NC0021121_Wasteload Allocation_19890313

NPDES DOCUMENT SCANNINO COVER SHEET
NPDES Permit:
NC0021121
Mount Airy WWTP
Document Type:
Permit Issuance
Wasteload Allocation
a onoConstruct (AtQ
Permit Modification
Speculative Limits
Staff Report
Instream Assessment (67B)
Environmental Assessment (EA)
Permit
History
Document Date:
March 13, 1989
Thies document is printed on reuse paper - more any
content on the reverse side

NPDES WASTE LOAD ALLOCATION
PERMIT NO.: NCOO
FACILITY NAME: C• L 0�
Facility Status: �EXb
B71P !'Gro
(circle one) -
Permit Status: RENEWAL NEW
- (,circle 084 n
Major t[inor,�A!�
i-!
Pipe No:.. 001 ., V.
Desion Capacity (MGD): ek'6'4'n010,6 propo3ad %0046
Domestic (S of Flow): ., 30 _
Industrial (X of Flow): 7r�
Comments:
A r e Keay Z5 fa f4g12AJ ,e.
RECEIVING STREAK: r r f` kv4v-
Class: C'
Sub -Basin: -- 03-0 y-0 10
Reference USGS Quad: JY AA (please attach)
County: SKY
Regional Office: As Fe Me. Re We W1 WS
(cirsle one)
Requested By: Date: a1 yz
Prepared By:��-/���� Date: o /
Reviewed By: late: 3
Par�3 4�e re-901'cfiok
Modeler Date Rec.
C�GtS ► � z a q so �- • � .
Drainage Area (me) Avg. Streamflow (ifs): (76
7Q10 (cfs) Winter 7Q10 (cfs)L30Q2 (cfs)
Toxicity Limits: IWC S (circle one) Acute / Chroni
Instream Monitoring:
Parameters QQCa�JCy z�y�st�,pbl;�//
Upstream _y_ Location 0joQg d iyj"0 e:±
Downstream Location ►s "I't r�utHrP
w�`�n 5{etc�v�s rem
a"G•0 �/1u:Lcoobcvn�l��ai�Ct��(�e�tte
WI A coddle Cr ee
Effluent
Characteristics
SUY�� 1��h
�' C t Wil t,',
SODS (mg/0
3 6
NHg-N (mg/0
�3 _
D.O. (mg/1)
_
TSS (mg/1)
3U 6c)
F. Col. (/100m1)
jQ(�p p0 0
PH (SU)
-�
J
C' COliYt r1t2/��
l Ueui inon,6r,'na
r�
Lead 6,nC3 CV I
ercGru ,
Comments:__

i
MI
mEmo.
l DATE: J �'
TO: ,t'/�?� SUBJECT:
a S� 4D 101 7/-
2-7
I
�lW,11'7 Q 4,57� 7�,�-1 �t
F 1E 8 2 o .4
STA1E s L fib
North Carolina Depa %6n' t of Natural
Resources &Community Development

Request No. :5048
--------------------- WASTELOAD ALLOCATION APPROVAL FORM ---------------------
RECEM
Permit Number NCO021 121 N.C.
Facility Name
CITY OF MOUNT
AIRY
Type of Waste
70% INDUSTRIAL
/ 30% DOMESTIC
,Status
EXISTING (expa.,s,te'V -.�0&?
Receiving Stream
: ARARAT RI E
Stream Class
: C
Subbasin
: 030703
'County
: SURRY
Drainage Area
Regional Office
: WSRO
Average Flow
Requestor
: LULA HARRIS
Summer 7010
Date of Request
: 1/12/89
Winter 7Q10
Quad
: B16NE
3002
RECOMMENDED EFFLUENT LIMITS
FF6 052 aC,
r Dal Max
•
Summer
Wastef1ow
(mgd):
7.0
7.0
5-Day BOD
(mg/1):
30
30
Ammonia Nitrogen
(mg/1):
13
Dissolved Oxygen
(mg/1):
5
TSS
(mg/1):
30
30
'"ecal Coliform (#/100ml):
1000
1000
pH
(SU):
6-9
6-9
'I'd
(ug/1):
4.
(ug/1) :
11 .q
,BAN' 3 Mt
Winston-Salem
Regional Office
(sq mi)
: 75.2
(cfs)
: 90.0
(cfs)
: 14.9
(cfs)
31.
(cfs)
: 33
---------- :--•------------
�
GJ 5o
eKis�°
30
30 tir _I
omi
1000
6-9
_--------------------------------- MONITORING---------------------------------
Jpstream (Y/N). Y Location: ABOVE DISCHARGE POINT
)ownstream (Y/N): Y Location: 1-1.0 MILE DOWNSTREAM BEFORE CONFLUENCE W/Jj�v&P66re9,K
a - & - o miles down5hw& be-l^ore Cap;laehte W/ (.addle er&*1<
----------------------------------- COMMENTS ----------------------------------
3ECOMMEND EFFLUENT MONITORING FOR COPPER, NICKEL, LEAD, ZINC, AND MERCURY
RECOMMEND INSTREAM MONITORING FOR DO, CONDUCTIVITY, FECAL COLIFORM,
TEMPERATURE, BOD5, AND AMMONIA.
REQUENCY: 3/WEEK FOR SUMMER (APR-OCT) AND MONTHLY FOR WINTER (NOV--MAR)
'EE ATTACHED TOXICITY TESTING REQUIREMENTS
Recommended by -_-
Reviewed by:
Tech. Support Supervisor
Regional Supervisor
Permits & Engineering
Date 07�91__
�1 g
Date
'-�'--L -M — DateL`� ` --
- -- -- - ------ Date
RETURN TO TECHNICAL SERVICES BY __FEB_1$ 1�b

Facility Name (—(�UQ D c Permit # &000?J /off I
CHRONIC TOXICITY TESTING REQUIREMENT (QRTRLY)
The effluent discharge shall at no time exhibit chronic toxicity in any two consecutive toxicity tests,
using test procedures outlined in:
l.) The North Carolina Ceriodaphnia chronic effluent bioassay procedure (North Carolina Chronic
Bioassay Procedure - Revised *February 1987) or subsequent versions.
The effluent concentration at which there may be no observable inhibition of reproduction or
significant mortality is -'�2 % (defined as treatment two in the North Carolina procedure
document). The permit holder shall perform auarterh monitoring using this procedure to establish
compliance with the permit condition. The first test will be erforned after thirty dms from
ssuance, of this permit during the months of J _�¢�C� Ul, AGE Effluent
sampling for this testing shall be performed at the NIP ES permitted final effluent discharge below
11 treatment processes.
All toxicity testing results required as part of this pernit condition will be entered on the Effluent
Discharge Monitoring Form (MR-1) for the month in which it was performed, using the parameter
code TGP3B. Additionally, DEM Foam AT-1 (original) is to be sent to the following address:
Attention: Technical Services Branch
North Carolina Division of
Environmental Management
P.O. Box 27687
Raleigh, N.C. 27611
Test data shall be complete and accurate and include all supporting chemical/physical measurements
performed in association with the toxicity tests, as well as all dose/response data. Total residual
chlorine of the effluent toxicity sample must be measured and reported if chlorine is employed for
disinfection of the waste stream.
Should any single quarterly monitoring indicate a failure to meet specified limits, then monthly
monitor rig w 11 begin immediately until such time that a single testis passed. Upon passing, this
:monthly test requirement will revert to quarterly in the months specified above.
Should any test data from this monitoring requirement or tests performed by the North Carolina
Division of Environmental Management indicate potential impacts to the receiving steam, this
permit may be re -opened and modified to include alternate monitoring requirements or limits.
VOTE: Failure to achieve test conditions as specified in the cited document, such as minimum
control organism survival and appropriate environmental controls, shall constitute an invalid test
and will require immediate retesting(within 30 days of initial monitoring event). Failure to submit
suitable test results will constitute noncompliance with monitoring requirements.
;Q10 /• q cfs
Permited Flow '1. d MGD Recommended by:
IWC% 421 %
Basin & Sub -basin Ao 3 �/,,•-_ _ J
Receiving Stream Arta Xi ?ii ye✓
County SfIYYU -- Date ) X 7
Chronic Toxicity (Ceriodaphnia) P/F at,
_�Z%, lan, + !#1 Ozef , See Part 3 , Condition

DIVISION OF ENVIRONMENTAL MANAGEMENT
March 9, 1989
Memorandum
To: Permits & Engineering
From: Carla Sanders
Through: David Vogt
Trevor Clements
Re: Additional Recommendations for
Permit Renewal of NC0021121
Mt. Airy Wastewater Treatment Plant
The NPDES permit for the City of Mount Airy's expansion
should include two separate limitation pages. One page should
contain the existing limits for a wasteflow of 4.0 MGD. The
other page of the permit should contain the new limits pertaining
to the proposed expansion of 7 mgd. The "Header" for this second
page should contain the phrase, "Upon expansion and upon achiev-
ing compliance with whole -effluent toxicity limitations..." in
order to assure compliance prior to the expanded discharge.
If you have any questions considering this matter, please
let met know.

DIVISION OF ENVIRONMENTAL MANAGEMENT
March 6, 1989
Memorandum
To: Abner Brady
From: Carla Sanderson
Through: David Vogt'U ZG
Trevor Clements t
Subject: Mt Airy WWTP
NPDES Permit No. NCO021121V Surry County
Additional Recommendations for Expansion
In your memo sent February 17, 1989, you expressed the
Region's reservations with regard to toxicity problems at the Mt.
Airy facility. Technical Services has addressed these concerns
in the final wasteload allocation for the expansion. The permit
shall have two limitation pages - one page containino the exist-
ing limits and wasteflow with the requirement that the facility
may not exceed this wasteflow (4.0 mgd) until they are in com-
pliance.with their whole -Effluent toxicity testing requirement.
The other limitation page in the permit shall contain the newly
proposed expansion and corresponding limits.
In addition, Technical Services recommends that any desired
toxicity evaluations of Quality Mills' influent be.h�sndled via
administrative letter (from your office) rather than by a permit
condition.
If you have any questions regarding this matter, please con-
tact me at 733-5003, ext._514.
cc:.-WLA File
Central Files

�1 �ec� L,�✓�u �
I
th
30
�YYtS
Q30?L
covx�CJ��uOw�,,
a-@ G. o - �J6u5-n,�7iucv�r✓
iN_LY'yv %CX�Q_.
J
��
i'

WINTER
MODEL USING
NORMAL BACKGR DO
AND
OCONNER
DOBBINS,
& SOD
---------- MODEL RESULTS ----------
Discharger
:
CITY OF MOUNT AIRY
Receiving Stream :
----------------------------------------------------------------------
ARARAT RIVER
The End
D.O.
is 7.94
mg/l.
The End
CBOD
is 9.80
mg/l.
The End
----------------------------------------------------------------------
NBOD
is 13.41
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
5.37
0.00 1
Reach
1
60.00
90.00
0.00
7.00000
Reach
2
0.00
0.00
0.00
0.00000
Reach
3
0.00
0.00
0.00
0.00000
Reach
4
0.00
0.00
0.00
0.00000
Reach
5
45.00
90.00
0.00
0.01B00
Reach
6
0.00
0.00
0.00
0.00000
Reach
7
0.00
0.00
0.00
0.00000

PRETREATMENT HEADWORKS REVIEW v2.0 (1/9/89)
--------------------------------
Discharger: CITY OF MT AIRY 01/17/89
Receiving stream: ARARAT RIVER
Stream class: C
7010: 1.4.900 Us
Desigo flow; 7.000 mgd
Actual flow: 7 mgci
Percent industrial: 70.00
IWC: 42.1 '4
Actual
Actual
Allowable
Domestic
Indu=_trial
Pollutant
Standard/AL
Removal
Load
Load
Load
(mg/1)
Eff.
(lbs/day)
(lbs/day)
(l.bs/clay)
Cadmium
0.002
S
92%
3.47
0.250
0.160
Chromium
0.05
.-
76%
28.90
0.020
0.260
Copper-
0.015
AL
82%
11..56
0.270
3.600
Nickel,
0,05
,
327.
i . 100
0.(_20
0.590
Lead
0.025
S
81%
18.26
0.090
0.940
Zinc
0.05
AI_
77%
30.16
0.330
3.120
Cyanide
0.005
S
59%
1..69
0.010
0.220
Mercury
0.0002
S
86%
0.20
0.000
O.008
Silver-
0.01.
AI_
94%
23.1.2
0.010
0.009
Total
Predicted
Allowable
influent-,
Background
Effluent
Effluent
Load
Reserve
Conc
Conn_
Conc
(lbs:/day)
(lb5day)
(mg/1)
(mg/1)
(mg/1)
Cadmium
0.41
3.06
0
------
0.0006
L
------
0.004
Chromium
0.23
28.62
0
0.0012
0.1.187
Copper
8.87
7.69
0
0.0119
M
0.0356
Nickel
0.61
9.59
0
0.0071
M
0.1.187
Lead
1..03
17.23
0
0.0034
M
0.0593
Zinc-,
Cyanide
3.45
0.2:3
26.71
1.46
0
0
0.0136
0.0016
M
I._
0.11B7
0.0119
Mercury
0.01.
0.19
0
0.0000
M
0.0005
Silver
0.02
23.1ii
0
0„0000
0.023f7

� � 'rbt-Bch-1-P rw �. -�✓ (,w„u,� ��
Facility Wastef164 (MGD) VAJ
Summery/Winter (circle one) - - Q
3(
ID
E1
NH3-N (mg/1)
Potential effluent limit combinations:
BDDS NH3.N — C3bP
JD
as IS
Comments:

SUMMER
AT 7 MGD BOD5=30, NH3N=13, 5DO
SOD, UPSTR DO=5.55, O'CONNF_R-D
-------------- MODEL RESULTS --------
Discharger : CITY OF MOUNT AIRY
Receiving Stream : ARARAT RIVER
-----------------------------------------------------
The End D.O. is 5.45 mg/l.
The End C»OD is 8.82 mg/l.
The End NEOD is 7.36 mg/l.
---------------------------------------------------------------
Segment 1
Reach 1
Reach 2
Reach 3
Reach 4
Reach 5
Reach 6
Reach 7
WLF;
WLA
DO Min CBDD
NDOD
(mg/1) Milepoint Reach # (mg/1)
(mg/1)
5.01. 0.26 1.
60.00
58.50
0.00
0.00
0.00
0.00
0.00
0.00
45.00
40.00
0.00
0.00
0.00
0.00
ups �ea� -(-') c) 5-5-
See P. (-,& 1ViOcc { K.n
violes wiadkl ru..-\
i^vr G��/4o ruti
WLA
DO
Waste Flow
(mg/1.)
(mgd)
5.00
7.00000
0.00
0.0000o
0.00
0.00000
0.00
0.00000
0.00
0.01800
0.00
0.00000
0.00
0.00000 )I_ 000

* *.x MODEL- SUMMARY DATA ***
Discharger : CITY OF MOUNT AIRY Subbasin : O3U7i)3
Receiving Stream : ARARAT RIVER Stream Class: C
Suninler 7010 . 14.9 Winter 7QIO : 31.
Design Temperature; 25.
ILENGTHI
SLOPEI
VELOCITY I
DEPTHI K.d I
Kd
I Ka 1
Ka ! KN I
KN
I KNR I
KNR I
-----------------------------------------------------------------------------------------------------
I mile I
ft/mil
fps
I ft idesigni
a201
Idesignl
d201 IdE5ignl
a201
IdeSinnl
a20' 1
Segment 1
I I
1 0.261
I
8.201
0.540 1
I I I
1,78 1 0.33 1
0.26
I I
1 4.44 1
I I
3.981 0.44 1
0.30
I I
1 0.44 1
I
0.0i1 I
Reach I
-----------------------------------------------------------------------------------------------------
I I
I
I I I
I I
I I
1 I
I
Segment 1
I !
1 0.721
I
8.201
0.589 1
I I I
1.90 1 0.33 1
0.26
I I
1 3.95 1
I I
3.51 0.44 1
0.30
I i
1 0.44 1
I
0.00 1
Reach 2
1 1
1
1 1 1
1 1
1 1
1 1
!
I I I I I I I I I I I I I
Segment I 1 1.201 8,201 0.720 1 2.33 1 0.33 1 0.26 1 3.43 1 3,081 0.44 1 0.30 1 0.44 1 0.00 1
Reach 3 1 1 1 1 1 1 1 1 1 1 1 1 1
I I I I I I I I I I I I I
Segment 1 1 2.201 8.201 0.7H 1 2.36 1 0.33 1 0.26 1 3.38 1 3.031 0.44 1 0.30 1 0.44 1 0.00 1
Reach 4 1 iI I I I I I I I I
I I I I I I I I I I I I I
Segment 1 1 1.651 8.201 0,732 1 2.36 1 0.33 1 0.26 1 3.38 1 3.031 0.44 1 0.30 1 0.44 1 0.00 1
Reach 5 1 1 1 1 1 1 1 1 1 1 1 1 1
-----------------------------------------------------------------------------------------------------
I I I I I I I I 1 1 1 1 1
Segment 1 1' 2.101 10.501 0.730 1 2.30 1 0.35 1 0.28 1 3.67 1 3.271 0.44 1 0.30 1 0.44 1 0.00 1
Reach 6 1 1 1 1 1 1 1 1 1 1 1 1 1
-----------------------------------------------------------------------------------------------------
I I I I I I I I I I I I 1
Segment 1 1 1.501 10.501 0.800 1 2.33 1 0.35 1 0.23 1 3.62 1 3.251 0.44 1 0.30 1 0.44 1 0.00 1
React, 7 1 1 1 1 1 1 1 1 1 1 1 1 1
I
Flow I
CROD
I NF30D I
D.O. I
I
cfs I
ina/1
I rng/1. 1
mg/1. 1
:Segment 1. Reach 1
Waste 1
1.0.851) 1
f 0 C-)0
1 58.500 1
5.0OO
!-leadwaters1
14.90O 1
2.0(-)(-)
1 1.000 1
5.550
-Tributary I
0.00)i) 1
2.000
1 1.VOU 1
7.440
* RUnot'f I
0.080 1
2.O()p
I I.00C) 1
7.4'1C)
Segment I Reach 2
WaS'te
1 0.`•_UO !
O.t)i)r.) I
.).0V0 I
0.V_)(-)
Tributary
I 8.900 1
2�C1OO 1
1..0VO 1
7.440
* Runoff
1 0.09i) 1
2.000 1
1.(X)i) 1
?egment 1
Reach 3
Waste
I C1„C) i
i).Ot-)(-) I
C),OiO I

Ii1VucaYy
1 =M.OlV
I C. ••
I L.UWW I
1..11•,
* Runoff
1 0,380
1 2.000
1 1.000 1
7.440
Segment 1
Reach 4
Waste
1 0.000
1 0.000
1 0.000 1
0,000
Tributary
1 0.800
1 2.000
1 1.000 1
7.440
* Runoff
1 0.580
1 2,000
1 1.000 1
7.440
Segment 1
Reach 5
Waste
1 0.028
1 45.000
1 90.000 1
0,000
Tributary
1 0,000
1 2.000
1 1.000 1
7.440
* Runoff
1 0.580
1 2.000
1 1.000 I
7.440
Segment 1
Reach 6
Waste
1 0.000
1 0.000
1 0.000 1
0.000
Tributary
1 0.380
1 2.000
1 1.000 1
7.44ir
* Runoff
1 0.380
1 2.000
1 1.000 1
7.440
Segment 1
Reach '7
Waste
1 0.000
1 0.000
1 0,000 1
0.000
Tributary
1 0.770
1 2.000
1 1.000 1
7.440
* Runoff
1 1.700
1 2.000
1 1.000 1
7.440
* Runoff flow is in cfs/mi.le

,#Imac,#Ieq
mI
GsI
cm
!
!
0.00
5.32
26.44
!
!
ome
5m9
26.02
I
I
0.04
5.27
26.40
!
!
0.06
5.24
26.39
I
I
cm
wz
ewm
!
!
a ao
5.19
26.33
!
!
oaa
5.17
3!
!
!
«w
5.3
e6.29
I
!
0.16
5.12
a,
!
!
wm
sw
:wq
I
!
«m
wm
Wig:
!
!
m::
y«
e621
I
!
mm
--a
26.19
!
I
m
26.16
!
2
0.e6
5.64
19.96
!
e
mm
ws
1933
I
e
«m
y:w
aso
!
2
«m
wq
193e
I
2
0.42
s:o
19.25
!
e
0.46
5.47
19.82
I
e
0.+
5.44
19.79
!
e
0.54
5.41
lw=a
!
e
«m
5.37
1933
!
e
C).62
Gas
19.70
I
e
0.66
saa
19.
!
e
«m
5.e9
Ras
I
e
(-).74
se:
19.62
!
e
m =e
5.
19.59
!
e
0.82
5.20
19.=
I
e
0.86
5.18
19.53
I
a
0.
5.15
19.51
I
e
oaa
5.13
w »e
!
a
0.
19.45
!
:
0.98
6.05
12.39
!
a
!»e
5.97
12.31
!
a
!ae
5.90
12.22
I
a
1.53
5.93
12.14
!
a
12e
5.77
12.06
!
a
!ae
5.71
lc;o
!
a
exe
5.66
ii.90
!
a
»!e
5.6B
11.77
!
«
2.38
5.63
11.63
!
a
mm
sm
cao
!
«
2.78
5.54
11.=
I
a
a+
5.51
11.43
I
«
3.18
5.47
11.35
!
a
wm
5.44
em,
!
6
±!e
s&!
11.19
!
«
3.78
5.39
11.11
I
a
3.98
5.36
c,m
!
a
,xe
5.94
10.95
!
a
age
sae
10.89
!
s
awe
was
10.99
!
s
4.43
5.32
10.87
I
s
4.40
5.31
Imes
!
s
«q
wg
109a
1
s
Rm
Gm
!wm
1
5
Li.63
wm
!cm
SUMMER
AT , Ao mm=G ma_a,sm
mG +ST;mqa% ccmwm-D
mm I mew 1
Ja 25.75
.i 25.75
25.15 25.75
25.12 25.76
=.10 25.76
25.07 eye
25.04 25.76
25.02 25.76
24.99 26
24.96 25.77
24.94 ewe
ma.1 25.77
24.99 25.77
lm,s awe
18.72 34.67
a,m 34.63
18.65 +.s
18.61 34.6R
e 3; 34.69
18.54 34.69
10.50 34.69
19.47 m.m
±aa awm
!E40 m.
±.36 34.71
18.33 34.71
18.29 a«g
18.26 34.72
13.22 34.72
18.19 34.72
18.15 34.73
19.12 34.73
11.19 se as
11.09 58.40
11.00 59.49
10.90 58.56
10.81 50.63
10.72 58.71
10.62 :m76
10.50 59.58
10.40 59.70
10.30 59.82
10.21 59.93
10.12 60.05
1060.16
9.93 60.28
«m amm
9.;s 60.51
9.66 60.63
9.57 60.74
9.49 ammo
9.2 60.89
9.50 60.92
wq 60.95
9.46 ao ae
9.44 61.m
9.42 alma

1 5
4.73
5.29
10.76
9.37
61.09
1' 5
4.78
5.29
10.74
9.35
61.12
1 5
4.83
5.29
10.,72
9.33
61.15
1 5
4.98
5.28
10.70
9.31
61.18
1 5
4.93
5.28
10.6B
9.29
61..21
1. 5
4,98
5.2B
10.66
9.27
61..24
1 5
5..03
5.27
10.64
9.25
61.27
i 5
5.08
5.27
10.63
9.23
61.29
i 5
5.13
5.27
10..61.
9.20
61.32
1 5
5.1B
5.27
10.59
9.18
61.35
i 5
5.23
5.26
10.57
9.1.6
61.39
i. 5
5.29
5.26
10.55
9.14
61.41
1 5
5.33
5.26
10.53
9.12
61.44
1 5
5.30
5.26
10,51
9.10
61.47
1 5
5.43
5.25
1.0.49
9.03
61.50
1 5
5.48
5.25
1.0.4B
9.06
61.53
1 5
5.53
5.25
10.46
9.04
61.56
1. 5
5.58
5.25
1.0.44
9.02
61.58
1 5
5.63
5.25
10.42
9.00
61..61,
1. 5
5.6B
5.25
10.40
8.98
61.64
i 5
5.73
'^5.24
10.30
8.96
61.6'7
i 5
5.78
5.24
10.37
8.94
61.70
1 5
5.83
24
10.35
3.92
61..73
1. 5
5.23
5.24
10.33
8.90
61.76
1 5
5.93
5.24
10.31
8.98
61.. 79
1 5
5.98
5.24
10.29
8.86
61.82
1. 5
6.03
5.24
10.28
8.04
61..85
i. 6
6.03
5.25
10.22
8.79
62.23
1 6
6.13
5.25
10.19
8.76
62.26
1 6
6.23
5.25
10.16
8.72
62.30
1 6
6.33
5.26
10.13
8.69
62.34
1 6
6.43
5.26
10.09
9.65
62.38
1 6
6.53
5.26
10.06
B.62
62.42
1 6
6.63
5.26
10.03
9.58
62.45
1 6
6.73
5.26
10.00
8.55
62.49
i 6
6:.93
5.27
9.96
8.52
62.53
1. 6
6.93
5.27
9.93
8.48
62.57
1 6
7.03
5.27
9=90
8.45
62.61
i 6
7.13
5.23
9.87
8.42
62.64
1 6
7.23
5.28
9,84
8.38
62.68
1 6
7.33
5.28
9.91
8.35
62.72
1 6
7.43
5.29
9.77
8.32
62.76
1. 6
7.53
5.29
9.74
3.28
62.80
1 6
7,63
5.29
9.71
9.25
62.83
1 6
7.73
5.30
9.68
8.22
62.87
1 6
7.93
5.30
9.65
3.19
62.91
1. 6
7.93
5.30
9,.62
8.16
62.95
1 6
9.03
5.31
9.59
B.12
62.99
1 6
8.13
5.31
9.56
8.09
63.02
1 7
8.13
5.34
9.46
8.01
63.79
17
8.23
5.34
9.42
7.96
63.96
1 7
8..33
5.35
9.37
7.92
64.13
1 7
8.43
5.36
9.33
7.87
64.30
1 7
3.53
5.37
9.29
7.83
64.47
i 7
3.63
5.37
9„24
7.78
64.64
1 7
3.73
5.38
9.20
7.74
.64.81
1 7
8.83
5.39
9.15
7.69
64.98
1 7
8.93
..40
9.1.1
7.65
65.15
1 7
9.03
5.00
9.07
7.61
65.32
i. 7
9.13
5.41
9.02
7.57
65.49
1 7
9.03
5.42
8.99
7.52
65.66
1 7
9.33
5.43
8.94
7.43
65.83
1 7
9.43
5.44
8.90
7.44
66.00
1 7
9.53
5.44
8.86
7.40
66.17
1 7
9.63
5.45
8.82
7.36
66.34

SUMMER
AT 7
MGD,
O-CONNER-DOBBINS,
WITH
SOD,
UPSTR DO =
5.55
---------- MODEL RESULTS
---
Y
H
OLK+
Discharger
2
C:ITY OF MOUNT AIRY
Receiving
----------------------------------------------------------------------
Stream ;
ARARAT RIVER
The End
D.O.
is 5.43
mg/l.
The End
CBOD
is 2.82
mg/l.
The End
NBOD
is 7,53
mg/l.
WL_A
WLA
WLA
DO Min
CEiOD
NBOD
DO
Waste Flow
(mg/1.)
Mi.lepoint Reach I#
(mg/1)
(mg/1.)
(mg/1)
(mgd)
Segment
1
5.00
0.26 1
Reach
1
60.00
60.00
=.00
7.00000
Reach
2
0.00
0.00
0.00
0.00000
Reach
3
0.00
0.00
0.00
0.00000
Reach
cF
0.00
0.00
0.00
0.00000
Reach
5
45.00
90.00
0.00
0.01300
Reach
6
0.00
0.00
0.00
0.0000(-)
Reach
7
0.00
0.00
0.00
0.0000ir

------------ MODEL RESULTS
Discharger : CITY OF MOUNT AIRY
Receiving Stream : ARARAT RIVER
---------------------------------------------
The End D.O. is 5.57 mg/i.
The End CBOD is 1.35 mg/l.
The End NBOD is 12.11 rag/l.
Segment-
1
Reach
i
Reach
2
Reach
3
Reach
4
Reach
5
Reach
b
Reach
7
SUMMER
AT 7 MOD, O'CONNER-DOBBINS,
WITH SOD, URSTR DO 5.55
Wi--- A
WLA
WLA
DO Min
CBOD
NBOD
DO
Waste Flow
(mg/1) Milepoint Reach #k
(mg/1)
tmg/1)
(mg/1)
(mgd)
5.03 0.26 1
0.00
100.00
5.00
7.00000
0.00
0.00
0.00
0,-00000
.00
0.00
0.00
0.00000
45.00
90.00
0.00
0.0180o
0.00
0.00
0.00
0.00000