NC0038709_Wasteload Allocation_19900314

NPDES WASTE LOAD ALLOCATION
PERMIT NO.: NCO038709
PERMITTEE NAME: Wilkes County Board of Education / Roarin
Facility Status: Existing —
Permit Status: Renewal
Major Minor
Pipe No.:
i1
Design Capacity: 0.0045 MGD
Domestic (% of Flow): 100 %
Industrial (% of Flow): n/a %
Comments:
RECEIVING STREAM: an unnamed tributary to the Yadkin River
Class: WS-III
Sub -Basin: 03-07-01
Reference USGS Quad: C14NE (please attach)
County: Wilkes
Regional Office: Winston-Salem Regional Office
Previous Exp. Date: 7/31/90 Treatment Plant Class: 1
Classification changes within three miles:
No chance within three miles.
Requested by: _ Mack Wiggins Date: 1/4/90
Prepared by: Date: 3 f o
Reviewed by: Date: 4/q q 6
Modeler
Date Rec.
#
s 90
55-37
Drainage Area (mil ) �1% 1/0 Avg. Streamflow (cfs): LO.
7Q10 (cfs) C Winter 7Q10 (cfs) . 0, 30Q2 (cfs) • C
Toxicity Limits: IWC ICk % Acut om
Instream Monitoring:
Parameters-Do,_T,
Upstream v Location io0 F abc � k7
Downstream ✓ Location AIW�' aG X 6,,i(
Effluent
Characteristics
Summer
Winter
BOD5 (m )
30
NH 3 -N (mg/1)
�--
/ O
D.O. (mg/1)
TSS (mg/1)
3��
F. Col. (/100 ml)CL�C}�
pH (SU)
_ C
Comments:
0

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N.u. uupL. ivnuu
F E B 2 9 f990
Winston-Salem
Regional Office
------------------- WASTELOAD ALLOCATION APPROVAL
Facility Name:
NPDES No.:
Type of Waste:
Status:
Receiving Stream:
Classification:
Subbasin:
County:
Regional Office:
Requestor:
Date of Request:
Quad:
Request No.: 5537
Roaring River Elementary
NCO038709
Domestic
Existing/Renewal
UT to Yadkin River
WS-III
30701
Wilkes
Winston-Salem
Mack Wiggins
1/4/90
C14NE
-------------------- RECOMMENDED EFFLUENT
EXISTING
summer winter
Wasteflow (mgd): 0.0045 0.0045
BOD5 (mg/1) : 18 30
NH3N (mg/1) : 5 10
DO (mg/1) : 6 6
TSS (mg/1) : 30 30
Fecal coliform (#/100ml): 1000 1000
nH (su) : 6-9 6-9
F0----------------f--
.-I..."....,
SchookECEIVED
MAR
U 6 1990
PERMITS & ENGINEERING
Draina
Su r
7Q10:
0.00
cft
Winter
7Q10:
0.06
cfs
Average
flow:
0.14
cfs
30Q2:
0.08
cfs
LIMITS --------------------------
PROPOSED
summer
winter
0.0045
0.0045
18
30
5
10
6
6
30
30
200
200
6-9
6-9
Toxicity Testing Req.: chronic Ceriodaphnia, QRTRLY @ 99%
---------------------------- MONITORING ------------------------------------
Upstream (Y/N): Y Location:100 ft above effluent
Downstream (Y/N): Y Location:HWY 268 bridge
----------------------------- COMMENTS -------------------------------------
Zero 7Q10. Positive 30Q2. Operating under SOC.
Instream data okay (no discharge June -August).
Possible ammonia and chlorine toxicity. s .(°�� s7-f ti- j.5f 5;p-e& 4w
Renew at existing limits. 1
FaAG',r,y WJU n � UbU4 ao c14s r W, /Z 0 3.17 fO
-R
�-
Recommended by: Date:
Reviewed by
Instream Assessment: 1.�1r� Date: cp- o 7 pi a
Regional Supervisor: Date: 3— 2--
Permits & Engineering: Date: 3 W 4°
RETURN TO TECHNICAL SERVICES BY: MAR 2 8 1990

10/89
Facility Name R6 a •-; &,j River- permit # 1L d 0 3,? 70 9
CHRONIC TOXICITY TESTING REQUIREMENT (QRTRLY)
i The effluent discharge shall at no time exhibit chronic toxicity in any two consecutive toxicity tests,
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 q% (defined as treatment two in the North Carolina procedure
document). The permit holder shall perform quarterly monitoring using this procedure to establish
compliance with the permit condition. The first test will be performed after thirty days from
issuance of this permit during the months of FgA, ✓ . 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 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
P.O. Box 27687
Raleigh, N.C. 27611
Test data shall be complete and accurate and include all supporting cliemical/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 mi►limum
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.
7Q10 _ cfs
Permited Flow a S MGD
IWC% /00
Basin & Sub -basin 03 - v -o t
Receiving Stream Ur-K Va .-
County Gt/,.l%Ps
Recommended by:
Z.za
Date a
**Chronic Toxicity (Ceriodaphnia) P/F at M, FEB� �y/j�, N See Part , Condition _H.

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- --- ------ 3°Q . o g IDS D° VK�/l --
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INSTREAM SELF -MONITORING DATA
MONTHLY AVERAGES
ischaraer:IRaCkann 2,,e, GI�.� ",Z�6___I Permit No.: NC003R'7nq
Receiving
Stream. }., VG�(Jc�.- ��.k,L
Sub -basin: p3 �07-01
Upstream
Location:
„�
Downstream Location-
-�
IAM
Upstream
Downstream
DATE
TEMP
D.O. POD 5
COND
TEMP
D.O. BOD 5
eem -� e-01r,
:.IIEC-89
/I.8
_6_CL—
_
iz.7
�sZ
NOV-89
(v...
/v_ ( — -
70
/0
moo• a
/gip
OCT-89
_AJLa-
r
7—
/ _X
9.
S E P - 8 9
-L�,-
gI-2 -
-�Ez-
__Z_2
ATUG-89
„a
JUL-89
JUN-89---
MAY - 8 9
3
APR-89
��
!p _ ( --
(o
FEB-89
DEC-.88
I TT
JUL-88 --
JU"i-88 -- --
.'.AY-8� - - ---
.,.PP_38 - ---
F E F - 8 8 -- — --- --- --• -
JAN,-88 - -- —
D E C - 8 7 --- - — ---- —.- - -
NOV- 8 7 - --- — ---
OCT-87 -- -
SEP-87 - —`
;'•.UG-87
JUL-87 _ - -
JUN- 8 7 -- -- -
MAY-o7 - -- - -- —
APP-87 -- --- -
FE B - 8 7 - ---- --- --
AN - 8 7 - ---
DEC-86-
NOV-86
O CT - 8 0 - ---- — - --
JN-86 - - --- --- - ---
MAR- 8 6
FEB-86 - -
JAN-86 ----

State of North Carolina
Department of Environment, health, and Natural Resources
Division of Environmental Management
512 North Salisbury Street • Raleigh, North Carolina 27611
James G. Martin, Governor George T. Everett, Ph.D.
William W. Cobey, Jr., Secretary June 1. 1990 Director
Keith Lenderman
Roaring River Elementary School
201 W. Main Street
Wilkesboro, NC 28697
Subject: Chlorine Toxicity
NPDES Permit No. NCO038709
Wilkes County
Dear Mr. Lenderman:
Chlorine, a widely used wastewater disinfectant for the
treatment of coliform organisms, often remains instream in residual
amounts that may prove to be toxic under critical low stream flow
conditions. In the last decade, EPA assessed the potential adverse
effects of chlorine to the aquatic environment and has taken steps to
reduce the impacts through the development of federal criteria. In
1986, EPA recommended that all states have a chlorine standard by
their next triennial review of water quality standards.
In revising its water quality standards in 1989, North Carolina
developed an action level for chlorine of 17 ug/l (freshwater classes
only). In addition, the fecal coliform limit was reduced from 1000
colonies/100 ml to 200 colonies/ 100 ml. Under a new DEM procedure,
dechlorination and chlorine limits are now recommended for all new or
expanding dischargers proposing the use of chlorine for effluent
disinfection. The Division is reviewing chlorine levels from all
existing dischargers as part of their NPDES permit renewal process.
Our records indicate that chlorine from your facility's effluent
discharge is considered toxic to the receiving stream under low flow.
conditions, i.e., the amount of chlorine discharged causes a
violation. of the instream action level for chlorine (17 ug/1) under
7Q10 conditions (the average flow for seven (7) consecutive days
during a ten (10) year period). Action should be taken to reduce the
effluent concentration of chlorine to an acceptable level. Based on
your facility's instream waste concentration of 100% an acceptable
level of chlorine in your effluent is 17 ug/l. If this level is not
feasible, you should consider dechlorination or alternate methods of
disinfection for your facility to ensure that both chlorine and
bacterial limits are met. In addition, if your facility plans to
undertake any phase of construction, dechlorination or alternate
disinfection should be included. However, please note that an
authorization to construct must be obtained from this Division prior
to any alteration to your treatment plant.
Pollution Prevention Pays
P.O. Box 27687, Raleigh, North Carolina 27611-7687 Telephone [phone]

-2-
The Division is currently reviewing its water quality
regulations pertaining to chlorine. In the future, effluent limits
and/or dechlorination may be required of existing facility's with
chlorine problems. If the chlorine levels in your facility's
effluent remain unchanged, a chlorine limit or a whole effluent
toxicity testing requirement may be added to your permit limitations.
Please feel free to call Steve Mauney of the Division's Regional
Office at [phone], if you have any questions or comments
regarding this issue.
Sincerely,
Steve Tedder
Water Quality Section Chief
cc: Winston-Salem Regional Office
Central Files
WLA File