NC0023299_Wasteload Allocation_19770607

Ncooz tiq
FOR DATA MANAGEMENT USE ONLY:
FACILITY NO.
TO:
Actual Facility
Proposed Facility
WASTE LOAD ALLOCATION REQUEST
Date of Request q I/O / 7e5
Mike McGhee, Technical Services Date Needed
FROM: Wil2
SUBJECT: Effluent Limits for NPDES Permit No.(001 )
Pipe No.(003 )
Draft to Public Notice (805 )
Permit. Application Received (802 )
Discharger Name (103.)
t//1 ?F. LE o ;g ' ��
County (104 )
�%�/jsr4fJ
Type (400 )
/_% Mu /
Equiv. Population Served (202 )
Latitude (115 )
° S 0' 1,rrl
Longitude (116 )
17e,/%, 3sr`�i
201 Area (263 )
208 Area (264 )
Subbasin(112 )
Stream Classification (269 )
Receiving Stream (109 )
/ C n
Drain. Area(267 )
7/10 Flow(270)
A, 'I
Ratio Waste 7/10 (303 )
Design Capacity (207 ) 'Design
L3
Temperature (NKP)
Elevation (NKP)
Location•Dis(harger NKP)
Ji
,
rrinci al Product (NKP)
I T
Sample No.
BOD5(mg/Z)
310
ecal Cal form;Temperature
100m1 31616
° F 11
DO (mg/Z)
300
41
I - Mo. Average Concentration 01
/DO
,b
- Wk. Average Concentration 02
J - Minimum Concentration 03
K - Maximwn Concentration 04
M - MonthZ Average Loading 05
- Weekl Average Loading 06
P - Minimum Loading 07
Q - Maximum Loading 08
T - Fresuenc o Anal sis 09
W - Sn 'le T . e 10
Total Residue
(mg/Z) 500
NH3-N
(m• 1) 600
Or (units)
400
775:
(m47
I - Mo. Average Concentration 21
—
-2 -
. - `,S
- Wk. Average Concentration 22,
J - Minimum Concentration 23f
K - Maximum Concentration 24
M - Monthl Average Loading 25
- Weekl Average Loading 26
P - Minimum Loading 27
Q - Maximum Loading 28
T - Freguenc o Anal sis 29
W- Sg' g le T g e 30
UOD (NKP) /4 /2 Lf4C
77

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Assimilative Capacity Calculations
a) Slope
From the USGS topographic maps the stream surface slope was estimated to be 9b feet/mile.
b) Velocity
Mean velocity and depth were estimated from USGS stream gauging data for the 7/10 low flow condi-
tions as:
depth = a. 2- --
velocity = D' 2-
c) Reaeration Coefficient K2
The value of K9 was estimated by the method developed by E. C. Tsivoglou and is given by the fol-
lowing equation:
K2 (29°C) = 0.96 dh/dx V
Where dh/dx = water surface slope (feet/mile)
V = mean river velocity (fps)
K2 (base e @ 29°C) =
d) Deoxygenation Coefficient K1
In the absence of adequate stream BOD data, k1 was assumed to be 0.35 per day at 20°C. This value
is corrected for temperature and bed activity by the following equation:
K1 (29°C) = 1.51 (k1 + (n)}
Where k1 = assumed bottle deoxygenation rate, (per day)
v = mean stream velocity (fps)
d = mean stream depth (feet)
n = coefficient of bed activity
K1 = ,', 3`/ D s,t- O ' /)
K1 (base e @ 29°C) _
e) Groundwater runoff under 7/10 low flow conditions was estimated to be -/4 "
f) Model Analysis
Predicted stream values were obtained using the above hydrologic conditions and the following values
in the water quality model:
r GL"-"`� CTP A ssoC. - c✓v- f/a/�e, !Kf7P
Stream: /� � �- Lac Discharge:
7Q10 Stream Flow (mgd) = 6 Discharge Flow (mgd) = D. D
Stream BODu1t (mg/1) = — Discharge BODuit (mg/1) =
Stream DO (mg/1) = — Discharge DO (mg/1) _
Miles Below Outfall
DO (mg/1) BOD„lt (mg/1)