NC0021644_Wasteload Allocation_19910716

NPDES DOCUHENT SCANNING COVER SHEET
NC0021644
La Grange WWTP
NPDES Permit:
Document Type:
Permit Issuance
Wasteload Allocation '
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Correspondence
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
July 16, 1991
This document is printed on reuse paper - ignore any
content on the rewerise side

NPDES WASTE LOAD ALLOCATION
PERMIT NO.: NC0021644
PERMITTEE NAME: Town of LaGrange / Town of LaGrange VAJ
Facility Status: Existing
Permit Status: -R lieDvai— /v!l r!; -i cc,
Major Minor
Pipe No.: 001
Design Capacity: ..Ak9-MG1 0, .qJO M D
Domestic (% of Flow): 100 %
Industrial (% of Flow): 0 %
Comments:
Ch/orint /,;12/7L rt red 5/mac- "// y
/S r ?(t5fi
RECEIVING STREAM: Mosey Creek
Class: C-Swamp NSW
Sub -Basin: 03-04-05
Reference USGS Quad: F 27 SE
(please attach)
County: Lenoir
Regional Office: Washington Regional Office
Previous Exp. Date: 11/30/91 Treatment Plant Class: III
Classification changes within three miles:
Requested by:
Angela Y. Griffin
Prepared by:
Date: 3/25/91
Date: 7////9/
Reviewed by: Oh� 4 c LtkeA-Y - Date: %7/d1 (dig/
Modeler
Date Rec.
#
-,
31 o \
(olS3
Drainage Area (mi2 ) 7. �{� Avg. Streamflow (cfs):
7Q10 (cfs) 0 Winter 7Q10 (cfs) 0 30Q2 (cfs) D, Dg
Toxicity Limits: IWC % Acute/Chronic
Instream Monitoring:
Parameters D. 0 � /tea / 41,- 4166fe f)vr/
Upstream
Location 5-2) _"' ' S ? //
Downstream Location r. "WV/4 o
Effluent
Characteristics
Summer
Winter
BOD5 (mg/1)
67 0
l0. 0
NH3-N (mg/1)
1 . O
1 . SQ
D.O. (mg/1)
‘ . D
G , b
TSS (mg/1)
,3 0. O
30, O
F. Col. (/100 ml)
2,00. 0
at O .O
pH (SU)
(o. 0 0
6-.0 '?. O
TP (/i)
_z.o
0
(Al 6n / I)
me e /1/27v
riftw//en7-
Chlo» /lJ
/7 ate
/Ind
p
LOTTED
Comments: *Qua/-7'zr/ Dte,r,vrfG e f t/Gl. ly $6 4r& .
/QwN,rDg fob clfLo4,AJ WJ. , A/r'4l GZ„r .7Si1&,t'% jfoN� ri,(
poll-TeDNLy l{NT,L- C,r7FC32 : 1) E P4NStonI /5 coMs1..C-1 ' ode-
z� a 15 OW 4 /713.

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
Town of LaGrange/Town
NC0021644
Domestic - 100%
Existing
Modification
UT to Mosely Creek
C-Swamp NSW
030405
Lenoir
Washington Reg. Office
Griffin
3/25/91
F27SE
RECEIVED
WASHINGTON OFFICE
Request # 6153
of LaGrange WVV$I'P
Stream Characteristic:
USGS #
Date:
Drainage Area (mi.2):
Summer 7Q10 (cfs):
Winter 7Q10 (cfs):
Average Flow (cfs):
30Q2 (cfs):
JUN 7
D. E. M.
02.0892.8755
1990
0.44
0.0
0.0
0.53
0.08
Wasteload Allocation Summary
(approach taken, correspondence with region, EPA, etc.)
Facility is expanding to .75 MGD. Ammonia limit was changed in lieu of a toxicity test. Fecal
coliform limit was changed to 200/100 ml. A letter regarding chlorine toxicity should be sent.
Modeling work for this flow at this location was done by Juan Mangles in 1990. Using best
professional judgement, and noting that Mosley Creek is a 50 to 100-acre freshwater swamp made
by downstream beaver dams, Miller (Washington Regional Office) recommends that the discharge
remain in the tributary. As a result of this recommendation, and as a result of the high quality
effluent which normally is discharged from this plant, Technical Support concurs that the outfall
does not need to be moved at this time. However as Mangles noted, DEM may require the •
elimination of discharges to intermittent streams in the future. ru G� C�'�u 6luuIC rnowc.tor1K lrlSh�a.ltik
Special cheAdule Requfen}ents tf? and additional comments from Reviewers:
l'u,dWw�0,4/ cue -
Recommended by:
Reviewed by
Instream Assessment:
Regional Supervisor:
Permits & Engineering:
Durd
Date:
57 8. /1 1 0 1991
Date: `J /
Date: 4I/(I f ( - iu h4 CfL
Date:
RETURN TO 1'bCHNICAL SERVICES BY: RI 0 1991

PARAMETERS
Rxisting Limits:
Wasteflow (MGD):
BOD5 (mg/1):
NH3N (mg/1):
DO (mg/1):
TSS (mg/1):
Fecal Co1. (/100 ml):
pH (SU):
Oil & Grease (mg/l):
TP (mg/1):
TN (mg/1):
Residual Chlorine (14/1):
Recommended Limits:
Wasteflow (MGD):
BOD5 (mg/1):
NH3N (mg/1):
DO (mg/1):
TSS (mg/1):
Fecal Co1. (/100 ml):
pH (SU):
Oil & Grease (mg/1):
TP (mg/1):
TN (mg/1):
Residual Chlorine (1.4/1):
*based on quarterly average
Monthly Average
Summer Winter
0.6 0.6
5.0 10.0
2.0 4.0
6.0 5.0
30.0 30.0
1000.0 1000.0
6.0-9.0 6.0-9.0
monitor
monitor
monitor
monitor
monitor
monitor
Monthly Average
Summer Winter
0.75 0.75
5.0 10.0
1.0 1.8
6.0 6.0
30.0 30.0
200.0 200.0
6.0-9.0 6.0-9.0
2.0*
monitor
mittrieF)e,_
of weekly slb
Limit Changes Due To:
Change in 7Q10 Data
Change in stream classification
Change in wasteflow
Failing toxicity test
Other (new pretreatment info.)
2.0*
monitor
lifer tor. (7 AldiP96911-
pies '1+(141
Parameters Affected
Fecals
NH3 as N
C !L
INSTREAM MONITORING REQUIREMENTS: •
Upstream:
Downstream:
x Location:
x Location:
50 -100 feet upstream of outfall
near mouth of creek
Parameters: Dissolved oxygen, fecal conform, temperature, conductivity

-#6"-.3, •
, /coevo 0,(
1;141j
DF
L0\6"vi-r
Ciiw'e
aw = o-7s
0301./105
ar7-7 �eyCi.
or sus
OZ.D��Z .
570.10=L'. cc5
i,Ji J° = 0- D c,,<
007- o.c
nn r�_f
0 ! mile.,
s4CM

STREAM DATA
INSTREAM SELF -MONITORING DATA
MONTHLY AVERAGES
Discharger: elk 1 ZA 6/1aPT,'74...
Receiving Stream: C tr: r /1/1c5e/C{ L4 .
Upstream Location: 5 1 �1
DATE
Dec-91
Nov-91
Oct-91
Sep-91
Aug-91
JuI-91
Jun-91
May-91
Apr-91
Mar-91
Feb-91
Jan-91
Dec-90
Nov-90
Oct-90
Sep-90
Aug-90
JuI-90
Jun-90
May-90
Apr-90
Mar-90
Feb-90
Jan-90
Dec-89
Nov-89
Oct-89
Sep-89
Aug-89
JuI-89
Jun-89
May-89
Apr-89
Mar-89
Feb-89
Jan-89
TEMP
c
(-1((( ivfo y M cr,
Permit No.
/&L/4.4
Sub -basin:
Downstream Location: 5/e /5/5—
D.O COND. FECAL COLI.
C, NM Alf-
11z0
.
Ir
I;
•
t'
t
kJ' o c-O
N Art.)
M T-
1 M ANTS
I-t
1.
TEMP
D.O.
COND.
FECAL CO
5A(
pJ41.1r
I-fzo
►'
I'
ki
Ccn,iME/
Jrs
t�
Ip
1t
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