NC0025879_Wasteload Allocation_19910530

NPDES DOCUMENT SCANNIN. COVER SHEET
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NC0025879
Robbinsville WWTP
NPDES Permit:
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Report
Speculative Limits
Instream Assessment
(67b)
Environmental Assessment (EA)
Permit
History
Document Date:
May 30, 1991
Thus document is printed on reuse paper - ignore any
content on the resrerse side

NPDES WASTE LOAD ALLOCATION
PERMIT NO.: NC0025879
PERMII'IEE NAME: Town of Robbinsville / Town of Robbinsville W
Facility Status: Existing
Permit Status: Renewal
Major _ Minor
Pipe No.: 001
Design Capacity: 0.630 MGD
Domestic (% of Flow): 100 %
Industrial (% of Flow):
Comments:
Refer : Basinwide / Streamline WLA File
Completed By Permits & Engineering
At Front Of Subbasin
RECEIVING STREAM: Qheoh-River !.•-rvIe/
Class: C-Trout
Sub -Basin: 04-04-02
O4-04-O4
Reference USGS Quad: Robbinsville 149-E
(please attach)
County: Graham
Regional Office: Asheville Regional Office
Previous Exp. Date: 7/31/91 Treatment Plant Class: III
Classification changes within three miles:
Requested by:
Prepared by:
Reviewed by:
Angela Y. Griffin
�t oD ci ('
Date: 4/29/91
Date: 6-2
Date: 5
5
Modeler
Date Rec.
#
A6
4t 3o15t
422-4
Drainage Area (mil t ) // Avg. Streamflow (cfs): 3�0
7Q10 (cfs) if: O Winter 7Q10 (cfs) C • O 30Q2 (cfs)
Toxicity Limits: IWC % 19, Acute/Chronic
ifYr
Instream Monitoring:
Parameters
Upstream Location
Downstream N Location
Effluent C
Characteristics
Summer/alter
BOD5 (mg/1)
30. 0
NH3-N (mg/1)
42-
D.O. (mg/1)
TSS (mg/1)
3o a
F. Col. (/100 ml)
24°0. 0
pH (SU)
6 .0 - 9.0
TP
nreet/D'
Tn/
mon,fY
fisieleaan 41)
. 0
NI
°
ratelm Wilk
Comments:
t
3
1/

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 v' ASTELOAD ALLOCATION
Request # 6224
of Robbinsville WWTP
Town of Robbinsville/Town
NC0025879
Domestic - 100%
Existing
Renewal
Long Creek
C-Tr
040404
Graham
Asheville Reg.Office
Griffin
4/30/91
F3SE
Stream Characteristic:
USGS #
Date:
Drainage Area (mi2):
Summer 7Q10 (cfs):
Winter 7Q10(cfs):
Average Flow(cfs):
IWC (%):
03.5156.1000
1988
11.8
4.0
6.0
35.0
20.0
Wasteload Allocation Summary
(approach taken, correspondence with region, EPA, etc.)
The fecal coliform limit was changed to 200/100 ml. A choice of ammonia limit or a chronic
toxicity test is given.
Special Schedule Requirements and additional co ents from Reviewers:
MAYoR 815/kf' Alocbeiz Mitt: 1.4DD (oltc CALt.61) 5-/7-9/ ii40
ke-644e5-ret) 4m/. o/iA 1-im,T. S/Nc2Ar1(-90
(MDI c4rc s 1 Moivrf{ burr/4 4mms4.m 4 a,) vv piCvios1b c-ilniT.
Recommended by:
Reviewed by
Instream Assessment:
Region isor:
Permits & Engineering:
RETURN TO TECHNICAL SERVICES BY:
Date: 4/30/9/
Date: 511/c
Date:S/ a 3 j 7 L
Date:z3�F,
MAY 3 0 1991
RECEIVED
Water Quality Ssctii
MAY [-191
Asheville Regional Office
Asheville, North Carolina

Existing Limits:
2
PARAMETERS
Monthly Average
Wasteflow (MGD): 0.63
BOD5 (mg/1): 30.0
NH3N (mg/1): monitor
DO (mg/1):
TSS (mg/1): 30.0
Fecal Col. (/100 ml): 1000.0
pH (SU): 6.0-9.0
Oil & Grease (mg/1):
TP (mg/1): monitor
TN (mg/1): monitor
Residual Chlorine (14/1): 29.0
Recommended Limits:
Wasteflow (MGD):
BOD5 (mg/1):
NH3N (mg/1):
DO (mg/1):
Monthly Average
w/NH3 w/toxici
limit test
0.63 0.63
30.0 30.0
4.2 moni ' . r
TSS (mg/1): 30.0 30.
Fecal Col. (/100 ml): 200.0 20 .0
pH (SU): 6.0-9.0 6. ii -9.0
Oil & Grease (mg/1):
TP (mg/1): monitor J onitor
TN (mg/1): monitor onitor
Residual Chlorine (µg/1): 29.0 9.0
Toxicity test: @20%
ol;,ryu:f Ct df,,, i4A) d u.t qb ?etas; b b Gi,YYt,w-,n;a. itnli`cA4`ktr

TOWN OF ROBBINSVILLE WWTP - Allowable Waste Concentrations
Residual Chlorine
Ammonia as NH3
7Q10 (CFS)
4
7Q10 (CFS)
4
DESIGN FLOW (MGD)
0.63
DESIGN FLOW (MGD)
0.63
DESIGN FLOW (CFS)
0.9765
DESIGN FLOW (CFS)
0.9765
STREAM STD (UG/L)
17.0
STREAM STD (MG/L)
1.0
UPS BACKGROUND LEVEL (UG/L)
0
UPS BACKGROUND LEVEL (MG/L)
0.22
IWC (%)
19.622224
IWC (%)
19.62222
Allowable Concentration (ug/I)
86.636457
Allowable Concentration (mg/I)
4.195084
NC0025879
DAG 4/30/91

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