NC0029602_Wasteload Allocation_19910418

NPDES WASTE LOAD ALLOCATION
PERMIT NO.: NC0029602
PERMITTEE NAME: Yadkin County Board of Education / Forbush
ELet•".E,r S
Facility Status: Existing -'
Permit Status: Modification
Major Minor
Pipe No.: 001
Design Capacity: 0.0025 MGD �WWI
Domestic (% of Flow): 100 %
Industrial (% of Flow):
Comments:
Relocation of discharge point.
NR3-1.) LL/Nur c+ikiittG o14-'4 t3y Pe,IoN 'OW4\ •
RECEIVING STREAM: Mill Branch
Class: C
Sub -Basin: 03-07-02
Reference USGS Quad: C17NW (please attach)
County: Yadkin
Regional Office: Winston-Salem Regional Office
Previous Exp. Date: 1/31/92 Treatment Plant Class: 1
Classification changes within three miles:
No change within three miles.
Requested by: Mack Wiggins Date: 1/17/91
Revtsep
Prepared by: w 16,,,. 9� (,c �t�a-►.� Date:
Reviewed by: �,+..tJ `COLCtRAX2Pn Date:
(4o
LA le
4 N6 9t
Modeler
Date Rec.
SPru )
Drainage Area (mil) 1, ¢, (o
(obl.
Avg. Streamflow (cfs): 1. 8
7Q10 (cfs) 0.1 Winter7Q10 (cfs) p 41 30Q2 (cfs) 0.52
Toxicity Limits: IWC % Acute/Chronic
Instream Monitoring:
Parameters
Upstream Location
Downstream Location
Effluent
Characteristics
Summer
Winter
BOD5 (mg/1)
30
30
NH3-N (mg/1)
ZI 1
—"
D.O. (mg/1)
TSS (mg/1)
3 0
F. Col. (/100 ml)
Zoo
Zoo
pH (SU)
oa 01
l
43 1 wtL 1 r
Cct, C.`
6 O5)0d
UP co-
X>Za
pozakytl1tto
V°
Pi n
rri
Comments:
c.es tzuskC o w-g«t.i 3l �'k� (
9/

Subbasin
County
Regional Office
Requestor •
Date of Request
Topo Quad
Facility Name
NPDES No.
Type of Waste
Facility Status
Permit Status
Receiving Stream
-1-
FACT SHEET FOR WASTELOAD ALLOCATIONS
:Forbush Elementary
:NC0029602
:100% Domestic
:Existing
:Modification
:Mill Branch
Stream Classification:C
:030702
:Yadkin
:WSRO
:M. Wiggins
:1/17/91
:C17NW
School
R ut tm60a4'1`ar`
RECEIVED
N.C. Dept. NRCO
FEB ?8 1991
04fice
Stream Characteristic" '
USGS # est Date
Drainage Area: 1.86 sq.mi.
Summer 7Q10: 0.10 cfs
Winter 7Q10: 0.41 cfs
Average Flow: 1.86 cfs
30Q2: 0.52 cfs
Wasteload Allocation Summary
(approach taken, correspondence with region, EPA, etc.)
Forbush is currently discharging to a zero flow stream. This wasteload
is submitted for the potential relocation of the discharge to Mill Branch
from a UT to Mill Branch. Although the facility has been meeting the
current limits during 9/90-12/90, chronic violations of BOD5 and NH3-N
occurred during the previous school year . Staff report states that the
school treatment facility is well maintained.
In the relocation, a NH3-N limit was implemented based on NH3-N
toxicity. Tech Support recommends this limit(instead of toxicity testing)
since it appears the facility will be able to meet it.
- FACILITY MU. RbLelUE (4.o21Mr LE TER.
Special Scheduled Requirements and additional comments from Reviewers:
Recommended by:
Reviewed by
Instream Assessment:
Regional Supervisor:
Permits & Engineering:
C 'JO Sayv-rt.c )0tiv-1
c'LY_
RETURN TO TECHNICAL SERVICES BY:
QE.Vt5eD 4/Va/9l
Date:Cl
MAR 2 6 1991
Date: c10a 1Gj /
Date:
Date:

Existing Limits
Wasteflow (MGD):
BOD5 (mg/1):
NH3N (mg/1):
DO (mg/1):
TSS (mg/1):
Fecal Coliform (/100 ml):
pH (SU) :
Toxicity:
Recommended Limits
(Oli mill
Wasteflow (MGD) :
BOD5 (mg/1):
NH3N (mg/1):
DO (mg/1) :
TSS (mg/1):
Fecal Coliform (/100 ml):
pH (SU) :
Toxicity:
-2-
CONVENTIONAL PARAMETERS
Caro. VT (NA .Bro-nc )
Monthly Average
Summer/Winter
0.006
15/22
6/13
6/6
30/30
1000
Monthly Average
Summer/Winter
-e-e-06 . ooa5
30/30
9.1 (wormer only}
30/30
200/200
INSTREAM MONITORING REQUIRMENTS: NONE
Upstream: Location:
Donwstream: Location:
Limits Changes Due To:
Instream Data
Ammonia Toxicity
Other
Relocation
Standard change
Daily Maximum
6-9
Daily Maximum
21.1 (su,AnfL) olr-'d w/R 4io.'J 4/.
Parameter(s) Affected
NH3-N (summer)
BOD5, NH3-N
Fecal coliform
6-9
(explanation of any modifications to past modeling analysis
includidng new flows, rates, field data, interacting discharges, etc.)
New model is based entirely on in-house estimated flows from USGS flows.

MODEL RESULTS
Discharger : FORBUSH ELEMENTARY SCHOOL
Receiving Stream : MILL BRANCH
SUMMER
QEFF=0.0025 MGD, BOD5=30 MG/L
NH3-N=21.1 MG/L
The End D.O. is 7.77 mg/l.
The End CBOD is 1.75 mg/l.
The End NBOD is 0.84 mg/l.
Segment 1
Reach 1
Reach 2
Reach 3
WLA WLA WLA
DO Min CBOD NBOD DO Waste Flow
(mg/1) Milepoint Reach # (mg/1) (mg/1) (mg/1) (mgd)
7.16 0.00 1
5fivteD As : Fa2BuS H LBDATA 41
NuM t AUvD WAS 1? (Lu,N 4/&191 B,As60
aN Amyl FiaW INFO Fa.M O Nstwowr
No4 Ni,- SEWN To PE2 rr
45.00
0.00
0.00
7 New Nv-13 -N LAN 17 - ZI . I ""a't (5u M)
L1M Lw,Ai)
csge No1E9 PrrTACI46-p W/ 3/48 wLA)
94.95
0.00
0.00
0.00
0.00
0.00
0.00250
0.00000
0.00000

*** MODEL SUMMARY DATA ***
Discharger : FORBUSH ELEMENTARY SCHOOL Subbasin : 030702
Receiving Stream : MILL BRANCH Stream Class: C
Summer 7Q10 : 0.1 Winter 7Q10 : 0.41
Design Temperature: 25.0
'LENGTH' SLOPE' VELOCITY 1 DEPTH' Kd 1 Kd 1 Ka 1 Ka I KN I
mile I ft/mil fps I ft Idesign l @20,4 Idesign l @20% 'design'
I 1 1 1 1 1 1 1 I
Segment 1 1 0.351 25.001 0.100 10.27 10.44 1 0.35 15.02 1 4.501 0.73
Reach 1 1 I 1 1 I I 1 1 I
1 1 1 I 1 I 1 1 I
Segment 1 1 0.401 8.001 0.118 11.04 1 0.28 1 0.22 1 1.89 1 1.701 0.44
Reach 2 1 1 I I 1 1 1 1 I
1 1 1 I 1 1 I 1 I
Segment 1 I 1.201 8.001 0.163 1 1.30 1 0.28 1 0.23 1 2.62 1 2.351 0.44
Reach 3 I 1 I I 1 I 1 I I
I Flow I CBOD I NBOD I D.O. I
I cfs I mg/1 I mg/1 I mg/1 I
Segment 1 Reach 1
Waste I 0.004 145.000 194.950 I 0.000
Headwaters) 0.100 I 2.000 I 1.000 I 7.440
Tributary I 0.000 1 2.000 I 1.000 I 7.440
* Runoff I 0.030 1 2.000 1 1.000 1 7.440
Segment 1 Reach 2
Waste I 0.000 I 0.000 I 0.000 I 0.000
Tributary I 1.800 I 2.000 I 1.000 I 7.440
* Runoff I 0.000 I 2.000 I 1.000 I 7.440
Segment 1 Reach 3
Waste I 0.000 I 0.000 I 0.000 I 0.000
Tributary I 2.140 I 2.000 I 1.000 1 7.440
* Runoff I 0.120 1 2.000 I 1.000 I 7.440
* Runoff flow is in cfs/mile

I Seg # I Reach # I Seg Mi I D.O. I CBOD
1 1 0.00 7.16 3.60
1 1 0.04 7.18 3.55
1 1 0.07 7.20 3.51
1 1 0.11 7.21 3.46
1 1 0.14 7.23 3.41
1 1 0.18 7.25 3.37
1 1 0.21 7.26 3.32
1 1 0.25 7.28 3.28
1 1 0.28 7.29 3.24
1 1 0.32 7.31 3.20
1 1 0.35 7.33 3.16
1 2 0.35 7.43 2.07
1 2 0.39 7.44 2.06
1 2 0.43 7.45 2.05
1 2 0.47 7.46 2.03
1 2 0.51 7.47 2.02
1 2 0.55 7.48 2.01
1 2 0.59 7.49 2.00
1 2 0.63 7.50 1.99
1 2 0.67 7.51 1.98
1 2 0.71 7.51 1.96
1 2 0.75 7.52 1.95
1 3 0.75 7.48 1.98
1 3 0.87 7.52 1.95
1 3 0.99 7.56 1.93
1 3 1.11 7.60 1.90
1 3 1.23 7.63 1.88
1 3 1.35 7.66 1.86
1 3 1.47 7.69 1.83
1 3 1.59 7.71 1.81
1 3 1.71 7.73 1.79
1 3 1.83 7.75 1.77
1 3 1.95 7.77 1.75
I Seg # I Reach # I Seg Mi I D.O. I CBOD
SUMMER
QEFF=0.0025 MGD, BOD5=30 MG/L
NH3-N=21.1 MG/L
NBOD 1 Flow 1
4.50 0.10
4.40 0.10
4.30 0.11
4.20 0.11
4.10 0.11
4.01 0.11
3.92 0.11
3.83 0.11
3.75 0.11
3.66 0.11
3.58 0.11
1.15 1.91
1.14 1.91
1.13 1.91
1.12 1.91
1.11 1.91
1.10 1.91
1.09 1.91
1.08 1.91
1.07 1.91
1.06 1.91
1.05 1.91
1.03 4.05
1.01 4.07
0.99 4.08
0.97 4.10
0.95 4.11
0.93 4.13
0.91 4.14
0.89 4.16
0.88 4.17
0.86 4.18
0.84 4.20
NBOD I Flow I

NPDES WASTE LOAD ALLOCATION
Facility Status: Existing
Permit Status: Modification
Major Minor
Pipe No.: 001
Design Capacity: 0.00 Mt ] 2Cao
Domestic (% of Flow): 100 %
Industrial (% of Flow):
Comments:
Relocation of discharge point.
PERMIT NO.: NC0029602
PERMITTEE NAME: Yadkin County Board of Education / Forbush
.miCatoo
l
RECEIVING STREAM: Mill Branch
Class: C
Sub -Basin: 03-07-02
Reference USGS Quad: C17NW (please attach)
County: Yadkin
Regional Office: Winston-Salem Regional Office
Previous Exp. Date: 1/31/92 Treatment Plant Class:
Classification changes within three miles:
No change within three miles.
Requested by: Mack Wiggins
Prepared by: r�
l�
Reviewed by:
A.._ (4
(1:11164-18/. 3 (sal13S (W)
Date:
1/17/91
Date: 3/15 'II
Date: `3) i3 t
Modeler
Date Rec.
#
SA-0
11tgiit
(volt
Drainage Area (mi2 ) 1_, $(p Avg. Streamflow (cfs): 1.06,
7Q10 (cfs) 0.1 Winter 7Q10 (cfs) 30Q2 (cfs) D. 5 .
Toxicity Limits: IWC % Acute/Chronic
Instream Monitoring:
Parameters
Upstream Location
Downstream Location
Effluent
Characteristics
Summer
Winter
BOBS (mg/1)
-21 d
\\
.77
o
( 5w►m&�
D.O. (mg/I)
TSS (mg/1)
30
3o
F. Col. (/100 ml)
7O0
-7-00
pH (SU)tc�/
(-1 L mAx
} 6, -9
Comments:
w_

Facility Name
NPDES No.
Type of Waste
Facility Status
Permit Status
Receiving Stream
-1--
FACT SHEET FOR WASTELOAD ALLOCATIONS
:Forbush Elementary School
:NC0029602
:100a Domestic
:Existing
:Modification
:Mill Branch
Stream Classification:C
Subbasin :030702
County :Yadkin
Regional Office :WSRO
Requestor :M. Wiggins
Date of Request :1/17/91
Topo Quad :C17NW
• CH_F D
MAR 1991
b est P '+60�1Q1P,m
RECEIVED
N.C. Dept. NRCD
FEB 281991
Stream CharacteristidA:'oj'al Office
USGS # est Date
Drainage Area: 1.86 sq.mi.
Summer 7Q10: 0.10 cfs
Winter 7Q10: 0.41 cfs
Average Flow: 1.86 cfs
30Q2: 0.52 cfs
Wasteload Allocation Summary
(approach taken, correspondence with region, EPA, etc.)
Forbush is currently discharging to a zero flow stream. This wasteload
is submitted for the potential relocation of the discharge to Mill Branch
from a UT to Mill Branch. Although the facility has been meeting the
current limits during 9/90-12/90, chronic violations of BOD5 and NH3-N
occurred during the previous school year . Staff report states that the
school treatment facility is well maintained.
In the relocation, a NH3-N limit was implemented based on NH3-N
toxicity. Tech Support recommends this limit(instead of toxicity testing)
since it appears the facility will be able to meet it.
F4ULJTV WILL (Z6Cel t C4Lo11./4E LE TE/2.
Special Scheduled Requirements and additional comments from Reviewers:
Recommended
Reviewed by
Instream Assessment:
Regional Supervisor:
Permits & Engineering:
by: //A.44
octA.,(Lt_ AA__rh kahil
Oe0
RETURN TO TECHNICAL SERVICES BY:
LIAR 2 6 1991
VLseP 4,4/91
Date : ...4C(
Date: c4aa lei
Date:
Date: 64,

Existing Limits
Wasteflow (MGD):
BOD5 (mg/1) :
NH3N (mg/1):
DO (mg/1) :
TSS (mg/1) :
Fecal Coliform (/100 ml):
pH (SU) :
Toxicity:
Recommended Limits (ej-y)
Wasteflow (MGD):
BOD5 (mg/1):
NH3N (mg/1):
DO (mg/1):
TSS (mg/1) :
Fecal Coliform (/100 ml):
pH (SU) :
Toxicity:
-2 -
CONVENTIONAL PARAMETERS
(vim UT n0/45ranck.,)
Monthly Average
Summer/Winter
0.006
15/22
6/13
6/6
30/30
1000
Monthly Average
Summer/Winter
0.006
30/30
$.4 (oummoT only} 21.
30/30
200/200
INSTREAM MONITORING REQUIRMENTS: NONE
Upstream: Location:
Donwstream: Location:
Limits Changes Due To:
Instream Data
Ammonia Toxicity
Other
Relocation
Standard change
Daily Maximum
6-9
Daily Maximum
(SumAf.(i) DII-'d w/Rd to
Parameter(s) Affected
NH3-N (summer)
BOD5, NH3-N
Fecal coliform
6-9
(explanation of any modifications to past modeling analysis
includidng new flows, rates, field data, interacting discharges, etc.)
New model is based entirely on in-house estimated flows from USGS flows.

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Discharger
Receiving Stream
MODEL RESULTS
: FORBUSH ELEMENTARY SCHOOL
: MILL BRANCH
SUMMER
QEFF=0.006 MGD, BOD5=30 MG/L
NH3-N=9.4 MG/L
The End D.O. is 7.77 mg/l.
The End CBOD is 1.79 mg/1.
The End NBOD is 0.85 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 6.81 0.00 1
Reach 1
Reach 2
Reach 3
Si f D As Fo(L6u5t1
45.00
0.00
0.00
42.30
0.00
0.00
0.00
0.00
0.00
0.00600
0.00000
0.00000

*** MODEL SUMMARY DATA ***
Discharger : FORBUSH ELEMENTARY SCHOOL Subbasin : 030702
Receiving Stream : MILL BRANCH Stream Class: C
Summer 7Q10 : 0.1 Winter 7Q10 : 0.41
Design Temperature: 25.0
'LENGTH' SLOPE' VELOCITY I DEPTH' Kd I Kd 1 Ka I Ka I KN I
I mile I ft/mil fps I ft Idesign l @204 Idesign l @204 'design'
1 1 1 1 1 1 1 1
Segment 1 I 0.351 25.001 0.100 10.28 10.43 10.34 1 5.02 1 4.501 0.73
Reach 1
1 1 1 1 1 1 1 1 I
Segment 1 1 0.401 8.001 0.118 1 1.04 10.28 10.22 1 1.90 I 1.701 0.44
Reach 2 I 1 1 I I I 1 I I
Segment 1
Reach 3
I I I I I I I 1
1.201 8.001 0.164 11.30 10.28 10.23 12.63 I 2.361 0.44
1 1 1 I 1 1 1 I
I Flow I CBOD I NBOD I D.O. I
I cfs I mg/1 I mg/1 1 mg/1 I
Segment 1 Reach 1
Waste 1 0.009 145.000 142.300 I 0.000
Headwaters) 0.100 I 2.000 I 1.000 1 7.440
Tributary I 0.000 I 2.000 I 1.000 I 7.440
* Runoff 1 0.030 I 2.000 I 1.000 I 7.440
Segment 1 Reach 2
Waste I 0.000 I 0.000 I 0.000 I 0.000
Tributary I 1.800 1 2.000 I 1.000 I 7.440
* Runoff 1 0.000 1 2.000 I 1.000 I 7.440
Segment 1 Reach 3
Waste I 0.000 1 0.000 1 0.000 I 0.000
Tributary I 2.140 I 2.000 I 1.000 I 7.440
* Runoff I 0.120 I 2.000 I 1.000 I 7.440
* Runoff flow is in cfs/mile

I seg # I
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
I Seg # I
Reach
1
1
1
1
1
1
1
1
1
1
1
2
2
2
2
2
2
2
2
2
2
2
3
3
3
3
3
3
3
3
3
3
3
Reach
# I Seg Mi
0.00
0.04
0.07
0.11
0.14
0.18
0.21
0.25
0.28
0.32
0.35
0.35
0.39
0.43
0.47
0.51
0.55
0.59
0.63
0.67
0.71
0.75
0.75
0.87
0.99
1.11
1.23
1.35
1.47
1.59
1.71
1.83
1.95
# I Seg Mi I
I
D.O. I
6.81
6.84
6.88
6.92
6.95
6.98
7.01
7.04
7.06
7.09
7.11
7.42
7.43
7.44
7.45
7.46
7.47
7.47
7.48
7.49
7.50
7.51
7.47
7.52
7.56
7.59
7.62
7.65
7.68
7.71
7.73
7.75
7.77
D.O. I
CBOD
5.66
5.57
5.49
5.40
5.32
5.24
5.17
5.09
5.02
4.94
4.87
2.18
2.17
2.15
2.14
2.13
2.12
2.10
2.09
2.08
2.07
2.06
2.03
2.00
1.98
1.95
1.93
1.90
1.88
1.86
1.83
1.81
1.79
CBOD
SUMMER
QEFF=0.006 MGD, BOD5=30 MG/L
NH3-N=9.4 MG/L
I NBOD I
4.51
4.41
4.31
4.21
4.12
4.03
3.94
3.85
3.76
3.68
3.60
1.16
1.15
1.14
1.13
1.12
1.11
1.10
1.09
1.08
1.07
1.06
1.03
1.01
0.99
0.97
0.95
0.93
0.91
0.90
0.88
0.86
0.85
NBOD I
I
Flow I
0.11
0.11
0.11
0.11
0.11
0.11
0.12
0.12
0.12
0.12
0.12
1.92
1.92
1.92
1.92
1.92
1.92
1.92
1.92
1.92
1.92
1.92
4.06
4.07
4.09
4.10
4.12
4.13
4.15
4.16
4.18
4.19
4.20
Flow I

MODEL RESULTS
Discharger : FORBUSH ELEMENTARY SCHOOL
Receiving Stream : MILL BRANCH
WINTER
QEFF=0.006 MGD, BOD5=30 MG/L
NH3-N= NO LIMIT (20 MG/L)
The End D.O. is 9.77 mg/1.
The End CBOD is 1.94 mg/1.
The End NBOD is 1.01 mg/1.
WLA WLA WLA
DO Min CBOD NBOD DO Waste Flow
(mg/1) Milepoint Reach # (mg/1) (mg/1) (mg/1) (mgd)
Segment 1 9.07 0.00 1
Reach 1 45.00 90.00 0.00 0.00600
Reach 2 0.00 0.00 0.00 0.00000
Reach 3 0.00 0.00 0.00 0.00000
SAVE-d 11.5; WRgusa w

*** MODEL SUMMARY DATA ***
Discharger : FORBUSH ELEMENTARY SCHOOL
Receiving Stream : MILL BRANCH
Summer 7Q10 : 0.1
Design Temperature: 14.0
Subbasin : 030702
Stream Class: C
Winter 7Q10 : 0.41
'LENGTH' SLOPE' VELOCITY 1 DEPTH' Kd 1 Kd 1 Ka 1 Ka 1 KN I
I mile 1 ft/mil fps 1 ft Idesign l @204 Idesign l @204 'design'
I I I 1 1 1 1 I I I
Segment 1 1 0.351 25.001 0.133 1 0.46 10.24 1 0.31 15.27 I 6.011 0.32 I
Reach 1 I I I 1 1 1 1 1 I I
I I 1 1 I 1 1 1 I I
Segment 1 I 0.401 8.001 0.300 1 1.21 1 0.19 1 0.25 1 3.79 1 4.311 0.19 I
Reach 2 1 1 1 1 I 1 I 1 1 I
1 I 1 1 1 1 1 1 1 I
Segment 1 1 1.201 8.001 0.387 1 1.50 1 0.19 10.25 1 3.54 I 4.031 0.19 I
Reach 3 I 1 1 1 I I 1 I I
I Flow I CBOD I NBOD 1 D.O. I
I cfs I mg/1 1 mg/1 I mg/1 I
Segment 1 Reach 1
Waste 1 0.009 145.000 190.000 I 0.000
Headwaters) 0.410 I 2.000 1 1.000 I 9.280
Tributary 1 0.000 I 2.000 1 1.000 I 9.280
* Runoff 1 0.060 I 2.000 I 1.000 I 9.280
Segment 1 Reach 2
Waste I 0.000 I 0.000 1 0.000 1 0.000
Tributary 1 6.190 I 2.000 I 1.000 1 9.280
* Runoff 1 0.000 I 2.000 I 1.000 I 9.280
Segment 1 Reach 3
Waste 1 0.000 I 0.000 1 0.000 I 0.000
Tributary 1 6.410 I 2.000 I 1.000 I 9.280
* Runoff 1 0.000 I 2.000 I 1.000 I 9.280
* Runoff flow is in cfs/mile

WINTER
QEFF=0.006 MGD, BOD5=30 MG/L
NH3-N= NO LIMIT (20 MG/L)
I Seg # I Reach # I Seg Mi I D.O. I CBOD I NBOD I Flow I
1 1 0.00 9.07 2.95 2.97 0.42
1 1 0.04 9.15 2.94 2.95 0.42
1 1 0.07 9.22 2.92 2.92 0.42
1 1 0.11 9.28 2.91 2.90 0.43
1 1 0.14 9.34 2.89 2.88 0.43
1 1 0.18 9.40 2.88 2.85 0.43
1 1 0.21 9.45 2.86 2.83 0.43
1 1 0.25 9.49 2.85 2.81 0.43
1 1 0.28 9.53 2.83 2.78 0.44
1 1 0.32 9.57 2.82 2.76 0.44
1 1 0.35 9.61 2.80 2.74 0.44
1 2 0.35 9.30 2.05 1.12 6.63
1 2 0.39 9.33 2.05 1.11 6.63
1 2 0.43 9.35 2.05 1.11 6.63
1 2 0.47 9.38 2.04 1.11 6.63
1 2 0.51 9.40 2.04 1.11 6.63
1 2 0.55 9.42 2.04 1.11 6.63
1 2 0.59 9.45 2.03 1.11 6.63
1 2 0.63 9.47 2.03 1.10 6.63
1 2 0.67 9.49 2.03 1.10 6.63
1 2 0.71 9.51 2.02 1.10 6.63
1 2 0.75 9.53 2.02 1.10 6.63
1 3 0.75 9.41 2.01 1.05 13.04
1 3 0.87 9.45 2.00 1.05 13.04
1 3 0.99 9.50 2.00 1.04 13.04
1 3 1.11 9.54 1.99 1.04 13.04
1 3 1.23 9.58 1.98 1.04 13.04
1 3 1.35 9.62 1.97 1.03 13.04
1 3 1.47 9.65 1.97 1.03 13.04
1 3 1.59 9.68 1.96 1.02 13.04
1 3 1.71 9.71 1.95 1.02 13.04
1 3 1.83 9.74 1.95 1.02 13.04
1 3 1.95 9.77 1.94 1.01 13.04
I Seg # I Reach # I Seg Mi I D.O. I CBOD I NBOD I Flow I

cc: Technical Support Branch
Permits and Engineering
County Health Dept.
Central Files
WSRO
Date February 8, 1991
NPDES STAFF REPORT AND RECOMMENDATIONS
County Yadkin
NPDES Permit No. NC0029602
PART I - GENERAL INFORMATION
1. Facility and Address:
Forbush Elementary School
Yadkin County Board of Education
P. 0. Box 891
Yadkinville, N. C. 27055
2. Date of Investigation: 01/31/91
� y/1
3. Report Prepared by: David Russell, WSRO
4. Persons Contacted and Telephone Number:
Mark Matthews, WWTP Operator
(919 679-2233 (Work); [phone] (Home)
5. Directions to Site:
From Winston-Salem travel Hwy. 421 west. Cross the
Yadkin River and exit at the first exit - Baltimore
Rd. Travel 0.5 mile to SR 1605, turn right and go
approximately 2 miles to SR 1569. The school is on the
left.
6. Discharge Point - Latitude: 36° 07' 34"
Longitude: 80° 29' 51"
Attach a USGS Map Extract and indicated treatment
plant site and discharge point on map.
USGS Quad No.C17NW or USGS Quad Name Vienna
C15SE Clemmons
7. Size (land available for expansion and upgrading):
Approximately 20 acres
8. Topography (relationship to flood plain included):
The school is located well above the flood plain.

9. Location of nearest dwelling: Greater than 1000 feet
10. Receiving stream or affected surface waters: Mill
Branch
a. Classification: C
b. River Basin and Subbasin No.: YAD 02
c. Describe receiving stream features and pertinent
downstream uses: Woodlands and agricultural
PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. Type of wastewater:
1.00 %
Domestic
Industrial
a. Volume of Wastewater: 0.006 presently permitted
b. Types and quantities of industrial wastewater:
N/A
c. Prevalent toxic constituents in wastewater:
N/A
d. Pretreatment Program (POTWs only): N/A
in development approved
should be required not needed
2. Production rates (industrial discharges only) in
pounds: N/A
a. highest month in the last 12 months
b. highest year in last 5 years
3. Description of industrial process (for industries only)
and applicable CFR Part and Subpart: N/A
4. Type of treatment (specify whether proposed or
existing):
Existing - Septic tank, dosing tank, surface
sandfilter, chlorination, cascade reaeration.
5. Sludge handling and disposal scheme:
Sludge pumped as needed.

6. Treatment plant classification: Class I
7. SIC Code(s) 8211
Wastewater Code(s) 03
PART III - OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction
Grants Funds (municipals only)?
2. Special monitoring requests:
3. Additional effluent limits requests:
4. Other:
PART IV - EVALUATION AND RECOMMENDATIONS
This septic tank surface sandfilter system prwently
discharges into a zero flow stream. This application is for
relocation of the discharge into a positive flow stream.
The system is very well maintained and self -monitor data
September - December 1990 indicates a high quality effluent
has consistently been produced. For the period September -
December 1990, the effluent BOD averaged less than 3/0 mg/1
and the TSS averaged 11 mg/l. The existing system should
consistently meet 30-30 limits. This school is covered by a
SOC. The school has an enrollment of approximately 190
students and staff.
It is recommended that a permit be issued for the
relocation of the discharge, even though visual observations
indicate it is doubtful the effluent, at the existing
discharge point, ever reaches a flowing stream.
LI c
l
Signature of report prcparer
Water Q(i'ality Supervisor

V Y
North Carolina
Division of Environmental Management
Checklist of Facility Components
To be Used In Determing Facility Classification
All information will be printed:/,{
FOR bltiSX /�1�2 2N /4A7
cXoo/
Name of Plant
County , /
Owner or Contact Person �Q C/e No//"' sg�/: 0/7) G 7f — 10/3
Q �+ J Tel
Mailing Address 1• v. LOX $ // /U41#Jv%/�e j' C. 170 r?
Street or P.O. Bo/N Town or 4i ty. •Zi p
Permit Number Information
NPDES Permit No. //C 00 �-TC� 0 Z
Date Issued
State Permit No.
Date Issued .
Rated by act/. .. a
in Responsible Charge
Design Flow of Plant in GPD
eet�
Construction Status
Please Check:
Existing Facility !/
Upgraded Facility
New Facility
If Upgraded or New Facility, Give:
50% Completion Date
100% Completion Date
Regional
Office t4'5 a Date x"'3/-9/
�le1iZb VIAi Grade
io
n
(1) PRETREATMENT UNITS (sec definition No, 34)
(2) DESIGN FLOW 0f PLAIT IN GPO (not applicable to non
Contaminated cooling waters and non -discharging syst.esss)
0 •- 20.000
20.001 •- 50.000
50.001 -- 100.000
100.001 -- 250.000
250.001 •- S00.000
S00.001 •• 1.000.000
1.000.001 -- 2.000.000
2.000.001 (and up) - rate 1 point additional for each 200.000
GPO capacity up to a nastrua of . . . 30
Design Fla (GPO:PRELIMINARY UNITS (see definition No. 35)
(a) Influent Pups (Including air lift)
(b) Bar Screens
or
(c) Mechanical Screens. Static Screens or Cornlnutln9
Devices
(d) Grit Removal or
(e) Mechanical or Aerated Grit Removal
(f PlowMeasuring Device or
(9) instronented f1a Measureeert
Effective
7/1/B)
(3)
Pla
nt Class
POINTS
2
K
3
f
a
10
3
2
1
2
2
IIEY POINTS
(h) Pratr&tlon or Equail:ation 1
(I) Greats or Oil Separators -• Gravity 2
Mechanical 3
A 4 5
(3) Choalcal Conditioning S
(a) PRINART TREATMENT UNITS
((a) Septic Tank (see definition `o. ea) (;�
(D) tent( Tank
(c)j Primary Clarlflert (including sludge air lifts) . 5
(d) Settling Poods or Settling Cants for Inorganic Non-
TortC Materials Invol.1n9 a Discharge to the Surface
raters (Sand. gravel. Stone. and other mining operations
except recreational activities Such as Sea or goldmining) f0
(5) SECO:OART .REATIUIT UNITS
(a) Carbonaceous Stage 20
(1) Aeration - *Sign Purity Oxygen System • • . . 20
Diffused Air System . • • •
Mechanical Air System (axed. floating or rotor) 8
Separate Sludge Reaeration f . . . 3
(11) Trickling Filter - High Rate 5
Standard Rate 5
Packed Tower 10
(11i) Aerated Lagoons 10
(iv) Routing 61o1ogicel Contactors (blodisc). .
(v) Sand Filters (Intermittent biological) . . 2
(.1)) Stabilization Lagoons with Outlet to Stream 5
(01) Clarifier (including sludge air lifts). . . 5
(0) Nitrogenous Stage 20
(1) Aeration - Nigh Purity 0xygea System 20
Diffused Air Systems. . . . . . .
Mechanical Air System (fixed. floating. orrotor)S
Separate Sludge Reaeration
(II) Trickling Filter - Nigh Rate 3 7
Standard Rate 5
PackedTower. __
(Ill) Rotating Biolo9tcal Contactors
ctor (Dlodlsd) /Y2�)
(iv Sand filter (intermittent biological). . .
•
(v Clarifier (Including sludge air lifts) • . •
(6) 1ERi1ART OR ADYANCE0 TREATMENT UNITS
(a) Activated Carbon Reds - With
aregeneration 5
ithCrbon regeneration.
(b) ►e.dered or Granular Activated
regeneration Feed
edn Without 5
With Carbon regeneration15
(c) Ammonia Stripping 5
(d) Chemical Additions
(e) Denitrlficatton Process (separate Process). . . *0
((t) Clcctrodlalysls 5
19) foam Separation 5
(h) ion Emehsnge
•7•
(7)
POINTS
(1) lane 9D . 5
tt 'Of )
P
5
0 i 1 ('S
1
{n} Pott At j 1
(n) le
(o) Re a
(P) SanC or c 5
ITEM
Application 'see definition me. 23a;
(rot aopllca0)t for facilities ruder .• . . . .
lierostreent
Phosphorus lesovil
Polishing Ponds- 7 taout aerat ew
Math aeration
ration - Cascade . .
Oif!;,sed or wt=tioica
Pre•Paetage Unit fo- Rtro•al e' 0i' arc telaSe
Osmosis
rta d.Ye:it filters •• s' ate
ligo Pete .
SLUDGE TREATMENT
(a) Sludge Digestion ta•+i .. Heated . . . .r
Aercw `
Unnea•e,
(D Sludge Stabilization (chemical or :sierra:: . . • 1Z
(c) Sludge Drying Reds 2
(d) Sludge Elutrlatton a
(e) Sludge Conditioner (chemical or theroatl
(f) Sludge Thickener
S j Sludge Gas Utilization (including gas storage). .
(I) Sludge Folding Tant -- Aerated
Non -aerated
(I) Sludge Incinerator (not Including activated carbon 1C
regeneration)
(3) Tacvw Filter. Centrifuge or Filter Press . . . 10
SLUDGE DISPOSAL (including incinerated ash) 2
(a) tagoons
(b) land Application ( v face and subsurface) (set def. 10
23a)
(c) Landf111ed (burial) 5
DISINFECTION
(a1 Pre
D) Postrredeait ,/?�
c) Lott IT+J
(d) Dethlorination
(t) Chlorine or Ozone Generation 35
(f) Radiation
MISCELLANEOUS UN11S
(a) molding Ponds or molding Tanks for Inorganic. aon•toaic
Materials with ro Discharge to Sae Surface Waters 2
(Sludge Iondlin9 facilities for water purification
plants. sand. gravel. crushed stone and other tlmllsr
operations --Sec definition No. 10)
(b) Molding Ponds or holding Tanis for Organic or Toxic
Materials vlth ro Discharge to the surface Waters
(Any mom. valve. or other mechanical control subject
to failure creating a potential for bypass or discharge
from the holding ponds or cants will necessitate a
.lntow classification of Class 1 rewiring a certified
operator).
2
2
•3-
(MISCELLANEOUS UNITS CONTIMUED) POINTS
(c)
(d1 t
t
n1
Molding Pond for Effluent Flow Equalization and/or 5
Su D1sch.arge 3
Effluent imps 2
In -Plant Paps (including air lifts) 3
Stand -Sy Power Supply 3
Thermal Pollution Control Device
Treatment Processes for Removal of metal or Cyanide and
30
other Toxic Materials
42
Total Points
Class 111
Class Iv
CLASSIFICATION
S - 25 Points
26 • S0 Points
51 • 65 Points
66 - Up Points
Facilities having a rating of one through four points. inclusive.
0o not require a certified operator. Classification of all other
feu titles req. comparable grade operator In responsible charge.

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