NC0021491_Wasteload Allocation_19871125

PERMIT NO.: NCOO ,Z /-/e7-1
FACILITY NAME: / 1-P
Facility Status: �"""""' PROPOSED
(circle one)
NPDES WASTE LOAD ALLOCATION
Permit Status: RENEWAL MODWICATION UNPERMrr ED NEW
(circle one)
Major _MinorJ/�
Pipe No: U /
Design Capacity (MGD): 4, 69
Domestic of Flowh % 7
Industrial (X of Flow):.3
Comments:
RECEIVING STREAM: _%�)crle `i me.,i
Class: r
Sub -Basin: D 07 v,S
Reference USGS Quad:. - �6 A/E (please attach)
County:
Regional Office: As Fa Mo Ra Wa W1(WS (circle one)
Requested By:- rrrnUl J� �i-�`� Date: 1?/ k 7
Prepared By:LaAla% Date: /
Reviewed By: `L Date: 4tz
L--- // as 6 �
Modeler
Date Rec.
�"c v
cjz s e 7
T�zz 1
Drainage Area (mid) Avg. Streamflow (cfs):
7Q10 (cfs) 1`� Winter 7Q10 (cfs) 30Q2 (cfs)
Toxicity Limits: IWC _ �•�0 % (circle one) Acute / �on
Instream Monitoring:
Parameters es
A 4 Ve, GaJ (WU,,,
Upstream Location :r" DGzP Jl�
Downstream Location D u)enc z
rK
woomtt 2 Uov, - wa�
Effluent
Characteristics
Summer
Winter
BOD5 (mg/1)
NHS-N (mg/1)
c�
D.O. (mg/1)
TSS (mg/1)
F. Col. (/100m1)
1060
PH (SU)11
-
(' @-A ��
_
scorn-��e�
���- ���
� • f"�:
Comments:

. ,
, .
. .
. .
Request No. :4221
------------------.... ..... ..... WASTELOAD ALLOCATION APPROVAL FORM ---------------------
Permit Number
Facility Name
Type of Waste
Status
Receiving Stream
Stream Class
Subbasin
County
Regional Office
Requestor
Date of Request
Quad
NC0021491
MOCKSVILLE WWTP
77% DOMESTIC / 23% INDUSTRIAL
EXISTING
DUTCHMAN'S CREEK
C
030705
DAVIE
WSRO
THOMAS CHRIST
9/21/87
D16NE
Drainage Area (sq mi) : 108
Average Flow (cfs) : 108
Summer 7010 (cfs) : 15
Winter 7010 (cfs) : 26
3002 (cfs) :
------------------------- RECOMMENDED EFFLUENT LIMITS -------------------------
Wasteflow
:
(mgd):
5-Day BOD
(mg/l):
Ammonia Nitrogen
(mg/1);
Dissolved Oxygen
(mg/1):
TSS
(mg/1):
Fecal Coliform (0/100ml):
pH
(SU):
Copper
(mg/1):
Cyanide
(mg/l):
:
0.68
RECENED
24 N.C.~^p^ '`'~^~
14
5 NOV V u"m,
30 |
1000'
6-9 . ��oe
i '`=s
°��~1�is�, �� } � °�="�p� mvv^�� , h � ---
O.0762 v
--------------------------------- MONITORING ---------------------------------
Upstream (YIN): Y Location: ABOVE DISHCARGE POINT
Downstream (Y/N): Y Location: APPROX. 5.0 MILES BELOW DISCHARGE POINT
RECOMMEND EFFLUENT MONITORING FOR: CADMIUM, CHROMIUM, NICKEL, LEAD, AND
SILVER. AS orn
RECOMMEND INSTREAM MONITORING FOR: DO, TEMPERATURE, FECAL COLIFORM, AND
CONDUCTIVITY.
FREQUENCY: WEEKLY FOR SUMMER (APR-OCT) AND MONTHLY FOR WINTER (NOV-MAR)
SEE TOXICITY TESTING REQUIREMENTS ATTACHED
E_7/�o����=�6Z�������____
Recommended by _ Date
Reviewed by;, -
Tech. Support Supervisor Date
Regional Supervisor Date
Permits & Engineering Date
��
DEC�/K v�wv
=~.�--
RETURN TO TECHNICAL SERVICES BY

rFacility Name ©G Z° /
Permit / �C�� ��49 P/
TOXICITY TESTING REQUIREMENT
The effluent discharge shall at no time exhibit chronic toxicity using
test procedures outlined in:
1.) The North Carolina Ceriodaphnia chronic effluent bioassay proce-
dure (North Carolina Chronic Bioassay Procedure - Revised *February 1987) or
subsequent versions.
The effluent concentration at which there may be no observable inhibi-
tion of reproduction or significant mortality is &e (defined as treatment
two in the North Carolina procedure document). The permit holder shall
perform &041114 monitoring using this procedure to establish compliance
with the permi condition. The first test will be performed within thirty
days from issuance of this permit. Effluent sampling for this testing shall
be performed at the NPDES permitted final effluent discharge below all
treatment processes.
All toxicity testing results required as part of this permit condition
will be entered on the Effluent Discharge Monitoring Form (MR-1) for the
month in.which it was performed, using the appropriate parameter code.
Additionally, DEM Form 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 chemi-
cal/physical measurements performed in association with the toxicity tests,
as well as all dose/response data. Total residual chlorine must be measured
and reported if chlorine is employed for disinfection of the waste stream.
Should any test data from this monitoring recuirement or tests per-
formed by the.North Carolina Division of Environmental Management indicate
potential i=acts to the receiving stream, this pernit may be re -opened and
modified to include alternate monitoring requirements or limits.
NOTE: Failure to achieve test conditions as specified in the cited docu-
ment, such as minimum control organism survival and appropriate environmen-
tal controls, shall constitute an invalid test and will require immediate
retesting. Failure to submit suitable test results will constitute a fail-
ure of permit condition.
7Q10 cfs
Per sited glow MGD Recommende by:
Basin & Sub -basin W 05
Receiving Stream 40SL'Llit_
County 6a ytr - Date ,?o

Po 11 utant
-------------
Cadmium
Chromium
Copper
Nickel
Lead
Zinc
Cyanide
Mercury
Silver
Cadmium
Chromium
Copper
Nickel
Lead
Zinc
Cyanide
Mercury
Silver
PRETREATMENT HEADWORKS REVIEW
---------------------------------
Discharger:
Receiving stream:
Stream Class:
USGS Zone:
7Q10:
Design flow:
Actual flow:
Percent industrial:
MOCKSVILLE WWTP
DUTCHMAN'S
CREEK
C
1
15.000
cfs
0.680
mgd
0.3945
mgd
23.0
%
6.6
%
10/30/87
Actual
Actual
Allowable
Domestic
Industrial
Standard/AL
Removal
Load (a)
Load
Load
(mg/1)
Eff.
(lbs/day)
(lbs/day)
_________
(lbs/day)
_________
___________
0.002
S
_______
92%
_________
2.10
0.010
0.010
0.05
S
76%
17.53
0.010
0.010
0.015
AL
58%
3.01
0.080
0.080
0.05
S
32%
6.19
0.020
0.010
0.025
S
81%
11.07
0.080
0.060
0.05
AL
77%
18.29
0.450
0.400
0.005
S
59%
1.03
0.070
0.000
0.0002
S
86%
0.12
0.01
AL
94%
14.03
0.010
0.010
Total
USGS
Predicted
Allowable
Influent
Background
Effluent
Effluent
Load
Reserve
Conc
Conc (b)
Conc (c)
(lbs/day)
(lbs/day)
(mg/1)
..... ... ..... ..... ..... .... .....
(mg/1)
..... .... ..... .... .... ..... .... _
(mg/1)
..... __... ..... _..... _
.... ..... .... .... ..... ..... ..... .... .....
0.02
..... ..... .... .... .... ..... .... ..... _
2.08
..... ....
0.0005
0 0305
0.02
17.51
0.013
0.0015
0.5766
0.16
2.85
0.004
0.0204 >
0.1715
0.03
6.16
0.0062
0.7616
0.14
10.93
0.005
0.0081
0.3096
0.85
17.44
0.012
0.0594 >
0.5908
0.07
0.96
0.0087 >
0.0762
0.00
0.12
0.0003
0.0000 >
-0.0012
0.02
14.01
0.0004
0.1523

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