NC0067318_Wasteload Allocation_19920727

NPDES WASTE LOAD ALLOCATION
PERMIT NO.: NC0067318
PERMIT TEE NAME:
FACILITY NAME:
Macon County Board of Education
Nantahala School
Facility Status: Existing
Permit Status: Renewal
Major Minor
Pipe No.: 001
Design Capacity: 0.002 MGD
Domestic (% of Flow): 100 %
Industrial (% of Flow):
Comments:
Refer : Basinwide / Streamline WLA File
Completed By Permits & Engineering
At Front Of Subbasin
RECEIVING STREAM: Partridge Creek
Class: C-Trout
Sub -Basin: 04-04-03
Reference USGS Quad: F4SW (please attach)
County: Macon
Regional Office: Asheville Regional Office
Previous Exp. Date: 12/31/92 Treatment Plant Class: 1
Classification changes within three miles:
No change within three miles.
Requested by: Susan Robson Date: 5/6/92
Prepared by: ,iv Date:
Reviewed by: (Oh Date:
lADqa. c� L-2
Modeler
Date Rec.
#
A-G
S 1 5 z-
(0 ci o'1
�
Drainage Area (mi2 ) L 2 Avg. Streamflow (cfs): /3
7Q10 (cfs) / Winter 7Q10 (cfs) / V 30Q2 (cfs) Z - 6
Toxicity Limits: IWC % Acute/Chronic
Instream Monitoring: /
Parameters lt/2//
Upstream Location
Downstream Location
Effluent
Characteristics
Summer
Winter
BOD5 (mg/1)
30
NH3-N (mg/1)
Yi'IoYtii-�
D.O. (mg/1)
TSS (mg/1)
b
F. Col. (/100 ml)
pH (SU)
6 - I
�py�1i, (°C%
moni 4
..
pLo
k
ED
Comments:/- �trr1�Ii�u'La✓�lvt�/t,r"iS 5%�ll�bc�
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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 RECEIVED
Request # 6907Water Quality S*ctioo
Macon County Board of Education/Nantahala School
NC0067318 J U N 1 7 1992
Domestic - 100%
Existing
Renewal
Partridge Creek
C-Trout
040403
Macon
Asheville
Robson
5/6/92
F4SW
Wasteload Allocation Summary
(approach taken, correspondence with region, EPA, etc.)
Asheville Regional ONO
Asheville. North Carolh,
Stream Characteristic:
USGS #
Date:
Drainage Area (mi2):
Summer 7Q10 (cfs):
Winter 7Q10 (cfs):
Average Flow (cfs):
30Q2 (cfs):
IWC (%):
03.5049.4078
1986
4.2
1.6
1.8
13
2.6
.19
Facility is renewing at existing flow with no change in wastewater characteristics. Facility has
problems meeting the lower limit for pH. Given the large amount of dilution, this does not seem to
be a water quality problem. (It should be noted that Technical Support did not recommend a limit
for pH in the last renewal.) No changes to the existing permit are recommended.
Special Schedule Requirements and additional comments from Reviewers:
z rwC .19 � � H 4,, 3 Te e oat y -op +-.', t e
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Recommended by:
Reviewed by
Instream Assessment:. ,e-fin Date: 6/,515'a
Regional Sup i�or ate.."., Date: • / 4) 2,
Permits & Engineering: Date: V207,
Date: 6 l9/9z
RETURN TO TECHNICAL SERVICES BY: J U L 1 4 1992

Existing Limits:
Wasteflow (MGD):
BOD5 (mg/1):
NH3N (mg/1):
DO (mg/1):
TSS (mg/1):
Fecal Co1. (/100 ml):
pH (SU):
Residual Chlorine (µg/1):
Temperature (°C):
TP (mg/1):
TN (mg/1):
Chronic toxicity test (P/F):
Recommended Limits:
Wasteflow (MGD):
BOD5 (mg/1):
NH3N (mg/1):
DO (mg/1):
TSS (mg/1):
Fecal Co1. (/100 ml):
pH (SU):
Residual Chlorine (µg/1):
Temperature (°C):
TP (mg/1):
TN (mg/1):
Chronic toxicity test (P/F):
2
CONVENTIONAL PARAMETERS
Monthly Average
0.002
30.0
monitor
30.0
6-9
monitor
Monthly Average
0.002
30.0
monitor
30.0
6-9
monitor` 1ertp - ✓Tr Gi `5 5Actfi rth-f htlite,Nased h mow
4-l4a,,1 a6ve. cl at- i S cl //c/t ea6e-exteed
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.
OR
No parameters are water quality limited, but this
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NANTAHALA SCHOOL - Allowable Waste Concentrations
LI__
¢4' SUMMER
Residual Chlorine
> Ammonia as NH3
41
7010 (CFS)
1.6..7Q10 CFS
1.6
DESIGN FLOW (MGD)
0.002 . •.z DESIGN FLOW (MGD)
0.002
DESIGN FLOW (CFS)
0.0031 DESIGN FLOW (CFS)
0.0031
STREAM STD (UG/L)
17.0 STREAM STD MG/L
1.0
UPS BACKGROUND LEVEL (UG/L
0 :err$ UPS BACKGROUND LEVEL (MG/L
0.22
IWC (%)
0.1933753 IWC (%)
0.193375
Allowable Concentration (ug/I
8791.1935 .. Allowable Concentration (mg/I)
403.5806
•LY
{} WINTER
uxa Ammonia as NH3
J7Q10(CFS)
1.8
(MGD) N DESIG ( )
me
0.002
DESIGN FLOW (CFS)
0.0031
. STREAM STD (MG/L)
1.8
• r{ UPS BACKGROUND LEVEL (MG/L)
0.22
`v IWC %
0.171926
..` Allowable Concentration (mg/I)
919.2194
NC0067318
DAG 6/8/92