.031
0.043-
0.043.
_0.043.
8.00
0.0126
0.0177
0.025
0.035
0.050
0.050
0.050
8.25
0.0126
0.0177
0.025
0.035
0.050
0.050
0.050
8.50
0.0126
0.0177
0.025
0.035
0.050
0.050
0.050
8.75
0.0126
0.0177
0.025
0.035
0.050.
0.050
0.050
9.00
0.0126
0.0177
0.025
0.035
'0.050
0.050
0.050
Total Ammonia
(mg/liter
NH3) -
6.50
2.5
2.4
2.2
2.2
2.1
1.46
1.03
6.75-
2.5
2.4
2.2
2.2
2.1
1.47
1.04
7.00
2.5
2.4
2.2
2.2
2.1
1.47
1.04
7.25
2.5
2.4
2.2
2.2
2.1
1.48
1.05
7.50
2.5
2.4
2.2
2.2
2.1
1.49
1.06
7.75
2.3
2.2
2.1
2.0
1.98
1.39
1.00
8.00
1.53
1.44
1.37
1.33
1.31
0.93
0.67
8.25
0.87
0.82
0.78
0.76
0.76
0.54
0.40
8.50
0.49
0.47
0.45.
0.44
0.45
0.33
0.25
8.75
0.28
0.27
0.26
0.27
0.27
0.21
0.16
9.00
0.16
0.16
0.16
0.16
0.17
0.14
0.11
' To convert these values to mg/liter N, multiply by 0.822.
t Site-speclflt criteria development is strongly suggested at temperatures above 20 C
because of the limited data available to generate the criteria recommendation, and
at temperatures below 10 C because of the IImlted data and because small changes in
the criteria may have significant impact on the level of treatment required in
meeting the recommended criteria.
97

Request No. :4202
---------------------
WASTELOAD ALLOCATION
APPROVAL
FORM ------------------
Permit Number
: NC0039420
Facility Name
: VA DEPT OF TRANSPORTATION
Type of Waste
: DOMESTIC
Status
: EXISTING
Receiving Stream
: NAKED
Stream Class Class
: WSIII-TR
Subbasin
: 030703
County
: SURRY
Drainage Area
(sq mi)
: 1.13
Regional Office
: WSRO
Average Flow
(cfs)
: 1.6
Requestor
: MACK WIGGINS
Summer 7010
(cfs)
: 0.2
Date of Request
: 9/8/87
Winter 7010
(cfs)
:
Quad
: A16SW
3002
(cfs)
: 0.4
------------------------- RECOMMENDED EFFLUENT LIMITS -------------------------
Wasteflow
:
(mgd):
-
0
5-Day BOD
(mg/1):
4C
rAmmonia Nitrogen
(mg/1).
Dissolved Oxygen
(mg/l>:
TSS
(mg/1):
/ 30
Fecal Coliform (#/100ml):
1000
pH
(SU):
6-9
Res. Chlorine
(mg/1):
:
0.012
---------------------------------
:
MONITORING ------------------
Upstream (Y/N): Y Location: ABOVE DISCHARGE POINT
Downstream (Y/N): Y Location: APPROXIMATELY 50OFT BELOW DISCHARGE
---------------------------------- COMMENTS ----------------------------------
RECOMMEND MONITORING FOR: NH3N, F O IFORM, CONDUCTIVITY, T T \�.
�1 THE NH3N LIMIT IS GIVEN TO PROTEC REAM AMMONIA TOXICITY(ow ^
SEE COMPLIANCE DATA ATTACHED '
_______________________________________________________________________________
Recommended by __ Date
Reviewed by:
Tech. Support Supervisor _____________________ Date -------------
Regional Supervisor _____________________ Date -------------
Permits & Engineering _____________________ Date --------
RETURN TO TECHNICAL SERVICES BY

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