HomeMy WebLinkAboutNC0041157_1991_19931202i
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Facility Name: Dudley Shoals -S,
Receiving Stream: Upper_ - Lit - tle
County: Caldwell
Reference USGS Quad: Bethlehem
Proposed: Wastewater Treatment
Elevation: 1020 feet MSL
Hydrologic Group:
Date: April 24, 1991
z:hOol' Permit- NCO041157
R J. -\.7er Class: C Sub-Basin: CTB32
Regional Office: Asheville
D13SE, Existing:
Plant discharge
Draina.ge Area:
Design Temperature:
Slope: 50 feet per mile Comments:
Wasteflow
BOD 5
NH 3- N
D.O.
pH
Fecal Coliform
TSS
RECOMMENDED BY:
APPROVED BY:
Regional Engineer:
Dudley Shoals School proposes to relocate
discharge from unnamed tributary of Upper
Little R. to 200 feet below Shuford Mills
NC0035211 (allocation # 3148) on Upper
Little River.
RECOMMENDIED EFFLUENT LIMITS
(gpd) : 4000 gpd--------
(mg/1):
(mg/1):
(mg/1):
(SU)
(/100 ml):
Regional Supervisor:
DATE:
Date:
Date:
Route to Technical Support Group --n-id Permits and Engineering Unit
(Enclosed copy of USC-S '.:.opoqraph.i.,_ -al. map showing location of
discharger)
'610Q0in E.
468 '64 / 20' '7
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3964
�C ^ 4
State of North Carolina
Department of Environment, Health, and Natural Resources
Asheville Regional Office
James G. Martin, Governor Ann B. Orr
William W. Cobey, Jr., Secretary Regional Manager
DIVISION OF FTIVIRONMENTAL MANAGEMENT
WATER QUAL,:TY SECTION
i, ?ay 1, 191�a 1
MEMORANDUM '
TO: Trevor Clements l`,� p 6 1991
Technical Sup oy-c Branch
THROUGH: Forrest R. West:. i_
Water. Quality Re," �upervi sor
FROM: Paul R. White, P. E. �C'C/
Envi. ron-tiental Engn.. deer
SUBJECT: Waste Load Alloczati.on Request
Dudley Shoals Sc: (-_(3ol
NPDES Permit No. INC0041.157
Caldwell County
We are requesting a waste load allocation for the discharge
location described for Dudley Shoals School. If you have any
questions, please call me at 70.4 - 251- -6208.
Enclosure
Interchange Building, 59 Woodfin Place, Asheville, N.C. 28801 • Telephone 704251 -6208
An Equal Opportunity Affirmative Action Employer
11
r~+
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
Dudley Shoals School
NC0041157
Domestic - 100%
Existing
Speculative
Upper Little River
C
030832
Caldwell
Asheville
Request p
thater kaaij #y SectiM
JUN 21 1991
Asheville regional OffiM
Ashaville, North WOO"
Stream Characteristic: estimated from:
USGS # 02.1418.3415
Westall Date:
5/1/91 Drainage Area (mi2):
D13SE Summer 7Q10 (cfs):
Winter 7Q10 (cfs):
Average Flow (cfs):
30Q2 (cfs):
IWC ( %):
and old WLA
1987/1984
27.1
5.7
11.9
35.2
15.7
0.1
�• .. D.. ter. � 1"+ �, $ @w Al
Wasteload Allocation Summaryj
(approach taken , correspondence with region, EPA etc.) 1'
.�UL 2 X991
This was a speculative WLA for the school which currently discharges into a S7Q10 =0 stream.
A level B model was run at secondary limits, showing adequate assimilative capacity in the Upper
Little River.
Fecal coliform limit would be changed to 200/100 ml. No ammonia limit would be assigned.
Special Schedule Requirements and additional comments from Reviewers:
mO ?/ /,45 c- irl/ SEE' PX GE 3_
Recommended by: D/14 Date: 6 l
Reviewed by
Instream Assessment
Regional Supervisor:
Permits & Engineerin
Date: l
-I)CAIAL� Date: C)/
g: Date: 5 —
RETURN TO TECHNICAL SERVICES BY: JUL 18 1991
Existing Limits at UT:
Wasteflow (MGD):
BODS (mg/l):
NH3N (mg/1):
DO (mg/l):
TS S (mg/1) :
Fecal Col. ( /100 ml):
pH (SU):
Residual Chlorine (µg/1):
Oil & Grease (mg/l):
TP (mg/1):
TN (mg/l):
2
CONVENTIONAL PARAMETERS
Monthly Average
Summer
Winter
0.004
0.004
15.0
22.0
8.0
15.0
6.0
6.0
30.0
30.0
1000.0
1000.0
6.0 -9.0
6.0 -9.0
Recommended Limits at proposed site:
Wasteflow (MGD):
BODS (mg/1):
NH3N (mg/1):
DO (mg/1):
TS S (mg/1) :
Fecal Col. ( /100 ml):
pH (SU):
Residual Chlorine (µg/1):
Oil & Grease (mg/1):
TP (mg/1):
TN (mg/1):
Limits Chances Due To:
Change in 7Q10 data
Monthly Average
Summer
Winter WQ or EL
0.004
0.004
30.0
30.0 WQ
monitor
monitor
30.0 30.0
200.0 200.0
6.0 -9.0 6.0 -9.0
Change in stream classification x
Relocation of discharge
Change in wasteflow
Other (onsite toxicity study, interaction, etc.)
Instream data
New regulations /standards /procedures
New facility information
Parameter(s) Affected
Fecal
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.
X'
No parameters are water quality limited, but this discharge may affect future allocations.
3
MISCELLANEOUS INFORMATION & SPECIAL CONDITIONS
Adequacy of Existing 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? FEc -q C.. CcgZ. /FolZ l0?
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?
D ra G go - 4px 9/. Cl- lco&��OS'�
C#,y .BE 1Ns2W"eP /i(/ C.&i n11Vcr1z ( l uii /f D&-rjew z
ekrf- /chit/.
Special Instructions or Conditions
Wasteload sent to EPA? (Major) N (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) If yes, explain with attachments.
3
DUDLEY SHOALS SCHOOL - Allowable Waste Concentrations
SUMMER
Residual Chlorine
Ammonia as NH3
7Q10 (CFS)
5.7
7Q10 (CFS)
5.7
DESIGN FLOW (MGD)
0.004
DESIGN FLOW (MGD)
0.004
DESIGN FLOW (CFS)
0.0062
DESIGN FLOW (CFS)
00062
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 ( %)
0.1086537
1 W ( %)
0.108654
Allowable Concentration (ug /1)
15646.032
Allowable Concentration (mg /1)
718.0968
WI TER
Resi I Chlorine
Ammonia as NH3
7Q10 (CFS
5.7
7010 (CFS)
57
DESIGN FLOWNGD-r
0.004
DESIGN FLOW (MGD)
0.004
DESIGN FLOW
0.0062
DESIGN FLOW (CFS)
0.0062
STREAM (UG /L)
17.0
STREAM STD (MG /L)
18
UPS B KGROUND LEVEL ( !
0
UPS BACKGROUND LEVEL (MG/L)
022
1W %
M.86537
I WC ( %)
0.108654
towable Concentration (u g/1)
15646. 32
Allowable Concentration (m g/1)
1454.381
NC0041157 DAG 6/18/91
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* ** MODEL SUMMARY DATA * **
Discharger : DUDLEY SHOALS SCHOOL Subbasin : 030832
Receiving Stream : UPPER LITTLE RIVER Stream Class: C
Summer 7Q10 : 5.7 Winter 7Q10 : 11.9
Design Temperature: 25.
Segment 1 Reach 2
Waste
Flow
ILENGTHI
SLOPEI
VELOCITY
I DEPTHI Kd I
Kd
I Ka I
Ka I
KN I
--------------------------------------------------------------------------------
I 1.600
I mile I
ft /mil
fps
I ft Idesignl
@20'/2
Idesignl
@20V2 Idesignl
Segment
1
I
1 O.101
I
23.101
0.333
I I I
1 1.08 1 0.40 1
0.32
I I
115.43 1
13.841
0.73 1
Reach
--------------------------------------------------------------------------------
1
1 1
1
7.440
1 1 1
1 1
1
1
Segment
1
I 0.101
23.101
0.336
1 1.09 1 0.40 1
0.32
115.57 1
I
13.971
I
0.73 1
Reach
--------------------------------------------------------------------------------
2
1 1
1
1 1 1
1 1
1
1
Segment
1
I I
I 0.901
I
23.101
0.355
I I I
1 1.14 1 0.40 1
0.32
I I
116.46 1
I
14.761
I
0.73 1
Reach
--------------------------------------------------------------------------
3
1 1
1
1 1 1
1 1
1
1
- - - - --
Segment 1 Reach 2
Waste
Flow
I CBOD I
NBOD 1
D.O.
I
cfs
I mg /l I
mg /l I
mg /l
Segment 1 Reach 1
I 1.600
( 2.000 I
1.000 I
Waste 1
0.008
1 45.000 1
90.000 I
0.000
Headwatersl
5.700
I 2.000 1
1.000 1
7.440
Tributary I
0.000
I 2.000 I
1.000 I
7.440
* Runoff I
1.600
I 2.000 I
1.000 I
7.440
Segment 1 Reach 2
Waste
I 0.006
1 45.000 1
90.000 I
0.000
Tributary
I 0.000
I 2.000 I
1.000 I
7.440
* Runoff
I 1.600
( 2.000 I
1.000 I
7.440
Segment 1
Reach 3
Waste
1 0.000
( 0.000 1
0.000 I
0.000
Tributary
I 0.180
I 2.000 I
1.000 I
7.440
* Runoff
I 1.600
I 2.000 I
1.000 I
7.440
* Runoff flow is in cfs /mile
SUMMER
DUDLEY SHOALS
SCHOOL
PROPOSED DISCHARGE -
6/91
---- - - - - -- MODEL RESULTS
---- - - - - --
Discharger
:
DUDLEY SHOALS SCHOOL
Receiving Stream :
UPPER LITTLE RIVER
----------------------------------------------------------------------
The End
D.O.
is 8.09
mg /1.
The End
CBOD
is 1.95
mg /l.
The End
----------------------------------------------------------------------
NBOD
is 1.03
mg /1.
WLA WLA
WLA
DO Min
CBOD NBOD
DO
Waste Flow
(mg/ 1)
Mi lepoint Reach #
(mg/ 1) (mg/ 1)
(mg/ 1)
(mgd)
Segment
1
- - - - --
7.43
--- - - - - -- - - - - - --
0.00 1
- - -- - - --
--
---- - - - - --
Reach
1
45.00 90.00
0.00
0.00540
Reach
2
45.00 90.00
0.00
0.00400
Reach
3
0.00 0.00
0.00
0.00000
SUMMER
DUDLEY
SHOALS SCHOOL
PROPOSED DISCHARGE - 6/91
I Seg #
I Reach #
I Seg Mi I
D.O. I
CBOD I
NBOD (
Flow I
1
1
0.00
7.43
2.06
1.13
5.71
1
1
0.01
7.45
2.06
1.13
5.72
1
1
0.02
7.47
2.06
1.13
5.74
1
1
0.03
7.49
2.06
1.12
5.76
1
1
0.04
7.51
2.06
1.12
5.77
1
1
0.05
7.52
2.05
1.12
5.79
1
1
0.06
7.54
2.05
1.12
5.80
1
1
0.07
7.56
2.05
1.12
5.82
1
1
0.08
7.57
2.05
1.12
5.84
1
1
0.09
7.59
2.05
1.11
5.85
1
1
0.10
7.61
2.05
1.11
5.87
1
2
0.10
7.60
2.09
1.21
5.87
1
2
0.11
7.61
2.09
1.20
5.89
1
2
0.12
7.63
2.09
1.20
5.91
1
2
0.13
7.64
2.09
1.20
5.92
1
2
0.14
7.66
2.08
1.20
5.94
1
2
0.15
7.67
2.08
1.20
5.95
1
2
0.16
7.68
2.08
1.19
5.97
1
2
0.17
7.69
2.08
1.19
5.99
1
2
0.18
7.71
2.08
1.19
6.00
1
2
0.19
7.72
2.08
1.19
6.02
1
2
0.20
7.73
2.07
1.18
6.03
1
3
0.20
7.72
2.07
1.18
6.21
1
3
0.30
7.82
2.06
1.16
6.37
1
3
0.40
7.90
2.04
1.14
6.53
1
3
0.50
7.96
2.03
1.12
6.69
1
3
0.60
8.00
2.01
1.11
6.85
1
3
0.70
8.03
2.00
1.09
7.01
1
3
0.80
8.05
1.98
1.07
7.17
1
3
0.90
8.07
1.97
1.06
7.33
1
3
1.00
8.08
1.96
1.05
7.49
1
3
1.10
8.09
1.95
1.03
7.65
Seg #
I Reach #
I Seg Mi I
D.O. I
CBOD I
NBOD I
Flow I
WAA
STREAM DATA
INSTREAM SELF - MONITORING DATA
MONTHLY AVERAGES
Discharger plj�lky_�0611'5 Sc,4001 Permit No I J
o5
Receiving Stream Sub -basin
Upstream Location
DATE TEMP DO COND. FECAL COLT
Dec -91
Nov -91
Oct -91
Sep -91
Aug -91
Jul -91
Jun -91
May -91
Apr -91 l
Mar -91 `
Feb -91
Jan -91
Dec -90
Nov -90
Oct -90
Sep -90 /
Aug -90
Jul -90
Jun -90
May -90
Apr -90
Mar -90
Feb -90
Jan -90
Dec -89
Nov -89
Oct -89
Sep -89
Aug -89
Jul -89
Jun -89
May -89
Apr -89
Mar -89
Feb -89
Jan -89
Downstream Location
TEMP DO COND FECAL CO
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