NC0045276_Wasteload Allocation_19950508

NPDES WASTE LOAD ALLOCATION
PERMIT NO.: NC0045276
PERM=E NAME: Brunswick County Board of Education
FACILITY NAME: Waccamaw Elementary School
Facility Status: Existing
Permit Status: Renewal
Major _
Pipe No.:
001
Minor -4
Design Capacity: 0.017 MGD
Domestic (% of Flow):
Industrial (% of Flow):
Comments:
100 %
have been requested from Archives. No other mHe, n,,41ve_
RECEIVING STREAM: ao unnamed tributary to Bear Branch
Class: C-Swamp
Sub -Basin: 03-07-57
Reference USGS Quad: K 24 SE (please attach)
County: Brunswick
Regional Office: Wilmington Regional Office
Previous Exp. Date: 8/31/92 Treatment Plant Class: 1
Classification changes within three miles:
No change within three miles.
Requested by:
Prepared
Reviewed by:� 'dAL(A"
�o�K t6.5 3
Nizich ") Date: 2115/95
Date: mp L t55S
7Da
Modeler
Date Rec.
I #
6e
WICI17A8
2SJr
Drainage Area (mi ) 0.og Avg. Streamflow (cfs): •pg
7Q10 (cfs) O, p Winter 7Q10 (cfs) 0. Q 30Q2 (cfs) O.C.
Toxicity Limits: IWC
Instream Monitoring:
% Acute/Chronic
V
Parameters -f-.pmr�, C1'5W),66 e § iiMAI eol>{bee.t„t t>w,t lt{ey,
Upstream Location 0 lamo ) tW olar d r3c
Downstream Location a+ &,) , eR bj dl E
Effluent
Characteristics
Summer
Winter
BOD5 (m )
5•0
/a.o
NH3-N(mg/1)
Z-o
Ji•v
D.O. (mg/1)
. o
6.0
TSS (mg/1)
3
F. Col. (/100 ml)
Loa
pH (SU)
vm3louaL
Comments:
I rfl an1MJrJS VSari ra< dl� rim<+a�tr

MAR 0 5 1995
FACT SHEET FOR WASTELOAD ALLOCATION
Request # 8259
Facility Name:
Waccamaw Elementary
NPDES No.:
NCO045276
Type of Waste:
Domestic - 100%
Facility Status:
Existing
Permit Status:
Renewal
Receiving Stream:
unnamed tributary to Bear
Branch
Stream Classification:
C - Swamp
Subbasin:
03-07-57
County:
Brunswick
Stream Characteristic:
Regional Office:
Wilmington
USGS #
Requestor:
Nizich
Date:
Date of Request:
2 / 16 / 95
Drainage Area (miz):
0.07
Topo Quad:
K 24 SE
Summer 7Q10 (cfs):
0.0
Winter 7Q10 (cfs):
0.0
Average Flow (cfs):
0.07
30Q2 (cfs):
0.0
IWC (%):
100 %
Wasteload Allocation Summary
(approach taken, correspondence with region, EPA, etc.)
This Permitted was rescinded in September, 1993. Due to the inability of the subsurface
jystem to handle the flow another Permit for a surface water discharge is being requested.
/ )�i-se l.� mJu .5 av c aK 4 jw U55�r7t e is Na# R LL c� h/vf u� hG�t kuP�r
These recommendations reflect current zero flow limits. -�'rvt-zd a i d Qi4,t t f f4a.S a06_
d s4"Te 's najl�ui eowsx- a sus su.�acc
Special Schedule Requirements and additional comments from Reviewers: Ct"�sJO�sa/s yS/tir/�j/e�f.
Recommended bye
Reviewed by
Instream Assessment:
Regional
Permits &
RETURN TO TECHNICAL SUPPORT BY:
_Date: zi rasa.aev. itgs
Date: a.4 �S
i
Date -
Date:
APR 0 1 1995
KAN

2
PARAAMTERS
Monthly Average
Summer Winter
Wasteflow (MGD):
0.017
BODS (mg/1):
5.0
5.0
NH3N (mg/1):
2.0
2.0
DO (mg/1):
6.0
6.0
TSS (mg/1):
30
30
Fecal Col. (1100 ml):
200
200
pH (SU):
6-9
6-9
Residual Chlorine (µg/1):
monitor
monitor
Oil & Grease (mg/1):
not required
not required
TP (mgift
not required
not required
TN (mg/1):
not required
not required
Temperature (°C):
not required
not required
There shall be no discharge of floating solids or visible foam in other than trace amounts.
Recommended Limits:
Monthly Average
Summer
Winter
wQ or EL
Wasteflow (MGD):
0.017
BODS (mg/1):
5.0
10.0
wQ
NH3N (mg/1):
2.0
4.0
wQ
DO (mg/1):
6.0
6.0
A Q
TSS (mg/1):
30
30
Fecal Col. (1100 ml):
200
200
pH (Si):
6-9
6-9
Residual Chlorine (µg/1):
17.0 *
17.0 *
WQ
Oil & Grease (mg/1):
not required
not required
TP (mg/1):
monitor
monitor
TN (mg/1):
monitor
monitor
-T`'b a M a LL •J nJrj ,v o- New
Temperature (°C):
not required
not required
There shall be no discharge of floating solids or visible foam in other than trace amounts.
* If chlorine is used as a disinfectant.
Parameter(s) affected: Limits Changes Due To:
All conventional parameters discharge limits based on treating facility as new
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.
•O
No parameters are water quality limited, but this discharge may affect future allocations.

3
INSTREAM MONITORING REQUIREMENTS
Upstream Location: at least I above discharge
Downstrearntocation: at least 3W below discharge
Parameters: temperature, dissolved oxygen, fecal coliform, conductivity
Special instream monitoring locations or monitoring fi-equencies:
MISCELLANEOUS INFORMATION & SPECIAL CONDITIONS
Adeauacv of� g Treatment
Has the facility demonstrated the ability to meet the proposed new limits with existing treatment
facilities? Yes No
If no, which parameters cannot be met?
Would a "phasing in" of the new limits be appropriate? Yes No
If yes, please provide a schedule (and basis for that schedule) with the regional
office recommendations:
If no, why not?
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) N yes, explain with attachments.

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:
Request # 8259
Waccamaw Elementary - Brunswick County
NC0045276
100 % Domestic
Existing
Renewal
unnamed tributary to Bear Branch
C - Swamp
03-07-57
Brunswick
Wilmington
Nizich
2/ 16/95
K24SE
Existing WLA checked: x
Staff Report:
Topo checked:
USGS Flows confirmed:
IWC Spreadsheet: nr zero flow
Stream Classification:
Nutrient Sensitivity:
Instream Data: na
Stream Characteristic:
USGS #
Date:
Drainage Area (miz):
0.07
Summer 7010 (cfs):
0.0
Winter 7010 (cfs):
0.0
Average Flow (cfs):
0.07
3002 (cfs):
0.0
IWC (%):
100 %
File goes back to 1987 where facility received limits of 5 and 2 all year 'round..
In 1993 this Permit was rescinded and facility tried to go subsurface; problems of supersaturated soils prevented this alternative from
consistently treating their waste. Therefore they have requested re -Instatement of their previous surface water discharge system.
They previously had Advanced Tertiary limits, (i.e. 5 and 2) and I will recommend these again as well as a residual chlorine limit of 17
µgA, (If chlorine is used as a disinfectant - engineer informs me that they may be using UV). The system they are installing works as a
batch system where the effluent from the school is contained in a basin. Then, for an eighteen, (or so) hour period, it is sprayed over
four different sand filter zones, recaptured and sprayed on the next zone until all four zones have been used at which time the effluent is
discharged to the stream, (at approximately 3 am).
The engineer informs me that they can meet whatever limits are called for.
Existing
Monthly Averages
Summer
Winter
Wasteflow (MGD):
0.017
BODE (mgA):
5
5
NH3N (mg/1):
2
2
DO (mg/1):
6
6
TSS (mgA):
30
30
Fecal Col. (A 00 ml):
200
200
pH(SU):
6-9
6-9
Residual Chlorine WAY
monitor
monitor
Oil & Grease (mg/l):
nr
nr
TP (mgA):
nr
nr
TN (mgA):
nr
nr
There shall be no discharge of floating solids or visible foam in other than trace amounts.
Upstream Location: at least 100' above discharge
Downstream Location: at least 300' below discharge
Parameters: temperature, dissolved oxygen, fecal coliform, conductivity