NC0029297_Wasteload Allocation_19910418

NPDES WAS 1E LOAD ALLOCATION
PERMIT NO.: NC0029297
PERMI 1-1'EE NAME: Catawba County Schools / Fred T. Foard High
Facility Status: Existing
Permit Status: Modification
Major Minor
Pipe No.: 001
Design Capacity: 0.02 MGD
Domestic (% of Flow): 100
Industrial (% of Flow): 0
Comments:
REQUESTING A RELOCATION OF THE DISCHARGE POINT
RECEIVING STREAM: usaaaleel.ailtitPotveCreek
Class: C
Sub -Basin: 03-08-35
Reference USGS Quad: E 13 SE (please attach)
County: Catawba
Regional Office: Mooresville Regional Office
Previous Exp. Date: 2/28/94 Treatment Plant Class: I
Classification changes within three miles:
Requested by: Angela Y. Griffin
Prepared by:
sJ%AAA._ s 11f.010AP Reviewed by: (2„,f,t,_
Date:
Date:
3/11/91
Modeler
Date Rec.
#
Si,A.,J
3 (zc c) t
l7A
2
Drainage Area (mi ) 3, 61 Avg. Streamflow (cfs): 4. -54
7Q10 (cfs) 0.0101 Winter 7Q10 (cfs) '3C 30Q2 (cfs)
Toxicity Limits: IWC % Acute/Chronic
Instream Monitoring:
Parameters
Upstream Location
Downstream Location
Effluent
Characteristics
Summer
Winter
BOD5 (mg/1)
3o
30
NH3-N (mg/1)A.T. '-"
25. 9 1,01)
— N o L --
D.O. (mg/1)
TSS (mg/1)
30
30
F. Col. (/100 ml)
Zoo
Zoo
pH (SU)
VAIL`4
`-9 ( MAX)
C,-9
,d.55i vu.c-la a
rr ac Kno-t,
h� o c) up
t a�v
. bow O Yn.e tciGo
U I( U
6�
ni nTTIfl
Comments:
ii _a Lao

-1-
Facility Name
NPDES No.
Type of Waste
Facility Status
Permit Status
Receiving Stream
FACT SHEET FOR WASTELOAD ALLOCATIONS
:Foard High School
:nc0029297
:100% Domestic
:existing
:modification
potts creek
Stream Classification:c
Subbasin :030835
County :catawba
N. C. DEPT. OF NATr ReALq
RESOURCES ANT!)
COMMUNITY DE'i-- .0P4TENT
uest # 6129
APR — 8 1991
D►VISI"N 9F fIT"1 E:,L1. ANAGE1?SUIT
?J&QRESVILLE REIllaNAL OFFICE
Stream Characteristics:
Regional Office :MRO 7<'rt USGS # est Date
Requestor :A. Griffin
Date of Request :3/11/91
Topo Quad :e13se
Drainage
S umme r
Winter
Average
Area:
7Q10:
7Q10:
Flow:
30Q2:
3.61
0.99
1.36
4.34
sq.mi.
cfs
cfs
cfs
cfs
Wasteload Allocation Summary
(approach taken, correspondence with region, EPA, etc.)
Foard H.S. is currently discharging to a zero flow stream and wishes to
relocate its discharge point to Pott Creek.
Technical Support recommended limits of BOD5=30 mg/1, NH3-N=nol, and
D.O.= 6 mg/1 in the previous WLA. The permit was recorded as BOD5=30 mg/1,
NH3-N=6 mg/1, and D.O.=not. The compliance system also indicates these
limits.
No significant dischargers are proposed or existing within the vicinity
of Foard H.S.
Tub 54h)01, *s &ago y LIAM& ArJ Soc. cite -mall OAS agPc(L1Ep 2 Nho rlonly of 1113-N
8q -Os IS woNFat5 ANcs 114 y War NOT OK OAD TNi Nd3 1N yin rr /iJEi1/44.
Special Scheduled Requirements and additional comments from Reviewers:
Recommended by: 04-s-..t,� /g had
Reviewed by
Instream Assessment:
Regional Supervisor:/)V
Permits & Engineering:
01.,C01-4-
cni„:44)
flPR 1 a*) )991
P lUlfilTS 4 FhJ;!
Date:
RETURN TO TECHNICAL SERVICES BY:
APR 301991
Date:
Date:
Date:
FP No

-2 -
Existing Limits
Wasteflow (MGD):
BOD5 (mg/1):
NH3N (mg/1):
DO (mg/1):
TSS (mg/1):
Fecal Coliform (/100 ml):
pH (SU) :
Recommended Limits
Wasteflow (MGD):
BOD5 (mg/1):
NH3N (mg/1):
DO (mg/1):
TSS (mg/1) :
Fecal Coliform (/100 ml):
pH (SU) :
CONVENTIONAL PARAMETERS
v m it t) ; itwEve-N = k b4. = (n M JL was RELOMMCND6t
Monthly Average Daily Maximum
Summer/Winter
0.02
30/30
6/6
nol
30/30
1000/1000
Monthly Average
Summer/Winter
0.02
30/30
25. 9 (summer only)
30/30
200/200
INSTREAM MONITORING REQUIRMENTS:
Upstream: Location:
Donwstream: Location:
Limits Changes Due To:
Relocation
Ammonia Toxicity
Other
6-9
Daily Maximum
6-9
Parameter(s) Affected
BOD5, NH3-N, D.O.
NH3-N
(explanation of any modifications to past modeling analysis
includidng new flows, rates, field data, interacting discharges, etc.)

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MODEL RESULTS
Discharger : FRED FOARD H.S.
Receiving Stream : UT POTTS CREEK
SUMMER
QEFF=0.02 MGD, BOD5=30
NH3-N=25.9 MG/L
The End D.O. is 7.58 mg/l.
The End CBOD is. 3.11 mg/l.
The End NBOD is 4.19 mg/l.
WLA WLA WLA
DO Min CBOD NBOD DO Waste Flow
(mg/1) Milepoint Reach # (mg/1) (mg/1) (mg/1) (mgd)
Segment 1 7.21 0.00 1
Reach 1 45.00 116.60 0.00 0.02000
5M A5: rot R-D S 1.6 DATPY 3i

*** MODEL SUMMARY DATA ***
Discharger : FRED FOARD H.S. Subbasin : 030835
Receiving Stream : UT POTTS CREEK Stream Class: C
Summer 7Q10 : 0.99 Winter 7Q10 : 1.36
Design Temperature: 25.0
'LENGTH' SLOPE' VELOCTTY 1 DEPTH! Kd 1 Kd 1 Ka I Ka I KN I
I mile 1 ft/mil fps 1 ft 'design' @20' 'design' @20Va 'design'
I I I I 1 I I I I
Segment 1 1 0.481 18.001 0.174 0.63 1 0.37 1 0.29 16.29 1 5.641 0.44 I
Reach 1 1 I I 1 I I I I I
I Flow ► CBOD 1 NBOD 1 D.O.
l cfs 1 mg/1 1 mg/1 ► mg/1
Segment 1 Reach 1
Waste 1 0.031 1 45.000 1116.600 I 0.000
Headwaters! 0.990 1 2.000 1 1.000 1 7.440
Tributary 1 0.000 I 2.000 I 1.000 I 7.440
* Runoff 1 0.000 1 2.000 I 1.000 I 7.440
* Runoff flow is in cfs/mile

SUMMER
QEFF=0.02 MGD, BOD5=30
NH3-N=25.9 MG/L
I Seg # I Reach # I Seg Mi I D.O. I CBOD I NBOD I Flow I
1 1 0.00 7.21 3.31 4.51 1.02
1 1 0.05 7.27 3.29 4.48 1.02
1 1 0.10 7.32 3.27 4.44 1.02
1 1 0.14 7.36 3.25 4.41 1.02
1 1 0.19 7.40 3.23 4.38 1.02
1 1 0.24 7.44 3.21 4.35 1.02
1 1 0.29 7.47 3.19 4.31 1.02
1 1 0.34 7.50 3.17 4.28 1.02
1 1 0.38 7.53 3.15 4.25 1.02
1 1 0.43 7.56 3.13 4.22 1.02
1 1 0.48 7.58 3.11 4.19 1.02
I Seg #.I Reach # I Seg Mi I D.O. I CBOD I NBOD I Flow I